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 - 2015 Intel Corporation.";
64 static const struct ixgbevf_info
*ixgbevf_info_tbl
[] = {
65 [board_82599_vf
] = &ixgbevf_82599_vf_info
,
66 [board_82599_vf_hv
] = &ixgbevf_82599_vf_hv_info
,
67 [board_X540_vf
] = &ixgbevf_X540_vf_info
,
68 [board_X540_vf_hv
] = &ixgbevf_X540_vf_hv_info
,
69 [board_X550_vf
] = &ixgbevf_X550_vf_info
,
70 [board_X550_vf_hv
] = &ixgbevf_X550_vf_hv_info
,
71 [board_X550EM_x_vf
] = &ixgbevf_X550EM_x_vf_info
,
72 [board_X550EM_x_vf_hv
] = &ixgbevf_X550EM_x_vf_hv_info
,
75 /* ixgbevf_pci_tbl - PCI Device ID Table
77 * Wildcard entries (PCI_ANY_ID) should come last
78 * Last entry must be all 0s
80 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
81 * Class, Class Mask, private data (not used) }
83 static const struct pci_device_id ixgbevf_pci_tbl
[] = {
84 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_82599_VF
), board_82599_vf
},
85 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_82599_VF_HV
), board_82599_vf_hv
},
86 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X540_VF
), board_X540_vf
},
87 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X540_VF_HV
), board_X540_vf_hv
},
88 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550_VF
), board_X550_vf
},
89 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550_VF_HV
), board_X550_vf_hv
},
90 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550EM_X_VF
), board_X550EM_x_vf
},
91 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550EM_X_VF_HV
), board_X550EM_x_vf_hv
},
92 /* required last entry */
95 MODULE_DEVICE_TABLE(pci
, ixgbevf_pci_tbl
);
97 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
98 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
99 MODULE_LICENSE("GPL");
100 MODULE_VERSION(DRV_VERSION
);
102 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
103 static int debug
= -1;
104 module_param(debug
, int, 0);
105 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
107 static struct workqueue_struct
*ixgbevf_wq
;
109 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter
*adapter
)
111 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
112 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
) &&
113 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
))
114 queue_work(ixgbevf_wq
, &adapter
->service_task
);
117 static void ixgbevf_service_event_complete(struct ixgbevf_adapter
*adapter
)
119 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
));
121 /* flush memory to make sure state is correct before next watchdog */
122 smp_mb__before_atomic();
123 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
127 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
);
128 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
);
129 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
);
131 static void ixgbevf_remove_adapter(struct ixgbe_hw
*hw
)
133 struct ixgbevf_adapter
*adapter
= hw
->back
;
138 dev_err(&adapter
->pdev
->dev
, "Adapter removed\n");
139 if (test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
140 ixgbevf_service_event_schedule(adapter
);
143 static void ixgbevf_check_remove(struct ixgbe_hw
*hw
, u32 reg
)
147 /* The following check not only optimizes a bit by not
148 * performing a read on the status register when the
149 * register just read was a status register read that
150 * returned IXGBE_FAILED_READ_REG. It also blocks any
151 * potential recursion.
153 if (reg
== IXGBE_VFSTATUS
) {
154 ixgbevf_remove_adapter(hw
);
157 value
= ixgbevf_read_reg(hw
, IXGBE_VFSTATUS
);
158 if (value
== IXGBE_FAILED_READ_REG
)
159 ixgbevf_remove_adapter(hw
);
162 u32
ixgbevf_read_reg(struct ixgbe_hw
*hw
, u32 reg
)
164 u8 __iomem
*reg_addr
= ACCESS_ONCE(hw
->hw_addr
);
167 if (IXGBE_REMOVED(reg_addr
))
168 return IXGBE_FAILED_READ_REG
;
169 value
= readl(reg_addr
+ reg
);
170 if (unlikely(value
== IXGBE_FAILED_READ_REG
))
171 ixgbevf_check_remove(hw
, reg
);
176 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
177 * @adapter: pointer to adapter struct
178 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
179 * @queue: queue to map the corresponding interrupt to
180 * @msix_vector: the vector to map to the corresponding queue
182 static void ixgbevf_set_ivar(struct ixgbevf_adapter
*adapter
, s8 direction
,
183 u8 queue
, u8 msix_vector
)
186 struct ixgbe_hw
*hw
= &adapter
->hw
;
188 if (direction
== -1) {
190 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
191 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR_MISC
);
194 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR_MISC
, ivar
);
196 /* Tx or Rx causes */
197 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
198 index
= ((16 * (queue
& 1)) + (8 * direction
));
199 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR(queue
>> 1));
200 ivar
&= ~(0xFF << index
);
201 ivar
|= (msix_vector
<< index
);
202 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR(queue
>> 1), ivar
);
206 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring
*tx_ring
,
207 struct ixgbevf_tx_buffer
*tx_buffer
)
209 if (tx_buffer
->skb
) {
210 dev_kfree_skb_any(tx_buffer
->skb
);
211 if (dma_unmap_len(tx_buffer
, len
))
212 dma_unmap_single(tx_ring
->dev
,
213 dma_unmap_addr(tx_buffer
, dma
),
214 dma_unmap_len(tx_buffer
, len
),
216 } else if (dma_unmap_len(tx_buffer
, len
)) {
217 dma_unmap_page(tx_ring
->dev
,
218 dma_unmap_addr(tx_buffer
, dma
),
219 dma_unmap_len(tx_buffer
, len
),
222 tx_buffer
->next_to_watch
= NULL
;
223 tx_buffer
->skb
= NULL
;
224 dma_unmap_len_set(tx_buffer
, len
, 0);
225 /* tx_buffer must be completely set up in the transmit path */
228 static u64
ixgbevf_get_tx_completed(struct ixgbevf_ring
*ring
)
230 return ring
->stats
.packets
;
233 static u32
ixgbevf_get_tx_pending(struct ixgbevf_ring
*ring
)
235 struct ixgbevf_adapter
*adapter
= netdev_priv(ring
->netdev
);
236 struct ixgbe_hw
*hw
= &adapter
->hw
;
238 u32 head
= IXGBE_READ_REG(hw
, IXGBE_VFTDH(ring
->reg_idx
));
239 u32 tail
= IXGBE_READ_REG(hw
, IXGBE_VFTDT(ring
->reg_idx
));
242 return (head
< tail
) ?
243 tail
- head
: (tail
+ ring
->count
- head
);
248 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring
*tx_ring
)
250 u32 tx_done
= ixgbevf_get_tx_completed(tx_ring
);
251 u32 tx_done_old
= tx_ring
->tx_stats
.tx_done_old
;
252 u32 tx_pending
= ixgbevf_get_tx_pending(tx_ring
);
254 clear_check_for_tx_hang(tx_ring
);
256 /* Check for a hung queue, but be thorough. This verifies
257 * that a transmit has been completed since the previous
258 * check AND there is at least one packet pending. The
259 * ARMED bit is set to indicate a potential hang.
261 if ((tx_done_old
== tx_done
) && tx_pending
) {
262 /* make sure it is true for two checks in a row */
263 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED
,
266 /* reset the countdown */
267 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &tx_ring
->state
);
269 /* update completed stats and continue */
270 tx_ring
->tx_stats
.tx_done_old
= tx_done
;
275 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter
*adapter
)
277 /* Do the reset outside of interrupt context */
278 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
279 set_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
);
280 ixgbevf_service_event_schedule(adapter
);
285 * ixgbevf_tx_timeout - Respond to a Tx Hang
286 * @netdev: network interface device structure
288 static void ixgbevf_tx_timeout(struct net_device
*netdev
)
290 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
292 ixgbevf_tx_timeout_reset(adapter
);
296 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
297 * @q_vector: board private structure
298 * @tx_ring: tx ring to clean
299 * @napi_budget: Used to determine if we are in netpoll
301 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector
*q_vector
,
302 struct ixgbevf_ring
*tx_ring
, int napi_budget
)
304 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
305 struct ixgbevf_tx_buffer
*tx_buffer
;
306 union ixgbe_adv_tx_desc
*tx_desc
;
307 unsigned int total_bytes
= 0, total_packets
= 0;
308 unsigned int budget
= tx_ring
->count
/ 2;
309 unsigned int i
= tx_ring
->next_to_clean
;
311 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
314 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
315 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
319 union ixgbe_adv_tx_desc
*eop_desc
= tx_buffer
->next_to_watch
;
321 /* if next_to_watch is not set then there is no work pending */
325 /* prevent any other reads prior to eop_desc */
326 read_barrier_depends();
328 /* if DD is not set pending work has not been completed */
329 if (!(eop_desc
->wb
.status
& cpu_to_le32(IXGBE_TXD_STAT_DD
)))
332 /* clear next_to_watch to prevent false hangs */
333 tx_buffer
->next_to_watch
= NULL
;
335 /* update the statistics for this packet */
336 total_bytes
+= tx_buffer
->bytecount
;
337 total_packets
+= tx_buffer
->gso_segs
;
340 napi_consume_skb(tx_buffer
->skb
, napi_budget
);
342 /* unmap skb header data */
343 dma_unmap_single(tx_ring
->dev
,
344 dma_unmap_addr(tx_buffer
, dma
),
345 dma_unmap_len(tx_buffer
, len
),
348 /* clear tx_buffer data */
349 tx_buffer
->skb
= NULL
;
350 dma_unmap_len_set(tx_buffer
, len
, 0);
352 /* unmap remaining buffers */
353 while (tx_desc
!= eop_desc
) {
359 tx_buffer
= tx_ring
->tx_buffer_info
;
360 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
363 /* unmap any remaining paged data */
364 if (dma_unmap_len(tx_buffer
, len
)) {
365 dma_unmap_page(tx_ring
->dev
,
366 dma_unmap_addr(tx_buffer
, dma
),
367 dma_unmap_len(tx_buffer
, len
),
369 dma_unmap_len_set(tx_buffer
, len
, 0);
373 /* move us one more past the eop_desc for start of next pkt */
379 tx_buffer
= tx_ring
->tx_buffer_info
;
380 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
383 /* issue prefetch for next Tx descriptor */
386 /* update budget accounting */
388 } while (likely(budget
));
391 tx_ring
->next_to_clean
= i
;
392 u64_stats_update_begin(&tx_ring
->syncp
);
393 tx_ring
->stats
.bytes
+= total_bytes
;
394 tx_ring
->stats
.packets
+= total_packets
;
395 u64_stats_update_end(&tx_ring
->syncp
);
396 q_vector
->tx
.total_bytes
+= total_bytes
;
397 q_vector
->tx
.total_packets
+= total_packets
;
399 if (check_for_tx_hang(tx_ring
) && ixgbevf_check_tx_hang(tx_ring
)) {
400 struct ixgbe_hw
*hw
= &adapter
->hw
;
401 union ixgbe_adv_tx_desc
*eop_desc
;
403 eop_desc
= tx_ring
->tx_buffer_info
[i
].next_to_watch
;
405 pr_err("Detected Tx Unit Hang\n"
407 " TDH, TDT <%x>, <%x>\n"
408 " next_to_use <%x>\n"
409 " next_to_clean <%x>\n"
410 "tx_buffer_info[next_to_clean]\n"
411 " next_to_watch <%p>\n"
412 " eop_desc->wb.status <%x>\n"
413 " time_stamp <%lx>\n"
415 tx_ring
->queue_index
,
416 IXGBE_READ_REG(hw
, IXGBE_VFTDH(tx_ring
->reg_idx
)),
417 IXGBE_READ_REG(hw
, IXGBE_VFTDT(tx_ring
->reg_idx
)),
418 tx_ring
->next_to_use
, i
,
419 eop_desc
, (eop_desc
? eop_desc
->wb
.status
: 0),
420 tx_ring
->tx_buffer_info
[i
].time_stamp
, jiffies
);
422 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
424 /* schedule immediate reset if we believe we hung */
425 ixgbevf_tx_timeout_reset(adapter
);
430 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
431 if (unlikely(total_packets
&& netif_carrier_ok(tx_ring
->netdev
) &&
432 (ixgbevf_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
))) {
433 /* Make sure that anybody stopping the queue after this
434 * sees the new next_to_clean.
438 if (__netif_subqueue_stopped(tx_ring
->netdev
,
439 tx_ring
->queue_index
) &&
440 !test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
441 netif_wake_subqueue(tx_ring
->netdev
,
442 tx_ring
->queue_index
);
443 ++tx_ring
->tx_stats
.restart_queue
;
451 * ixgbevf_rx_skb - Helper function to determine proper Rx method
452 * @q_vector: structure containing interrupt and ring information
453 * @skb: packet to send up
455 static void ixgbevf_rx_skb(struct ixgbevf_q_vector
*q_vector
,
458 #ifdef CONFIG_NET_RX_BUSY_POLL
459 skb_mark_napi_id(skb
, &q_vector
->napi
);
461 if (ixgbevf_qv_busy_polling(q_vector
)) {
462 netif_receive_skb(skb
);
463 /* exit early if we busy polled */
466 #endif /* CONFIG_NET_RX_BUSY_POLL */
468 napi_gro_receive(&q_vector
->napi
, skb
);
471 #define IXGBE_RSS_L4_TYPES_MASK \
472 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
473 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
474 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
475 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
477 static inline void ixgbevf_rx_hash(struct ixgbevf_ring
*ring
,
478 union ixgbe_adv_rx_desc
*rx_desc
,
483 if (!(ring
->netdev
->features
& NETIF_F_RXHASH
))
486 rss_type
= le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.pkt_info
) &
487 IXGBE_RXDADV_RSSTYPE_MASK
;
492 skb_set_hash(skb
, le32_to_cpu(rx_desc
->wb
.lower
.hi_dword
.rss
),
493 (IXGBE_RSS_L4_TYPES_MASK
& (1ul << rss_type
)) ?
494 PKT_HASH_TYPE_L4
: PKT_HASH_TYPE_L3
);
498 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
499 * @ring: structure containig ring specific data
500 * @rx_desc: current Rx descriptor being processed
501 * @skb: skb currently being received and modified
503 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring
*ring
,
504 union ixgbe_adv_rx_desc
*rx_desc
,
507 skb_checksum_none_assert(skb
);
509 /* Rx csum disabled */
510 if (!(ring
->netdev
->features
& NETIF_F_RXCSUM
))
513 /* if IP and error */
514 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_IPCS
) &&
515 ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_IPE
)) {
516 ring
->rx_stats
.csum_err
++;
520 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_L4CS
))
523 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_TCPE
)) {
524 ring
->rx_stats
.csum_err
++;
528 /* It must be a TCP or UDP packet with a valid checksum */
529 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
533 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
534 * @rx_ring: rx descriptor ring packet is being transacted on
535 * @rx_desc: pointer to the EOP Rx descriptor
536 * @skb: pointer to current skb being populated
538 * This function checks the ring, descriptor, and packet information in
539 * order to populate the checksum, VLAN, protocol, and other fields within
542 static void ixgbevf_process_skb_fields(struct ixgbevf_ring
*rx_ring
,
543 union ixgbe_adv_rx_desc
*rx_desc
,
546 ixgbevf_rx_hash(rx_ring
, rx_desc
, skb
);
547 ixgbevf_rx_checksum(rx_ring
, rx_desc
, skb
);
549 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_VP
)) {
550 u16 vid
= le16_to_cpu(rx_desc
->wb
.upper
.vlan
);
551 unsigned long *active_vlans
= netdev_priv(rx_ring
->netdev
);
553 if (test_bit(vid
& VLAN_VID_MASK
, active_vlans
))
554 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vid
);
557 skb
->protocol
= eth_type_trans(skb
, rx_ring
->netdev
);
561 * ixgbevf_is_non_eop - process handling of non-EOP buffers
562 * @rx_ring: Rx ring being processed
563 * @rx_desc: Rx descriptor for current buffer
564 * @skb: current socket buffer containing buffer in progress
566 * This function updates next to clean. If the buffer is an EOP buffer
567 * this function exits returning false, otherwise it will place the
568 * sk_buff in the next buffer to be chained and return true indicating
569 * that this is in fact a non-EOP buffer.
571 static bool ixgbevf_is_non_eop(struct ixgbevf_ring
*rx_ring
,
572 union ixgbe_adv_rx_desc
*rx_desc
)
574 u32 ntc
= rx_ring
->next_to_clean
+ 1;
576 /* fetch, update, and store next to clean */
577 ntc
= (ntc
< rx_ring
->count
) ? ntc
: 0;
578 rx_ring
->next_to_clean
= ntc
;
580 prefetch(IXGBEVF_RX_DESC(rx_ring
, ntc
));
582 if (likely(ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_EOP
)))
588 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring
*rx_ring
,
589 struct ixgbevf_rx_buffer
*bi
)
591 struct page
*page
= bi
->page
;
592 dma_addr_t dma
= bi
->dma
;
594 /* since we are recycling buffers we should seldom need to alloc */
598 /* alloc new page for storage */
599 page
= dev_alloc_page();
600 if (unlikely(!page
)) {
601 rx_ring
->rx_stats
.alloc_rx_page_failed
++;
605 /* map page for use */
606 dma
= dma_map_page(rx_ring
->dev
, page
, 0,
607 PAGE_SIZE
, DMA_FROM_DEVICE
);
609 /* if mapping failed free memory back to system since
610 * there isn't much point in holding memory we can't use
612 if (dma_mapping_error(rx_ring
->dev
, dma
)) {
615 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
627 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
628 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
629 * @cleaned_count: number of buffers to replace
631 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring
*rx_ring
,
634 union ixgbe_adv_rx_desc
*rx_desc
;
635 struct ixgbevf_rx_buffer
*bi
;
636 unsigned int i
= rx_ring
->next_to_use
;
638 /* nothing to do or no valid netdev defined */
639 if (!cleaned_count
|| !rx_ring
->netdev
)
642 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, i
);
643 bi
= &rx_ring
->rx_buffer_info
[i
];
647 if (!ixgbevf_alloc_mapped_page(rx_ring
, bi
))
650 /* Refresh the desc even if pkt_addr didn't change
651 * because each write-back erases this info.
653 rx_desc
->read
.pkt_addr
= cpu_to_le64(bi
->dma
+ bi
->page_offset
);
659 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, 0);
660 bi
= rx_ring
->rx_buffer_info
;
664 /* clear the hdr_addr for the next_to_use descriptor */
665 rx_desc
->read
.hdr_addr
= 0;
668 } while (cleaned_count
);
672 if (rx_ring
->next_to_use
!= i
) {
673 /* record the next descriptor to use */
674 rx_ring
->next_to_use
= i
;
676 /* update next to alloc since we have filled the ring */
677 rx_ring
->next_to_alloc
= i
;
679 /* Force memory writes to complete before letting h/w
680 * know there are new descriptors to fetch. (Only
681 * applicable for weak-ordered memory model archs,
685 ixgbevf_write_tail(rx_ring
, i
);
690 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
691 * @rx_ring: rx descriptor ring packet is being transacted on
692 * @rx_desc: pointer to the EOP Rx descriptor
693 * @skb: pointer to current skb being fixed
695 * Check for corrupted packet headers caused by senders on the local L2
696 * embedded NIC switch not setting up their Tx Descriptors right. These
697 * should be very rare.
699 * Also address the case where we are pulling data in on pages only
700 * and as such no data is present in the skb header.
702 * In addition if skb is not at least 60 bytes we need to pad it so that
703 * it is large enough to qualify as a valid Ethernet frame.
705 * Returns true if an error was encountered and skb was freed.
707 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring
*rx_ring
,
708 union ixgbe_adv_rx_desc
*rx_desc
,
711 /* verify that the packet does not have any known errors */
712 if (unlikely(ixgbevf_test_staterr(rx_desc
,
713 IXGBE_RXDADV_ERR_FRAME_ERR_MASK
))) {
714 struct net_device
*netdev
= rx_ring
->netdev
;
716 if (!(netdev
->features
& NETIF_F_RXALL
)) {
717 dev_kfree_skb_any(skb
);
722 /* if eth_skb_pad returns an error the skb was freed */
723 if (eth_skb_pad(skb
))
730 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
731 * @rx_ring: rx descriptor ring to store buffers on
732 * @old_buff: donor buffer to have page reused
734 * Synchronizes page for reuse by the adapter
736 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring
*rx_ring
,
737 struct ixgbevf_rx_buffer
*old_buff
)
739 struct ixgbevf_rx_buffer
*new_buff
;
740 u16 nta
= rx_ring
->next_to_alloc
;
742 new_buff
= &rx_ring
->rx_buffer_info
[nta
];
744 /* update, and store next to alloc */
746 rx_ring
->next_to_alloc
= (nta
< rx_ring
->count
) ? nta
: 0;
748 /* transfer page from old buffer to new buffer */
749 new_buff
->page
= old_buff
->page
;
750 new_buff
->dma
= old_buff
->dma
;
751 new_buff
->page_offset
= old_buff
->page_offset
;
753 /* sync the buffer for use by the device */
754 dma_sync_single_range_for_device(rx_ring
->dev
, new_buff
->dma
,
755 new_buff
->page_offset
,
760 static inline bool ixgbevf_page_is_reserved(struct page
*page
)
762 return (page_to_nid(page
) != numa_mem_id()) || page_is_pfmemalloc(page
);
766 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
767 * @rx_ring: rx descriptor ring to transact packets on
768 * @rx_buffer: buffer containing page to add
769 * @rx_desc: descriptor containing length of buffer written by hardware
770 * @skb: sk_buff to place the data into
772 * This function will add the data contained in rx_buffer->page to the skb.
773 * This is done either through a direct copy if the data in the buffer is
774 * less than the skb header size, otherwise it will just attach the page as
777 * The function will then update the page offset if necessary and return
778 * true if the buffer can be reused by the adapter.
780 static bool ixgbevf_add_rx_frag(struct ixgbevf_ring
*rx_ring
,
781 struct ixgbevf_rx_buffer
*rx_buffer
,
782 union ixgbe_adv_rx_desc
*rx_desc
,
785 struct page
*page
= rx_buffer
->page
;
786 unsigned char *va
= page_address(page
) + rx_buffer
->page_offset
;
787 unsigned int size
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
788 #if (PAGE_SIZE < 8192)
789 unsigned int truesize
= IXGBEVF_RX_BUFSZ
;
791 unsigned int truesize
= ALIGN(size
, L1_CACHE_BYTES
);
793 unsigned int pull_len
;
795 if (unlikely(skb_is_nonlinear(skb
)))
798 if (likely(size
<= IXGBEVF_RX_HDR_SIZE
)) {
799 memcpy(__skb_put(skb
, size
), va
, ALIGN(size
, sizeof(long)));
801 /* page is not reserved, we can reuse buffer as is */
802 if (likely(!ixgbevf_page_is_reserved(page
)))
805 /* this page cannot be reused so discard it */
810 /* we need the header to contain the greater of either ETH_HLEN or
811 * 60 bytes if the skb->len is less than 60 for skb_pad.
813 pull_len
= eth_get_headlen(va
, IXGBEVF_RX_HDR_SIZE
);
815 /* align pull length to size of long to optimize memcpy performance */
816 memcpy(__skb_put(skb
, pull_len
), va
, ALIGN(pull_len
, sizeof(long)));
818 /* update all of the pointers */
823 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
824 (unsigned long)va
& ~PAGE_MASK
, size
, truesize
);
826 /* avoid re-using remote pages */
827 if (unlikely(ixgbevf_page_is_reserved(page
)))
830 #if (PAGE_SIZE < 8192)
831 /* if we are only owner of page we can reuse it */
832 if (unlikely(page_count(page
) != 1))
835 /* flip page offset to other buffer */
836 rx_buffer
->page_offset
^= IXGBEVF_RX_BUFSZ
;
839 /* move offset up to the next cache line */
840 rx_buffer
->page_offset
+= truesize
;
842 if (rx_buffer
->page_offset
> (PAGE_SIZE
- IXGBEVF_RX_BUFSZ
))
846 /* Even if we own the page, we are not allowed to use atomic_set()
847 * This would break get_page_unless_zero() users.
854 static struct sk_buff
*ixgbevf_fetch_rx_buffer(struct ixgbevf_ring
*rx_ring
,
855 union ixgbe_adv_rx_desc
*rx_desc
,
858 struct ixgbevf_rx_buffer
*rx_buffer
;
861 rx_buffer
= &rx_ring
->rx_buffer_info
[rx_ring
->next_to_clean
];
862 page
= rx_buffer
->page
;
866 void *page_addr
= page_address(page
) +
867 rx_buffer
->page_offset
;
869 /* prefetch first cache line of first page */
871 #if L1_CACHE_BYTES < 128
872 prefetch(page_addr
+ L1_CACHE_BYTES
);
875 /* allocate a skb to store the frags */
876 skb
= netdev_alloc_skb_ip_align(rx_ring
->netdev
,
877 IXGBEVF_RX_HDR_SIZE
);
878 if (unlikely(!skb
)) {
879 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
883 /* we will be copying header into skb->data in
884 * pskb_may_pull so it is in our interest to prefetch
885 * it now to avoid a possible cache miss
887 prefetchw(skb
->data
);
890 /* we are reusing so sync this buffer for CPU use */
891 dma_sync_single_range_for_cpu(rx_ring
->dev
,
893 rx_buffer
->page_offset
,
897 /* pull page into skb */
898 if (ixgbevf_add_rx_frag(rx_ring
, rx_buffer
, rx_desc
, skb
)) {
899 /* hand second half of page back to the ring */
900 ixgbevf_reuse_rx_page(rx_ring
, rx_buffer
);
902 /* we are not reusing the buffer so unmap it */
903 dma_unmap_page(rx_ring
->dev
, rx_buffer
->dma
,
904 PAGE_SIZE
, DMA_FROM_DEVICE
);
907 /* clear contents of buffer_info */
909 rx_buffer
->page
= NULL
;
914 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter
*adapter
,
917 struct ixgbe_hw
*hw
= &adapter
->hw
;
919 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, qmask
);
922 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector
*q_vector
,
923 struct ixgbevf_ring
*rx_ring
,
926 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
927 u16 cleaned_count
= ixgbevf_desc_unused(rx_ring
);
928 struct sk_buff
*skb
= rx_ring
->skb
;
930 while (likely(total_rx_packets
< budget
)) {
931 union ixgbe_adv_rx_desc
*rx_desc
;
933 /* return some buffers to hardware, one at a time is too slow */
934 if (cleaned_count
>= IXGBEVF_RX_BUFFER_WRITE
) {
935 ixgbevf_alloc_rx_buffers(rx_ring
, cleaned_count
);
939 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, rx_ring
->next_to_clean
);
941 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_DD
))
944 /* This memory barrier is needed to keep us from reading
945 * any other fields out of the rx_desc until we know the
946 * RXD_STAT_DD bit is set
950 /* retrieve a buffer from the ring */
951 skb
= ixgbevf_fetch_rx_buffer(rx_ring
, rx_desc
, skb
);
953 /* exit if we failed to retrieve a buffer */
959 /* fetch next buffer in frame if non-eop */
960 if (ixgbevf_is_non_eop(rx_ring
, rx_desc
))
963 /* verify the packet layout is correct */
964 if (ixgbevf_cleanup_headers(rx_ring
, rx_desc
, skb
)) {
969 /* probably a little skewed due to removing CRC */
970 total_rx_bytes
+= skb
->len
;
972 /* Workaround hardware that can't do proper VEPA multicast
975 if ((skb
->pkt_type
== PACKET_BROADCAST
||
976 skb
->pkt_type
== PACKET_MULTICAST
) &&
977 ether_addr_equal(rx_ring
->netdev
->dev_addr
,
978 eth_hdr(skb
)->h_source
)) {
979 dev_kfree_skb_irq(skb
);
983 /* populate checksum, VLAN, and protocol */
984 ixgbevf_process_skb_fields(rx_ring
, rx_desc
, skb
);
986 ixgbevf_rx_skb(q_vector
, skb
);
988 /* reset skb pointer */
991 /* update budget accounting */
995 /* place incomplete frames back on ring for completion */
998 u64_stats_update_begin(&rx_ring
->syncp
);
999 rx_ring
->stats
.packets
+= total_rx_packets
;
1000 rx_ring
->stats
.bytes
+= total_rx_bytes
;
1001 u64_stats_update_end(&rx_ring
->syncp
);
1002 q_vector
->rx
.total_packets
+= total_rx_packets
;
1003 q_vector
->rx
.total_bytes
+= total_rx_bytes
;
1005 return total_rx_packets
;
1009 * ixgbevf_poll - NAPI polling calback
1010 * @napi: napi struct with our devices info in it
1011 * @budget: amount of work driver is allowed to do this pass, in packets
1013 * This function will clean more than one or more rings associated with a
1016 static int ixgbevf_poll(struct napi_struct
*napi
, int budget
)
1018 struct ixgbevf_q_vector
*q_vector
=
1019 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1020 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1021 struct ixgbevf_ring
*ring
;
1022 int per_ring_budget
, work_done
= 0;
1023 bool clean_complete
= true;
1025 ixgbevf_for_each_ring(ring
, q_vector
->tx
) {
1026 if (!ixgbevf_clean_tx_irq(q_vector
, ring
, budget
))
1027 clean_complete
= false;
1032 #ifdef CONFIG_NET_RX_BUSY_POLL
1033 if (!ixgbevf_qv_lock_napi(q_vector
))
1037 /* attempt to distribute budget to each queue fairly, but don't allow
1038 * the budget to go below 1 because we'll exit polling
1040 if (q_vector
->rx
.count
> 1)
1041 per_ring_budget
= max(budget
/q_vector
->rx
.count
, 1);
1043 per_ring_budget
= budget
;
1045 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1046 int cleaned
= ixgbevf_clean_rx_irq(q_vector
, ring
,
1048 work_done
+= cleaned
;
1049 if (cleaned
>= per_ring_budget
)
1050 clean_complete
= false;
1053 #ifdef CONFIG_NET_RX_BUSY_POLL
1054 ixgbevf_qv_unlock_napi(q_vector
);
1057 /* If all work not completed, return budget and keep polling */
1058 if (!clean_complete
)
1060 /* all work done, exit the polling mode */
1061 napi_complete_done(napi
, work_done
);
1062 if (adapter
->rx_itr_setting
== 1)
1063 ixgbevf_set_itr(q_vector
);
1064 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
1065 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
))
1066 ixgbevf_irq_enable_queues(adapter
,
1067 BIT(q_vector
->v_idx
));
1073 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1074 * @q_vector: structure containing interrupt and ring information
1076 void ixgbevf_write_eitr(struct ixgbevf_q_vector
*q_vector
)
1078 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1079 struct ixgbe_hw
*hw
= &adapter
->hw
;
1080 int v_idx
= q_vector
->v_idx
;
1081 u32 itr_reg
= q_vector
->itr
& IXGBE_MAX_EITR
;
1083 /* set the WDIS bit to not clear the timer bits and cause an
1084 * immediate assertion of the interrupt
1086 itr_reg
|= IXGBE_EITR_CNT_WDIS
;
1088 IXGBE_WRITE_REG(hw
, IXGBE_VTEITR(v_idx
), itr_reg
);
1091 #ifdef CONFIG_NET_RX_BUSY_POLL
1092 /* must be called with local_bh_disable()d */
1093 static int ixgbevf_busy_poll_recv(struct napi_struct
*napi
)
1095 struct ixgbevf_q_vector
*q_vector
=
1096 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1097 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1098 struct ixgbevf_ring
*ring
;
1101 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
1102 return LL_FLUSH_FAILED
;
1104 if (!ixgbevf_qv_lock_poll(q_vector
))
1105 return LL_FLUSH_BUSY
;
1107 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1108 found
= ixgbevf_clean_rx_irq(q_vector
, ring
, 4);
1109 #ifdef BP_EXTENDED_STATS
1111 ring
->stats
.cleaned
+= found
;
1113 ring
->stats
.misses
++;
1119 ixgbevf_qv_unlock_poll(q_vector
);
1123 #endif /* CONFIG_NET_RX_BUSY_POLL */
1126 * ixgbevf_configure_msix - Configure MSI-X hardware
1127 * @adapter: board private structure
1129 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1132 static void ixgbevf_configure_msix(struct ixgbevf_adapter
*adapter
)
1134 struct ixgbevf_q_vector
*q_vector
;
1135 int q_vectors
, v_idx
;
1137 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1138 adapter
->eims_enable_mask
= 0;
1140 /* Populate the IVAR table and set the ITR values to the
1141 * corresponding register.
1143 for (v_idx
= 0; v_idx
< q_vectors
; v_idx
++) {
1144 struct ixgbevf_ring
*ring
;
1146 q_vector
= adapter
->q_vector
[v_idx
];
1148 ixgbevf_for_each_ring(ring
, q_vector
->rx
)
1149 ixgbevf_set_ivar(adapter
, 0, ring
->reg_idx
, v_idx
);
1151 ixgbevf_for_each_ring(ring
, q_vector
->tx
)
1152 ixgbevf_set_ivar(adapter
, 1, ring
->reg_idx
, v_idx
);
1154 if (q_vector
->tx
.ring
&& !q_vector
->rx
.ring
) {
1155 /* Tx only vector */
1156 if (adapter
->tx_itr_setting
== 1)
1157 q_vector
->itr
= IXGBE_12K_ITR
;
1159 q_vector
->itr
= adapter
->tx_itr_setting
;
1161 /* Rx or Rx/Tx vector */
1162 if (adapter
->rx_itr_setting
== 1)
1163 q_vector
->itr
= IXGBE_20K_ITR
;
1165 q_vector
->itr
= adapter
->rx_itr_setting
;
1168 /* add q_vector eims value to global eims_enable_mask */
1169 adapter
->eims_enable_mask
|= BIT(v_idx
);
1171 ixgbevf_write_eitr(q_vector
);
1174 ixgbevf_set_ivar(adapter
, -1, 1, v_idx
);
1175 /* setup eims_other and add value to global eims_enable_mask */
1176 adapter
->eims_other
= BIT(v_idx
);
1177 adapter
->eims_enable_mask
|= adapter
->eims_other
;
1180 enum latency_range
{
1184 latency_invalid
= 255
1188 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1189 * @q_vector: structure containing interrupt and ring information
1190 * @ring_container: structure containing ring performance data
1192 * Stores a new ITR value based on packets and byte
1193 * counts during the last interrupt. The advantage of per interrupt
1194 * computation is faster updates and more accurate ITR for the current
1195 * traffic pattern. Constants in this function were computed
1196 * based on theoretical maximum wire speed and thresholds were set based
1197 * on testing data as well as attempting to minimize response time
1198 * while increasing bulk throughput.
1200 static void ixgbevf_update_itr(struct ixgbevf_q_vector
*q_vector
,
1201 struct ixgbevf_ring_container
*ring_container
)
1203 int bytes
= ring_container
->total_bytes
;
1204 int packets
= ring_container
->total_packets
;
1207 u8 itr_setting
= ring_container
->itr
;
1212 /* simple throttle rate management
1213 * 0-20MB/s lowest (100000 ints/s)
1214 * 20-100MB/s low (20000 ints/s)
1215 * 100-1249MB/s bulk (12000 ints/s)
1217 /* what was last interrupt timeslice? */
1218 timepassed_us
= q_vector
->itr
>> 2;
1219 bytes_perint
= bytes
/ timepassed_us
; /* bytes/usec */
1221 switch (itr_setting
) {
1222 case lowest_latency
:
1223 if (bytes_perint
> 10)
1224 itr_setting
= low_latency
;
1227 if (bytes_perint
> 20)
1228 itr_setting
= bulk_latency
;
1229 else if (bytes_perint
<= 10)
1230 itr_setting
= lowest_latency
;
1233 if (bytes_perint
<= 20)
1234 itr_setting
= low_latency
;
1238 /* clear work counters since we have the values we need */
1239 ring_container
->total_bytes
= 0;
1240 ring_container
->total_packets
= 0;
1242 /* write updated itr to ring container */
1243 ring_container
->itr
= itr_setting
;
1246 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
)
1248 u32 new_itr
= q_vector
->itr
;
1251 ixgbevf_update_itr(q_vector
, &q_vector
->tx
);
1252 ixgbevf_update_itr(q_vector
, &q_vector
->rx
);
1254 current_itr
= max(q_vector
->rx
.itr
, q_vector
->tx
.itr
);
1256 switch (current_itr
) {
1257 /* counts and packets in update_itr are dependent on these numbers */
1258 case lowest_latency
:
1259 new_itr
= IXGBE_100K_ITR
;
1262 new_itr
= IXGBE_20K_ITR
;
1265 new_itr
= IXGBE_12K_ITR
;
1271 if (new_itr
!= q_vector
->itr
) {
1272 /* do an exponential smoothing */
1273 new_itr
= (10 * new_itr
* q_vector
->itr
) /
1274 ((9 * new_itr
) + q_vector
->itr
);
1276 /* save the algorithm value here */
1277 q_vector
->itr
= new_itr
;
1279 ixgbevf_write_eitr(q_vector
);
1283 static irqreturn_t
ixgbevf_msix_other(int irq
, void *data
)
1285 struct ixgbevf_adapter
*adapter
= data
;
1286 struct ixgbe_hw
*hw
= &adapter
->hw
;
1288 hw
->mac
.get_link_status
= 1;
1290 ixgbevf_service_event_schedule(adapter
);
1292 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_other
);
1298 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1300 * @data: pointer to our q_vector struct for this interrupt vector
1302 static irqreturn_t
ixgbevf_msix_clean_rings(int irq
, void *data
)
1304 struct ixgbevf_q_vector
*q_vector
= data
;
1306 /* EIAM disabled interrupts (on this vector) for us */
1307 if (q_vector
->rx
.ring
|| q_vector
->tx
.ring
)
1308 napi_schedule_irqoff(&q_vector
->napi
);
1313 static inline void map_vector_to_rxq(struct ixgbevf_adapter
*a
, int v_idx
,
1316 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1318 a
->rx_ring
[r_idx
]->next
= q_vector
->rx
.ring
;
1319 q_vector
->rx
.ring
= a
->rx_ring
[r_idx
];
1320 q_vector
->rx
.count
++;
1323 static inline void map_vector_to_txq(struct ixgbevf_adapter
*a
, int v_idx
,
1326 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1328 a
->tx_ring
[t_idx
]->next
= q_vector
->tx
.ring
;
1329 q_vector
->tx
.ring
= a
->tx_ring
[t_idx
];
1330 q_vector
->tx
.count
++;
1334 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1335 * @adapter: board private structure to initialize
1337 * This function maps descriptor rings to the queue-specific vectors
1338 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1339 * one vector per ring/queue, but on a constrained vector budget, we
1340 * group the rings as "efficiently" as possible. You would add new
1341 * mapping configurations in here.
1343 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter
*adapter
)
1347 int rxr_idx
= 0, txr_idx
= 0;
1348 int rxr_remaining
= adapter
->num_rx_queues
;
1349 int txr_remaining
= adapter
->num_tx_queues
;
1353 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1355 /* The ideal configuration...
1356 * We have enough vectors to map one per queue.
1358 if (q_vectors
== adapter
->num_rx_queues
+ adapter
->num_tx_queues
) {
1359 for (; rxr_idx
< rxr_remaining
; v_start
++, rxr_idx
++)
1360 map_vector_to_rxq(adapter
, v_start
, rxr_idx
);
1362 for (; txr_idx
< txr_remaining
; v_start
++, txr_idx
++)
1363 map_vector_to_txq(adapter
, v_start
, txr_idx
);
1367 /* If we don't have enough vectors for a 1-to-1
1368 * mapping, we'll have to group them so there are
1369 * multiple queues per vector.
1371 /* Re-adjusting *qpv takes care of the remainder. */
1372 for (i
= v_start
; i
< q_vectors
; i
++) {
1373 rqpv
= DIV_ROUND_UP(rxr_remaining
, q_vectors
- i
);
1374 for (j
= 0; j
< rqpv
; j
++) {
1375 map_vector_to_rxq(adapter
, i
, rxr_idx
);
1380 for (i
= v_start
; i
< q_vectors
; i
++) {
1381 tqpv
= DIV_ROUND_UP(txr_remaining
, q_vectors
- i
);
1382 for (j
= 0; j
< tqpv
; j
++) {
1383 map_vector_to_txq(adapter
, i
, txr_idx
);
1393 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1394 * @adapter: board private structure
1396 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1397 * interrupts from the kernel.
1399 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter
*adapter
)
1401 struct net_device
*netdev
= adapter
->netdev
;
1402 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1406 for (vector
= 0; vector
< q_vectors
; vector
++) {
1407 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[vector
];
1408 struct msix_entry
*entry
= &adapter
->msix_entries
[vector
];
1410 if (q_vector
->tx
.ring
&& q_vector
->rx
.ring
) {
1411 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1412 "%s-%s-%d", netdev
->name
, "TxRx", ri
++);
1414 } else if (q_vector
->rx
.ring
) {
1415 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1416 "%s-%s-%d", netdev
->name
, "rx", ri
++);
1417 } else if (q_vector
->tx
.ring
) {
1418 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1419 "%s-%s-%d", netdev
->name
, "tx", ti
++);
1421 /* skip this unused q_vector */
1424 err
= request_irq(entry
->vector
, &ixgbevf_msix_clean_rings
, 0,
1425 q_vector
->name
, q_vector
);
1427 hw_dbg(&adapter
->hw
,
1428 "request_irq failed for MSIX interrupt Error: %d\n",
1430 goto free_queue_irqs
;
1434 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1435 &ixgbevf_msix_other
, 0, netdev
->name
, adapter
);
1437 hw_dbg(&adapter
->hw
, "request_irq for msix_other failed: %d\n",
1439 goto free_queue_irqs
;
1447 free_irq(adapter
->msix_entries
[vector
].vector
,
1448 adapter
->q_vector
[vector
]);
1450 /* This failure is non-recoverable - it indicates the system is
1451 * out of MSIX vector resources and the VF driver cannot run
1452 * without them. Set the number of msix vectors to zero
1453 * indicating that not enough can be allocated. The error
1454 * will be returned to the user indicating device open failed.
1455 * Any further attempts to force the driver to open will also
1456 * fail. The only way to recover is to unload the driver and
1457 * reload it again. If the system has recovered some MSIX
1458 * vectors then it may succeed.
1460 adapter
->num_msix_vectors
= 0;
1464 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter
*adapter
)
1466 int i
, q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1468 for (i
= 0; i
< q_vectors
; i
++) {
1469 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[i
];
1471 q_vector
->rx
.ring
= NULL
;
1472 q_vector
->tx
.ring
= NULL
;
1473 q_vector
->rx
.count
= 0;
1474 q_vector
->tx
.count
= 0;
1479 * ixgbevf_request_irq - initialize interrupts
1480 * @adapter: board private structure
1482 * Attempts to configure interrupts using the best available
1483 * capabilities of the hardware and kernel.
1485 static int ixgbevf_request_irq(struct ixgbevf_adapter
*adapter
)
1487 int err
= ixgbevf_request_msix_irqs(adapter
);
1490 hw_dbg(&adapter
->hw
, "request_irq failed, Error %d\n", err
);
1495 static void ixgbevf_free_irq(struct ixgbevf_adapter
*adapter
)
1499 q_vectors
= adapter
->num_msix_vectors
;
1502 free_irq(adapter
->msix_entries
[i
].vector
, adapter
);
1505 for (; i
>= 0; i
--) {
1506 /* free only the irqs that were actually requested */
1507 if (!adapter
->q_vector
[i
]->rx
.ring
&&
1508 !adapter
->q_vector
[i
]->tx
.ring
)
1511 free_irq(adapter
->msix_entries
[i
].vector
,
1512 adapter
->q_vector
[i
]);
1515 ixgbevf_reset_q_vectors(adapter
);
1519 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1520 * @adapter: board private structure
1522 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter
*adapter
)
1524 struct ixgbe_hw
*hw
= &adapter
->hw
;
1527 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, 0);
1528 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMC
, ~0);
1529 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, 0);
1531 IXGBE_WRITE_FLUSH(hw
);
1533 for (i
= 0; i
< adapter
->num_msix_vectors
; i
++)
1534 synchronize_irq(adapter
->msix_entries
[i
].vector
);
1538 * ixgbevf_irq_enable - Enable default interrupt generation settings
1539 * @adapter: board private structure
1541 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter
*adapter
)
1543 struct ixgbe_hw
*hw
= &adapter
->hw
;
1545 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, adapter
->eims_enable_mask
);
1546 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, adapter
->eims_enable_mask
);
1547 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_enable_mask
);
1551 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1552 * @adapter: board private structure
1553 * @ring: structure containing ring specific data
1555 * Configure the Tx descriptor ring after a reset.
1557 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter
*adapter
,
1558 struct ixgbevf_ring
*ring
)
1560 struct ixgbe_hw
*hw
= &adapter
->hw
;
1561 u64 tdba
= ring
->dma
;
1563 u32 txdctl
= IXGBE_TXDCTL_ENABLE
;
1564 u8 reg_idx
= ring
->reg_idx
;
1566 /* disable queue to avoid issues while updating state */
1567 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), IXGBE_TXDCTL_SWFLSH
);
1568 IXGBE_WRITE_FLUSH(hw
);
1570 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAL(reg_idx
), tdba
& DMA_BIT_MASK(32));
1571 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAH(reg_idx
), tdba
>> 32);
1572 IXGBE_WRITE_REG(hw
, IXGBE_VFTDLEN(reg_idx
),
1573 ring
->count
* sizeof(union ixgbe_adv_tx_desc
));
1575 /* disable head writeback */
1576 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAH(reg_idx
), 0);
1577 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAL(reg_idx
), 0);
1579 /* enable relaxed ordering */
1580 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_TXCTRL(reg_idx
),
1581 (IXGBE_DCA_TXCTRL_DESC_RRO_EN
|
1582 IXGBE_DCA_TXCTRL_DATA_RRO_EN
));
1584 /* reset head and tail pointers */
1585 IXGBE_WRITE_REG(hw
, IXGBE_VFTDH(reg_idx
), 0);
1586 IXGBE_WRITE_REG(hw
, IXGBE_VFTDT(reg_idx
), 0);
1587 ring
->tail
= adapter
->io_addr
+ IXGBE_VFTDT(reg_idx
);
1589 /* reset ntu and ntc to place SW in sync with hardwdare */
1590 ring
->next_to_clean
= 0;
1591 ring
->next_to_use
= 0;
1593 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1594 * to or less than the number of on chip descriptors, which is
1597 txdctl
|= (8 << 16); /* WTHRESH = 8 */
1599 /* Setting PTHRESH to 32 both improves performance */
1600 txdctl
|= (1u << 8) | /* HTHRESH = 1 */
1601 32; /* PTHRESH = 32 */
1603 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &ring
->state
);
1605 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), txdctl
);
1607 /* poll to verify queue is enabled */
1609 usleep_range(1000, 2000);
1610 txdctl
= IXGBE_READ_REG(hw
, IXGBE_VFTXDCTL(reg_idx
));
1611 } while (--wait_loop
&& !(txdctl
& IXGBE_TXDCTL_ENABLE
));
1613 pr_err("Could not enable Tx Queue %d\n", reg_idx
);
1617 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1618 * @adapter: board private structure
1620 * Configure the Tx unit of the MAC after a reset.
1622 static void ixgbevf_configure_tx(struct ixgbevf_adapter
*adapter
)
1626 /* Setup the HW Tx Head and Tail descriptor pointers */
1627 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1628 ixgbevf_configure_tx_ring(adapter
, adapter
->tx_ring
[i
]);
1631 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1633 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter
*adapter
, int index
)
1635 struct ixgbe_hw
*hw
= &adapter
->hw
;
1638 srrctl
= IXGBE_SRRCTL_DROP_EN
;
1640 srrctl
|= IXGBEVF_RX_HDR_SIZE
<< IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1641 srrctl
|= IXGBEVF_RX_BUFSZ
>> IXGBE_SRRCTL_BSIZEPKT_SHIFT
;
1642 srrctl
|= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1644 IXGBE_WRITE_REG(hw
, IXGBE_VFSRRCTL(index
), srrctl
);
1647 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter
*adapter
)
1649 struct ixgbe_hw
*hw
= &adapter
->hw
;
1651 /* PSRTYPE must be initialized in 82599 */
1652 u32 psrtype
= IXGBE_PSRTYPE_TCPHDR
| IXGBE_PSRTYPE_UDPHDR
|
1653 IXGBE_PSRTYPE_IPV4HDR
| IXGBE_PSRTYPE_IPV6HDR
|
1654 IXGBE_PSRTYPE_L2HDR
;
1656 if (adapter
->num_rx_queues
> 1)
1659 IXGBE_WRITE_REG(hw
, IXGBE_VFPSRTYPE
, psrtype
);
1662 #define IXGBEVF_MAX_RX_DESC_POLL 10
1663 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter
*adapter
,
1664 struct ixgbevf_ring
*ring
)
1666 struct ixgbe_hw
*hw
= &adapter
->hw
;
1667 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1669 u8 reg_idx
= ring
->reg_idx
;
1671 if (IXGBE_REMOVED(hw
->hw_addr
))
1673 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1674 rxdctl
&= ~IXGBE_RXDCTL_ENABLE
;
1676 /* write value back with RXDCTL.ENABLE bit cleared */
1677 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1679 /* the hardware may take up to 100us to really disable the Rx queue */
1682 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1683 } while (--wait_loop
&& (rxdctl
& IXGBE_RXDCTL_ENABLE
));
1686 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1690 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter
*adapter
,
1691 struct ixgbevf_ring
*ring
)
1693 struct ixgbe_hw
*hw
= &adapter
->hw
;
1694 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1696 u8 reg_idx
= ring
->reg_idx
;
1698 if (IXGBE_REMOVED(hw
->hw_addr
))
1701 usleep_range(1000, 2000);
1702 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1703 } while (--wait_loop
&& !(rxdctl
& IXGBE_RXDCTL_ENABLE
));
1706 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1710 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter
*adapter
)
1712 struct ixgbe_hw
*hw
= &adapter
->hw
;
1713 u32 vfmrqc
= 0, vfreta
= 0;
1714 u16 rss_i
= adapter
->num_rx_queues
;
1717 /* Fill out hash function seeds */
1718 netdev_rss_key_fill(adapter
->rss_key
, sizeof(adapter
->rss_key
));
1719 for (i
= 0; i
< IXGBEVF_VFRSSRK_REGS
; i
++)
1720 IXGBE_WRITE_REG(hw
, IXGBE_VFRSSRK(i
), adapter
->rss_key
[i
]);
1722 for (i
= 0, j
= 0; i
< IXGBEVF_X550_VFRETA_SIZE
; i
++, j
++) {
1726 adapter
->rss_indir_tbl
[i
] = j
;
1728 vfreta
|= j
<< (i
& 0x3) * 8;
1730 IXGBE_WRITE_REG(hw
, IXGBE_VFRETA(i
>> 2), vfreta
);
1735 /* Perform hash on these packet types */
1736 vfmrqc
|= IXGBE_VFMRQC_RSS_FIELD_IPV4
|
1737 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP
|
1738 IXGBE_VFMRQC_RSS_FIELD_IPV6
|
1739 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP
;
1741 vfmrqc
|= IXGBE_VFMRQC_RSSEN
;
1743 IXGBE_WRITE_REG(hw
, IXGBE_VFMRQC
, vfmrqc
);
1746 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter
*adapter
,
1747 struct ixgbevf_ring
*ring
)
1749 struct ixgbe_hw
*hw
= &adapter
->hw
;
1750 u64 rdba
= ring
->dma
;
1752 u8 reg_idx
= ring
->reg_idx
;
1754 /* disable queue to avoid issues while updating state */
1755 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1756 ixgbevf_disable_rx_queue(adapter
, ring
);
1758 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAL(reg_idx
), rdba
& DMA_BIT_MASK(32));
1759 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAH(reg_idx
), rdba
>> 32);
1760 IXGBE_WRITE_REG(hw
, IXGBE_VFRDLEN(reg_idx
),
1761 ring
->count
* sizeof(union ixgbe_adv_rx_desc
));
1763 #ifndef CONFIG_SPARC
1764 /* enable relaxed ordering */
1765 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_RXCTRL(reg_idx
),
1766 IXGBE_DCA_RXCTRL_DESC_RRO_EN
);
1768 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_RXCTRL(reg_idx
),
1769 IXGBE_DCA_RXCTRL_DESC_RRO_EN
|
1770 IXGBE_DCA_RXCTRL_DATA_WRO_EN
);
1773 /* reset head and tail pointers */
1774 IXGBE_WRITE_REG(hw
, IXGBE_VFRDH(reg_idx
), 0);
1775 IXGBE_WRITE_REG(hw
, IXGBE_VFRDT(reg_idx
), 0);
1776 ring
->tail
= adapter
->io_addr
+ IXGBE_VFRDT(reg_idx
);
1778 /* reset ntu and ntc to place SW in sync with hardwdare */
1779 ring
->next_to_clean
= 0;
1780 ring
->next_to_use
= 0;
1781 ring
->next_to_alloc
= 0;
1783 ixgbevf_configure_srrctl(adapter
, reg_idx
);
1785 /* allow any size packet since we can handle overflow */
1786 rxdctl
&= ~IXGBE_RXDCTL_RLPML_EN
;
1788 rxdctl
|= IXGBE_RXDCTL_ENABLE
| IXGBE_RXDCTL_VME
;
1789 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1791 ixgbevf_rx_desc_queue_enable(adapter
, ring
);
1792 ixgbevf_alloc_rx_buffers(ring
, ixgbevf_desc_unused(ring
));
1796 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1797 * @adapter: board private structure
1799 * Configure the Rx unit of the MAC after a reset.
1801 static void ixgbevf_configure_rx(struct ixgbevf_adapter
*adapter
)
1804 struct ixgbe_hw
*hw
= &adapter
->hw
;
1805 struct net_device
*netdev
= adapter
->netdev
;
1807 ixgbevf_setup_psrtype(adapter
);
1808 if (hw
->mac
.type
>= ixgbe_mac_X550_vf
)
1809 ixgbevf_setup_vfmrqc(adapter
);
1811 /* notify the PF of our intent to use this size of frame */
1812 hw
->mac
.ops
.set_rlpml(hw
, netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
);
1814 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1815 * the Base and Length of the Rx Descriptor Ring
1817 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1818 ixgbevf_configure_rx_ring(adapter
, adapter
->rx_ring
[i
]);
1821 static int ixgbevf_vlan_rx_add_vid(struct net_device
*netdev
,
1822 __be16 proto
, u16 vid
)
1824 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1825 struct ixgbe_hw
*hw
= &adapter
->hw
;
1828 spin_lock_bh(&adapter
->mbx_lock
);
1830 /* add VID to filter table */
1831 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, true);
1833 spin_unlock_bh(&adapter
->mbx_lock
);
1835 /* translate error return types so error makes sense */
1836 if (err
== IXGBE_ERR_MBX
)
1839 if (err
== IXGBE_ERR_INVALID_ARGUMENT
)
1842 set_bit(vid
, adapter
->active_vlans
);
1847 static int ixgbevf_vlan_rx_kill_vid(struct net_device
*netdev
,
1848 __be16 proto
, u16 vid
)
1850 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1851 struct ixgbe_hw
*hw
= &adapter
->hw
;
1854 spin_lock_bh(&adapter
->mbx_lock
);
1856 /* remove VID from filter table */
1857 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, false);
1859 spin_unlock_bh(&adapter
->mbx_lock
);
1861 clear_bit(vid
, adapter
->active_vlans
);
1866 static void ixgbevf_restore_vlan(struct ixgbevf_adapter
*adapter
)
1870 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
1871 ixgbevf_vlan_rx_add_vid(adapter
->netdev
,
1872 htons(ETH_P_8021Q
), vid
);
1875 static int ixgbevf_write_uc_addr_list(struct net_device
*netdev
)
1877 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1878 struct ixgbe_hw
*hw
= &adapter
->hw
;
1881 if ((netdev_uc_count(netdev
)) > 10) {
1882 pr_err("Too many unicast filters - No Space\n");
1886 if (!netdev_uc_empty(netdev
)) {
1887 struct netdev_hw_addr
*ha
;
1889 netdev_for_each_uc_addr(ha
, netdev
) {
1890 hw
->mac
.ops
.set_uc_addr(hw
, ++count
, ha
->addr
);
1894 /* If the list is empty then send message to PF driver to
1895 * clear all MAC VLANs on this VF.
1897 hw
->mac
.ops
.set_uc_addr(hw
, 0, NULL
);
1904 * ixgbevf_set_rx_mode - Multicast and unicast set
1905 * @netdev: network interface device structure
1907 * The set_rx_method entry point is called whenever the multicast address
1908 * list, unicast address list or the network interface flags are updated.
1909 * This routine is responsible for configuring the hardware for proper
1910 * multicast mode and configuring requested unicast filters.
1912 static void ixgbevf_set_rx_mode(struct net_device
*netdev
)
1914 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1915 struct ixgbe_hw
*hw
= &adapter
->hw
;
1916 unsigned int flags
= netdev
->flags
;
1919 xcast_mode
= (flags
& IFF_ALLMULTI
) ? IXGBEVF_XCAST_MODE_ALLMULTI
:
1920 (flags
& (IFF_BROADCAST
| IFF_MULTICAST
)) ?
1921 IXGBEVF_XCAST_MODE_MULTI
: IXGBEVF_XCAST_MODE_NONE
;
1923 spin_lock_bh(&adapter
->mbx_lock
);
1925 hw
->mac
.ops
.update_xcast_mode(hw
, xcast_mode
);
1927 /* reprogram multicast list */
1928 hw
->mac
.ops
.update_mc_addr_list(hw
, netdev
);
1930 ixgbevf_write_uc_addr_list(netdev
);
1932 spin_unlock_bh(&adapter
->mbx_lock
);
1935 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter
*adapter
)
1938 struct ixgbevf_q_vector
*q_vector
;
1939 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1941 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1942 q_vector
= adapter
->q_vector
[q_idx
];
1943 #ifdef CONFIG_NET_RX_BUSY_POLL
1944 ixgbevf_qv_init_lock(adapter
->q_vector
[q_idx
]);
1946 napi_enable(&q_vector
->napi
);
1950 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter
*adapter
)
1953 struct ixgbevf_q_vector
*q_vector
;
1954 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1956 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1957 q_vector
= adapter
->q_vector
[q_idx
];
1958 napi_disable(&q_vector
->napi
);
1959 #ifdef CONFIG_NET_RX_BUSY_POLL
1960 while (!ixgbevf_qv_disable(adapter
->q_vector
[q_idx
])) {
1961 pr_info("QV %d locked\n", q_idx
);
1962 usleep_range(1000, 20000);
1964 #endif /* CONFIG_NET_RX_BUSY_POLL */
1968 static int ixgbevf_configure_dcb(struct ixgbevf_adapter
*adapter
)
1970 struct ixgbe_hw
*hw
= &adapter
->hw
;
1971 unsigned int def_q
= 0;
1972 unsigned int num_tcs
= 0;
1973 unsigned int num_rx_queues
= adapter
->num_rx_queues
;
1974 unsigned int num_tx_queues
= adapter
->num_tx_queues
;
1977 spin_lock_bh(&adapter
->mbx_lock
);
1979 /* fetch queue configuration from the PF */
1980 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
1982 spin_unlock_bh(&adapter
->mbx_lock
);
1988 /* we need only one Tx queue */
1991 /* update default Tx ring register index */
1992 adapter
->tx_ring
[0]->reg_idx
= def_q
;
1994 /* we need as many queues as traffic classes */
1995 num_rx_queues
= num_tcs
;
1998 /* if we have a bad config abort request queue reset */
1999 if ((adapter
->num_rx_queues
!= num_rx_queues
) ||
2000 (adapter
->num_tx_queues
!= num_tx_queues
)) {
2001 /* force mailbox timeout to prevent further messages */
2002 hw
->mbx
.timeout
= 0;
2004 /* wait for watchdog to come around and bail us out */
2005 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED
, &adapter
->state
);
2011 static void ixgbevf_configure(struct ixgbevf_adapter
*adapter
)
2013 ixgbevf_configure_dcb(adapter
);
2015 ixgbevf_set_rx_mode(adapter
->netdev
);
2017 ixgbevf_restore_vlan(adapter
);
2019 ixgbevf_configure_tx(adapter
);
2020 ixgbevf_configure_rx(adapter
);
2023 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter
*adapter
)
2025 /* Only save pre-reset stats if there are some */
2026 if (adapter
->stats
.vfgprc
|| adapter
->stats
.vfgptc
) {
2027 adapter
->stats
.saved_reset_vfgprc
+= adapter
->stats
.vfgprc
-
2028 adapter
->stats
.base_vfgprc
;
2029 adapter
->stats
.saved_reset_vfgptc
+= adapter
->stats
.vfgptc
-
2030 adapter
->stats
.base_vfgptc
;
2031 adapter
->stats
.saved_reset_vfgorc
+= adapter
->stats
.vfgorc
-
2032 adapter
->stats
.base_vfgorc
;
2033 adapter
->stats
.saved_reset_vfgotc
+= adapter
->stats
.vfgotc
-
2034 adapter
->stats
.base_vfgotc
;
2035 adapter
->stats
.saved_reset_vfmprc
+= adapter
->stats
.vfmprc
-
2036 adapter
->stats
.base_vfmprc
;
2040 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter
*adapter
)
2042 struct ixgbe_hw
*hw
= &adapter
->hw
;
2044 adapter
->stats
.last_vfgprc
= IXGBE_READ_REG(hw
, IXGBE_VFGPRC
);
2045 adapter
->stats
.last_vfgorc
= IXGBE_READ_REG(hw
, IXGBE_VFGORC_LSB
);
2046 adapter
->stats
.last_vfgorc
|=
2047 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGORC_MSB
))) << 32);
2048 adapter
->stats
.last_vfgptc
= IXGBE_READ_REG(hw
, IXGBE_VFGPTC
);
2049 adapter
->stats
.last_vfgotc
= IXGBE_READ_REG(hw
, IXGBE_VFGOTC_LSB
);
2050 adapter
->stats
.last_vfgotc
|=
2051 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGOTC_MSB
))) << 32);
2052 adapter
->stats
.last_vfmprc
= IXGBE_READ_REG(hw
, IXGBE_VFMPRC
);
2054 adapter
->stats
.base_vfgprc
= adapter
->stats
.last_vfgprc
;
2055 adapter
->stats
.base_vfgorc
= adapter
->stats
.last_vfgorc
;
2056 adapter
->stats
.base_vfgptc
= adapter
->stats
.last_vfgptc
;
2057 adapter
->stats
.base_vfgotc
= adapter
->stats
.last_vfgotc
;
2058 adapter
->stats
.base_vfmprc
= adapter
->stats
.last_vfmprc
;
2061 static void ixgbevf_negotiate_api(struct ixgbevf_adapter
*adapter
)
2063 struct ixgbe_hw
*hw
= &adapter
->hw
;
2064 int api
[] = { ixgbe_mbox_api_12
,
2067 ixgbe_mbox_api_unknown
};
2070 spin_lock_bh(&adapter
->mbx_lock
);
2072 while (api
[idx
] != ixgbe_mbox_api_unknown
) {
2073 err
= hw
->mac
.ops
.negotiate_api_version(hw
, api
[idx
]);
2079 spin_unlock_bh(&adapter
->mbx_lock
);
2082 static void ixgbevf_up_complete(struct ixgbevf_adapter
*adapter
)
2084 struct net_device
*netdev
= adapter
->netdev
;
2085 struct ixgbe_hw
*hw
= &adapter
->hw
;
2087 ixgbevf_configure_msix(adapter
);
2089 spin_lock_bh(&adapter
->mbx_lock
);
2091 if (is_valid_ether_addr(hw
->mac
.addr
))
2092 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.addr
, 0);
2094 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.perm_addr
, 0);
2096 spin_unlock_bh(&adapter
->mbx_lock
);
2098 smp_mb__before_atomic();
2099 clear_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2100 ixgbevf_napi_enable_all(adapter
);
2102 /* clear any pending interrupts, may auto mask */
2103 IXGBE_READ_REG(hw
, IXGBE_VTEICR
);
2104 ixgbevf_irq_enable(adapter
);
2106 /* enable transmits */
2107 netif_tx_start_all_queues(netdev
);
2109 ixgbevf_save_reset_stats(adapter
);
2110 ixgbevf_init_last_counter_stats(adapter
);
2112 hw
->mac
.get_link_status
= 1;
2113 mod_timer(&adapter
->service_timer
, jiffies
);
2116 void ixgbevf_up(struct ixgbevf_adapter
*adapter
)
2118 ixgbevf_configure(adapter
);
2120 ixgbevf_up_complete(adapter
);
2124 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2125 * @rx_ring: ring to free buffers from
2127 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring
*rx_ring
)
2129 struct device
*dev
= rx_ring
->dev
;
2133 /* Free Rx ring sk_buff */
2135 dev_kfree_skb(rx_ring
->skb
);
2136 rx_ring
->skb
= NULL
;
2139 /* ring already cleared, nothing to do */
2140 if (!rx_ring
->rx_buffer_info
)
2143 /* Free all the Rx ring pages */
2144 for (i
= 0; i
< rx_ring
->count
; i
++) {
2145 struct ixgbevf_rx_buffer
*rx_buffer
;
2147 rx_buffer
= &rx_ring
->rx_buffer_info
[i
];
2149 dma_unmap_page(dev
, rx_buffer
->dma
,
2150 PAGE_SIZE
, DMA_FROM_DEVICE
);
2152 if (rx_buffer
->page
)
2153 __free_page(rx_buffer
->page
);
2154 rx_buffer
->page
= NULL
;
2157 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
2158 memset(rx_ring
->rx_buffer_info
, 0, size
);
2160 /* Zero out the descriptor ring */
2161 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2165 * ixgbevf_clean_tx_ring - Free Tx Buffers
2166 * @tx_ring: ring to be cleaned
2168 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring
*tx_ring
)
2170 struct ixgbevf_tx_buffer
*tx_buffer_info
;
2174 if (!tx_ring
->tx_buffer_info
)
2177 /* Free all the Tx ring sk_buffs */
2178 for (i
= 0; i
< tx_ring
->count
; i
++) {
2179 tx_buffer_info
= &tx_ring
->tx_buffer_info
[i
];
2180 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer_info
);
2183 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2184 memset(tx_ring
->tx_buffer_info
, 0, size
);
2186 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2190 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2191 * @adapter: board private structure
2193 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter
*adapter
)
2197 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2198 ixgbevf_clean_rx_ring(adapter
->rx_ring
[i
]);
2202 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2203 * @adapter: board private structure
2205 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter
*adapter
)
2209 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2210 ixgbevf_clean_tx_ring(adapter
->tx_ring
[i
]);
2213 void ixgbevf_down(struct ixgbevf_adapter
*adapter
)
2215 struct net_device
*netdev
= adapter
->netdev
;
2216 struct ixgbe_hw
*hw
= &adapter
->hw
;
2219 /* signal that we are down to the interrupt handler */
2220 if (test_and_set_bit(__IXGBEVF_DOWN
, &adapter
->state
))
2221 return; /* do nothing if already down */
2223 /* disable all enabled Rx queues */
2224 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2225 ixgbevf_disable_rx_queue(adapter
, adapter
->rx_ring
[i
]);
2227 usleep_range(10000, 20000);
2229 netif_tx_stop_all_queues(netdev
);
2231 /* call carrier off first to avoid false dev_watchdog timeouts */
2232 netif_carrier_off(netdev
);
2233 netif_tx_disable(netdev
);
2235 ixgbevf_irq_disable(adapter
);
2237 ixgbevf_napi_disable_all(adapter
);
2239 del_timer_sync(&adapter
->service_timer
);
2241 /* disable transmits in the hardware now that interrupts are off */
2242 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2243 u8 reg_idx
= adapter
->tx_ring
[i
]->reg_idx
;
2245 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
),
2246 IXGBE_TXDCTL_SWFLSH
);
2249 if (!pci_channel_offline(adapter
->pdev
))
2250 ixgbevf_reset(adapter
);
2252 ixgbevf_clean_all_tx_rings(adapter
);
2253 ixgbevf_clean_all_rx_rings(adapter
);
2256 void ixgbevf_reinit_locked(struct ixgbevf_adapter
*adapter
)
2258 WARN_ON(in_interrupt());
2260 while (test_and_set_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2263 ixgbevf_down(adapter
);
2264 ixgbevf_up(adapter
);
2266 clear_bit(__IXGBEVF_RESETTING
, &adapter
->state
);
2269 void ixgbevf_reset(struct ixgbevf_adapter
*adapter
)
2271 struct ixgbe_hw
*hw
= &adapter
->hw
;
2272 struct net_device
*netdev
= adapter
->netdev
;
2274 if (hw
->mac
.ops
.reset_hw(hw
)) {
2275 hw_dbg(hw
, "PF still resetting\n");
2277 hw
->mac
.ops
.init_hw(hw
);
2278 ixgbevf_negotiate_api(adapter
);
2281 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
2282 ether_addr_copy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
);
2283 ether_addr_copy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
);
2286 adapter
->last_reset
= jiffies
;
2289 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter
*adapter
,
2292 int vector_threshold
;
2294 /* We'll want at least 2 (vector_threshold):
2295 * 1) TxQ[0] + RxQ[0] handler
2296 * 2) Other (Link Status Change, etc.)
2298 vector_threshold
= MIN_MSIX_COUNT
;
2300 /* The more we get, the more we will assign to Tx/Rx Cleanup
2301 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2302 * Right now, we simply care about how many we'll get; we'll
2303 * set them up later while requesting irq's.
2305 vectors
= pci_enable_msix_range(adapter
->pdev
, adapter
->msix_entries
,
2306 vector_threshold
, vectors
);
2309 dev_err(&adapter
->pdev
->dev
,
2310 "Unable to allocate MSI-X interrupts\n");
2311 kfree(adapter
->msix_entries
);
2312 adapter
->msix_entries
= NULL
;
2316 /* Adjust for only the vectors we'll use, which is minimum
2317 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2318 * vectors we were allocated.
2320 adapter
->num_msix_vectors
= vectors
;
2326 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2327 * @adapter: board private structure to initialize
2329 * This is the top level queue allocation routine. The order here is very
2330 * important, starting with the "most" number of features turned on at once,
2331 * and ending with the smallest set of features. This way large combinations
2332 * can be allocated if they're turned on, and smaller combinations are the
2333 * fallthrough conditions.
2336 static void ixgbevf_set_num_queues(struct ixgbevf_adapter
*adapter
)
2338 struct ixgbe_hw
*hw
= &adapter
->hw
;
2339 unsigned int def_q
= 0;
2340 unsigned int num_tcs
= 0;
2343 /* Start with base case */
2344 adapter
->num_rx_queues
= 1;
2345 adapter
->num_tx_queues
= 1;
2347 spin_lock_bh(&adapter
->mbx_lock
);
2349 /* fetch queue configuration from the PF */
2350 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
2352 spin_unlock_bh(&adapter
->mbx_lock
);
2357 /* we need as many queues as traffic classes */
2359 adapter
->num_rx_queues
= num_tcs
;
2361 u16 rss
= min_t(u16
, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES
);
2363 switch (hw
->api_version
) {
2364 case ixgbe_mbox_api_11
:
2365 case ixgbe_mbox_api_12
:
2366 adapter
->num_rx_queues
= rss
;
2367 adapter
->num_tx_queues
= rss
;
2375 * ixgbevf_alloc_queues - Allocate memory for all rings
2376 * @adapter: board private structure to initialize
2378 * We allocate one ring per queue at run-time since we don't know the
2379 * number of queues at compile-time. The polling_netdev array is
2380 * intended for Multiqueue, but should work fine with a single queue.
2382 static int ixgbevf_alloc_queues(struct ixgbevf_adapter
*adapter
)
2384 struct ixgbevf_ring
*ring
;
2387 for (; tx
< adapter
->num_tx_queues
; tx
++) {
2388 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2390 goto err_allocation
;
2392 ring
->dev
= &adapter
->pdev
->dev
;
2393 ring
->netdev
= adapter
->netdev
;
2394 ring
->count
= adapter
->tx_ring_count
;
2395 ring
->queue_index
= tx
;
2398 adapter
->tx_ring
[tx
] = ring
;
2401 for (; rx
< adapter
->num_rx_queues
; rx
++) {
2402 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2404 goto err_allocation
;
2406 ring
->dev
= &adapter
->pdev
->dev
;
2407 ring
->netdev
= adapter
->netdev
;
2409 ring
->count
= adapter
->rx_ring_count
;
2410 ring
->queue_index
= rx
;
2413 adapter
->rx_ring
[rx
] = ring
;
2420 kfree(adapter
->tx_ring
[--tx
]);
2421 adapter
->tx_ring
[tx
] = NULL
;
2425 kfree(adapter
->rx_ring
[--rx
]);
2426 adapter
->rx_ring
[rx
] = NULL
;
2432 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2433 * @adapter: board private structure to initialize
2435 * Attempt to configure the interrupts using the best available
2436 * capabilities of the hardware and the kernel.
2438 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2440 struct net_device
*netdev
= adapter
->netdev
;
2442 int vector
, v_budget
;
2444 /* It's easy to be greedy for MSI-X vectors, but it really
2445 * doesn't do us much good if we have a lot more vectors
2446 * than CPU's. So let's be conservative and only ask for
2447 * (roughly) the same number of vectors as there are CPU's.
2448 * The default is to use pairs of vectors.
2450 v_budget
= max(adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2451 v_budget
= min_t(int, v_budget
, num_online_cpus());
2452 v_budget
+= NON_Q_VECTORS
;
2454 /* A failure in MSI-X entry allocation isn't fatal, but it does
2455 * mean we disable MSI-X capabilities of the adapter.
2457 adapter
->msix_entries
= kcalloc(v_budget
,
2458 sizeof(struct msix_entry
), GFP_KERNEL
);
2459 if (!adapter
->msix_entries
)
2462 for (vector
= 0; vector
< v_budget
; vector
++)
2463 adapter
->msix_entries
[vector
].entry
= vector
;
2465 err
= ixgbevf_acquire_msix_vectors(adapter
, v_budget
);
2469 err
= netif_set_real_num_tx_queues(netdev
, adapter
->num_tx_queues
);
2473 return netif_set_real_num_rx_queues(netdev
, adapter
->num_rx_queues
);
2477 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2478 * @adapter: board private structure to initialize
2480 * We allocate one q_vector per queue interrupt. If allocation fails we
2483 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter
*adapter
)
2485 int q_idx
, num_q_vectors
;
2486 struct ixgbevf_q_vector
*q_vector
;
2488 num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2490 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2491 q_vector
= kzalloc(sizeof(struct ixgbevf_q_vector
), GFP_KERNEL
);
2494 q_vector
->adapter
= adapter
;
2495 q_vector
->v_idx
= q_idx
;
2496 netif_napi_add(adapter
->netdev
, &q_vector
->napi
,
2498 adapter
->q_vector
[q_idx
] = q_vector
;
2506 q_vector
= adapter
->q_vector
[q_idx
];
2507 #ifdef CONFIG_NET_RX_BUSY_POLL
2508 napi_hash_del(&q_vector
->napi
);
2510 netif_napi_del(&q_vector
->napi
);
2512 adapter
->q_vector
[q_idx
] = NULL
;
2518 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2519 * @adapter: board private structure to initialize
2521 * This function frees the memory allocated to the q_vectors. In addition if
2522 * NAPI is enabled it will delete any references to the NAPI struct prior
2523 * to freeing the q_vector.
2525 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter
*adapter
)
2527 int q_idx
, num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2529 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2530 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[q_idx
];
2532 adapter
->q_vector
[q_idx
] = NULL
;
2533 #ifdef CONFIG_NET_RX_BUSY_POLL
2534 napi_hash_del(&q_vector
->napi
);
2536 netif_napi_del(&q_vector
->napi
);
2542 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2543 * @adapter: board private structure
2546 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2548 pci_disable_msix(adapter
->pdev
);
2549 kfree(adapter
->msix_entries
);
2550 adapter
->msix_entries
= NULL
;
2554 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2555 * @adapter: board private structure to initialize
2558 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2562 /* Number of supported queues */
2563 ixgbevf_set_num_queues(adapter
);
2565 err
= ixgbevf_set_interrupt_capability(adapter
);
2567 hw_dbg(&adapter
->hw
,
2568 "Unable to setup interrupt capabilities\n");
2569 goto err_set_interrupt
;
2572 err
= ixgbevf_alloc_q_vectors(adapter
);
2574 hw_dbg(&adapter
->hw
, "Unable to allocate memory for queue vectors\n");
2575 goto err_alloc_q_vectors
;
2578 err
= ixgbevf_alloc_queues(adapter
);
2580 pr_err("Unable to allocate memory for queues\n");
2581 goto err_alloc_queues
;
2584 hw_dbg(&adapter
->hw
, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
2585 (adapter
->num_rx_queues
> 1) ? "Enabled" :
2586 "Disabled", adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2588 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2592 ixgbevf_free_q_vectors(adapter
);
2593 err_alloc_q_vectors
:
2594 ixgbevf_reset_interrupt_capability(adapter
);
2600 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2601 * @adapter: board private structure to clear interrupt scheme on
2603 * We go through and clear interrupt specific resources and reset the structure
2604 * to pre-load conditions
2606 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2610 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2611 kfree(adapter
->tx_ring
[i
]);
2612 adapter
->tx_ring
[i
] = NULL
;
2614 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2615 kfree(adapter
->rx_ring
[i
]);
2616 adapter
->rx_ring
[i
] = NULL
;
2619 adapter
->num_tx_queues
= 0;
2620 adapter
->num_rx_queues
= 0;
2622 ixgbevf_free_q_vectors(adapter
);
2623 ixgbevf_reset_interrupt_capability(adapter
);
2627 * ixgbevf_sw_init - Initialize general software structures
2628 * @adapter: board private structure to initialize
2630 * ixgbevf_sw_init initializes the Adapter private data structure.
2631 * Fields are initialized based on PCI device information and
2632 * OS network device settings (MTU size).
2634 static int ixgbevf_sw_init(struct ixgbevf_adapter
*adapter
)
2636 struct ixgbe_hw
*hw
= &adapter
->hw
;
2637 struct pci_dev
*pdev
= adapter
->pdev
;
2638 struct net_device
*netdev
= adapter
->netdev
;
2641 /* PCI config space info */
2642 hw
->vendor_id
= pdev
->vendor
;
2643 hw
->device_id
= pdev
->device
;
2644 hw
->revision_id
= pdev
->revision
;
2645 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2646 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2648 hw
->mbx
.ops
.init_params(hw
);
2650 /* assume legacy case in which PF would only give VF 2 queues */
2651 hw
->mac
.max_tx_queues
= 2;
2652 hw
->mac
.max_rx_queues
= 2;
2654 /* lock to protect mailbox accesses */
2655 spin_lock_init(&adapter
->mbx_lock
);
2657 err
= hw
->mac
.ops
.reset_hw(hw
);
2659 dev_info(&pdev
->dev
,
2660 "PF still in reset state. Is the PF interface up?\n");
2662 err
= hw
->mac
.ops
.init_hw(hw
);
2664 pr_err("init_shared_code failed: %d\n", err
);
2667 ixgbevf_negotiate_api(adapter
);
2668 err
= hw
->mac
.ops
.get_mac_addr(hw
, hw
->mac
.addr
);
2670 dev_info(&pdev
->dev
, "Error reading MAC address\n");
2671 else if (is_zero_ether_addr(adapter
->hw
.mac
.addr
))
2672 dev_info(&pdev
->dev
,
2673 "MAC address not assigned by administrator.\n");
2674 ether_addr_copy(netdev
->dev_addr
, hw
->mac
.addr
);
2677 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
2678 dev_info(&pdev
->dev
, "Assigning random MAC address\n");
2679 eth_hw_addr_random(netdev
);
2680 ether_addr_copy(hw
->mac
.addr
, netdev
->dev_addr
);
2681 ether_addr_copy(hw
->mac
.perm_addr
, netdev
->dev_addr
);
2684 /* Enable dynamic interrupt throttling rates */
2685 adapter
->rx_itr_setting
= 1;
2686 adapter
->tx_itr_setting
= 1;
2688 /* set default ring sizes */
2689 adapter
->tx_ring_count
= IXGBEVF_DEFAULT_TXD
;
2690 adapter
->rx_ring_count
= IXGBEVF_DEFAULT_RXD
;
2692 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2699 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2701 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2702 if (current_counter < last_counter) \
2703 counter += 0x100000000LL; \
2704 last_counter = current_counter; \
2705 counter &= 0xFFFFFFFF00000000LL; \
2706 counter |= current_counter; \
2709 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2711 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2712 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2713 u64 current_counter = (current_counter_msb << 32) | \
2714 current_counter_lsb; \
2715 if (current_counter < last_counter) \
2716 counter += 0x1000000000LL; \
2717 last_counter = current_counter; \
2718 counter &= 0xFFFFFFF000000000LL; \
2719 counter |= current_counter; \
2722 * ixgbevf_update_stats - Update the board statistics counters.
2723 * @adapter: board private structure
2725 void ixgbevf_update_stats(struct ixgbevf_adapter
*adapter
)
2727 struct ixgbe_hw
*hw
= &adapter
->hw
;
2730 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2731 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2734 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC
, adapter
->stats
.last_vfgprc
,
2735 adapter
->stats
.vfgprc
);
2736 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC
, adapter
->stats
.last_vfgptc
,
2737 adapter
->stats
.vfgptc
);
2738 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB
, IXGBE_VFGORC_MSB
,
2739 adapter
->stats
.last_vfgorc
,
2740 adapter
->stats
.vfgorc
);
2741 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB
, IXGBE_VFGOTC_MSB
,
2742 adapter
->stats
.last_vfgotc
,
2743 adapter
->stats
.vfgotc
);
2744 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC
, adapter
->stats
.last_vfmprc
,
2745 adapter
->stats
.vfmprc
);
2747 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2748 adapter
->hw_csum_rx_error
+=
2749 adapter
->rx_ring
[i
]->hw_csum_rx_error
;
2750 adapter
->rx_ring
[i
]->hw_csum_rx_error
= 0;
2755 * ixgbevf_service_timer - Timer Call-back
2756 * @data: pointer to adapter cast into an unsigned long
2758 static void ixgbevf_service_timer(unsigned long data
)
2760 struct ixgbevf_adapter
*adapter
= (struct ixgbevf_adapter
*)data
;
2762 /* Reset the timer */
2763 mod_timer(&adapter
->service_timer
, (HZ
* 2) + jiffies
);
2765 ixgbevf_service_event_schedule(adapter
);
2768 static void ixgbevf_reset_subtask(struct ixgbevf_adapter
*adapter
)
2770 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
))
2773 /* If we're already down or resetting, just bail */
2774 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2775 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2778 adapter
->tx_timeout_count
++;
2780 ixgbevf_reinit_locked(adapter
);
2784 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
2785 * @adapter: pointer to the device adapter structure
2787 * This function serves two purposes. First it strobes the interrupt lines
2788 * in order to make certain interrupts are occurring. Secondly it sets the
2789 * bits needed to check for TX hangs. As a result we should immediately
2790 * determine if a hang has occurred.
2792 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter
*adapter
)
2794 struct ixgbe_hw
*hw
= &adapter
->hw
;
2798 /* If we're down or resetting, just bail */
2799 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2800 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2803 /* Force detection of hung controller */
2804 if (netif_carrier_ok(adapter
->netdev
)) {
2805 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2806 set_check_for_tx_hang(adapter
->tx_ring
[i
]);
2809 /* get one bit for every active Tx/Rx interrupt vector */
2810 for (i
= 0; i
< adapter
->num_msix_vectors
- NON_Q_VECTORS
; i
++) {
2811 struct ixgbevf_q_vector
*qv
= adapter
->q_vector
[i
];
2813 if (qv
->rx
.ring
|| qv
->tx
.ring
)
2817 /* Cause software interrupt to ensure rings are cleaned */
2818 IXGBE_WRITE_REG(hw
, IXGBE_VTEICS
, eics
);
2822 * ixgbevf_watchdog_update_link - update the link status
2823 * @adapter: pointer to the device adapter structure
2825 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter
*adapter
)
2827 struct ixgbe_hw
*hw
= &adapter
->hw
;
2828 u32 link_speed
= adapter
->link_speed
;
2829 bool link_up
= adapter
->link_up
;
2832 spin_lock_bh(&adapter
->mbx_lock
);
2834 err
= hw
->mac
.ops
.check_link(hw
, &link_speed
, &link_up
, false);
2836 spin_unlock_bh(&adapter
->mbx_lock
);
2838 /* if check for link returns error we will need to reset */
2839 if (err
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
))) {
2840 set_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
);
2844 adapter
->link_up
= link_up
;
2845 adapter
->link_speed
= link_speed
;
2849 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
2850 * print link up message
2851 * @adapter: pointer to the device adapter structure
2853 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter
*adapter
)
2855 struct net_device
*netdev
= adapter
->netdev
;
2857 /* only continue if link was previously down */
2858 if (netif_carrier_ok(netdev
))
2861 dev_info(&adapter
->pdev
->dev
, "NIC Link is Up %s\n",
2862 (adapter
->link_speed
== IXGBE_LINK_SPEED_10GB_FULL
) ?
2864 (adapter
->link_speed
== IXGBE_LINK_SPEED_1GB_FULL
) ?
2866 (adapter
->link_speed
== IXGBE_LINK_SPEED_100_FULL
) ?
2870 netif_carrier_on(netdev
);
2874 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
2875 * print link down message
2876 * @adapter: pointer to the adapter structure
2878 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter
*adapter
)
2880 struct net_device
*netdev
= adapter
->netdev
;
2882 adapter
->link_speed
= 0;
2884 /* only continue if link was up previously */
2885 if (!netif_carrier_ok(netdev
))
2888 dev_info(&adapter
->pdev
->dev
, "NIC Link is Down\n");
2890 netif_carrier_off(netdev
);
2894 * ixgbevf_watchdog_subtask - worker thread to bring link up
2895 * @work: pointer to work_struct containing our data
2897 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter
*adapter
)
2899 /* if interface is down do nothing */
2900 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2901 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2904 ixgbevf_watchdog_update_link(adapter
);
2906 if (adapter
->link_up
)
2907 ixgbevf_watchdog_link_is_up(adapter
);
2909 ixgbevf_watchdog_link_is_down(adapter
);
2911 ixgbevf_update_stats(adapter
);
2915 * ixgbevf_service_task - manages and runs subtasks
2916 * @work: pointer to work_struct containing our data
2918 static void ixgbevf_service_task(struct work_struct
*work
)
2920 struct ixgbevf_adapter
*adapter
= container_of(work
,
2921 struct ixgbevf_adapter
,
2923 struct ixgbe_hw
*hw
= &adapter
->hw
;
2925 if (IXGBE_REMOVED(hw
->hw_addr
)) {
2926 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
2928 ixgbevf_down(adapter
);
2934 ixgbevf_queue_reset_subtask(adapter
);
2935 ixgbevf_reset_subtask(adapter
);
2936 ixgbevf_watchdog_subtask(adapter
);
2937 ixgbevf_check_hang_subtask(adapter
);
2939 ixgbevf_service_event_complete(adapter
);
2943 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2944 * @tx_ring: Tx descriptor ring for a specific queue
2946 * Free all transmit software resources
2948 void ixgbevf_free_tx_resources(struct ixgbevf_ring
*tx_ring
)
2950 ixgbevf_clean_tx_ring(tx_ring
);
2952 vfree(tx_ring
->tx_buffer_info
);
2953 tx_ring
->tx_buffer_info
= NULL
;
2955 /* if not set, then don't free */
2959 dma_free_coherent(tx_ring
->dev
, tx_ring
->size
, tx_ring
->desc
,
2962 tx_ring
->desc
= NULL
;
2966 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2967 * @adapter: board private structure
2969 * Free all transmit software resources
2971 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter
*adapter
)
2975 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2976 if (adapter
->tx_ring
[i
]->desc
)
2977 ixgbevf_free_tx_resources(adapter
->tx_ring
[i
]);
2981 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2982 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
2984 * Return 0 on success, negative on failure
2986 int ixgbevf_setup_tx_resources(struct ixgbevf_ring
*tx_ring
)
2990 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2991 tx_ring
->tx_buffer_info
= vzalloc(size
);
2992 if (!tx_ring
->tx_buffer_info
)
2995 /* round up to nearest 4K */
2996 tx_ring
->size
= tx_ring
->count
* sizeof(union ixgbe_adv_tx_desc
);
2997 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
2999 tx_ring
->desc
= dma_alloc_coherent(tx_ring
->dev
, tx_ring
->size
,
3000 &tx_ring
->dma
, GFP_KERNEL
);
3007 vfree(tx_ring
->tx_buffer_info
);
3008 tx_ring
->tx_buffer_info
= NULL
;
3009 hw_dbg(&adapter
->hw
, "Unable to allocate memory for the transmit descriptor ring\n");
3014 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3015 * @adapter: board private structure
3017 * If this function returns with an error, then it's possible one or
3018 * more of the rings is populated (while the rest are not). It is the
3019 * callers duty to clean those orphaned rings.
3021 * Return 0 on success, negative on failure
3023 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter
*adapter
)
3027 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3028 err
= ixgbevf_setup_tx_resources(adapter
->tx_ring
[i
]);
3031 hw_dbg(&adapter
->hw
, "Allocation for Tx Queue %u failed\n", i
);
3039 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3040 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3042 * Returns 0 on success, negative on failure
3044 int ixgbevf_setup_rx_resources(struct ixgbevf_ring
*rx_ring
)
3048 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
3049 rx_ring
->rx_buffer_info
= vzalloc(size
);
3050 if (!rx_ring
->rx_buffer_info
)
3053 /* Round up to nearest 4K */
3054 rx_ring
->size
= rx_ring
->count
* sizeof(union ixgbe_adv_rx_desc
);
3055 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
3057 rx_ring
->desc
= dma_alloc_coherent(rx_ring
->dev
, rx_ring
->size
,
3058 &rx_ring
->dma
, GFP_KERNEL
);
3065 vfree(rx_ring
->rx_buffer_info
);
3066 rx_ring
->rx_buffer_info
= NULL
;
3067 dev_err(rx_ring
->dev
, "Unable to allocate memory for the Rx descriptor ring\n");
3072 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3073 * @adapter: board private structure
3075 * If this function returns with an error, then it's possible one or
3076 * more of the rings is populated (while the rest are not). It is the
3077 * callers duty to clean those orphaned rings.
3079 * Return 0 on success, negative on failure
3081 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3085 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3086 err
= ixgbevf_setup_rx_resources(adapter
->rx_ring
[i
]);
3089 hw_dbg(&adapter
->hw
, "Allocation for Rx Queue %u failed\n", i
);
3096 * ixgbevf_free_rx_resources - Free Rx Resources
3097 * @rx_ring: ring to clean the resources from
3099 * Free all receive software resources
3101 void ixgbevf_free_rx_resources(struct ixgbevf_ring
*rx_ring
)
3103 ixgbevf_clean_rx_ring(rx_ring
);
3105 vfree(rx_ring
->rx_buffer_info
);
3106 rx_ring
->rx_buffer_info
= NULL
;
3108 dma_free_coherent(rx_ring
->dev
, rx_ring
->size
, rx_ring
->desc
,
3111 rx_ring
->desc
= NULL
;
3115 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3116 * @adapter: board private structure
3118 * Free all receive software resources
3120 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3124 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3125 if (adapter
->rx_ring
[i
]->desc
)
3126 ixgbevf_free_rx_resources(adapter
->rx_ring
[i
]);
3130 * ixgbevf_open - Called when a network interface is made active
3131 * @netdev: network interface device structure
3133 * Returns 0 on success, negative value on failure
3135 * The open entry point is called when a network interface is made
3136 * active by the system (IFF_UP). At this point all resources needed
3137 * for transmit and receive operations are allocated, the interrupt
3138 * handler is registered with the OS, the watchdog timer is started,
3139 * and the stack is notified that the interface is ready.
3141 int ixgbevf_open(struct net_device
*netdev
)
3143 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3144 struct ixgbe_hw
*hw
= &adapter
->hw
;
3147 /* A previous failure to open the device because of a lack of
3148 * available MSIX vector resources may have reset the number
3149 * of msix vectors variable to zero. The only way to recover
3150 * is to unload/reload the driver and hope that the system has
3151 * been able to recover some MSIX vector resources.
3153 if (!adapter
->num_msix_vectors
)
3156 if (hw
->adapter_stopped
) {
3157 ixgbevf_reset(adapter
);
3158 /* if adapter is still stopped then PF isn't up and
3159 * the VF can't start.
3161 if (hw
->adapter_stopped
) {
3162 err
= IXGBE_ERR_MBX
;
3163 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3164 goto err_setup_reset
;
3168 /* disallow open during test */
3169 if (test_bit(__IXGBEVF_TESTING
, &adapter
->state
))
3172 netif_carrier_off(netdev
);
3174 /* allocate transmit descriptors */
3175 err
= ixgbevf_setup_all_tx_resources(adapter
);
3179 /* allocate receive descriptors */
3180 err
= ixgbevf_setup_all_rx_resources(adapter
);
3184 ixgbevf_configure(adapter
);
3186 /* Map the Tx/Rx rings to the vectors we were allotted.
3187 * if request_irq will be called in this function map_rings
3188 * must be called *before* up_complete
3190 ixgbevf_map_rings_to_vectors(adapter
);
3192 err
= ixgbevf_request_irq(adapter
);
3196 ixgbevf_up_complete(adapter
);
3201 ixgbevf_down(adapter
);
3203 ixgbevf_free_all_rx_resources(adapter
);
3205 ixgbevf_free_all_tx_resources(adapter
);
3206 ixgbevf_reset(adapter
);
3214 * ixgbevf_close - Disables a network interface
3215 * @netdev: network interface device structure
3217 * Returns 0, this is not allowed to fail
3219 * The close entry point is called when an interface is de-activated
3220 * by the OS. The hardware is still under the drivers control, but
3221 * needs to be disabled. A global MAC reset is issued to stop the
3222 * hardware, and all transmit and receive resources are freed.
3224 int ixgbevf_close(struct net_device
*netdev
)
3226 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3228 ixgbevf_down(adapter
);
3229 ixgbevf_free_irq(adapter
);
3231 ixgbevf_free_all_tx_resources(adapter
);
3232 ixgbevf_free_all_rx_resources(adapter
);
3237 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
)
3239 struct net_device
*dev
= adapter
->netdev
;
3241 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED
,
3245 /* if interface is down do nothing */
3246 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
3247 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
3250 /* Hardware has to reinitialize queues and interrupts to
3251 * match packet buffer alignment. Unfortunately, the
3252 * hardware is not flexible enough to do this dynamically.
3254 if (netif_running(dev
))
3257 ixgbevf_clear_interrupt_scheme(adapter
);
3258 ixgbevf_init_interrupt_scheme(adapter
);
3260 if (netif_running(dev
))
3264 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring
*tx_ring
,
3265 u32 vlan_macip_lens
, u32 type_tucmd
,
3268 struct ixgbe_adv_tx_context_desc
*context_desc
;
3269 u16 i
= tx_ring
->next_to_use
;
3271 context_desc
= IXGBEVF_TX_CTXTDESC(tx_ring
, i
);
3274 tx_ring
->next_to_use
= (i
< tx_ring
->count
) ? i
: 0;
3276 /* set bits to identify this as an advanced context descriptor */
3277 type_tucmd
|= IXGBE_TXD_CMD_DEXT
| IXGBE_ADVTXD_DTYP_CTXT
;
3279 context_desc
->vlan_macip_lens
= cpu_to_le32(vlan_macip_lens
);
3280 context_desc
->seqnum_seed
= 0;
3281 context_desc
->type_tucmd_mlhl
= cpu_to_le32(type_tucmd
);
3282 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
3285 static int ixgbevf_tso(struct ixgbevf_ring
*tx_ring
,
3286 struct ixgbevf_tx_buffer
*first
,
3289 u32 vlan_macip_lens
, type_tucmd
, mss_l4len_idx
;
3290 struct sk_buff
*skb
= first
->skb
;
3300 u32 paylen
, l4_offset
;
3303 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3306 if (!skb_is_gso(skb
))
3309 err
= skb_cow_head(skb
, 0);
3313 ip
.hdr
= skb_network_header(skb
);
3314 l4
.hdr
= skb_checksum_start(skb
);
3316 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3317 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3319 /* initialize outer IP header fields */
3320 if (ip
.v4
->version
== 4) {
3321 /* IP header will have to cancel out any data that
3322 * is not a part of the outer IP header
3324 ip
.v4
->check
= csum_fold(csum_add(lco_csum(skb
),
3325 csum_unfold(l4
.tcp
->check
)));
3326 type_tucmd
|= IXGBE_ADVTXD_TUCMD_IPV4
;
3329 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3330 IXGBE_TX_FLAGS_CSUM
|
3331 IXGBE_TX_FLAGS_IPV4
;
3333 ip
.v6
->payload_len
= 0;
3334 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3335 IXGBE_TX_FLAGS_CSUM
;
3338 /* determine offset of inner transport header */
3339 l4_offset
= l4
.hdr
- skb
->data
;
3341 /* compute length of segmentation header */
3342 *hdr_len
= (l4
.tcp
->doff
* 4) + l4_offset
;
3344 /* remove payload length from inner checksum */
3345 paylen
= skb
->len
- l4_offset
;
3346 csum_replace_by_diff(&l4
.tcp
->check
, htonl(paylen
));
3348 /* update gso size and bytecount with header size */
3349 first
->gso_segs
= skb_shinfo(skb
)->gso_segs
;
3350 first
->bytecount
+= (first
->gso_segs
- 1) * *hdr_len
;
3352 /* mss_l4len_id: use 1 as index for TSO */
3353 mss_l4len_idx
= (*hdr_len
- l4_offset
) << IXGBE_ADVTXD_L4LEN_SHIFT
;
3354 mss_l4len_idx
|= skb_shinfo(skb
)->gso_size
<< IXGBE_ADVTXD_MSS_SHIFT
;
3355 mss_l4len_idx
|= (1u << IXGBE_ADVTXD_IDX_SHIFT
);
3357 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3358 vlan_macip_lens
= l4
.hdr
- ip
.hdr
;
3359 vlan_macip_lens
|= (ip
.hdr
- skb
->data
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3360 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3362 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
,
3363 type_tucmd
, mss_l4len_idx
);
3368 static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff
*skb
)
3370 unsigned int offset
= 0;
3372 ipv6_find_hdr(skb
, &offset
, IPPROTO_SCTP
, NULL
, NULL
);
3374 return offset
== skb_checksum_start_offset(skb
);
3377 static void ixgbevf_tx_csum(struct ixgbevf_ring
*tx_ring
,
3378 struct ixgbevf_tx_buffer
*first
)
3380 struct sk_buff
*skb
= first
->skb
;
3381 u32 vlan_macip_lens
= 0;
3384 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3387 switch (skb
->csum_offset
) {
3388 case offsetof(struct tcphdr
, check
):
3389 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3391 case offsetof(struct udphdr
, check
):
3393 case offsetof(struct sctphdr
, checksum
):
3394 /* validate that this is actually an SCTP request */
3395 if (((first
->protocol
== htons(ETH_P_IP
)) &&
3396 (ip_hdr(skb
)->protocol
== IPPROTO_SCTP
)) ||
3397 ((first
->protocol
== htons(ETH_P_IPV6
)) &&
3398 ixgbevf_ipv6_csum_is_sctp(skb
))) {
3399 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_SCTP
;
3404 skb_checksum_help(skb
);
3407 /* update TX checksum flag */
3408 first
->tx_flags
|= IXGBE_TX_FLAGS_CSUM
;
3409 vlan_macip_lens
= skb_checksum_start_offset(skb
) -
3410 skb_network_offset(skb
);
3412 /* vlan_macip_lens: MACLEN, VLAN tag */
3413 vlan_macip_lens
|= skb_network_offset(skb
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3414 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3416 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
, type_tucmd
, 0);
3419 static __le32
ixgbevf_tx_cmd_type(u32 tx_flags
)
3421 /* set type for advanced descriptor with frame checksum insertion */
3422 __le32 cmd_type
= cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA
|
3423 IXGBE_ADVTXD_DCMD_IFCS
|
3424 IXGBE_ADVTXD_DCMD_DEXT
);
3426 /* set HW VLAN bit if VLAN is present */
3427 if (tx_flags
& IXGBE_TX_FLAGS_VLAN
)
3428 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE
);
3430 /* set segmentation enable bits for TSO/FSO */
3431 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3432 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE
);
3437 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc
*tx_desc
,
3438 u32 tx_flags
, unsigned int paylen
)
3440 __le32 olinfo_status
= cpu_to_le32(paylen
<< IXGBE_ADVTXD_PAYLEN_SHIFT
);
3442 /* enable L4 checksum for TSO and TX checksum offload */
3443 if (tx_flags
& IXGBE_TX_FLAGS_CSUM
)
3444 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM
);
3446 /* enble IPv4 checksum for TSO */
3447 if (tx_flags
& IXGBE_TX_FLAGS_IPV4
)
3448 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM
);
3450 /* use index 1 context for TSO/FSO/FCOE */
3451 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3452 olinfo_status
|= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT
);
3454 /* Check Context must be set if Tx switch is enabled, which it
3455 * always is for case where virtual functions are running
3457 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_CC
);
3459 tx_desc
->read
.olinfo_status
= olinfo_status
;
3462 static void ixgbevf_tx_map(struct ixgbevf_ring
*tx_ring
,
3463 struct ixgbevf_tx_buffer
*first
,
3467 struct sk_buff
*skb
= first
->skb
;
3468 struct ixgbevf_tx_buffer
*tx_buffer
;
3469 union ixgbe_adv_tx_desc
*tx_desc
;
3470 struct skb_frag_struct
*frag
= &skb_shinfo(skb
)->frags
[0];
3471 unsigned int data_len
= skb
->data_len
;
3472 unsigned int size
= skb_headlen(skb
);
3473 unsigned int paylen
= skb
->len
- hdr_len
;
3474 u32 tx_flags
= first
->tx_flags
;
3476 u16 i
= tx_ring
->next_to_use
;
3478 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
3480 ixgbevf_tx_olinfo_status(tx_desc
, tx_flags
, paylen
);
3481 cmd_type
= ixgbevf_tx_cmd_type(tx_flags
);
3483 dma
= dma_map_single(tx_ring
->dev
, skb
->data
, size
, DMA_TO_DEVICE
);
3484 if (dma_mapping_error(tx_ring
->dev
, dma
))
3487 /* record length, and DMA address */
3488 dma_unmap_len_set(first
, len
, size
);
3489 dma_unmap_addr_set(first
, dma
, dma
);
3491 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3494 while (unlikely(size
> IXGBE_MAX_DATA_PER_TXD
)) {
3495 tx_desc
->read
.cmd_type_len
=
3496 cmd_type
| cpu_to_le32(IXGBE_MAX_DATA_PER_TXD
);
3500 if (i
== tx_ring
->count
) {
3501 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3505 dma
+= IXGBE_MAX_DATA_PER_TXD
;
3506 size
-= IXGBE_MAX_DATA_PER_TXD
;
3508 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3509 tx_desc
->read
.olinfo_status
= 0;
3512 if (likely(!data_len
))
3515 tx_desc
->read
.cmd_type_len
= cmd_type
| cpu_to_le32(size
);
3519 if (i
== tx_ring
->count
) {
3520 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3524 size
= skb_frag_size(frag
);
3527 dma
= skb_frag_dma_map(tx_ring
->dev
, frag
, 0, size
,
3529 if (dma_mapping_error(tx_ring
->dev
, dma
))
3532 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3533 dma_unmap_len_set(tx_buffer
, len
, size
);
3534 dma_unmap_addr_set(tx_buffer
, dma
, dma
);
3536 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3537 tx_desc
->read
.olinfo_status
= 0;
3542 /* write last descriptor with RS and EOP bits */
3543 cmd_type
|= cpu_to_le32(size
) | cpu_to_le32(IXGBE_TXD_CMD
);
3544 tx_desc
->read
.cmd_type_len
= cmd_type
;
3546 /* set the timestamp */
3547 first
->time_stamp
= jiffies
;
3549 /* Force memory writes to complete before letting h/w know there
3550 * are new descriptors to fetch. (Only applicable for weak-ordered
3551 * memory model archs, such as IA-64).
3553 * We also need this memory barrier (wmb) to make certain all of the
3554 * status bits have been updated before next_to_watch is written.
3558 /* set next_to_watch value indicating a packet is present */
3559 first
->next_to_watch
= tx_desc
;
3562 if (i
== tx_ring
->count
)
3565 tx_ring
->next_to_use
= i
;
3567 /* notify HW of packet */
3568 ixgbevf_write_tail(tx_ring
, i
);
3572 dev_err(tx_ring
->dev
, "TX DMA map failed\n");
3574 /* clear dma mappings for failed tx_buffer_info map */
3576 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3577 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer
);
3578 if (tx_buffer
== first
)
3585 tx_ring
->next_to_use
= i
;
3588 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3590 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3591 /* Herbert's original patch had:
3592 * smp_mb__after_netif_stop_queue();
3593 * but since that doesn't exist yet, just open code it.
3597 /* We need to check again in a case another CPU has just
3598 * made room available.
3600 if (likely(ixgbevf_desc_unused(tx_ring
) < size
))
3603 /* A reprieve! - use start_queue because it doesn't call schedule */
3604 netif_start_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3605 ++tx_ring
->tx_stats
.restart_queue
;
3610 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3612 if (likely(ixgbevf_desc_unused(tx_ring
) >= size
))
3614 return __ixgbevf_maybe_stop_tx(tx_ring
, size
);
3617 static int ixgbevf_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
3619 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3620 struct ixgbevf_tx_buffer
*first
;
3621 struct ixgbevf_ring
*tx_ring
;
3624 u16 count
= TXD_USE_COUNT(skb_headlen(skb
));
3625 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3629 u8
*dst_mac
= skb_header_pointer(skb
, 0, 0, NULL
);
3631 if (!dst_mac
|| is_link_local_ether_addr(dst_mac
)) {
3632 dev_kfree_skb_any(skb
);
3633 return NETDEV_TX_OK
;
3636 tx_ring
= adapter
->tx_ring
[skb
->queue_mapping
];
3638 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3639 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3640 * + 2 desc gap to keep tail from touching head,
3641 * + 1 desc for context descriptor,
3642 * otherwise try next time
3644 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3645 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++)
3646 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
);
3648 count
+= skb_shinfo(skb
)->nr_frags
;
3650 if (ixgbevf_maybe_stop_tx(tx_ring
, count
+ 3)) {
3651 tx_ring
->tx_stats
.tx_busy
++;
3652 return NETDEV_TX_BUSY
;
3655 /* record the location of the first descriptor for this packet */
3656 first
= &tx_ring
->tx_buffer_info
[tx_ring
->next_to_use
];
3658 first
->bytecount
= skb
->len
;
3659 first
->gso_segs
= 1;
3661 if (skb_vlan_tag_present(skb
)) {
3662 tx_flags
|= skb_vlan_tag_get(skb
);
3663 tx_flags
<<= IXGBE_TX_FLAGS_VLAN_SHIFT
;
3664 tx_flags
|= IXGBE_TX_FLAGS_VLAN
;
3667 /* record initial flags and protocol */
3668 first
->tx_flags
= tx_flags
;
3669 first
->protocol
= vlan_get_protocol(skb
);
3671 tso
= ixgbevf_tso(tx_ring
, first
, &hdr_len
);
3675 ixgbevf_tx_csum(tx_ring
, first
);
3677 ixgbevf_tx_map(tx_ring
, first
, hdr_len
);
3679 ixgbevf_maybe_stop_tx(tx_ring
, DESC_NEEDED
);
3681 return NETDEV_TX_OK
;
3684 dev_kfree_skb_any(first
->skb
);
3687 return NETDEV_TX_OK
;
3691 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3692 * @netdev: network interface device structure
3693 * @p: pointer to an address structure
3695 * Returns 0 on success, negative on failure
3697 static int ixgbevf_set_mac(struct net_device
*netdev
, void *p
)
3699 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3700 struct ixgbe_hw
*hw
= &adapter
->hw
;
3701 struct sockaddr
*addr
= p
;
3704 if (!is_valid_ether_addr(addr
->sa_data
))
3705 return -EADDRNOTAVAIL
;
3707 spin_lock_bh(&adapter
->mbx_lock
);
3709 err
= hw
->mac
.ops
.set_rar(hw
, 0, addr
->sa_data
, 0);
3711 spin_unlock_bh(&adapter
->mbx_lock
);
3716 ether_addr_copy(hw
->mac
.addr
, addr
->sa_data
);
3717 ether_addr_copy(netdev
->dev_addr
, addr
->sa_data
);
3723 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3724 * @netdev: network interface device structure
3725 * @new_mtu: new value for maximum frame size
3727 * Returns 0 on success, negative on failure
3729 static int ixgbevf_change_mtu(struct net_device
*netdev
, int new_mtu
)
3731 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3732 struct ixgbe_hw
*hw
= &adapter
->hw
;
3733 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3734 int max_possible_frame
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3736 switch (adapter
->hw
.api_version
) {
3737 case ixgbe_mbox_api_11
:
3738 case ixgbe_mbox_api_12
:
3739 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3742 if (adapter
->hw
.mac
.type
!= ixgbe_mac_82599_vf
)
3743 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3747 /* MTU < 68 is an error and causes problems on some kernels */
3748 if ((new_mtu
< 68) || (max_frame
> max_possible_frame
))
3751 hw_dbg(hw
, "changing MTU from %d to %d\n",
3752 netdev
->mtu
, new_mtu
);
3753 /* must set new MTU before calling down or up */
3754 netdev
->mtu
= new_mtu
;
3756 /* notify the PF of our intent to use this size of frame */
3757 hw
->mac
.ops
.set_rlpml(hw
, max_frame
);
3762 #ifdef CONFIG_NET_POLL_CONTROLLER
3763 /* Polling 'interrupt' - used by things like netconsole to send skbs
3764 * without having to re-enable interrupts. It's not called while
3765 * the interrupt routine is executing.
3767 static void ixgbevf_netpoll(struct net_device
*netdev
)
3769 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3772 /* if interface is down do nothing */
3773 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
3775 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3776 ixgbevf_msix_clean_rings(0, adapter
->q_vector
[i
]);
3778 #endif /* CONFIG_NET_POLL_CONTROLLER */
3780 static int ixgbevf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
3782 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3783 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3788 netif_device_detach(netdev
);
3790 if (netif_running(netdev
)) {
3792 ixgbevf_down(adapter
);
3793 ixgbevf_free_irq(adapter
);
3794 ixgbevf_free_all_tx_resources(adapter
);
3795 ixgbevf_free_all_rx_resources(adapter
);
3799 ixgbevf_clear_interrupt_scheme(adapter
);
3802 retval
= pci_save_state(pdev
);
3807 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
3808 pci_disable_device(pdev
);
3814 static int ixgbevf_resume(struct pci_dev
*pdev
)
3816 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3817 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3820 pci_restore_state(pdev
);
3821 /* pci_restore_state clears dev->state_saved so call
3822 * pci_save_state to restore it.
3824 pci_save_state(pdev
);
3826 err
= pci_enable_device_mem(pdev
);
3828 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
3831 smp_mb__before_atomic();
3832 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
3833 pci_set_master(pdev
);
3835 ixgbevf_reset(adapter
);
3838 err
= ixgbevf_init_interrupt_scheme(adapter
);
3841 dev_err(&pdev
->dev
, "Cannot initialize interrupts\n");
3845 if (netif_running(netdev
)) {
3846 err
= ixgbevf_open(netdev
);
3851 netif_device_attach(netdev
);
3856 #endif /* CONFIG_PM */
3857 static void ixgbevf_shutdown(struct pci_dev
*pdev
)
3859 ixgbevf_suspend(pdev
, PMSG_SUSPEND
);
3862 static struct rtnl_link_stats64
*ixgbevf_get_stats(struct net_device
*netdev
,
3863 struct rtnl_link_stats64
*stats
)
3865 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3868 const struct ixgbevf_ring
*ring
;
3871 ixgbevf_update_stats(adapter
);
3873 stats
->multicast
= adapter
->stats
.vfmprc
- adapter
->stats
.base_vfmprc
;
3875 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3876 ring
= adapter
->rx_ring
[i
];
3878 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3879 bytes
= ring
->stats
.bytes
;
3880 packets
= ring
->stats
.packets
;
3881 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3882 stats
->rx_bytes
+= bytes
;
3883 stats
->rx_packets
+= packets
;
3886 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3887 ring
= adapter
->tx_ring
[i
];
3889 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3890 bytes
= ring
->stats
.bytes
;
3891 packets
= ring
->stats
.packets
;
3892 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3893 stats
->tx_bytes
+= bytes
;
3894 stats
->tx_packets
+= packets
;
3900 #define IXGBEVF_MAX_MAC_HDR_LEN 127
3901 #define IXGBEVF_MAX_NETWORK_HDR_LEN 511
3903 static netdev_features_t
3904 ixgbevf_features_check(struct sk_buff
*skb
, struct net_device
*dev
,
3905 netdev_features_t features
)
3907 unsigned int network_hdr_len
, mac_hdr_len
;
3909 /* Make certain the headers can be described by a context descriptor */
3910 mac_hdr_len
= skb_network_header(skb
) - skb
->data
;
3911 if (unlikely(mac_hdr_len
> IXGBEVF_MAX_MAC_HDR_LEN
))
3912 return features
& ~(NETIF_F_HW_CSUM
|
3914 NETIF_F_HW_VLAN_CTAG_TX
|
3918 network_hdr_len
= skb_checksum_start(skb
) - skb_network_header(skb
);
3919 if (unlikely(network_hdr_len
> IXGBEVF_MAX_NETWORK_HDR_LEN
))
3920 return features
& ~(NETIF_F_HW_CSUM
|
3925 /* We can only support IPV4 TSO in tunnels if we can mangle the
3926 * inner IP ID field, so strip TSO if MANGLEID is not supported.
3928 if (skb
->encapsulation
&& !(features
& NETIF_F_TSO_MANGLEID
))
3929 features
&= ~NETIF_F_TSO
;
3934 static const struct net_device_ops ixgbevf_netdev_ops
= {
3935 .ndo_open
= ixgbevf_open
,
3936 .ndo_stop
= ixgbevf_close
,
3937 .ndo_start_xmit
= ixgbevf_xmit_frame
,
3938 .ndo_set_rx_mode
= ixgbevf_set_rx_mode
,
3939 .ndo_get_stats64
= ixgbevf_get_stats
,
3940 .ndo_validate_addr
= eth_validate_addr
,
3941 .ndo_set_mac_address
= ixgbevf_set_mac
,
3942 .ndo_change_mtu
= ixgbevf_change_mtu
,
3943 .ndo_tx_timeout
= ixgbevf_tx_timeout
,
3944 .ndo_vlan_rx_add_vid
= ixgbevf_vlan_rx_add_vid
,
3945 .ndo_vlan_rx_kill_vid
= ixgbevf_vlan_rx_kill_vid
,
3946 #ifdef CONFIG_NET_RX_BUSY_POLL
3947 .ndo_busy_poll
= ixgbevf_busy_poll_recv
,
3949 #ifdef CONFIG_NET_POLL_CONTROLLER
3950 .ndo_poll_controller
= ixgbevf_netpoll
,
3952 .ndo_features_check
= ixgbevf_features_check
,
3955 static void ixgbevf_assign_netdev_ops(struct net_device
*dev
)
3957 dev
->netdev_ops
= &ixgbevf_netdev_ops
;
3958 ixgbevf_set_ethtool_ops(dev
);
3959 dev
->watchdog_timeo
= 5 * HZ
;
3963 * ixgbevf_probe - Device Initialization Routine
3964 * @pdev: PCI device information struct
3965 * @ent: entry in ixgbevf_pci_tbl
3967 * Returns 0 on success, negative on failure
3969 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3970 * The OS initialization, configuring of the adapter private structure,
3971 * and a hardware reset occur.
3973 static int ixgbevf_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
3975 struct net_device
*netdev
;
3976 struct ixgbevf_adapter
*adapter
= NULL
;
3977 struct ixgbe_hw
*hw
= NULL
;
3978 const struct ixgbevf_info
*ii
= ixgbevf_info_tbl
[ent
->driver_data
];
3979 int err
, pci_using_dac
;
3980 bool disable_dev
= false;
3982 err
= pci_enable_device(pdev
);
3986 if (!dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64))) {
3989 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
3991 dev_err(&pdev
->dev
, "No usable DMA configuration, aborting\n");
3997 err
= pci_request_regions(pdev
, ixgbevf_driver_name
);
3999 dev_err(&pdev
->dev
, "pci_request_regions failed 0x%x\n", err
);
4003 pci_set_master(pdev
);
4005 netdev
= alloc_etherdev_mq(sizeof(struct ixgbevf_adapter
),
4009 goto err_alloc_etherdev
;
4012 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
4014 adapter
= netdev_priv(netdev
);
4016 adapter
->netdev
= netdev
;
4017 adapter
->pdev
= pdev
;
4020 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
4022 /* call save state here in standalone driver because it relies on
4023 * adapter struct to exist, and needs to call netdev_priv
4025 pci_save_state(pdev
);
4027 hw
->hw_addr
= ioremap(pci_resource_start(pdev
, 0),
4028 pci_resource_len(pdev
, 0));
4029 adapter
->io_addr
= hw
->hw_addr
;
4035 ixgbevf_assign_netdev_ops(netdev
);
4038 memcpy(&hw
->mac
.ops
, ii
->mac_ops
, sizeof(hw
->mac
.ops
));
4039 hw
->mac
.type
= ii
->mac
;
4041 memcpy(&hw
->mbx
.ops
, &ixgbevf_mbx_ops
,
4042 sizeof(struct ixgbe_mbx_operations
));
4044 /* setup the private structure */
4045 err
= ixgbevf_sw_init(adapter
);
4049 /* The HW MAC address was set and/or determined in sw_init */
4050 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
4051 pr_err("invalid MAC address\n");
4056 netdev
->hw_features
= NETIF_F_SG
|
4063 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4064 NETIF_F_GSO_GRE_CSUM | \
4065 NETIF_F_GSO_IPXIP4 | \
4066 NETIF_F_GSO_UDP_TUNNEL | \
4067 NETIF_F_GSO_UDP_TUNNEL_CSUM)
4069 netdev
->gso_partial_features
= IXGBEVF_GSO_PARTIAL_FEATURES
;
4070 netdev
->hw_features
|= NETIF_F_GSO_PARTIAL
|
4071 IXGBEVF_GSO_PARTIAL_FEATURES
;
4073 netdev
->features
= netdev
->hw_features
;
4076 netdev
->features
|= NETIF_F_HIGHDMA
;
4078 netdev
->vlan_features
|= netdev
->features
| NETIF_F_TSO_MANGLEID
;
4079 netdev
->mpls_features
|= NETIF_F_HW_CSUM
;
4080 netdev
->hw_enc_features
|= netdev
->vlan_features
;
4082 /* set this bit last since it cannot be part of vlan_features */
4083 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
|
4084 NETIF_F_HW_VLAN_CTAG_RX
|
4085 NETIF_F_HW_VLAN_CTAG_TX
;
4087 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
4089 if (IXGBE_REMOVED(hw
->hw_addr
)) {
4094 setup_timer(&adapter
->service_timer
, &ixgbevf_service_timer
,
4095 (unsigned long)adapter
);
4097 INIT_WORK(&adapter
->service_task
, ixgbevf_service_task
);
4098 set_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
);
4099 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
4101 err
= ixgbevf_init_interrupt_scheme(adapter
);
4105 strcpy(netdev
->name
, "eth%d");
4107 err
= register_netdev(netdev
);
4111 pci_set_drvdata(pdev
, netdev
);
4112 netif_carrier_off(netdev
);
4114 ixgbevf_init_last_counter_stats(adapter
);
4116 /* print the VF info */
4117 dev_info(&pdev
->dev
, "%pM\n", netdev
->dev_addr
);
4118 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
4120 switch (hw
->mac
.type
) {
4121 case ixgbe_mac_X550_vf
:
4122 dev_info(&pdev
->dev
, "Intel(R) X550 Virtual Function\n");
4124 case ixgbe_mac_X540_vf
:
4125 dev_info(&pdev
->dev
, "Intel(R) X540 Virtual Function\n");
4127 case ixgbe_mac_82599_vf
:
4129 dev_info(&pdev
->dev
, "Intel(R) 82599 Virtual Function\n");
4136 ixgbevf_clear_interrupt_scheme(adapter
);
4138 ixgbevf_reset_interrupt_capability(adapter
);
4139 iounmap(adapter
->io_addr
);
4141 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4142 free_netdev(netdev
);
4144 pci_release_regions(pdev
);
4147 if (!adapter
|| disable_dev
)
4148 pci_disable_device(pdev
);
4153 * ixgbevf_remove - Device Removal Routine
4154 * @pdev: PCI device information struct
4156 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4157 * that it should release a PCI device. The could be caused by a
4158 * Hot-Plug event, or because the driver is going to be removed from
4161 static void ixgbevf_remove(struct pci_dev
*pdev
)
4163 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4164 struct ixgbevf_adapter
*adapter
;
4170 adapter
= netdev_priv(netdev
);
4172 set_bit(__IXGBEVF_REMOVING
, &adapter
->state
);
4173 cancel_work_sync(&adapter
->service_task
);
4175 if (netdev
->reg_state
== NETREG_REGISTERED
)
4176 unregister_netdev(netdev
);
4178 ixgbevf_clear_interrupt_scheme(adapter
);
4179 ixgbevf_reset_interrupt_capability(adapter
);
4181 iounmap(adapter
->io_addr
);
4182 pci_release_regions(pdev
);
4184 hw_dbg(&adapter
->hw
, "Remove complete\n");
4186 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4187 free_netdev(netdev
);
4190 pci_disable_device(pdev
);
4194 * ixgbevf_io_error_detected - called when PCI error is detected
4195 * @pdev: Pointer to PCI device
4196 * @state: The current pci connection state
4198 * This function is called after a PCI bus error affecting
4199 * this device has been detected.
4201 static pci_ers_result_t
ixgbevf_io_error_detected(struct pci_dev
*pdev
,
4202 pci_channel_state_t state
)
4204 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4205 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4207 if (!test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
4208 return PCI_ERS_RESULT_DISCONNECT
;
4211 netif_device_detach(netdev
);
4213 if (state
== pci_channel_io_perm_failure
) {
4215 return PCI_ERS_RESULT_DISCONNECT
;
4218 if (netif_running(netdev
))
4219 ixgbevf_down(adapter
);
4221 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
4222 pci_disable_device(pdev
);
4225 /* Request a slot slot reset. */
4226 return PCI_ERS_RESULT_NEED_RESET
;
4230 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4231 * @pdev: Pointer to PCI device
4233 * Restart the card from scratch, as if from a cold-boot. Implementation
4234 * resembles the first-half of the ixgbevf_resume routine.
4236 static pci_ers_result_t
ixgbevf_io_slot_reset(struct pci_dev
*pdev
)
4238 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4239 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4241 if (pci_enable_device_mem(pdev
)) {
4243 "Cannot re-enable PCI device after reset.\n");
4244 return PCI_ERS_RESULT_DISCONNECT
;
4247 smp_mb__before_atomic();
4248 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4249 pci_set_master(pdev
);
4251 ixgbevf_reset(adapter
);
4253 return PCI_ERS_RESULT_RECOVERED
;
4257 * ixgbevf_io_resume - called when traffic can start flowing again.
4258 * @pdev: Pointer to PCI device
4260 * This callback is called when the error recovery driver tells us that
4261 * its OK to resume normal operation. Implementation resembles the
4262 * second-half of the ixgbevf_resume routine.
4264 static void ixgbevf_io_resume(struct pci_dev
*pdev
)
4266 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4267 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4269 if (netif_running(netdev
))
4270 ixgbevf_up(adapter
);
4272 netif_device_attach(netdev
);
4275 /* PCI Error Recovery (ERS) */
4276 static const struct pci_error_handlers ixgbevf_err_handler
= {
4277 .error_detected
= ixgbevf_io_error_detected
,
4278 .slot_reset
= ixgbevf_io_slot_reset
,
4279 .resume
= ixgbevf_io_resume
,
4282 static struct pci_driver ixgbevf_driver
= {
4283 .name
= ixgbevf_driver_name
,
4284 .id_table
= ixgbevf_pci_tbl
,
4285 .probe
= ixgbevf_probe
,
4286 .remove
= ixgbevf_remove
,
4288 /* Power Management Hooks */
4289 .suspend
= ixgbevf_suspend
,
4290 .resume
= ixgbevf_resume
,
4292 .shutdown
= ixgbevf_shutdown
,
4293 .err_handler
= &ixgbevf_err_handler
4297 * ixgbevf_init_module - Driver Registration Routine
4299 * ixgbevf_init_module is the first routine called when the driver is
4300 * loaded. All it does is register with the PCI subsystem.
4302 static int __init
ixgbevf_init_module(void)
4304 pr_info("%s - version %s\n", ixgbevf_driver_string
,
4305 ixgbevf_driver_version
);
4307 pr_info("%s\n", ixgbevf_copyright
);
4308 ixgbevf_wq
= create_singlethread_workqueue(ixgbevf_driver_name
);
4310 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name
);
4314 return pci_register_driver(&ixgbevf_driver
);
4317 module_init(ixgbevf_init_module
);
4320 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4322 * ixgbevf_exit_module is called just before the driver is removed
4325 static void __exit
ixgbevf_exit_module(void)
4327 pci_unregister_driver(&ixgbevf_driver
);
4329 destroy_workqueue(ixgbevf_wq
);
4336 * ixgbevf_get_hw_dev_name - return device name string
4337 * used by hardware layer to print debugging information
4339 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw
*hw
)
4341 struct ixgbevf_adapter
*adapter
= hw
->back
;
4343 return adapter
->netdev
->name
;
4347 module_exit(ixgbevf_exit_module
);
4349 /* ixgbevf_main.c */