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_X540_vf
] = &ixgbevf_X540_vf_info
,
67 [board_X550_vf
] = &ixgbevf_X550_vf_info
,
68 [board_X550EM_x_vf
] = &ixgbevf_X550EM_x_vf_info
,
71 /* ixgbevf_pci_tbl - PCI Device ID Table
73 * Wildcard entries (PCI_ANY_ID) should come last
74 * Last entry must be all 0s
76 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
77 * Class, Class Mask, private data (not used) }
79 static const struct pci_device_id ixgbevf_pci_tbl
[] = {
80 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_82599_VF
), board_82599_vf
},
81 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X540_VF
), board_X540_vf
},
82 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550_VF
), board_X550_vf
},
83 {PCI_VDEVICE(INTEL
, IXGBE_DEV_ID_X550EM_X_VF
), board_X550EM_x_vf
},
84 /* required last entry */
87 MODULE_DEVICE_TABLE(pci
, ixgbevf_pci_tbl
);
89 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
90 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
91 MODULE_LICENSE("GPL");
92 MODULE_VERSION(DRV_VERSION
);
94 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
95 static int debug
= -1;
96 module_param(debug
, int, 0);
97 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
99 static struct workqueue_struct
*ixgbevf_wq
;
101 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter
*adapter
)
103 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
104 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
) &&
105 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
))
106 queue_work(ixgbevf_wq
, &adapter
->service_task
);
109 static void ixgbevf_service_event_complete(struct ixgbevf_adapter
*adapter
)
111 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
));
113 /* flush memory to make sure state is correct before next watchdog */
114 smp_mb__before_atomic();
115 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
119 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
);
120 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
);
121 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
);
123 static void ixgbevf_remove_adapter(struct ixgbe_hw
*hw
)
125 struct ixgbevf_adapter
*adapter
= hw
->back
;
130 dev_err(&adapter
->pdev
->dev
, "Adapter removed\n");
131 if (test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
132 ixgbevf_service_event_schedule(adapter
);
135 static void ixgbevf_check_remove(struct ixgbe_hw
*hw
, u32 reg
)
139 /* The following check not only optimizes a bit by not
140 * performing a read on the status register when the
141 * register just read was a status register read that
142 * returned IXGBE_FAILED_READ_REG. It also blocks any
143 * potential recursion.
145 if (reg
== IXGBE_VFSTATUS
) {
146 ixgbevf_remove_adapter(hw
);
149 value
= ixgbevf_read_reg(hw
, IXGBE_VFSTATUS
);
150 if (value
== IXGBE_FAILED_READ_REG
)
151 ixgbevf_remove_adapter(hw
);
154 u32
ixgbevf_read_reg(struct ixgbe_hw
*hw
, u32 reg
)
156 u8 __iomem
*reg_addr
= ACCESS_ONCE(hw
->hw_addr
);
159 if (IXGBE_REMOVED(reg_addr
))
160 return IXGBE_FAILED_READ_REG
;
161 value
= readl(reg_addr
+ reg
);
162 if (unlikely(value
== IXGBE_FAILED_READ_REG
))
163 ixgbevf_check_remove(hw
, reg
);
168 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
169 * @adapter: pointer to adapter struct
170 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
171 * @queue: queue to map the corresponding interrupt to
172 * @msix_vector: the vector to map to the corresponding queue
174 static void ixgbevf_set_ivar(struct ixgbevf_adapter
*adapter
, s8 direction
,
175 u8 queue
, u8 msix_vector
)
178 struct ixgbe_hw
*hw
= &adapter
->hw
;
180 if (direction
== -1) {
182 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
183 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR_MISC
);
186 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR_MISC
, ivar
);
188 /* Tx or Rx causes */
189 msix_vector
|= IXGBE_IVAR_ALLOC_VAL
;
190 index
= ((16 * (queue
& 1)) + (8 * direction
));
191 ivar
= IXGBE_READ_REG(hw
, IXGBE_VTIVAR(queue
>> 1));
192 ivar
&= ~(0xFF << index
);
193 ivar
|= (msix_vector
<< index
);
194 IXGBE_WRITE_REG(hw
, IXGBE_VTIVAR(queue
>> 1), ivar
);
198 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring
*tx_ring
,
199 struct ixgbevf_tx_buffer
*tx_buffer
)
201 if (tx_buffer
->skb
) {
202 dev_kfree_skb_any(tx_buffer
->skb
);
203 if (dma_unmap_len(tx_buffer
, len
))
204 dma_unmap_single(tx_ring
->dev
,
205 dma_unmap_addr(tx_buffer
, dma
),
206 dma_unmap_len(tx_buffer
, len
),
208 } else if (dma_unmap_len(tx_buffer
, len
)) {
209 dma_unmap_page(tx_ring
->dev
,
210 dma_unmap_addr(tx_buffer
, dma
),
211 dma_unmap_len(tx_buffer
, len
),
214 tx_buffer
->next_to_watch
= NULL
;
215 tx_buffer
->skb
= NULL
;
216 dma_unmap_len_set(tx_buffer
, len
, 0);
217 /* tx_buffer must be completely set up in the transmit path */
220 static u64
ixgbevf_get_tx_completed(struct ixgbevf_ring
*ring
)
222 return ring
->stats
.packets
;
225 static u32
ixgbevf_get_tx_pending(struct ixgbevf_ring
*ring
)
227 struct ixgbevf_adapter
*adapter
= netdev_priv(ring
->netdev
);
228 struct ixgbe_hw
*hw
= &adapter
->hw
;
230 u32 head
= IXGBE_READ_REG(hw
, IXGBE_VFTDH(ring
->reg_idx
));
231 u32 tail
= IXGBE_READ_REG(hw
, IXGBE_VFTDT(ring
->reg_idx
));
234 return (head
< tail
) ?
235 tail
- head
: (tail
+ ring
->count
- head
);
240 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring
*tx_ring
)
242 u32 tx_done
= ixgbevf_get_tx_completed(tx_ring
);
243 u32 tx_done_old
= tx_ring
->tx_stats
.tx_done_old
;
244 u32 tx_pending
= ixgbevf_get_tx_pending(tx_ring
);
246 clear_check_for_tx_hang(tx_ring
);
248 /* Check for a hung queue, but be thorough. This verifies
249 * that a transmit has been completed since the previous
250 * check AND there is at least one packet pending. The
251 * ARMED bit is set to indicate a potential hang.
253 if ((tx_done_old
== tx_done
) && tx_pending
) {
254 /* make sure it is true for two checks in a row */
255 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED
,
258 /* reset the countdown */
259 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &tx_ring
->state
);
261 /* update completed stats and continue */
262 tx_ring
->tx_stats
.tx_done_old
= tx_done
;
267 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter
*adapter
)
269 /* Do the reset outside of interrupt context */
270 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
271 set_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
);
272 ixgbevf_service_event_schedule(adapter
);
277 * ixgbevf_tx_timeout - Respond to a Tx Hang
278 * @netdev: network interface device structure
280 static void ixgbevf_tx_timeout(struct net_device
*netdev
)
282 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
284 ixgbevf_tx_timeout_reset(adapter
);
288 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
289 * @q_vector: board private structure
290 * @tx_ring: tx ring to clean
292 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector
*q_vector
,
293 struct ixgbevf_ring
*tx_ring
)
295 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
296 struct ixgbevf_tx_buffer
*tx_buffer
;
297 union ixgbe_adv_tx_desc
*tx_desc
;
298 unsigned int total_bytes
= 0, total_packets
= 0;
299 unsigned int budget
= tx_ring
->count
/ 2;
300 unsigned int i
= tx_ring
->next_to_clean
;
302 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
305 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
306 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
310 union ixgbe_adv_tx_desc
*eop_desc
= tx_buffer
->next_to_watch
;
312 /* if next_to_watch is not set then there is no work pending */
316 /* prevent any other reads prior to eop_desc */
317 read_barrier_depends();
319 /* if DD is not set pending work has not been completed */
320 if (!(eop_desc
->wb
.status
& cpu_to_le32(IXGBE_TXD_STAT_DD
)))
323 /* clear next_to_watch to prevent false hangs */
324 tx_buffer
->next_to_watch
= NULL
;
326 /* update the statistics for this packet */
327 total_bytes
+= tx_buffer
->bytecount
;
328 total_packets
+= tx_buffer
->gso_segs
;
331 dev_kfree_skb_any(tx_buffer
->skb
);
333 /* unmap skb header data */
334 dma_unmap_single(tx_ring
->dev
,
335 dma_unmap_addr(tx_buffer
, dma
),
336 dma_unmap_len(tx_buffer
, len
),
339 /* clear tx_buffer data */
340 tx_buffer
->skb
= NULL
;
341 dma_unmap_len_set(tx_buffer
, len
, 0);
343 /* unmap remaining buffers */
344 while (tx_desc
!= eop_desc
) {
350 tx_buffer
= tx_ring
->tx_buffer_info
;
351 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
354 /* unmap any remaining paged data */
355 if (dma_unmap_len(tx_buffer
, len
)) {
356 dma_unmap_page(tx_ring
->dev
,
357 dma_unmap_addr(tx_buffer
, dma
),
358 dma_unmap_len(tx_buffer
, len
),
360 dma_unmap_len_set(tx_buffer
, len
, 0);
364 /* move us one more past the eop_desc for start of next pkt */
370 tx_buffer
= tx_ring
->tx_buffer_info
;
371 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
374 /* issue prefetch for next Tx descriptor */
377 /* update budget accounting */
379 } while (likely(budget
));
382 tx_ring
->next_to_clean
= i
;
383 u64_stats_update_begin(&tx_ring
->syncp
);
384 tx_ring
->stats
.bytes
+= total_bytes
;
385 tx_ring
->stats
.packets
+= total_packets
;
386 u64_stats_update_end(&tx_ring
->syncp
);
387 q_vector
->tx
.total_bytes
+= total_bytes
;
388 q_vector
->tx
.total_packets
+= total_packets
;
390 if (check_for_tx_hang(tx_ring
) && ixgbevf_check_tx_hang(tx_ring
)) {
391 struct ixgbe_hw
*hw
= &adapter
->hw
;
392 union ixgbe_adv_tx_desc
*eop_desc
;
394 eop_desc
= tx_ring
->tx_buffer_info
[i
].next_to_watch
;
396 pr_err("Detected Tx Unit Hang\n"
398 " TDH, TDT <%x>, <%x>\n"
399 " next_to_use <%x>\n"
400 " next_to_clean <%x>\n"
401 "tx_buffer_info[next_to_clean]\n"
402 " next_to_watch <%p>\n"
403 " eop_desc->wb.status <%x>\n"
404 " time_stamp <%lx>\n"
406 tx_ring
->queue_index
,
407 IXGBE_READ_REG(hw
, IXGBE_VFTDH(tx_ring
->reg_idx
)),
408 IXGBE_READ_REG(hw
, IXGBE_VFTDT(tx_ring
->reg_idx
)),
409 tx_ring
->next_to_use
, i
,
410 eop_desc
, (eop_desc
? eop_desc
->wb
.status
: 0),
411 tx_ring
->tx_buffer_info
[i
].time_stamp
, jiffies
);
413 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
415 /* schedule immediate reset if we believe we hung */
416 ixgbevf_tx_timeout_reset(adapter
);
421 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
422 if (unlikely(total_packets
&& netif_carrier_ok(tx_ring
->netdev
) &&
423 (ixgbevf_desc_unused(tx_ring
) >= TX_WAKE_THRESHOLD
))) {
424 /* Make sure that anybody stopping the queue after this
425 * sees the new next_to_clean.
429 if (__netif_subqueue_stopped(tx_ring
->netdev
,
430 tx_ring
->queue_index
) &&
431 !test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
432 netif_wake_subqueue(tx_ring
->netdev
,
433 tx_ring
->queue_index
);
434 ++tx_ring
->tx_stats
.restart_queue
;
442 * ixgbevf_rx_skb - Helper function to determine proper Rx method
443 * @q_vector: structure containing interrupt and ring information
444 * @skb: packet to send up
446 static void ixgbevf_rx_skb(struct ixgbevf_q_vector
*q_vector
,
449 #ifdef CONFIG_NET_RX_BUSY_POLL
450 skb_mark_napi_id(skb
, &q_vector
->napi
);
452 if (ixgbevf_qv_busy_polling(q_vector
)) {
453 netif_receive_skb(skb
);
454 /* exit early if we busy polled */
457 #endif /* CONFIG_NET_RX_BUSY_POLL */
459 napi_gro_receive(&q_vector
->napi
, skb
);
462 #define IXGBE_RSS_L4_TYPES_MASK \
463 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
464 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
465 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
466 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
468 static inline void ixgbevf_rx_hash(struct ixgbevf_ring
*ring
,
469 union ixgbe_adv_rx_desc
*rx_desc
,
474 if (!(ring
->netdev
->features
& NETIF_F_RXHASH
))
477 rss_type
= le16_to_cpu(rx_desc
->wb
.lower
.lo_dword
.hs_rss
.pkt_info
) &
478 IXGBE_RXDADV_RSSTYPE_MASK
;
483 skb_set_hash(skb
, le32_to_cpu(rx_desc
->wb
.lower
.hi_dword
.rss
),
484 (IXGBE_RSS_L4_TYPES_MASK
& (1ul << rss_type
)) ?
485 PKT_HASH_TYPE_L4
: PKT_HASH_TYPE_L3
);
489 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
490 * @ring: structure containig ring specific data
491 * @rx_desc: current Rx descriptor being processed
492 * @skb: skb currently being received and modified
494 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring
*ring
,
495 union ixgbe_adv_rx_desc
*rx_desc
,
498 skb_checksum_none_assert(skb
);
500 /* Rx csum disabled */
501 if (!(ring
->netdev
->features
& NETIF_F_RXCSUM
))
504 /* if IP and error */
505 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_IPCS
) &&
506 ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_IPE
)) {
507 ring
->rx_stats
.csum_err
++;
511 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_L4CS
))
514 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXDADV_ERR_TCPE
)) {
515 ring
->rx_stats
.csum_err
++;
519 /* It must be a TCP or UDP packet with a valid checksum */
520 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
524 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
525 * @rx_ring: rx descriptor ring packet is being transacted on
526 * @rx_desc: pointer to the EOP Rx descriptor
527 * @skb: pointer to current skb being populated
529 * This function checks the ring, descriptor, and packet information in
530 * order to populate the checksum, VLAN, protocol, and other fields within
533 static void ixgbevf_process_skb_fields(struct ixgbevf_ring
*rx_ring
,
534 union ixgbe_adv_rx_desc
*rx_desc
,
537 ixgbevf_rx_hash(rx_ring
, rx_desc
, skb
);
538 ixgbevf_rx_checksum(rx_ring
, rx_desc
, skb
);
540 if (ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_VP
)) {
541 u16 vid
= le16_to_cpu(rx_desc
->wb
.upper
.vlan
);
542 unsigned long *active_vlans
= netdev_priv(rx_ring
->netdev
);
544 if (test_bit(vid
& VLAN_VID_MASK
, active_vlans
))
545 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vid
);
548 skb
->protocol
= eth_type_trans(skb
, rx_ring
->netdev
);
552 * ixgbevf_is_non_eop - process handling of non-EOP buffers
553 * @rx_ring: Rx ring being processed
554 * @rx_desc: Rx descriptor for current buffer
555 * @skb: current socket buffer containing buffer in progress
557 * This function updates next to clean. If the buffer is an EOP buffer
558 * this function exits returning false, otherwise it will place the
559 * sk_buff in the next buffer to be chained and return true indicating
560 * that this is in fact a non-EOP buffer.
562 static bool ixgbevf_is_non_eop(struct ixgbevf_ring
*rx_ring
,
563 union ixgbe_adv_rx_desc
*rx_desc
)
565 u32 ntc
= rx_ring
->next_to_clean
+ 1;
567 /* fetch, update, and store next to clean */
568 ntc
= (ntc
< rx_ring
->count
) ? ntc
: 0;
569 rx_ring
->next_to_clean
= ntc
;
571 prefetch(IXGBEVF_RX_DESC(rx_ring
, ntc
));
573 if (likely(ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_EOP
)))
579 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring
*rx_ring
,
580 struct ixgbevf_rx_buffer
*bi
)
582 struct page
*page
= bi
->page
;
583 dma_addr_t dma
= bi
->dma
;
585 /* since we are recycling buffers we should seldom need to alloc */
589 /* alloc new page for storage */
590 page
= dev_alloc_page();
591 if (unlikely(!page
)) {
592 rx_ring
->rx_stats
.alloc_rx_page_failed
++;
596 /* map page for use */
597 dma
= dma_map_page(rx_ring
->dev
, page
, 0,
598 PAGE_SIZE
, DMA_FROM_DEVICE
);
600 /* if mapping failed free memory back to system since
601 * there isn't much point in holding memory we can't use
603 if (dma_mapping_error(rx_ring
->dev
, dma
)) {
606 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
618 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
619 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
620 * @cleaned_count: number of buffers to replace
622 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring
*rx_ring
,
625 union ixgbe_adv_rx_desc
*rx_desc
;
626 struct ixgbevf_rx_buffer
*bi
;
627 unsigned int i
= rx_ring
->next_to_use
;
629 /* nothing to do or no valid netdev defined */
630 if (!cleaned_count
|| !rx_ring
->netdev
)
633 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, i
);
634 bi
= &rx_ring
->rx_buffer_info
[i
];
638 if (!ixgbevf_alloc_mapped_page(rx_ring
, bi
))
641 /* Refresh the desc even if pkt_addr didn't change
642 * because each write-back erases this info.
644 rx_desc
->read
.pkt_addr
= cpu_to_le64(bi
->dma
+ bi
->page_offset
);
650 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, 0);
651 bi
= rx_ring
->rx_buffer_info
;
655 /* clear the hdr_addr for the next_to_use descriptor */
656 rx_desc
->read
.hdr_addr
= 0;
659 } while (cleaned_count
);
663 if (rx_ring
->next_to_use
!= i
) {
664 /* record the next descriptor to use */
665 rx_ring
->next_to_use
= i
;
667 /* update next to alloc since we have filled the ring */
668 rx_ring
->next_to_alloc
= i
;
670 /* Force memory writes to complete before letting h/w
671 * know there are new descriptors to fetch. (Only
672 * applicable for weak-ordered memory model archs,
676 ixgbevf_write_tail(rx_ring
, i
);
681 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
682 * @rx_ring: rx descriptor ring packet is being transacted on
683 * @rx_desc: pointer to the EOP Rx descriptor
684 * @skb: pointer to current skb being fixed
686 * Check for corrupted packet headers caused by senders on the local L2
687 * embedded NIC switch not setting up their Tx Descriptors right. These
688 * should be very rare.
690 * Also address the case where we are pulling data in on pages only
691 * and as such no data is present in the skb header.
693 * In addition if skb is not at least 60 bytes we need to pad it so that
694 * it is large enough to qualify as a valid Ethernet frame.
696 * Returns true if an error was encountered and skb was freed.
698 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring
*rx_ring
,
699 union ixgbe_adv_rx_desc
*rx_desc
,
702 /* verify that the packet does not have any known errors */
703 if (unlikely(ixgbevf_test_staterr(rx_desc
,
704 IXGBE_RXDADV_ERR_FRAME_ERR_MASK
))) {
705 struct net_device
*netdev
= rx_ring
->netdev
;
707 if (!(netdev
->features
& NETIF_F_RXALL
)) {
708 dev_kfree_skb_any(skb
);
713 /* if eth_skb_pad returns an error the skb was freed */
714 if (eth_skb_pad(skb
))
721 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
722 * @rx_ring: rx descriptor ring to store buffers on
723 * @old_buff: donor buffer to have page reused
725 * Synchronizes page for reuse by the adapter
727 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring
*rx_ring
,
728 struct ixgbevf_rx_buffer
*old_buff
)
730 struct ixgbevf_rx_buffer
*new_buff
;
731 u16 nta
= rx_ring
->next_to_alloc
;
733 new_buff
= &rx_ring
->rx_buffer_info
[nta
];
735 /* update, and store next to alloc */
737 rx_ring
->next_to_alloc
= (nta
< rx_ring
->count
) ? nta
: 0;
739 /* transfer page from old buffer to new buffer */
740 new_buff
->page
= old_buff
->page
;
741 new_buff
->dma
= old_buff
->dma
;
742 new_buff
->page_offset
= old_buff
->page_offset
;
744 /* sync the buffer for use by the device */
745 dma_sync_single_range_for_device(rx_ring
->dev
, new_buff
->dma
,
746 new_buff
->page_offset
,
751 static inline bool ixgbevf_page_is_reserved(struct page
*page
)
753 return (page_to_nid(page
) != numa_mem_id()) || page_is_pfmemalloc(page
);
757 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
758 * @rx_ring: rx descriptor ring to transact packets on
759 * @rx_buffer: buffer containing page to add
760 * @rx_desc: descriptor containing length of buffer written by hardware
761 * @skb: sk_buff to place the data into
763 * This function will add the data contained in rx_buffer->page to the skb.
764 * This is done either through a direct copy if the data in the buffer is
765 * less than the skb header size, otherwise it will just attach the page as
768 * The function will then update the page offset if necessary and return
769 * true if the buffer can be reused by the adapter.
771 static bool ixgbevf_add_rx_frag(struct ixgbevf_ring
*rx_ring
,
772 struct ixgbevf_rx_buffer
*rx_buffer
,
773 union ixgbe_adv_rx_desc
*rx_desc
,
776 struct page
*page
= rx_buffer
->page
;
777 unsigned char *va
= page_address(page
) + rx_buffer
->page_offset
;
778 unsigned int size
= le16_to_cpu(rx_desc
->wb
.upper
.length
);
779 #if (PAGE_SIZE < 8192)
780 unsigned int truesize
= IXGBEVF_RX_BUFSZ
;
782 unsigned int truesize
= ALIGN(size
, L1_CACHE_BYTES
);
784 unsigned int pull_len
;
786 if (unlikely(skb_is_nonlinear(skb
)))
789 if (likely(size
<= IXGBEVF_RX_HDR_SIZE
)) {
790 memcpy(__skb_put(skb
, size
), va
, ALIGN(size
, sizeof(long)));
792 /* page is not reserved, we can reuse buffer as is */
793 if (likely(!ixgbevf_page_is_reserved(page
)))
796 /* this page cannot be reused so discard it */
801 /* we need the header to contain the greater of either ETH_HLEN or
802 * 60 bytes if the skb->len is less than 60 for skb_pad.
804 pull_len
= eth_get_headlen(va
, IXGBEVF_RX_HDR_SIZE
);
806 /* align pull length to size of long to optimize memcpy performance */
807 memcpy(__skb_put(skb
, pull_len
), va
, ALIGN(pull_len
, sizeof(long)));
809 /* update all of the pointers */
814 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, page
,
815 (unsigned long)va
& ~PAGE_MASK
, size
, truesize
);
817 /* avoid re-using remote pages */
818 if (unlikely(ixgbevf_page_is_reserved(page
)))
821 #if (PAGE_SIZE < 8192)
822 /* if we are only owner of page we can reuse it */
823 if (unlikely(page_count(page
) != 1))
826 /* flip page offset to other buffer */
827 rx_buffer
->page_offset
^= IXGBEVF_RX_BUFSZ
;
830 /* move offset up to the next cache line */
831 rx_buffer
->page_offset
+= truesize
;
833 if (rx_buffer
->page_offset
> (PAGE_SIZE
- IXGBEVF_RX_BUFSZ
))
837 /* Even if we own the page, we are not allowed to use atomic_set()
838 * This would break get_page_unless_zero() users.
840 atomic_inc(&page
->_count
);
845 static struct sk_buff
*ixgbevf_fetch_rx_buffer(struct ixgbevf_ring
*rx_ring
,
846 union ixgbe_adv_rx_desc
*rx_desc
,
849 struct ixgbevf_rx_buffer
*rx_buffer
;
852 rx_buffer
= &rx_ring
->rx_buffer_info
[rx_ring
->next_to_clean
];
853 page
= rx_buffer
->page
;
857 void *page_addr
= page_address(page
) +
858 rx_buffer
->page_offset
;
860 /* prefetch first cache line of first page */
862 #if L1_CACHE_BYTES < 128
863 prefetch(page_addr
+ L1_CACHE_BYTES
);
866 /* allocate a skb to store the frags */
867 skb
= netdev_alloc_skb_ip_align(rx_ring
->netdev
,
868 IXGBEVF_RX_HDR_SIZE
);
869 if (unlikely(!skb
)) {
870 rx_ring
->rx_stats
.alloc_rx_buff_failed
++;
874 /* we will be copying header into skb->data in
875 * pskb_may_pull so it is in our interest to prefetch
876 * it now to avoid a possible cache miss
878 prefetchw(skb
->data
);
881 /* we are reusing so sync this buffer for CPU use */
882 dma_sync_single_range_for_cpu(rx_ring
->dev
,
884 rx_buffer
->page_offset
,
888 /* pull page into skb */
889 if (ixgbevf_add_rx_frag(rx_ring
, rx_buffer
, rx_desc
, skb
)) {
890 /* hand second half of page back to the ring */
891 ixgbevf_reuse_rx_page(rx_ring
, rx_buffer
);
893 /* we are not reusing the buffer so unmap it */
894 dma_unmap_page(rx_ring
->dev
, rx_buffer
->dma
,
895 PAGE_SIZE
, DMA_FROM_DEVICE
);
898 /* clear contents of buffer_info */
900 rx_buffer
->page
= NULL
;
905 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter
*adapter
,
908 struct ixgbe_hw
*hw
= &adapter
->hw
;
910 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, qmask
);
913 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector
*q_vector
,
914 struct ixgbevf_ring
*rx_ring
,
917 unsigned int total_rx_bytes
= 0, total_rx_packets
= 0;
918 u16 cleaned_count
= ixgbevf_desc_unused(rx_ring
);
919 struct sk_buff
*skb
= rx_ring
->skb
;
921 while (likely(total_rx_packets
< budget
)) {
922 union ixgbe_adv_rx_desc
*rx_desc
;
924 /* return some buffers to hardware, one at a time is too slow */
925 if (cleaned_count
>= IXGBEVF_RX_BUFFER_WRITE
) {
926 ixgbevf_alloc_rx_buffers(rx_ring
, cleaned_count
);
930 rx_desc
= IXGBEVF_RX_DESC(rx_ring
, rx_ring
->next_to_clean
);
932 if (!ixgbevf_test_staterr(rx_desc
, IXGBE_RXD_STAT_DD
))
935 /* This memory barrier is needed to keep us from reading
936 * any other fields out of the rx_desc until we know the
937 * RXD_STAT_DD bit is set
941 /* retrieve a buffer from the ring */
942 skb
= ixgbevf_fetch_rx_buffer(rx_ring
, rx_desc
, skb
);
944 /* exit if we failed to retrieve a buffer */
950 /* fetch next buffer in frame if non-eop */
951 if (ixgbevf_is_non_eop(rx_ring
, rx_desc
))
954 /* verify the packet layout is correct */
955 if (ixgbevf_cleanup_headers(rx_ring
, rx_desc
, skb
)) {
960 /* probably a little skewed due to removing CRC */
961 total_rx_bytes
+= skb
->len
;
963 /* Workaround hardware that can't do proper VEPA multicast
966 if ((skb
->pkt_type
== PACKET_BROADCAST
||
967 skb
->pkt_type
== PACKET_MULTICAST
) &&
968 ether_addr_equal(rx_ring
->netdev
->dev_addr
,
969 eth_hdr(skb
)->h_source
)) {
970 dev_kfree_skb_irq(skb
);
974 /* populate checksum, VLAN, and protocol */
975 ixgbevf_process_skb_fields(rx_ring
, rx_desc
, skb
);
977 ixgbevf_rx_skb(q_vector
, skb
);
979 /* reset skb pointer */
982 /* update budget accounting */
986 /* place incomplete frames back on ring for completion */
989 u64_stats_update_begin(&rx_ring
->syncp
);
990 rx_ring
->stats
.packets
+= total_rx_packets
;
991 rx_ring
->stats
.bytes
+= total_rx_bytes
;
992 u64_stats_update_end(&rx_ring
->syncp
);
993 q_vector
->rx
.total_packets
+= total_rx_packets
;
994 q_vector
->rx
.total_bytes
+= total_rx_bytes
;
996 return total_rx_packets
;
1000 * ixgbevf_poll - NAPI polling calback
1001 * @napi: napi struct with our devices info in it
1002 * @budget: amount of work driver is allowed to do this pass, in packets
1004 * This function will clean more than one or more rings associated with a
1007 static int ixgbevf_poll(struct napi_struct
*napi
, int budget
)
1009 struct ixgbevf_q_vector
*q_vector
=
1010 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1011 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1012 struct ixgbevf_ring
*ring
;
1013 int per_ring_budget
, work_done
= 0;
1014 bool clean_complete
= true;
1016 ixgbevf_for_each_ring(ring
, q_vector
->tx
)
1017 clean_complete
&= ixgbevf_clean_tx_irq(q_vector
, ring
);
1021 #ifdef CONFIG_NET_RX_BUSY_POLL
1022 if (!ixgbevf_qv_lock_napi(q_vector
))
1026 /* attempt to distribute budget to each queue fairly, but don't allow
1027 * the budget to go below 1 because we'll exit polling
1029 if (q_vector
->rx
.count
> 1)
1030 per_ring_budget
= max(budget
/q_vector
->rx
.count
, 1);
1032 per_ring_budget
= budget
;
1034 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1035 int cleaned
= ixgbevf_clean_rx_irq(q_vector
, ring
,
1037 work_done
+= cleaned
;
1038 clean_complete
&= (cleaned
< per_ring_budget
);
1041 #ifdef CONFIG_NET_RX_BUSY_POLL
1042 ixgbevf_qv_unlock_napi(q_vector
);
1045 /* If all work not completed, return budget and keep polling */
1046 if (!clean_complete
)
1048 /* all work done, exit the polling mode */
1049 napi_complete_done(napi
, work_done
);
1050 if (adapter
->rx_itr_setting
== 1)
1051 ixgbevf_set_itr(q_vector
);
1052 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
) &&
1053 !test_bit(__IXGBEVF_REMOVING
, &adapter
->state
))
1054 ixgbevf_irq_enable_queues(adapter
,
1055 1 << q_vector
->v_idx
);
1061 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1062 * @q_vector: structure containing interrupt and ring information
1064 void ixgbevf_write_eitr(struct ixgbevf_q_vector
*q_vector
)
1066 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1067 struct ixgbe_hw
*hw
= &adapter
->hw
;
1068 int v_idx
= q_vector
->v_idx
;
1069 u32 itr_reg
= q_vector
->itr
& IXGBE_MAX_EITR
;
1071 /* set the WDIS bit to not clear the timer bits and cause an
1072 * immediate assertion of the interrupt
1074 itr_reg
|= IXGBE_EITR_CNT_WDIS
;
1076 IXGBE_WRITE_REG(hw
, IXGBE_VTEITR(v_idx
), itr_reg
);
1079 #ifdef CONFIG_NET_RX_BUSY_POLL
1080 /* must be called with local_bh_disable()d */
1081 static int ixgbevf_busy_poll_recv(struct napi_struct
*napi
)
1083 struct ixgbevf_q_vector
*q_vector
=
1084 container_of(napi
, struct ixgbevf_q_vector
, napi
);
1085 struct ixgbevf_adapter
*adapter
= q_vector
->adapter
;
1086 struct ixgbevf_ring
*ring
;
1089 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
1090 return LL_FLUSH_FAILED
;
1092 if (!ixgbevf_qv_lock_poll(q_vector
))
1093 return LL_FLUSH_BUSY
;
1095 ixgbevf_for_each_ring(ring
, q_vector
->rx
) {
1096 found
= ixgbevf_clean_rx_irq(q_vector
, ring
, 4);
1097 #ifdef BP_EXTENDED_STATS
1099 ring
->stats
.cleaned
+= found
;
1101 ring
->stats
.misses
++;
1107 ixgbevf_qv_unlock_poll(q_vector
);
1111 #endif /* CONFIG_NET_RX_BUSY_POLL */
1114 * ixgbevf_configure_msix - Configure MSI-X hardware
1115 * @adapter: board private structure
1117 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1120 static void ixgbevf_configure_msix(struct ixgbevf_adapter
*adapter
)
1122 struct ixgbevf_q_vector
*q_vector
;
1123 int q_vectors
, v_idx
;
1125 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1126 adapter
->eims_enable_mask
= 0;
1128 /* Populate the IVAR table and set the ITR values to the
1129 * corresponding register.
1131 for (v_idx
= 0; v_idx
< q_vectors
; v_idx
++) {
1132 struct ixgbevf_ring
*ring
;
1134 q_vector
= adapter
->q_vector
[v_idx
];
1136 ixgbevf_for_each_ring(ring
, q_vector
->rx
)
1137 ixgbevf_set_ivar(adapter
, 0, ring
->reg_idx
, v_idx
);
1139 ixgbevf_for_each_ring(ring
, q_vector
->tx
)
1140 ixgbevf_set_ivar(adapter
, 1, ring
->reg_idx
, v_idx
);
1142 if (q_vector
->tx
.ring
&& !q_vector
->rx
.ring
) {
1143 /* Tx only vector */
1144 if (adapter
->tx_itr_setting
== 1)
1145 q_vector
->itr
= IXGBE_12K_ITR
;
1147 q_vector
->itr
= adapter
->tx_itr_setting
;
1149 /* Rx or Rx/Tx vector */
1150 if (adapter
->rx_itr_setting
== 1)
1151 q_vector
->itr
= IXGBE_20K_ITR
;
1153 q_vector
->itr
= adapter
->rx_itr_setting
;
1156 /* add q_vector eims value to global eims_enable_mask */
1157 adapter
->eims_enable_mask
|= 1 << v_idx
;
1159 ixgbevf_write_eitr(q_vector
);
1162 ixgbevf_set_ivar(adapter
, -1, 1, v_idx
);
1163 /* setup eims_other and add value to global eims_enable_mask */
1164 adapter
->eims_other
= 1 << v_idx
;
1165 adapter
->eims_enable_mask
|= adapter
->eims_other
;
1168 enum latency_range
{
1172 latency_invalid
= 255
1176 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1177 * @q_vector: structure containing interrupt and ring information
1178 * @ring_container: structure containing ring performance data
1180 * Stores a new ITR value based on packets and byte
1181 * counts during the last interrupt. The advantage of per interrupt
1182 * computation is faster updates and more accurate ITR for the current
1183 * traffic pattern. Constants in this function were computed
1184 * based on theoretical maximum wire speed and thresholds were set based
1185 * on testing data as well as attempting to minimize response time
1186 * while increasing bulk throughput.
1188 static void ixgbevf_update_itr(struct ixgbevf_q_vector
*q_vector
,
1189 struct ixgbevf_ring_container
*ring_container
)
1191 int bytes
= ring_container
->total_bytes
;
1192 int packets
= ring_container
->total_packets
;
1195 u8 itr_setting
= ring_container
->itr
;
1200 /* simple throttle rate management
1201 * 0-20MB/s lowest (100000 ints/s)
1202 * 20-100MB/s low (20000 ints/s)
1203 * 100-1249MB/s bulk (12000 ints/s)
1205 /* what was last interrupt timeslice? */
1206 timepassed_us
= q_vector
->itr
>> 2;
1207 bytes_perint
= bytes
/ timepassed_us
; /* bytes/usec */
1209 switch (itr_setting
) {
1210 case lowest_latency
:
1211 if (bytes_perint
> 10)
1212 itr_setting
= low_latency
;
1215 if (bytes_perint
> 20)
1216 itr_setting
= bulk_latency
;
1217 else if (bytes_perint
<= 10)
1218 itr_setting
= lowest_latency
;
1221 if (bytes_perint
<= 20)
1222 itr_setting
= low_latency
;
1226 /* clear work counters since we have the values we need */
1227 ring_container
->total_bytes
= 0;
1228 ring_container
->total_packets
= 0;
1230 /* write updated itr to ring container */
1231 ring_container
->itr
= itr_setting
;
1234 static void ixgbevf_set_itr(struct ixgbevf_q_vector
*q_vector
)
1236 u32 new_itr
= q_vector
->itr
;
1239 ixgbevf_update_itr(q_vector
, &q_vector
->tx
);
1240 ixgbevf_update_itr(q_vector
, &q_vector
->rx
);
1242 current_itr
= max(q_vector
->rx
.itr
, q_vector
->tx
.itr
);
1244 switch (current_itr
) {
1245 /* counts and packets in update_itr are dependent on these numbers */
1246 case lowest_latency
:
1247 new_itr
= IXGBE_100K_ITR
;
1250 new_itr
= IXGBE_20K_ITR
;
1253 new_itr
= IXGBE_12K_ITR
;
1259 if (new_itr
!= q_vector
->itr
) {
1260 /* do an exponential smoothing */
1261 new_itr
= (10 * new_itr
* q_vector
->itr
) /
1262 ((9 * new_itr
) + q_vector
->itr
);
1264 /* save the algorithm value here */
1265 q_vector
->itr
= new_itr
;
1267 ixgbevf_write_eitr(q_vector
);
1271 static irqreturn_t
ixgbevf_msix_other(int irq
, void *data
)
1273 struct ixgbevf_adapter
*adapter
= data
;
1274 struct ixgbe_hw
*hw
= &adapter
->hw
;
1276 hw
->mac
.get_link_status
= 1;
1278 ixgbevf_service_event_schedule(adapter
);
1280 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_other
);
1286 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1288 * @data: pointer to our q_vector struct for this interrupt vector
1290 static irqreturn_t
ixgbevf_msix_clean_rings(int irq
, void *data
)
1292 struct ixgbevf_q_vector
*q_vector
= data
;
1294 /* EIAM disabled interrupts (on this vector) for us */
1295 if (q_vector
->rx
.ring
|| q_vector
->tx
.ring
)
1296 napi_schedule_irqoff(&q_vector
->napi
);
1301 static inline void map_vector_to_rxq(struct ixgbevf_adapter
*a
, int v_idx
,
1304 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1306 a
->rx_ring
[r_idx
]->next
= q_vector
->rx
.ring
;
1307 q_vector
->rx
.ring
= a
->rx_ring
[r_idx
];
1308 q_vector
->rx
.count
++;
1311 static inline void map_vector_to_txq(struct ixgbevf_adapter
*a
, int v_idx
,
1314 struct ixgbevf_q_vector
*q_vector
= a
->q_vector
[v_idx
];
1316 a
->tx_ring
[t_idx
]->next
= q_vector
->tx
.ring
;
1317 q_vector
->tx
.ring
= a
->tx_ring
[t_idx
];
1318 q_vector
->tx
.count
++;
1322 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1323 * @adapter: board private structure to initialize
1325 * This function maps descriptor rings to the queue-specific vectors
1326 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1327 * one vector per ring/queue, but on a constrained vector budget, we
1328 * group the rings as "efficiently" as possible. You would add new
1329 * mapping configurations in here.
1331 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter
*adapter
)
1335 int rxr_idx
= 0, txr_idx
= 0;
1336 int rxr_remaining
= adapter
->num_rx_queues
;
1337 int txr_remaining
= adapter
->num_tx_queues
;
1341 q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1343 /* The ideal configuration...
1344 * We have enough vectors to map one per queue.
1346 if (q_vectors
== adapter
->num_rx_queues
+ adapter
->num_tx_queues
) {
1347 for (; rxr_idx
< rxr_remaining
; v_start
++, rxr_idx
++)
1348 map_vector_to_rxq(adapter
, v_start
, rxr_idx
);
1350 for (; txr_idx
< txr_remaining
; v_start
++, txr_idx
++)
1351 map_vector_to_txq(adapter
, v_start
, txr_idx
);
1355 /* If we don't have enough vectors for a 1-to-1
1356 * mapping, we'll have to group them so there are
1357 * multiple queues per vector.
1359 /* Re-adjusting *qpv takes care of the remainder. */
1360 for (i
= v_start
; i
< q_vectors
; i
++) {
1361 rqpv
= DIV_ROUND_UP(rxr_remaining
, q_vectors
- i
);
1362 for (j
= 0; j
< rqpv
; j
++) {
1363 map_vector_to_rxq(adapter
, i
, rxr_idx
);
1368 for (i
= v_start
; i
< q_vectors
; i
++) {
1369 tqpv
= DIV_ROUND_UP(txr_remaining
, q_vectors
- i
);
1370 for (j
= 0; j
< tqpv
; j
++) {
1371 map_vector_to_txq(adapter
, i
, txr_idx
);
1381 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1382 * @adapter: board private structure
1384 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1385 * interrupts from the kernel.
1387 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter
*adapter
)
1389 struct net_device
*netdev
= adapter
->netdev
;
1390 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1394 for (vector
= 0; vector
< q_vectors
; vector
++) {
1395 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[vector
];
1396 struct msix_entry
*entry
= &adapter
->msix_entries
[vector
];
1398 if (q_vector
->tx
.ring
&& q_vector
->rx
.ring
) {
1399 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1400 "%s-%s-%d", netdev
->name
, "TxRx", ri
++);
1402 } else if (q_vector
->rx
.ring
) {
1403 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1404 "%s-%s-%d", netdev
->name
, "rx", ri
++);
1405 } else if (q_vector
->tx
.ring
) {
1406 snprintf(q_vector
->name
, sizeof(q_vector
->name
) - 1,
1407 "%s-%s-%d", netdev
->name
, "tx", ti
++);
1409 /* skip this unused q_vector */
1412 err
= request_irq(entry
->vector
, &ixgbevf_msix_clean_rings
, 0,
1413 q_vector
->name
, q_vector
);
1415 hw_dbg(&adapter
->hw
,
1416 "request_irq failed for MSIX interrupt Error: %d\n",
1418 goto free_queue_irqs
;
1422 err
= request_irq(adapter
->msix_entries
[vector
].vector
,
1423 &ixgbevf_msix_other
, 0, netdev
->name
, adapter
);
1425 hw_dbg(&adapter
->hw
, "request_irq for msix_other failed: %d\n",
1427 goto free_queue_irqs
;
1435 free_irq(adapter
->msix_entries
[vector
].vector
,
1436 adapter
->q_vector
[vector
]);
1438 /* This failure is non-recoverable - it indicates the system is
1439 * out of MSIX vector resources and the VF driver cannot run
1440 * without them. Set the number of msix vectors to zero
1441 * indicating that not enough can be allocated. The error
1442 * will be returned to the user indicating device open failed.
1443 * Any further attempts to force the driver to open will also
1444 * fail. The only way to recover is to unload the driver and
1445 * reload it again. If the system has recovered some MSIX
1446 * vectors then it may succeed.
1448 adapter
->num_msix_vectors
= 0;
1452 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter
*adapter
)
1454 int i
, q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1456 for (i
= 0; i
< q_vectors
; i
++) {
1457 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[i
];
1459 q_vector
->rx
.ring
= NULL
;
1460 q_vector
->tx
.ring
= NULL
;
1461 q_vector
->rx
.count
= 0;
1462 q_vector
->tx
.count
= 0;
1467 * ixgbevf_request_irq - initialize interrupts
1468 * @adapter: board private structure
1470 * Attempts to configure interrupts using the best available
1471 * capabilities of the hardware and kernel.
1473 static int ixgbevf_request_irq(struct ixgbevf_adapter
*adapter
)
1475 int err
= ixgbevf_request_msix_irqs(adapter
);
1478 hw_dbg(&adapter
->hw
, "request_irq failed, Error %d\n", err
);
1483 static void ixgbevf_free_irq(struct ixgbevf_adapter
*adapter
)
1487 q_vectors
= adapter
->num_msix_vectors
;
1490 free_irq(adapter
->msix_entries
[i
].vector
, adapter
);
1493 for (; i
>= 0; i
--) {
1494 /* free only the irqs that were actually requested */
1495 if (!adapter
->q_vector
[i
]->rx
.ring
&&
1496 !adapter
->q_vector
[i
]->tx
.ring
)
1499 free_irq(adapter
->msix_entries
[i
].vector
,
1500 adapter
->q_vector
[i
]);
1503 ixgbevf_reset_q_vectors(adapter
);
1507 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1508 * @adapter: board private structure
1510 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter
*adapter
)
1512 struct ixgbe_hw
*hw
= &adapter
->hw
;
1515 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, 0);
1516 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMC
, ~0);
1517 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, 0);
1519 IXGBE_WRITE_FLUSH(hw
);
1521 for (i
= 0; i
< adapter
->num_msix_vectors
; i
++)
1522 synchronize_irq(adapter
->msix_entries
[i
].vector
);
1526 * ixgbevf_irq_enable - Enable default interrupt generation settings
1527 * @adapter: board private structure
1529 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter
*adapter
)
1531 struct ixgbe_hw
*hw
= &adapter
->hw
;
1533 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAM
, adapter
->eims_enable_mask
);
1534 IXGBE_WRITE_REG(hw
, IXGBE_VTEIAC
, adapter
->eims_enable_mask
);
1535 IXGBE_WRITE_REG(hw
, IXGBE_VTEIMS
, adapter
->eims_enable_mask
);
1539 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1540 * @adapter: board private structure
1541 * @ring: structure containing ring specific data
1543 * Configure the Tx descriptor ring after a reset.
1545 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter
*adapter
,
1546 struct ixgbevf_ring
*ring
)
1548 struct ixgbe_hw
*hw
= &adapter
->hw
;
1549 u64 tdba
= ring
->dma
;
1551 u32 txdctl
= IXGBE_TXDCTL_ENABLE
;
1552 u8 reg_idx
= ring
->reg_idx
;
1554 /* disable queue to avoid issues while updating state */
1555 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), IXGBE_TXDCTL_SWFLSH
);
1556 IXGBE_WRITE_FLUSH(hw
);
1558 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAL(reg_idx
), tdba
& DMA_BIT_MASK(32));
1559 IXGBE_WRITE_REG(hw
, IXGBE_VFTDBAH(reg_idx
), tdba
>> 32);
1560 IXGBE_WRITE_REG(hw
, IXGBE_VFTDLEN(reg_idx
),
1561 ring
->count
* sizeof(union ixgbe_adv_tx_desc
));
1563 /* disable head writeback */
1564 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAH(reg_idx
), 0);
1565 IXGBE_WRITE_REG(hw
, IXGBE_VFTDWBAL(reg_idx
), 0);
1567 /* enable relaxed ordering */
1568 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_TXCTRL(reg_idx
),
1569 (IXGBE_DCA_TXCTRL_DESC_RRO_EN
|
1570 IXGBE_DCA_TXCTRL_DATA_RRO_EN
));
1572 /* reset head and tail pointers */
1573 IXGBE_WRITE_REG(hw
, IXGBE_VFTDH(reg_idx
), 0);
1574 IXGBE_WRITE_REG(hw
, IXGBE_VFTDT(reg_idx
), 0);
1575 ring
->tail
= adapter
->io_addr
+ IXGBE_VFTDT(reg_idx
);
1577 /* reset ntu and ntc to place SW in sync with hardwdare */
1578 ring
->next_to_clean
= 0;
1579 ring
->next_to_use
= 0;
1581 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1582 * to or less than the number of on chip descriptors, which is
1585 txdctl
|= (8 << 16); /* WTHRESH = 8 */
1587 /* Setting PTHRESH to 32 both improves performance */
1588 txdctl
|= (1 << 8) | /* HTHRESH = 1 */
1589 32; /* PTHRESH = 32 */
1591 clear_bit(__IXGBEVF_HANG_CHECK_ARMED
, &ring
->state
);
1593 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
), txdctl
);
1595 /* poll to verify queue is enabled */
1597 usleep_range(1000, 2000);
1598 txdctl
= IXGBE_READ_REG(hw
, IXGBE_VFTXDCTL(reg_idx
));
1599 } while (--wait_loop
&& !(txdctl
& IXGBE_TXDCTL_ENABLE
));
1601 pr_err("Could not enable Tx Queue %d\n", reg_idx
);
1605 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1606 * @adapter: board private structure
1608 * Configure the Tx unit of the MAC after a reset.
1610 static void ixgbevf_configure_tx(struct ixgbevf_adapter
*adapter
)
1614 /* Setup the HW Tx Head and Tail descriptor pointers */
1615 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1616 ixgbevf_configure_tx_ring(adapter
, adapter
->tx_ring
[i
]);
1619 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1621 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter
*adapter
, int index
)
1623 struct ixgbe_hw
*hw
= &adapter
->hw
;
1626 srrctl
= IXGBE_SRRCTL_DROP_EN
;
1628 srrctl
|= IXGBEVF_RX_HDR_SIZE
<< IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT
;
1629 srrctl
|= IXGBEVF_RX_BUFSZ
>> IXGBE_SRRCTL_BSIZEPKT_SHIFT
;
1630 srrctl
|= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF
;
1632 IXGBE_WRITE_REG(hw
, IXGBE_VFSRRCTL(index
), srrctl
);
1635 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter
*adapter
)
1637 struct ixgbe_hw
*hw
= &adapter
->hw
;
1639 /* PSRTYPE must be initialized in 82599 */
1640 u32 psrtype
= IXGBE_PSRTYPE_TCPHDR
| IXGBE_PSRTYPE_UDPHDR
|
1641 IXGBE_PSRTYPE_IPV4HDR
| IXGBE_PSRTYPE_IPV6HDR
|
1642 IXGBE_PSRTYPE_L2HDR
;
1644 if (adapter
->num_rx_queues
> 1)
1647 IXGBE_WRITE_REG(hw
, IXGBE_VFPSRTYPE
, psrtype
);
1650 #define IXGBEVF_MAX_RX_DESC_POLL 10
1651 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter
*adapter
,
1652 struct ixgbevf_ring
*ring
)
1654 struct ixgbe_hw
*hw
= &adapter
->hw
;
1655 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1657 u8 reg_idx
= ring
->reg_idx
;
1659 if (IXGBE_REMOVED(hw
->hw_addr
))
1661 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1662 rxdctl
&= ~IXGBE_RXDCTL_ENABLE
;
1664 /* write value back with RXDCTL.ENABLE bit cleared */
1665 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1667 /* the hardware may take up to 100us to really disable the Rx queue */
1670 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1671 } while (--wait_loop
&& (rxdctl
& IXGBE_RXDCTL_ENABLE
));
1674 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1678 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter
*adapter
,
1679 struct ixgbevf_ring
*ring
)
1681 struct ixgbe_hw
*hw
= &adapter
->hw
;
1682 int wait_loop
= IXGBEVF_MAX_RX_DESC_POLL
;
1684 u8 reg_idx
= ring
->reg_idx
;
1686 if (IXGBE_REMOVED(hw
->hw_addr
))
1689 usleep_range(1000, 2000);
1690 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1691 } while (--wait_loop
&& !(rxdctl
& IXGBE_RXDCTL_ENABLE
));
1694 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1698 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter
*adapter
)
1700 struct ixgbe_hw
*hw
= &adapter
->hw
;
1701 u32 vfmrqc
= 0, vfreta
= 0;
1702 u16 rss_i
= adapter
->num_rx_queues
;
1705 /* Fill out hash function seeds */
1706 netdev_rss_key_fill(adapter
->rss_key
, sizeof(adapter
->rss_key
));
1707 for (i
= 0; i
< IXGBEVF_VFRSSRK_REGS
; i
++)
1708 IXGBE_WRITE_REG(hw
, IXGBE_VFRSSRK(i
), adapter
->rss_key
[i
]);
1710 for (i
= 0, j
= 0; i
< IXGBEVF_X550_VFRETA_SIZE
; i
++, j
++) {
1714 adapter
->rss_indir_tbl
[i
] = j
;
1716 vfreta
|= j
<< (i
& 0x3) * 8;
1718 IXGBE_WRITE_REG(hw
, IXGBE_VFRETA(i
>> 2), vfreta
);
1723 /* Perform hash on these packet types */
1724 vfmrqc
|= IXGBE_VFMRQC_RSS_FIELD_IPV4
|
1725 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP
|
1726 IXGBE_VFMRQC_RSS_FIELD_IPV6
|
1727 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP
;
1729 vfmrqc
|= IXGBE_VFMRQC_RSSEN
;
1731 IXGBE_WRITE_REG(hw
, IXGBE_VFMRQC
, vfmrqc
);
1734 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter
*adapter
,
1735 struct ixgbevf_ring
*ring
)
1737 struct ixgbe_hw
*hw
= &adapter
->hw
;
1738 u64 rdba
= ring
->dma
;
1740 u8 reg_idx
= ring
->reg_idx
;
1742 /* disable queue to avoid issues while updating state */
1743 rxdctl
= IXGBE_READ_REG(hw
, IXGBE_VFRXDCTL(reg_idx
));
1744 ixgbevf_disable_rx_queue(adapter
, ring
);
1746 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAL(reg_idx
), rdba
& DMA_BIT_MASK(32));
1747 IXGBE_WRITE_REG(hw
, IXGBE_VFRDBAH(reg_idx
), rdba
>> 32);
1748 IXGBE_WRITE_REG(hw
, IXGBE_VFRDLEN(reg_idx
),
1749 ring
->count
* sizeof(union ixgbe_adv_rx_desc
));
1751 /* enable relaxed ordering */
1752 IXGBE_WRITE_REG(hw
, IXGBE_VFDCA_RXCTRL(reg_idx
),
1753 IXGBE_DCA_RXCTRL_DESC_RRO_EN
);
1755 /* reset head and tail pointers */
1756 IXGBE_WRITE_REG(hw
, IXGBE_VFRDH(reg_idx
), 0);
1757 IXGBE_WRITE_REG(hw
, IXGBE_VFRDT(reg_idx
), 0);
1758 ring
->tail
= adapter
->io_addr
+ IXGBE_VFRDT(reg_idx
);
1760 /* reset ntu and ntc to place SW in sync with hardwdare */
1761 ring
->next_to_clean
= 0;
1762 ring
->next_to_use
= 0;
1763 ring
->next_to_alloc
= 0;
1765 ixgbevf_configure_srrctl(adapter
, reg_idx
);
1767 /* allow any size packet since we can handle overflow */
1768 rxdctl
&= ~IXGBE_RXDCTL_RLPML_EN
;
1770 rxdctl
|= IXGBE_RXDCTL_ENABLE
| IXGBE_RXDCTL_VME
;
1771 IXGBE_WRITE_REG(hw
, IXGBE_VFRXDCTL(reg_idx
), rxdctl
);
1773 ixgbevf_rx_desc_queue_enable(adapter
, ring
);
1774 ixgbevf_alloc_rx_buffers(ring
, ixgbevf_desc_unused(ring
));
1778 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1779 * @adapter: board private structure
1781 * Configure the Rx unit of the MAC after a reset.
1783 static void ixgbevf_configure_rx(struct ixgbevf_adapter
*adapter
)
1786 struct ixgbe_hw
*hw
= &adapter
->hw
;
1787 struct net_device
*netdev
= adapter
->netdev
;
1789 ixgbevf_setup_psrtype(adapter
);
1790 if (hw
->mac
.type
>= ixgbe_mac_X550_vf
)
1791 ixgbevf_setup_vfmrqc(adapter
);
1793 /* notify the PF of our intent to use this size of frame */
1794 ixgbevf_rlpml_set_vf(hw
, netdev
->mtu
+ ETH_HLEN
+ ETH_FCS_LEN
);
1796 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1797 * the Base and Length of the Rx Descriptor Ring
1799 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1800 ixgbevf_configure_rx_ring(adapter
, adapter
->rx_ring
[i
]);
1803 static int ixgbevf_vlan_rx_add_vid(struct net_device
*netdev
,
1804 __be16 proto
, u16 vid
)
1806 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1807 struct ixgbe_hw
*hw
= &adapter
->hw
;
1810 spin_lock_bh(&adapter
->mbx_lock
);
1812 /* add VID to filter table */
1813 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, true);
1815 spin_unlock_bh(&adapter
->mbx_lock
);
1817 /* translate error return types so error makes sense */
1818 if (err
== IXGBE_ERR_MBX
)
1821 if (err
== IXGBE_ERR_INVALID_ARGUMENT
)
1824 set_bit(vid
, adapter
->active_vlans
);
1829 static int ixgbevf_vlan_rx_kill_vid(struct net_device
*netdev
,
1830 __be16 proto
, u16 vid
)
1832 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1833 struct ixgbe_hw
*hw
= &adapter
->hw
;
1836 spin_lock_bh(&adapter
->mbx_lock
);
1838 /* remove VID from filter table */
1839 err
= hw
->mac
.ops
.set_vfta(hw
, vid
, 0, false);
1841 spin_unlock_bh(&adapter
->mbx_lock
);
1843 clear_bit(vid
, adapter
->active_vlans
);
1848 static void ixgbevf_restore_vlan(struct ixgbevf_adapter
*adapter
)
1852 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
1853 ixgbevf_vlan_rx_add_vid(adapter
->netdev
,
1854 htons(ETH_P_8021Q
), vid
);
1857 static int ixgbevf_write_uc_addr_list(struct net_device
*netdev
)
1859 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1860 struct ixgbe_hw
*hw
= &adapter
->hw
;
1863 if ((netdev_uc_count(netdev
)) > 10) {
1864 pr_err("Too many unicast filters - No Space\n");
1868 if (!netdev_uc_empty(netdev
)) {
1869 struct netdev_hw_addr
*ha
;
1871 netdev_for_each_uc_addr(ha
, netdev
) {
1872 hw
->mac
.ops
.set_uc_addr(hw
, ++count
, ha
->addr
);
1876 /* If the list is empty then send message to PF driver to
1877 * clear all MAC VLANs on this VF.
1879 hw
->mac
.ops
.set_uc_addr(hw
, 0, NULL
);
1886 * ixgbevf_set_rx_mode - Multicast and unicast set
1887 * @netdev: network interface device structure
1889 * The set_rx_method entry point is called whenever the multicast address
1890 * list, unicast address list or the network interface flags are updated.
1891 * This routine is responsible for configuring the hardware for proper
1892 * multicast mode and configuring requested unicast filters.
1894 static void ixgbevf_set_rx_mode(struct net_device
*netdev
)
1896 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
1897 struct ixgbe_hw
*hw
= &adapter
->hw
;
1898 unsigned int flags
= netdev
->flags
;
1901 xcast_mode
= (flags
& IFF_ALLMULTI
) ? IXGBEVF_XCAST_MODE_ALLMULTI
:
1902 (flags
& (IFF_BROADCAST
| IFF_MULTICAST
)) ?
1903 IXGBEVF_XCAST_MODE_MULTI
: IXGBEVF_XCAST_MODE_NONE
;
1905 spin_lock_bh(&adapter
->mbx_lock
);
1907 hw
->mac
.ops
.update_xcast_mode(hw
, netdev
, xcast_mode
);
1909 /* reprogram multicast list */
1910 hw
->mac
.ops
.update_mc_addr_list(hw
, netdev
);
1912 ixgbevf_write_uc_addr_list(netdev
);
1914 spin_unlock_bh(&adapter
->mbx_lock
);
1917 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter
*adapter
)
1920 struct ixgbevf_q_vector
*q_vector
;
1921 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1923 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1924 q_vector
= adapter
->q_vector
[q_idx
];
1925 #ifdef CONFIG_NET_RX_BUSY_POLL
1926 ixgbevf_qv_init_lock(adapter
->q_vector
[q_idx
]);
1928 napi_enable(&q_vector
->napi
);
1932 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter
*adapter
)
1935 struct ixgbevf_q_vector
*q_vector
;
1936 int q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
1938 for (q_idx
= 0; q_idx
< q_vectors
; q_idx
++) {
1939 q_vector
= adapter
->q_vector
[q_idx
];
1940 napi_disable(&q_vector
->napi
);
1941 #ifdef CONFIG_NET_RX_BUSY_POLL
1942 while (!ixgbevf_qv_disable(adapter
->q_vector
[q_idx
])) {
1943 pr_info("QV %d locked\n", q_idx
);
1944 usleep_range(1000, 20000);
1946 #endif /* CONFIG_NET_RX_BUSY_POLL */
1950 static int ixgbevf_configure_dcb(struct ixgbevf_adapter
*adapter
)
1952 struct ixgbe_hw
*hw
= &adapter
->hw
;
1953 unsigned int def_q
= 0;
1954 unsigned int num_tcs
= 0;
1955 unsigned int num_rx_queues
= adapter
->num_rx_queues
;
1956 unsigned int num_tx_queues
= adapter
->num_tx_queues
;
1959 spin_lock_bh(&adapter
->mbx_lock
);
1961 /* fetch queue configuration from the PF */
1962 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
1964 spin_unlock_bh(&adapter
->mbx_lock
);
1970 /* we need only one Tx queue */
1973 /* update default Tx ring register index */
1974 adapter
->tx_ring
[0]->reg_idx
= def_q
;
1976 /* we need as many queues as traffic classes */
1977 num_rx_queues
= num_tcs
;
1980 /* if we have a bad config abort request queue reset */
1981 if ((adapter
->num_rx_queues
!= num_rx_queues
) ||
1982 (adapter
->num_tx_queues
!= num_tx_queues
)) {
1983 /* force mailbox timeout to prevent further messages */
1984 hw
->mbx
.timeout
= 0;
1986 /* wait for watchdog to come around and bail us out */
1987 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED
, &adapter
->state
);
1993 static void ixgbevf_configure(struct ixgbevf_adapter
*adapter
)
1995 ixgbevf_configure_dcb(adapter
);
1997 ixgbevf_set_rx_mode(adapter
->netdev
);
1999 ixgbevf_restore_vlan(adapter
);
2001 ixgbevf_configure_tx(adapter
);
2002 ixgbevf_configure_rx(adapter
);
2005 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter
*adapter
)
2007 /* Only save pre-reset stats if there are some */
2008 if (adapter
->stats
.vfgprc
|| adapter
->stats
.vfgptc
) {
2009 adapter
->stats
.saved_reset_vfgprc
+= adapter
->stats
.vfgprc
-
2010 adapter
->stats
.base_vfgprc
;
2011 adapter
->stats
.saved_reset_vfgptc
+= adapter
->stats
.vfgptc
-
2012 adapter
->stats
.base_vfgptc
;
2013 adapter
->stats
.saved_reset_vfgorc
+= adapter
->stats
.vfgorc
-
2014 adapter
->stats
.base_vfgorc
;
2015 adapter
->stats
.saved_reset_vfgotc
+= adapter
->stats
.vfgotc
-
2016 adapter
->stats
.base_vfgotc
;
2017 adapter
->stats
.saved_reset_vfmprc
+= adapter
->stats
.vfmprc
-
2018 adapter
->stats
.base_vfmprc
;
2022 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter
*adapter
)
2024 struct ixgbe_hw
*hw
= &adapter
->hw
;
2026 adapter
->stats
.last_vfgprc
= IXGBE_READ_REG(hw
, IXGBE_VFGPRC
);
2027 adapter
->stats
.last_vfgorc
= IXGBE_READ_REG(hw
, IXGBE_VFGORC_LSB
);
2028 adapter
->stats
.last_vfgorc
|=
2029 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGORC_MSB
))) << 32);
2030 adapter
->stats
.last_vfgptc
= IXGBE_READ_REG(hw
, IXGBE_VFGPTC
);
2031 adapter
->stats
.last_vfgotc
= IXGBE_READ_REG(hw
, IXGBE_VFGOTC_LSB
);
2032 adapter
->stats
.last_vfgotc
|=
2033 (((u64
)(IXGBE_READ_REG(hw
, IXGBE_VFGOTC_MSB
))) << 32);
2034 adapter
->stats
.last_vfmprc
= IXGBE_READ_REG(hw
, IXGBE_VFMPRC
);
2036 adapter
->stats
.base_vfgprc
= adapter
->stats
.last_vfgprc
;
2037 adapter
->stats
.base_vfgorc
= adapter
->stats
.last_vfgorc
;
2038 adapter
->stats
.base_vfgptc
= adapter
->stats
.last_vfgptc
;
2039 adapter
->stats
.base_vfgotc
= adapter
->stats
.last_vfgotc
;
2040 adapter
->stats
.base_vfmprc
= adapter
->stats
.last_vfmprc
;
2043 static void ixgbevf_negotiate_api(struct ixgbevf_adapter
*adapter
)
2045 struct ixgbe_hw
*hw
= &adapter
->hw
;
2046 int api
[] = { ixgbe_mbox_api_12
,
2049 ixgbe_mbox_api_unknown
};
2052 spin_lock_bh(&adapter
->mbx_lock
);
2054 while (api
[idx
] != ixgbe_mbox_api_unknown
) {
2055 err
= ixgbevf_negotiate_api_version(hw
, api
[idx
]);
2061 spin_unlock_bh(&adapter
->mbx_lock
);
2064 static void ixgbevf_up_complete(struct ixgbevf_adapter
*adapter
)
2066 struct net_device
*netdev
= adapter
->netdev
;
2067 struct ixgbe_hw
*hw
= &adapter
->hw
;
2069 ixgbevf_configure_msix(adapter
);
2071 spin_lock_bh(&adapter
->mbx_lock
);
2073 if (is_valid_ether_addr(hw
->mac
.addr
))
2074 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.addr
, 0);
2076 hw
->mac
.ops
.set_rar(hw
, 0, hw
->mac
.perm_addr
, 0);
2078 spin_unlock_bh(&adapter
->mbx_lock
);
2080 smp_mb__before_atomic();
2081 clear_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2082 ixgbevf_napi_enable_all(adapter
);
2084 /* clear any pending interrupts, may auto mask */
2085 IXGBE_READ_REG(hw
, IXGBE_VTEICR
);
2086 ixgbevf_irq_enable(adapter
);
2088 /* enable transmits */
2089 netif_tx_start_all_queues(netdev
);
2091 ixgbevf_save_reset_stats(adapter
);
2092 ixgbevf_init_last_counter_stats(adapter
);
2094 hw
->mac
.get_link_status
= 1;
2095 mod_timer(&adapter
->service_timer
, jiffies
);
2098 void ixgbevf_up(struct ixgbevf_adapter
*adapter
)
2100 ixgbevf_configure(adapter
);
2102 ixgbevf_up_complete(adapter
);
2106 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2107 * @rx_ring: ring to free buffers from
2109 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring
*rx_ring
)
2111 struct device
*dev
= rx_ring
->dev
;
2115 /* Free Rx ring sk_buff */
2117 dev_kfree_skb(rx_ring
->skb
);
2118 rx_ring
->skb
= NULL
;
2121 /* ring already cleared, nothing to do */
2122 if (!rx_ring
->rx_buffer_info
)
2125 /* Free all the Rx ring pages */
2126 for (i
= 0; i
< rx_ring
->count
; i
++) {
2127 struct ixgbevf_rx_buffer
*rx_buffer
;
2129 rx_buffer
= &rx_ring
->rx_buffer_info
[i
];
2131 dma_unmap_page(dev
, rx_buffer
->dma
,
2132 PAGE_SIZE
, DMA_FROM_DEVICE
);
2134 if (rx_buffer
->page
)
2135 __free_page(rx_buffer
->page
);
2136 rx_buffer
->page
= NULL
;
2139 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
2140 memset(rx_ring
->rx_buffer_info
, 0, size
);
2142 /* Zero out the descriptor ring */
2143 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2147 * ixgbevf_clean_tx_ring - Free Tx Buffers
2148 * @tx_ring: ring to be cleaned
2150 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring
*tx_ring
)
2152 struct ixgbevf_tx_buffer
*tx_buffer_info
;
2156 if (!tx_ring
->tx_buffer_info
)
2159 /* Free all the Tx ring sk_buffs */
2160 for (i
= 0; i
< tx_ring
->count
; i
++) {
2161 tx_buffer_info
= &tx_ring
->tx_buffer_info
[i
];
2162 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer_info
);
2165 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2166 memset(tx_ring
->tx_buffer_info
, 0, size
);
2168 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2172 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2173 * @adapter: board private structure
2175 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter
*adapter
)
2179 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2180 ixgbevf_clean_rx_ring(adapter
->rx_ring
[i
]);
2184 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2185 * @adapter: board private structure
2187 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter
*adapter
)
2191 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2192 ixgbevf_clean_tx_ring(adapter
->tx_ring
[i
]);
2195 void ixgbevf_down(struct ixgbevf_adapter
*adapter
)
2197 struct net_device
*netdev
= adapter
->netdev
;
2198 struct ixgbe_hw
*hw
= &adapter
->hw
;
2201 /* signal that we are down to the interrupt handler */
2202 if (test_and_set_bit(__IXGBEVF_DOWN
, &adapter
->state
))
2203 return; /* do nothing if already down */
2205 /* disable all enabled Rx queues */
2206 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2207 ixgbevf_disable_rx_queue(adapter
, adapter
->rx_ring
[i
]);
2209 usleep_range(10000, 20000);
2211 netif_tx_stop_all_queues(netdev
);
2213 /* call carrier off first to avoid false dev_watchdog timeouts */
2214 netif_carrier_off(netdev
);
2215 netif_tx_disable(netdev
);
2217 ixgbevf_irq_disable(adapter
);
2219 ixgbevf_napi_disable_all(adapter
);
2221 del_timer_sync(&adapter
->service_timer
);
2223 /* disable transmits in the hardware now that interrupts are off */
2224 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2225 u8 reg_idx
= adapter
->tx_ring
[i
]->reg_idx
;
2227 IXGBE_WRITE_REG(hw
, IXGBE_VFTXDCTL(reg_idx
),
2228 IXGBE_TXDCTL_SWFLSH
);
2231 if (!pci_channel_offline(adapter
->pdev
))
2232 ixgbevf_reset(adapter
);
2234 ixgbevf_clean_all_tx_rings(adapter
);
2235 ixgbevf_clean_all_rx_rings(adapter
);
2238 void ixgbevf_reinit_locked(struct ixgbevf_adapter
*adapter
)
2240 WARN_ON(in_interrupt());
2242 while (test_and_set_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2245 ixgbevf_down(adapter
);
2246 ixgbevf_up(adapter
);
2248 clear_bit(__IXGBEVF_RESETTING
, &adapter
->state
);
2251 void ixgbevf_reset(struct ixgbevf_adapter
*adapter
)
2253 struct ixgbe_hw
*hw
= &adapter
->hw
;
2254 struct net_device
*netdev
= adapter
->netdev
;
2256 if (hw
->mac
.ops
.reset_hw(hw
)) {
2257 hw_dbg(hw
, "PF still resetting\n");
2259 hw
->mac
.ops
.init_hw(hw
);
2260 ixgbevf_negotiate_api(adapter
);
2263 if (is_valid_ether_addr(adapter
->hw
.mac
.addr
)) {
2264 ether_addr_copy(netdev
->dev_addr
, adapter
->hw
.mac
.addr
);
2265 ether_addr_copy(netdev
->perm_addr
, adapter
->hw
.mac
.addr
);
2268 adapter
->last_reset
= jiffies
;
2271 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter
*adapter
,
2274 int vector_threshold
;
2276 /* We'll want at least 2 (vector_threshold):
2277 * 1) TxQ[0] + RxQ[0] handler
2278 * 2) Other (Link Status Change, etc.)
2280 vector_threshold
= MIN_MSIX_COUNT
;
2282 /* The more we get, the more we will assign to Tx/Rx Cleanup
2283 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2284 * Right now, we simply care about how many we'll get; we'll
2285 * set them up later while requesting irq's.
2287 vectors
= pci_enable_msix_range(adapter
->pdev
, adapter
->msix_entries
,
2288 vector_threshold
, vectors
);
2291 dev_err(&adapter
->pdev
->dev
,
2292 "Unable to allocate MSI-X interrupts\n");
2293 kfree(adapter
->msix_entries
);
2294 adapter
->msix_entries
= NULL
;
2298 /* Adjust for only the vectors we'll use, which is minimum
2299 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2300 * vectors we were allocated.
2302 adapter
->num_msix_vectors
= vectors
;
2308 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2309 * @adapter: board private structure to initialize
2311 * This is the top level queue allocation routine. The order here is very
2312 * important, starting with the "most" number of features turned on at once,
2313 * and ending with the smallest set of features. This way large combinations
2314 * can be allocated if they're turned on, and smaller combinations are the
2315 * fallthrough conditions.
2318 static void ixgbevf_set_num_queues(struct ixgbevf_adapter
*adapter
)
2320 struct ixgbe_hw
*hw
= &adapter
->hw
;
2321 unsigned int def_q
= 0;
2322 unsigned int num_tcs
= 0;
2325 /* Start with base case */
2326 adapter
->num_rx_queues
= 1;
2327 adapter
->num_tx_queues
= 1;
2329 spin_lock_bh(&adapter
->mbx_lock
);
2331 /* fetch queue configuration from the PF */
2332 err
= ixgbevf_get_queues(hw
, &num_tcs
, &def_q
);
2334 spin_unlock_bh(&adapter
->mbx_lock
);
2339 /* we need as many queues as traffic classes */
2341 adapter
->num_rx_queues
= num_tcs
;
2343 u16 rss
= min_t(u16
, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES
);
2345 switch (hw
->api_version
) {
2346 case ixgbe_mbox_api_11
:
2347 case ixgbe_mbox_api_12
:
2348 adapter
->num_rx_queues
= rss
;
2349 adapter
->num_tx_queues
= rss
;
2357 * ixgbevf_alloc_queues - Allocate memory for all rings
2358 * @adapter: board private structure to initialize
2360 * We allocate one ring per queue at run-time since we don't know the
2361 * number of queues at compile-time. The polling_netdev array is
2362 * intended for Multiqueue, but should work fine with a single queue.
2364 static int ixgbevf_alloc_queues(struct ixgbevf_adapter
*adapter
)
2366 struct ixgbevf_ring
*ring
;
2369 for (; tx
< adapter
->num_tx_queues
; tx
++) {
2370 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2372 goto err_allocation
;
2374 ring
->dev
= &adapter
->pdev
->dev
;
2375 ring
->netdev
= adapter
->netdev
;
2376 ring
->count
= adapter
->tx_ring_count
;
2377 ring
->queue_index
= tx
;
2380 adapter
->tx_ring
[tx
] = ring
;
2383 for (; rx
< adapter
->num_rx_queues
; rx
++) {
2384 ring
= kzalloc(sizeof(*ring
), GFP_KERNEL
);
2386 goto err_allocation
;
2388 ring
->dev
= &adapter
->pdev
->dev
;
2389 ring
->netdev
= adapter
->netdev
;
2391 ring
->count
= adapter
->rx_ring_count
;
2392 ring
->queue_index
= rx
;
2395 adapter
->rx_ring
[rx
] = ring
;
2402 kfree(adapter
->tx_ring
[--tx
]);
2403 adapter
->tx_ring
[tx
] = NULL
;
2407 kfree(adapter
->rx_ring
[--rx
]);
2408 adapter
->rx_ring
[rx
] = NULL
;
2414 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2415 * @adapter: board private structure to initialize
2417 * Attempt to configure the interrupts using the best available
2418 * capabilities of the hardware and the kernel.
2420 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2422 struct net_device
*netdev
= adapter
->netdev
;
2424 int vector
, v_budget
;
2426 /* It's easy to be greedy for MSI-X vectors, but it really
2427 * doesn't do us much good if we have a lot more vectors
2428 * than CPU's. So let's be conservative and only ask for
2429 * (roughly) the same number of vectors as there are CPU's.
2430 * The default is to use pairs of vectors.
2432 v_budget
= max(adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2433 v_budget
= min_t(int, v_budget
, num_online_cpus());
2434 v_budget
+= NON_Q_VECTORS
;
2436 /* A failure in MSI-X entry allocation isn't fatal, but it does
2437 * mean we disable MSI-X capabilities of the adapter.
2439 adapter
->msix_entries
= kcalloc(v_budget
,
2440 sizeof(struct msix_entry
), GFP_KERNEL
);
2441 if (!adapter
->msix_entries
)
2444 for (vector
= 0; vector
< v_budget
; vector
++)
2445 adapter
->msix_entries
[vector
].entry
= vector
;
2447 err
= ixgbevf_acquire_msix_vectors(adapter
, v_budget
);
2451 err
= netif_set_real_num_tx_queues(netdev
, adapter
->num_tx_queues
);
2455 return netif_set_real_num_rx_queues(netdev
, adapter
->num_rx_queues
);
2459 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2460 * @adapter: board private structure to initialize
2462 * We allocate one q_vector per queue interrupt. If allocation fails we
2465 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter
*adapter
)
2467 int q_idx
, num_q_vectors
;
2468 struct ixgbevf_q_vector
*q_vector
;
2470 num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2472 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2473 q_vector
= kzalloc(sizeof(struct ixgbevf_q_vector
), GFP_KERNEL
);
2476 q_vector
->adapter
= adapter
;
2477 q_vector
->v_idx
= q_idx
;
2478 netif_napi_add(adapter
->netdev
, &q_vector
->napi
,
2480 #ifdef CONFIG_NET_RX_BUSY_POLL
2481 napi_hash_add(&q_vector
->napi
);
2483 adapter
->q_vector
[q_idx
] = q_vector
;
2491 q_vector
= adapter
->q_vector
[q_idx
];
2492 #ifdef CONFIG_NET_RX_BUSY_POLL
2493 napi_hash_del(&q_vector
->napi
);
2495 netif_napi_del(&q_vector
->napi
);
2497 adapter
->q_vector
[q_idx
] = NULL
;
2503 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2504 * @adapter: board private structure to initialize
2506 * This function frees the memory allocated to the q_vectors. In addition if
2507 * NAPI is enabled it will delete any references to the NAPI struct prior
2508 * to freeing the q_vector.
2510 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter
*adapter
)
2512 int q_idx
, num_q_vectors
= adapter
->num_msix_vectors
- NON_Q_VECTORS
;
2514 for (q_idx
= 0; q_idx
< num_q_vectors
; q_idx
++) {
2515 struct ixgbevf_q_vector
*q_vector
= adapter
->q_vector
[q_idx
];
2517 adapter
->q_vector
[q_idx
] = NULL
;
2518 #ifdef CONFIG_NET_RX_BUSY_POLL
2519 napi_hash_del(&q_vector
->napi
);
2521 netif_napi_del(&q_vector
->napi
);
2527 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2528 * @adapter: board private structure
2531 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter
*adapter
)
2533 pci_disable_msix(adapter
->pdev
);
2534 kfree(adapter
->msix_entries
);
2535 adapter
->msix_entries
= NULL
;
2539 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2540 * @adapter: board private structure to initialize
2543 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2547 /* Number of supported queues */
2548 ixgbevf_set_num_queues(adapter
);
2550 err
= ixgbevf_set_interrupt_capability(adapter
);
2552 hw_dbg(&adapter
->hw
,
2553 "Unable to setup interrupt capabilities\n");
2554 goto err_set_interrupt
;
2557 err
= ixgbevf_alloc_q_vectors(adapter
);
2559 hw_dbg(&adapter
->hw
, "Unable to allocate memory for queue vectors\n");
2560 goto err_alloc_q_vectors
;
2563 err
= ixgbevf_alloc_queues(adapter
);
2565 pr_err("Unable to allocate memory for queues\n");
2566 goto err_alloc_queues
;
2569 hw_dbg(&adapter
->hw
, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
2570 (adapter
->num_rx_queues
> 1) ? "Enabled" :
2571 "Disabled", adapter
->num_rx_queues
, adapter
->num_tx_queues
);
2573 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2577 ixgbevf_free_q_vectors(adapter
);
2578 err_alloc_q_vectors
:
2579 ixgbevf_reset_interrupt_capability(adapter
);
2585 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2586 * @adapter: board private structure to clear interrupt scheme on
2588 * We go through and clear interrupt specific resources and reset the structure
2589 * to pre-load conditions
2591 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter
*adapter
)
2595 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
2596 kfree(adapter
->tx_ring
[i
]);
2597 adapter
->tx_ring
[i
] = NULL
;
2599 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2600 kfree(adapter
->rx_ring
[i
]);
2601 adapter
->rx_ring
[i
] = NULL
;
2604 adapter
->num_tx_queues
= 0;
2605 adapter
->num_rx_queues
= 0;
2607 ixgbevf_free_q_vectors(adapter
);
2608 ixgbevf_reset_interrupt_capability(adapter
);
2612 * ixgbevf_sw_init - Initialize general software structures
2613 * @adapter: board private structure to initialize
2615 * ixgbevf_sw_init initializes the Adapter private data structure.
2616 * Fields are initialized based on PCI device information and
2617 * OS network device settings (MTU size).
2619 static int ixgbevf_sw_init(struct ixgbevf_adapter
*adapter
)
2621 struct ixgbe_hw
*hw
= &adapter
->hw
;
2622 struct pci_dev
*pdev
= adapter
->pdev
;
2623 struct net_device
*netdev
= adapter
->netdev
;
2626 /* PCI config space info */
2627 hw
->vendor_id
= pdev
->vendor
;
2628 hw
->device_id
= pdev
->device
;
2629 hw
->revision_id
= pdev
->revision
;
2630 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
2631 hw
->subsystem_device_id
= pdev
->subsystem_device
;
2633 hw
->mbx
.ops
.init_params(hw
);
2635 /* assume legacy case in which PF would only give VF 2 queues */
2636 hw
->mac
.max_tx_queues
= 2;
2637 hw
->mac
.max_rx_queues
= 2;
2639 /* lock to protect mailbox accesses */
2640 spin_lock_init(&adapter
->mbx_lock
);
2642 err
= hw
->mac
.ops
.reset_hw(hw
);
2644 dev_info(&pdev
->dev
,
2645 "PF still in reset state. Is the PF interface up?\n");
2647 err
= hw
->mac
.ops
.init_hw(hw
);
2649 pr_err("init_shared_code failed: %d\n", err
);
2652 ixgbevf_negotiate_api(adapter
);
2653 err
= hw
->mac
.ops
.get_mac_addr(hw
, hw
->mac
.addr
);
2655 dev_info(&pdev
->dev
, "Error reading MAC address\n");
2656 else if (is_zero_ether_addr(adapter
->hw
.mac
.addr
))
2657 dev_info(&pdev
->dev
,
2658 "MAC address not assigned by administrator.\n");
2659 ether_addr_copy(netdev
->dev_addr
, hw
->mac
.addr
);
2662 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
2663 dev_info(&pdev
->dev
, "Assigning random MAC address\n");
2664 eth_hw_addr_random(netdev
);
2665 ether_addr_copy(hw
->mac
.addr
, netdev
->dev_addr
);
2666 ether_addr_copy(hw
->mac
.perm_addr
, netdev
->dev_addr
);
2669 /* Enable dynamic interrupt throttling rates */
2670 adapter
->rx_itr_setting
= 1;
2671 adapter
->tx_itr_setting
= 1;
2673 /* set default ring sizes */
2674 adapter
->tx_ring_count
= IXGBEVF_DEFAULT_TXD
;
2675 adapter
->rx_ring_count
= IXGBEVF_DEFAULT_RXD
;
2677 set_bit(__IXGBEVF_DOWN
, &adapter
->state
);
2684 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2686 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2687 if (current_counter < last_counter) \
2688 counter += 0x100000000LL; \
2689 last_counter = current_counter; \
2690 counter &= 0xFFFFFFFF00000000LL; \
2691 counter |= current_counter; \
2694 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2696 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2697 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2698 u64 current_counter = (current_counter_msb << 32) | \
2699 current_counter_lsb; \
2700 if (current_counter < last_counter) \
2701 counter += 0x1000000000LL; \
2702 last_counter = current_counter; \
2703 counter &= 0xFFFFFFF000000000LL; \
2704 counter |= current_counter; \
2707 * ixgbevf_update_stats - Update the board statistics counters.
2708 * @adapter: board private structure
2710 void ixgbevf_update_stats(struct ixgbevf_adapter
*adapter
)
2712 struct ixgbe_hw
*hw
= &adapter
->hw
;
2715 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2716 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2719 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC
, adapter
->stats
.last_vfgprc
,
2720 adapter
->stats
.vfgprc
);
2721 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC
, adapter
->stats
.last_vfgptc
,
2722 adapter
->stats
.vfgptc
);
2723 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB
, IXGBE_VFGORC_MSB
,
2724 adapter
->stats
.last_vfgorc
,
2725 adapter
->stats
.vfgorc
);
2726 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB
, IXGBE_VFGOTC_MSB
,
2727 adapter
->stats
.last_vfgotc
,
2728 adapter
->stats
.vfgotc
);
2729 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC
, adapter
->stats
.last_vfmprc
,
2730 adapter
->stats
.vfmprc
);
2732 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
2733 adapter
->hw_csum_rx_error
+=
2734 adapter
->rx_ring
[i
]->hw_csum_rx_error
;
2735 adapter
->rx_ring
[i
]->hw_csum_rx_error
= 0;
2740 * ixgbevf_service_timer - Timer Call-back
2741 * @data: pointer to adapter cast into an unsigned long
2743 static void ixgbevf_service_timer(unsigned long data
)
2745 struct ixgbevf_adapter
*adapter
= (struct ixgbevf_adapter
*)data
;
2747 /* Reset the timer */
2748 mod_timer(&adapter
->service_timer
, (HZ
* 2) + jiffies
);
2750 ixgbevf_service_event_schedule(adapter
);
2753 static void ixgbevf_reset_subtask(struct ixgbevf_adapter
*adapter
)
2755 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
))
2758 /* If we're already down or resetting, just bail */
2759 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2760 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2763 adapter
->tx_timeout_count
++;
2765 ixgbevf_reinit_locked(adapter
);
2769 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
2770 * @adapter: pointer to the device adapter structure
2772 * This function serves two purposes. First it strobes the interrupt lines
2773 * in order to make certain interrupts are occurring. Secondly it sets the
2774 * bits needed to check for TX hangs. As a result we should immediately
2775 * determine if a hang has occurred.
2777 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter
*adapter
)
2779 struct ixgbe_hw
*hw
= &adapter
->hw
;
2783 /* If we're down or resetting, just bail */
2784 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2785 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2788 /* Force detection of hung controller */
2789 if (netif_carrier_ok(adapter
->netdev
)) {
2790 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2791 set_check_for_tx_hang(adapter
->tx_ring
[i
]);
2794 /* get one bit for every active Tx/Rx interrupt vector */
2795 for (i
= 0; i
< adapter
->num_msix_vectors
- NON_Q_VECTORS
; i
++) {
2796 struct ixgbevf_q_vector
*qv
= adapter
->q_vector
[i
];
2798 if (qv
->rx
.ring
|| qv
->tx
.ring
)
2802 /* Cause software interrupt to ensure rings are cleaned */
2803 IXGBE_WRITE_REG(hw
, IXGBE_VTEICS
, eics
);
2807 * ixgbevf_watchdog_update_link - update the link status
2808 * @adapter: pointer to the device adapter structure
2810 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter
*adapter
)
2812 struct ixgbe_hw
*hw
= &adapter
->hw
;
2813 u32 link_speed
= adapter
->link_speed
;
2814 bool link_up
= adapter
->link_up
;
2817 spin_lock_bh(&adapter
->mbx_lock
);
2819 err
= hw
->mac
.ops
.check_link(hw
, &link_speed
, &link_up
, false);
2821 spin_unlock_bh(&adapter
->mbx_lock
);
2823 /* if check for link returns error we will need to reset */
2824 if (err
&& time_after(jiffies
, adapter
->last_reset
+ (10 * HZ
))) {
2825 set_bit(__IXGBEVF_RESET_REQUESTED
, &adapter
->state
);
2829 adapter
->link_up
= link_up
;
2830 adapter
->link_speed
= link_speed
;
2834 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
2835 * print link up message
2836 * @adapter: pointer to the device adapter structure
2838 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter
*adapter
)
2840 struct net_device
*netdev
= adapter
->netdev
;
2842 /* only continue if link was previously down */
2843 if (netif_carrier_ok(netdev
))
2846 dev_info(&adapter
->pdev
->dev
, "NIC Link is Up %s\n",
2847 (adapter
->link_speed
== IXGBE_LINK_SPEED_10GB_FULL
) ?
2849 (adapter
->link_speed
== IXGBE_LINK_SPEED_1GB_FULL
) ?
2851 (adapter
->link_speed
== IXGBE_LINK_SPEED_100_FULL
) ?
2855 netif_carrier_on(netdev
);
2859 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
2860 * print link down message
2861 * @adapter: pointer to the adapter structure
2863 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter
*adapter
)
2865 struct net_device
*netdev
= adapter
->netdev
;
2867 adapter
->link_speed
= 0;
2869 /* only continue if link was up previously */
2870 if (!netif_carrier_ok(netdev
))
2873 dev_info(&adapter
->pdev
->dev
, "NIC Link is Down\n");
2875 netif_carrier_off(netdev
);
2879 * ixgbevf_watchdog_subtask - worker thread to bring link up
2880 * @work: pointer to work_struct containing our data
2882 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter
*adapter
)
2884 /* if interface is down do nothing */
2885 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
2886 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
2889 ixgbevf_watchdog_update_link(adapter
);
2891 if (adapter
->link_up
)
2892 ixgbevf_watchdog_link_is_up(adapter
);
2894 ixgbevf_watchdog_link_is_down(adapter
);
2896 ixgbevf_update_stats(adapter
);
2900 * ixgbevf_service_task - manages and runs subtasks
2901 * @work: pointer to work_struct containing our data
2903 static void ixgbevf_service_task(struct work_struct
*work
)
2905 struct ixgbevf_adapter
*adapter
= container_of(work
,
2906 struct ixgbevf_adapter
,
2908 struct ixgbe_hw
*hw
= &adapter
->hw
;
2910 if (IXGBE_REMOVED(hw
->hw_addr
)) {
2911 if (!test_bit(__IXGBEVF_DOWN
, &adapter
->state
)) {
2913 ixgbevf_down(adapter
);
2919 ixgbevf_queue_reset_subtask(adapter
);
2920 ixgbevf_reset_subtask(adapter
);
2921 ixgbevf_watchdog_subtask(adapter
);
2922 ixgbevf_check_hang_subtask(adapter
);
2924 ixgbevf_service_event_complete(adapter
);
2928 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2929 * @tx_ring: Tx descriptor ring for a specific queue
2931 * Free all transmit software resources
2933 void ixgbevf_free_tx_resources(struct ixgbevf_ring
*tx_ring
)
2935 ixgbevf_clean_tx_ring(tx_ring
);
2937 vfree(tx_ring
->tx_buffer_info
);
2938 tx_ring
->tx_buffer_info
= NULL
;
2940 /* if not set, then don't free */
2944 dma_free_coherent(tx_ring
->dev
, tx_ring
->size
, tx_ring
->desc
,
2947 tx_ring
->desc
= NULL
;
2951 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2952 * @adapter: board private structure
2954 * Free all transmit software resources
2956 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter
*adapter
)
2960 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2961 if (adapter
->tx_ring
[i
]->desc
)
2962 ixgbevf_free_tx_resources(adapter
->tx_ring
[i
]);
2966 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2967 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
2969 * Return 0 on success, negative on failure
2971 int ixgbevf_setup_tx_resources(struct ixgbevf_ring
*tx_ring
)
2975 size
= sizeof(struct ixgbevf_tx_buffer
) * tx_ring
->count
;
2976 tx_ring
->tx_buffer_info
= vzalloc(size
);
2977 if (!tx_ring
->tx_buffer_info
)
2980 /* round up to nearest 4K */
2981 tx_ring
->size
= tx_ring
->count
* sizeof(union ixgbe_adv_tx_desc
);
2982 tx_ring
->size
= ALIGN(tx_ring
->size
, 4096);
2984 tx_ring
->desc
= dma_alloc_coherent(tx_ring
->dev
, tx_ring
->size
,
2985 &tx_ring
->dma
, GFP_KERNEL
);
2992 vfree(tx_ring
->tx_buffer_info
);
2993 tx_ring
->tx_buffer_info
= NULL
;
2994 hw_dbg(&adapter
->hw
, "Unable to allocate memory for the transmit descriptor ring\n");
2999 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3000 * @adapter: board private structure
3002 * If this function returns with an error, then it's possible one or
3003 * more of the rings is populated (while the rest are not). It is the
3004 * callers duty to clean those orphaned rings.
3006 * Return 0 on success, negative on failure
3008 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter
*adapter
)
3012 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3013 err
= ixgbevf_setup_tx_resources(adapter
->tx_ring
[i
]);
3016 hw_dbg(&adapter
->hw
, "Allocation for Tx Queue %u failed\n", i
);
3024 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3025 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3027 * Returns 0 on success, negative on failure
3029 int ixgbevf_setup_rx_resources(struct ixgbevf_ring
*rx_ring
)
3033 size
= sizeof(struct ixgbevf_rx_buffer
) * rx_ring
->count
;
3034 rx_ring
->rx_buffer_info
= vzalloc(size
);
3035 if (!rx_ring
->rx_buffer_info
)
3038 /* Round up to nearest 4K */
3039 rx_ring
->size
= rx_ring
->count
* sizeof(union ixgbe_adv_rx_desc
);
3040 rx_ring
->size
= ALIGN(rx_ring
->size
, 4096);
3042 rx_ring
->desc
= dma_alloc_coherent(rx_ring
->dev
, rx_ring
->size
,
3043 &rx_ring
->dma
, GFP_KERNEL
);
3050 vfree(rx_ring
->rx_buffer_info
);
3051 rx_ring
->rx_buffer_info
= NULL
;
3052 dev_err(rx_ring
->dev
, "Unable to allocate memory for the Rx descriptor ring\n");
3057 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3058 * @adapter: board private structure
3060 * If this function returns with an error, then it's possible one or
3061 * more of the rings is populated (while the rest are not). It is the
3062 * callers duty to clean those orphaned rings.
3064 * Return 0 on success, negative on failure
3066 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3070 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3071 err
= ixgbevf_setup_rx_resources(adapter
->rx_ring
[i
]);
3074 hw_dbg(&adapter
->hw
, "Allocation for Rx Queue %u failed\n", i
);
3081 * ixgbevf_free_rx_resources - Free Rx Resources
3082 * @rx_ring: ring to clean the resources from
3084 * Free all receive software resources
3086 void ixgbevf_free_rx_resources(struct ixgbevf_ring
*rx_ring
)
3088 ixgbevf_clean_rx_ring(rx_ring
);
3090 vfree(rx_ring
->rx_buffer_info
);
3091 rx_ring
->rx_buffer_info
= NULL
;
3093 dma_free_coherent(rx_ring
->dev
, rx_ring
->size
, rx_ring
->desc
,
3096 rx_ring
->desc
= NULL
;
3100 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3101 * @adapter: board private structure
3103 * Free all receive software resources
3105 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter
*adapter
)
3109 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3110 if (adapter
->rx_ring
[i
]->desc
)
3111 ixgbevf_free_rx_resources(adapter
->rx_ring
[i
]);
3115 * ixgbevf_open - Called when a network interface is made active
3116 * @netdev: network interface device structure
3118 * Returns 0 on success, negative value on failure
3120 * The open entry point is called when a network interface is made
3121 * active by the system (IFF_UP). At this point all resources needed
3122 * for transmit and receive operations are allocated, the interrupt
3123 * handler is registered with the OS, the watchdog timer is started,
3124 * and the stack is notified that the interface is ready.
3126 int ixgbevf_open(struct net_device
*netdev
)
3128 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3129 struct ixgbe_hw
*hw
= &adapter
->hw
;
3132 /* A previous failure to open the device because of a lack of
3133 * available MSIX vector resources may have reset the number
3134 * of msix vectors variable to zero. The only way to recover
3135 * is to unload/reload the driver and hope that the system has
3136 * been able to recover some MSIX vector resources.
3138 if (!adapter
->num_msix_vectors
)
3141 if (hw
->adapter_stopped
) {
3142 ixgbevf_reset(adapter
);
3143 /* if adapter is still stopped then PF isn't up and
3144 * the VF can't start.
3146 if (hw
->adapter_stopped
) {
3147 err
= IXGBE_ERR_MBX
;
3148 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3149 goto err_setup_reset
;
3153 /* disallow open during test */
3154 if (test_bit(__IXGBEVF_TESTING
, &adapter
->state
))
3157 netif_carrier_off(netdev
);
3159 /* allocate transmit descriptors */
3160 err
= ixgbevf_setup_all_tx_resources(adapter
);
3164 /* allocate receive descriptors */
3165 err
= ixgbevf_setup_all_rx_resources(adapter
);
3169 ixgbevf_configure(adapter
);
3171 /* Map the Tx/Rx rings to the vectors we were allotted.
3172 * if request_irq will be called in this function map_rings
3173 * must be called *before* up_complete
3175 ixgbevf_map_rings_to_vectors(adapter
);
3177 err
= ixgbevf_request_irq(adapter
);
3181 ixgbevf_up_complete(adapter
);
3186 ixgbevf_down(adapter
);
3188 ixgbevf_free_all_rx_resources(adapter
);
3190 ixgbevf_free_all_tx_resources(adapter
);
3191 ixgbevf_reset(adapter
);
3199 * ixgbevf_close - Disables a network interface
3200 * @netdev: network interface device structure
3202 * Returns 0, this is not allowed to fail
3204 * The close entry point is called when an interface is de-activated
3205 * by the OS. The hardware is still under the drivers control, but
3206 * needs to be disabled. A global MAC reset is issued to stop the
3207 * hardware, and all transmit and receive resources are freed.
3209 int ixgbevf_close(struct net_device
*netdev
)
3211 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3213 ixgbevf_down(adapter
);
3214 ixgbevf_free_irq(adapter
);
3216 ixgbevf_free_all_tx_resources(adapter
);
3217 ixgbevf_free_all_rx_resources(adapter
);
3222 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter
*adapter
)
3224 struct net_device
*dev
= adapter
->netdev
;
3226 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED
,
3230 /* if interface is down do nothing */
3231 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
) ||
3232 test_bit(__IXGBEVF_RESETTING
, &adapter
->state
))
3235 /* Hardware has to reinitialize queues and interrupts to
3236 * match packet buffer alignment. Unfortunately, the
3237 * hardware is not flexible enough to do this dynamically.
3239 if (netif_running(dev
))
3242 ixgbevf_clear_interrupt_scheme(adapter
);
3243 ixgbevf_init_interrupt_scheme(adapter
);
3245 if (netif_running(dev
))
3249 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring
*tx_ring
,
3250 u32 vlan_macip_lens
, u32 type_tucmd
,
3253 struct ixgbe_adv_tx_context_desc
*context_desc
;
3254 u16 i
= tx_ring
->next_to_use
;
3256 context_desc
= IXGBEVF_TX_CTXTDESC(tx_ring
, i
);
3259 tx_ring
->next_to_use
= (i
< tx_ring
->count
) ? i
: 0;
3261 /* set bits to identify this as an advanced context descriptor */
3262 type_tucmd
|= IXGBE_TXD_CMD_DEXT
| IXGBE_ADVTXD_DTYP_CTXT
;
3264 context_desc
->vlan_macip_lens
= cpu_to_le32(vlan_macip_lens
);
3265 context_desc
->seqnum_seed
= 0;
3266 context_desc
->type_tucmd_mlhl
= cpu_to_le32(type_tucmd
);
3267 context_desc
->mss_l4len_idx
= cpu_to_le32(mss_l4len_idx
);
3270 static int ixgbevf_tso(struct ixgbevf_ring
*tx_ring
,
3271 struct ixgbevf_tx_buffer
*first
,
3274 struct sk_buff
*skb
= first
->skb
;
3275 u32 vlan_macip_lens
, type_tucmd
;
3276 u32 mss_l4len_idx
, l4len
;
3279 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3282 if (!skb_is_gso(skb
))
3285 err
= skb_cow_head(skb
, 0);
3289 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3290 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3292 if (first
->protocol
== htons(ETH_P_IP
)) {
3293 struct iphdr
*iph
= ip_hdr(skb
);
3297 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
3301 type_tucmd
|= IXGBE_ADVTXD_TUCMD_IPV4
;
3302 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3303 IXGBE_TX_FLAGS_CSUM
|
3304 IXGBE_TX_FLAGS_IPV4
;
3305 } else if (skb_is_gso_v6(skb
)) {
3306 ipv6_hdr(skb
)->payload_len
= 0;
3307 tcp_hdr(skb
)->check
=
3308 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
3309 &ipv6_hdr(skb
)->daddr
,
3311 first
->tx_flags
|= IXGBE_TX_FLAGS_TSO
|
3312 IXGBE_TX_FLAGS_CSUM
;
3315 /* compute header lengths */
3316 l4len
= tcp_hdrlen(skb
);
3318 *hdr_len
= skb_transport_offset(skb
) + l4len
;
3320 /* update GSO size and bytecount with header size */
3321 first
->gso_segs
= skb_shinfo(skb
)->gso_segs
;
3322 first
->bytecount
+= (first
->gso_segs
- 1) * *hdr_len
;
3324 /* mss_l4len_id: use 1 as index for TSO */
3325 mss_l4len_idx
= l4len
<< IXGBE_ADVTXD_L4LEN_SHIFT
;
3326 mss_l4len_idx
|= skb_shinfo(skb
)->gso_size
<< IXGBE_ADVTXD_MSS_SHIFT
;
3327 mss_l4len_idx
|= 1 << IXGBE_ADVTXD_IDX_SHIFT
;
3329 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3330 vlan_macip_lens
= skb_network_header_len(skb
);
3331 vlan_macip_lens
|= skb_network_offset(skb
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3332 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3334 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
,
3335 type_tucmd
, mss_l4len_idx
);
3340 static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff
*skb
)
3342 unsigned int offset
= 0;
3344 ipv6_find_hdr(skb
, &offset
, IPPROTO_SCTP
, NULL
, NULL
);
3346 return offset
== skb_checksum_start_offset(skb
);
3349 static void ixgbevf_tx_csum(struct ixgbevf_ring
*tx_ring
,
3350 struct ixgbevf_tx_buffer
*first
)
3352 struct sk_buff
*skb
= first
->skb
;
3353 u32 vlan_macip_lens
= 0;
3356 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
3359 switch (skb
->csum_offset
) {
3360 case offsetof(struct tcphdr
, check
):
3361 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_TCP
;
3363 case offsetof(struct udphdr
, check
):
3365 case offsetof(struct sctphdr
, checksum
):
3366 /* validate that this is actually an SCTP request */
3367 if (((first
->protocol
== htons(ETH_P_IP
)) &&
3368 (ip_hdr(skb
)->protocol
== IPPROTO_SCTP
)) ||
3369 ((first
->protocol
== htons(ETH_P_IPV6
)) &&
3370 ixgbevf_ipv6_csum_is_sctp(skb
))) {
3371 type_tucmd
= IXGBE_ADVTXD_TUCMD_L4T_SCTP
;
3376 skb_checksum_help(skb
);
3379 /* update TX checksum flag */
3380 first
->tx_flags
|= IXGBE_TX_FLAGS_CSUM
;
3381 vlan_macip_lens
= skb_checksum_start_offset(skb
) -
3382 skb_network_offset(skb
);
3384 /* vlan_macip_lens: MACLEN, VLAN tag */
3385 vlan_macip_lens
|= skb_network_offset(skb
) << IXGBE_ADVTXD_MACLEN_SHIFT
;
3386 vlan_macip_lens
|= first
->tx_flags
& IXGBE_TX_FLAGS_VLAN_MASK
;
3388 ixgbevf_tx_ctxtdesc(tx_ring
, vlan_macip_lens
, type_tucmd
, 0);
3391 static __le32
ixgbevf_tx_cmd_type(u32 tx_flags
)
3393 /* set type for advanced descriptor with frame checksum insertion */
3394 __le32 cmd_type
= cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA
|
3395 IXGBE_ADVTXD_DCMD_IFCS
|
3396 IXGBE_ADVTXD_DCMD_DEXT
);
3398 /* set HW VLAN bit if VLAN is present */
3399 if (tx_flags
& IXGBE_TX_FLAGS_VLAN
)
3400 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE
);
3402 /* set segmentation enable bits for TSO/FSO */
3403 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3404 cmd_type
|= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE
);
3409 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc
*tx_desc
,
3410 u32 tx_flags
, unsigned int paylen
)
3412 __le32 olinfo_status
= cpu_to_le32(paylen
<< IXGBE_ADVTXD_PAYLEN_SHIFT
);
3414 /* enable L4 checksum for TSO and TX checksum offload */
3415 if (tx_flags
& IXGBE_TX_FLAGS_CSUM
)
3416 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM
);
3418 /* enble IPv4 checksum for TSO */
3419 if (tx_flags
& IXGBE_TX_FLAGS_IPV4
)
3420 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM
);
3422 /* use index 1 context for TSO/FSO/FCOE */
3423 if (tx_flags
& IXGBE_TX_FLAGS_TSO
)
3424 olinfo_status
|= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT
);
3426 /* Check Context must be set if Tx switch is enabled, which it
3427 * always is for case where virtual functions are running
3429 olinfo_status
|= cpu_to_le32(IXGBE_ADVTXD_CC
);
3431 tx_desc
->read
.olinfo_status
= olinfo_status
;
3434 static void ixgbevf_tx_map(struct ixgbevf_ring
*tx_ring
,
3435 struct ixgbevf_tx_buffer
*first
,
3439 struct sk_buff
*skb
= first
->skb
;
3440 struct ixgbevf_tx_buffer
*tx_buffer
;
3441 union ixgbe_adv_tx_desc
*tx_desc
;
3442 struct skb_frag_struct
*frag
= &skb_shinfo(skb
)->frags
[0];
3443 unsigned int data_len
= skb
->data_len
;
3444 unsigned int size
= skb_headlen(skb
);
3445 unsigned int paylen
= skb
->len
- hdr_len
;
3446 u32 tx_flags
= first
->tx_flags
;
3448 u16 i
= tx_ring
->next_to_use
;
3450 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, i
);
3452 ixgbevf_tx_olinfo_status(tx_desc
, tx_flags
, paylen
);
3453 cmd_type
= ixgbevf_tx_cmd_type(tx_flags
);
3455 dma
= dma_map_single(tx_ring
->dev
, skb
->data
, size
, DMA_TO_DEVICE
);
3456 if (dma_mapping_error(tx_ring
->dev
, dma
))
3459 /* record length, and DMA address */
3460 dma_unmap_len_set(first
, len
, size
);
3461 dma_unmap_addr_set(first
, dma
, dma
);
3463 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3466 while (unlikely(size
> IXGBE_MAX_DATA_PER_TXD
)) {
3467 tx_desc
->read
.cmd_type_len
=
3468 cmd_type
| cpu_to_le32(IXGBE_MAX_DATA_PER_TXD
);
3472 if (i
== tx_ring
->count
) {
3473 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3477 dma
+= IXGBE_MAX_DATA_PER_TXD
;
3478 size
-= IXGBE_MAX_DATA_PER_TXD
;
3480 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3481 tx_desc
->read
.olinfo_status
= 0;
3484 if (likely(!data_len
))
3487 tx_desc
->read
.cmd_type_len
= cmd_type
| cpu_to_le32(size
);
3491 if (i
== tx_ring
->count
) {
3492 tx_desc
= IXGBEVF_TX_DESC(tx_ring
, 0);
3496 size
= skb_frag_size(frag
);
3499 dma
= skb_frag_dma_map(tx_ring
->dev
, frag
, 0, size
,
3501 if (dma_mapping_error(tx_ring
->dev
, dma
))
3504 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3505 dma_unmap_len_set(tx_buffer
, len
, size
);
3506 dma_unmap_addr_set(tx_buffer
, dma
, dma
);
3508 tx_desc
->read
.buffer_addr
= cpu_to_le64(dma
);
3509 tx_desc
->read
.olinfo_status
= 0;
3514 /* write last descriptor with RS and EOP bits */
3515 cmd_type
|= cpu_to_le32(size
) | cpu_to_le32(IXGBE_TXD_CMD
);
3516 tx_desc
->read
.cmd_type_len
= cmd_type
;
3518 /* set the timestamp */
3519 first
->time_stamp
= jiffies
;
3521 /* Force memory writes to complete before letting h/w know there
3522 * are new descriptors to fetch. (Only applicable for weak-ordered
3523 * memory model archs, such as IA-64).
3525 * We also need this memory barrier (wmb) to make certain all of the
3526 * status bits have been updated before next_to_watch is written.
3530 /* set next_to_watch value indicating a packet is present */
3531 first
->next_to_watch
= tx_desc
;
3534 if (i
== tx_ring
->count
)
3537 tx_ring
->next_to_use
= i
;
3539 /* notify HW of packet */
3540 ixgbevf_write_tail(tx_ring
, i
);
3544 dev_err(tx_ring
->dev
, "TX DMA map failed\n");
3546 /* clear dma mappings for failed tx_buffer_info map */
3548 tx_buffer
= &tx_ring
->tx_buffer_info
[i
];
3549 ixgbevf_unmap_and_free_tx_resource(tx_ring
, tx_buffer
);
3550 if (tx_buffer
== first
)
3557 tx_ring
->next_to_use
= i
;
3560 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3562 netif_stop_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3563 /* Herbert's original patch had:
3564 * smp_mb__after_netif_stop_queue();
3565 * but since that doesn't exist yet, just open code it.
3569 /* We need to check again in a case another CPU has just
3570 * made room available.
3572 if (likely(ixgbevf_desc_unused(tx_ring
) < size
))
3575 /* A reprieve! - use start_queue because it doesn't call schedule */
3576 netif_start_subqueue(tx_ring
->netdev
, tx_ring
->queue_index
);
3577 ++tx_ring
->tx_stats
.restart_queue
;
3582 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring
*tx_ring
, int size
)
3584 if (likely(ixgbevf_desc_unused(tx_ring
) >= size
))
3586 return __ixgbevf_maybe_stop_tx(tx_ring
, size
);
3589 static int ixgbevf_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
3591 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3592 struct ixgbevf_tx_buffer
*first
;
3593 struct ixgbevf_ring
*tx_ring
;
3596 u16 count
= TXD_USE_COUNT(skb_headlen(skb
));
3597 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3601 u8
*dst_mac
= skb_header_pointer(skb
, 0, 0, NULL
);
3603 if (!dst_mac
|| is_link_local_ether_addr(dst_mac
)) {
3604 dev_kfree_skb_any(skb
);
3605 return NETDEV_TX_OK
;
3608 tx_ring
= adapter
->tx_ring
[skb
->queue_mapping
];
3610 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3611 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3612 * + 2 desc gap to keep tail from touching head,
3613 * + 1 desc for context descriptor,
3614 * otherwise try next time
3616 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3617 for (f
= 0; f
< skb_shinfo(skb
)->nr_frags
; f
++)
3618 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
);
3620 count
+= skb_shinfo(skb
)->nr_frags
;
3622 if (ixgbevf_maybe_stop_tx(tx_ring
, count
+ 3)) {
3623 tx_ring
->tx_stats
.tx_busy
++;
3624 return NETDEV_TX_BUSY
;
3627 /* record the location of the first descriptor for this packet */
3628 first
= &tx_ring
->tx_buffer_info
[tx_ring
->next_to_use
];
3630 first
->bytecount
= skb
->len
;
3631 first
->gso_segs
= 1;
3633 if (skb_vlan_tag_present(skb
)) {
3634 tx_flags
|= skb_vlan_tag_get(skb
);
3635 tx_flags
<<= IXGBE_TX_FLAGS_VLAN_SHIFT
;
3636 tx_flags
|= IXGBE_TX_FLAGS_VLAN
;
3639 /* record initial flags and protocol */
3640 first
->tx_flags
= tx_flags
;
3641 first
->protocol
= vlan_get_protocol(skb
);
3643 tso
= ixgbevf_tso(tx_ring
, first
, &hdr_len
);
3647 ixgbevf_tx_csum(tx_ring
, first
);
3649 ixgbevf_tx_map(tx_ring
, first
, hdr_len
);
3651 ixgbevf_maybe_stop_tx(tx_ring
, DESC_NEEDED
);
3653 return NETDEV_TX_OK
;
3656 dev_kfree_skb_any(first
->skb
);
3659 return NETDEV_TX_OK
;
3663 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3664 * @netdev: network interface device structure
3665 * @p: pointer to an address structure
3667 * Returns 0 on success, negative on failure
3669 static int ixgbevf_set_mac(struct net_device
*netdev
, void *p
)
3671 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3672 struct ixgbe_hw
*hw
= &adapter
->hw
;
3673 struct sockaddr
*addr
= p
;
3676 if (!is_valid_ether_addr(addr
->sa_data
))
3677 return -EADDRNOTAVAIL
;
3679 spin_lock_bh(&adapter
->mbx_lock
);
3681 err
= hw
->mac
.ops
.set_rar(hw
, 0, addr
->sa_data
, 0);
3683 spin_unlock_bh(&adapter
->mbx_lock
);
3688 ether_addr_copy(hw
->mac
.addr
, addr
->sa_data
);
3689 ether_addr_copy(netdev
->dev_addr
, addr
->sa_data
);
3695 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3696 * @netdev: network interface device structure
3697 * @new_mtu: new value for maximum frame size
3699 * Returns 0 on success, negative on failure
3701 static int ixgbevf_change_mtu(struct net_device
*netdev
, int new_mtu
)
3703 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3704 struct ixgbe_hw
*hw
= &adapter
->hw
;
3705 int max_frame
= new_mtu
+ ETH_HLEN
+ ETH_FCS_LEN
;
3706 int max_possible_frame
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3708 switch (adapter
->hw
.api_version
) {
3709 case ixgbe_mbox_api_11
:
3710 case ixgbe_mbox_api_12
:
3711 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3714 if (adapter
->hw
.mac
.type
!= ixgbe_mac_82599_vf
)
3715 max_possible_frame
= IXGBE_MAX_JUMBO_FRAME_SIZE
;
3719 /* MTU < 68 is an error and causes problems on some kernels */
3720 if ((new_mtu
< 68) || (max_frame
> max_possible_frame
))
3723 hw_dbg(hw
, "changing MTU from %d to %d\n",
3724 netdev
->mtu
, new_mtu
);
3725 /* must set new MTU before calling down or up */
3726 netdev
->mtu
= new_mtu
;
3728 /* notify the PF of our intent to use this size of frame */
3729 ixgbevf_rlpml_set_vf(hw
, max_frame
);
3734 #ifdef CONFIG_NET_POLL_CONTROLLER
3735 /* Polling 'interrupt' - used by things like netconsole to send skbs
3736 * without having to re-enable interrupts. It's not called while
3737 * the interrupt routine is executing.
3739 static void ixgbevf_netpoll(struct net_device
*netdev
)
3741 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3744 /* if interface is down do nothing */
3745 if (test_bit(__IXGBEVF_DOWN
, &adapter
->state
))
3747 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
3748 ixgbevf_msix_clean_rings(0, adapter
->q_vector
[i
]);
3750 #endif /* CONFIG_NET_POLL_CONTROLLER */
3752 static int ixgbevf_suspend(struct pci_dev
*pdev
, pm_message_t state
)
3754 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3755 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3760 netif_device_detach(netdev
);
3762 if (netif_running(netdev
)) {
3764 ixgbevf_down(adapter
);
3765 ixgbevf_free_irq(adapter
);
3766 ixgbevf_free_all_tx_resources(adapter
);
3767 ixgbevf_free_all_rx_resources(adapter
);
3771 ixgbevf_clear_interrupt_scheme(adapter
);
3774 retval
= pci_save_state(pdev
);
3779 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
3780 pci_disable_device(pdev
);
3786 static int ixgbevf_resume(struct pci_dev
*pdev
)
3788 struct net_device
*netdev
= pci_get_drvdata(pdev
);
3789 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3792 pci_restore_state(pdev
);
3793 /* pci_restore_state clears dev->state_saved so call
3794 * pci_save_state to restore it.
3796 pci_save_state(pdev
);
3798 err
= pci_enable_device_mem(pdev
);
3800 dev_err(&pdev
->dev
, "Cannot enable PCI device from suspend\n");
3803 smp_mb__before_atomic();
3804 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
3805 pci_set_master(pdev
);
3807 ixgbevf_reset(adapter
);
3810 err
= ixgbevf_init_interrupt_scheme(adapter
);
3813 dev_err(&pdev
->dev
, "Cannot initialize interrupts\n");
3817 if (netif_running(netdev
)) {
3818 err
= ixgbevf_open(netdev
);
3823 netif_device_attach(netdev
);
3828 #endif /* CONFIG_PM */
3829 static void ixgbevf_shutdown(struct pci_dev
*pdev
)
3831 ixgbevf_suspend(pdev
, PMSG_SUSPEND
);
3834 static struct rtnl_link_stats64
*ixgbevf_get_stats(struct net_device
*netdev
,
3835 struct rtnl_link_stats64
*stats
)
3837 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
3840 const struct ixgbevf_ring
*ring
;
3843 ixgbevf_update_stats(adapter
);
3845 stats
->multicast
= adapter
->stats
.vfmprc
- adapter
->stats
.base_vfmprc
;
3847 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
3848 ring
= adapter
->rx_ring
[i
];
3850 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3851 bytes
= ring
->stats
.bytes
;
3852 packets
= ring
->stats
.packets
;
3853 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3854 stats
->rx_bytes
+= bytes
;
3855 stats
->rx_packets
+= packets
;
3858 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
3859 ring
= adapter
->tx_ring
[i
];
3861 start
= u64_stats_fetch_begin_irq(&ring
->syncp
);
3862 bytes
= ring
->stats
.bytes
;
3863 packets
= ring
->stats
.packets
;
3864 } while (u64_stats_fetch_retry_irq(&ring
->syncp
, start
));
3865 stats
->tx_bytes
+= bytes
;
3866 stats
->tx_packets
+= packets
;
3872 static const struct net_device_ops ixgbevf_netdev_ops
= {
3873 .ndo_open
= ixgbevf_open
,
3874 .ndo_stop
= ixgbevf_close
,
3875 .ndo_start_xmit
= ixgbevf_xmit_frame
,
3876 .ndo_set_rx_mode
= ixgbevf_set_rx_mode
,
3877 .ndo_get_stats64
= ixgbevf_get_stats
,
3878 .ndo_validate_addr
= eth_validate_addr
,
3879 .ndo_set_mac_address
= ixgbevf_set_mac
,
3880 .ndo_change_mtu
= ixgbevf_change_mtu
,
3881 .ndo_tx_timeout
= ixgbevf_tx_timeout
,
3882 .ndo_vlan_rx_add_vid
= ixgbevf_vlan_rx_add_vid
,
3883 .ndo_vlan_rx_kill_vid
= ixgbevf_vlan_rx_kill_vid
,
3884 #ifdef CONFIG_NET_RX_BUSY_POLL
3885 .ndo_busy_poll
= ixgbevf_busy_poll_recv
,
3887 #ifdef CONFIG_NET_POLL_CONTROLLER
3888 .ndo_poll_controller
= ixgbevf_netpoll
,
3890 .ndo_features_check
= passthru_features_check
,
3893 static void ixgbevf_assign_netdev_ops(struct net_device
*dev
)
3895 dev
->netdev_ops
= &ixgbevf_netdev_ops
;
3896 ixgbevf_set_ethtool_ops(dev
);
3897 dev
->watchdog_timeo
= 5 * HZ
;
3901 * ixgbevf_probe - Device Initialization Routine
3902 * @pdev: PCI device information struct
3903 * @ent: entry in ixgbevf_pci_tbl
3905 * Returns 0 on success, negative on failure
3907 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3908 * The OS initialization, configuring of the adapter private structure,
3909 * and a hardware reset occur.
3911 static int ixgbevf_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
3913 struct net_device
*netdev
;
3914 struct ixgbevf_adapter
*adapter
= NULL
;
3915 struct ixgbe_hw
*hw
= NULL
;
3916 const struct ixgbevf_info
*ii
= ixgbevf_info_tbl
[ent
->driver_data
];
3917 int err
, pci_using_dac
;
3918 bool disable_dev
= false;
3920 err
= pci_enable_device(pdev
);
3924 if (!dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64))) {
3927 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
3929 dev_err(&pdev
->dev
, "No usable DMA configuration, aborting\n");
3935 err
= pci_request_regions(pdev
, ixgbevf_driver_name
);
3937 dev_err(&pdev
->dev
, "pci_request_regions failed 0x%x\n", err
);
3941 pci_set_master(pdev
);
3943 netdev
= alloc_etherdev_mq(sizeof(struct ixgbevf_adapter
),
3947 goto err_alloc_etherdev
;
3950 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
3952 adapter
= netdev_priv(netdev
);
3954 adapter
->netdev
= netdev
;
3955 adapter
->pdev
= pdev
;
3958 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
3960 /* call save state here in standalone driver because it relies on
3961 * adapter struct to exist, and needs to call netdev_priv
3963 pci_save_state(pdev
);
3965 hw
->hw_addr
= ioremap(pci_resource_start(pdev
, 0),
3966 pci_resource_len(pdev
, 0));
3967 adapter
->io_addr
= hw
->hw_addr
;
3973 ixgbevf_assign_netdev_ops(netdev
);
3976 memcpy(&hw
->mac
.ops
, ii
->mac_ops
, sizeof(hw
->mac
.ops
));
3977 hw
->mac
.type
= ii
->mac
;
3979 memcpy(&hw
->mbx
.ops
, &ixgbevf_mbx_ops
,
3980 sizeof(struct ixgbe_mbx_operations
));
3982 /* setup the private structure */
3983 err
= ixgbevf_sw_init(adapter
);
3987 /* The HW MAC address was set and/or determined in sw_init */
3988 if (!is_valid_ether_addr(netdev
->dev_addr
)) {
3989 pr_err("invalid MAC address\n");
3994 netdev
->hw_features
= NETIF_F_SG
|
4001 netdev
->features
= netdev
->hw_features
|
4002 NETIF_F_HW_VLAN_CTAG_TX
|
4003 NETIF_F_HW_VLAN_CTAG_RX
|
4004 NETIF_F_HW_VLAN_CTAG_FILTER
;
4006 netdev
->vlan_features
|= NETIF_F_SG
|
4012 netdev
->mpls_features
|= NETIF_F_HW_CSUM
;
4013 netdev
->hw_enc_features
|= NETIF_F_HW_CSUM
;
4016 netdev
->features
|= NETIF_F_HIGHDMA
;
4018 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
4020 if (IXGBE_REMOVED(hw
->hw_addr
)) {
4025 setup_timer(&adapter
->service_timer
, &ixgbevf_service_timer
,
4026 (unsigned long)adapter
);
4028 INIT_WORK(&adapter
->service_task
, ixgbevf_service_task
);
4029 set_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
);
4030 clear_bit(__IXGBEVF_SERVICE_SCHED
, &adapter
->state
);
4032 err
= ixgbevf_init_interrupt_scheme(adapter
);
4036 strcpy(netdev
->name
, "eth%d");
4038 err
= register_netdev(netdev
);
4042 pci_set_drvdata(pdev
, netdev
);
4043 netif_carrier_off(netdev
);
4045 ixgbevf_init_last_counter_stats(adapter
);
4047 /* print the VF info */
4048 dev_info(&pdev
->dev
, "%pM\n", netdev
->dev_addr
);
4049 dev_info(&pdev
->dev
, "MAC: %d\n", hw
->mac
.type
);
4051 switch (hw
->mac
.type
) {
4052 case ixgbe_mac_X550_vf
:
4053 dev_info(&pdev
->dev
, "Intel(R) X550 Virtual Function\n");
4055 case ixgbe_mac_X540_vf
:
4056 dev_info(&pdev
->dev
, "Intel(R) X540 Virtual Function\n");
4058 case ixgbe_mac_82599_vf
:
4060 dev_info(&pdev
->dev
, "Intel(R) 82599 Virtual Function\n");
4067 ixgbevf_clear_interrupt_scheme(adapter
);
4069 ixgbevf_reset_interrupt_capability(adapter
);
4070 iounmap(adapter
->io_addr
);
4072 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4073 free_netdev(netdev
);
4075 pci_release_regions(pdev
);
4078 if (!adapter
|| disable_dev
)
4079 pci_disable_device(pdev
);
4084 * ixgbevf_remove - Device Removal Routine
4085 * @pdev: PCI device information struct
4087 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4088 * that it should release a PCI device. The could be caused by a
4089 * Hot-Plug event, or because the driver is going to be removed from
4092 static void ixgbevf_remove(struct pci_dev
*pdev
)
4094 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4095 struct ixgbevf_adapter
*adapter
;
4101 adapter
= netdev_priv(netdev
);
4103 set_bit(__IXGBEVF_REMOVING
, &adapter
->state
);
4104 cancel_work_sync(&adapter
->service_task
);
4106 if (netdev
->reg_state
== NETREG_REGISTERED
)
4107 unregister_netdev(netdev
);
4109 ixgbevf_clear_interrupt_scheme(adapter
);
4110 ixgbevf_reset_interrupt_capability(adapter
);
4112 iounmap(adapter
->io_addr
);
4113 pci_release_regions(pdev
);
4115 hw_dbg(&adapter
->hw
, "Remove complete\n");
4117 disable_dev
= !test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4118 free_netdev(netdev
);
4121 pci_disable_device(pdev
);
4125 * ixgbevf_io_error_detected - called when PCI error is detected
4126 * @pdev: Pointer to PCI device
4127 * @state: The current pci connection state
4129 * This function is called after a PCI bus error affecting
4130 * this device has been detected.
4132 static pci_ers_result_t
ixgbevf_io_error_detected(struct pci_dev
*pdev
,
4133 pci_channel_state_t state
)
4135 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4136 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4138 if (!test_bit(__IXGBEVF_SERVICE_INITED
, &adapter
->state
))
4139 return PCI_ERS_RESULT_DISCONNECT
;
4142 netif_device_detach(netdev
);
4144 if (state
== pci_channel_io_perm_failure
) {
4146 return PCI_ERS_RESULT_DISCONNECT
;
4149 if (netif_running(netdev
))
4150 ixgbevf_down(adapter
);
4152 if (!test_and_set_bit(__IXGBEVF_DISABLED
, &adapter
->state
))
4153 pci_disable_device(pdev
);
4156 /* Request a slot slot reset. */
4157 return PCI_ERS_RESULT_NEED_RESET
;
4161 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4162 * @pdev: Pointer to PCI device
4164 * Restart the card from scratch, as if from a cold-boot. Implementation
4165 * resembles the first-half of the ixgbevf_resume routine.
4167 static pci_ers_result_t
ixgbevf_io_slot_reset(struct pci_dev
*pdev
)
4169 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4170 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4172 if (pci_enable_device_mem(pdev
)) {
4174 "Cannot re-enable PCI device after reset.\n");
4175 return PCI_ERS_RESULT_DISCONNECT
;
4178 smp_mb__before_atomic();
4179 clear_bit(__IXGBEVF_DISABLED
, &adapter
->state
);
4180 pci_set_master(pdev
);
4182 ixgbevf_reset(adapter
);
4184 return PCI_ERS_RESULT_RECOVERED
;
4188 * ixgbevf_io_resume - called when traffic can start flowing again.
4189 * @pdev: Pointer to PCI device
4191 * This callback is called when the error recovery driver tells us that
4192 * its OK to resume normal operation. Implementation resembles the
4193 * second-half of the ixgbevf_resume routine.
4195 static void ixgbevf_io_resume(struct pci_dev
*pdev
)
4197 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4198 struct ixgbevf_adapter
*adapter
= netdev_priv(netdev
);
4200 if (netif_running(netdev
))
4201 ixgbevf_up(adapter
);
4203 netif_device_attach(netdev
);
4206 /* PCI Error Recovery (ERS) */
4207 static const struct pci_error_handlers ixgbevf_err_handler
= {
4208 .error_detected
= ixgbevf_io_error_detected
,
4209 .slot_reset
= ixgbevf_io_slot_reset
,
4210 .resume
= ixgbevf_io_resume
,
4213 static struct pci_driver ixgbevf_driver
= {
4214 .name
= ixgbevf_driver_name
,
4215 .id_table
= ixgbevf_pci_tbl
,
4216 .probe
= ixgbevf_probe
,
4217 .remove
= ixgbevf_remove
,
4219 /* Power Management Hooks */
4220 .suspend
= ixgbevf_suspend
,
4221 .resume
= ixgbevf_resume
,
4223 .shutdown
= ixgbevf_shutdown
,
4224 .err_handler
= &ixgbevf_err_handler
4228 * ixgbevf_init_module - Driver Registration Routine
4230 * ixgbevf_init_module is the first routine called when the driver is
4231 * loaded. All it does is register with the PCI subsystem.
4233 static int __init
ixgbevf_init_module(void)
4235 pr_info("%s - version %s\n", ixgbevf_driver_string
,
4236 ixgbevf_driver_version
);
4238 pr_info("%s\n", ixgbevf_copyright
);
4239 ixgbevf_wq
= create_singlethread_workqueue(ixgbevf_driver_name
);
4241 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name
);
4245 return pci_register_driver(&ixgbevf_driver
);
4248 module_init(ixgbevf_init_module
);
4251 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4253 * ixgbevf_exit_module is called just before the driver is removed
4256 static void __exit
ixgbevf_exit_module(void)
4258 pci_unregister_driver(&ixgbevf_driver
);
4260 destroy_workqueue(ixgbevf_wq
);
4267 * ixgbevf_get_hw_dev_name - return device name string
4268 * used by hardware layer to print debugging information
4270 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw
*hw
)
4272 struct ixgbevf_adapter
*adapter
= hw
->back
;
4274 return adapter
->netdev
->name
;
4278 module_exit(ixgbevf_exit_module
);
4280 /* ixgbevf_main.c */