2 * Copyright 2015 Amazon.com, Inc. or its affiliates.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35 #ifdef CONFIG_RFS_ACCEL
36 #include <linux/cpu_rmap.h>
37 #endif /* CONFIG_RFS_ACCEL */
38 #include <linux/ethtool.h>
39 #include <linux/if_vlan.h>
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/moduleparam.h>
43 #include <linux/numa.h>
44 #include <linux/pci.h>
45 #include <linux/utsname.h>
46 #include <linux/version.h>
47 #include <linux/vmalloc.h>
50 #include "ena_netdev.h"
51 #include "ena_pci_id_tbl.h"
53 static char version
[] = DEVICE_NAME
" v" DRV_MODULE_VERSION
"\n";
55 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
56 MODULE_DESCRIPTION(DEVICE_NAME
);
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(DRV_MODULE_VERSION
);
60 /* Time in jiffies before concluding the transmitter is hung. */
61 #define TX_TIMEOUT (5 * HZ)
63 #define ENA_NAPI_BUDGET 64
65 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | \
66 NETIF_MSG_TX_DONE | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR)
67 static int debug
= -1;
68 module_param(debug
, int, 0);
69 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
71 static struct ena_aenq_handlers aenq_handlers
;
73 static struct workqueue_struct
*ena_wq
;
75 MODULE_DEVICE_TABLE(pci
, ena_pci_tbl
);
77 static int ena_rss_init_default(struct ena_adapter
*adapter
);
78 static void check_for_admin_com_state(struct ena_adapter
*adapter
);
79 static void ena_destroy_device(struct ena_adapter
*adapter
, bool graceful
);
80 static int ena_restore_device(struct ena_adapter
*adapter
);
82 static void ena_tx_timeout(struct net_device
*dev
)
84 struct ena_adapter
*adapter
= netdev_priv(dev
);
86 /* Change the state of the device to trigger reset
87 * Check that we are not in the middle or a trigger already
90 if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
93 adapter
->reset_reason
= ENA_REGS_RESET_OS_NETDEV_WD
;
94 u64_stats_update_begin(&adapter
->syncp
);
95 adapter
->dev_stats
.tx_timeout
++;
96 u64_stats_update_end(&adapter
->syncp
);
98 netif_err(adapter
, tx_err
, dev
, "Transmit time out\n");
101 static void update_rx_ring_mtu(struct ena_adapter
*adapter
, int mtu
)
105 for (i
= 0; i
< adapter
->num_queues
; i
++)
106 adapter
->rx_ring
[i
].mtu
= mtu
;
109 static int ena_change_mtu(struct net_device
*dev
, int new_mtu
)
111 struct ena_adapter
*adapter
= netdev_priv(dev
);
114 ret
= ena_com_set_dev_mtu(adapter
->ena_dev
, new_mtu
);
116 netif_dbg(adapter
, drv
, dev
, "set MTU to %d\n", new_mtu
);
117 update_rx_ring_mtu(adapter
, new_mtu
);
120 netif_err(adapter
, drv
, dev
, "Failed to set MTU to %d\n",
127 static int ena_init_rx_cpu_rmap(struct ena_adapter
*adapter
)
129 #ifdef CONFIG_RFS_ACCEL
133 adapter
->netdev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(adapter
->num_queues
);
134 if (!adapter
->netdev
->rx_cpu_rmap
)
136 for (i
= 0; i
< adapter
->num_queues
; i
++) {
137 int irq_idx
= ENA_IO_IRQ_IDX(i
);
139 rc
= irq_cpu_rmap_add(adapter
->netdev
->rx_cpu_rmap
,
140 pci_irq_vector(adapter
->pdev
, irq_idx
));
142 free_irq_cpu_rmap(adapter
->netdev
->rx_cpu_rmap
);
143 adapter
->netdev
->rx_cpu_rmap
= NULL
;
147 #endif /* CONFIG_RFS_ACCEL */
151 static void ena_init_io_rings_common(struct ena_adapter
*adapter
,
152 struct ena_ring
*ring
, u16 qid
)
155 ring
->pdev
= adapter
->pdev
;
156 ring
->dev
= &adapter
->pdev
->dev
;
157 ring
->netdev
= adapter
->netdev
;
158 ring
->napi
= &adapter
->ena_napi
[qid
].napi
;
159 ring
->adapter
= adapter
;
160 ring
->ena_dev
= adapter
->ena_dev
;
161 ring
->per_napi_packets
= 0;
162 ring
->per_napi_bytes
= 0;
164 ring
->first_interrupt
= false;
165 ring
->no_interrupt_event_cnt
= 0;
166 u64_stats_init(&ring
->syncp
);
169 static void ena_init_io_rings(struct ena_adapter
*adapter
)
171 struct ena_com_dev
*ena_dev
;
172 struct ena_ring
*txr
, *rxr
;
175 ena_dev
= adapter
->ena_dev
;
177 for (i
= 0; i
< adapter
->num_queues
; i
++) {
178 txr
= &adapter
->tx_ring
[i
];
179 rxr
= &adapter
->rx_ring
[i
];
181 /* TX/RX common ring state */
182 ena_init_io_rings_common(adapter
, txr
, i
);
183 ena_init_io_rings_common(adapter
, rxr
, i
);
185 /* TX specific ring state */
186 txr
->ring_size
= adapter
->tx_ring_size
;
187 txr
->tx_max_header_size
= ena_dev
->tx_max_header_size
;
188 txr
->tx_mem_queue_type
= ena_dev
->tx_mem_queue_type
;
189 txr
->sgl_size
= adapter
->max_tx_sgl_size
;
190 txr
->smoothed_interval
=
191 ena_com_get_nonadaptive_moderation_interval_tx(ena_dev
);
193 /* RX specific ring state */
194 rxr
->ring_size
= adapter
->rx_ring_size
;
195 rxr
->rx_copybreak
= adapter
->rx_copybreak
;
196 rxr
->sgl_size
= adapter
->max_rx_sgl_size
;
197 rxr
->smoothed_interval
=
198 ena_com_get_nonadaptive_moderation_interval_rx(ena_dev
);
199 rxr
->empty_rx_queue
= 0;
203 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
204 * @adapter: network interface device structure
207 * Return 0 on success, negative on failure
209 static int ena_setup_tx_resources(struct ena_adapter
*adapter
, int qid
)
211 struct ena_ring
*tx_ring
= &adapter
->tx_ring
[qid
];
212 struct ena_irq
*ena_irq
= &adapter
->irq_tbl
[ENA_IO_IRQ_IDX(qid
)];
215 if (tx_ring
->tx_buffer_info
) {
216 netif_err(adapter
, ifup
,
217 adapter
->netdev
, "tx_buffer_info info is not NULL");
221 size
= sizeof(struct ena_tx_buffer
) * tx_ring
->ring_size
;
222 node
= cpu_to_node(ena_irq
->cpu
);
224 tx_ring
->tx_buffer_info
= vzalloc_node(size
, node
);
225 if (!tx_ring
->tx_buffer_info
) {
226 tx_ring
->tx_buffer_info
= vzalloc(size
);
227 if (!tx_ring
->tx_buffer_info
)
231 size
= sizeof(u16
) * tx_ring
->ring_size
;
232 tx_ring
->free_tx_ids
= vzalloc_node(size
, node
);
233 if (!tx_ring
->free_tx_ids
) {
234 tx_ring
->free_tx_ids
= vzalloc(size
);
235 if (!tx_ring
->free_tx_ids
) {
236 vfree(tx_ring
->tx_buffer_info
);
241 /* Req id ring for TX out of order completions */
242 for (i
= 0; i
< tx_ring
->ring_size
; i
++)
243 tx_ring
->free_tx_ids
[i
] = i
;
245 /* Reset tx statistics */
246 memset(&tx_ring
->tx_stats
, 0x0, sizeof(tx_ring
->tx_stats
));
248 tx_ring
->next_to_use
= 0;
249 tx_ring
->next_to_clean
= 0;
250 tx_ring
->cpu
= ena_irq
->cpu
;
254 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
255 * @adapter: network interface device structure
258 * Free all transmit software resources
260 static void ena_free_tx_resources(struct ena_adapter
*adapter
, int qid
)
262 struct ena_ring
*tx_ring
= &adapter
->tx_ring
[qid
];
264 vfree(tx_ring
->tx_buffer_info
);
265 tx_ring
->tx_buffer_info
= NULL
;
267 vfree(tx_ring
->free_tx_ids
);
268 tx_ring
->free_tx_ids
= NULL
;
271 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
272 * @adapter: private structure
274 * Return 0 on success, negative on failure
276 static int ena_setup_all_tx_resources(struct ena_adapter
*adapter
)
280 for (i
= 0; i
< adapter
->num_queues
; i
++) {
281 rc
= ena_setup_tx_resources(adapter
, i
);
290 netif_err(adapter
, ifup
, adapter
->netdev
,
291 "Tx queue %d: allocation failed\n", i
);
293 /* rewind the index freeing the rings as we go */
295 ena_free_tx_resources(adapter
, i
);
299 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
300 * @adapter: board private structure
302 * Free all transmit software resources
304 static void ena_free_all_io_tx_resources(struct ena_adapter
*adapter
)
308 for (i
= 0; i
< adapter
->num_queues
; i
++)
309 ena_free_tx_resources(adapter
, i
);
312 static inline int validate_rx_req_id(struct ena_ring
*rx_ring
, u16 req_id
)
314 if (likely(req_id
< rx_ring
->ring_size
))
317 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
318 "Invalid rx req_id: %hu\n", req_id
);
320 u64_stats_update_begin(&rx_ring
->syncp
);
321 rx_ring
->rx_stats
.bad_req_id
++;
322 u64_stats_update_end(&rx_ring
->syncp
);
324 /* Trigger device reset */
325 rx_ring
->adapter
->reset_reason
= ENA_REGS_RESET_INV_RX_REQ_ID
;
326 set_bit(ENA_FLAG_TRIGGER_RESET
, &rx_ring
->adapter
->flags
);
330 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
331 * @adapter: network interface device structure
334 * Returns 0 on success, negative on failure
336 static int ena_setup_rx_resources(struct ena_adapter
*adapter
,
339 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
340 struct ena_irq
*ena_irq
= &adapter
->irq_tbl
[ENA_IO_IRQ_IDX(qid
)];
343 if (rx_ring
->rx_buffer_info
) {
344 netif_err(adapter
, ifup
, adapter
->netdev
,
345 "rx_buffer_info is not NULL");
349 /* alloc extra element so in rx path
350 * we can always prefetch rx_info + 1
352 size
= sizeof(struct ena_rx_buffer
) * (rx_ring
->ring_size
+ 1);
353 node
= cpu_to_node(ena_irq
->cpu
);
355 rx_ring
->rx_buffer_info
= vzalloc_node(size
, node
);
356 if (!rx_ring
->rx_buffer_info
) {
357 rx_ring
->rx_buffer_info
= vzalloc(size
);
358 if (!rx_ring
->rx_buffer_info
)
362 size
= sizeof(u16
) * rx_ring
->ring_size
;
363 rx_ring
->free_rx_ids
= vzalloc_node(size
, node
);
364 if (!rx_ring
->free_rx_ids
) {
365 rx_ring
->free_rx_ids
= vzalloc(size
);
366 if (!rx_ring
->free_rx_ids
) {
367 vfree(rx_ring
->rx_buffer_info
);
372 /* Req id ring for receiving RX pkts out of order */
373 for (i
= 0; i
< rx_ring
->ring_size
; i
++)
374 rx_ring
->free_rx_ids
[i
] = i
;
376 /* Reset rx statistics */
377 memset(&rx_ring
->rx_stats
, 0x0, sizeof(rx_ring
->rx_stats
));
379 rx_ring
->next_to_clean
= 0;
380 rx_ring
->next_to_use
= 0;
381 rx_ring
->cpu
= ena_irq
->cpu
;
386 /* ena_free_rx_resources - Free I/O Rx Resources
387 * @adapter: network interface device structure
390 * Free all receive software resources
392 static void ena_free_rx_resources(struct ena_adapter
*adapter
,
395 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
397 vfree(rx_ring
->rx_buffer_info
);
398 rx_ring
->rx_buffer_info
= NULL
;
400 vfree(rx_ring
->free_rx_ids
);
401 rx_ring
->free_rx_ids
= NULL
;
404 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
405 * @adapter: board private structure
407 * Return 0 on success, negative on failure
409 static int ena_setup_all_rx_resources(struct ena_adapter
*adapter
)
413 for (i
= 0; i
< adapter
->num_queues
; i
++) {
414 rc
= ena_setup_rx_resources(adapter
, i
);
423 netif_err(adapter
, ifup
, adapter
->netdev
,
424 "Rx queue %d: allocation failed\n", i
);
426 /* rewind the index freeing the rings as we go */
428 ena_free_rx_resources(adapter
, i
);
432 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
433 * @adapter: board private structure
435 * Free all receive software resources
437 static void ena_free_all_io_rx_resources(struct ena_adapter
*adapter
)
441 for (i
= 0; i
< adapter
->num_queues
; i
++)
442 ena_free_rx_resources(adapter
, i
);
445 static inline int ena_alloc_rx_page(struct ena_ring
*rx_ring
,
446 struct ena_rx_buffer
*rx_info
, gfp_t gfp
)
448 struct ena_com_buf
*ena_buf
;
452 /* if previous allocated page is not used */
453 if (unlikely(rx_info
->page
))
456 page
= alloc_page(gfp
);
457 if (unlikely(!page
)) {
458 u64_stats_update_begin(&rx_ring
->syncp
);
459 rx_ring
->rx_stats
.page_alloc_fail
++;
460 u64_stats_update_end(&rx_ring
->syncp
);
464 dma
= dma_map_page(rx_ring
->dev
, page
, 0, ENA_PAGE_SIZE
,
466 if (unlikely(dma_mapping_error(rx_ring
->dev
, dma
))) {
467 u64_stats_update_begin(&rx_ring
->syncp
);
468 rx_ring
->rx_stats
.dma_mapping_err
++;
469 u64_stats_update_end(&rx_ring
->syncp
);
474 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
475 "alloc page %p, rx_info %p\n", page
, rx_info
);
477 rx_info
->page
= page
;
478 rx_info
->page_offset
= 0;
479 ena_buf
= &rx_info
->ena_buf
;
480 ena_buf
->paddr
= dma
;
481 ena_buf
->len
= ENA_PAGE_SIZE
;
486 static void ena_free_rx_page(struct ena_ring
*rx_ring
,
487 struct ena_rx_buffer
*rx_info
)
489 struct page
*page
= rx_info
->page
;
490 struct ena_com_buf
*ena_buf
= &rx_info
->ena_buf
;
492 if (unlikely(!page
)) {
493 netif_warn(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
494 "Trying to free unallocated buffer\n");
498 dma_unmap_page(rx_ring
->dev
, ena_buf
->paddr
, ENA_PAGE_SIZE
,
502 rx_info
->page
= NULL
;
505 static int ena_refill_rx_bufs(struct ena_ring
*rx_ring
, u32 num
)
507 u16 next_to_use
, req_id
;
511 next_to_use
= rx_ring
->next_to_use
;
513 for (i
= 0; i
< num
; i
++) {
514 struct ena_rx_buffer
*rx_info
;
516 req_id
= rx_ring
->free_rx_ids
[next_to_use
];
517 rc
= validate_rx_req_id(rx_ring
, req_id
);
518 if (unlikely(rc
< 0))
521 rx_info
= &rx_ring
->rx_buffer_info
[req_id
];
524 rc
= ena_alloc_rx_page(rx_ring
, rx_info
,
525 GFP_ATOMIC
| __GFP_COMP
);
526 if (unlikely(rc
< 0)) {
527 netif_warn(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
528 "failed to alloc buffer for rx queue %d\n",
532 rc
= ena_com_add_single_rx_desc(rx_ring
->ena_com_io_sq
,
536 netif_warn(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
537 "failed to add buffer for rx queue %d\n",
541 next_to_use
= ENA_RX_RING_IDX_NEXT(next_to_use
,
545 if (unlikely(i
< num
)) {
546 u64_stats_update_begin(&rx_ring
->syncp
);
547 rx_ring
->rx_stats
.refil_partial
++;
548 u64_stats_update_end(&rx_ring
->syncp
);
549 netdev_warn(rx_ring
->netdev
,
550 "refilled rx qid %d with only %d buffers (from %d)\n",
551 rx_ring
->qid
, i
, num
);
554 /* ena_com_write_sq_doorbell issues a wmb() */
556 ena_com_write_sq_doorbell(rx_ring
->ena_com_io_sq
);
558 rx_ring
->next_to_use
= next_to_use
;
563 static void ena_free_rx_bufs(struct ena_adapter
*adapter
,
566 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
569 for (i
= 0; i
< rx_ring
->ring_size
; i
++) {
570 struct ena_rx_buffer
*rx_info
= &rx_ring
->rx_buffer_info
[i
];
573 ena_free_rx_page(rx_ring
, rx_info
);
577 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
578 * @adapter: board private structure
581 static void ena_refill_all_rx_bufs(struct ena_adapter
*adapter
)
583 struct ena_ring
*rx_ring
;
586 for (i
= 0; i
< adapter
->num_queues
; i
++) {
587 rx_ring
= &adapter
->rx_ring
[i
];
588 bufs_num
= rx_ring
->ring_size
- 1;
589 rc
= ena_refill_rx_bufs(rx_ring
, bufs_num
);
591 if (unlikely(rc
!= bufs_num
))
592 netif_warn(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
593 "refilling Queue %d failed. allocated %d buffers from: %d\n",
598 static void ena_free_all_rx_bufs(struct ena_adapter
*adapter
)
602 for (i
= 0; i
< adapter
->num_queues
; i
++)
603 ena_free_rx_bufs(adapter
, i
);
606 /* ena_free_tx_bufs - Free Tx Buffers per Queue
607 * @tx_ring: TX ring for which buffers be freed
609 static void ena_free_tx_bufs(struct ena_ring
*tx_ring
)
611 bool print_once
= true;
614 for (i
= 0; i
< tx_ring
->ring_size
; i
++) {
615 struct ena_tx_buffer
*tx_info
= &tx_ring
->tx_buffer_info
[i
];
616 struct ena_com_buf
*ena_buf
;
624 netdev_notice(tx_ring
->netdev
,
625 "free uncompleted tx skb qid %d idx 0x%x\n",
629 netdev_dbg(tx_ring
->netdev
,
630 "free uncompleted tx skb qid %d idx 0x%x\n",
634 ena_buf
= tx_info
->bufs
;
635 dma_unmap_single(tx_ring
->dev
,
640 /* unmap remaining mapped pages */
641 nr_frags
= tx_info
->num_of_bufs
- 1;
642 for (j
= 0; j
< nr_frags
; j
++) {
644 dma_unmap_page(tx_ring
->dev
,
650 dev_kfree_skb_any(tx_info
->skb
);
652 netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring
->netdev
,
656 static void ena_free_all_tx_bufs(struct ena_adapter
*adapter
)
658 struct ena_ring
*tx_ring
;
661 for (i
= 0; i
< adapter
->num_queues
; i
++) {
662 tx_ring
= &adapter
->tx_ring
[i
];
663 ena_free_tx_bufs(tx_ring
);
667 static void ena_destroy_all_tx_queues(struct ena_adapter
*adapter
)
672 for (i
= 0; i
< adapter
->num_queues
; i
++) {
673 ena_qid
= ENA_IO_TXQ_IDX(i
);
674 ena_com_destroy_io_queue(adapter
->ena_dev
, ena_qid
);
678 static void ena_destroy_all_rx_queues(struct ena_adapter
*adapter
)
683 for (i
= 0; i
< adapter
->num_queues
; i
++) {
684 ena_qid
= ENA_IO_RXQ_IDX(i
);
685 ena_com_destroy_io_queue(adapter
->ena_dev
, ena_qid
);
689 static void ena_destroy_all_io_queues(struct ena_adapter
*adapter
)
691 ena_destroy_all_tx_queues(adapter
);
692 ena_destroy_all_rx_queues(adapter
);
695 static int validate_tx_req_id(struct ena_ring
*tx_ring
, u16 req_id
)
697 struct ena_tx_buffer
*tx_info
= NULL
;
699 if (likely(req_id
< tx_ring
->ring_size
)) {
700 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
701 if (likely(tx_info
->skb
))
706 netif_err(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
707 "tx_info doesn't have valid skb\n");
709 netif_err(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
710 "Invalid req_id: %hu\n", req_id
);
712 u64_stats_update_begin(&tx_ring
->syncp
);
713 tx_ring
->tx_stats
.bad_req_id
++;
714 u64_stats_update_end(&tx_ring
->syncp
);
716 /* Trigger device reset */
717 tx_ring
->adapter
->reset_reason
= ENA_REGS_RESET_INV_TX_REQ_ID
;
718 set_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
);
722 static int ena_clean_tx_irq(struct ena_ring
*tx_ring
, u32 budget
)
724 struct netdev_queue
*txq
;
733 next_to_clean
= tx_ring
->next_to_clean
;
734 txq
= netdev_get_tx_queue(tx_ring
->netdev
, tx_ring
->qid
);
736 while (tx_pkts
< budget
) {
737 struct ena_tx_buffer
*tx_info
;
739 struct ena_com_buf
*ena_buf
;
742 rc
= ena_com_tx_comp_req_id_get(tx_ring
->ena_com_io_cq
,
747 rc
= validate_tx_req_id(tx_ring
, req_id
);
751 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
754 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
758 tx_info
->last_jiffies
= 0;
760 if (likely(tx_info
->num_of_bufs
!= 0)) {
761 ena_buf
= tx_info
->bufs
;
763 dma_unmap_single(tx_ring
->dev
,
764 dma_unmap_addr(ena_buf
, paddr
),
765 dma_unmap_len(ena_buf
, len
),
768 /* unmap remaining mapped pages */
769 nr_frags
= tx_info
->num_of_bufs
- 1;
770 for (i
= 0; i
< nr_frags
; i
++) {
772 dma_unmap_page(tx_ring
->dev
,
773 dma_unmap_addr(ena_buf
, paddr
),
774 dma_unmap_len(ena_buf
, len
),
779 netif_dbg(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
780 "tx_poll: q %d skb %p completed\n", tx_ring
->qid
,
783 tx_bytes
+= skb
->len
;
786 total_done
+= tx_info
->tx_descs
;
788 tx_ring
->free_tx_ids
[next_to_clean
] = req_id
;
789 next_to_clean
= ENA_TX_RING_IDX_NEXT(next_to_clean
,
793 tx_ring
->next_to_clean
= next_to_clean
;
794 ena_com_comp_ack(tx_ring
->ena_com_io_sq
, total_done
);
795 ena_com_update_dev_comp_head(tx_ring
->ena_com_io_cq
);
797 netdev_tx_completed_queue(txq
, tx_pkts
, tx_bytes
);
799 netif_dbg(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
800 "tx_poll: q %d done. total pkts: %d\n",
801 tx_ring
->qid
, tx_pkts
);
803 /* need to make the rings circular update visible to
804 * ena_start_xmit() before checking for netif_queue_stopped().
808 above_thresh
= ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) >
809 ENA_TX_WAKEUP_THRESH
;
810 if (unlikely(netif_tx_queue_stopped(txq
) && above_thresh
)) {
811 __netif_tx_lock(txq
, smp_processor_id());
812 above_thresh
= ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) >
813 ENA_TX_WAKEUP_THRESH
;
814 if (netif_tx_queue_stopped(txq
) && above_thresh
) {
815 netif_tx_wake_queue(txq
);
816 u64_stats_update_begin(&tx_ring
->syncp
);
817 tx_ring
->tx_stats
.queue_wakeup
++;
818 u64_stats_update_end(&tx_ring
->syncp
);
820 __netif_tx_unlock(txq
);
823 tx_ring
->per_napi_bytes
+= tx_bytes
;
824 tx_ring
->per_napi_packets
+= tx_pkts
;
829 static struct sk_buff
*ena_alloc_skb(struct ena_ring
*rx_ring
, bool frags
)
834 skb
= napi_get_frags(rx_ring
->napi
);
836 skb
= netdev_alloc_skb_ip_align(rx_ring
->netdev
,
837 rx_ring
->rx_copybreak
);
839 if (unlikely(!skb
)) {
840 u64_stats_update_begin(&rx_ring
->syncp
);
841 rx_ring
->rx_stats
.skb_alloc_fail
++;
842 u64_stats_update_end(&rx_ring
->syncp
);
843 netif_dbg(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
844 "Failed to allocate skb. frags: %d\n", frags
);
851 static struct sk_buff
*ena_rx_skb(struct ena_ring
*rx_ring
,
852 struct ena_com_rx_buf_info
*ena_bufs
,
857 struct ena_rx_buffer
*rx_info
;
858 u16 len
, req_id
, buf
= 0;
861 len
= ena_bufs
[buf
].len
;
862 req_id
= ena_bufs
[buf
].req_id
;
863 rx_info
= &rx_ring
->rx_buffer_info
[req_id
];
865 if (unlikely(!rx_info
->page
)) {
866 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
871 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
872 "rx_info %p page %p\n",
873 rx_info
, rx_info
->page
);
875 /* save virt address of first buffer */
876 va
= page_address(rx_info
->page
) + rx_info
->page_offset
;
877 prefetch(va
+ NET_IP_ALIGN
);
879 if (len
<= rx_ring
->rx_copybreak
) {
880 skb
= ena_alloc_skb(rx_ring
, false);
884 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
885 "rx allocated small packet. len %d. data_len %d\n",
886 skb
->len
, skb
->data_len
);
888 /* sync this buffer for CPU use */
889 dma_sync_single_for_cpu(rx_ring
->dev
,
890 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
893 skb_copy_to_linear_data(skb
, va
, len
);
894 dma_sync_single_for_device(rx_ring
->dev
,
895 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
900 skb
->protocol
= eth_type_trans(skb
, rx_ring
->netdev
);
901 rx_ring
->free_rx_ids
[*next_to_clean
] = req_id
;
902 *next_to_clean
= ENA_RX_RING_IDX_ADD(*next_to_clean
, descs
,
907 skb
= ena_alloc_skb(rx_ring
, true);
912 dma_unmap_page(rx_ring
->dev
,
913 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
914 ENA_PAGE_SIZE
, DMA_FROM_DEVICE
);
916 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, rx_info
->page
,
917 rx_info
->page_offset
, len
, ENA_PAGE_SIZE
);
919 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
920 "rx skb updated. len %d. data_len %d\n",
921 skb
->len
, skb
->data_len
);
923 rx_info
->page
= NULL
;
925 rx_ring
->free_rx_ids
[*next_to_clean
] = req_id
;
927 ENA_RX_RING_IDX_NEXT(*next_to_clean
,
929 if (likely(--descs
== 0))
933 len
= ena_bufs
[buf
].len
;
934 req_id
= ena_bufs
[buf
].req_id
;
935 rx_info
= &rx_ring
->rx_buffer_info
[req_id
];
941 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
942 * @adapter: structure containing adapter specific data
943 * @ena_rx_ctx: received packet context/metadata
944 * @skb: skb currently being received and modified
946 static inline void ena_rx_checksum(struct ena_ring
*rx_ring
,
947 struct ena_com_rx_ctx
*ena_rx_ctx
,
950 /* Rx csum disabled */
951 if (unlikely(!(rx_ring
->netdev
->features
& NETIF_F_RXCSUM
))) {
952 skb
->ip_summed
= CHECKSUM_NONE
;
956 /* For fragmented packets the checksum isn't valid */
957 if (ena_rx_ctx
->frag
) {
958 skb
->ip_summed
= CHECKSUM_NONE
;
962 /* if IP and error */
963 if (unlikely((ena_rx_ctx
->l3_proto
== ENA_ETH_IO_L3_PROTO_IPV4
) &&
964 (ena_rx_ctx
->l3_csum_err
))) {
965 /* ipv4 checksum error */
966 skb
->ip_summed
= CHECKSUM_NONE
;
967 u64_stats_update_begin(&rx_ring
->syncp
);
968 rx_ring
->rx_stats
.bad_csum
++;
969 u64_stats_update_end(&rx_ring
->syncp
);
970 netif_dbg(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
971 "RX IPv4 header checksum error\n");
976 if (likely((ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_TCP
) ||
977 (ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_UDP
))) {
978 if (unlikely(ena_rx_ctx
->l4_csum_err
)) {
979 /* TCP/UDP checksum error */
980 u64_stats_update_begin(&rx_ring
->syncp
);
981 rx_ring
->rx_stats
.bad_csum
++;
982 u64_stats_update_end(&rx_ring
->syncp
);
983 netif_dbg(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
984 "RX L4 checksum error\n");
985 skb
->ip_summed
= CHECKSUM_NONE
;
989 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
993 static void ena_set_rx_hash(struct ena_ring
*rx_ring
,
994 struct ena_com_rx_ctx
*ena_rx_ctx
,
997 enum pkt_hash_types hash_type
;
999 if (likely(rx_ring
->netdev
->features
& NETIF_F_RXHASH
)) {
1000 if (likely((ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_TCP
) ||
1001 (ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_UDP
)))
1003 hash_type
= PKT_HASH_TYPE_L4
;
1005 hash_type
= PKT_HASH_TYPE_NONE
;
1007 /* Override hash type if the packet is fragmented */
1008 if (ena_rx_ctx
->frag
)
1009 hash_type
= PKT_HASH_TYPE_NONE
;
1011 skb_set_hash(skb
, ena_rx_ctx
->hash
, hash_type
);
1015 /* ena_clean_rx_irq - Cleanup RX irq
1016 * @rx_ring: RX ring to clean
1017 * @napi: napi handler
1018 * @budget: how many packets driver is allowed to clean
1020 * Returns the number of cleaned buffers.
1022 static int ena_clean_rx_irq(struct ena_ring
*rx_ring
, struct napi_struct
*napi
,
1025 u16 next_to_clean
= rx_ring
->next_to_clean
;
1026 u32 res_budget
, work_done
;
1028 struct ena_com_rx_ctx ena_rx_ctx
;
1029 struct ena_adapter
*adapter
;
1030 struct sk_buff
*skb
;
1031 int refill_required
;
1032 int refill_threshold
;
1035 int rx_copybreak_pkt
= 0;
1038 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
1039 "%s qid %d\n", __func__
, rx_ring
->qid
);
1040 res_budget
= budget
;
1043 ena_rx_ctx
.ena_bufs
= rx_ring
->ena_bufs
;
1044 ena_rx_ctx
.max_bufs
= rx_ring
->sgl_size
;
1045 ena_rx_ctx
.descs
= 0;
1046 rc
= ena_com_rx_pkt(rx_ring
->ena_com_io_cq
,
1047 rx_ring
->ena_com_io_sq
,
1052 if (unlikely(ena_rx_ctx
.descs
== 0))
1055 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
1056 "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
1057 rx_ring
->qid
, ena_rx_ctx
.descs
, ena_rx_ctx
.l3_proto
,
1058 ena_rx_ctx
.l4_proto
, ena_rx_ctx
.hash
);
1060 /* allocate skb and fill it */
1061 skb
= ena_rx_skb(rx_ring
, rx_ring
->ena_bufs
, ena_rx_ctx
.descs
,
1064 /* exit if we failed to retrieve a buffer */
1065 if (unlikely(!skb
)) {
1066 for (i
= 0; i
< ena_rx_ctx
.descs
; i
++) {
1067 rx_ring
->free_tx_ids
[next_to_clean
] =
1068 rx_ring
->ena_bufs
[i
].req_id
;
1070 ENA_RX_RING_IDX_NEXT(next_to_clean
,
1071 rx_ring
->ring_size
);
1076 ena_rx_checksum(rx_ring
, &ena_rx_ctx
, skb
);
1078 ena_set_rx_hash(rx_ring
, &ena_rx_ctx
, skb
);
1080 skb_record_rx_queue(skb
, rx_ring
->qid
);
1082 if (rx_ring
->ena_bufs
[0].len
<= rx_ring
->rx_copybreak
) {
1083 total_len
+= rx_ring
->ena_bufs
[0].len
;
1085 napi_gro_receive(napi
, skb
);
1087 total_len
+= skb
->len
;
1088 napi_gro_frags(napi
);
1092 } while (likely(res_budget
));
1094 work_done
= budget
- res_budget
;
1095 rx_ring
->per_napi_bytes
+= total_len
;
1096 rx_ring
->per_napi_packets
+= work_done
;
1097 u64_stats_update_begin(&rx_ring
->syncp
);
1098 rx_ring
->rx_stats
.bytes
+= total_len
;
1099 rx_ring
->rx_stats
.cnt
+= work_done
;
1100 rx_ring
->rx_stats
.rx_copybreak_pkt
+= rx_copybreak_pkt
;
1101 u64_stats_update_end(&rx_ring
->syncp
);
1103 rx_ring
->next_to_clean
= next_to_clean
;
1105 refill_required
= ena_com_sq_empty_space(rx_ring
->ena_com_io_sq
);
1106 refill_threshold
= rx_ring
->ring_size
/ ENA_RX_REFILL_THRESH_DIVIDER
;
1108 /* Optimization, try to batch new rx buffers */
1109 if (refill_required
> refill_threshold
) {
1110 ena_com_update_dev_comp_head(rx_ring
->ena_com_io_cq
);
1111 ena_refill_rx_bufs(rx_ring
, refill_required
);
1117 adapter
= netdev_priv(rx_ring
->netdev
);
1119 u64_stats_update_begin(&rx_ring
->syncp
);
1120 rx_ring
->rx_stats
.bad_desc_num
++;
1121 u64_stats_update_end(&rx_ring
->syncp
);
1123 /* Too many desc from the device. Trigger reset */
1124 adapter
->reset_reason
= ENA_REGS_RESET_TOO_MANY_RX_DESCS
;
1125 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
1130 inline void ena_adjust_intr_moderation(struct ena_ring
*rx_ring
,
1131 struct ena_ring
*tx_ring
)
1133 /* We apply adaptive moderation on Rx path only.
1134 * Tx uses static interrupt moderation.
1136 ena_com_calculate_interrupt_delay(rx_ring
->ena_dev
,
1137 rx_ring
->per_napi_packets
,
1138 rx_ring
->per_napi_bytes
,
1139 &rx_ring
->smoothed_interval
,
1140 &rx_ring
->moder_tbl_idx
);
1142 /* Reset per napi packets/bytes */
1143 tx_ring
->per_napi_packets
= 0;
1144 tx_ring
->per_napi_bytes
= 0;
1145 rx_ring
->per_napi_packets
= 0;
1146 rx_ring
->per_napi_bytes
= 0;
1149 static inline void ena_unmask_interrupt(struct ena_ring
*tx_ring
,
1150 struct ena_ring
*rx_ring
)
1152 struct ena_eth_io_intr_reg intr_reg
;
1154 /* Update intr register: rx intr delay,
1155 * tx intr delay and interrupt unmask
1157 ena_com_update_intr_reg(&intr_reg
,
1158 rx_ring
->smoothed_interval
,
1159 tx_ring
->smoothed_interval
,
1162 /* It is a shared MSI-X.
1163 * Tx and Rx CQ have pointer to it.
1164 * So we use one of them to reach the intr reg
1166 ena_com_unmask_intr(rx_ring
->ena_com_io_cq
, &intr_reg
);
1169 static inline void ena_update_ring_numa_node(struct ena_ring
*tx_ring
,
1170 struct ena_ring
*rx_ring
)
1172 int cpu
= get_cpu();
1175 /* Check only one ring since the 2 rings are running on the same cpu */
1176 if (likely(tx_ring
->cpu
== cpu
))
1179 numa_node
= cpu_to_node(cpu
);
1182 if (numa_node
!= NUMA_NO_NODE
) {
1183 ena_com_update_numa_node(tx_ring
->ena_com_io_cq
, numa_node
);
1184 ena_com_update_numa_node(rx_ring
->ena_com_io_cq
, numa_node
);
1195 static int ena_io_poll(struct napi_struct
*napi
, int budget
)
1197 struct ena_napi
*ena_napi
= container_of(napi
, struct ena_napi
, napi
);
1198 struct ena_ring
*tx_ring
, *rx_ring
;
1203 int napi_comp_call
= 0;
1206 tx_ring
= ena_napi
->tx_ring
;
1207 rx_ring
= ena_napi
->rx_ring
;
1209 tx_budget
= tx_ring
->ring_size
/ ENA_TX_POLL_BUDGET_DIVIDER
;
1211 if (!test_bit(ENA_FLAG_DEV_UP
, &tx_ring
->adapter
->flags
) ||
1212 test_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
)) {
1213 napi_complete_done(napi
, 0);
1217 tx_work_done
= ena_clean_tx_irq(tx_ring
, tx_budget
);
1218 rx_work_done
= ena_clean_rx_irq(rx_ring
, napi
, budget
);
1220 /* If the device is about to reset or down, avoid unmask
1221 * the interrupt and return 0 so NAPI won't reschedule
1223 if (unlikely(!test_bit(ENA_FLAG_DEV_UP
, &tx_ring
->adapter
->flags
) ||
1224 test_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
))) {
1225 napi_complete_done(napi
, 0);
1228 } else if ((budget
> rx_work_done
) && (tx_budget
> tx_work_done
)) {
1231 /* Update numa and unmask the interrupt only when schedule
1232 * from the interrupt context (vs from sk_busy_loop)
1234 if (napi_complete_done(napi
, rx_work_done
)) {
1235 /* Tx and Rx share the same interrupt vector */
1236 if (ena_com_get_adaptive_moderation_enabled(rx_ring
->ena_dev
))
1237 ena_adjust_intr_moderation(rx_ring
, tx_ring
);
1239 ena_unmask_interrupt(tx_ring
, rx_ring
);
1242 ena_update_ring_numa_node(tx_ring
, rx_ring
);
1249 u64_stats_update_begin(&tx_ring
->syncp
);
1250 tx_ring
->tx_stats
.napi_comp
+= napi_comp_call
;
1251 tx_ring
->tx_stats
.tx_poll
++;
1252 u64_stats_update_end(&tx_ring
->syncp
);
1257 static irqreturn_t
ena_intr_msix_mgmnt(int irq
, void *data
)
1259 struct ena_adapter
*adapter
= (struct ena_adapter
*)data
;
1261 ena_com_admin_q_comp_intr_handler(adapter
->ena_dev
);
1263 /* Don't call the aenq handler before probe is done */
1264 if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
)))
1265 ena_com_aenq_intr_handler(adapter
->ena_dev
, data
);
1270 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1271 * @irq: interrupt number
1272 * @data: pointer to a network interface private napi device structure
1274 static irqreturn_t
ena_intr_msix_io(int irq
, void *data
)
1276 struct ena_napi
*ena_napi
= data
;
1278 ena_napi
->tx_ring
->first_interrupt
= true;
1279 ena_napi
->rx_ring
->first_interrupt
= true;
1281 napi_schedule_irqoff(&ena_napi
->napi
);
1286 /* Reserve a single MSI-X vector for management (admin + aenq).
1287 * plus reserve one vector for each potential io queue.
1288 * the number of potential io queues is the minimum of what the device
1289 * supports and the number of vCPUs.
1291 static int ena_enable_msix(struct ena_adapter
*adapter
, int num_queues
)
1293 int msix_vecs
, irq_cnt
;
1295 if (test_bit(ENA_FLAG_MSIX_ENABLED
, &adapter
->flags
)) {
1296 netif_err(adapter
, probe
, adapter
->netdev
,
1297 "Error, MSI-X is already enabled\n");
1301 /* Reserved the max msix vectors we might need */
1302 msix_vecs
= ENA_MAX_MSIX_VEC(num_queues
);
1304 netif_dbg(adapter
, probe
, adapter
->netdev
,
1305 "trying to enable MSI-X, vectors %d\n", msix_vecs
);
1307 irq_cnt
= pci_alloc_irq_vectors(adapter
->pdev
, ENA_MIN_MSIX_VEC
,
1308 msix_vecs
, PCI_IRQ_MSIX
);
1311 netif_err(adapter
, probe
, adapter
->netdev
,
1312 "Failed to enable MSI-X. irq_cnt %d\n", irq_cnt
);
1316 if (irq_cnt
!= msix_vecs
) {
1317 netif_notice(adapter
, probe
, adapter
->netdev
,
1318 "enable only %d MSI-X (out of %d), reduce the number of queues\n",
1319 irq_cnt
, msix_vecs
);
1320 adapter
->num_queues
= irq_cnt
- ENA_ADMIN_MSIX_VEC
;
1323 if (ena_init_rx_cpu_rmap(adapter
))
1324 netif_warn(adapter
, probe
, adapter
->netdev
,
1325 "Failed to map IRQs to CPUs\n");
1327 adapter
->msix_vecs
= irq_cnt
;
1328 set_bit(ENA_FLAG_MSIX_ENABLED
, &adapter
->flags
);
1333 static void ena_setup_mgmnt_intr(struct ena_adapter
*adapter
)
1337 snprintf(adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].name
,
1338 ENA_IRQNAME_SIZE
, "ena-mgmnt@pci:%s",
1339 pci_name(adapter
->pdev
));
1340 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].handler
=
1341 ena_intr_msix_mgmnt
;
1342 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].data
= adapter
;
1343 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].vector
=
1344 pci_irq_vector(adapter
->pdev
, ENA_MGMNT_IRQ_IDX
);
1345 cpu
= cpumask_first(cpu_online_mask
);
1346 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].cpu
= cpu
;
1347 cpumask_set_cpu(cpu
,
1348 &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].affinity_hint_mask
);
1351 static void ena_setup_io_intr(struct ena_adapter
*adapter
)
1353 struct net_device
*netdev
;
1354 int irq_idx
, i
, cpu
;
1356 netdev
= adapter
->netdev
;
1358 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1359 irq_idx
= ENA_IO_IRQ_IDX(i
);
1360 cpu
= i
% num_online_cpus();
1362 snprintf(adapter
->irq_tbl
[irq_idx
].name
, ENA_IRQNAME_SIZE
,
1363 "%s-Tx-Rx-%d", netdev
->name
, i
);
1364 adapter
->irq_tbl
[irq_idx
].handler
= ena_intr_msix_io
;
1365 adapter
->irq_tbl
[irq_idx
].data
= &adapter
->ena_napi
[i
];
1366 adapter
->irq_tbl
[irq_idx
].vector
=
1367 pci_irq_vector(adapter
->pdev
, irq_idx
);
1368 adapter
->irq_tbl
[irq_idx
].cpu
= cpu
;
1370 cpumask_set_cpu(cpu
,
1371 &adapter
->irq_tbl
[irq_idx
].affinity_hint_mask
);
1375 static int ena_request_mgmnt_irq(struct ena_adapter
*adapter
)
1377 unsigned long flags
= 0;
1378 struct ena_irq
*irq
;
1381 irq
= &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
];
1382 rc
= request_irq(irq
->vector
, irq
->handler
, flags
, irq
->name
,
1385 netif_err(adapter
, probe
, adapter
->netdev
,
1386 "failed to request admin irq\n");
1390 netif_dbg(adapter
, probe
, adapter
->netdev
,
1391 "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1392 irq
->affinity_hint_mask
.bits
[0], irq
->vector
);
1394 irq_set_affinity_hint(irq
->vector
, &irq
->affinity_hint_mask
);
1399 static int ena_request_io_irq(struct ena_adapter
*adapter
)
1401 unsigned long flags
= 0;
1402 struct ena_irq
*irq
;
1405 if (!test_bit(ENA_FLAG_MSIX_ENABLED
, &adapter
->flags
)) {
1406 netif_err(adapter
, ifup
, adapter
->netdev
,
1407 "Failed to request I/O IRQ: MSI-X is not enabled\n");
1411 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++) {
1412 irq
= &adapter
->irq_tbl
[i
];
1413 rc
= request_irq(irq
->vector
, irq
->handler
, flags
, irq
->name
,
1416 netif_err(adapter
, ifup
, adapter
->netdev
,
1417 "Failed to request I/O IRQ. index %d rc %d\n",
1422 netif_dbg(adapter
, ifup
, adapter
->netdev
,
1423 "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1424 i
, irq
->affinity_hint_mask
.bits
[0], irq
->vector
);
1426 irq_set_affinity_hint(irq
->vector
, &irq
->affinity_hint_mask
);
1432 for (k
= ENA_IO_IRQ_FIRST_IDX
; k
< i
; k
++) {
1433 irq
= &adapter
->irq_tbl
[k
];
1434 free_irq(irq
->vector
, irq
->data
);
1440 static void ena_free_mgmnt_irq(struct ena_adapter
*adapter
)
1442 struct ena_irq
*irq
;
1444 irq
= &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
];
1445 synchronize_irq(irq
->vector
);
1446 irq_set_affinity_hint(irq
->vector
, NULL
);
1447 free_irq(irq
->vector
, irq
->data
);
1450 static void ena_free_io_irq(struct ena_adapter
*adapter
)
1452 struct ena_irq
*irq
;
1455 #ifdef CONFIG_RFS_ACCEL
1456 if (adapter
->msix_vecs
>= 1) {
1457 free_irq_cpu_rmap(adapter
->netdev
->rx_cpu_rmap
);
1458 adapter
->netdev
->rx_cpu_rmap
= NULL
;
1460 #endif /* CONFIG_RFS_ACCEL */
1462 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++) {
1463 irq
= &adapter
->irq_tbl
[i
];
1464 irq_set_affinity_hint(irq
->vector
, NULL
);
1465 free_irq(irq
->vector
, irq
->data
);
1469 static void ena_disable_msix(struct ena_adapter
*adapter
)
1471 if (test_and_clear_bit(ENA_FLAG_MSIX_ENABLED
, &adapter
->flags
))
1472 pci_free_irq_vectors(adapter
->pdev
);
1475 static void ena_disable_io_intr_sync(struct ena_adapter
*adapter
)
1479 if (!netif_running(adapter
->netdev
))
1482 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++)
1483 synchronize_irq(adapter
->irq_tbl
[i
].vector
);
1486 static void ena_del_napi(struct ena_adapter
*adapter
)
1490 for (i
= 0; i
< adapter
->num_queues
; i
++)
1491 netif_napi_del(&adapter
->ena_napi
[i
].napi
);
1494 static void ena_init_napi(struct ena_adapter
*adapter
)
1496 struct ena_napi
*napi
;
1499 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1500 napi
= &adapter
->ena_napi
[i
];
1502 netif_napi_add(adapter
->netdev
,
1503 &adapter
->ena_napi
[i
].napi
,
1506 napi
->rx_ring
= &adapter
->rx_ring
[i
];
1507 napi
->tx_ring
= &adapter
->tx_ring
[i
];
1512 static void ena_napi_disable_all(struct ena_adapter
*adapter
)
1516 for (i
= 0; i
< adapter
->num_queues
; i
++)
1517 napi_disable(&adapter
->ena_napi
[i
].napi
);
1520 static void ena_napi_enable_all(struct ena_adapter
*adapter
)
1524 for (i
= 0; i
< adapter
->num_queues
; i
++)
1525 napi_enable(&adapter
->ena_napi
[i
].napi
);
1528 static void ena_restore_ethtool_params(struct ena_adapter
*adapter
)
1530 adapter
->tx_usecs
= 0;
1531 adapter
->rx_usecs
= 0;
1532 adapter
->tx_frames
= 1;
1533 adapter
->rx_frames
= 1;
1536 /* Configure the Rx forwarding */
1537 static int ena_rss_configure(struct ena_adapter
*adapter
)
1539 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1542 /* In case the RSS table wasn't initialized by probe */
1543 if (!ena_dev
->rss
.tbl_log_size
) {
1544 rc
= ena_rss_init_default(adapter
);
1545 if (rc
&& (rc
!= -EOPNOTSUPP
)) {
1546 netif_err(adapter
, ifup
, adapter
->netdev
,
1547 "Failed to init RSS rc: %d\n", rc
);
1552 /* Set indirect table */
1553 rc
= ena_com_indirect_table_set(ena_dev
);
1554 if (unlikely(rc
&& rc
!= -EOPNOTSUPP
))
1557 /* Configure hash function (if supported) */
1558 rc
= ena_com_set_hash_function(ena_dev
);
1559 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
)))
1562 /* Configure hash inputs (if supported) */
1563 rc
= ena_com_set_hash_ctrl(ena_dev
);
1564 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
)))
1570 static int ena_up_complete(struct ena_adapter
*adapter
)
1574 rc
= ena_rss_configure(adapter
);
1578 ena_init_napi(adapter
);
1580 ena_change_mtu(adapter
->netdev
, adapter
->netdev
->mtu
);
1582 ena_refill_all_rx_bufs(adapter
);
1584 /* enable transmits */
1585 netif_tx_start_all_queues(adapter
->netdev
);
1587 ena_restore_ethtool_params(adapter
);
1589 ena_napi_enable_all(adapter
);
1594 static int ena_create_io_tx_queue(struct ena_adapter
*adapter
, int qid
)
1596 struct ena_com_create_io_ctx ctx
= { 0 };
1597 struct ena_com_dev
*ena_dev
;
1598 struct ena_ring
*tx_ring
;
1603 ena_dev
= adapter
->ena_dev
;
1605 tx_ring
= &adapter
->tx_ring
[qid
];
1606 msix_vector
= ENA_IO_IRQ_IDX(qid
);
1607 ena_qid
= ENA_IO_TXQ_IDX(qid
);
1609 ctx
.direction
= ENA_COM_IO_QUEUE_DIRECTION_TX
;
1611 ctx
.mem_queue_type
= ena_dev
->tx_mem_queue_type
;
1612 ctx
.msix_vector
= msix_vector
;
1613 ctx
.queue_size
= adapter
->tx_ring_size
;
1614 ctx
.numa_node
= cpu_to_node(tx_ring
->cpu
);
1616 rc
= ena_com_create_io_queue(ena_dev
, &ctx
);
1618 netif_err(adapter
, ifup
, adapter
->netdev
,
1619 "Failed to create I/O TX queue num %d rc: %d\n",
1624 rc
= ena_com_get_io_handlers(ena_dev
, ena_qid
,
1625 &tx_ring
->ena_com_io_sq
,
1626 &tx_ring
->ena_com_io_cq
);
1628 netif_err(adapter
, ifup
, adapter
->netdev
,
1629 "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1631 ena_com_destroy_io_queue(ena_dev
, ena_qid
);
1635 ena_com_update_numa_node(tx_ring
->ena_com_io_cq
, ctx
.numa_node
);
1639 static int ena_create_all_io_tx_queues(struct ena_adapter
*adapter
)
1641 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1644 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1645 rc
= ena_create_io_tx_queue(adapter
, i
);
1654 ena_com_destroy_io_queue(ena_dev
, ENA_IO_TXQ_IDX(i
));
1659 static int ena_create_io_rx_queue(struct ena_adapter
*adapter
, int qid
)
1661 struct ena_com_dev
*ena_dev
;
1662 struct ena_com_create_io_ctx ctx
= { 0 };
1663 struct ena_ring
*rx_ring
;
1668 ena_dev
= adapter
->ena_dev
;
1670 rx_ring
= &adapter
->rx_ring
[qid
];
1671 msix_vector
= ENA_IO_IRQ_IDX(qid
);
1672 ena_qid
= ENA_IO_RXQ_IDX(qid
);
1675 ctx
.direction
= ENA_COM_IO_QUEUE_DIRECTION_RX
;
1676 ctx
.mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_HOST
;
1677 ctx
.msix_vector
= msix_vector
;
1678 ctx
.queue_size
= adapter
->rx_ring_size
;
1679 ctx
.numa_node
= cpu_to_node(rx_ring
->cpu
);
1681 rc
= ena_com_create_io_queue(ena_dev
, &ctx
);
1683 netif_err(adapter
, ifup
, adapter
->netdev
,
1684 "Failed to create I/O RX queue num %d rc: %d\n",
1689 rc
= ena_com_get_io_handlers(ena_dev
, ena_qid
,
1690 &rx_ring
->ena_com_io_sq
,
1691 &rx_ring
->ena_com_io_cq
);
1693 netif_err(adapter
, ifup
, adapter
->netdev
,
1694 "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1696 ena_com_destroy_io_queue(ena_dev
, ena_qid
);
1700 ena_com_update_numa_node(rx_ring
->ena_com_io_cq
, ctx
.numa_node
);
1705 static int ena_create_all_io_rx_queues(struct ena_adapter
*adapter
)
1707 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1710 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1711 rc
= ena_create_io_rx_queue(adapter
, i
);
1720 ena_com_destroy_io_queue(ena_dev
, ENA_IO_RXQ_IDX(i
));
1725 static int ena_up(struct ena_adapter
*adapter
)
1729 netdev_dbg(adapter
->netdev
, "%s\n", __func__
);
1731 ena_setup_io_intr(adapter
);
1733 rc
= ena_request_io_irq(adapter
);
1737 /* allocate transmit descriptors */
1738 rc
= ena_setup_all_tx_resources(adapter
);
1742 /* allocate receive descriptors */
1743 rc
= ena_setup_all_rx_resources(adapter
);
1747 /* Create TX queues */
1748 rc
= ena_create_all_io_tx_queues(adapter
);
1750 goto err_create_tx_queues
;
1752 /* Create RX queues */
1753 rc
= ena_create_all_io_rx_queues(adapter
);
1755 goto err_create_rx_queues
;
1757 rc
= ena_up_complete(adapter
);
1761 if (test_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
))
1762 netif_carrier_on(adapter
->netdev
);
1764 u64_stats_update_begin(&adapter
->syncp
);
1765 adapter
->dev_stats
.interface_up
++;
1766 u64_stats_update_end(&adapter
->syncp
);
1768 set_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
1770 /* Enable completion queues interrupt */
1771 for (i
= 0; i
< adapter
->num_queues
; i
++)
1772 ena_unmask_interrupt(&adapter
->tx_ring
[i
],
1773 &adapter
->rx_ring
[i
]);
1775 /* schedule napi in case we had pending packets
1776 * from the last time we disable napi
1778 for (i
= 0; i
< adapter
->num_queues
; i
++)
1779 napi_schedule(&adapter
->ena_napi
[i
].napi
);
1784 ena_destroy_all_rx_queues(adapter
);
1785 err_create_rx_queues
:
1786 ena_destroy_all_tx_queues(adapter
);
1787 err_create_tx_queues
:
1788 ena_free_all_io_rx_resources(adapter
);
1790 ena_free_all_io_tx_resources(adapter
);
1792 ena_free_io_irq(adapter
);
1798 static void ena_down(struct ena_adapter
*adapter
)
1800 netif_info(adapter
, ifdown
, adapter
->netdev
, "%s\n", __func__
);
1802 clear_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
1804 u64_stats_update_begin(&adapter
->syncp
);
1805 adapter
->dev_stats
.interface_down
++;
1806 u64_stats_update_end(&adapter
->syncp
);
1808 netif_carrier_off(adapter
->netdev
);
1809 netif_tx_disable(adapter
->netdev
);
1811 /* After this point the napi handler won't enable the tx queue */
1812 ena_napi_disable_all(adapter
);
1814 /* After destroy the queue there won't be any new interrupts */
1816 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
)) {
1819 rc
= ena_com_dev_reset(adapter
->ena_dev
, adapter
->reset_reason
);
1821 dev_err(&adapter
->pdev
->dev
, "Device reset failed\n");
1824 ena_destroy_all_io_queues(adapter
);
1826 ena_disable_io_intr_sync(adapter
);
1827 ena_free_io_irq(adapter
);
1828 ena_del_napi(adapter
);
1830 ena_free_all_tx_bufs(adapter
);
1831 ena_free_all_rx_bufs(adapter
);
1832 ena_free_all_io_tx_resources(adapter
);
1833 ena_free_all_io_rx_resources(adapter
);
1836 /* ena_open - Called when a network interface is made active
1837 * @netdev: network interface device structure
1839 * Returns 0 on success, negative value on failure
1841 * The open entry point is called when a network interface is made
1842 * active by the system (IFF_UP). At this point all resources needed
1843 * for transmit and receive operations are allocated, the interrupt
1844 * handler is registered with the OS, the watchdog timer is started,
1845 * and the stack is notified that the interface is ready.
1847 static int ena_open(struct net_device
*netdev
)
1849 struct ena_adapter
*adapter
= netdev_priv(netdev
);
1852 /* Notify the stack of the actual queue counts. */
1853 rc
= netif_set_real_num_tx_queues(netdev
, adapter
->num_queues
);
1855 netif_err(adapter
, ifup
, netdev
, "Can't set num tx queues\n");
1859 rc
= netif_set_real_num_rx_queues(netdev
, adapter
->num_queues
);
1861 netif_err(adapter
, ifup
, netdev
, "Can't set num rx queues\n");
1865 rc
= ena_up(adapter
);
1872 /* ena_close - Disables a network interface
1873 * @netdev: network interface device structure
1875 * Returns 0, this is not allowed to fail
1877 * The close entry point is called when an interface is de-activated
1878 * by the OS. The hardware is still under the drivers control, but
1879 * needs to be disabled. A global MAC reset is issued to stop the
1880 * hardware, and all transmit and receive resources are freed.
1882 static int ena_close(struct net_device
*netdev
)
1884 struct ena_adapter
*adapter
= netdev_priv(netdev
);
1886 netif_dbg(adapter
, ifdown
, netdev
, "%s\n", __func__
);
1888 if (test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
1891 /* Check for device status and issue reset if needed*/
1892 check_for_admin_com_state(adapter
);
1893 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
1894 netif_err(adapter
, ifdown
, adapter
->netdev
,
1895 "Destroy failure, restarting device\n");
1896 ena_dump_stats_to_dmesg(adapter
);
1897 /* rtnl lock already obtained in dev_ioctl() layer */
1898 ena_destroy_device(adapter
, false);
1899 ena_restore_device(adapter
);
1905 static void ena_tx_csum(struct ena_com_tx_ctx
*ena_tx_ctx
, struct sk_buff
*skb
)
1907 u32 mss
= skb_shinfo(skb
)->gso_size
;
1908 struct ena_com_tx_meta
*ena_meta
= &ena_tx_ctx
->ena_meta
;
1911 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) || mss
) {
1912 ena_tx_ctx
->l4_csum_enable
= 1;
1914 ena_tx_ctx
->tso_enable
= 1;
1915 ena_meta
->l4_hdr_len
= tcp_hdr(skb
)->doff
;
1916 ena_tx_ctx
->l4_csum_partial
= 0;
1918 ena_tx_ctx
->tso_enable
= 0;
1919 ena_meta
->l4_hdr_len
= 0;
1920 ena_tx_ctx
->l4_csum_partial
= 1;
1923 switch (ip_hdr(skb
)->version
) {
1925 ena_tx_ctx
->l3_proto
= ENA_ETH_IO_L3_PROTO_IPV4
;
1926 if (ip_hdr(skb
)->frag_off
& htons(IP_DF
))
1929 ena_tx_ctx
->l3_csum_enable
= 1;
1930 l4_protocol
= ip_hdr(skb
)->protocol
;
1933 ena_tx_ctx
->l3_proto
= ENA_ETH_IO_L3_PROTO_IPV6
;
1934 l4_protocol
= ipv6_hdr(skb
)->nexthdr
;
1940 if (l4_protocol
== IPPROTO_TCP
)
1941 ena_tx_ctx
->l4_proto
= ENA_ETH_IO_L4_PROTO_TCP
;
1943 ena_tx_ctx
->l4_proto
= ENA_ETH_IO_L4_PROTO_UDP
;
1945 ena_meta
->mss
= mss
;
1946 ena_meta
->l3_hdr_len
= skb_network_header_len(skb
);
1947 ena_meta
->l3_hdr_offset
= skb_network_offset(skb
);
1948 ena_tx_ctx
->meta_valid
= 1;
1951 ena_tx_ctx
->meta_valid
= 0;
1955 static int ena_check_and_linearize_skb(struct ena_ring
*tx_ring
,
1956 struct sk_buff
*skb
)
1958 int num_frags
, header_len
, rc
;
1960 num_frags
= skb_shinfo(skb
)->nr_frags
;
1961 header_len
= skb_headlen(skb
);
1963 if (num_frags
< tx_ring
->sgl_size
)
1966 if ((num_frags
== tx_ring
->sgl_size
) &&
1967 (header_len
< tx_ring
->tx_max_header_size
))
1970 u64_stats_update_begin(&tx_ring
->syncp
);
1971 tx_ring
->tx_stats
.linearize
++;
1972 u64_stats_update_end(&tx_ring
->syncp
);
1974 rc
= skb_linearize(skb
);
1976 u64_stats_update_begin(&tx_ring
->syncp
);
1977 tx_ring
->tx_stats
.linearize_failed
++;
1978 u64_stats_update_end(&tx_ring
->syncp
);
1984 /* Called with netif_tx_lock. */
1985 static netdev_tx_t
ena_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1987 struct ena_adapter
*adapter
= netdev_priv(dev
);
1988 struct ena_tx_buffer
*tx_info
;
1989 struct ena_com_tx_ctx ena_tx_ctx
;
1990 struct ena_ring
*tx_ring
;
1991 struct netdev_queue
*txq
;
1992 struct ena_com_buf
*ena_buf
;
2000 int qid
, rc
, nb_hw_desc
;
2003 netif_dbg(adapter
, tx_queued
, dev
, "%s skb %p\n", __func__
, skb
);
2004 /* Determine which tx ring we will be placed on */
2005 qid
= skb_get_queue_mapping(skb
);
2006 tx_ring
= &adapter
->tx_ring
[qid
];
2007 txq
= netdev_get_tx_queue(dev
, qid
);
2009 rc
= ena_check_and_linearize_skb(tx_ring
, skb
);
2011 goto error_drop_packet
;
2013 skb_tx_timestamp(skb
);
2014 len
= skb_headlen(skb
);
2016 next_to_use
= tx_ring
->next_to_use
;
2017 req_id
= tx_ring
->free_tx_ids
[next_to_use
];
2018 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
2019 tx_info
->num_of_bufs
= 0;
2021 WARN(tx_info
->skb
, "SKB isn't NULL req_id %d\n", req_id
);
2022 ena_buf
= tx_info
->bufs
;
2025 if (tx_ring
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
2026 /* prepared the push buffer */
2027 push_len
= min_t(u32
, len
, tx_ring
->tx_max_header_size
);
2028 header_len
= push_len
;
2029 push_hdr
= skb
->data
;
2032 header_len
= min_t(u32
, len
, tx_ring
->tx_max_header_size
);
2036 netif_dbg(adapter
, tx_queued
, dev
,
2037 "skb: %p header_buf->vaddr: %p push_len: %d\n", skb
,
2038 push_hdr
, push_len
);
2040 if (len
> push_len
) {
2041 dma
= dma_map_single(tx_ring
->dev
, skb
->data
+ push_len
,
2042 len
- push_len
, DMA_TO_DEVICE
);
2043 if (dma_mapping_error(tx_ring
->dev
, dma
))
2044 goto error_report_dma_error
;
2046 ena_buf
->paddr
= dma
;
2047 ena_buf
->len
= len
- push_len
;
2050 tx_info
->num_of_bufs
++;
2053 last_frag
= skb_shinfo(skb
)->nr_frags
;
2055 for (i
= 0; i
< last_frag
; i
++) {
2056 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
2058 len
= skb_frag_size(frag
);
2059 dma
= skb_frag_dma_map(tx_ring
->dev
, frag
, 0, len
,
2061 if (dma_mapping_error(tx_ring
->dev
, dma
))
2062 goto error_report_dma_error
;
2064 ena_buf
->paddr
= dma
;
2069 tx_info
->num_of_bufs
+= last_frag
;
2071 memset(&ena_tx_ctx
, 0x0, sizeof(struct ena_com_tx_ctx
));
2072 ena_tx_ctx
.ena_bufs
= tx_info
->bufs
;
2073 ena_tx_ctx
.push_header
= push_hdr
;
2074 ena_tx_ctx
.num_bufs
= tx_info
->num_of_bufs
;
2075 ena_tx_ctx
.req_id
= req_id
;
2076 ena_tx_ctx
.header_len
= header_len
;
2078 /* set flags and meta data */
2079 ena_tx_csum(&ena_tx_ctx
, skb
);
2081 /* prepare the packet's descriptors to dma engine */
2082 rc
= ena_com_prepare_tx(tx_ring
->ena_com_io_sq
, &ena_tx_ctx
,
2086 netif_err(adapter
, tx_queued
, dev
,
2087 "failed to prepare tx bufs\n");
2088 u64_stats_update_begin(&tx_ring
->syncp
);
2089 tx_ring
->tx_stats
.queue_stop
++;
2090 tx_ring
->tx_stats
.prepare_ctx_err
++;
2091 u64_stats_update_end(&tx_ring
->syncp
);
2092 netif_tx_stop_queue(txq
);
2093 goto error_unmap_dma
;
2096 netdev_tx_sent_queue(txq
, skb
->len
);
2098 u64_stats_update_begin(&tx_ring
->syncp
);
2099 tx_ring
->tx_stats
.cnt
++;
2100 tx_ring
->tx_stats
.bytes
+= skb
->len
;
2101 u64_stats_update_end(&tx_ring
->syncp
);
2103 tx_info
->tx_descs
= nb_hw_desc
;
2104 tx_info
->last_jiffies
= jiffies
;
2105 tx_info
->print_once
= 0;
2107 tx_ring
->next_to_use
= ENA_TX_RING_IDX_NEXT(next_to_use
,
2108 tx_ring
->ring_size
);
2110 /* stop the queue when no more space available, the packet can have up
2111 * to sgl_size + 2. one for the meta descriptor and one for header
2112 * (if the header is larger than tx_max_header_size).
2114 if (unlikely(ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) <
2115 (tx_ring
->sgl_size
+ 2))) {
2116 netif_dbg(adapter
, tx_queued
, dev
, "%s stop queue %d\n",
2119 netif_tx_stop_queue(txq
);
2120 u64_stats_update_begin(&tx_ring
->syncp
);
2121 tx_ring
->tx_stats
.queue_stop
++;
2122 u64_stats_update_end(&tx_ring
->syncp
);
2124 /* There is a rare condition where this function decide to
2125 * stop the queue but meanwhile clean_tx_irq updates
2126 * next_to_completion and terminates.
2127 * The queue will remain stopped forever.
2128 * To solve this issue add a mb() to make sure that
2129 * netif_tx_stop_queue() write is vissible before checking if
2130 * there is additional space in the queue.
2134 if (ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
)
2135 > ENA_TX_WAKEUP_THRESH
) {
2136 netif_tx_wake_queue(txq
);
2137 u64_stats_update_begin(&tx_ring
->syncp
);
2138 tx_ring
->tx_stats
.queue_wakeup
++;
2139 u64_stats_update_end(&tx_ring
->syncp
);
2143 if (netif_xmit_stopped(txq
) || !skb
->xmit_more
) {
2144 /* trigger the dma engine. ena_com_write_sq_doorbell()
2147 ena_com_write_sq_doorbell(tx_ring
->ena_com_io_sq
);
2148 u64_stats_update_begin(&tx_ring
->syncp
);
2149 tx_ring
->tx_stats
.doorbells
++;
2150 u64_stats_update_end(&tx_ring
->syncp
);
2153 return NETDEV_TX_OK
;
2155 error_report_dma_error
:
2156 u64_stats_update_begin(&tx_ring
->syncp
);
2157 tx_ring
->tx_stats
.dma_mapping_err
++;
2158 u64_stats_update_end(&tx_ring
->syncp
);
2159 netdev_warn(adapter
->netdev
, "failed to map skb\n");
2161 tx_info
->skb
= NULL
;
2165 /* save value of frag that failed */
2168 /* start back at beginning and unmap skb */
2169 tx_info
->skb
= NULL
;
2170 ena_buf
= tx_info
->bufs
;
2171 dma_unmap_single(tx_ring
->dev
, dma_unmap_addr(ena_buf
, paddr
),
2172 dma_unmap_len(ena_buf
, len
), DMA_TO_DEVICE
);
2174 /* unmap remaining mapped pages */
2175 for (i
= 0; i
< last_frag
; i
++) {
2177 dma_unmap_page(tx_ring
->dev
, dma_unmap_addr(ena_buf
, paddr
),
2178 dma_unmap_len(ena_buf
, len
), DMA_TO_DEVICE
);
2185 return NETDEV_TX_OK
;
2188 static u16
ena_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
2189 void *accel_priv
, select_queue_fallback_t fallback
)
2192 /* we suspect that this is good for in--kernel network services that
2193 * want to loop incoming skb rx to tx in normal user generated traffic,
2194 * most probably we will not get to this
2196 if (skb_rx_queue_recorded(skb
))
2197 qid
= skb_get_rx_queue(skb
);
2199 qid
= fallback(dev
, skb
);
2204 static void ena_config_host_info(struct ena_com_dev
*ena_dev
)
2206 struct ena_admin_host_info
*host_info
;
2209 /* Allocate only the host info */
2210 rc
= ena_com_allocate_host_info(ena_dev
);
2212 pr_err("Cannot allocate host info\n");
2216 host_info
= ena_dev
->host_attr
.host_info
;
2218 host_info
->os_type
= ENA_ADMIN_OS_LINUX
;
2219 host_info
->kernel_ver
= LINUX_VERSION_CODE
;
2220 strncpy(host_info
->kernel_ver_str
, utsname()->version
,
2221 sizeof(host_info
->kernel_ver_str
) - 1);
2222 host_info
->os_dist
= 0;
2223 strncpy(host_info
->os_dist_str
, utsname()->release
,
2224 sizeof(host_info
->os_dist_str
) - 1);
2225 host_info
->driver_version
=
2226 (DRV_MODULE_VER_MAJOR
) |
2227 (DRV_MODULE_VER_MINOR
<< ENA_ADMIN_HOST_INFO_MINOR_SHIFT
) |
2228 (DRV_MODULE_VER_SUBMINOR
<< ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT
);
2230 rc
= ena_com_set_host_attributes(ena_dev
);
2232 if (rc
== -EOPNOTSUPP
)
2233 pr_warn("Cannot set host attributes\n");
2235 pr_err("Cannot set host attributes\n");
2243 ena_com_delete_host_info(ena_dev
);
2246 static void ena_config_debug_area(struct ena_adapter
*adapter
)
2248 u32 debug_area_size
;
2251 ss_count
= ena_get_sset_count(adapter
->netdev
, ETH_SS_STATS
);
2252 if (ss_count
<= 0) {
2253 netif_err(adapter
, drv
, adapter
->netdev
,
2254 "SS count is negative\n");
2258 /* allocate 32 bytes for each string and 64bit for the value */
2259 debug_area_size
= ss_count
* ETH_GSTRING_LEN
+ sizeof(u64
) * ss_count
;
2261 rc
= ena_com_allocate_debug_area(adapter
->ena_dev
, debug_area_size
);
2263 pr_err("Cannot allocate debug area\n");
2267 rc
= ena_com_set_host_attributes(adapter
->ena_dev
);
2269 if (rc
== -EOPNOTSUPP
)
2270 netif_warn(adapter
, drv
, adapter
->netdev
,
2271 "Cannot set host attributes\n");
2273 netif_err(adapter
, drv
, adapter
->netdev
,
2274 "Cannot set host attributes\n");
2280 ena_com_delete_debug_area(adapter
->ena_dev
);
2283 static void ena_get_stats64(struct net_device
*netdev
,
2284 struct rtnl_link_stats64
*stats
)
2286 struct ena_adapter
*adapter
= netdev_priv(netdev
);
2287 struct ena_ring
*rx_ring
, *tx_ring
;
2292 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2295 for (i
= 0; i
< adapter
->num_queues
; i
++) {
2298 tx_ring
= &adapter
->tx_ring
[i
];
2301 start
= u64_stats_fetch_begin_irq(&tx_ring
->syncp
);
2302 packets
= tx_ring
->tx_stats
.cnt
;
2303 bytes
= tx_ring
->tx_stats
.bytes
;
2304 } while (u64_stats_fetch_retry_irq(&tx_ring
->syncp
, start
));
2306 stats
->tx_packets
+= packets
;
2307 stats
->tx_bytes
+= bytes
;
2309 rx_ring
= &adapter
->rx_ring
[i
];
2312 start
= u64_stats_fetch_begin_irq(&rx_ring
->syncp
);
2313 packets
= rx_ring
->rx_stats
.cnt
;
2314 bytes
= rx_ring
->rx_stats
.bytes
;
2315 } while (u64_stats_fetch_retry_irq(&rx_ring
->syncp
, start
));
2317 stats
->rx_packets
+= packets
;
2318 stats
->rx_bytes
+= bytes
;
2322 start
= u64_stats_fetch_begin_irq(&adapter
->syncp
);
2323 rx_drops
= adapter
->dev_stats
.rx_drops
;
2324 } while (u64_stats_fetch_retry_irq(&adapter
->syncp
, start
));
2326 stats
->rx_dropped
= rx_drops
;
2328 stats
->multicast
= 0;
2329 stats
->collisions
= 0;
2331 stats
->rx_length_errors
= 0;
2332 stats
->rx_crc_errors
= 0;
2333 stats
->rx_frame_errors
= 0;
2334 stats
->rx_fifo_errors
= 0;
2335 stats
->rx_missed_errors
= 0;
2336 stats
->tx_window_errors
= 0;
2338 stats
->rx_errors
= 0;
2339 stats
->tx_errors
= 0;
2342 static const struct net_device_ops ena_netdev_ops
= {
2343 .ndo_open
= ena_open
,
2344 .ndo_stop
= ena_close
,
2345 .ndo_start_xmit
= ena_start_xmit
,
2346 .ndo_select_queue
= ena_select_queue
,
2347 .ndo_get_stats64
= ena_get_stats64
,
2348 .ndo_tx_timeout
= ena_tx_timeout
,
2349 .ndo_change_mtu
= ena_change_mtu
,
2350 .ndo_set_mac_address
= NULL
,
2351 .ndo_validate_addr
= eth_validate_addr
,
2354 static int ena_device_validate_params(struct ena_adapter
*adapter
,
2355 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2357 struct net_device
*netdev
= adapter
->netdev
;
2360 rc
= ether_addr_equal(get_feat_ctx
->dev_attr
.mac_addr
,
2363 netif_err(adapter
, drv
, netdev
,
2364 "Error, mac address are different\n");
2368 if ((get_feat_ctx
->max_queues
.max_cq_num
< adapter
->num_queues
) ||
2369 (get_feat_ctx
->max_queues
.max_sq_num
< adapter
->num_queues
)) {
2370 netif_err(adapter
, drv
, netdev
,
2371 "Error, device doesn't support enough queues\n");
2375 if (get_feat_ctx
->dev_attr
.max_mtu
< netdev
->mtu
) {
2376 netif_err(adapter
, drv
, netdev
,
2377 "Error, device max mtu is smaller than netdev MTU\n");
2384 static int ena_device_init(struct ena_com_dev
*ena_dev
, struct pci_dev
*pdev
,
2385 struct ena_com_dev_get_features_ctx
*get_feat_ctx
,
2388 struct device
*dev
= &pdev
->dev
;
2389 bool readless_supported
;
2394 rc
= ena_com_mmio_reg_read_request_init(ena_dev
);
2396 dev_err(dev
, "failed to init mmio read less\n");
2400 /* The PCIe configuration space revision id indicate if mmio reg
2403 readless_supported
= !(pdev
->revision
& ENA_MMIO_DISABLE_REG_READ
);
2404 ena_com_set_mmio_read_mode(ena_dev
, readless_supported
);
2406 rc
= ena_com_dev_reset(ena_dev
, ENA_REGS_RESET_NORMAL
);
2408 dev_err(dev
, "Can not reset device\n");
2409 goto err_mmio_read_less
;
2412 rc
= ena_com_validate_version(ena_dev
);
2414 dev_err(dev
, "device version is too low\n");
2415 goto err_mmio_read_less
;
2418 dma_width
= ena_com_get_dma_width(ena_dev
);
2419 if (dma_width
< 0) {
2420 dev_err(dev
, "Invalid dma width value %d", dma_width
);
2422 goto err_mmio_read_less
;
2425 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(dma_width
));
2427 dev_err(dev
, "pci_set_dma_mask failed 0x%x\n", rc
);
2428 goto err_mmio_read_less
;
2431 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(dma_width
));
2433 dev_err(dev
, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2435 goto err_mmio_read_less
;
2438 /* ENA admin level init */
2439 rc
= ena_com_admin_init(ena_dev
, &aenq_handlers
, true);
2442 "Can not initialize ena admin queue with device\n");
2443 goto err_mmio_read_less
;
2446 /* To enable the msix interrupts the driver needs to know the number
2447 * of queues. So the driver uses polling mode to retrieve this
2450 ena_com_set_admin_polling_mode(ena_dev
, true);
2452 ena_config_host_info(ena_dev
);
2454 /* Get Device Attributes*/
2455 rc
= ena_com_get_dev_attr_feat(ena_dev
, get_feat_ctx
);
2457 dev_err(dev
, "Cannot get attribute for ena device rc=%d\n", rc
);
2458 goto err_admin_init
;
2461 /* Try to turn all the available aenq groups */
2462 aenq_groups
= BIT(ENA_ADMIN_LINK_CHANGE
) |
2463 BIT(ENA_ADMIN_FATAL_ERROR
) |
2464 BIT(ENA_ADMIN_WARNING
) |
2465 BIT(ENA_ADMIN_NOTIFICATION
) |
2466 BIT(ENA_ADMIN_KEEP_ALIVE
);
2468 aenq_groups
&= get_feat_ctx
->aenq
.supported_groups
;
2470 rc
= ena_com_set_aenq_config(ena_dev
, aenq_groups
);
2472 dev_err(dev
, "Cannot configure aenq groups rc= %d\n", rc
);
2473 goto err_admin_init
;
2476 *wd_state
= !!(aenq_groups
& BIT(ENA_ADMIN_KEEP_ALIVE
));
2481 ena_com_delete_host_info(ena_dev
);
2482 ena_com_admin_destroy(ena_dev
);
2484 ena_com_mmio_reg_read_request_destroy(ena_dev
);
2489 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter
*adapter
,
2492 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2493 struct device
*dev
= &adapter
->pdev
->dev
;
2496 rc
= ena_enable_msix(adapter
, io_vectors
);
2498 dev_err(dev
, "Can not reserve msix vectors\n");
2502 ena_setup_mgmnt_intr(adapter
);
2504 rc
= ena_request_mgmnt_irq(adapter
);
2506 dev_err(dev
, "Can not setup management interrupts\n");
2507 goto err_disable_msix
;
2510 ena_com_set_admin_polling_mode(ena_dev
, false);
2512 ena_com_admin_aenq_enable(ena_dev
);
2517 ena_disable_msix(adapter
);
2522 static void ena_destroy_device(struct ena_adapter
*adapter
, bool graceful
)
2524 struct net_device
*netdev
= adapter
->netdev
;
2525 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2528 if (!test_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
))
2531 netif_carrier_off(netdev
);
2533 del_timer_sync(&adapter
->timer_service
);
2535 dev_up
= test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
2536 adapter
->dev_up_before_reset
= dev_up
;
2539 ena_com_set_admin_running_state(ena_dev
, false);
2541 if (test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2544 /* Before releasing the ENA resources, a device reset is required.
2545 * (to prevent the device from accessing them).
2546 * In case the reset flag is set and the device is up, ena_down()
2547 * already perform the reset, so it can be skipped.
2549 if (!(test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
) && dev_up
))
2550 ena_com_dev_reset(adapter
->ena_dev
, adapter
->reset_reason
);
2552 ena_free_mgmnt_irq(adapter
);
2554 ena_disable_msix(adapter
);
2556 ena_com_abort_admin_commands(ena_dev
);
2558 ena_com_wait_for_abort_completion(ena_dev
);
2560 ena_com_admin_destroy(ena_dev
);
2562 ena_com_mmio_reg_read_request_destroy(ena_dev
);
2564 adapter
->reset_reason
= ENA_REGS_RESET_NORMAL
;
2566 clear_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2567 clear_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
2570 static int ena_restore_device(struct ena_adapter
*adapter
)
2572 struct ena_com_dev_get_features_ctx get_feat_ctx
;
2573 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2574 struct pci_dev
*pdev
= adapter
->pdev
;
2578 set_bit(ENA_FLAG_ONGOING_RESET
, &adapter
->flags
);
2579 rc
= ena_device_init(ena_dev
, adapter
->pdev
, &get_feat_ctx
, &wd_state
);
2581 dev_err(&pdev
->dev
, "Can not initialize device\n");
2584 adapter
->wd_state
= wd_state
;
2586 rc
= ena_device_validate_params(adapter
, &get_feat_ctx
);
2588 dev_err(&pdev
->dev
, "Validation of device parameters failed\n");
2589 goto err_device_destroy
;
2592 clear_bit(ENA_FLAG_ONGOING_RESET
, &adapter
->flags
);
2593 /* Make sure we don't have a race with AENQ Links state handler */
2594 if (test_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
))
2595 netif_carrier_on(adapter
->netdev
);
2597 rc
= ena_enable_msix_and_set_admin_interrupts(adapter
,
2598 adapter
->num_queues
);
2600 dev_err(&pdev
->dev
, "Enable MSI-X failed\n");
2601 goto err_device_destroy
;
2603 /* If the interface was up before the reset bring it up */
2604 if (adapter
->dev_up_before_reset
) {
2605 rc
= ena_up(adapter
);
2607 dev_err(&pdev
->dev
, "Failed to create I/O queues\n");
2608 goto err_disable_msix
;
2612 set_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
2613 mod_timer(&adapter
->timer_service
, round_jiffies(jiffies
+ HZ
));
2614 dev_err(&pdev
->dev
, "Device reset completed successfully\n");
2618 ena_free_mgmnt_irq(adapter
);
2619 ena_disable_msix(adapter
);
2621 ena_com_admin_destroy(ena_dev
);
2623 clear_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
2624 clear_bit(ENA_FLAG_ONGOING_RESET
, &adapter
->flags
);
2626 "Reset attempt failed. Can not reset the device\n");
2631 static void ena_fw_reset_device(struct work_struct
*work
)
2633 struct ena_adapter
*adapter
=
2634 container_of(work
, struct ena_adapter
, reset_task
);
2635 struct pci_dev
*pdev
= adapter
->pdev
;
2637 if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
2639 "device reset schedule while reset bit is off\n");
2643 ena_destroy_device(adapter
, false);
2644 ena_restore_device(adapter
);
2648 static int check_for_rx_interrupt_queue(struct ena_adapter
*adapter
,
2649 struct ena_ring
*rx_ring
)
2651 if (likely(rx_ring
->first_interrupt
))
2654 if (ena_com_cq_empty(rx_ring
->ena_com_io_cq
))
2657 rx_ring
->no_interrupt_event_cnt
++;
2659 if (rx_ring
->no_interrupt_event_cnt
== ENA_MAX_NO_INTERRUPT_ITERATIONS
) {
2660 netif_err(adapter
, rx_err
, adapter
->netdev
,
2661 "Potential MSIX issue on Rx side Queue = %d. Reset the device\n",
2663 adapter
->reset_reason
= ENA_REGS_RESET_MISS_INTERRUPT
;
2664 smp_mb__before_atomic();
2665 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2672 static int check_missing_comp_in_tx_queue(struct ena_adapter
*adapter
,
2673 struct ena_ring
*tx_ring
)
2675 struct ena_tx_buffer
*tx_buf
;
2676 unsigned long last_jiffies
;
2680 for (i
= 0; i
< tx_ring
->ring_size
; i
++) {
2681 tx_buf
= &tx_ring
->tx_buffer_info
[i
];
2682 last_jiffies
= tx_buf
->last_jiffies
;
2684 if (last_jiffies
== 0)
2685 /* no pending Tx at this location */
2688 if (unlikely(!tx_ring
->first_interrupt
&& time_is_before_jiffies(last_jiffies
+
2689 2 * adapter
->missing_tx_completion_to
))) {
2690 /* If after graceful period interrupt is still not
2691 * received, we schedule a reset
2693 netif_err(adapter
, tx_err
, adapter
->netdev
,
2694 "Potential MSIX issue on Tx side Queue = %d. Reset the device\n",
2696 adapter
->reset_reason
= ENA_REGS_RESET_MISS_INTERRUPT
;
2697 smp_mb__before_atomic();
2698 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2702 if (unlikely(time_is_before_jiffies(last_jiffies
+
2703 adapter
->missing_tx_completion_to
))) {
2704 if (!tx_buf
->print_once
)
2705 netif_notice(adapter
, tx_err
, adapter
->netdev
,
2706 "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2709 tx_buf
->print_once
= 1;
2714 if (unlikely(missed_tx
> adapter
->missing_tx_completion_threshold
)) {
2715 netif_err(adapter
, tx_err
, adapter
->netdev
,
2716 "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
2718 adapter
->missing_tx_completion_threshold
);
2719 adapter
->reset_reason
=
2720 ENA_REGS_RESET_MISS_TX_CMPL
;
2721 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2725 u64_stats_update_begin(&tx_ring
->syncp
);
2726 tx_ring
->tx_stats
.missed_tx
= missed_tx
;
2727 u64_stats_update_end(&tx_ring
->syncp
);
2732 static void check_for_missing_completions(struct ena_adapter
*adapter
)
2734 struct ena_ring
*tx_ring
;
2735 struct ena_ring
*rx_ring
;
2738 /* Make sure the driver doesn't turn the device in other process */
2741 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2744 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
2747 if (adapter
->missing_tx_completion_to
== ENA_HW_HINTS_NO_TIMEOUT
)
2750 budget
= ENA_MONITORED_TX_QUEUES
;
2752 for (i
= adapter
->last_monitored_tx_qid
; i
< adapter
->num_queues
; i
++) {
2753 tx_ring
= &adapter
->tx_ring
[i
];
2754 rx_ring
= &adapter
->rx_ring
[i
];
2756 rc
= check_missing_comp_in_tx_queue(adapter
, tx_ring
);
2760 rc
= check_for_rx_interrupt_queue(adapter
, rx_ring
);
2769 adapter
->last_monitored_tx_qid
= i
% adapter
->num_queues
;
2772 /* trigger napi schedule after 2 consecutive detections */
2773 #define EMPTY_RX_REFILL 2
2774 /* For the rare case where the device runs out of Rx descriptors and the
2775 * napi handler failed to refill new Rx descriptors (due to a lack of memory
2777 * This case will lead to a deadlock:
2778 * The device won't send interrupts since all the new Rx packets will be dropped
2779 * The napi handler won't allocate new Rx descriptors so the device will be
2780 * able to send new packets.
2782 * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
2783 * It is recommended to have at least 512MB, with a minimum of 128MB for
2784 * constrained environment).
2786 * When such a situation is detected - Reschedule napi
2788 static void check_for_empty_rx_ring(struct ena_adapter
*adapter
)
2790 struct ena_ring
*rx_ring
;
2791 int i
, refill_required
;
2793 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2796 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
2799 for (i
= 0; i
< adapter
->num_queues
; i
++) {
2800 rx_ring
= &adapter
->rx_ring
[i
];
2803 ena_com_sq_empty_space(rx_ring
->ena_com_io_sq
);
2804 if (unlikely(refill_required
== (rx_ring
->ring_size
- 1))) {
2805 rx_ring
->empty_rx_queue
++;
2807 if (rx_ring
->empty_rx_queue
>= EMPTY_RX_REFILL
) {
2808 u64_stats_update_begin(&rx_ring
->syncp
);
2809 rx_ring
->rx_stats
.empty_rx_ring
++;
2810 u64_stats_update_end(&rx_ring
->syncp
);
2812 netif_err(adapter
, drv
, adapter
->netdev
,
2813 "trigger refill for ring %d\n", i
);
2815 napi_schedule(rx_ring
->napi
);
2816 rx_ring
->empty_rx_queue
= 0;
2819 rx_ring
->empty_rx_queue
= 0;
2824 /* Check for keep alive expiration */
2825 static void check_for_missing_keep_alive(struct ena_adapter
*adapter
)
2827 unsigned long keep_alive_expired
;
2829 if (!adapter
->wd_state
)
2832 if (adapter
->keep_alive_timeout
== ENA_HW_HINTS_NO_TIMEOUT
)
2835 keep_alive_expired
= round_jiffies(adapter
->last_keep_alive_jiffies
+
2836 adapter
->keep_alive_timeout
);
2837 if (unlikely(time_is_before_jiffies(keep_alive_expired
))) {
2838 netif_err(adapter
, drv
, adapter
->netdev
,
2839 "Keep alive watchdog timeout.\n");
2840 u64_stats_update_begin(&adapter
->syncp
);
2841 adapter
->dev_stats
.wd_expired
++;
2842 u64_stats_update_end(&adapter
->syncp
);
2843 adapter
->reset_reason
= ENA_REGS_RESET_KEEP_ALIVE_TO
;
2844 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2848 static void check_for_admin_com_state(struct ena_adapter
*adapter
)
2850 if (unlikely(!ena_com_get_admin_running_state(adapter
->ena_dev
))) {
2851 netif_err(adapter
, drv
, adapter
->netdev
,
2852 "ENA admin queue is not in running state!\n");
2853 u64_stats_update_begin(&adapter
->syncp
);
2854 adapter
->dev_stats
.admin_q_pause
++;
2855 u64_stats_update_end(&adapter
->syncp
);
2856 adapter
->reset_reason
= ENA_REGS_RESET_ADMIN_TO
;
2857 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2861 static void ena_update_hints(struct ena_adapter
*adapter
,
2862 struct ena_admin_ena_hw_hints
*hints
)
2864 struct net_device
*netdev
= adapter
->netdev
;
2866 if (hints
->admin_completion_tx_timeout
)
2867 adapter
->ena_dev
->admin_queue
.completion_timeout
=
2868 hints
->admin_completion_tx_timeout
* 1000;
2870 if (hints
->mmio_read_timeout
)
2871 /* convert to usec */
2872 adapter
->ena_dev
->mmio_read
.reg_read_to
=
2873 hints
->mmio_read_timeout
* 1000;
2875 if (hints
->missed_tx_completion_count_threshold_to_reset
)
2876 adapter
->missing_tx_completion_threshold
=
2877 hints
->missed_tx_completion_count_threshold_to_reset
;
2879 if (hints
->missing_tx_completion_timeout
) {
2880 if (hints
->missing_tx_completion_timeout
== ENA_HW_HINTS_NO_TIMEOUT
)
2881 adapter
->missing_tx_completion_to
= ENA_HW_HINTS_NO_TIMEOUT
;
2883 adapter
->missing_tx_completion_to
=
2884 msecs_to_jiffies(hints
->missing_tx_completion_timeout
);
2887 if (hints
->netdev_wd_timeout
)
2888 netdev
->watchdog_timeo
= msecs_to_jiffies(hints
->netdev_wd_timeout
);
2890 if (hints
->driver_watchdog_timeout
) {
2891 if (hints
->driver_watchdog_timeout
== ENA_HW_HINTS_NO_TIMEOUT
)
2892 adapter
->keep_alive_timeout
= ENA_HW_HINTS_NO_TIMEOUT
;
2894 adapter
->keep_alive_timeout
=
2895 msecs_to_jiffies(hints
->driver_watchdog_timeout
);
2899 static void ena_update_host_info(struct ena_admin_host_info
*host_info
,
2900 struct net_device
*netdev
)
2902 host_info
->supported_network_features
[0] =
2903 netdev
->features
& GENMASK_ULL(31, 0);
2904 host_info
->supported_network_features
[1] =
2905 (netdev
->features
& GENMASK_ULL(63, 32)) >> 32;
2908 static void ena_timer_service(struct timer_list
*t
)
2910 struct ena_adapter
*adapter
= from_timer(adapter
, t
, timer_service
);
2911 u8
*debug_area
= adapter
->ena_dev
->host_attr
.debug_area_virt_addr
;
2912 struct ena_admin_host_info
*host_info
=
2913 adapter
->ena_dev
->host_attr
.host_info
;
2915 check_for_missing_keep_alive(adapter
);
2917 check_for_admin_com_state(adapter
);
2919 check_for_missing_completions(adapter
);
2921 check_for_empty_rx_ring(adapter
);
2924 ena_dump_stats_to_buf(adapter
, debug_area
);
2927 ena_update_host_info(host_info
, adapter
->netdev
);
2929 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
2930 netif_err(adapter
, drv
, adapter
->netdev
,
2931 "Trigger reset is on\n");
2932 ena_dump_stats_to_dmesg(adapter
);
2933 queue_work(ena_wq
, &adapter
->reset_task
);
2937 /* Reset the timer */
2938 mod_timer(&adapter
->timer_service
, jiffies
+ HZ
);
2941 static int ena_calc_io_queue_num(struct pci_dev
*pdev
,
2942 struct ena_com_dev
*ena_dev
,
2943 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2945 int io_sq_num
, io_queue_num
;
2947 /* In case of LLQ use the llq number in the get feature cmd */
2948 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
2949 io_sq_num
= get_feat_ctx
->max_queues
.max_llq_num
;
2951 if (io_sq_num
== 0) {
2953 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2955 ena_dev
->tx_mem_queue_type
=
2956 ENA_ADMIN_PLACEMENT_POLICY_HOST
;
2957 io_sq_num
= get_feat_ctx
->max_queues
.max_sq_num
;
2960 io_sq_num
= get_feat_ctx
->max_queues
.max_sq_num
;
2963 io_queue_num
= min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES
);
2964 io_queue_num
= min_t(int, io_queue_num
, io_sq_num
);
2965 io_queue_num
= min_t(int, io_queue_num
,
2966 get_feat_ctx
->max_queues
.max_cq_num
);
2967 /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2968 io_queue_num
= min_t(int, io_queue_num
, pci_msix_vec_count(pdev
) - 1);
2969 if (unlikely(!io_queue_num
)) {
2970 dev_err(&pdev
->dev
, "The device doesn't have io queues\n");
2974 return io_queue_num
;
2977 static void ena_set_push_mode(struct pci_dev
*pdev
, struct ena_com_dev
*ena_dev
,
2978 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2982 has_mem_bar
= pci_select_bars(pdev
, IORESOURCE_MEM
) & BIT(ENA_MEM_BAR
);
2984 /* Enable push mode if device supports LLQ */
2985 if (has_mem_bar
&& (get_feat_ctx
->max_queues
.max_llq_num
> 0))
2986 ena_dev
->tx_mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_DEV
;
2988 ena_dev
->tx_mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_HOST
;
2991 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx
*feat
,
2992 struct net_device
*netdev
)
2994 netdev_features_t dev_features
= 0;
2996 /* Set offload features */
2997 if (feat
->offload
.tx
&
2998 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK
)
2999 dev_features
|= NETIF_F_IP_CSUM
;
3001 if (feat
->offload
.tx
&
3002 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK
)
3003 dev_features
|= NETIF_F_IPV6_CSUM
;
3005 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK
)
3006 dev_features
|= NETIF_F_TSO
;
3008 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK
)
3009 dev_features
|= NETIF_F_TSO6
;
3011 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK
)
3012 dev_features
|= NETIF_F_TSO_ECN
;
3014 if (feat
->offload
.rx_supported
&
3015 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK
)
3016 dev_features
|= NETIF_F_RXCSUM
;
3018 if (feat
->offload
.rx_supported
&
3019 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK
)
3020 dev_features
|= NETIF_F_RXCSUM
;
3028 netdev
->hw_features
|= netdev
->features
;
3029 netdev
->vlan_features
|= netdev
->features
;
3032 static void ena_set_conf_feat_params(struct ena_adapter
*adapter
,
3033 struct ena_com_dev_get_features_ctx
*feat
)
3035 struct net_device
*netdev
= adapter
->netdev
;
3037 /* Copy mac address */
3038 if (!is_valid_ether_addr(feat
->dev_attr
.mac_addr
)) {
3039 eth_hw_addr_random(netdev
);
3040 ether_addr_copy(adapter
->mac_addr
, netdev
->dev_addr
);
3042 ether_addr_copy(adapter
->mac_addr
, feat
->dev_attr
.mac_addr
);
3043 ether_addr_copy(netdev
->dev_addr
, adapter
->mac_addr
);
3046 /* Set offload features */
3047 ena_set_dev_offloads(feat
, netdev
);
3049 adapter
->max_mtu
= feat
->dev_attr
.max_mtu
;
3050 netdev
->max_mtu
= adapter
->max_mtu
;
3051 netdev
->min_mtu
= ENA_MIN_MTU
;
3054 static int ena_rss_init_default(struct ena_adapter
*adapter
)
3056 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
3057 struct device
*dev
= &adapter
->pdev
->dev
;
3061 rc
= ena_com_rss_init(ena_dev
, ENA_RX_RSS_TABLE_LOG_SIZE
);
3063 dev_err(dev
, "Cannot init indirect table\n");
3067 for (i
= 0; i
< ENA_RX_RSS_TABLE_SIZE
; i
++) {
3068 val
= ethtool_rxfh_indir_default(i
, adapter
->num_queues
);
3069 rc
= ena_com_indirect_table_fill_entry(ena_dev
, i
,
3070 ENA_IO_RXQ_IDX(val
));
3071 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
3072 dev_err(dev
, "Cannot fill indirect table\n");
3073 goto err_fill_indir
;
3077 rc
= ena_com_fill_hash_function(ena_dev
, ENA_ADMIN_CRC32
, NULL
,
3078 ENA_HASH_KEY_SIZE
, 0xFFFFFFFF);
3079 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
3080 dev_err(dev
, "Cannot fill hash function\n");
3081 goto err_fill_indir
;
3084 rc
= ena_com_set_default_hash_ctrl(ena_dev
);
3085 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
3086 dev_err(dev
, "Cannot fill hash control\n");
3087 goto err_fill_indir
;
3093 ena_com_rss_destroy(ena_dev
);
3099 static void ena_release_bars(struct ena_com_dev
*ena_dev
, struct pci_dev
*pdev
)
3103 if (ena_dev
->mem_bar
)
3104 devm_iounmap(&pdev
->dev
, ena_dev
->mem_bar
);
3106 if (ena_dev
->reg_bar
)
3107 devm_iounmap(&pdev
->dev
, ena_dev
->reg_bar
);
3109 release_bars
= pci_select_bars(pdev
, IORESOURCE_MEM
) & ENA_BAR_MASK
;
3110 pci_release_selected_regions(pdev
, release_bars
);
3113 static int ena_calc_queue_size(struct pci_dev
*pdev
,
3114 struct ena_com_dev
*ena_dev
,
3115 u16
*max_tx_sgl_size
,
3116 u16
*max_rx_sgl_size
,
3117 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
3119 u32 queue_size
= ENA_DEFAULT_RING_SIZE
;
3121 queue_size
= min_t(u32
, queue_size
,
3122 get_feat_ctx
->max_queues
.max_cq_depth
);
3123 queue_size
= min_t(u32
, queue_size
,
3124 get_feat_ctx
->max_queues
.max_sq_depth
);
3126 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
)
3127 queue_size
= min_t(u32
, queue_size
,
3128 get_feat_ctx
->max_queues
.max_llq_depth
);
3130 queue_size
= rounddown_pow_of_two(queue_size
);
3132 if (unlikely(!queue_size
)) {
3133 dev_err(&pdev
->dev
, "Invalid queue size\n");
3137 *max_tx_sgl_size
= min_t(u16
, ENA_PKT_MAX_BUFS
,
3138 get_feat_ctx
->max_queues
.max_packet_tx_descs
);
3139 *max_rx_sgl_size
= min_t(u16
, ENA_PKT_MAX_BUFS
,
3140 get_feat_ctx
->max_queues
.max_packet_rx_descs
);
3145 /* ena_probe - Device Initialization Routine
3146 * @pdev: PCI device information struct
3147 * @ent: entry in ena_pci_tbl
3149 * Returns 0 on success, negative on failure
3151 * ena_probe initializes an adapter identified by a pci_dev structure.
3152 * The OS initialization, configuring of the adapter private structure,
3153 * and a hardware reset occur.
3155 static int ena_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
3157 struct ena_com_dev_get_features_ctx get_feat_ctx
;
3158 static int version_printed
;
3159 struct net_device
*netdev
;
3160 struct ena_adapter
*adapter
;
3161 struct ena_com_dev
*ena_dev
= NULL
;
3162 static int adapters_found
;
3163 int io_queue_num
, bars
, rc
;
3165 u16 tx_sgl_size
= 0;
3166 u16 rx_sgl_size
= 0;
3169 dev_dbg(&pdev
->dev
, "%s\n", __func__
);
3171 if (version_printed
++ == 0)
3172 dev_info(&pdev
->dev
, "%s", version
);
3174 rc
= pci_enable_device_mem(pdev
);
3176 dev_err(&pdev
->dev
, "pci_enable_device_mem() failed!\n");
3180 pci_set_master(pdev
);
3182 ena_dev
= vzalloc(sizeof(*ena_dev
));
3185 goto err_disable_device
;
3188 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
) & ENA_BAR_MASK
;
3189 rc
= pci_request_selected_regions(pdev
, bars
, DRV_MODULE_NAME
);
3191 dev_err(&pdev
->dev
, "pci_request_selected_regions failed %d\n",
3193 goto err_free_ena_dev
;
3196 ena_dev
->reg_bar
= devm_ioremap(&pdev
->dev
,
3197 pci_resource_start(pdev
, ENA_REG_BAR
),
3198 pci_resource_len(pdev
, ENA_REG_BAR
));
3199 if (!ena_dev
->reg_bar
) {
3200 dev_err(&pdev
->dev
, "failed to remap regs bar\n");
3202 goto err_free_region
;
3205 ena_dev
->dmadev
= &pdev
->dev
;
3207 rc
= ena_device_init(ena_dev
, pdev
, &get_feat_ctx
, &wd_state
);
3209 dev_err(&pdev
->dev
, "ena device init failed\n");
3212 goto err_free_region
;
3215 ena_set_push_mode(pdev
, ena_dev
, &get_feat_ctx
);
3217 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
3218 ena_dev
->mem_bar
= devm_ioremap_wc(&pdev
->dev
,
3219 pci_resource_start(pdev
, ENA_MEM_BAR
),
3220 pci_resource_len(pdev
, ENA_MEM_BAR
));
3221 if (!ena_dev
->mem_bar
) {
3223 goto err_device_destroy
;
3227 /* initial Tx interrupt delay, Assumes 1 usec granularity.
3228 * Updated during device initialization with the real granularity
3230 ena_dev
->intr_moder_tx_interval
= ENA_INTR_INITIAL_TX_INTERVAL_USECS
;
3231 io_queue_num
= ena_calc_io_queue_num(pdev
, ena_dev
, &get_feat_ctx
);
3232 queue_size
= ena_calc_queue_size(pdev
, ena_dev
, &tx_sgl_size
,
3233 &rx_sgl_size
, &get_feat_ctx
);
3234 if ((queue_size
<= 0) || (io_queue_num
<= 0)) {
3236 goto err_device_destroy
;
3239 dev_info(&pdev
->dev
, "creating %d io queues. queue size: %d\n",
3240 io_queue_num
, queue_size
);
3242 /* dev zeroed in init_etherdev */
3243 netdev
= alloc_etherdev_mq(sizeof(struct ena_adapter
), io_queue_num
);
3245 dev_err(&pdev
->dev
, "alloc_etherdev_mq failed\n");
3247 goto err_device_destroy
;
3250 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
3252 adapter
= netdev_priv(netdev
);
3253 pci_set_drvdata(pdev
, adapter
);
3255 adapter
->ena_dev
= ena_dev
;
3256 adapter
->netdev
= netdev
;
3257 adapter
->pdev
= pdev
;
3259 ena_set_conf_feat_params(adapter
, &get_feat_ctx
);
3261 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
3262 adapter
->reset_reason
= ENA_REGS_RESET_NORMAL
;
3264 adapter
->tx_ring_size
= queue_size
;
3265 adapter
->rx_ring_size
= queue_size
;
3267 adapter
->max_tx_sgl_size
= tx_sgl_size
;
3268 adapter
->max_rx_sgl_size
= rx_sgl_size
;
3270 adapter
->num_queues
= io_queue_num
;
3271 adapter
->last_monitored_tx_qid
= 0;
3273 adapter
->rx_copybreak
= ENA_DEFAULT_RX_COPYBREAK
;
3274 adapter
->wd_state
= wd_state
;
3276 snprintf(adapter
->name
, ENA_NAME_MAX_LEN
, "ena_%d", adapters_found
);
3278 rc
= ena_com_init_interrupt_moderation(adapter
->ena_dev
);
3281 "Failed to query interrupt moderation feature\n");
3282 goto err_netdev_destroy
;
3284 ena_init_io_rings(adapter
);
3286 netdev
->netdev_ops
= &ena_netdev_ops
;
3287 netdev
->watchdog_timeo
= TX_TIMEOUT
;
3288 ena_set_ethtool_ops(netdev
);
3290 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
3292 u64_stats_init(&adapter
->syncp
);
3294 rc
= ena_enable_msix_and_set_admin_interrupts(adapter
, io_queue_num
);
3297 "Failed to enable and set the admin interrupts\n");
3298 goto err_worker_destroy
;
3300 rc
= ena_rss_init_default(adapter
);
3301 if (rc
&& (rc
!= -EOPNOTSUPP
)) {
3302 dev_err(&pdev
->dev
, "Cannot init RSS rc: %d\n", rc
);
3306 ena_config_debug_area(adapter
);
3308 memcpy(adapter
->netdev
->perm_addr
, adapter
->mac_addr
, netdev
->addr_len
);
3310 netif_carrier_off(netdev
);
3312 rc
= register_netdev(netdev
);
3314 dev_err(&pdev
->dev
, "Cannot register net device\n");
3318 INIT_WORK(&adapter
->reset_task
, ena_fw_reset_device
);
3320 adapter
->last_keep_alive_jiffies
= jiffies
;
3321 adapter
->keep_alive_timeout
= ENA_DEVICE_KALIVE_TIMEOUT
;
3322 adapter
->missing_tx_completion_to
= TX_TIMEOUT
;
3323 adapter
->missing_tx_completion_threshold
= MAX_NUM_OF_TIMEOUTED_PACKETS
;
3325 ena_update_hints(adapter
, &get_feat_ctx
.hw_hints
);
3327 timer_setup(&adapter
->timer_service
, ena_timer_service
, 0);
3328 mod_timer(&adapter
->timer_service
, round_jiffies(jiffies
+ HZ
));
3330 dev_info(&pdev
->dev
, "%s found at mem %lx, mac addr %pM Queues %d\n",
3331 DEVICE_NAME
, (long)pci_resource_start(pdev
, 0),
3332 netdev
->dev_addr
, io_queue_num
);
3334 set_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
3341 ena_com_delete_debug_area(ena_dev
);
3342 ena_com_rss_destroy(ena_dev
);
3344 ena_com_dev_reset(ena_dev
, ENA_REGS_RESET_INIT_ERR
);
3345 ena_free_mgmnt_irq(adapter
);
3346 ena_disable_msix(adapter
);
3348 ena_com_destroy_interrupt_moderation(ena_dev
);
3349 del_timer(&adapter
->timer_service
);
3351 free_netdev(netdev
);
3353 ena_com_delete_host_info(ena_dev
);
3354 ena_com_admin_destroy(ena_dev
);
3356 ena_release_bars(ena_dev
, pdev
);
3360 pci_disable_device(pdev
);
3364 /*****************************************************************************/
3365 static int ena_sriov_configure(struct pci_dev
*dev
, int numvfs
)
3370 rc
= pci_enable_sriov(dev
, numvfs
);
3373 "pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
3382 pci_disable_sriov(dev
);
3389 /*****************************************************************************/
3390 /*****************************************************************************/
3392 /* ena_remove - Device Removal Routine
3393 * @pdev: PCI device information struct
3395 * ena_remove is called by the PCI subsystem to alert the driver
3396 * that it should release a PCI device.
3398 static void ena_remove(struct pci_dev
*pdev
)
3400 struct ena_adapter
*adapter
= pci_get_drvdata(pdev
);
3401 struct ena_com_dev
*ena_dev
;
3402 struct net_device
*netdev
;
3404 ena_dev
= adapter
->ena_dev
;
3405 netdev
= adapter
->netdev
;
3407 #ifdef CONFIG_RFS_ACCEL
3408 if ((adapter
->msix_vecs
>= 1) && (netdev
->rx_cpu_rmap
)) {
3409 free_irq_cpu_rmap(netdev
->rx_cpu_rmap
);
3410 netdev
->rx_cpu_rmap
= NULL
;
3412 #endif /* CONFIG_RFS_ACCEL */
3413 del_timer_sync(&adapter
->timer_service
);
3415 cancel_work_sync(&adapter
->reset_task
);
3417 unregister_netdev(netdev
);
3419 /* If the device is running then we want to make sure the device will be
3420 * reset to make sure no more events will be issued by the device.
3422 if (test_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
))
3423 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
3426 ena_destroy_device(adapter
, true);
3429 free_netdev(netdev
);
3431 ena_com_rss_destroy(ena_dev
);
3433 ena_com_delete_debug_area(ena_dev
);
3435 ena_com_delete_host_info(ena_dev
);
3437 ena_release_bars(ena_dev
, pdev
);
3439 pci_disable_device(pdev
);
3441 ena_com_destroy_interrupt_moderation(ena_dev
);
3447 /* ena_suspend - PM suspend callback
3448 * @pdev: PCI device information struct
3449 * @state:power state
3451 static int ena_suspend(struct pci_dev
*pdev
, pm_message_t state
)
3453 struct ena_adapter
*adapter
= pci_get_drvdata(pdev
);
3455 u64_stats_update_begin(&adapter
->syncp
);
3456 adapter
->dev_stats
.suspend
++;
3457 u64_stats_update_end(&adapter
->syncp
);
3460 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
3462 "ignoring device reset request as the device is being suspended\n");
3463 clear_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
3465 ena_destroy_device(adapter
, true);
3470 /* ena_resume - PM resume callback
3471 * @pdev: PCI device information struct
3474 static int ena_resume(struct pci_dev
*pdev
)
3476 struct ena_adapter
*adapter
= pci_get_drvdata(pdev
);
3479 u64_stats_update_begin(&adapter
->syncp
);
3480 adapter
->dev_stats
.resume
++;
3481 u64_stats_update_end(&adapter
->syncp
);
3484 rc
= ena_restore_device(adapter
);
3490 static struct pci_driver ena_pci_driver
= {
3491 .name
= DRV_MODULE_NAME
,
3492 .id_table
= ena_pci_tbl
,
3494 .remove
= ena_remove
,
3496 .suspend
= ena_suspend
,
3497 .resume
= ena_resume
,
3499 .sriov_configure
= ena_sriov_configure
,
3502 static int __init
ena_init(void)
3504 pr_info("%s", version
);
3506 ena_wq
= create_singlethread_workqueue(DRV_MODULE_NAME
);
3508 pr_err("Failed to create workqueue\n");
3512 return pci_register_driver(&ena_pci_driver
);
3515 static void __exit
ena_cleanup(void)
3517 pci_unregister_driver(&ena_pci_driver
);
3520 destroy_workqueue(ena_wq
);
3525 /******************************************************************************
3526 ******************************** AENQ Handlers *******************************
3527 *****************************************************************************/
3528 /* ena_update_on_link_change:
3529 * Notify the network interface about the change in link status
3531 static void ena_update_on_link_change(void *adapter_data
,
3532 struct ena_admin_aenq_entry
*aenq_e
)
3534 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3535 struct ena_admin_aenq_link_change_desc
*aenq_desc
=
3536 (struct ena_admin_aenq_link_change_desc
*)aenq_e
;
3537 int status
= aenq_desc
->flags
&
3538 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK
;
3541 netdev_dbg(adapter
->netdev
, "%s\n", __func__
);
3542 set_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
);
3543 if (!test_bit(ENA_FLAG_ONGOING_RESET
, &adapter
->flags
))
3544 netif_carrier_on(adapter
->netdev
);
3546 clear_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
);
3547 netif_carrier_off(adapter
->netdev
);
3551 static void ena_keep_alive_wd(void *adapter_data
,
3552 struct ena_admin_aenq_entry
*aenq_e
)
3554 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3555 struct ena_admin_aenq_keep_alive_desc
*desc
;
3558 desc
= (struct ena_admin_aenq_keep_alive_desc
*)aenq_e
;
3559 adapter
->last_keep_alive_jiffies
= jiffies
;
3561 rx_drops
= ((u64
)desc
->rx_drops_high
<< 32) | desc
->rx_drops_low
;
3563 u64_stats_update_begin(&adapter
->syncp
);
3564 adapter
->dev_stats
.rx_drops
= rx_drops
;
3565 u64_stats_update_end(&adapter
->syncp
);
3568 static void ena_notification(void *adapter_data
,
3569 struct ena_admin_aenq_entry
*aenq_e
)
3571 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3572 struct ena_admin_ena_hw_hints
*hints
;
3574 WARN(aenq_e
->aenq_common_desc
.group
!= ENA_ADMIN_NOTIFICATION
,
3575 "Invalid group(%x) expected %x\n",
3576 aenq_e
->aenq_common_desc
.group
,
3577 ENA_ADMIN_NOTIFICATION
);
3579 switch (aenq_e
->aenq_common_desc
.syndrom
) {
3580 case ENA_ADMIN_UPDATE_HINTS
:
3581 hints
= (struct ena_admin_ena_hw_hints
*)
3582 (&aenq_e
->inline_data_w4
);
3583 ena_update_hints(adapter
, hints
);
3586 netif_err(adapter
, drv
, adapter
->netdev
,
3587 "Invalid aenq notification link state %d\n",
3588 aenq_e
->aenq_common_desc
.syndrom
);
3592 /* This handler will called for unknown event group or unimplemented handlers*/
3593 static void unimplemented_aenq_handler(void *data
,
3594 struct ena_admin_aenq_entry
*aenq_e
)
3596 struct ena_adapter
*adapter
= (struct ena_adapter
*)data
;
3598 netif_err(adapter
, drv
, adapter
->netdev
,
3599 "Unknown event was received or event with unimplemented handler\n");
3602 static struct ena_aenq_handlers aenq_handlers
= {
3604 [ENA_ADMIN_LINK_CHANGE
] = ena_update_on_link_change
,
3605 [ENA_ADMIN_NOTIFICATION
] = ena_notification
,
3606 [ENA_ADMIN_KEEP_ALIVE
] = ena_keep_alive_wd
,
3608 .unimplemented_handler
= unimplemented_aenq_handler
3611 module_init(ena_init
);
3612 module_exit(ena_cleanup
);