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
);
79 static void ena_tx_timeout(struct net_device
*dev
)
81 struct ena_adapter
*adapter
= netdev_priv(dev
);
83 /* Change the state of the device to trigger reset
84 * Check that we are not in the middle or a trigger already
87 if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
90 u64_stats_update_begin(&adapter
->syncp
);
91 adapter
->dev_stats
.tx_timeout
++;
92 u64_stats_update_end(&adapter
->syncp
);
94 netif_err(adapter
, tx_err
, dev
, "Transmit time out\n");
97 static void update_rx_ring_mtu(struct ena_adapter
*adapter
, int mtu
)
101 for (i
= 0; i
< adapter
->num_queues
; i
++)
102 adapter
->rx_ring
[i
].mtu
= mtu
;
105 static int ena_change_mtu(struct net_device
*dev
, int new_mtu
)
107 struct ena_adapter
*adapter
= netdev_priv(dev
);
110 ret
= ena_com_set_dev_mtu(adapter
->ena_dev
, new_mtu
);
112 netif_dbg(adapter
, drv
, dev
, "set MTU to %d\n", new_mtu
);
113 update_rx_ring_mtu(adapter
, new_mtu
);
116 netif_err(adapter
, drv
, dev
, "Failed to set MTU to %d\n",
123 static int ena_init_rx_cpu_rmap(struct ena_adapter
*adapter
)
125 #ifdef CONFIG_RFS_ACCEL
129 adapter
->netdev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(adapter
->num_queues
);
130 if (!adapter
->netdev
->rx_cpu_rmap
)
132 for (i
= 0; i
< adapter
->num_queues
; i
++) {
133 int irq_idx
= ENA_IO_IRQ_IDX(i
);
135 rc
= irq_cpu_rmap_add(adapter
->netdev
->rx_cpu_rmap
,
136 pci_irq_vector(adapter
->pdev
, irq_idx
));
138 free_irq_cpu_rmap(adapter
->netdev
->rx_cpu_rmap
);
139 adapter
->netdev
->rx_cpu_rmap
= NULL
;
143 #endif /* CONFIG_RFS_ACCEL */
147 static void ena_init_io_rings_common(struct ena_adapter
*adapter
,
148 struct ena_ring
*ring
, u16 qid
)
151 ring
->pdev
= adapter
->pdev
;
152 ring
->dev
= &adapter
->pdev
->dev
;
153 ring
->netdev
= adapter
->netdev
;
154 ring
->napi
= &adapter
->ena_napi
[qid
].napi
;
155 ring
->adapter
= adapter
;
156 ring
->ena_dev
= adapter
->ena_dev
;
157 ring
->per_napi_packets
= 0;
158 ring
->per_napi_bytes
= 0;
160 u64_stats_init(&ring
->syncp
);
163 static void ena_init_io_rings(struct ena_adapter
*adapter
)
165 struct ena_com_dev
*ena_dev
;
166 struct ena_ring
*txr
, *rxr
;
169 ena_dev
= adapter
->ena_dev
;
171 for (i
= 0; i
< adapter
->num_queues
; i
++) {
172 txr
= &adapter
->tx_ring
[i
];
173 rxr
= &adapter
->rx_ring
[i
];
175 /* TX/RX common ring state */
176 ena_init_io_rings_common(adapter
, txr
, i
);
177 ena_init_io_rings_common(adapter
, rxr
, i
);
179 /* TX specific ring state */
180 txr
->ring_size
= adapter
->tx_ring_size
;
181 txr
->tx_max_header_size
= ena_dev
->tx_max_header_size
;
182 txr
->tx_mem_queue_type
= ena_dev
->tx_mem_queue_type
;
183 txr
->sgl_size
= adapter
->max_tx_sgl_size
;
184 txr
->smoothed_interval
=
185 ena_com_get_nonadaptive_moderation_interval_tx(ena_dev
);
187 /* RX specific ring state */
188 rxr
->ring_size
= adapter
->rx_ring_size
;
189 rxr
->rx_copybreak
= adapter
->rx_copybreak
;
190 rxr
->sgl_size
= adapter
->max_rx_sgl_size
;
191 rxr
->smoothed_interval
=
192 ena_com_get_nonadaptive_moderation_interval_rx(ena_dev
);
193 rxr
->empty_rx_queue
= 0;
197 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
198 * @adapter: network interface device structure
201 * Return 0 on success, negative on failure
203 static int ena_setup_tx_resources(struct ena_adapter
*adapter
, int qid
)
205 struct ena_ring
*tx_ring
= &adapter
->tx_ring
[qid
];
206 struct ena_irq
*ena_irq
= &adapter
->irq_tbl
[ENA_IO_IRQ_IDX(qid
)];
209 if (tx_ring
->tx_buffer_info
) {
210 netif_err(adapter
, ifup
,
211 adapter
->netdev
, "tx_buffer_info info is not NULL");
215 size
= sizeof(struct ena_tx_buffer
) * tx_ring
->ring_size
;
216 node
= cpu_to_node(ena_irq
->cpu
);
218 tx_ring
->tx_buffer_info
= vzalloc_node(size
, node
);
219 if (!tx_ring
->tx_buffer_info
) {
220 tx_ring
->tx_buffer_info
= vzalloc(size
);
221 if (!tx_ring
->tx_buffer_info
)
225 size
= sizeof(u16
) * tx_ring
->ring_size
;
226 tx_ring
->free_tx_ids
= vzalloc_node(size
, node
);
227 if (!tx_ring
->free_tx_ids
) {
228 tx_ring
->free_tx_ids
= vzalloc(size
);
229 if (!tx_ring
->free_tx_ids
) {
230 vfree(tx_ring
->tx_buffer_info
);
235 /* Req id ring for TX out of order completions */
236 for (i
= 0; i
< tx_ring
->ring_size
; i
++)
237 tx_ring
->free_tx_ids
[i
] = i
;
239 /* Reset tx statistics */
240 memset(&tx_ring
->tx_stats
, 0x0, sizeof(tx_ring
->tx_stats
));
242 tx_ring
->next_to_use
= 0;
243 tx_ring
->next_to_clean
= 0;
244 tx_ring
->cpu
= ena_irq
->cpu
;
248 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
249 * @adapter: network interface device structure
252 * Free all transmit software resources
254 static void ena_free_tx_resources(struct ena_adapter
*adapter
, int qid
)
256 struct ena_ring
*tx_ring
= &adapter
->tx_ring
[qid
];
258 vfree(tx_ring
->tx_buffer_info
);
259 tx_ring
->tx_buffer_info
= NULL
;
261 vfree(tx_ring
->free_tx_ids
);
262 tx_ring
->free_tx_ids
= NULL
;
265 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
266 * @adapter: private structure
268 * Return 0 on success, negative on failure
270 static int ena_setup_all_tx_resources(struct ena_adapter
*adapter
)
274 for (i
= 0; i
< adapter
->num_queues
; i
++) {
275 rc
= ena_setup_tx_resources(adapter
, i
);
284 netif_err(adapter
, ifup
, adapter
->netdev
,
285 "Tx queue %d: allocation failed\n", i
);
287 /* rewind the index freeing the rings as we go */
289 ena_free_tx_resources(adapter
, i
);
293 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
294 * @adapter: board private structure
296 * Free all transmit software resources
298 static void ena_free_all_io_tx_resources(struct ena_adapter
*adapter
)
302 for (i
= 0; i
< adapter
->num_queues
; i
++)
303 ena_free_tx_resources(adapter
, i
);
306 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
307 * @adapter: network interface device structure
310 * Returns 0 on success, negative on failure
312 static int ena_setup_rx_resources(struct ena_adapter
*adapter
,
315 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
316 struct ena_irq
*ena_irq
= &adapter
->irq_tbl
[ENA_IO_IRQ_IDX(qid
)];
319 if (rx_ring
->rx_buffer_info
) {
320 netif_err(adapter
, ifup
, adapter
->netdev
,
321 "rx_buffer_info is not NULL");
325 /* alloc extra element so in rx path
326 * we can always prefetch rx_info + 1
328 size
= sizeof(struct ena_rx_buffer
) * (rx_ring
->ring_size
+ 1);
329 node
= cpu_to_node(ena_irq
->cpu
);
331 rx_ring
->rx_buffer_info
= vzalloc_node(size
, node
);
332 if (!rx_ring
->rx_buffer_info
) {
333 rx_ring
->rx_buffer_info
= vzalloc(size
);
334 if (!rx_ring
->rx_buffer_info
)
338 /* Reset rx statistics */
339 memset(&rx_ring
->rx_stats
, 0x0, sizeof(rx_ring
->rx_stats
));
341 rx_ring
->next_to_clean
= 0;
342 rx_ring
->next_to_use
= 0;
343 rx_ring
->cpu
= ena_irq
->cpu
;
348 /* ena_free_rx_resources - Free I/O Rx Resources
349 * @adapter: network interface device structure
352 * Free all receive software resources
354 static void ena_free_rx_resources(struct ena_adapter
*adapter
,
357 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
359 vfree(rx_ring
->rx_buffer_info
);
360 rx_ring
->rx_buffer_info
= NULL
;
363 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
364 * @adapter: board private structure
366 * Return 0 on success, negative on failure
368 static int ena_setup_all_rx_resources(struct ena_adapter
*adapter
)
372 for (i
= 0; i
< adapter
->num_queues
; i
++) {
373 rc
= ena_setup_rx_resources(adapter
, i
);
382 netif_err(adapter
, ifup
, adapter
->netdev
,
383 "Rx queue %d: allocation failed\n", i
);
385 /* rewind the index freeing the rings as we go */
387 ena_free_rx_resources(adapter
, i
);
391 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
392 * @adapter: board private structure
394 * Free all receive software resources
396 static void ena_free_all_io_rx_resources(struct ena_adapter
*adapter
)
400 for (i
= 0; i
< adapter
->num_queues
; i
++)
401 ena_free_rx_resources(adapter
, i
);
404 static inline int ena_alloc_rx_page(struct ena_ring
*rx_ring
,
405 struct ena_rx_buffer
*rx_info
, gfp_t gfp
)
407 struct ena_com_buf
*ena_buf
;
411 /* if previous allocated page is not used */
412 if (unlikely(rx_info
->page
))
415 page
= alloc_page(gfp
);
416 if (unlikely(!page
)) {
417 u64_stats_update_begin(&rx_ring
->syncp
);
418 rx_ring
->rx_stats
.page_alloc_fail
++;
419 u64_stats_update_end(&rx_ring
->syncp
);
423 dma
= dma_map_page(rx_ring
->dev
, page
, 0, PAGE_SIZE
,
425 if (unlikely(dma_mapping_error(rx_ring
->dev
, dma
))) {
426 u64_stats_update_begin(&rx_ring
->syncp
);
427 rx_ring
->rx_stats
.dma_mapping_err
++;
428 u64_stats_update_end(&rx_ring
->syncp
);
433 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
434 "alloc page %p, rx_info %p\n", page
, rx_info
);
436 rx_info
->page
= page
;
437 rx_info
->page_offset
= 0;
438 ena_buf
= &rx_info
->ena_buf
;
439 ena_buf
->paddr
= dma
;
440 ena_buf
->len
= PAGE_SIZE
;
445 static void ena_free_rx_page(struct ena_ring
*rx_ring
,
446 struct ena_rx_buffer
*rx_info
)
448 struct page
*page
= rx_info
->page
;
449 struct ena_com_buf
*ena_buf
= &rx_info
->ena_buf
;
451 if (unlikely(!page
)) {
452 netif_warn(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
453 "Trying to free unallocated buffer\n");
457 dma_unmap_page(rx_ring
->dev
, ena_buf
->paddr
, PAGE_SIZE
,
461 rx_info
->page
= NULL
;
464 static int ena_refill_rx_bufs(struct ena_ring
*rx_ring
, u32 num
)
470 next_to_use
= rx_ring
->next_to_use
;
472 for (i
= 0; i
< num
; i
++) {
473 struct ena_rx_buffer
*rx_info
=
474 &rx_ring
->rx_buffer_info
[next_to_use
];
476 rc
= ena_alloc_rx_page(rx_ring
, rx_info
,
477 __GFP_COLD
| GFP_ATOMIC
| __GFP_COMP
);
478 if (unlikely(rc
< 0)) {
479 netif_warn(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
480 "failed to alloc buffer for rx queue %d\n",
484 rc
= ena_com_add_single_rx_desc(rx_ring
->ena_com_io_sq
,
488 netif_warn(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
489 "failed to add buffer for rx queue %d\n",
493 next_to_use
= ENA_RX_RING_IDX_NEXT(next_to_use
,
497 if (unlikely(i
< num
)) {
498 u64_stats_update_begin(&rx_ring
->syncp
);
499 rx_ring
->rx_stats
.refil_partial
++;
500 u64_stats_update_end(&rx_ring
->syncp
);
501 netdev_warn(rx_ring
->netdev
,
502 "refilled rx qid %d with only %d buffers (from %d)\n",
503 rx_ring
->qid
, i
, num
);
507 /* Add memory barrier to make sure the desc were written before
511 ena_com_write_sq_doorbell(rx_ring
->ena_com_io_sq
);
514 rx_ring
->next_to_use
= next_to_use
;
519 static void ena_free_rx_bufs(struct ena_adapter
*adapter
,
522 struct ena_ring
*rx_ring
= &adapter
->rx_ring
[qid
];
525 for (i
= 0; i
< rx_ring
->ring_size
; i
++) {
526 struct ena_rx_buffer
*rx_info
= &rx_ring
->rx_buffer_info
[i
];
529 ena_free_rx_page(rx_ring
, rx_info
);
533 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
534 * @adapter: board private structure
537 static void ena_refill_all_rx_bufs(struct ena_adapter
*adapter
)
539 struct ena_ring
*rx_ring
;
542 for (i
= 0; i
< adapter
->num_queues
; i
++) {
543 rx_ring
= &adapter
->rx_ring
[i
];
544 bufs_num
= rx_ring
->ring_size
- 1;
545 rc
= ena_refill_rx_bufs(rx_ring
, bufs_num
);
547 if (unlikely(rc
!= bufs_num
))
548 netif_warn(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
549 "refilling Queue %d failed. allocated %d buffers from: %d\n",
554 static void ena_free_all_rx_bufs(struct ena_adapter
*adapter
)
558 for (i
= 0; i
< adapter
->num_queues
; i
++)
559 ena_free_rx_bufs(adapter
, i
);
562 /* ena_free_tx_bufs - Free Tx Buffers per Queue
563 * @tx_ring: TX ring for which buffers be freed
565 static void ena_free_tx_bufs(struct ena_ring
*tx_ring
)
567 bool print_once
= true;
570 for (i
= 0; i
< tx_ring
->ring_size
; i
++) {
571 struct ena_tx_buffer
*tx_info
= &tx_ring
->tx_buffer_info
[i
];
572 struct ena_com_buf
*ena_buf
;
580 netdev_notice(tx_ring
->netdev
,
581 "free uncompleted tx skb qid %d idx 0x%x\n",
585 netdev_dbg(tx_ring
->netdev
,
586 "free uncompleted tx skb qid %d idx 0x%x\n",
590 ena_buf
= tx_info
->bufs
;
591 dma_unmap_single(tx_ring
->dev
,
596 /* unmap remaining mapped pages */
597 nr_frags
= tx_info
->num_of_bufs
- 1;
598 for (j
= 0; j
< nr_frags
; j
++) {
600 dma_unmap_page(tx_ring
->dev
,
606 dev_kfree_skb_any(tx_info
->skb
);
608 netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring
->netdev
,
612 static void ena_free_all_tx_bufs(struct ena_adapter
*adapter
)
614 struct ena_ring
*tx_ring
;
617 for (i
= 0; i
< adapter
->num_queues
; i
++) {
618 tx_ring
= &adapter
->tx_ring
[i
];
619 ena_free_tx_bufs(tx_ring
);
623 static void ena_destroy_all_tx_queues(struct ena_adapter
*adapter
)
628 for (i
= 0; i
< adapter
->num_queues
; i
++) {
629 ena_qid
= ENA_IO_TXQ_IDX(i
);
630 ena_com_destroy_io_queue(adapter
->ena_dev
, ena_qid
);
634 static void ena_destroy_all_rx_queues(struct ena_adapter
*adapter
)
639 for (i
= 0; i
< adapter
->num_queues
; i
++) {
640 ena_qid
= ENA_IO_RXQ_IDX(i
);
641 ena_com_destroy_io_queue(adapter
->ena_dev
, ena_qid
);
645 static void ena_destroy_all_io_queues(struct ena_adapter
*adapter
)
647 ena_destroy_all_tx_queues(adapter
);
648 ena_destroy_all_rx_queues(adapter
);
651 static int validate_tx_req_id(struct ena_ring
*tx_ring
, u16 req_id
)
653 struct ena_tx_buffer
*tx_info
= NULL
;
655 if (likely(req_id
< tx_ring
->ring_size
)) {
656 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
657 if (likely(tx_info
->skb
))
662 netif_err(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
663 "tx_info doesn't have valid skb\n");
665 netif_err(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
666 "Invalid req_id: %hu\n", req_id
);
668 u64_stats_update_begin(&tx_ring
->syncp
);
669 tx_ring
->tx_stats
.bad_req_id
++;
670 u64_stats_update_end(&tx_ring
->syncp
);
672 /* Trigger device reset */
673 set_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
);
677 static int ena_clean_tx_irq(struct ena_ring
*tx_ring
, u32 budget
)
679 struct netdev_queue
*txq
;
688 next_to_clean
= tx_ring
->next_to_clean
;
689 txq
= netdev_get_tx_queue(tx_ring
->netdev
, tx_ring
->qid
);
691 while (tx_pkts
< budget
) {
692 struct ena_tx_buffer
*tx_info
;
694 struct ena_com_buf
*ena_buf
;
697 rc
= ena_com_tx_comp_req_id_get(tx_ring
->ena_com_io_cq
,
702 rc
= validate_tx_req_id(tx_ring
, req_id
);
706 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
709 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
713 tx_info
->last_jiffies
= 0;
715 if (likely(tx_info
->num_of_bufs
!= 0)) {
716 ena_buf
= tx_info
->bufs
;
718 dma_unmap_single(tx_ring
->dev
,
719 dma_unmap_addr(ena_buf
, paddr
),
720 dma_unmap_len(ena_buf
, len
),
723 /* unmap remaining mapped pages */
724 nr_frags
= tx_info
->num_of_bufs
- 1;
725 for (i
= 0; i
< nr_frags
; i
++) {
727 dma_unmap_page(tx_ring
->dev
,
728 dma_unmap_addr(ena_buf
, paddr
),
729 dma_unmap_len(ena_buf
, len
),
734 netif_dbg(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
735 "tx_poll: q %d skb %p completed\n", tx_ring
->qid
,
738 tx_bytes
+= skb
->len
;
741 total_done
+= tx_info
->tx_descs
;
743 tx_ring
->free_tx_ids
[next_to_clean
] = req_id
;
744 next_to_clean
= ENA_TX_RING_IDX_NEXT(next_to_clean
,
748 tx_ring
->next_to_clean
= next_to_clean
;
749 ena_com_comp_ack(tx_ring
->ena_com_io_sq
, total_done
);
750 ena_com_update_dev_comp_head(tx_ring
->ena_com_io_cq
);
752 netdev_tx_completed_queue(txq
, tx_pkts
, tx_bytes
);
754 netif_dbg(tx_ring
->adapter
, tx_done
, tx_ring
->netdev
,
755 "tx_poll: q %d done. total pkts: %d\n",
756 tx_ring
->qid
, tx_pkts
);
758 /* need to make the rings circular update visible to
759 * ena_start_xmit() before checking for netif_queue_stopped().
763 above_thresh
= ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) >
764 ENA_TX_WAKEUP_THRESH
;
765 if (unlikely(netif_tx_queue_stopped(txq
) && above_thresh
)) {
766 __netif_tx_lock(txq
, smp_processor_id());
767 above_thresh
= ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) >
768 ENA_TX_WAKEUP_THRESH
;
769 if (netif_tx_queue_stopped(txq
) && above_thresh
) {
770 netif_tx_wake_queue(txq
);
771 u64_stats_update_begin(&tx_ring
->syncp
);
772 tx_ring
->tx_stats
.queue_wakeup
++;
773 u64_stats_update_end(&tx_ring
->syncp
);
775 __netif_tx_unlock(txq
);
778 tx_ring
->per_napi_bytes
+= tx_bytes
;
779 tx_ring
->per_napi_packets
+= tx_pkts
;
784 static struct sk_buff
*ena_rx_skb(struct ena_ring
*rx_ring
,
785 struct ena_com_rx_buf_info
*ena_bufs
,
790 struct ena_rx_buffer
*rx_info
=
791 &rx_ring
->rx_buffer_info
[*next_to_clean
];
796 len
= ena_bufs
[0].len
;
797 if (unlikely(!rx_info
->page
)) {
798 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
803 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
804 "rx_info %p page %p\n",
805 rx_info
, rx_info
->page
);
807 /* save virt address of first buffer */
808 va
= page_address(rx_info
->page
) + rx_info
->page_offset
;
809 prefetch(va
+ NET_IP_ALIGN
);
811 if (len
<= rx_ring
->rx_copybreak
) {
812 skb
= netdev_alloc_skb_ip_align(rx_ring
->netdev
,
813 rx_ring
->rx_copybreak
);
814 if (unlikely(!skb
)) {
815 u64_stats_update_begin(&rx_ring
->syncp
);
816 rx_ring
->rx_stats
.skb_alloc_fail
++;
817 u64_stats_update_end(&rx_ring
->syncp
);
818 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
819 "Failed to allocate skb\n");
823 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
824 "rx allocated small packet. len %d. data_len %d\n",
825 skb
->len
, skb
->data_len
);
827 /* sync this buffer for CPU use */
828 dma_sync_single_for_cpu(rx_ring
->dev
,
829 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
832 skb_copy_to_linear_data(skb
, va
, len
);
833 dma_sync_single_for_device(rx_ring
->dev
,
834 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
839 skb
->protocol
= eth_type_trans(skb
, rx_ring
->netdev
);
840 *next_to_clean
= ENA_RX_RING_IDX_ADD(*next_to_clean
, descs
,
845 skb
= napi_get_frags(rx_ring
->napi
);
846 if (unlikely(!skb
)) {
847 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
848 "Failed allocating skb\n");
849 u64_stats_update_begin(&rx_ring
->syncp
);
850 rx_ring
->rx_stats
.skb_alloc_fail
++;
851 u64_stats_update_end(&rx_ring
->syncp
);
856 dma_unmap_page(rx_ring
->dev
,
857 dma_unmap_addr(&rx_info
->ena_buf
, paddr
),
858 PAGE_SIZE
, DMA_FROM_DEVICE
);
860 skb_add_rx_frag(skb
, skb_shinfo(skb
)->nr_frags
, rx_info
->page
,
861 rx_info
->page_offset
, len
, PAGE_SIZE
);
863 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
864 "rx skb updated. len %d. data_len %d\n",
865 skb
->len
, skb
->data_len
);
867 rx_info
->page
= NULL
;
869 ENA_RX_RING_IDX_NEXT(*next_to_clean
,
871 if (likely(--descs
== 0))
873 rx_info
= &rx_ring
->rx_buffer_info
[*next_to_clean
];
874 len
= ena_bufs
[++buf
].len
;
880 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
881 * @adapter: structure containing adapter specific data
882 * @ena_rx_ctx: received packet context/metadata
883 * @skb: skb currently being received and modified
885 static inline void ena_rx_checksum(struct ena_ring
*rx_ring
,
886 struct ena_com_rx_ctx
*ena_rx_ctx
,
889 /* Rx csum disabled */
890 if (unlikely(!(rx_ring
->netdev
->features
& NETIF_F_RXCSUM
))) {
891 skb
->ip_summed
= CHECKSUM_NONE
;
895 /* For fragmented packets the checksum isn't valid */
896 if (ena_rx_ctx
->frag
) {
897 skb
->ip_summed
= CHECKSUM_NONE
;
901 /* if IP and error */
902 if (unlikely((ena_rx_ctx
->l3_proto
== ENA_ETH_IO_L3_PROTO_IPV4
) &&
903 (ena_rx_ctx
->l3_csum_err
))) {
904 /* ipv4 checksum error */
905 skb
->ip_summed
= CHECKSUM_NONE
;
906 u64_stats_update_begin(&rx_ring
->syncp
);
907 rx_ring
->rx_stats
.bad_csum
++;
908 u64_stats_update_end(&rx_ring
->syncp
);
909 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
910 "RX IPv4 header checksum error\n");
915 if (likely((ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_TCP
) ||
916 (ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_UDP
))) {
917 if (unlikely(ena_rx_ctx
->l4_csum_err
)) {
918 /* TCP/UDP checksum error */
919 u64_stats_update_begin(&rx_ring
->syncp
);
920 rx_ring
->rx_stats
.bad_csum
++;
921 u64_stats_update_end(&rx_ring
->syncp
);
922 netif_err(rx_ring
->adapter
, rx_err
, rx_ring
->netdev
,
923 "RX L4 checksum error\n");
924 skb
->ip_summed
= CHECKSUM_NONE
;
928 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
932 static void ena_set_rx_hash(struct ena_ring
*rx_ring
,
933 struct ena_com_rx_ctx
*ena_rx_ctx
,
936 enum pkt_hash_types hash_type
;
938 if (likely(rx_ring
->netdev
->features
& NETIF_F_RXHASH
)) {
939 if (likely((ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_TCP
) ||
940 (ena_rx_ctx
->l4_proto
== ENA_ETH_IO_L4_PROTO_UDP
)))
942 hash_type
= PKT_HASH_TYPE_L4
;
944 hash_type
= PKT_HASH_TYPE_NONE
;
946 /* Override hash type if the packet is fragmented */
947 if (ena_rx_ctx
->frag
)
948 hash_type
= PKT_HASH_TYPE_NONE
;
950 skb_set_hash(skb
, ena_rx_ctx
->hash
, hash_type
);
954 /* ena_clean_rx_irq - Cleanup RX irq
955 * @rx_ring: RX ring to clean
956 * @napi: napi handler
957 * @budget: how many packets driver is allowed to clean
959 * Returns the number of cleaned buffers.
961 static int ena_clean_rx_irq(struct ena_ring
*rx_ring
, struct napi_struct
*napi
,
964 u16 next_to_clean
= rx_ring
->next_to_clean
;
965 u32 res_budget
, work_done
;
967 struct ena_com_rx_ctx ena_rx_ctx
;
968 struct ena_adapter
*adapter
;
971 int refill_threshold
;
974 int rx_copybreak_pkt
= 0;
976 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
977 "%s qid %d\n", __func__
, rx_ring
->qid
);
981 ena_rx_ctx
.ena_bufs
= rx_ring
->ena_bufs
;
982 ena_rx_ctx
.max_bufs
= rx_ring
->sgl_size
;
983 ena_rx_ctx
.descs
= 0;
984 rc
= ena_com_rx_pkt(rx_ring
->ena_com_io_cq
,
985 rx_ring
->ena_com_io_sq
,
990 if (unlikely(ena_rx_ctx
.descs
== 0))
993 netif_dbg(rx_ring
->adapter
, rx_status
, rx_ring
->netdev
,
994 "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
995 rx_ring
->qid
, ena_rx_ctx
.descs
, ena_rx_ctx
.l3_proto
,
996 ena_rx_ctx
.l4_proto
, ena_rx_ctx
.hash
);
998 /* allocate skb and fill it */
999 skb
= ena_rx_skb(rx_ring
, rx_ring
->ena_bufs
, ena_rx_ctx
.descs
,
1002 /* exit if we failed to retrieve a buffer */
1003 if (unlikely(!skb
)) {
1004 next_to_clean
= ENA_RX_RING_IDX_ADD(next_to_clean
,
1006 rx_ring
->ring_size
);
1010 ena_rx_checksum(rx_ring
, &ena_rx_ctx
, skb
);
1012 ena_set_rx_hash(rx_ring
, &ena_rx_ctx
, skb
);
1014 skb_record_rx_queue(skb
, rx_ring
->qid
);
1016 if (rx_ring
->ena_bufs
[0].len
<= rx_ring
->rx_copybreak
) {
1017 total_len
+= rx_ring
->ena_bufs
[0].len
;
1019 napi_gro_receive(napi
, skb
);
1021 total_len
+= skb
->len
;
1022 napi_gro_frags(napi
);
1026 } while (likely(res_budget
));
1028 work_done
= budget
- res_budget
;
1029 rx_ring
->per_napi_bytes
+= total_len
;
1030 rx_ring
->per_napi_packets
+= work_done
;
1031 u64_stats_update_begin(&rx_ring
->syncp
);
1032 rx_ring
->rx_stats
.bytes
+= total_len
;
1033 rx_ring
->rx_stats
.cnt
+= work_done
;
1034 rx_ring
->rx_stats
.rx_copybreak_pkt
+= rx_copybreak_pkt
;
1035 u64_stats_update_end(&rx_ring
->syncp
);
1037 rx_ring
->next_to_clean
= next_to_clean
;
1039 refill_required
= ena_com_sq_empty_space(rx_ring
->ena_com_io_sq
);
1040 refill_threshold
= rx_ring
->ring_size
/ ENA_RX_REFILL_THRESH_DIVIDER
;
1042 /* Optimization, try to batch new rx buffers */
1043 if (refill_required
> refill_threshold
) {
1044 ena_com_update_dev_comp_head(rx_ring
->ena_com_io_cq
);
1045 ena_refill_rx_bufs(rx_ring
, refill_required
);
1051 adapter
= netdev_priv(rx_ring
->netdev
);
1053 u64_stats_update_begin(&rx_ring
->syncp
);
1054 rx_ring
->rx_stats
.bad_desc_num
++;
1055 u64_stats_update_end(&rx_ring
->syncp
);
1057 /* Too many desc from the device. Trigger reset */
1058 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
1063 inline void ena_adjust_intr_moderation(struct ena_ring
*rx_ring
,
1064 struct ena_ring
*tx_ring
)
1066 /* We apply adaptive moderation on Rx path only.
1067 * Tx uses static interrupt moderation.
1069 ena_com_calculate_interrupt_delay(rx_ring
->ena_dev
,
1070 rx_ring
->per_napi_packets
,
1071 rx_ring
->per_napi_bytes
,
1072 &rx_ring
->smoothed_interval
,
1073 &rx_ring
->moder_tbl_idx
);
1075 /* Reset per napi packets/bytes */
1076 tx_ring
->per_napi_packets
= 0;
1077 tx_ring
->per_napi_bytes
= 0;
1078 rx_ring
->per_napi_packets
= 0;
1079 rx_ring
->per_napi_bytes
= 0;
1082 static inline void ena_unmask_interrupt(struct ena_ring
*tx_ring
,
1083 struct ena_ring
*rx_ring
)
1085 struct ena_eth_io_intr_reg intr_reg
;
1087 /* Update intr register: rx intr delay,
1088 * tx intr delay and interrupt unmask
1090 ena_com_update_intr_reg(&intr_reg
,
1091 rx_ring
->smoothed_interval
,
1092 tx_ring
->smoothed_interval
,
1095 /* It is a shared MSI-X.
1096 * Tx and Rx CQ have pointer to it.
1097 * So we use one of them to reach the intr reg
1099 ena_com_unmask_intr(rx_ring
->ena_com_io_cq
, &intr_reg
);
1102 static inline void ena_update_ring_numa_node(struct ena_ring
*tx_ring
,
1103 struct ena_ring
*rx_ring
)
1105 int cpu
= get_cpu();
1108 /* Check only one ring since the 2 rings are running on the same cpu */
1109 if (likely(tx_ring
->cpu
== cpu
))
1112 numa_node
= cpu_to_node(cpu
);
1115 if (numa_node
!= NUMA_NO_NODE
) {
1116 ena_com_update_numa_node(tx_ring
->ena_com_io_cq
, numa_node
);
1117 ena_com_update_numa_node(rx_ring
->ena_com_io_cq
, numa_node
);
1128 static int ena_io_poll(struct napi_struct
*napi
, int budget
)
1130 struct ena_napi
*ena_napi
= container_of(napi
, struct ena_napi
, napi
);
1131 struct ena_ring
*tx_ring
, *rx_ring
;
1136 int napi_comp_call
= 0;
1139 tx_ring
= ena_napi
->tx_ring
;
1140 rx_ring
= ena_napi
->rx_ring
;
1142 tx_budget
= tx_ring
->ring_size
/ ENA_TX_POLL_BUDGET_DIVIDER
;
1144 if (!test_bit(ENA_FLAG_DEV_UP
, &tx_ring
->adapter
->flags
) ||
1145 test_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
)) {
1146 napi_complete_done(napi
, 0);
1150 tx_work_done
= ena_clean_tx_irq(tx_ring
, tx_budget
);
1151 rx_work_done
= ena_clean_rx_irq(rx_ring
, napi
, budget
);
1153 /* If the device is about to reset or down, avoid unmask
1154 * the interrupt and return 0 so NAPI won't reschedule
1156 if (unlikely(!test_bit(ENA_FLAG_DEV_UP
, &tx_ring
->adapter
->flags
) ||
1157 test_bit(ENA_FLAG_TRIGGER_RESET
, &tx_ring
->adapter
->flags
))) {
1158 napi_complete_done(napi
, 0);
1161 } else if ((budget
> rx_work_done
) && (tx_budget
> tx_work_done
)) {
1164 /* Update numa and unmask the interrupt only when schedule
1165 * from the interrupt context (vs from sk_busy_loop)
1167 if (napi_complete_done(napi
, rx_work_done
)) {
1168 /* Tx and Rx share the same interrupt vector */
1169 if (ena_com_get_adaptive_moderation_enabled(rx_ring
->ena_dev
))
1170 ena_adjust_intr_moderation(rx_ring
, tx_ring
);
1172 ena_unmask_interrupt(tx_ring
, rx_ring
);
1175 ena_update_ring_numa_node(tx_ring
, rx_ring
);
1182 u64_stats_update_begin(&tx_ring
->syncp
);
1183 tx_ring
->tx_stats
.napi_comp
+= napi_comp_call
;
1184 tx_ring
->tx_stats
.tx_poll
++;
1185 u64_stats_update_end(&tx_ring
->syncp
);
1190 static irqreturn_t
ena_intr_msix_mgmnt(int irq
, void *data
)
1192 struct ena_adapter
*adapter
= (struct ena_adapter
*)data
;
1194 ena_com_admin_q_comp_intr_handler(adapter
->ena_dev
);
1196 /* Don't call the aenq handler before probe is done */
1197 if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
)))
1198 ena_com_aenq_intr_handler(adapter
->ena_dev
, data
);
1203 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1204 * @irq: interrupt number
1205 * @data: pointer to a network interface private napi device structure
1207 static irqreturn_t
ena_intr_msix_io(int irq
, void *data
)
1209 struct ena_napi
*ena_napi
= data
;
1211 napi_schedule(&ena_napi
->napi
);
1216 static int ena_enable_msix(struct ena_adapter
*adapter
, int num_queues
)
1220 /* Reserved the max msix vectors we might need */
1221 msix_vecs
= ENA_MAX_MSIX_VEC(num_queues
);
1223 netif_dbg(adapter
, probe
, adapter
->netdev
,
1224 "trying to enable MSI-X, vectors %d\n", msix_vecs
);
1226 rc
= pci_alloc_irq_vectors(adapter
->pdev
, msix_vecs
, msix_vecs
,
1229 netif_err(adapter
, probe
, adapter
->netdev
,
1230 "Failed to enable MSI-X, vectors %d rc %d\n",
1235 netif_dbg(adapter
, probe
, adapter
->netdev
, "enable MSI-X, vectors %d\n",
1238 if (msix_vecs
>= 1) {
1239 if (ena_init_rx_cpu_rmap(adapter
))
1240 netif_warn(adapter
, probe
, adapter
->netdev
,
1241 "Failed to map IRQs to CPUs\n");
1244 adapter
->msix_vecs
= msix_vecs
;
1249 static void ena_setup_mgmnt_intr(struct ena_adapter
*adapter
)
1253 snprintf(adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].name
,
1254 ENA_IRQNAME_SIZE
, "ena-mgmnt@pci:%s",
1255 pci_name(adapter
->pdev
));
1256 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].handler
=
1257 ena_intr_msix_mgmnt
;
1258 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].data
= adapter
;
1259 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].vector
=
1260 pci_irq_vector(adapter
->pdev
, ENA_MGMNT_IRQ_IDX
);
1261 cpu
= cpumask_first(cpu_online_mask
);
1262 adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].cpu
= cpu
;
1263 cpumask_set_cpu(cpu
,
1264 &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
].affinity_hint_mask
);
1267 static void ena_setup_io_intr(struct ena_adapter
*adapter
)
1269 struct net_device
*netdev
;
1270 int irq_idx
, i
, cpu
;
1272 netdev
= adapter
->netdev
;
1274 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1275 irq_idx
= ENA_IO_IRQ_IDX(i
);
1276 cpu
= i
% num_online_cpus();
1278 snprintf(adapter
->irq_tbl
[irq_idx
].name
, ENA_IRQNAME_SIZE
,
1279 "%s-Tx-Rx-%d", netdev
->name
, i
);
1280 adapter
->irq_tbl
[irq_idx
].handler
= ena_intr_msix_io
;
1281 adapter
->irq_tbl
[irq_idx
].data
= &adapter
->ena_napi
[i
];
1282 adapter
->irq_tbl
[irq_idx
].vector
=
1283 pci_irq_vector(adapter
->pdev
, irq_idx
);
1284 adapter
->irq_tbl
[irq_idx
].cpu
= cpu
;
1286 cpumask_set_cpu(cpu
,
1287 &adapter
->irq_tbl
[irq_idx
].affinity_hint_mask
);
1291 static int ena_request_mgmnt_irq(struct ena_adapter
*adapter
)
1293 unsigned long flags
= 0;
1294 struct ena_irq
*irq
;
1297 irq
= &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
];
1298 rc
= request_irq(irq
->vector
, irq
->handler
, flags
, irq
->name
,
1301 netif_err(adapter
, probe
, adapter
->netdev
,
1302 "failed to request admin irq\n");
1306 netif_dbg(adapter
, probe
, adapter
->netdev
,
1307 "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1308 irq
->affinity_hint_mask
.bits
[0], irq
->vector
);
1310 irq_set_affinity_hint(irq
->vector
, &irq
->affinity_hint_mask
);
1315 static int ena_request_io_irq(struct ena_adapter
*adapter
)
1317 unsigned long flags
= 0;
1318 struct ena_irq
*irq
;
1321 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++) {
1322 irq
= &adapter
->irq_tbl
[i
];
1323 rc
= request_irq(irq
->vector
, irq
->handler
, flags
, irq
->name
,
1326 netif_err(adapter
, ifup
, adapter
->netdev
,
1327 "Failed to request I/O IRQ. index %d rc %d\n",
1332 netif_dbg(adapter
, ifup
, adapter
->netdev
,
1333 "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1334 i
, irq
->affinity_hint_mask
.bits
[0], irq
->vector
);
1336 irq_set_affinity_hint(irq
->vector
, &irq
->affinity_hint_mask
);
1342 for (k
= ENA_IO_IRQ_FIRST_IDX
; k
< i
; k
++) {
1343 irq
= &adapter
->irq_tbl
[k
];
1344 free_irq(irq
->vector
, irq
->data
);
1350 static void ena_free_mgmnt_irq(struct ena_adapter
*adapter
)
1352 struct ena_irq
*irq
;
1354 irq
= &adapter
->irq_tbl
[ENA_MGMNT_IRQ_IDX
];
1355 synchronize_irq(irq
->vector
);
1356 irq_set_affinity_hint(irq
->vector
, NULL
);
1357 free_irq(irq
->vector
, irq
->data
);
1360 static void ena_free_io_irq(struct ena_adapter
*adapter
)
1362 struct ena_irq
*irq
;
1365 #ifdef CONFIG_RFS_ACCEL
1366 if (adapter
->msix_vecs
>= 1) {
1367 free_irq_cpu_rmap(adapter
->netdev
->rx_cpu_rmap
);
1368 adapter
->netdev
->rx_cpu_rmap
= NULL
;
1370 #endif /* CONFIG_RFS_ACCEL */
1372 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++) {
1373 irq
= &adapter
->irq_tbl
[i
];
1374 irq_set_affinity_hint(irq
->vector
, NULL
);
1375 free_irq(irq
->vector
, irq
->data
);
1379 static void ena_disable_io_intr_sync(struct ena_adapter
*adapter
)
1383 if (!netif_running(adapter
->netdev
))
1386 for (i
= ENA_IO_IRQ_FIRST_IDX
; i
< adapter
->msix_vecs
; i
++)
1387 synchronize_irq(adapter
->irq_tbl
[i
].vector
);
1390 static void ena_del_napi(struct ena_adapter
*adapter
)
1394 for (i
= 0; i
< adapter
->num_queues
; i
++)
1395 netif_napi_del(&adapter
->ena_napi
[i
].napi
);
1398 static void ena_init_napi(struct ena_adapter
*adapter
)
1400 struct ena_napi
*napi
;
1403 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1404 napi
= &adapter
->ena_napi
[i
];
1406 netif_napi_add(adapter
->netdev
,
1407 &adapter
->ena_napi
[i
].napi
,
1410 napi
->rx_ring
= &adapter
->rx_ring
[i
];
1411 napi
->tx_ring
= &adapter
->tx_ring
[i
];
1416 static void ena_napi_disable_all(struct ena_adapter
*adapter
)
1420 for (i
= 0; i
< adapter
->num_queues
; i
++)
1421 napi_disable(&adapter
->ena_napi
[i
].napi
);
1424 static void ena_napi_enable_all(struct ena_adapter
*adapter
)
1428 for (i
= 0; i
< adapter
->num_queues
; i
++)
1429 napi_enable(&adapter
->ena_napi
[i
].napi
);
1432 static void ena_restore_ethtool_params(struct ena_adapter
*adapter
)
1434 adapter
->tx_usecs
= 0;
1435 adapter
->rx_usecs
= 0;
1436 adapter
->tx_frames
= 1;
1437 adapter
->rx_frames
= 1;
1440 /* Configure the Rx forwarding */
1441 static int ena_rss_configure(struct ena_adapter
*adapter
)
1443 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1446 /* In case the RSS table wasn't initialized by probe */
1447 if (!ena_dev
->rss
.tbl_log_size
) {
1448 rc
= ena_rss_init_default(adapter
);
1449 if (rc
&& (rc
!= -EOPNOTSUPP
)) {
1450 netif_err(adapter
, ifup
, adapter
->netdev
,
1451 "Failed to init RSS rc: %d\n", rc
);
1456 /* Set indirect table */
1457 rc
= ena_com_indirect_table_set(ena_dev
);
1458 if (unlikely(rc
&& rc
!= -EOPNOTSUPP
))
1461 /* Configure hash function (if supported) */
1462 rc
= ena_com_set_hash_function(ena_dev
);
1463 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
)))
1466 /* Configure hash inputs (if supported) */
1467 rc
= ena_com_set_hash_ctrl(ena_dev
);
1468 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
)))
1474 static int ena_up_complete(struct ena_adapter
*adapter
)
1478 rc
= ena_rss_configure(adapter
);
1482 ena_init_napi(adapter
);
1484 ena_change_mtu(adapter
->netdev
, adapter
->netdev
->mtu
);
1486 ena_refill_all_rx_bufs(adapter
);
1488 /* enable transmits */
1489 netif_tx_start_all_queues(adapter
->netdev
);
1491 ena_restore_ethtool_params(adapter
);
1493 ena_napi_enable_all(adapter
);
1495 /* Enable completion queues interrupt */
1496 for (i
= 0; i
< adapter
->num_queues
; i
++)
1497 ena_unmask_interrupt(&adapter
->tx_ring
[i
],
1498 &adapter
->rx_ring
[i
]);
1500 /* schedule napi in case we had pending packets
1501 * from the last time we disable napi
1503 for (i
= 0; i
< adapter
->num_queues
; i
++)
1504 napi_schedule(&adapter
->ena_napi
[i
].napi
);
1509 static int ena_create_io_tx_queue(struct ena_adapter
*adapter
, int qid
)
1511 struct ena_com_create_io_ctx ctx
= { 0 };
1512 struct ena_com_dev
*ena_dev
;
1513 struct ena_ring
*tx_ring
;
1518 ena_dev
= adapter
->ena_dev
;
1520 tx_ring
= &adapter
->tx_ring
[qid
];
1521 msix_vector
= ENA_IO_IRQ_IDX(qid
);
1522 ena_qid
= ENA_IO_TXQ_IDX(qid
);
1524 ctx
.direction
= ENA_COM_IO_QUEUE_DIRECTION_TX
;
1526 ctx
.mem_queue_type
= ena_dev
->tx_mem_queue_type
;
1527 ctx
.msix_vector
= msix_vector
;
1528 ctx
.queue_size
= adapter
->tx_ring_size
;
1529 ctx
.numa_node
= cpu_to_node(tx_ring
->cpu
);
1531 rc
= ena_com_create_io_queue(ena_dev
, &ctx
);
1533 netif_err(adapter
, ifup
, adapter
->netdev
,
1534 "Failed to create I/O TX queue num %d rc: %d\n",
1539 rc
= ena_com_get_io_handlers(ena_dev
, ena_qid
,
1540 &tx_ring
->ena_com_io_sq
,
1541 &tx_ring
->ena_com_io_cq
);
1543 netif_err(adapter
, ifup
, adapter
->netdev
,
1544 "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1546 ena_com_destroy_io_queue(ena_dev
, ena_qid
);
1550 ena_com_update_numa_node(tx_ring
->ena_com_io_cq
, ctx
.numa_node
);
1554 static int ena_create_all_io_tx_queues(struct ena_adapter
*adapter
)
1556 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1559 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1560 rc
= ena_create_io_tx_queue(adapter
, i
);
1569 ena_com_destroy_io_queue(ena_dev
, ENA_IO_TXQ_IDX(i
));
1574 static int ena_create_io_rx_queue(struct ena_adapter
*adapter
, int qid
)
1576 struct ena_com_dev
*ena_dev
;
1577 struct ena_com_create_io_ctx ctx
= { 0 };
1578 struct ena_ring
*rx_ring
;
1583 ena_dev
= adapter
->ena_dev
;
1585 rx_ring
= &adapter
->rx_ring
[qid
];
1586 msix_vector
= ENA_IO_IRQ_IDX(qid
);
1587 ena_qid
= ENA_IO_RXQ_IDX(qid
);
1590 ctx
.direction
= ENA_COM_IO_QUEUE_DIRECTION_RX
;
1591 ctx
.mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_HOST
;
1592 ctx
.msix_vector
= msix_vector
;
1593 ctx
.queue_size
= adapter
->rx_ring_size
;
1594 ctx
.numa_node
= cpu_to_node(rx_ring
->cpu
);
1596 rc
= ena_com_create_io_queue(ena_dev
, &ctx
);
1598 netif_err(adapter
, ifup
, adapter
->netdev
,
1599 "Failed to create I/O RX queue num %d rc: %d\n",
1604 rc
= ena_com_get_io_handlers(ena_dev
, ena_qid
,
1605 &rx_ring
->ena_com_io_sq
,
1606 &rx_ring
->ena_com_io_cq
);
1608 netif_err(adapter
, ifup
, adapter
->netdev
,
1609 "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1611 ena_com_destroy_io_queue(ena_dev
, ena_qid
);
1615 ena_com_update_numa_node(rx_ring
->ena_com_io_cq
, ctx
.numa_node
);
1620 static int ena_create_all_io_rx_queues(struct ena_adapter
*adapter
)
1622 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
1625 for (i
= 0; i
< adapter
->num_queues
; i
++) {
1626 rc
= ena_create_io_rx_queue(adapter
, i
);
1635 ena_com_destroy_io_queue(ena_dev
, ENA_IO_RXQ_IDX(i
));
1640 static int ena_up(struct ena_adapter
*adapter
)
1644 netdev_dbg(adapter
->netdev
, "%s\n", __func__
);
1646 ena_setup_io_intr(adapter
);
1648 rc
= ena_request_io_irq(adapter
);
1652 /* allocate transmit descriptors */
1653 rc
= ena_setup_all_tx_resources(adapter
);
1657 /* allocate receive descriptors */
1658 rc
= ena_setup_all_rx_resources(adapter
);
1662 /* Create TX queues */
1663 rc
= ena_create_all_io_tx_queues(adapter
);
1665 goto err_create_tx_queues
;
1667 /* Create RX queues */
1668 rc
= ena_create_all_io_rx_queues(adapter
);
1670 goto err_create_rx_queues
;
1672 rc
= ena_up_complete(adapter
);
1676 if (test_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
))
1677 netif_carrier_on(adapter
->netdev
);
1679 u64_stats_update_begin(&adapter
->syncp
);
1680 adapter
->dev_stats
.interface_up
++;
1681 u64_stats_update_end(&adapter
->syncp
);
1683 set_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
1688 ena_destroy_all_rx_queues(adapter
);
1689 err_create_rx_queues
:
1690 ena_destroy_all_tx_queues(adapter
);
1691 err_create_tx_queues
:
1692 ena_free_all_io_rx_resources(adapter
);
1694 ena_free_all_io_tx_resources(adapter
);
1696 ena_free_io_irq(adapter
);
1702 static void ena_down(struct ena_adapter
*adapter
)
1704 netif_info(adapter
, ifdown
, adapter
->netdev
, "%s\n", __func__
);
1706 clear_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
1708 u64_stats_update_begin(&adapter
->syncp
);
1709 adapter
->dev_stats
.interface_down
++;
1710 u64_stats_update_end(&adapter
->syncp
);
1712 netif_carrier_off(adapter
->netdev
);
1713 netif_tx_disable(adapter
->netdev
);
1715 /* After this point the napi handler won't enable the tx queue */
1716 ena_napi_disable_all(adapter
);
1718 /* After destroy the queue there won't be any new interrupts */
1720 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
)) {
1723 rc
= ena_com_dev_reset(adapter
->ena_dev
);
1725 dev_err(&adapter
->pdev
->dev
, "Device reset failed\n");
1728 ena_destroy_all_io_queues(adapter
);
1730 ena_disable_io_intr_sync(adapter
);
1731 ena_free_io_irq(adapter
);
1732 ena_del_napi(adapter
);
1734 ena_free_all_tx_bufs(adapter
);
1735 ena_free_all_rx_bufs(adapter
);
1736 ena_free_all_io_tx_resources(adapter
);
1737 ena_free_all_io_rx_resources(adapter
);
1740 /* ena_open - Called when a network interface is made active
1741 * @netdev: network interface device structure
1743 * Returns 0 on success, negative value on failure
1745 * The open entry point is called when a network interface is made
1746 * active by the system (IFF_UP). At this point all resources needed
1747 * for transmit and receive operations are allocated, the interrupt
1748 * handler is registered with the OS, the watchdog timer is started,
1749 * and the stack is notified that the interface is ready.
1751 static int ena_open(struct net_device
*netdev
)
1753 struct ena_adapter
*adapter
= netdev_priv(netdev
);
1756 /* Notify the stack of the actual queue counts. */
1757 rc
= netif_set_real_num_tx_queues(netdev
, adapter
->num_queues
);
1759 netif_err(adapter
, ifup
, netdev
, "Can't set num tx queues\n");
1763 rc
= netif_set_real_num_rx_queues(netdev
, adapter
->num_queues
);
1765 netif_err(adapter
, ifup
, netdev
, "Can't set num rx queues\n");
1769 rc
= ena_up(adapter
);
1776 /* ena_close - Disables a network interface
1777 * @netdev: network interface device structure
1779 * Returns 0, this is not allowed to fail
1781 * The close entry point is called when an interface is de-activated
1782 * by the OS. The hardware is still under the drivers control, but
1783 * needs to be disabled. A global MAC reset is issued to stop the
1784 * hardware, and all transmit and receive resources are freed.
1786 static int ena_close(struct net_device
*netdev
)
1788 struct ena_adapter
*adapter
= netdev_priv(netdev
);
1790 netif_dbg(adapter
, ifdown
, netdev
, "%s\n", __func__
);
1792 if (test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
1798 static void ena_tx_csum(struct ena_com_tx_ctx
*ena_tx_ctx
, struct sk_buff
*skb
)
1800 u32 mss
= skb_shinfo(skb
)->gso_size
;
1801 struct ena_com_tx_meta
*ena_meta
= &ena_tx_ctx
->ena_meta
;
1804 if ((skb
->ip_summed
== CHECKSUM_PARTIAL
) || mss
) {
1805 ena_tx_ctx
->l4_csum_enable
= 1;
1807 ena_tx_ctx
->tso_enable
= 1;
1808 ena_meta
->l4_hdr_len
= tcp_hdr(skb
)->doff
;
1809 ena_tx_ctx
->l4_csum_partial
= 0;
1811 ena_tx_ctx
->tso_enable
= 0;
1812 ena_meta
->l4_hdr_len
= 0;
1813 ena_tx_ctx
->l4_csum_partial
= 1;
1816 switch (ip_hdr(skb
)->version
) {
1818 ena_tx_ctx
->l3_proto
= ENA_ETH_IO_L3_PROTO_IPV4
;
1819 if (ip_hdr(skb
)->frag_off
& htons(IP_DF
))
1822 ena_tx_ctx
->l3_csum_enable
= 1;
1823 l4_protocol
= ip_hdr(skb
)->protocol
;
1826 ena_tx_ctx
->l3_proto
= ENA_ETH_IO_L3_PROTO_IPV6
;
1827 l4_protocol
= ipv6_hdr(skb
)->nexthdr
;
1833 if (l4_protocol
== IPPROTO_TCP
)
1834 ena_tx_ctx
->l4_proto
= ENA_ETH_IO_L4_PROTO_TCP
;
1836 ena_tx_ctx
->l4_proto
= ENA_ETH_IO_L4_PROTO_UDP
;
1838 ena_meta
->mss
= mss
;
1839 ena_meta
->l3_hdr_len
= skb_network_header_len(skb
);
1840 ena_meta
->l3_hdr_offset
= skb_network_offset(skb
);
1841 ena_tx_ctx
->meta_valid
= 1;
1844 ena_tx_ctx
->meta_valid
= 0;
1848 static int ena_check_and_linearize_skb(struct ena_ring
*tx_ring
,
1849 struct sk_buff
*skb
)
1851 int num_frags
, header_len
, rc
;
1853 num_frags
= skb_shinfo(skb
)->nr_frags
;
1854 header_len
= skb_headlen(skb
);
1856 if (num_frags
< tx_ring
->sgl_size
)
1859 if ((num_frags
== tx_ring
->sgl_size
) &&
1860 (header_len
< tx_ring
->tx_max_header_size
))
1863 u64_stats_update_begin(&tx_ring
->syncp
);
1864 tx_ring
->tx_stats
.linearize
++;
1865 u64_stats_update_end(&tx_ring
->syncp
);
1867 rc
= skb_linearize(skb
);
1869 u64_stats_update_begin(&tx_ring
->syncp
);
1870 tx_ring
->tx_stats
.linearize_failed
++;
1871 u64_stats_update_end(&tx_ring
->syncp
);
1877 /* Called with netif_tx_lock. */
1878 static netdev_tx_t
ena_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1880 struct ena_adapter
*adapter
= netdev_priv(dev
);
1881 struct ena_tx_buffer
*tx_info
;
1882 struct ena_com_tx_ctx ena_tx_ctx
;
1883 struct ena_ring
*tx_ring
;
1884 struct netdev_queue
*txq
;
1885 struct ena_com_buf
*ena_buf
;
1893 int qid
, rc
, nb_hw_desc
;
1896 netif_dbg(adapter
, tx_queued
, dev
, "%s skb %p\n", __func__
, skb
);
1897 /* Determine which tx ring we will be placed on */
1898 qid
= skb_get_queue_mapping(skb
);
1899 tx_ring
= &adapter
->tx_ring
[qid
];
1900 txq
= netdev_get_tx_queue(dev
, qid
);
1902 rc
= ena_check_and_linearize_skb(tx_ring
, skb
);
1904 goto error_drop_packet
;
1906 skb_tx_timestamp(skb
);
1907 len
= skb_headlen(skb
);
1909 next_to_use
= tx_ring
->next_to_use
;
1910 req_id
= tx_ring
->free_tx_ids
[next_to_use
];
1911 tx_info
= &tx_ring
->tx_buffer_info
[req_id
];
1912 tx_info
->num_of_bufs
= 0;
1914 WARN(tx_info
->skb
, "SKB isn't NULL req_id %d\n", req_id
);
1915 ena_buf
= tx_info
->bufs
;
1918 if (tx_ring
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
1919 /* prepared the push buffer */
1920 push_len
= min_t(u32
, len
, tx_ring
->tx_max_header_size
);
1921 header_len
= push_len
;
1922 push_hdr
= skb
->data
;
1925 header_len
= min_t(u32
, len
, tx_ring
->tx_max_header_size
);
1929 netif_dbg(adapter
, tx_queued
, dev
,
1930 "skb: %p header_buf->vaddr: %p push_len: %d\n", skb
,
1931 push_hdr
, push_len
);
1933 if (len
> push_len
) {
1934 dma
= dma_map_single(tx_ring
->dev
, skb
->data
+ push_len
,
1935 len
- push_len
, DMA_TO_DEVICE
);
1936 if (dma_mapping_error(tx_ring
->dev
, dma
))
1937 goto error_report_dma_error
;
1939 ena_buf
->paddr
= dma
;
1940 ena_buf
->len
= len
- push_len
;
1943 tx_info
->num_of_bufs
++;
1946 last_frag
= skb_shinfo(skb
)->nr_frags
;
1948 for (i
= 0; i
< last_frag
; i
++) {
1949 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
1951 len
= skb_frag_size(frag
);
1952 dma
= skb_frag_dma_map(tx_ring
->dev
, frag
, 0, len
,
1954 if (dma_mapping_error(tx_ring
->dev
, dma
))
1955 goto error_report_dma_error
;
1957 ena_buf
->paddr
= dma
;
1962 tx_info
->num_of_bufs
+= last_frag
;
1964 memset(&ena_tx_ctx
, 0x0, sizeof(struct ena_com_tx_ctx
));
1965 ena_tx_ctx
.ena_bufs
= tx_info
->bufs
;
1966 ena_tx_ctx
.push_header
= push_hdr
;
1967 ena_tx_ctx
.num_bufs
= tx_info
->num_of_bufs
;
1968 ena_tx_ctx
.req_id
= req_id
;
1969 ena_tx_ctx
.header_len
= header_len
;
1971 /* set flags and meta data */
1972 ena_tx_csum(&ena_tx_ctx
, skb
);
1974 /* prepare the packet's descriptors to dma engine */
1975 rc
= ena_com_prepare_tx(tx_ring
->ena_com_io_sq
, &ena_tx_ctx
,
1979 netif_err(adapter
, tx_queued
, dev
,
1980 "failed to prepare tx bufs\n");
1981 u64_stats_update_begin(&tx_ring
->syncp
);
1982 tx_ring
->tx_stats
.queue_stop
++;
1983 tx_ring
->tx_stats
.prepare_ctx_err
++;
1984 u64_stats_update_end(&tx_ring
->syncp
);
1985 netif_tx_stop_queue(txq
);
1986 goto error_unmap_dma
;
1989 netdev_tx_sent_queue(txq
, skb
->len
);
1991 u64_stats_update_begin(&tx_ring
->syncp
);
1992 tx_ring
->tx_stats
.cnt
++;
1993 tx_ring
->tx_stats
.bytes
+= skb
->len
;
1994 u64_stats_update_end(&tx_ring
->syncp
);
1996 tx_info
->tx_descs
= nb_hw_desc
;
1997 tx_info
->last_jiffies
= jiffies
;
1998 tx_info
->print_once
= 0;
2000 tx_ring
->next_to_use
= ENA_TX_RING_IDX_NEXT(next_to_use
,
2001 tx_ring
->ring_size
);
2003 /* This WMB is aimed to:
2004 * 1 - perform smp barrier before reading next_to_completion
2005 * 2 - make sure the desc were written before trigger DB
2009 /* stop the queue when no more space available, the packet can have up
2010 * to sgl_size + 2. one for the meta descriptor and one for header
2011 * (if the header is larger than tx_max_header_size).
2013 if (unlikely(ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
) <
2014 (tx_ring
->sgl_size
+ 2))) {
2015 netif_dbg(adapter
, tx_queued
, dev
, "%s stop queue %d\n",
2018 netif_tx_stop_queue(txq
);
2019 u64_stats_update_begin(&tx_ring
->syncp
);
2020 tx_ring
->tx_stats
.queue_stop
++;
2021 u64_stats_update_end(&tx_ring
->syncp
);
2023 /* There is a rare condition where this function decide to
2024 * stop the queue but meanwhile clean_tx_irq updates
2025 * next_to_completion and terminates.
2026 * The queue will remain stopped forever.
2027 * To solve this issue this function perform rmb, check
2028 * the wakeup condition and wake up the queue if needed.
2032 if (ena_com_sq_empty_space(tx_ring
->ena_com_io_sq
)
2033 > ENA_TX_WAKEUP_THRESH
) {
2034 netif_tx_wake_queue(txq
);
2035 u64_stats_update_begin(&tx_ring
->syncp
);
2036 tx_ring
->tx_stats
.queue_wakeup
++;
2037 u64_stats_update_end(&tx_ring
->syncp
);
2041 if (netif_xmit_stopped(txq
) || !skb
->xmit_more
) {
2042 /* trigger the dma engine */
2043 ena_com_write_sq_doorbell(tx_ring
->ena_com_io_sq
);
2044 u64_stats_update_begin(&tx_ring
->syncp
);
2045 tx_ring
->tx_stats
.doorbells
++;
2046 u64_stats_update_end(&tx_ring
->syncp
);
2049 return NETDEV_TX_OK
;
2051 error_report_dma_error
:
2052 u64_stats_update_begin(&tx_ring
->syncp
);
2053 tx_ring
->tx_stats
.dma_mapping_err
++;
2054 u64_stats_update_end(&tx_ring
->syncp
);
2055 netdev_warn(adapter
->netdev
, "failed to map skb\n");
2057 tx_info
->skb
= NULL
;
2061 /* save value of frag that failed */
2064 /* start back at beginning and unmap skb */
2065 tx_info
->skb
= NULL
;
2066 ena_buf
= tx_info
->bufs
;
2067 dma_unmap_single(tx_ring
->dev
, dma_unmap_addr(ena_buf
, paddr
),
2068 dma_unmap_len(ena_buf
, len
), DMA_TO_DEVICE
);
2070 /* unmap remaining mapped pages */
2071 for (i
= 0; i
< last_frag
; i
++) {
2073 dma_unmap_page(tx_ring
->dev
, dma_unmap_addr(ena_buf
, paddr
),
2074 dma_unmap_len(ena_buf
, len
), DMA_TO_DEVICE
);
2081 return NETDEV_TX_OK
;
2084 #ifdef CONFIG_NET_POLL_CONTROLLER
2085 static void ena_netpoll(struct net_device
*netdev
)
2087 struct ena_adapter
*adapter
= netdev_priv(netdev
);
2090 /* Dont schedule NAPI if the driver is in the middle of reset
2091 * or netdev is down.
2094 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
) ||
2095 test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
2098 for (i
= 0; i
< adapter
->num_queues
; i
++)
2099 napi_schedule(&adapter
->ena_napi
[i
].napi
);
2101 #endif /* CONFIG_NET_POLL_CONTROLLER */
2103 static u16
ena_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
2104 void *accel_priv
, select_queue_fallback_t fallback
)
2107 /* we suspect that this is good for in--kernel network services that
2108 * want to loop incoming skb rx to tx in normal user generated traffic,
2109 * most probably we will not get to this
2111 if (skb_rx_queue_recorded(skb
))
2112 qid
= skb_get_rx_queue(skb
);
2114 qid
= fallback(dev
, skb
);
2119 static void ena_config_host_info(struct ena_com_dev
*ena_dev
)
2121 struct ena_admin_host_info
*host_info
;
2124 /* Allocate only the host info */
2125 rc
= ena_com_allocate_host_info(ena_dev
);
2127 pr_err("Cannot allocate host info\n");
2131 host_info
= ena_dev
->host_attr
.host_info
;
2133 host_info
->os_type
= ENA_ADMIN_OS_LINUX
;
2134 host_info
->kernel_ver
= LINUX_VERSION_CODE
;
2135 strncpy(host_info
->kernel_ver_str
, utsname()->version
,
2136 sizeof(host_info
->kernel_ver_str
) - 1);
2137 host_info
->os_dist
= 0;
2138 strncpy(host_info
->os_dist_str
, utsname()->release
,
2139 sizeof(host_info
->os_dist_str
) - 1);
2140 host_info
->driver_version
=
2141 (DRV_MODULE_VER_MAJOR
) |
2142 (DRV_MODULE_VER_MINOR
<< ENA_ADMIN_HOST_INFO_MINOR_SHIFT
) |
2143 (DRV_MODULE_VER_SUBMINOR
<< ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT
);
2145 rc
= ena_com_set_host_attributes(ena_dev
);
2147 if (rc
== -EOPNOTSUPP
)
2148 pr_warn("Cannot set host attributes\n");
2150 pr_err("Cannot set host attributes\n");
2158 ena_com_delete_host_info(ena_dev
);
2161 static void ena_config_debug_area(struct ena_adapter
*adapter
)
2163 u32 debug_area_size
;
2166 ss_count
= ena_get_sset_count(adapter
->netdev
, ETH_SS_STATS
);
2167 if (ss_count
<= 0) {
2168 netif_err(adapter
, drv
, adapter
->netdev
,
2169 "SS count is negative\n");
2173 /* allocate 32 bytes for each string and 64bit for the value */
2174 debug_area_size
= ss_count
* ETH_GSTRING_LEN
+ sizeof(u64
) * ss_count
;
2176 rc
= ena_com_allocate_debug_area(adapter
->ena_dev
, debug_area_size
);
2178 pr_err("Cannot allocate debug area\n");
2182 rc
= ena_com_set_host_attributes(adapter
->ena_dev
);
2184 if (rc
== -EOPNOTSUPP
)
2185 netif_warn(adapter
, drv
, adapter
->netdev
,
2186 "Cannot set host attributes\n");
2188 netif_err(adapter
, drv
, adapter
->netdev
,
2189 "Cannot set host attributes\n");
2195 ena_com_delete_debug_area(adapter
->ena_dev
);
2198 static struct rtnl_link_stats64
*ena_get_stats64(struct net_device
*netdev
,
2199 struct rtnl_link_stats64
*stats
)
2201 struct ena_adapter
*adapter
= netdev_priv(netdev
);
2202 struct ena_ring
*rx_ring
, *tx_ring
;
2207 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2210 for (i
= 0; i
< adapter
->num_queues
; i
++) {
2213 tx_ring
= &adapter
->tx_ring
[i
];
2216 start
= u64_stats_fetch_begin_irq(&tx_ring
->syncp
);
2217 packets
= tx_ring
->tx_stats
.cnt
;
2218 bytes
= tx_ring
->tx_stats
.bytes
;
2219 } while (u64_stats_fetch_retry_irq(&tx_ring
->syncp
, start
));
2221 stats
->tx_packets
+= packets
;
2222 stats
->tx_bytes
+= bytes
;
2224 rx_ring
= &adapter
->rx_ring
[i
];
2227 start
= u64_stats_fetch_begin_irq(&rx_ring
->syncp
);
2228 packets
= rx_ring
->rx_stats
.cnt
;
2229 bytes
= rx_ring
->rx_stats
.bytes
;
2230 } while (u64_stats_fetch_retry_irq(&rx_ring
->syncp
, start
));
2232 stats
->rx_packets
+= packets
;
2233 stats
->rx_bytes
+= bytes
;
2237 start
= u64_stats_fetch_begin_irq(&adapter
->syncp
);
2238 rx_drops
= adapter
->dev_stats
.rx_drops
;
2239 } while (u64_stats_fetch_retry_irq(&adapter
->syncp
, start
));
2241 stats
->rx_dropped
= rx_drops
;
2243 stats
->multicast
= 0;
2244 stats
->collisions
= 0;
2246 stats
->rx_length_errors
= 0;
2247 stats
->rx_crc_errors
= 0;
2248 stats
->rx_frame_errors
= 0;
2249 stats
->rx_fifo_errors
= 0;
2250 stats
->rx_missed_errors
= 0;
2251 stats
->tx_window_errors
= 0;
2253 stats
->rx_errors
= 0;
2254 stats
->tx_errors
= 0;
2259 static const struct net_device_ops ena_netdev_ops
= {
2260 .ndo_open
= ena_open
,
2261 .ndo_stop
= ena_close
,
2262 .ndo_start_xmit
= ena_start_xmit
,
2263 .ndo_select_queue
= ena_select_queue
,
2264 .ndo_get_stats64
= ena_get_stats64
,
2265 .ndo_tx_timeout
= ena_tx_timeout
,
2266 .ndo_change_mtu
= ena_change_mtu
,
2267 .ndo_set_mac_address
= NULL
,
2268 .ndo_validate_addr
= eth_validate_addr
,
2269 #ifdef CONFIG_NET_POLL_CONTROLLER
2270 .ndo_poll_controller
= ena_netpoll
,
2271 #endif /* CONFIG_NET_POLL_CONTROLLER */
2274 static void ena_device_io_suspend(struct work_struct
*work
)
2276 struct ena_adapter
*adapter
=
2277 container_of(work
, struct ena_adapter
, suspend_io_task
);
2278 struct net_device
*netdev
= adapter
->netdev
;
2280 /* ena_napi_disable_all disables only the IO handling.
2281 * We are still subject to AENQ keep alive watchdog.
2283 u64_stats_update_begin(&adapter
->syncp
);
2284 adapter
->dev_stats
.io_suspend
++;
2285 u64_stats_update_begin(&adapter
->syncp
);
2286 ena_napi_disable_all(adapter
);
2287 netif_tx_lock(netdev
);
2288 netif_device_detach(netdev
);
2289 netif_tx_unlock(netdev
);
2292 static void ena_device_io_resume(struct work_struct
*work
)
2294 struct ena_adapter
*adapter
=
2295 container_of(work
, struct ena_adapter
, resume_io_task
);
2296 struct net_device
*netdev
= adapter
->netdev
;
2298 u64_stats_update_begin(&adapter
->syncp
);
2299 adapter
->dev_stats
.io_resume
++;
2300 u64_stats_update_end(&adapter
->syncp
);
2302 netif_device_attach(netdev
);
2303 ena_napi_enable_all(adapter
);
2306 static int ena_device_validate_params(struct ena_adapter
*adapter
,
2307 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2309 struct net_device
*netdev
= adapter
->netdev
;
2312 rc
= ether_addr_equal(get_feat_ctx
->dev_attr
.mac_addr
,
2315 netif_err(adapter
, drv
, netdev
,
2316 "Error, mac address are different\n");
2320 if ((get_feat_ctx
->max_queues
.max_cq_num
< adapter
->num_queues
) ||
2321 (get_feat_ctx
->max_queues
.max_sq_num
< adapter
->num_queues
)) {
2322 netif_err(adapter
, drv
, netdev
,
2323 "Error, device doesn't support enough queues\n");
2327 if (get_feat_ctx
->dev_attr
.max_mtu
< netdev
->mtu
) {
2328 netif_err(adapter
, drv
, netdev
,
2329 "Error, device max mtu is smaller than netdev MTU\n");
2336 static int ena_device_init(struct ena_com_dev
*ena_dev
, struct pci_dev
*pdev
,
2337 struct ena_com_dev_get_features_ctx
*get_feat_ctx
,
2340 struct device
*dev
= &pdev
->dev
;
2341 bool readless_supported
;
2346 rc
= ena_com_mmio_reg_read_request_init(ena_dev
);
2348 dev_err(dev
, "failed to init mmio read less\n");
2352 /* The PCIe configuration space revision id indicate if mmio reg
2355 readless_supported
= !(pdev
->revision
& ENA_MMIO_DISABLE_REG_READ
);
2356 ena_com_set_mmio_read_mode(ena_dev
, readless_supported
);
2358 rc
= ena_com_dev_reset(ena_dev
);
2360 dev_err(dev
, "Can not reset device\n");
2361 goto err_mmio_read_less
;
2364 rc
= ena_com_validate_version(ena_dev
);
2366 dev_err(dev
, "device version is too low\n");
2367 goto err_mmio_read_less
;
2370 dma_width
= ena_com_get_dma_width(ena_dev
);
2371 if (dma_width
< 0) {
2372 dev_err(dev
, "Invalid dma width value %d", dma_width
);
2374 goto err_mmio_read_less
;
2377 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(dma_width
));
2379 dev_err(dev
, "pci_set_dma_mask failed 0x%x\n", rc
);
2380 goto err_mmio_read_less
;
2383 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(dma_width
));
2385 dev_err(dev
, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2387 goto err_mmio_read_less
;
2390 /* ENA admin level init */
2391 rc
= ena_com_admin_init(ena_dev
, &aenq_handlers
, true);
2394 "Can not initialize ena admin queue with device\n");
2395 goto err_mmio_read_less
;
2398 /* To enable the msix interrupts the driver needs to know the number
2399 * of queues. So the driver uses polling mode to retrieve this
2402 ena_com_set_admin_polling_mode(ena_dev
, true);
2404 ena_config_host_info(ena_dev
);
2406 /* Get Device Attributes*/
2407 rc
= ena_com_get_dev_attr_feat(ena_dev
, get_feat_ctx
);
2409 dev_err(dev
, "Cannot get attribute for ena device rc=%d\n", rc
);
2410 goto err_admin_init
;
2413 /* Try to turn all the available aenq groups */
2414 aenq_groups
= BIT(ENA_ADMIN_LINK_CHANGE
) |
2415 BIT(ENA_ADMIN_FATAL_ERROR
) |
2416 BIT(ENA_ADMIN_WARNING
) |
2417 BIT(ENA_ADMIN_NOTIFICATION
) |
2418 BIT(ENA_ADMIN_KEEP_ALIVE
);
2420 aenq_groups
&= get_feat_ctx
->aenq
.supported_groups
;
2422 rc
= ena_com_set_aenq_config(ena_dev
, aenq_groups
);
2424 dev_err(dev
, "Cannot configure aenq groups rc= %d\n", rc
);
2425 goto err_admin_init
;
2428 *wd_state
= !!(aenq_groups
& BIT(ENA_ADMIN_KEEP_ALIVE
));
2433 ena_com_delete_host_info(ena_dev
);
2434 ena_com_admin_destroy(ena_dev
);
2436 ena_com_mmio_reg_read_request_destroy(ena_dev
);
2441 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter
*adapter
,
2444 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2445 struct device
*dev
= &adapter
->pdev
->dev
;
2448 rc
= ena_enable_msix(adapter
, io_vectors
);
2450 dev_err(dev
, "Can not reserve msix vectors\n");
2454 ena_setup_mgmnt_intr(adapter
);
2456 rc
= ena_request_mgmnt_irq(adapter
);
2458 dev_err(dev
, "Can not setup management interrupts\n");
2459 goto err_disable_msix
;
2462 ena_com_set_admin_polling_mode(ena_dev
, false);
2464 ena_com_admin_aenq_enable(ena_dev
);
2469 pci_free_irq_vectors(adapter
->pdev
);
2473 static void ena_fw_reset_device(struct work_struct
*work
)
2475 struct ena_com_dev_get_features_ctx get_feat_ctx
;
2476 struct ena_adapter
*adapter
=
2477 container_of(work
, struct ena_adapter
, reset_task
);
2478 struct net_device
*netdev
= adapter
->netdev
;
2479 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2480 struct pci_dev
*pdev
= adapter
->pdev
;
2481 bool dev_up
, wd_state
;
2484 if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
2486 "device reset schedule while reset bit is off\n");
2490 netif_carrier_off(netdev
);
2492 del_timer_sync(&adapter
->timer_service
);
2496 dev_up
= test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
);
2497 ena_com_set_admin_running_state(ena_dev
, false);
2499 /* After calling ena_close the tx queues and the napi
2500 * are disabled so no one can interfere or touch the
2505 ena_free_mgmnt_irq(adapter
);
2507 pci_free_irq_vectors(adapter
->pdev
);
2509 ena_com_abort_admin_commands(ena_dev
);
2511 ena_com_wait_for_abort_completion(ena_dev
);
2513 ena_com_admin_destroy(ena_dev
);
2515 ena_com_mmio_reg_read_request_destroy(ena_dev
);
2517 clear_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2519 /* Finish with the destroy part. Start the init part */
2521 rc
= ena_device_init(ena_dev
, adapter
->pdev
, &get_feat_ctx
, &wd_state
);
2523 dev_err(&pdev
->dev
, "Can not initialize device\n");
2526 adapter
->wd_state
= wd_state
;
2528 rc
= ena_device_validate_params(adapter
, &get_feat_ctx
);
2530 dev_err(&pdev
->dev
, "Validation of device parameters failed\n");
2531 goto err_device_destroy
;
2534 rc
= ena_enable_msix_and_set_admin_interrupts(adapter
,
2535 adapter
->num_queues
);
2537 dev_err(&pdev
->dev
, "Enable MSI-X failed\n");
2538 goto err_device_destroy
;
2540 /* If the interface was up before the reset bring it up */
2542 rc
= ena_up(adapter
);
2544 dev_err(&pdev
->dev
, "Failed to create I/O queues\n");
2545 goto err_disable_msix
;
2549 mod_timer(&adapter
->timer_service
, round_jiffies(jiffies
+ HZ
));
2553 dev_err(&pdev
->dev
, "Device reset completed successfully\n");
2557 ena_free_mgmnt_irq(adapter
);
2558 pci_free_irq_vectors(adapter
->pdev
);
2560 ena_com_admin_destroy(ena_dev
);
2564 clear_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
2567 "Reset attempt failed. Can not reset the device\n");
2570 static int check_missing_comp_in_queue(struct ena_adapter
*adapter
,
2571 struct ena_ring
*tx_ring
)
2573 struct ena_tx_buffer
*tx_buf
;
2574 unsigned long last_jiffies
;
2578 for (i
= 0; i
< tx_ring
->ring_size
; i
++) {
2579 tx_buf
= &tx_ring
->tx_buffer_info
[i
];
2580 last_jiffies
= tx_buf
->last_jiffies
;
2581 if (unlikely(last_jiffies
&&
2582 time_is_before_jiffies(last_jiffies
+ TX_TIMEOUT
))) {
2583 if (!tx_buf
->print_once
)
2584 netif_notice(adapter
, tx_err
, adapter
->netdev
,
2585 "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2588 tx_buf
->print_once
= 1;
2591 if (unlikely(missed_tx
> MAX_NUM_OF_TIMEOUTED_PACKETS
)) {
2592 netif_err(adapter
, tx_err
, adapter
->netdev
,
2593 "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
2594 missed_tx
, MAX_NUM_OF_TIMEOUTED_PACKETS
);
2595 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2604 static void check_for_missing_tx_completions(struct ena_adapter
*adapter
)
2606 struct ena_ring
*tx_ring
;
2609 /* Make sure the driver doesn't turn the device in other process */
2612 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2615 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
2618 budget
= ENA_MONITORED_TX_QUEUES
;
2620 for (i
= adapter
->last_monitored_tx_qid
; i
< adapter
->num_queues
; i
++) {
2621 tx_ring
= &adapter
->tx_ring
[i
];
2623 rc
= check_missing_comp_in_queue(adapter
, tx_ring
);
2632 adapter
->last_monitored_tx_qid
= i
% adapter
->num_queues
;
2635 /* trigger napi schedule after 2 consecutive detections */
2636 #define EMPTY_RX_REFILL 2
2637 /* For the rare case where the device runs out of Rx descriptors and the
2638 * napi handler failed to refill new Rx descriptors (due to a lack of memory
2640 * This case will lead to a deadlock:
2641 * The device won't send interrupts since all the new Rx packets will be dropped
2642 * The napi handler won't allocate new Rx descriptors so the device will be
2643 * able to send new packets.
2645 * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
2646 * It is recommended to have at least 512MB, with a minimum of 128MB for
2647 * constrained environment).
2649 * When such a situation is detected - Reschedule napi
2651 static void check_for_empty_rx_ring(struct ena_adapter
*adapter
)
2653 struct ena_ring
*rx_ring
;
2654 int i
, refill_required
;
2656 if (!test_bit(ENA_FLAG_DEV_UP
, &adapter
->flags
))
2659 if (test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))
2662 for (i
= 0; i
< adapter
->num_queues
; i
++) {
2663 rx_ring
= &adapter
->rx_ring
[i
];
2666 ena_com_sq_empty_space(rx_ring
->ena_com_io_sq
);
2667 if (unlikely(refill_required
== (rx_ring
->ring_size
- 1))) {
2668 rx_ring
->empty_rx_queue
++;
2670 if (rx_ring
->empty_rx_queue
>= EMPTY_RX_REFILL
) {
2671 u64_stats_update_begin(&rx_ring
->syncp
);
2672 rx_ring
->rx_stats
.empty_rx_ring
++;
2673 u64_stats_update_end(&rx_ring
->syncp
);
2675 netif_err(adapter
, drv
, adapter
->netdev
,
2676 "trigger refill for ring %d\n", i
);
2678 napi_schedule(rx_ring
->napi
);
2679 rx_ring
->empty_rx_queue
= 0;
2682 rx_ring
->empty_rx_queue
= 0;
2687 /* Check for keep alive expiration */
2688 static void check_for_missing_keep_alive(struct ena_adapter
*adapter
)
2690 unsigned long keep_alive_expired
;
2692 if (!adapter
->wd_state
)
2695 keep_alive_expired
= round_jiffies(adapter
->last_keep_alive_jiffies
2696 + ENA_DEVICE_KALIVE_TIMEOUT
);
2697 if (unlikely(time_is_before_jiffies(keep_alive_expired
))) {
2698 netif_err(adapter
, drv
, adapter
->netdev
,
2699 "Keep alive watchdog timeout.\n");
2700 u64_stats_update_begin(&adapter
->syncp
);
2701 adapter
->dev_stats
.wd_expired
++;
2702 u64_stats_update_end(&adapter
->syncp
);
2703 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2707 static void check_for_admin_com_state(struct ena_adapter
*adapter
)
2709 if (unlikely(!ena_com_get_admin_running_state(adapter
->ena_dev
))) {
2710 netif_err(adapter
, drv
, adapter
->netdev
,
2711 "ENA admin queue is not in running state!\n");
2712 u64_stats_update_begin(&adapter
->syncp
);
2713 adapter
->dev_stats
.admin_q_pause
++;
2714 u64_stats_update_end(&adapter
->syncp
);
2715 set_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
);
2719 static void ena_update_host_info(struct ena_admin_host_info
*host_info
,
2720 struct net_device
*netdev
)
2722 host_info
->supported_network_features
[0] =
2723 netdev
->features
& GENMASK_ULL(31, 0);
2724 host_info
->supported_network_features
[1] =
2725 (netdev
->features
& GENMASK_ULL(63, 32)) >> 32;
2728 static void ena_timer_service(unsigned long data
)
2730 struct ena_adapter
*adapter
= (struct ena_adapter
*)data
;
2731 u8
*debug_area
= adapter
->ena_dev
->host_attr
.debug_area_virt_addr
;
2732 struct ena_admin_host_info
*host_info
=
2733 adapter
->ena_dev
->host_attr
.host_info
;
2735 check_for_missing_keep_alive(adapter
);
2737 check_for_admin_com_state(adapter
);
2739 check_for_missing_tx_completions(adapter
);
2741 check_for_empty_rx_ring(adapter
);
2744 ena_dump_stats_to_buf(adapter
, debug_area
);
2747 ena_update_host_info(host_info
, adapter
->netdev
);
2749 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET
, &adapter
->flags
))) {
2750 netif_err(adapter
, drv
, adapter
->netdev
,
2751 "Trigger reset is on\n");
2752 ena_dump_stats_to_dmesg(adapter
);
2753 queue_work(ena_wq
, &adapter
->reset_task
);
2757 /* Reset the timer */
2758 mod_timer(&adapter
->timer_service
, jiffies
+ HZ
);
2761 static int ena_calc_io_queue_num(struct pci_dev
*pdev
,
2762 struct ena_com_dev
*ena_dev
,
2763 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2765 int io_sq_num
, io_queue_num
;
2767 /* In case of LLQ use the llq number in the get feature cmd */
2768 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
2769 io_sq_num
= get_feat_ctx
->max_queues
.max_llq_num
;
2771 if (io_sq_num
== 0) {
2773 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2775 ena_dev
->tx_mem_queue_type
=
2776 ENA_ADMIN_PLACEMENT_POLICY_HOST
;
2777 io_sq_num
= get_feat_ctx
->max_queues
.max_sq_num
;
2780 io_sq_num
= get_feat_ctx
->max_queues
.max_sq_num
;
2783 io_queue_num
= min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES
);
2784 io_queue_num
= min_t(int, io_queue_num
, io_sq_num
);
2785 io_queue_num
= min_t(int, io_queue_num
,
2786 get_feat_ctx
->max_queues
.max_cq_num
);
2787 /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2788 io_queue_num
= min_t(int, io_queue_num
, pci_msix_vec_count(pdev
) - 1);
2789 if (unlikely(!io_queue_num
)) {
2790 dev_err(&pdev
->dev
, "The device doesn't have io queues\n");
2794 return io_queue_num
;
2797 static void ena_set_push_mode(struct pci_dev
*pdev
, struct ena_com_dev
*ena_dev
,
2798 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2802 has_mem_bar
= pci_select_bars(pdev
, IORESOURCE_MEM
) & BIT(ENA_MEM_BAR
);
2804 /* Enable push mode if device supports LLQ */
2805 if (has_mem_bar
&& (get_feat_ctx
->max_queues
.max_llq_num
> 0))
2806 ena_dev
->tx_mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_DEV
;
2808 ena_dev
->tx_mem_queue_type
= ENA_ADMIN_PLACEMENT_POLICY_HOST
;
2811 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx
*feat
,
2812 struct net_device
*netdev
)
2814 netdev_features_t dev_features
= 0;
2816 /* Set offload features */
2817 if (feat
->offload
.tx
&
2818 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK
)
2819 dev_features
|= NETIF_F_IP_CSUM
;
2821 if (feat
->offload
.tx
&
2822 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK
)
2823 dev_features
|= NETIF_F_IPV6_CSUM
;
2825 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK
)
2826 dev_features
|= NETIF_F_TSO
;
2828 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK
)
2829 dev_features
|= NETIF_F_TSO6
;
2831 if (feat
->offload
.tx
& ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK
)
2832 dev_features
|= NETIF_F_TSO_ECN
;
2834 if (feat
->offload
.rx_supported
&
2835 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK
)
2836 dev_features
|= NETIF_F_RXCSUM
;
2838 if (feat
->offload
.rx_supported
&
2839 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK
)
2840 dev_features
|= NETIF_F_RXCSUM
;
2848 netdev
->hw_features
|= netdev
->features
;
2849 netdev
->vlan_features
|= netdev
->features
;
2852 static void ena_set_conf_feat_params(struct ena_adapter
*adapter
,
2853 struct ena_com_dev_get_features_ctx
*feat
)
2855 struct net_device
*netdev
= adapter
->netdev
;
2857 /* Copy mac address */
2858 if (!is_valid_ether_addr(feat
->dev_attr
.mac_addr
)) {
2859 eth_hw_addr_random(netdev
);
2860 ether_addr_copy(adapter
->mac_addr
, netdev
->dev_addr
);
2862 ether_addr_copy(adapter
->mac_addr
, feat
->dev_attr
.mac_addr
);
2863 ether_addr_copy(netdev
->dev_addr
, adapter
->mac_addr
);
2866 /* Set offload features */
2867 ena_set_dev_offloads(feat
, netdev
);
2869 adapter
->max_mtu
= feat
->dev_attr
.max_mtu
;
2870 netdev
->max_mtu
= adapter
->max_mtu
;
2871 netdev
->min_mtu
= ENA_MIN_MTU
;
2874 static int ena_rss_init_default(struct ena_adapter
*adapter
)
2876 struct ena_com_dev
*ena_dev
= adapter
->ena_dev
;
2877 struct device
*dev
= &adapter
->pdev
->dev
;
2881 rc
= ena_com_rss_init(ena_dev
, ENA_RX_RSS_TABLE_LOG_SIZE
);
2883 dev_err(dev
, "Cannot init indirect table\n");
2887 for (i
= 0; i
< ENA_RX_RSS_TABLE_SIZE
; i
++) {
2888 val
= ethtool_rxfh_indir_default(i
, adapter
->num_queues
);
2889 rc
= ena_com_indirect_table_fill_entry(ena_dev
, i
,
2890 ENA_IO_RXQ_IDX(val
));
2891 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
2892 dev_err(dev
, "Cannot fill indirect table\n");
2893 goto err_fill_indir
;
2897 rc
= ena_com_fill_hash_function(ena_dev
, ENA_ADMIN_CRC32
, NULL
,
2898 ENA_HASH_KEY_SIZE
, 0xFFFFFFFF);
2899 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
2900 dev_err(dev
, "Cannot fill hash function\n");
2901 goto err_fill_indir
;
2904 rc
= ena_com_set_default_hash_ctrl(ena_dev
);
2905 if (unlikely(rc
&& (rc
!= -EOPNOTSUPP
))) {
2906 dev_err(dev
, "Cannot fill hash control\n");
2907 goto err_fill_indir
;
2913 ena_com_rss_destroy(ena_dev
);
2919 static void ena_release_bars(struct ena_com_dev
*ena_dev
, struct pci_dev
*pdev
)
2923 if (ena_dev
->mem_bar
)
2924 devm_iounmap(&pdev
->dev
, ena_dev
->mem_bar
);
2926 devm_iounmap(&pdev
->dev
, ena_dev
->reg_bar
);
2928 release_bars
= pci_select_bars(pdev
, IORESOURCE_MEM
) & ENA_BAR_MASK
;
2929 pci_release_selected_regions(pdev
, release_bars
);
2932 static int ena_calc_queue_size(struct pci_dev
*pdev
,
2933 struct ena_com_dev
*ena_dev
,
2934 u16
*max_tx_sgl_size
,
2935 u16
*max_rx_sgl_size
,
2936 struct ena_com_dev_get_features_ctx
*get_feat_ctx
)
2938 u32 queue_size
= ENA_DEFAULT_RING_SIZE
;
2940 queue_size
= min_t(u32
, queue_size
,
2941 get_feat_ctx
->max_queues
.max_cq_depth
);
2942 queue_size
= min_t(u32
, queue_size
,
2943 get_feat_ctx
->max_queues
.max_sq_depth
);
2945 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
)
2946 queue_size
= min_t(u32
, queue_size
,
2947 get_feat_ctx
->max_queues
.max_llq_depth
);
2949 queue_size
= rounddown_pow_of_two(queue_size
);
2951 if (unlikely(!queue_size
)) {
2952 dev_err(&pdev
->dev
, "Invalid queue size\n");
2956 *max_tx_sgl_size
= min_t(u16
, ENA_PKT_MAX_BUFS
,
2957 get_feat_ctx
->max_queues
.max_packet_tx_descs
);
2958 *max_rx_sgl_size
= min_t(u16
, ENA_PKT_MAX_BUFS
,
2959 get_feat_ctx
->max_queues
.max_packet_rx_descs
);
2964 /* ena_probe - Device Initialization Routine
2965 * @pdev: PCI device information struct
2966 * @ent: entry in ena_pci_tbl
2968 * Returns 0 on success, negative on failure
2970 * ena_probe initializes an adapter identified by a pci_dev structure.
2971 * The OS initialization, configuring of the adapter private structure,
2972 * and a hardware reset occur.
2974 static int ena_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2976 struct ena_com_dev_get_features_ctx get_feat_ctx
;
2977 static int version_printed
;
2978 struct net_device
*netdev
;
2979 struct ena_adapter
*adapter
;
2980 struct ena_com_dev
*ena_dev
= NULL
;
2981 static int adapters_found
;
2982 int io_queue_num
, bars
, rc
;
2984 u16 tx_sgl_size
= 0;
2985 u16 rx_sgl_size
= 0;
2988 dev_dbg(&pdev
->dev
, "%s\n", __func__
);
2990 if (version_printed
++ == 0)
2991 dev_info(&pdev
->dev
, "%s", version
);
2993 rc
= pci_enable_device_mem(pdev
);
2995 dev_err(&pdev
->dev
, "pci_enable_device_mem() failed!\n");
2999 pci_set_master(pdev
);
3001 ena_dev
= vzalloc(sizeof(*ena_dev
));
3004 goto err_disable_device
;
3007 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
) & ENA_BAR_MASK
;
3008 rc
= pci_request_selected_regions(pdev
, bars
, DRV_MODULE_NAME
);
3010 dev_err(&pdev
->dev
, "pci_request_selected_regions failed %d\n",
3012 goto err_free_ena_dev
;
3015 ena_dev
->reg_bar
= devm_ioremap(&pdev
->dev
,
3016 pci_resource_start(pdev
, ENA_REG_BAR
),
3017 pci_resource_len(pdev
, ENA_REG_BAR
));
3018 if (!ena_dev
->reg_bar
) {
3019 dev_err(&pdev
->dev
, "failed to remap regs bar\n");
3021 goto err_free_region
;
3024 ena_dev
->dmadev
= &pdev
->dev
;
3026 rc
= ena_device_init(ena_dev
, pdev
, &get_feat_ctx
, &wd_state
);
3028 dev_err(&pdev
->dev
, "ena device init failed\n");
3031 goto err_free_region
;
3034 ena_set_push_mode(pdev
, ena_dev
, &get_feat_ctx
);
3036 if (ena_dev
->tx_mem_queue_type
== ENA_ADMIN_PLACEMENT_POLICY_DEV
) {
3037 ena_dev
->mem_bar
= devm_ioremap_wc(&pdev
->dev
,
3038 pci_resource_start(pdev
, ENA_MEM_BAR
),
3039 pci_resource_len(pdev
, ENA_MEM_BAR
));
3040 if (!ena_dev
->mem_bar
) {
3042 goto err_device_destroy
;
3046 /* initial Tx interrupt delay, Assumes 1 usec granularity.
3047 * Updated during device initialization with the real granularity
3049 ena_dev
->intr_moder_tx_interval
= ENA_INTR_INITIAL_TX_INTERVAL_USECS
;
3050 io_queue_num
= ena_calc_io_queue_num(pdev
, ena_dev
, &get_feat_ctx
);
3051 queue_size
= ena_calc_queue_size(pdev
, ena_dev
, &tx_sgl_size
,
3052 &rx_sgl_size
, &get_feat_ctx
);
3053 if ((queue_size
<= 0) || (io_queue_num
<= 0)) {
3055 goto err_device_destroy
;
3058 dev_info(&pdev
->dev
, "creating %d io queues. queue size: %d\n",
3059 io_queue_num
, queue_size
);
3061 /* dev zeroed in init_etherdev */
3062 netdev
= alloc_etherdev_mq(sizeof(struct ena_adapter
), io_queue_num
);
3064 dev_err(&pdev
->dev
, "alloc_etherdev_mq failed\n");
3066 goto err_device_destroy
;
3069 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
3071 adapter
= netdev_priv(netdev
);
3072 pci_set_drvdata(pdev
, adapter
);
3074 adapter
->ena_dev
= ena_dev
;
3075 adapter
->netdev
= netdev
;
3076 adapter
->pdev
= pdev
;
3078 ena_set_conf_feat_params(adapter
, &get_feat_ctx
);
3080 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
3082 adapter
->tx_ring_size
= queue_size
;
3083 adapter
->rx_ring_size
= queue_size
;
3085 adapter
->max_tx_sgl_size
= tx_sgl_size
;
3086 adapter
->max_rx_sgl_size
= rx_sgl_size
;
3088 adapter
->num_queues
= io_queue_num
;
3089 adapter
->last_monitored_tx_qid
= 0;
3091 adapter
->rx_copybreak
= ENA_DEFAULT_RX_COPYBREAK
;
3092 adapter
->wd_state
= wd_state
;
3094 snprintf(adapter
->name
, ENA_NAME_MAX_LEN
, "ena_%d", adapters_found
);
3096 rc
= ena_com_init_interrupt_moderation(adapter
->ena_dev
);
3099 "Failed to query interrupt moderation feature\n");
3100 goto err_netdev_destroy
;
3102 ena_init_io_rings(adapter
);
3104 netdev
->netdev_ops
= &ena_netdev_ops
;
3105 netdev
->watchdog_timeo
= TX_TIMEOUT
;
3106 ena_set_ethtool_ops(netdev
);
3108 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
3110 u64_stats_init(&adapter
->syncp
);
3112 rc
= ena_enable_msix_and_set_admin_interrupts(adapter
, io_queue_num
);
3115 "Failed to enable and set the admin interrupts\n");
3116 goto err_worker_destroy
;
3118 rc
= ena_rss_init_default(adapter
);
3119 if (rc
&& (rc
!= -EOPNOTSUPP
)) {
3120 dev_err(&pdev
->dev
, "Cannot init RSS rc: %d\n", rc
);
3124 ena_config_debug_area(adapter
);
3126 memcpy(adapter
->netdev
->perm_addr
, adapter
->mac_addr
, netdev
->addr_len
);
3128 netif_carrier_off(netdev
);
3130 rc
= register_netdev(netdev
);
3132 dev_err(&pdev
->dev
, "Cannot register net device\n");
3136 INIT_WORK(&adapter
->suspend_io_task
, ena_device_io_suspend
);
3137 INIT_WORK(&adapter
->resume_io_task
, ena_device_io_resume
);
3138 INIT_WORK(&adapter
->reset_task
, ena_fw_reset_device
);
3140 adapter
->last_keep_alive_jiffies
= jiffies
;
3142 setup_timer(&adapter
->timer_service
, ena_timer_service
,
3143 (unsigned long)adapter
);
3144 mod_timer(&adapter
->timer_service
, round_jiffies(jiffies
+ HZ
));
3146 dev_info(&pdev
->dev
, "%s found at mem %lx, mac addr %pM Queues %d\n",
3147 DEVICE_NAME
, (long)pci_resource_start(pdev
, 0),
3148 netdev
->dev_addr
, io_queue_num
);
3150 set_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
);
3157 ena_com_delete_debug_area(ena_dev
);
3158 ena_com_rss_destroy(ena_dev
);
3160 ena_com_dev_reset(ena_dev
);
3161 ena_free_mgmnt_irq(adapter
);
3162 pci_free_irq_vectors(adapter
->pdev
);
3164 ena_com_destroy_interrupt_moderation(ena_dev
);
3165 del_timer(&adapter
->timer_service
);
3166 cancel_work_sync(&adapter
->suspend_io_task
);
3167 cancel_work_sync(&adapter
->resume_io_task
);
3169 free_netdev(netdev
);
3171 ena_com_delete_host_info(ena_dev
);
3172 ena_com_admin_destroy(ena_dev
);
3174 ena_release_bars(ena_dev
, pdev
);
3178 pci_disable_device(pdev
);
3182 /*****************************************************************************/
3183 static int ena_sriov_configure(struct pci_dev
*dev
, int numvfs
)
3188 rc
= pci_enable_sriov(dev
, numvfs
);
3191 "pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
3200 pci_disable_sriov(dev
);
3207 /*****************************************************************************/
3208 /*****************************************************************************/
3210 /* ena_remove - Device Removal Routine
3211 * @pdev: PCI device information struct
3213 * ena_remove is called by the PCI subsystem to alert the driver
3214 * that it should release a PCI device.
3216 static void ena_remove(struct pci_dev
*pdev
)
3218 struct ena_adapter
*adapter
= pci_get_drvdata(pdev
);
3219 struct ena_com_dev
*ena_dev
;
3220 struct net_device
*netdev
;
3222 ena_dev
= adapter
->ena_dev
;
3223 netdev
= adapter
->netdev
;
3225 #ifdef CONFIG_RFS_ACCEL
3226 if ((adapter
->msix_vecs
>= 1) && (netdev
->rx_cpu_rmap
)) {
3227 free_irq_cpu_rmap(netdev
->rx_cpu_rmap
);
3228 netdev
->rx_cpu_rmap
= NULL
;
3230 #endif /* CONFIG_RFS_ACCEL */
3232 unregister_netdev(netdev
);
3233 del_timer_sync(&adapter
->timer_service
);
3235 cancel_work_sync(&adapter
->reset_task
);
3237 cancel_work_sync(&adapter
->suspend_io_task
);
3239 cancel_work_sync(&adapter
->resume_io_task
);
3241 /* Reset the device only if the device is running. */
3242 if (test_bit(ENA_FLAG_DEVICE_RUNNING
, &adapter
->flags
))
3243 ena_com_dev_reset(ena_dev
);
3245 ena_free_mgmnt_irq(adapter
);
3247 pci_free_irq_vectors(adapter
->pdev
);
3249 free_netdev(netdev
);
3251 ena_com_mmio_reg_read_request_destroy(ena_dev
);
3253 ena_com_abort_admin_commands(ena_dev
);
3255 ena_com_wait_for_abort_completion(ena_dev
);
3257 ena_com_admin_destroy(ena_dev
);
3259 ena_com_rss_destroy(ena_dev
);
3261 ena_com_delete_debug_area(ena_dev
);
3263 ena_com_delete_host_info(ena_dev
);
3265 ena_release_bars(ena_dev
, pdev
);
3267 pci_disable_device(pdev
);
3269 ena_com_destroy_interrupt_moderation(ena_dev
);
3274 static struct pci_driver ena_pci_driver
= {
3275 .name
= DRV_MODULE_NAME
,
3276 .id_table
= ena_pci_tbl
,
3278 .remove
= ena_remove
,
3279 .sriov_configure
= ena_sriov_configure
,
3282 static int __init
ena_init(void)
3284 pr_info("%s", version
);
3286 ena_wq
= create_singlethread_workqueue(DRV_MODULE_NAME
);
3288 pr_err("Failed to create workqueue\n");
3292 return pci_register_driver(&ena_pci_driver
);
3295 static void __exit
ena_cleanup(void)
3297 pci_unregister_driver(&ena_pci_driver
);
3300 destroy_workqueue(ena_wq
);
3305 /******************************************************************************
3306 ******************************** AENQ Handlers *******************************
3307 *****************************************************************************/
3308 /* ena_update_on_link_change:
3309 * Notify the network interface about the change in link status
3311 static void ena_update_on_link_change(void *adapter_data
,
3312 struct ena_admin_aenq_entry
*aenq_e
)
3314 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3315 struct ena_admin_aenq_link_change_desc
*aenq_desc
=
3316 (struct ena_admin_aenq_link_change_desc
*)aenq_e
;
3317 int status
= aenq_desc
->flags
&
3318 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK
;
3321 netdev_dbg(adapter
->netdev
, "%s\n", __func__
);
3322 set_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
);
3323 netif_carrier_on(adapter
->netdev
);
3325 clear_bit(ENA_FLAG_LINK_UP
, &adapter
->flags
);
3326 netif_carrier_off(adapter
->netdev
);
3330 static void ena_keep_alive_wd(void *adapter_data
,
3331 struct ena_admin_aenq_entry
*aenq_e
)
3333 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3335 adapter
->last_keep_alive_jiffies
= jiffies
;
3338 static void ena_notification(void *adapter_data
,
3339 struct ena_admin_aenq_entry
*aenq_e
)
3341 struct ena_adapter
*adapter
= (struct ena_adapter
*)adapter_data
;
3343 WARN(aenq_e
->aenq_common_desc
.group
!= ENA_ADMIN_NOTIFICATION
,
3344 "Invalid group(%x) expected %x\n",
3345 aenq_e
->aenq_common_desc
.group
,
3346 ENA_ADMIN_NOTIFICATION
);
3348 switch (aenq_e
->aenq_common_desc
.syndrom
) {
3349 case ENA_ADMIN_SUSPEND
:
3350 /* Suspend just the IO queues.
3351 * We deliberately don't suspend admin so the timer and
3352 * the keep_alive events should remain.
3354 queue_work(ena_wq
, &adapter
->suspend_io_task
);
3356 case ENA_ADMIN_RESUME
:
3357 queue_work(ena_wq
, &adapter
->resume_io_task
);
3360 netif_err(adapter
, drv
, adapter
->netdev
,
3361 "Invalid aenq notification link state %d\n",
3362 aenq_e
->aenq_common_desc
.syndrom
);
3366 /* This handler will called for unknown event group or unimplemented handlers*/
3367 static void unimplemented_aenq_handler(void *data
,
3368 struct ena_admin_aenq_entry
*aenq_e
)
3370 struct ena_adapter
*adapter
= (struct ena_adapter
*)data
;
3372 netif_err(adapter
, drv
, adapter
->netdev
,
3373 "Unknown event was received or event with unimplemented handler\n");
3376 static struct ena_aenq_handlers aenq_handlers
= {
3378 [ENA_ADMIN_LINK_CHANGE
] = ena_update_on_link_change
,
3379 [ENA_ADMIN_NOTIFICATION
] = ena_notification
,
3380 [ENA_ADMIN_KEEP_ALIVE
] = ena_keep_alive_wd
,
3382 .unimplemented_handler
= unimplemented_aenq_handler
3385 module_init(ena_init
);
3386 module_exit(ena_cleanup
);