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Merge 4.14.24 into android-4.14
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / net / ethernet / amazon / ena / ena_netdev.c
1 /*
2 * Copyright 2015 Amazon.com, Inc. or its affiliates.
3 *
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
8 * BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 */
32
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
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>
48 #include <net/ip.h>
49
50 #include "ena_netdev.h"
51 #include "ena_pci_id_tbl.h"
52
53 static char version[] = DEVICE_NAME " v" DRV_MODULE_VERSION "\n";
54
55 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
56 MODULE_DESCRIPTION(DEVICE_NAME);
57 MODULE_LICENSE("GPL");
58 MODULE_VERSION(DRV_MODULE_VERSION);
59
60 /* Time in jiffies before concluding the transmitter is hung. */
61 #define TX_TIMEOUT (5 * HZ)
62
63 #define ENA_NAPI_BUDGET 64
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)");
70
71 static struct ena_aenq_handlers aenq_handlers;
72
73 static struct workqueue_struct *ena_wq;
74
75 MODULE_DEVICE_TABLE(pci, ena_pci_tbl);
76
77 static int ena_rss_init_default(struct ena_adapter *adapter);
78
79 static void ena_tx_timeout(struct net_device *dev)
80 {
81 struct ena_adapter *adapter = netdev_priv(dev);
82
83 /* Change the state of the device to trigger reset
84 * Check that we are not in the middle or a trigger already
85 */
86
87 if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
88 return;
89
90 adapter->reset_reason = ENA_REGS_RESET_OS_NETDEV_WD;
91 u64_stats_update_begin(&adapter->syncp);
92 adapter->dev_stats.tx_timeout++;
93 u64_stats_update_end(&adapter->syncp);
94
95 netif_err(adapter, tx_err, dev, "Transmit time out\n");
96 }
97
98 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
99 {
100 int i;
101
102 for (i = 0; i < adapter->num_queues; i++)
103 adapter->rx_ring[i].mtu = mtu;
104 }
105
106 static int ena_change_mtu(struct net_device *dev, int new_mtu)
107 {
108 struct ena_adapter *adapter = netdev_priv(dev);
109 int ret;
110
111 ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
112 if (!ret) {
113 netif_dbg(adapter, drv, dev, "set MTU to %d\n", new_mtu);
114 update_rx_ring_mtu(adapter, new_mtu);
115 dev->mtu = new_mtu;
116 } else {
117 netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
118 new_mtu);
119 }
120
121 return ret;
122 }
123
124 static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
125 {
126 #ifdef CONFIG_RFS_ACCEL
127 u32 i;
128 int rc;
129
130 adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_queues);
131 if (!adapter->netdev->rx_cpu_rmap)
132 return -ENOMEM;
133 for (i = 0; i < adapter->num_queues; i++) {
134 int irq_idx = ENA_IO_IRQ_IDX(i);
135
136 rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
137 pci_irq_vector(adapter->pdev, irq_idx));
138 if (rc) {
139 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
140 adapter->netdev->rx_cpu_rmap = NULL;
141 return rc;
142 }
143 }
144 #endif /* CONFIG_RFS_ACCEL */
145 return 0;
146 }
147
148 static void ena_init_io_rings_common(struct ena_adapter *adapter,
149 struct ena_ring *ring, u16 qid)
150 {
151 ring->qid = qid;
152 ring->pdev = adapter->pdev;
153 ring->dev = &adapter->pdev->dev;
154 ring->netdev = adapter->netdev;
155 ring->napi = &adapter->ena_napi[qid].napi;
156 ring->adapter = adapter;
157 ring->ena_dev = adapter->ena_dev;
158 ring->per_napi_packets = 0;
159 ring->per_napi_bytes = 0;
160 ring->cpu = 0;
161 u64_stats_init(&ring->syncp);
162 }
163
164 static void ena_init_io_rings(struct ena_adapter *adapter)
165 {
166 struct ena_com_dev *ena_dev;
167 struct ena_ring *txr, *rxr;
168 int i;
169
170 ena_dev = adapter->ena_dev;
171
172 for (i = 0; i < adapter->num_queues; i++) {
173 txr = &adapter->tx_ring[i];
174 rxr = &adapter->rx_ring[i];
175
176 /* TX/RX common ring state */
177 ena_init_io_rings_common(adapter, txr, i);
178 ena_init_io_rings_common(adapter, rxr, i);
179
180 /* TX specific ring state */
181 txr->ring_size = adapter->tx_ring_size;
182 txr->tx_max_header_size = ena_dev->tx_max_header_size;
183 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
184 txr->sgl_size = adapter->max_tx_sgl_size;
185 txr->smoothed_interval =
186 ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
187
188 /* RX specific ring state */
189 rxr->ring_size = adapter->rx_ring_size;
190 rxr->rx_copybreak = adapter->rx_copybreak;
191 rxr->sgl_size = adapter->max_rx_sgl_size;
192 rxr->smoothed_interval =
193 ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
194 rxr->empty_rx_queue = 0;
195 }
196 }
197
198 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
199 * @adapter: network interface device structure
200 * @qid: queue index
201 *
202 * Return 0 on success, negative on failure
203 */
204 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
205 {
206 struct ena_ring *tx_ring = &adapter->tx_ring[qid];
207 struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
208 int size, i, node;
209
210 if (tx_ring->tx_buffer_info) {
211 netif_err(adapter, ifup,
212 adapter->netdev, "tx_buffer_info info is not NULL");
213 return -EEXIST;
214 }
215
216 size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
217 node = cpu_to_node(ena_irq->cpu);
218
219 tx_ring->tx_buffer_info = vzalloc_node(size, node);
220 if (!tx_ring->tx_buffer_info) {
221 tx_ring->tx_buffer_info = vzalloc(size);
222 if (!tx_ring->tx_buffer_info)
223 return -ENOMEM;
224 }
225
226 size = sizeof(u16) * tx_ring->ring_size;
227 tx_ring->free_tx_ids = vzalloc_node(size, node);
228 if (!tx_ring->free_tx_ids) {
229 tx_ring->free_tx_ids = vzalloc(size);
230 if (!tx_ring->free_tx_ids) {
231 vfree(tx_ring->tx_buffer_info);
232 return -ENOMEM;
233 }
234 }
235
236 /* Req id ring for TX out of order completions */
237 for (i = 0; i < tx_ring->ring_size; i++)
238 tx_ring->free_tx_ids[i] = i;
239
240 /* Reset tx statistics */
241 memset(&tx_ring->tx_stats, 0x0, sizeof(tx_ring->tx_stats));
242
243 tx_ring->next_to_use = 0;
244 tx_ring->next_to_clean = 0;
245 tx_ring->cpu = ena_irq->cpu;
246 return 0;
247 }
248
249 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
250 * @adapter: network interface device structure
251 * @qid: queue index
252 *
253 * Free all transmit software resources
254 */
255 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
256 {
257 struct ena_ring *tx_ring = &adapter->tx_ring[qid];
258
259 vfree(tx_ring->tx_buffer_info);
260 tx_ring->tx_buffer_info = NULL;
261
262 vfree(tx_ring->free_tx_ids);
263 tx_ring->free_tx_ids = NULL;
264 }
265
266 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
267 * @adapter: private structure
268 *
269 * Return 0 on success, negative on failure
270 */
271 static int ena_setup_all_tx_resources(struct ena_adapter *adapter)
272 {
273 int i, rc = 0;
274
275 for (i = 0; i < adapter->num_queues; i++) {
276 rc = ena_setup_tx_resources(adapter, i);
277 if (rc)
278 goto err_setup_tx;
279 }
280
281 return 0;
282
283 err_setup_tx:
284
285 netif_err(adapter, ifup, adapter->netdev,
286 "Tx queue %d: allocation failed\n", i);
287
288 /* rewind the index freeing the rings as we go */
289 while (i--)
290 ena_free_tx_resources(adapter, i);
291 return rc;
292 }
293
294 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
295 * @adapter: board private structure
296 *
297 * Free all transmit software resources
298 */
299 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
300 {
301 int i;
302
303 for (i = 0; i < adapter->num_queues; i++)
304 ena_free_tx_resources(adapter, i);
305 }
306
307 static inline int validate_rx_req_id(struct ena_ring *rx_ring, u16 req_id)
308 {
309 if (likely(req_id < rx_ring->ring_size))
310 return 0;
311
312 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
313 "Invalid rx req_id: %hu\n", req_id);
314
315 u64_stats_update_begin(&rx_ring->syncp);
316 rx_ring->rx_stats.bad_req_id++;
317 u64_stats_update_end(&rx_ring->syncp);
318
319 /* Trigger device reset */
320 rx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
321 set_bit(ENA_FLAG_TRIGGER_RESET, &rx_ring->adapter->flags);
322 return -EFAULT;
323 }
324
325 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
326 * @adapter: network interface device structure
327 * @qid: queue index
328 *
329 * Returns 0 on success, negative on failure
330 */
331 static int ena_setup_rx_resources(struct ena_adapter *adapter,
332 u32 qid)
333 {
334 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
335 struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
336 int size, node, i;
337
338 if (rx_ring->rx_buffer_info) {
339 netif_err(adapter, ifup, adapter->netdev,
340 "rx_buffer_info is not NULL");
341 return -EEXIST;
342 }
343
344 /* alloc extra element so in rx path
345 * we can always prefetch rx_info + 1
346 */
347 size = sizeof(struct ena_rx_buffer) * (rx_ring->ring_size + 1);
348 node = cpu_to_node(ena_irq->cpu);
349
350 rx_ring->rx_buffer_info = vzalloc_node(size, node);
351 if (!rx_ring->rx_buffer_info) {
352 rx_ring->rx_buffer_info = vzalloc(size);
353 if (!rx_ring->rx_buffer_info)
354 return -ENOMEM;
355 }
356
357 size = sizeof(u16) * rx_ring->ring_size;
358 rx_ring->free_rx_ids = vzalloc_node(size, node);
359 if (!rx_ring->free_rx_ids) {
360 rx_ring->free_rx_ids = vzalloc(size);
361 if (!rx_ring->free_rx_ids) {
362 vfree(rx_ring->rx_buffer_info);
363 return -ENOMEM;
364 }
365 }
366
367 /* Req id ring for receiving RX pkts out of order */
368 for (i = 0; i < rx_ring->ring_size; i++)
369 rx_ring->free_rx_ids[i] = i;
370
371 /* Reset rx statistics */
372 memset(&rx_ring->rx_stats, 0x0, sizeof(rx_ring->rx_stats));
373
374 rx_ring->next_to_clean = 0;
375 rx_ring->next_to_use = 0;
376 rx_ring->cpu = ena_irq->cpu;
377
378 return 0;
379 }
380
381 /* ena_free_rx_resources - Free I/O Rx Resources
382 * @adapter: network interface device structure
383 * @qid: queue index
384 *
385 * Free all receive software resources
386 */
387 static void ena_free_rx_resources(struct ena_adapter *adapter,
388 u32 qid)
389 {
390 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
391
392 vfree(rx_ring->rx_buffer_info);
393 rx_ring->rx_buffer_info = NULL;
394
395 vfree(rx_ring->free_rx_ids);
396 rx_ring->free_rx_ids = NULL;
397 }
398
399 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
400 * @adapter: board private structure
401 *
402 * Return 0 on success, negative on failure
403 */
404 static int ena_setup_all_rx_resources(struct ena_adapter *adapter)
405 {
406 int i, rc = 0;
407
408 for (i = 0; i < adapter->num_queues; i++) {
409 rc = ena_setup_rx_resources(adapter, i);
410 if (rc)
411 goto err_setup_rx;
412 }
413
414 return 0;
415
416 err_setup_rx:
417
418 netif_err(adapter, ifup, adapter->netdev,
419 "Rx queue %d: allocation failed\n", i);
420
421 /* rewind the index freeing the rings as we go */
422 while (i--)
423 ena_free_rx_resources(adapter, i);
424 return rc;
425 }
426
427 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
428 * @adapter: board private structure
429 *
430 * Free all receive software resources
431 */
432 static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
433 {
434 int i;
435
436 for (i = 0; i < adapter->num_queues; i++)
437 ena_free_rx_resources(adapter, i);
438 }
439
440 static inline int ena_alloc_rx_page(struct ena_ring *rx_ring,
441 struct ena_rx_buffer *rx_info, gfp_t gfp)
442 {
443 struct ena_com_buf *ena_buf;
444 struct page *page;
445 dma_addr_t dma;
446
447 /* if previous allocated page is not used */
448 if (unlikely(rx_info->page))
449 return 0;
450
451 page = alloc_page(gfp);
452 if (unlikely(!page)) {
453 u64_stats_update_begin(&rx_ring->syncp);
454 rx_ring->rx_stats.page_alloc_fail++;
455 u64_stats_update_end(&rx_ring->syncp);
456 return -ENOMEM;
457 }
458
459 dma = dma_map_page(rx_ring->dev, page, 0, PAGE_SIZE,
460 DMA_FROM_DEVICE);
461 if (unlikely(dma_mapping_error(rx_ring->dev, dma))) {
462 u64_stats_update_begin(&rx_ring->syncp);
463 rx_ring->rx_stats.dma_mapping_err++;
464 u64_stats_update_end(&rx_ring->syncp);
465
466 __free_page(page);
467 return -EIO;
468 }
469 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
470 "alloc page %p, rx_info %p\n", page, rx_info);
471
472 rx_info->page = page;
473 rx_info->page_offset = 0;
474 ena_buf = &rx_info->ena_buf;
475 ena_buf->paddr = dma;
476 ena_buf->len = PAGE_SIZE;
477
478 return 0;
479 }
480
481 static void ena_free_rx_page(struct ena_ring *rx_ring,
482 struct ena_rx_buffer *rx_info)
483 {
484 struct page *page = rx_info->page;
485 struct ena_com_buf *ena_buf = &rx_info->ena_buf;
486
487 if (unlikely(!page)) {
488 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
489 "Trying to free unallocated buffer\n");
490 return;
491 }
492
493 dma_unmap_page(rx_ring->dev, ena_buf->paddr, PAGE_SIZE,
494 DMA_FROM_DEVICE);
495
496 __free_page(page);
497 rx_info->page = NULL;
498 }
499
500 static int ena_refill_rx_bufs(struct ena_ring *rx_ring, u32 num)
501 {
502 u16 next_to_use, req_id;
503 u32 i;
504 int rc;
505
506 next_to_use = rx_ring->next_to_use;
507
508 for (i = 0; i < num; i++) {
509 struct ena_rx_buffer *rx_info;
510
511 req_id = rx_ring->free_rx_ids[next_to_use];
512 rc = validate_rx_req_id(rx_ring, req_id);
513 if (unlikely(rc < 0))
514 break;
515
516 rx_info = &rx_ring->rx_buffer_info[req_id];
517
518
519 rc = ena_alloc_rx_page(rx_ring, rx_info,
520 __GFP_COLD | GFP_ATOMIC | __GFP_COMP);
521 if (unlikely(rc < 0)) {
522 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
523 "failed to alloc buffer for rx queue %d\n",
524 rx_ring->qid);
525 break;
526 }
527 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
528 &rx_info->ena_buf,
529 req_id);
530 if (unlikely(rc)) {
531 netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
532 "failed to add buffer for rx queue %d\n",
533 rx_ring->qid);
534 break;
535 }
536 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
537 rx_ring->ring_size);
538 }
539
540 if (unlikely(i < num)) {
541 u64_stats_update_begin(&rx_ring->syncp);
542 rx_ring->rx_stats.refil_partial++;
543 u64_stats_update_end(&rx_ring->syncp);
544 netdev_warn(rx_ring->netdev,
545 "refilled rx qid %d with only %d buffers (from %d)\n",
546 rx_ring->qid, i, num);
547 }
548
549 if (likely(i)) {
550 /* Add memory barrier to make sure the desc were written before
551 * issue a doorbell
552 */
553 wmb();
554 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
555 }
556
557 rx_ring->next_to_use = next_to_use;
558
559 return i;
560 }
561
562 static void ena_free_rx_bufs(struct ena_adapter *adapter,
563 u32 qid)
564 {
565 struct ena_ring *rx_ring = &adapter->rx_ring[qid];
566 u32 i;
567
568 for (i = 0; i < rx_ring->ring_size; i++) {
569 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
570
571 if (rx_info->page)
572 ena_free_rx_page(rx_ring, rx_info);
573 }
574 }
575
576 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
577 * @adapter: board private structure
578 *
579 */
580 static void ena_refill_all_rx_bufs(struct ena_adapter *adapter)
581 {
582 struct ena_ring *rx_ring;
583 int i, rc, bufs_num;
584
585 for (i = 0; i < adapter->num_queues; i++) {
586 rx_ring = &adapter->rx_ring[i];
587 bufs_num = rx_ring->ring_size - 1;
588 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
589
590 if (unlikely(rc != bufs_num))
591 netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
592 "refilling Queue %d failed. allocated %d buffers from: %d\n",
593 i, rc, bufs_num);
594 }
595 }
596
597 static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
598 {
599 int i;
600
601 for (i = 0; i < adapter->num_queues; i++)
602 ena_free_rx_bufs(adapter, i);
603 }
604
605 /* ena_free_tx_bufs - Free Tx Buffers per Queue
606 * @tx_ring: TX ring for which buffers be freed
607 */
608 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
609 {
610 bool print_once = true;
611 u32 i;
612
613 for (i = 0; i < tx_ring->ring_size; i++) {
614 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
615 struct ena_com_buf *ena_buf;
616 int nr_frags;
617 int j;
618
619 if (!tx_info->skb)
620 continue;
621
622 if (print_once) {
623 netdev_notice(tx_ring->netdev,
624 "free uncompleted tx skb qid %d idx 0x%x\n",
625 tx_ring->qid, i);
626 print_once = false;
627 } else {
628 netdev_dbg(tx_ring->netdev,
629 "free uncompleted tx skb qid %d idx 0x%x\n",
630 tx_ring->qid, i);
631 }
632
633 ena_buf = tx_info->bufs;
634 dma_unmap_single(tx_ring->dev,
635 ena_buf->paddr,
636 ena_buf->len,
637 DMA_TO_DEVICE);
638
639 /* unmap remaining mapped pages */
640 nr_frags = tx_info->num_of_bufs - 1;
641 for (j = 0; j < nr_frags; j++) {
642 ena_buf++;
643 dma_unmap_page(tx_ring->dev,
644 ena_buf->paddr,
645 ena_buf->len,
646 DMA_TO_DEVICE);
647 }
648
649 dev_kfree_skb_any(tx_info->skb);
650 }
651 netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,
652 tx_ring->qid));
653 }
654
655 static void ena_free_all_tx_bufs(struct ena_adapter *adapter)
656 {
657 struct ena_ring *tx_ring;
658 int i;
659
660 for (i = 0; i < adapter->num_queues; i++) {
661 tx_ring = &adapter->tx_ring[i];
662 ena_free_tx_bufs(tx_ring);
663 }
664 }
665
666 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter)
667 {
668 u16 ena_qid;
669 int i;
670
671 for (i = 0; i < adapter->num_queues; i++) {
672 ena_qid = ENA_IO_TXQ_IDX(i);
673 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
674 }
675 }
676
677 static void ena_destroy_all_rx_queues(struct ena_adapter *adapter)
678 {
679 u16 ena_qid;
680 int i;
681
682 for (i = 0; i < adapter->num_queues; i++) {
683 ena_qid = ENA_IO_RXQ_IDX(i);
684 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
685 }
686 }
687
688 static void ena_destroy_all_io_queues(struct ena_adapter *adapter)
689 {
690 ena_destroy_all_tx_queues(adapter);
691 ena_destroy_all_rx_queues(adapter);
692 }
693
694 static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
695 {
696 struct ena_tx_buffer *tx_info = NULL;
697
698 if (likely(req_id < tx_ring->ring_size)) {
699 tx_info = &tx_ring->tx_buffer_info[req_id];
700 if (likely(tx_info->skb))
701 return 0;
702 }
703
704 if (tx_info)
705 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
706 "tx_info doesn't have valid skb\n");
707 else
708 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
709 "Invalid req_id: %hu\n", req_id);
710
711 u64_stats_update_begin(&tx_ring->syncp);
712 tx_ring->tx_stats.bad_req_id++;
713 u64_stats_update_end(&tx_ring->syncp);
714
715 /* Trigger device reset */
716 tx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
717 set_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags);
718 return -EFAULT;
719 }
720
721 static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
722 {
723 struct netdev_queue *txq;
724 bool above_thresh;
725 u32 tx_bytes = 0;
726 u32 total_done = 0;
727 u16 next_to_clean;
728 u16 req_id;
729 int tx_pkts = 0;
730 int rc;
731
732 next_to_clean = tx_ring->next_to_clean;
733 txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->qid);
734
735 while (tx_pkts < budget) {
736 struct ena_tx_buffer *tx_info;
737 struct sk_buff *skb;
738 struct ena_com_buf *ena_buf;
739 int i, nr_frags;
740
741 rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
742 &req_id);
743 if (rc)
744 break;
745
746 rc = validate_tx_req_id(tx_ring, req_id);
747 if (rc)
748 break;
749
750 tx_info = &tx_ring->tx_buffer_info[req_id];
751 skb = tx_info->skb;
752
753 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
754 prefetch(&skb->end);
755
756 tx_info->skb = NULL;
757 tx_info->last_jiffies = 0;
758
759 if (likely(tx_info->num_of_bufs != 0)) {
760 ena_buf = tx_info->bufs;
761
762 dma_unmap_single(tx_ring->dev,
763 dma_unmap_addr(ena_buf, paddr),
764 dma_unmap_len(ena_buf, len),
765 DMA_TO_DEVICE);
766
767 /* unmap remaining mapped pages */
768 nr_frags = tx_info->num_of_bufs - 1;
769 for (i = 0; i < nr_frags; i++) {
770 ena_buf++;
771 dma_unmap_page(tx_ring->dev,
772 dma_unmap_addr(ena_buf, paddr),
773 dma_unmap_len(ena_buf, len),
774 DMA_TO_DEVICE);
775 }
776 }
777
778 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
779 "tx_poll: q %d skb %p completed\n", tx_ring->qid,
780 skb);
781
782 tx_bytes += skb->len;
783 dev_kfree_skb(skb);
784 tx_pkts++;
785 total_done += tx_info->tx_descs;
786
787 tx_ring->free_tx_ids[next_to_clean] = req_id;
788 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
789 tx_ring->ring_size);
790 }
791
792 tx_ring->next_to_clean = next_to_clean;
793 ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
794 ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
795
796 netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
797
798 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
799 "tx_poll: q %d done. total pkts: %d\n",
800 tx_ring->qid, tx_pkts);
801
802 /* need to make the rings circular update visible to
803 * ena_start_xmit() before checking for netif_queue_stopped().
804 */
805 smp_mb();
806
807 above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
808 ENA_TX_WAKEUP_THRESH;
809 if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
810 __netif_tx_lock(txq, smp_processor_id());
811 above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
812 ENA_TX_WAKEUP_THRESH;
813 if (netif_tx_queue_stopped(txq) && above_thresh) {
814 netif_tx_wake_queue(txq);
815 u64_stats_update_begin(&tx_ring->syncp);
816 tx_ring->tx_stats.queue_wakeup++;
817 u64_stats_update_end(&tx_ring->syncp);
818 }
819 __netif_tx_unlock(txq);
820 }
821
822 tx_ring->per_napi_bytes += tx_bytes;
823 tx_ring->per_napi_packets += tx_pkts;
824
825 return tx_pkts;
826 }
827
828 static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, bool frags)
829 {
830 struct sk_buff *skb;
831
832 if (frags)
833 skb = napi_get_frags(rx_ring->napi);
834 else
835 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
836 rx_ring->rx_copybreak);
837
838 if (unlikely(!skb)) {
839 u64_stats_update_begin(&rx_ring->syncp);
840 rx_ring->rx_stats.skb_alloc_fail++;
841 u64_stats_update_end(&rx_ring->syncp);
842 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
843 "Failed to allocate skb. frags: %d\n", frags);
844 return NULL;
845 }
846
847 return skb;
848 }
849
850 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
851 struct ena_com_rx_buf_info *ena_bufs,
852 u32 descs,
853 u16 *next_to_clean)
854 {
855 struct sk_buff *skb;
856 struct ena_rx_buffer *rx_info;
857 u16 len, req_id, buf = 0;
858 void *va;
859
860 len = ena_bufs[buf].len;
861 req_id = ena_bufs[buf].req_id;
862 rx_info = &rx_ring->rx_buffer_info[req_id];
863
864 if (unlikely(!rx_info->page)) {
865 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
866 "Page is NULL\n");
867 return NULL;
868 }
869
870 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
871 "rx_info %p page %p\n",
872 rx_info, rx_info->page);
873
874 /* save virt address of first buffer */
875 va = page_address(rx_info->page) + rx_info->page_offset;
876 prefetch(va + NET_IP_ALIGN);
877
878 if (len <= rx_ring->rx_copybreak) {
879 skb = ena_alloc_skb(rx_ring, false);
880 if (unlikely(!skb))
881 return NULL;
882
883 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
884 "rx allocated small packet. len %d. data_len %d\n",
885 skb->len, skb->data_len);
886
887 /* sync this buffer for CPU use */
888 dma_sync_single_for_cpu(rx_ring->dev,
889 dma_unmap_addr(&rx_info->ena_buf, paddr),
890 len,
891 DMA_FROM_DEVICE);
892 skb_copy_to_linear_data(skb, va, len);
893 dma_sync_single_for_device(rx_ring->dev,
894 dma_unmap_addr(&rx_info->ena_buf, paddr),
895 len,
896 DMA_FROM_DEVICE);
897
898 skb_put(skb, len);
899 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
900 rx_ring->free_rx_ids[*next_to_clean] = req_id;
901 *next_to_clean = ENA_RX_RING_IDX_ADD(*next_to_clean, descs,
902 rx_ring->ring_size);
903 return skb;
904 }
905
906 skb = ena_alloc_skb(rx_ring, true);
907 if (unlikely(!skb))
908 return NULL;
909
910 do {
911 dma_unmap_page(rx_ring->dev,
912 dma_unmap_addr(&rx_info->ena_buf, paddr),
913 PAGE_SIZE, DMA_FROM_DEVICE);
914
915 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
916 rx_info->page_offset, len, PAGE_SIZE);
917
918 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
919 "rx skb updated. len %d. data_len %d\n",
920 skb->len, skb->data_len);
921
922 rx_info->page = NULL;
923
924 rx_ring->free_rx_ids[*next_to_clean] = req_id;
925 *next_to_clean =
926 ENA_RX_RING_IDX_NEXT(*next_to_clean,
927 rx_ring->ring_size);
928 if (likely(--descs == 0))
929 break;
930
931 buf++;
932 len = ena_bufs[buf].len;
933 req_id = ena_bufs[buf].req_id;
934 rx_info = &rx_ring->rx_buffer_info[req_id];
935 } while (1);
936
937 return skb;
938 }
939
940 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
941 * @adapter: structure containing adapter specific data
942 * @ena_rx_ctx: received packet context/metadata
943 * @skb: skb currently being received and modified
944 */
945 static inline void ena_rx_checksum(struct ena_ring *rx_ring,
946 struct ena_com_rx_ctx *ena_rx_ctx,
947 struct sk_buff *skb)
948 {
949 /* Rx csum disabled */
950 if (unlikely(!(rx_ring->netdev->features & NETIF_F_RXCSUM))) {
951 skb->ip_summed = CHECKSUM_NONE;
952 return;
953 }
954
955 /* For fragmented packets the checksum isn't valid */
956 if (ena_rx_ctx->frag) {
957 skb->ip_summed = CHECKSUM_NONE;
958 return;
959 }
960
961 /* if IP and error */
962 if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
963 (ena_rx_ctx->l3_csum_err))) {
964 /* ipv4 checksum error */
965 skb->ip_summed = CHECKSUM_NONE;
966 u64_stats_update_begin(&rx_ring->syncp);
967 rx_ring->rx_stats.bad_csum++;
968 u64_stats_update_end(&rx_ring->syncp);
969 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
970 "RX IPv4 header checksum error\n");
971 return;
972 }
973
974 /* if TCP/UDP */
975 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
976 (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP))) {
977 if (unlikely(ena_rx_ctx->l4_csum_err)) {
978 /* TCP/UDP checksum error */
979 u64_stats_update_begin(&rx_ring->syncp);
980 rx_ring->rx_stats.bad_csum++;
981 u64_stats_update_end(&rx_ring->syncp);
982 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
983 "RX L4 checksum error\n");
984 skb->ip_summed = CHECKSUM_NONE;
985 return;
986 }
987
988 skb->ip_summed = CHECKSUM_UNNECESSARY;
989 }
990 }
991
992 static void ena_set_rx_hash(struct ena_ring *rx_ring,
993 struct ena_com_rx_ctx *ena_rx_ctx,
994 struct sk_buff *skb)
995 {
996 enum pkt_hash_types hash_type;
997
998 if (likely(rx_ring->netdev->features & NETIF_F_RXHASH)) {
999 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1000 (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)))
1001
1002 hash_type = PKT_HASH_TYPE_L4;
1003 else
1004 hash_type = PKT_HASH_TYPE_NONE;
1005
1006 /* Override hash type if the packet is fragmented */
1007 if (ena_rx_ctx->frag)
1008 hash_type = PKT_HASH_TYPE_NONE;
1009
1010 skb_set_hash(skb, ena_rx_ctx->hash, hash_type);
1011 }
1012 }
1013
1014 /* ena_clean_rx_irq - Cleanup RX irq
1015 * @rx_ring: RX ring to clean
1016 * @napi: napi handler
1017 * @budget: how many packets driver is allowed to clean
1018 *
1019 * Returns the number of cleaned buffers.
1020 */
1021 static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
1022 u32 budget)
1023 {
1024 u16 next_to_clean = rx_ring->next_to_clean;
1025 u32 res_budget, work_done;
1026
1027 struct ena_com_rx_ctx ena_rx_ctx;
1028 struct ena_adapter *adapter;
1029 struct sk_buff *skb;
1030 int refill_required;
1031 int refill_threshold;
1032 int rc = 0;
1033 int total_len = 0;
1034 int rx_copybreak_pkt = 0;
1035 int i;
1036
1037 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1038 "%s qid %d\n", __func__, rx_ring->qid);
1039 res_budget = budget;
1040
1041 do {
1042 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1043 ena_rx_ctx.max_bufs = rx_ring->sgl_size;
1044 ena_rx_ctx.descs = 0;
1045 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
1046 rx_ring->ena_com_io_sq,
1047 &ena_rx_ctx);
1048 if (unlikely(rc))
1049 goto error;
1050
1051 if (unlikely(ena_rx_ctx.descs == 0))
1052 break;
1053
1054 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1055 "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
1056 rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
1057 ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
1058
1059 /* allocate skb and fill it */
1060 skb = ena_rx_skb(rx_ring, rx_ring->ena_bufs, ena_rx_ctx.descs,
1061 &next_to_clean);
1062
1063 /* exit if we failed to retrieve a buffer */
1064 if (unlikely(!skb)) {
1065 for (i = 0; i < ena_rx_ctx.descs; i++) {
1066 rx_ring->free_tx_ids[next_to_clean] =
1067 rx_ring->ena_bufs[i].req_id;
1068 next_to_clean =
1069 ENA_RX_RING_IDX_NEXT(next_to_clean,
1070 rx_ring->ring_size);
1071 }
1072 break;
1073 }
1074
1075 ena_rx_checksum(rx_ring, &ena_rx_ctx, skb);
1076
1077 ena_set_rx_hash(rx_ring, &ena_rx_ctx, skb);
1078
1079 skb_record_rx_queue(skb, rx_ring->qid);
1080
1081 if (rx_ring->ena_bufs[0].len <= rx_ring->rx_copybreak) {
1082 total_len += rx_ring->ena_bufs[0].len;
1083 rx_copybreak_pkt++;
1084 napi_gro_receive(napi, skb);
1085 } else {
1086 total_len += skb->len;
1087 napi_gro_frags(napi);
1088 }
1089
1090 res_budget--;
1091 } while (likely(res_budget));
1092
1093 work_done = budget - res_budget;
1094 rx_ring->per_napi_bytes += total_len;
1095 rx_ring->per_napi_packets += work_done;
1096 u64_stats_update_begin(&rx_ring->syncp);
1097 rx_ring->rx_stats.bytes += total_len;
1098 rx_ring->rx_stats.cnt += work_done;
1099 rx_ring->rx_stats.rx_copybreak_pkt += rx_copybreak_pkt;
1100 u64_stats_update_end(&rx_ring->syncp);
1101
1102 rx_ring->next_to_clean = next_to_clean;
1103
1104 refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
1105 refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
1106
1107 /* Optimization, try to batch new rx buffers */
1108 if (refill_required > refill_threshold) {
1109 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1110 ena_refill_rx_bufs(rx_ring, refill_required);
1111 }
1112
1113 return work_done;
1114
1115 error:
1116 adapter = netdev_priv(rx_ring->netdev);
1117
1118 u64_stats_update_begin(&rx_ring->syncp);
1119 rx_ring->rx_stats.bad_desc_num++;
1120 u64_stats_update_end(&rx_ring->syncp);
1121
1122 /* Too many desc from the device. Trigger reset */
1123 adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
1124 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
1125
1126 return 0;
1127 }
1128
1129 inline void ena_adjust_intr_moderation(struct ena_ring *rx_ring,
1130 struct ena_ring *tx_ring)
1131 {
1132 /* We apply adaptive moderation on Rx path only.
1133 * Tx uses static interrupt moderation.
1134 */
1135 ena_com_calculate_interrupt_delay(rx_ring->ena_dev,
1136 rx_ring->per_napi_packets,
1137 rx_ring->per_napi_bytes,
1138 &rx_ring->smoothed_interval,
1139 &rx_ring->moder_tbl_idx);
1140
1141 /* Reset per napi packets/bytes */
1142 tx_ring->per_napi_packets = 0;
1143 tx_ring->per_napi_bytes = 0;
1144 rx_ring->per_napi_packets = 0;
1145 rx_ring->per_napi_bytes = 0;
1146 }
1147
1148 static inline void ena_unmask_interrupt(struct ena_ring *tx_ring,
1149 struct ena_ring *rx_ring)
1150 {
1151 struct ena_eth_io_intr_reg intr_reg;
1152
1153 /* Update intr register: rx intr delay,
1154 * tx intr delay and interrupt unmask
1155 */
1156 ena_com_update_intr_reg(&intr_reg,
1157 rx_ring->smoothed_interval,
1158 tx_ring->smoothed_interval,
1159 true);
1160
1161 /* It is a shared MSI-X.
1162 * Tx and Rx CQ have pointer to it.
1163 * So we use one of them to reach the intr reg
1164 */
1165 ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg);
1166 }
1167
1168 static inline void ena_update_ring_numa_node(struct ena_ring *tx_ring,
1169 struct ena_ring *rx_ring)
1170 {
1171 int cpu = get_cpu();
1172 int numa_node;
1173
1174 /* Check only one ring since the 2 rings are running on the same cpu */
1175 if (likely(tx_ring->cpu == cpu))
1176 goto out;
1177
1178 numa_node = cpu_to_node(cpu);
1179 put_cpu();
1180
1181 if (numa_node != NUMA_NO_NODE) {
1182 ena_com_update_numa_node(tx_ring->ena_com_io_cq, numa_node);
1183 ena_com_update_numa_node(rx_ring->ena_com_io_cq, numa_node);
1184 }
1185
1186 tx_ring->cpu = cpu;
1187 rx_ring->cpu = cpu;
1188
1189 return;
1190 out:
1191 put_cpu();
1192 }
1193
1194 static int ena_io_poll(struct napi_struct *napi, int budget)
1195 {
1196 struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
1197 struct ena_ring *tx_ring, *rx_ring;
1198
1199 u32 tx_work_done;
1200 u32 rx_work_done;
1201 int tx_budget;
1202 int napi_comp_call = 0;
1203 int ret;
1204
1205 tx_ring = ena_napi->tx_ring;
1206 rx_ring = ena_napi->rx_ring;
1207
1208 tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
1209
1210 if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1211 test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
1212 napi_complete_done(napi, 0);
1213 return 0;
1214 }
1215
1216 tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
1217 rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
1218
1219 /* If the device is about to reset or down, avoid unmask
1220 * the interrupt and return 0 so NAPI won't reschedule
1221 */
1222 if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1223 test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
1224 napi_complete_done(napi, 0);
1225 ret = 0;
1226
1227 } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
1228 napi_comp_call = 1;
1229
1230 /* Update numa and unmask the interrupt only when schedule
1231 * from the interrupt context (vs from sk_busy_loop)
1232 */
1233 if (napi_complete_done(napi, rx_work_done)) {
1234 /* Tx and Rx share the same interrupt vector */
1235 if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
1236 ena_adjust_intr_moderation(rx_ring, tx_ring);
1237
1238 ena_unmask_interrupt(tx_ring, rx_ring);
1239 }
1240
1241 ena_update_ring_numa_node(tx_ring, rx_ring);
1242
1243 ret = rx_work_done;
1244 } else {
1245 ret = budget;
1246 }
1247
1248 u64_stats_update_begin(&tx_ring->syncp);
1249 tx_ring->tx_stats.napi_comp += napi_comp_call;
1250 tx_ring->tx_stats.tx_poll++;
1251 u64_stats_update_end(&tx_ring->syncp);
1252
1253 return ret;
1254 }
1255
1256 static irqreturn_t ena_intr_msix_mgmnt(int irq, void *data)
1257 {
1258 struct ena_adapter *adapter = (struct ena_adapter *)data;
1259
1260 ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1261
1262 /* Don't call the aenq handler before probe is done */
1263 if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags)))
1264 ena_com_aenq_intr_handler(adapter->ena_dev, data);
1265
1266 return IRQ_HANDLED;
1267 }
1268
1269 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1270 * @irq: interrupt number
1271 * @data: pointer to a network interface private napi device structure
1272 */
1273 static irqreturn_t ena_intr_msix_io(int irq, void *data)
1274 {
1275 struct ena_napi *ena_napi = data;
1276
1277 napi_schedule_irqoff(&ena_napi->napi);
1278
1279 return IRQ_HANDLED;
1280 }
1281
1282 /* Reserve a single MSI-X vector for management (admin + aenq).
1283 * plus reserve one vector for each potential io queue.
1284 * the number of potential io queues is the minimum of what the device
1285 * supports and the number of vCPUs.
1286 */
1287 static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
1288 {
1289 int msix_vecs, irq_cnt;
1290
1291 if (test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1292 netif_err(adapter, probe, adapter->netdev,
1293 "Error, MSI-X is already enabled\n");
1294 return -EPERM;
1295 }
1296
1297 /* Reserved the max msix vectors we might need */
1298 msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
1299
1300 netif_dbg(adapter, probe, adapter->netdev,
1301 "trying to enable MSI-X, vectors %d\n", msix_vecs);
1302
1303 irq_cnt = pci_alloc_irq_vectors(adapter->pdev, ENA_MIN_MSIX_VEC,
1304 msix_vecs, PCI_IRQ_MSIX);
1305
1306 if (irq_cnt < 0) {
1307 netif_err(adapter, probe, adapter->netdev,
1308 "Failed to enable MSI-X. irq_cnt %d\n", irq_cnt);
1309 return -ENOSPC;
1310 }
1311
1312 if (irq_cnt != msix_vecs) {
1313 netif_notice(adapter, probe, adapter->netdev,
1314 "enable only %d MSI-X (out of %d), reduce the number of queues\n",
1315 irq_cnt, msix_vecs);
1316 adapter->num_queues = irq_cnt - ENA_ADMIN_MSIX_VEC;
1317 }
1318
1319 if (ena_init_rx_cpu_rmap(adapter))
1320 netif_warn(adapter, probe, adapter->netdev,
1321 "Failed to map IRQs to CPUs\n");
1322
1323 adapter->msix_vecs = irq_cnt;
1324 set_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags);
1325
1326 return 0;
1327 }
1328
1329 static void ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1330 {
1331 u32 cpu;
1332
1333 snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
1334 ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
1335 pci_name(adapter->pdev));
1336 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler =
1337 ena_intr_msix_mgmnt;
1338 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1339 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1340 pci_irq_vector(adapter->pdev, ENA_MGMNT_IRQ_IDX);
1341 cpu = cpumask_first(cpu_online_mask);
1342 adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].cpu = cpu;
1343 cpumask_set_cpu(cpu,
1344 &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].affinity_hint_mask);
1345 }
1346
1347 static void ena_setup_io_intr(struct ena_adapter *adapter)
1348 {
1349 struct net_device *netdev;
1350 int irq_idx, i, cpu;
1351
1352 netdev = adapter->netdev;
1353
1354 for (i = 0; i < adapter->num_queues; i++) {
1355 irq_idx = ENA_IO_IRQ_IDX(i);
1356 cpu = i % num_online_cpus();
1357
1358 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1359 "%s-Tx-Rx-%d", netdev->name, i);
1360 adapter->irq_tbl[irq_idx].handler = ena_intr_msix_io;
1361 adapter->irq_tbl[irq_idx].data = &adapter->ena_napi[i];
1362 adapter->irq_tbl[irq_idx].vector =
1363 pci_irq_vector(adapter->pdev, irq_idx);
1364 adapter->irq_tbl[irq_idx].cpu = cpu;
1365
1366 cpumask_set_cpu(cpu,
1367 &adapter->irq_tbl[irq_idx].affinity_hint_mask);
1368 }
1369 }
1370
1371 static int ena_request_mgmnt_irq(struct ena_adapter *adapter)
1372 {
1373 unsigned long flags = 0;
1374 struct ena_irq *irq;
1375 int rc;
1376
1377 irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1378 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1379 irq->data);
1380 if (rc) {
1381 netif_err(adapter, probe, adapter->netdev,
1382 "failed to request admin irq\n");
1383 return rc;
1384 }
1385
1386 netif_dbg(adapter, probe, adapter->netdev,
1387 "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1388 irq->affinity_hint_mask.bits[0], irq->vector);
1389
1390 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1391
1392 return rc;
1393 }
1394
1395 static int ena_request_io_irq(struct ena_adapter *adapter)
1396 {
1397 unsigned long flags = 0;
1398 struct ena_irq *irq;
1399 int rc = 0, i, k;
1400
1401 if (!test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1402 netif_err(adapter, ifup, adapter->netdev,
1403 "Failed to request I/O IRQ: MSI-X is not enabled\n");
1404 return -EINVAL;
1405 }
1406
1407 for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1408 irq = &adapter->irq_tbl[i];
1409 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1410 irq->data);
1411 if (rc) {
1412 netif_err(adapter, ifup, adapter->netdev,
1413 "Failed to request I/O IRQ. index %d rc %d\n",
1414 i, rc);
1415 goto err;
1416 }
1417
1418 netif_dbg(adapter, ifup, adapter->netdev,
1419 "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1420 i, irq->affinity_hint_mask.bits[0], irq->vector);
1421
1422 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1423 }
1424
1425 return rc;
1426
1427 err:
1428 for (k = ENA_IO_IRQ_FIRST_IDX; k < i; k++) {
1429 irq = &adapter->irq_tbl[k];
1430 free_irq(irq->vector, irq->data);
1431 }
1432
1433 return rc;
1434 }
1435
1436 static void ena_free_mgmnt_irq(struct ena_adapter *adapter)
1437 {
1438 struct ena_irq *irq;
1439
1440 irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1441 synchronize_irq(irq->vector);
1442 irq_set_affinity_hint(irq->vector, NULL);
1443 free_irq(irq->vector, irq->data);
1444 }
1445
1446 static void ena_free_io_irq(struct ena_adapter *adapter)
1447 {
1448 struct ena_irq *irq;
1449 int i;
1450
1451 #ifdef CONFIG_RFS_ACCEL
1452 if (adapter->msix_vecs >= 1) {
1453 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
1454 adapter->netdev->rx_cpu_rmap = NULL;
1455 }
1456 #endif /* CONFIG_RFS_ACCEL */
1457
1458 for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1459 irq = &adapter->irq_tbl[i];
1460 irq_set_affinity_hint(irq->vector, NULL);
1461 free_irq(irq->vector, irq->data);
1462 }
1463 }
1464
1465 static void ena_disable_msix(struct ena_adapter *adapter)
1466 {
1467 if (test_and_clear_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags))
1468 pci_free_irq_vectors(adapter->pdev);
1469 }
1470
1471 static void ena_disable_io_intr_sync(struct ena_adapter *adapter)
1472 {
1473 int i;
1474
1475 if (!netif_running(adapter->netdev))
1476 return;
1477
1478 for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++)
1479 synchronize_irq(adapter->irq_tbl[i].vector);
1480 }
1481
1482 static void ena_del_napi(struct ena_adapter *adapter)
1483 {
1484 int i;
1485
1486 for (i = 0; i < adapter->num_queues; i++)
1487 netif_napi_del(&adapter->ena_napi[i].napi);
1488 }
1489
1490 static void ena_init_napi(struct ena_adapter *adapter)
1491 {
1492 struct ena_napi *napi;
1493 int i;
1494
1495 for (i = 0; i < adapter->num_queues; i++) {
1496 napi = &adapter->ena_napi[i];
1497
1498 netif_napi_add(adapter->netdev,
1499 &adapter->ena_napi[i].napi,
1500 ena_io_poll,
1501 ENA_NAPI_BUDGET);
1502 napi->rx_ring = &adapter->rx_ring[i];
1503 napi->tx_ring = &adapter->tx_ring[i];
1504 napi->qid = i;
1505 }
1506 }
1507
1508 static void ena_napi_disable_all(struct ena_adapter *adapter)
1509 {
1510 int i;
1511
1512 for (i = 0; i < adapter->num_queues; i++)
1513 napi_disable(&adapter->ena_napi[i].napi);
1514 }
1515
1516 static void ena_napi_enable_all(struct ena_adapter *adapter)
1517 {
1518 int i;
1519
1520 for (i = 0; i < adapter->num_queues; i++)
1521 napi_enable(&adapter->ena_napi[i].napi);
1522 }
1523
1524 static void ena_restore_ethtool_params(struct ena_adapter *adapter)
1525 {
1526 adapter->tx_usecs = 0;
1527 adapter->rx_usecs = 0;
1528 adapter->tx_frames = 1;
1529 adapter->rx_frames = 1;
1530 }
1531
1532 /* Configure the Rx forwarding */
1533 static int ena_rss_configure(struct ena_adapter *adapter)
1534 {
1535 struct ena_com_dev *ena_dev = adapter->ena_dev;
1536 int rc;
1537
1538 /* In case the RSS table wasn't initialized by probe */
1539 if (!ena_dev->rss.tbl_log_size) {
1540 rc = ena_rss_init_default(adapter);
1541 if (rc && (rc != -EOPNOTSUPP)) {
1542 netif_err(adapter, ifup, adapter->netdev,
1543 "Failed to init RSS rc: %d\n", rc);
1544 return rc;
1545 }
1546 }
1547
1548 /* Set indirect table */
1549 rc = ena_com_indirect_table_set(ena_dev);
1550 if (unlikely(rc && rc != -EOPNOTSUPP))
1551 return rc;
1552
1553 /* Configure hash function (if supported) */
1554 rc = ena_com_set_hash_function(ena_dev);
1555 if (unlikely(rc && (rc != -EOPNOTSUPP)))
1556 return rc;
1557
1558 /* Configure hash inputs (if supported) */
1559 rc = ena_com_set_hash_ctrl(ena_dev);
1560 if (unlikely(rc && (rc != -EOPNOTSUPP)))
1561 return rc;
1562
1563 return 0;
1564 }
1565
1566 static int ena_up_complete(struct ena_adapter *adapter)
1567 {
1568 int rc;
1569
1570 rc = ena_rss_configure(adapter);
1571 if (rc)
1572 return rc;
1573
1574 ena_init_napi(adapter);
1575
1576 ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
1577
1578 ena_refill_all_rx_bufs(adapter);
1579
1580 /* enable transmits */
1581 netif_tx_start_all_queues(adapter->netdev);
1582
1583 ena_restore_ethtool_params(adapter);
1584
1585 ena_napi_enable_all(adapter);
1586
1587 return 0;
1588 }
1589
1590 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
1591 {
1592 struct ena_com_create_io_ctx ctx = { 0 };
1593 struct ena_com_dev *ena_dev;
1594 struct ena_ring *tx_ring;
1595 u32 msix_vector;
1596 u16 ena_qid;
1597 int rc;
1598
1599 ena_dev = adapter->ena_dev;
1600
1601 tx_ring = &adapter->tx_ring[qid];
1602 msix_vector = ENA_IO_IRQ_IDX(qid);
1603 ena_qid = ENA_IO_TXQ_IDX(qid);
1604
1605 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1606 ctx.qid = ena_qid;
1607 ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1608 ctx.msix_vector = msix_vector;
1609 ctx.queue_size = adapter->tx_ring_size;
1610 ctx.numa_node = cpu_to_node(tx_ring->cpu);
1611
1612 rc = ena_com_create_io_queue(ena_dev, &ctx);
1613 if (rc) {
1614 netif_err(adapter, ifup, adapter->netdev,
1615 "Failed to create I/O TX queue num %d rc: %d\n",
1616 qid, rc);
1617 return rc;
1618 }
1619
1620 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1621 &tx_ring->ena_com_io_sq,
1622 &tx_ring->ena_com_io_cq);
1623 if (rc) {
1624 netif_err(adapter, ifup, adapter->netdev,
1625 "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1626 qid, rc);
1627 ena_com_destroy_io_queue(ena_dev, ena_qid);
1628 return rc;
1629 }
1630
1631 ena_com_update_numa_node(tx_ring->ena_com_io_cq, ctx.numa_node);
1632 return rc;
1633 }
1634
1635 static int ena_create_all_io_tx_queues(struct ena_adapter *adapter)
1636 {
1637 struct ena_com_dev *ena_dev = adapter->ena_dev;
1638 int rc, i;
1639
1640 for (i = 0; i < adapter->num_queues; i++) {
1641 rc = ena_create_io_tx_queue(adapter, i);
1642 if (rc)
1643 goto create_err;
1644 }
1645
1646 return 0;
1647
1648 create_err:
1649 while (i--)
1650 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1651
1652 return rc;
1653 }
1654
1655 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
1656 {
1657 struct ena_com_dev *ena_dev;
1658 struct ena_com_create_io_ctx ctx = { 0 };
1659 struct ena_ring *rx_ring;
1660 u32 msix_vector;
1661 u16 ena_qid;
1662 int rc;
1663
1664 ena_dev = adapter->ena_dev;
1665
1666 rx_ring = &adapter->rx_ring[qid];
1667 msix_vector = ENA_IO_IRQ_IDX(qid);
1668 ena_qid = ENA_IO_RXQ_IDX(qid);
1669
1670 ctx.qid = ena_qid;
1671 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1672 ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1673 ctx.msix_vector = msix_vector;
1674 ctx.queue_size = adapter->rx_ring_size;
1675 ctx.numa_node = cpu_to_node(rx_ring->cpu);
1676
1677 rc = ena_com_create_io_queue(ena_dev, &ctx);
1678 if (rc) {
1679 netif_err(adapter, ifup, adapter->netdev,
1680 "Failed to create I/O RX queue num %d rc: %d\n",
1681 qid, rc);
1682 return rc;
1683 }
1684
1685 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1686 &rx_ring->ena_com_io_sq,
1687 &rx_ring->ena_com_io_cq);
1688 if (rc) {
1689 netif_err(adapter, ifup, adapter->netdev,
1690 "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1691 qid, rc);
1692 ena_com_destroy_io_queue(ena_dev, ena_qid);
1693 return rc;
1694 }
1695
1696 ena_com_update_numa_node(rx_ring->ena_com_io_cq, ctx.numa_node);
1697
1698 return rc;
1699 }
1700
1701 static int ena_create_all_io_rx_queues(struct ena_adapter *adapter)
1702 {
1703 struct ena_com_dev *ena_dev = adapter->ena_dev;
1704 int rc, i;
1705
1706 for (i = 0; i < adapter->num_queues; i++) {
1707 rc = ena_create_io_rx_queue(adapter, i);
1708 if (rc)
1709 goto create_err;
1710 }
1711
1712 return 0;
1713
1714 create_err:
1715 while (i--)
1716 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1717
1718 return rc;
1719 }
1720
1721 static int ena_up(struct ena_adapter *adapter)
1722 {
1723 int rc, i;
1724
1725 netdev_dbg(adapter->netdev, "%s\n", __func__);
1726
1727 ena_setup_io_intr(adapter);
1728
1729 rc = ena_request_io_irq(adapter);
1730 if (rc)
1731 goto err_req_irq;
1732
1733 /* allocate transmit descriptors */
1734 rc = ena_setup_all_tx_resources(adapter);
1735 if (rc)
1736 goto err_setup_tx;
1737
1738 /* allocate receive descriptors */
1739 rc = ena_setup_all_rx_resources(adapter);
1740 if (rc)
1741 goto err_setup_rx;
1742
1743 /* Create TX queues */
1744 rc = ena_create_all_io_tx_queues(adapter);
1745 if (rc)
1746 goto err_create_tx_queues;
1747
1748 /* Create RX queues */
1749 rc = ena_create_all_io_rx_queues(adapter);
1750 if (rc)
1751 goto err_create_rx_queues;
1752
1753 rc = ena_up_complete(adapter);
1754 if (rc)
1755 goto err_up;
1756
1757 if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
1758 netif_carrier_on(adapter->netdev);
1759
1760 u64_stats_update_begin(&adapter->syncp);
1761 adapter->dev_stats.interface_up++;
1762 u64_stats_update_end(&adapter->syncp);
1763
1764 set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1765
1766 /* Enable completion queues interrupt */
1767 for (i = 0; i < adapter->num_queues; i++)
1768 ena_unmask_interrupt(&adapter->tx_ring[i],
1769 &adapter->rx_ring[i]);
1770
1771 /* schedule napi in case we had pending packets
1772 * from the last time we disable napi
1773 */
1774 for (i = 0; i < adapter->num_queues; i++)
1775 napi_schedule(&adapter->ena_napi[i].napi);
1776
1777 return rc;
1778
1779 err_up:
1780 ena_destroy_all_rx_queues(adapter);
1781 err_create_rx_queues:
1782 ena_destroy_all_tx_queues(adapter);
1783 err_create_tx_queues:
1784 ena_free_all_io_rx_resources(adapter);
1785 err_setup_rx:
1786 ena_free_all_io_tx_resources(adapter);
1787 err_setup_tx:
1788 ena_free_io_irq(adapter);
1789 err_req_irq:
1790
1791 return rc;
1792 }
1793
1794 static void ena_down(struct ena_adapter *adapter)
1795 {
1796 netif_info(adapter, ifdown, adapter->netdev, "%s\n", __func__);
1797
1798 clear_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1799
1800 u64_stats_update_begin(&adapter->syncp);
1801 adapter->dev_stats.interface_down++;
1802 u64_stats_update_end(&adapter->syncp);
1803
1804 netif_carrier_off(adapter->netdev);
1805 netif_tx_disable(adapter->netdev);
1806
1807 /* After this point the napi handler won't enable the tx queue */
1808 ena_napi_disable_all(adapter);
1809
1810 /* After destroy the queue there won't be any new interrupts */
1811
1812 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
1813 int rc;
1814
1815 rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
1816 if (rc)
1817 dev_err(&adapter->pdev->dev, "Device reset failed\n");
1818 }
1819
1820 ena_destroy_all_io_queues(adapter);
1821
1822 ena_disable_io_intr_sync(adapter);
1823 ena_free_io_irq(adapter);
1824 ena_del_napi(adapter);
1825
1826 ena_free_all_tx_bufs(adapter);
1827 ena_free_all_rx_bufs(adapter);
1828 ena_free_all_io_tx_resources(adapter);
1829 ena_free_all_io_rx_resources(adapter);
1830 }
1831
1832 /* ena_open - Called when a network interface is made active
1833 * @netdev: network interface device structure
1834 *
1835 * Returns 0 on success, negative value on failure
1836 *
1837 * The open entry point is called when a network interface is made
1838 * active by the system (IFF_UP). At this point all resources needed
1839 * for transmit and receive operations are allocated, the interrupt
1840 * handler is registered with the OS, the watchdog timer is started,
1841 * and the stack is notified that the interface is ready.
1842 */
1843 static int ena_open(struct net_device *netdev)
1844 {
1845 struct ena_adapter *adapter = netdev_priv(netdev);
1846 int rc;
1847
1848 /* Notify the stack of the actual queue counts. */
1849 rc = netif_set_real_num_tx_queues(netdev, adapter->num_queues);
1850 if (rc) {
1851 netif_err(adapter, ifup, netdev, "Can't set num tx queues\n");
1852 return rc;
1853 }
1854
1855 rc = netif_set_real_num_rx_queues(netdev, adapter->num_queues);
1856 if (rc) {
1857 netif_err(adapter, ifup, netdev, "Can't set num rx queues\n");
1858 return rc;
1859 }
1860
1861 rc = ena_up(adapter);
1862 if (rc)
1863 return rc;
1864
1865 return rc;
1866 }
1867
1868 /* ena_close - Disables a network interface
1869 * @netdev: network interface device structure
1870 *
1871 * Returns 0, this is not allowed to fail
1872 *
1873 * The close entry point is called when an interface is de-activated
1874 * by the OS. The hardware is still under the drivers control, but
1875 * needs to be disabled. A global MAC reset is issued to stop the
1876 * hardware, and all transmit and receive resources are freed.
1877 */
1878 static int ena_close(struct net_device *netdev)
1879 {
1880 struct ena_adapter *adapter = netdev_priv(netdev);
1881
1882 netif_dbg(adapter, ifdown, netdev, "%s\n", __func__);
1883
1884 if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
1885 ena_down(adapter);
1886
1887 return 0;
1888 }
1889
1890 static void ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct sk_buff *skb)
1891 {
1892 u32 mss = skb_shinfo(skb)->gso_size;
1893 struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
1894 u8 l4_protocol = 0;
1895
1896 if ((skb->ip_summed == CHECKSUM_PARTIAL) || mss) {
1897 ena_tx_ctx->l4_csum_enable = 1;
1898 if (mss) {
1899 ena_tx_ctx->tso_enable = 1;
1900 ena_meta->l4_hdr_len = tcp_hdr(skb)->doff;
1901 ena_tx_ctx->l4_csum_partial = 0;
1902 } else {
1903 ena_tx_ctx->tso_enable = 0;
1904 ena_meta->l4_hdr_len = 0;
1905 ena_tx_ctx->l4_csum_partial = 1;
1906 }
1907
1908 switch (ip_hdr(skb)->version) {
1909 case IPVERSION:
1910 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
1911 if (ip_hdr(skb)->frag_off & htons(IP_DF))
1912 ena_tx_ctx->df = 1;
1913 if (mss)
1914 ena_tx_ctx->l3_csum_enable = 1;
1915 l4_protocol = ip_hdr(skb)->protocol;
1916 break;
1917 case 6:
1918 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
1919 l4_protocol = ipv6_hdr(skb)->nexthdr;
1920 break;
1921 default:
1922 break;
1923 }
1924
1925 if (l4_protocol == IPPROTO_TCP)
1926 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
1927 else
1928 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
1929
1930 ena_meta->mss = mss;
1931 ena_meta->l3_hdr_len = skb_network_header_len(skb);
1932 ena_meta->l3_hdr_offset = skb_network_offset(skb);
1933 ena_tx_ctx->meta_valid = 1;
1934
1935 } else {
1936 ena_tx_ctx->meta_valid = 0;
1937 }
1938 }
1939
1940 static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
1941 struct sk_buff *skb)
1942 {
1943 int num_frags, header_len, rc;
1944
1945 num_frags = skb_shinfo(skb)->nr_frags;
1946 header_len = skb_headlen(skb);
1947
1948 if (num_frags < tx_ring->sgl_size)
1949 return 0;
1950
1951 if ((num_frags == tx_ring->sgl_size) &&
1952 (header_len < tx_ring->tx_max_header_size))
1953 return 0;
1954
1955 u64_stats_update_begin(&tx_ring->syncp);
1956 tx_ring->tx_stats.linearize++;
1957 u64_stats_update_end(&tx_ring->syncp);
1958
1959 rc = skb_linearize(skb);
1960 if (unlikely(rc)) {
1961 u64_stats_update_begin(&tx_ring->syncp);
1962 tx_ring->tx_stats.linearize_failed++;
1963 u64_stats_update_end(&tx_ring->syncp);
1964 }
1965
1966 return rc;
1967 }
1968
1969 /* Called with netif_tx_lock. */
1970 static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
1971 {
1972 struct ena_adapter *adapter = netdev_priv(dev);
1973 struct ena_tx_buffer *tx_info;
1974 struct ena_com_tx_ctx ena_tx_ctx;
1975 struct ena_ring *tx_ring;
1976 struct netdev_queue *txq;
1977 struct ena_com_buf *ena_buf;
1978 void *push_hdr;
1979 u32 len, last_frag;
1980 u16 next_to_use;
1981 u16 req_id;
1982 u16 push_len;
1983 u16 header_len;
1984 dma_addr_t dma;
1985 int qid, rc, nb_hw_desc;
1986 int i = -1;
1987
1988 netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
1989 /* Determine which tx ring we will be placed on */
1990 qid = skb_get_queue_mapping(skb);
1991 tx_ring = &adapter->tx_ring[qid];
1992 txq = netdev_get_tx_queue(dev, qid);
1993
1994 rc = ena_check_and_linearize_skb(tx_ring, skb);
1995 if (unlikely(rc))
1996 goto error_drop_packet;
1997
1998 skb_tx_timestamp(skb);
1999 len = skb_headlen(skb);
2000
2001 next_to_use = tx_ring->next_to_use;
2002 req_id = tx_ring->free_tx_ids[next_to_use];
2003 tx_info = &tx_ring->tx_buffer_info[req_id];
2004 tx_info->num_of_bufs = 0;
2005
2006 WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
2007 ena_buf = tx_info->bufs;
2008 tx_info->skb = skb;
2009
2010 if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2011 /* prepared the push buffer */
2012 push_len = min_t(u32, len, tx_ring->tx_max_header_size);
2013 header_len = push_len;
2014 push_hdr = skb->data;
2015 } else {
2016 push_len = 0;
2017 header_len = min_t(u32, len, tx_ring->tx_max_header_size);
2018 push_hdr = NULL;
2019 }
2020
2021 netif_dbg(adapter, tx_queued, dev,
2022 "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
2023 push_hdr, push_len);
2024
2025 if (len > push_len) {
2026 dma = dma_map_single(tx_ring->dev, skb->data + push_len,
2027 len - push_len, DMA_TO_DEVICE);
2028 if (dma_mapping_error(tx_ring->dev, dma))
2029 goto error_report_dma_error;
2030
2031 ena_buf->paddr = dma;
2032 ena_buf->len = len - push_len;
2033
2034 ena_buf++;
2035 tx_info->num_of_bufs++;
2036 }
2037
2038 last_frag = skb_shinfo(skb)->nr_frags;
2039
2040 for (i = 0; i < last_frag; i++) {
2041 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2042
2043 len = skb_frag_size(frag);
2044 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
2045 DMA_TO_DEVICE);
2046 if (dma_mapping_error(tx_ring->dev, dma))
2047 goto error_report_dma_error;
2048
2049 ena_buf->paddr = dma;
2050 ena_buf->len = len;
2051 ena_buf++;
2052 }
2053
2054 tx_info->num_of_bufs += last_frag;
2055
2056 memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
2057 ena_tx_ctx.ena_bufs = tx_info->bufs;
2058 ena_tx_ctx.push_header = push_hdr;
2059 ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
2060 ena_tx_ctx.req_id = req_id;
2061 ena_tx_ctx.header_len = header_len;
2062
2063 /* set flags and meta data */
2064 ena_tx_csum(&ena_tx_ctx, skb);
2065
2066 /* prepare the packet's descriptors to dma engine */
2067 rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
2068 &nb_hw_desc);
2069
2070 if (unlikely(rc)) {
2071 netif_err(adapter, tx_queued, dev,
2072 "failed to prepare tx bufs\n");
2073 u64_stats_update_begin(&tx_ring->syncp);
2074 tx_ring->tx_stats.queue_stop++;
2075 tx_ring->tx_stats.prepare_ctx_err++;
2076 u64_stats_update_end(&tx_ring->syncp);
2077 netif_tx_stop_queue(txq);
2078 goto error_unmap_dma;
2079 }
2080
2081 netdev_tx_sent_queue(txq, skb->len);
2082
2083 u64_stats_update_begin(&tx_ring->syncp);
2084 tx_ring->tx_stats.cnt++;
2085 tx_ring->tx_stats.bytes += skb->len;
2086 u64_stats_update_end(&tx_ring->syncp);
2087
2088 tx_info->tx_descs = nb_hw_desc;
2089 tx_info->last_jiffies = jiffies;
2090 tx_info->print_once = 0;
2091
2092 tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
2093 tx_ring->ring_size);
2094
2095 /* This WMB is aimed to:
2096 * 1 - perform smp barrier before reading next_to_completion
2097 * 2 - make sure the desc were written before trigger DB
2098 */
2099 wmb();
2100
2101 /* stop the queue when no more space available, the packet can have up
2102 * to sgl_size + 2. one for the meta descriptor and one for header
2103 * (if the header is larger than tx_max_header_size).
2104 */
2105 if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
2106 (tx_ring->sgl_size + 2))) {
2107 netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
2108 __func__, qid);
2109
2110 netif_tx_stop_queue(txq);
2111 u64_stats_update_begin(&tx_ring->syncp);
2112 tx_ring->tx_stats.queue_stop++;
2113 u64_stats_update_end(&tx_ring->syncp);
2114
2115 /* There is a rare condition where this function decide to
2116 * stop the queue but meanwhile clean_tx_irq updates
2117 * next_to_completion and terminates.
2118 * The queue will remain stopped forever.
2119 * To solve this issue this function perform rmb, check
2120 * the wakeup condition and wake up the queue if needed.
2121 */
2122 smp_rmb();
2123
2124 if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
2125 > ENA_TX_WAKEUP_THRESH) {
2126 netif_tx_wake_queue(txq);
2127 u64_stats_update_begin(&tx_ring->syncp);
2128 tx_ring->tx_stats.queue_wakeup++;
2129 u64_stats_update_end(&tx_ring->syncp);
2130 }
2131 }
2132
2133 if (netif_xmit_stopped(txq) || !skb->xmit_more) {
2134 /* trigger the dma engine */
2135 ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
2136 u64_stats_update_begin(&tx_ring->syncp);
2137 tx_ring->tx_stats.doorbells++;
2138 u64_stats_update_end(&tx_ring->syncp);
2139 }
2140
2141 return NETDEV_TX_OK;
2142
2143 error_report_dma_error:
2144 u64_stats_update_begin(&tx_ring->syncp);
2145 tx_ring->tx_stats.dma_mapping_err++;
2146 u64_stats_update_end(&tx_ring->syncp);
2147 netdev_warn(adapter->netdev, "failed to map skb\n");
2148
2149 tx_info->skb = NULL;
2150
2151 error_unmap_dma:
2152 if (i >= 0) {
2153 /* save value of frag that failed */
2154 last_frag = i;
2155
2156 /* start back at beginning and unmap skb */
2157 tx_info->skb = NULL;
2158 ena_buf = tx_info->bufs;
2159 dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2160 dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2161
2162 /* unmap remaining mapped pages */
2163 for (i = 0; i < last_frag; i++) {
2164 ena_buf++;
2165 dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2166 dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2167 }
2168 }
2169
2170 error_drop_packet:
2171
2172 dev_kfree_skb(skb);
2173 return NETDEV_TX_OK;
2174 }
2175
2176 #ifdef CONFIG_NET_POLL_CONTROLLER
2177 static void ena_netpoll(struct net_device *netdev)
2178 {
2179 struct ena_adapter *adapter = netdev_priv(netdev);
2180 int i;
2181
2182 /* Dont schedule NAPI if the driver is in the middle of reset
2183 * or netdev is down.
2184 */
2185
2186 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags) ||
2187 test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2188 return;
2189
2190 for (i = 0; i < adapter->num_queues; i++)
2191 napi_schedule(&adapter->ena_napi[i].napi);
2192 }
2193 #endif /* CONFIG_NET_POLL_CONTROLLER */
2194
2195 static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
2196 void *accel_priv, select_queue_fallback_t fallback)
2197 {
2198 u16 qid;
2199 /* we suspect that this is good for in--kernel network services that
2200 * want to loop incoming skb rx to tx in normal user generated traffic,
2201 * most probably we will not get to this
2202 */
2203 if (skb_rx_queue_recorded(skb))
2204 qid = skb_get_rx_queue(skb);
2205 else
2206 qid = fallback(dev, skb);
2207
2208 return qid;
2209 }
2210
2211 static void ena_config_host_info(struct ena_com_dev *ena_dev)
2212 {
2213 struct ena_admin_host_info *host_info;
2214 int rc;
2215
2216 /* Allocate only the host info */
2217 rc = ena_com_allocate_host_info(ena_dev);
2218 if (rc) {
2219 pr_err("Cannot allocate host info\n");
2220 return;
2221 }
2222
2223 host_info = ena_dev->host_attr.host_info;
2224
2225 host_info->os_type = ENA_ADMIN_OS_LINUX;
2226 host_info->kernel_ver = LINUX_VERSION_CODE;
2227 strncpy(host_info->kernel_ver_str, utsname()->version,
2228 sizeof(host_info->kernel_ver_str) - 1);
2229 host_info->os_dist = 0;
2230 strncpy(host_info->os_dist_str, utsname()->release,
2231 sizeof(host_info->os_dist_str) - 1);
2232 host_info->driver_version =
2233 (DRV_MODULE_VER_MAJOR) |
2234 (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
2235 (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
2236
2237 rc = ena_com_set_host_attributes(ena_dev);
2238 if (rc) {
2239 if (rc == -EOPNOTSUPP)
2240 pr_warn("Cannot set host attributes\n");
2241 else
2242 pr_err("Cannot set host attributes\n");
2243
2244 goto err;
2245 }
2246
2247 return;
2248
2249 err:
2250 ena_com_delete_host_info(ena_dev);
2251 }
2252
2253 static void ena_config_debug_area(struct ena_adapter *adapter)
2254 {
2255 u32 debug_area_size;
2256 int rc, ss_count;
2257
2258 ss_count = ena_get_sset_count(adapter->netdev, ETH_SS_STATS);
2259 if (ss_count <= 0) {
2260 netif_err(adapter, drv, adapter->netdev,
2261 "SS count is negative\n");
2262 return;
2263 }
2264
2265 /* allocate 32 bytes for each string and 64bit for the value */
2266 debug_area_size = ss_count * ETH_GSTRING_LEN + sizeof(u64) * ss_count;
2267
2268 rc = ena_com_allocate_debug_area(adapter->ena_dev, debug_area_size);
2269 if (rc) {
2270 pr_err("Cannot allocate debug area\n");
2271 return;
2272 }
2273
2274 rc = ena_com_set_host_attributes(adapter->ena_dev);
2275 if (rc) {
2276 if (rc == -EOPNOTSUPP)
2277 netif_warn(adapter, drv, adapter->netdev,
2278 "Cannot set host attributes\n");
2279 else
2280 netif_err(adapter, drv, adapter->netdev,
2281 "Cannot set host attributes\n");
2282 goto err;
2283 }
2284
2285 return;
2286 err:
2287 ena_com_delete_debug_area(adapter->ena_dev);
2288 }
2289
2290 static void ena_get_stats64(struct net_device *netdev,
2291 struct rtnl_link_stats64 *stats)
2292 {
2293 struct ena_adapter *adapter = netdev_priv(netdev);
2294 struct ena_ring *rx_ring, *tx_ring;
2295 unsigned int start;
2296 u64 rx_drops;
2297 int i;
2298
2299 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2300 return;
2301
2302 for (i = 0; i < adapter->num_queues; i++) {
2303 u64 bytes, packets;
2304
2305 tx_ring = &adapter->tx_ring[i];
2306
2307 do {
2308 start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
2309 packets = tx_ring->tx_stats.cnt;
2310 bytes = tx_ring->tx_stats.bytes;
2311 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
2312
2313 stats->tx_packets += packets;
2314 stats->tx_bytes += bytes;
2315
2316 rx_ring = &adapter->rx_ring[i];
2317
2318 do {
2319 start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
2320 packets = rx_ring->rx_stats.cnt;
2321 bytes = rx_ring->rx_stats.bytes;
2322 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
2323
2324 stats->rx_packets += packets;
2325 stats->rx_bytes += bytes;
2326 }
2327
2328 do {
2329 start = u64_stats_fetch_begin_irq(&adapter->syncp);
2330 rx_drops = adapter->dev_stats.rx_drops;
2331 } while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
2332
2333 stats->rx_dropped = rx_drops;
2334
2335 stats->multicast = 0;
2336 stats->collisions = 0;
2337
2338 stats->rx_length_errors = 0;
2339 stats->rx_crc_errors = 0;
2340 stats->rx_frame_errors = 0;
2341 stats->rx_fifo_errors = 0;
2342 stats->rx_missed_errors = 0;
2343 stats->tx_window_errors = 0;
2344
2345 stats->rx_errors = 0;
2346 stats->tx_errors = 0;
2347 }
2348
2349 static const struct net_device_ops ena_netdev_ops = {
2350 .ndo_open = ena_open,
2351 .ndo_stop = ena_close,
2352 .ndo_start_xmit = ena_start_xmit,
2353 .ndo_select_queue = ena_select_queue,
2354 .ndo_get_stats64 = ena_get_stats64,
2355 .ndo_tx_timeout = ena_tx_timeout,
2356 .ndo_change_mtu = ena_change_mtu,
2357 .ndo_set_mac_address = NULL,
2358 .ndo_validate_addr = eth_validate_addr,
2359 #ifdef CONFIG_NET_POLL_CONTROLLER
2360 .ndo_poll_controller = ena_netpoll,
2361 #endif /* CONFIG_NET_POLL_CONTROLLER */
2362 };
2363
2364 static void ena_device_io_suspend(struct work_struct *work)
2365 {
2366 struct ena_adapter *adapter =
2367 container_of(work, struct ena_adapter, suspend_io_task);
2368 struct net_device *netdev = adapter->netdev;
2369
2370 /* ena_napi_disable_all disables only the IO handling.
2371 * We are still subject to AENQ keep alive watchdog.
2372 */
2373 u64_stats_update_begin(&adapter->syncp);
2374 adapter->dev_stats.io_suspend++;
2375 u64_stats_update_begin(&adapter->syncp);
2376 ena_napi_disable_all(adapter);
2377 netif_tx_lock(netdev);
2378 netif_device_detach(netdev);
2379 netif_tx_unlock(netdev);
2380 }
2381
2382 static void ena_device_io_resume(struct work_struct *work)
2383 {
2384 struct ena_adapter *adapter =
2385 container_of(work, struct ena_adapter, resume_io_task);
2386 struct net_device *netdev = adapter->netdev;
2387
2388 u64_stats_update_begin(&adapter->syncp);
2389 adapter->dev_stats.io_resume++;
2390 u64_stats_update_end(&adapter->syncp);
2391
2392 netif_device_attach(netdev);
2393 ena_napi_enable_all(adapter);
2394 }
2395
2396 static int ena_device_validate_params(struct ena_adapter *adapter,
2397 struct ena_com_dev_get_features_ctx *get_feat_ctx)
2398 {
2399 struct net_device *netdev = adapter->netdev;
2400 int rc;
2401
2402 rc = ether_addr_equal(get_feat_ctx->dev_attr.mac_addr,
2403 adapter->mac_addr);
2404 if (!rc) {
2405 netif_err(adapter, drv, netdev,
2406 "Error, mac address are different\n");
2407 return -EINVAL;
2408 }
2409
2410 if ((get_feat_ctx->max_queues.max_cq_num < adapter->num_queues) ||
2411 (get_feat_ctx->max_queues.max_sq_num < adapter->num_queues)) {
2412 netif_err(adapter, drv, netdev,
2413 "Error, device doesn't support enough queues\n");
2414 return -EINVAL;
2415 }
2416
2417 if (get_feat_ctx->dev_attr.max_mtu < netdev->mtu) {
2418 netif_err(adapter, drv, netdev,
2419 "Error, device max mtu is smaller than netdev MTU\n");
2420 return -EINVAL;
2421 }
2422
2423 return 0;
2424 }
2425
2426 static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
2427 struct ena_com_dev_get_features_ctx *get_feat_ctx,
2428 bool *wd_state)
2429 {
2430 struct device *dev = &pdev->dev;
2431 bool readless_supported;
2432 u32 aenq_groups;
2433 int dma_width;
2434 int rc;
2435
2436 rc = ena_com_mmio_reg_read_request_init(ena_dev);
2437 if (rc) {
2438 dev_err(dev, "failed to init mmio read less\n");
2439 return rc;
2440 }
2441
2442 /* The PCIe configuration space revision id indicate if mmio reg
2443 * read is disabled
2444 */
2445 readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
2446 ena_com_set_mmio_read_mode(ena_dev, readless_supported);
2447
2448 rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
2449 if (rc) {
2450 dev_err(dev, "Can not reset device\n");
2451 goto err_mmio_read_less;
2452 }
2453
2454 rc = ena_com_validate_version(ena_dev);
2455 if (rc) {
2456 dev_err(dev, "device version is too low\n");
2457 goto err_mmio_read_less;
2458 }
2459
2460 dma_width = ena_com_get_dma_width(ena_dev);
2461 if (dma_width < 0) {
2462 dev_err(dev, "Invalid dma width value %d", dma_width);
2463 rc = dma_width;
2464 goto err_mmio_read_less;
2465 }
2466
2467 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2468 if (rc) {
2469 dev_err(dev, "pci_set_dma_mask failed 0x%x\n", rc);
2470 goto err_mmio_read_less;
2471 }
2472
2473 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2474 if (rc) {
2475 dev_err(dev, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2476 rc);
2477 goto err_mmio_read_less;
2478 }
2479
2480 /* ENA admin level init */
2481 rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
2482 if (rc) {
2483 dev_err(dev,
2484 "Can not initialize ena admin queue with device\n");
2485 goto err_mmio_read_less;
2486 }
2487
2488 /* To enable the msix interrupts the driver needs to know the number
2489 * of queues. So the driver uses polling mode to retrieve this
2490 * information
2491 */
2492 ena_com_set_admin_polling_mode(ena_dev, true);
2493
2494 ena_config_host_info(ena_dev);
2495
2496 /* Get Device Attributes*/
2497 rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
2498 if (rc) {
2499 dev_err(dev, "Cannot get attribute for ena device rc=%d\n", rc);
2500 goto err_admin_init;
2501 }
2502
2503 /* Try to turn all the available aenq groups */
2504 aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
2505 BIT(ENA_ADMIN_FATAL_ERROR) |
2506 BIT(ENA_ADMIN_WARNING) |
2507 BIT(ENA_ADMIN_NOTIFICATION) |
2508 BIT(ENA_ADMIN_KEEP_ALIVE);
2509
2510 aenq_groups &= get_feat_ctx->aenq.supported_groups;
2511
2512 rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
2513 if (rc) {
2514 dev_err(dev, "Cannot configure aenq groups rc= %d\n", rc);
2515 goto err_admin_init;
2516 }
2517
2518 *wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
2519
2520 return 0;
2521
2522 err_admin_init:
2523 ena_com_delete_host_info(ena_dev);
2524 ena_com_admin_destroy(ena_dev);
2525 err_mmio_read_less:
2526 ena_com_mmio_reg_read_request_destroy(ena_dev);
2527
2528 return rc;
2529 }
2530
2531 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter,
2532 int io_vectors)
2533 {
2534 struct ena_com_dev *ena_dev = adapter->ena_dev;
2535 struct device *dev = &adapter->pdev->dev;
2536 int rc;
2537
2538 rc = ena_enable_msix(adapter, io_vectors);
2539 if (rc) {
2540 dev_err(dev, "Can not reserve msix vectors\n");
2541 return rc;
2542 }
2543
2544 ena_setup_mgmnt_intr(adapter);
2545
2546 rc = ena_request_mgmnt_irq(adapter);
2547 if (rc) {
2548 dev_err(dev, "Can not setup management interrupts\n");
2549 goto err_disable_msix;
2550 }
2551
2552 ena_com_set_admin_polling_mode(ena_dev, false);
2553
2554 ena_com_admin_aenq_enable(ena_dev);
2555
2556 return 0;
2557
2558 err_disable_msix:
2559 ena_disable_msix(adapter);
2560
2561 return rc;
2562 }
2563
2564 static void ena_fw_reset_device(struct work_struct *work)
2565 {
2566 struct ena_com_dev_get_features_ctx get_feat_ctx;
2567 struct ena_adapter *adapter =
2568 container_of(work, struct ena_adapter, reset_task);
2569 struct net_device *netdev = adapter->netdev;
2570 struct ena_com_dev *ena_dev = adapter->ena_dev;
2571 struct pci_dev *pdev = adapter->pdev;
2572 bool dev_up, wd_state;
2573 int rc;
2574
2575 if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2576 dev_err(&pdev->dev,
2577 "device reset schedule while reset bit is off\n");
2578 return;
2579 }
2580
2581 netif_carrier_off(netdev);
2582
2583 del_timer_sync(&adapter->timer_service);
2584
2585 rtnl_lock();
2586
2587 dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2588 ena_com_set_admin_running_state(ena_dev, false);
2589
2590 /* After calling ena_close the tx queues and the napi
2591 * are disabled so no one can interfere or touch the
2592 * data structures
2593 */
2594 ena_close(netdev);
2595
2596 ena_free_mgmnt_irq(adapter);
2597
2598 ena_disable_msix(adapter);
2599
2600 ena_com_abort_admin_commands(ena_dev);
2601
2602 ena_com_wait_for_abort_completion(ena_dev);
2603
2604 ena_com_admin_destroy(ena_dev);
2605
2606 ena_com_mmio_reg_read_request_destroy(ena_dev);
2607
2608 adapter->reset_reason = ENA_REGS_RESET_NORMAL;
2609 clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2610
2611 /* Finish with the destroy part. Start the init part */
2612
2613 rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
2614 if (rc) {
2615 dev_err(&pdev->dev, "Can not initialize device\n");
2616 goto err;
2617 }
2618 adapter->wd_state = wd_state;
2619
2620 rc = ena_device_validate_params(adapter, &get_feat_ctx);
2621 if (rc) {
2622 dev_err(&pdev->dev, "Validation of device parameters failed\n");
2623 goto err_device_destroy;
2624 }
2625
2626 rc = ena_enable_msix_and_set_admin_interrupts(adapter,
2627 adapter->num_queues);
2628 if (rc) {
2629 dev_err(&pdev->dev, "Enable MSI-X failed\n");
2630 goto err_device_destroy;
2631 }
2632 /* If the interface was up before the reset bring it up */
2633 if (dev_up) {
2634 rc = ena_up(adapter);
2635 if (rc) {
2636 dev_err(&pdev->dev, "Failed to create I/O queues\n");
2637 goto err_disable_msix;
2638 }
2639 }
2640
2641 mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
2642
2643 rtnl_unlock();
2644
2645 dev_err(&pdev->dev, "Device reset completed successfully\n");
2646
2647 return;
2648 err_disable_msix:
2649 ena_free_mgmnt_irq(adapter);
2650 ena_disable_msix(adapter);
2651 err_device_destroy:
2652 ena_com_admin_destroy(ena_dev);
2653 err:
2654 rtnl_unlock();
2655
2656 clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2657
2658 dev_err(&pdev->dev,
2659 "Reset attempt failed. Can not reset the device\n");
2660 }
2661
2662 static int check_missing_comp_in_queue(struct ena_adapter *adapter,
2663 struct ena_ring *tx_ring)
2664 {
2665 struct ena_tx_buffer *tx_buf;
2666 unsigned long last_jiffies;
2667 u32 missed_tx = 0;
2668 int i;
2669
2670 for (i = 0; i < tx_ring->ring_size; i++) {
2671 tx_buf = &tx_ring->tx_buffer_info[i];
2672 last_jiffies = tx_buf->last_jiffies;
2673 if (unlikely(last_jiffies &&
2674 time_is_before_jiffies(last_jiffies + adapter->missing_tx_completion_to))) {
2675 if (!tx_buf->print_once)
2676 netif_notice(adapter, tx_err, adapter->netdev,
2677 "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2678 tx_ring->qid, i);
2679
2680 tx_buf->print_once = 1;
2681 missed_tx++;
2682
2683 if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
2684 netif_err(adapter, tx_err, adapter->netdev,
2685 "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
2686 missed_tx,
2687 adapter->missing_tx_completion_threshold);
2688 adapter->reset_reason =
2689 ENA_REGS_RESET_MISS_TX_CMPL;
2690 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2691 return -EIO;
2692 }
2693 }
2694 }
2695
2696 return 0;
2697 }
2698
2699 static void check_for_missing_tx_completions(struct ena_adapter *adapter)
2700 {
2701 struct ena_ring *tx_ring;
2702 int i, budget, rc;
2703
2704 /* Make sure the driver doesn't turn the device in other process */
2705 smp_rmb();
2706
2707 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2708 return;
2709
2710 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2711 return;
2712
2713 if (adapter->missing_tx_completion_to == ENA_HW_HINTS_NO_TIMEOUT)
2714 return;
2715
2716 budget = ENA_MONITORED_TX_QUEUES;
2717
2718 for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) {
2719 tx_ring = &adapter->tx_ring[i];
2720
2721 rc = check_missing_comp_in_queue(adapter, tx_ring);
2722 if (unlikely(rc))
2723 return;
2724
2725 budget--;
2726 if (!budget)
2727 break;
2728 }
2729
2730 adapter->last_monitored_tx_qid = i % adapter->num_queues;
2731 }
2732
2733 /* trigger napi schedule after 2 consecutive detections */
2734 #define EMPTY_RX_REFILL 2
2735 /* For the rare case where the device runs out of Rx descriptors and the
2736 * napi handler failed to refill new Rx descriptors (due to a lack of memory
2737 * for example).
2738 * This case will lead to a deadlock:
2739 * The device won't send interrupts since all the new Rx packets will be dropped
2740 * The napi handler won't allocate new Rx descriptors so the device will be
2741 * able to send new packets.
2742 *
2743 * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
2744 * It is recommended to have at least 512MB, with a minimum of 128MB for
2745 * constrained environment).
2746 *
2747 * When such a situation is detected - Reschedule napi
2748 */
2749 static void check_for_empty_rx_ring(struct ena_adapter *adapter)
2750 {
2751 struct ena_ring *rx_ring;
2752 int i, refill_required;
2753
2754 if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2755 return;
2756
2757 if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2758 return;
2759
2760 for (i = 0; i < adapter->num_queues; i++) {
2761 rx_ring = &adapter->rx_ring[i];
2762
2763 refill_required =
2764 ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
2765 if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
2766 rx_ring->empty_rx_queue++;
2767
2768 if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
2769 u64_stats_update_begin(&rx_ring->syncp);
2770 rx_ring->rx_stats.empty_rx_ring++;
2771 u64_stats_update_end(&rx_ring->syncp);
2772
2773 netif_err(adapter, drv, adapter->netdev,
2774 "trigger refill for ring %d\n", i);
2775
2776 napi_schedule(rx_ring->napi);
2777 rx_ring->empty_rx_queue = 0;
2778 }
2779 } else {
2780 rx_ring->empty_rx_queue = 0;
2781 }
2782 }
2783 }
2784
2785 /* Check for keep alive expiration */
2786 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
2787 {
2788 unsigned long keep_alive_expired;
2789
2790 if (!adapter->wd_state)
2791 return;
2792
2793 if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2794 return;
2795
2796 keep_alive_expired = round_jiffies(adapter->last_keep_alive_jiffies +
2797 adapter->keep_alive_timeout);
2798 if (unlikely(time_is_before_jiffies(keep_alive_expired))) {
2799 netif_err(adapter, drv, adapter->netdev,
2800 "Keep alive watchdog timeout.\n");
2801 u64_stats_update_begin(&adapter->syncp);
2802 adapter->dev_stats.wd_expired++;
2803 u64_stats_update_end(&adapter->syncp);
2804 adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
2805 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2806 }
2807 }
2808
2809 static void check_for_admin_com_state(struct ena_adapter *adapter)
2810 {
2811 if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
2812 netif_err(adapter, drv, adapter->netdev,
2813 "ENA admin queue is not in running state!\n");
2814 u64_stats_update_begin(&adapter->syncp);
2815 adapter->dev_stats.admin_q_pause++;
2816 u64_stats_update_end(&adapter->syncp);
2817 adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
2818 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2819 }
2820 }
2821
2822 static void ena_update_hints(struct ena_adapter *adapter,
2823 struct ena_admin_ena_hw_hints *hints)
2824 {
2825 struct net_device *netdev = adapter->netdev;
2826
2827 if (hints->admin_completion_tx_timeout)
2828 adapter->ena_dev->admin_queue.completion_timeout =
2829 hints->admin_completion_tx_timeout * 1000;
2830
2831 if (hints->mmio_read_timeout)
2832 /* convert to usec */
2833 adapter->ena_dev->mmio_read.reg_read_to =
2834 hints->mmio_read_timeout * 1000;
2835
2836 if (hints->missed_tx_completion_count_threshold_to_reset)
2837 adapter->missing_tx_completion_threshold =
2838 hints->missed_tx_completion_count_threshold_to_reset;
2839
2840 if (hints->missing_tx_completion_timeout) {
2841 if (hints->missing_tx_completion_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2842 adapter->missing_tx_completion_to = ENA_HW_HINTS_NO_TIMEOUT;
2843 else
2844 adapter->missing_tx_completion_to =
2845 msecs_to_jiffies(hints->missing_tx_completion_timeout);
2846 }
2847
2848 if (hints->netdev_wd_timeout)
2849 netdev->watchdog_timeo = msecs_to_jiffies(hints->netdev_wd_timeout);
2850
2851 if (hints->driver_watchdog_timeout) {
2852 if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2853 adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
2854 else
2855 adapter->keep_alive_timeout =
2856 msecs_to_jiffies(hints->driver_watchdog_timeout);
2857 }
2858 }
2859
2860 static void ena_update_host_info(struct ena_admin_host_info *host_info,
2861 struct net_device *netdev)
2862 {
2863 host_info->supported_network_features[0] =
2864 netdev->features & GENMASK_ULL(31, 0);
2865 host_info->supported_network_features[1] =
2866 (netdev->features & GENMASK_ULL(63, 32)) >> 32;
2867 }
2868
2869 static void ena_timer_service(unsigned long data)
2870 {
2871 struct ena_adapter *adapter = (struct ena_adapter *)data;
2872 u8 *debug_area = adapter->ena_dev->host_attr.debug_area_virt_addr;
2873 struct ena_admin_host_info *host_info =
2874 adapter->ena_dev->host_attr.host_info;
2875
2876 check_for_missing_keep_alive(adapter);
2877
2878 check_for_admin_com_state(adapter);
2879
2880 check_for_missing_tx_completions(adapter);
2881
2882 check_for_empty_rx_ring(adapter);
2883
2884 if (debug_area)
2885 ena_dump_stats_to_buf(adapter, debug_area);
2886
2887 if (host_info)
2888 ena_update_host_info(host_info, adapter->netdev);
2889
2890 if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2891 netif_err(adapter, drv, adapter->netdev,
2892 "Trigger reset is on\n");
2893 ena_dump_stats_to_dmesg(adapter);
2894 queue_work(ena_wq, &adapter->reset_task);
2895 return;
2896 }
2897
2898 /* Reset the timer */
2899 mod_timer(&adapter->timer_service, jiffies + HZ);
2900 }
2901
2902 static int ena_calc_io_queue_num(struct pci_dev *pdev,
2903 struct ena_com_dev *ena_dev,
2904 struct ena_com_dev_get_features_ctx *get_feat_ctx)
2905 {
2906 int io_sq_num, io_queue_num;
2907
2908 /* In case of LLQ use the llq number in the get feature cmd */
2909 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2910 io_sq_num = get_feat_ctx->max_queues.max_llq_num;
2911
2912 if (io_sq_num == 0) {
2913 dev_err(&pdev->dev,
2914 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2915
2916 ena_dev->tx_mem_queue_type =
2917 ENA_ADMIN_PLACEMENT_POLICY_HOST;
2918 io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2919 }
2920 } else {
2921 io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2922 }
2923
2924 io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
2925 io_queue_num = min_t(int, io_queue_num, io_sq_num);
2926 io_queue_num = min_t(int, io_queue_num,
2927 get_feat_ctx->max_queues.max_cq_num);
2928 /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2929 io_queue_num = min_t(int, io_queue_num, pci_msix_vec_count(pdev) - 1);
2930 if (unlikely(!io_queue_num)) {
2931 dev_err(&pdev->dev, "The device doesn't have io queues\n");
2932 return -EFAULT;
2933 }
2934
2935 return io_queue_num;
2936 }
2937
2938 static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
2939 struct ena_com_dev_get_features_ctx *get_feat_ctx)
2940 {
2941 bool has_mem_bar;
2942
2943 has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
2944
2945 /* Enable push mode if device supports LLQ */
2946 if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
2947 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2948 else
2949 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2950 }
2951
2952 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
2953 struct net_device *netdev)
2954 {
2955 netdev_features_t dev_features = 0;
2956
2957 /* Set offload features */
2958 if (feat->offload.tx &
2959 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
2960 dev_features |= NETIF_F_IP_CSUM;
2961
2962 if (feat->offload.tx &
2963 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)
2964 dev_features |= NETIF_F_IPV6_CSUM;
2965
2966 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
2967 dev_features |= NETIF_F_TSO;
2968
2969 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
2970 dev_features |= NETIF_F_TSO6;
2971
2972 if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK)
2973 dev_features |= NETIF_F_TSO_ECN;
2974
2975 if (feat->offload.rx_supported &
2976 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
2977 dev_features |= NETIF_F_RXCSUM;
2978
2979 if (feat->offload.rx_supported &
2980 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
2981 dev_features |= NETIF_F_RXCSUM;
2982
2983 netdev->features =
2984 dev_features |
2985 NETIF_F_SG |
2986 NETIF_F_RXHASH |
2987 NETIF_F_HIGHDMA;
2988
2989 netdev->hw_features |= netdev->features;
2990 netdev->vlan_features |= netdev->features;
2991 }
2992
2993 static void ena_set_conf_feat_params(struct ena_adapter *adapter,
2994 struct ena_com_dev_get_features_ctx *feat)
2995 {
2996 struct net_device *netdev = adapter->netdev;
2997
2998 /* Copy mac address */
2999 if (!is_valid_ether_addr(feat->dev_attr.mac_addr)) {
3000 eth_hw_addr_random(netdev);
3001 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
3002 } else {
3003 ether_addr_copy(adapter->mac_addr, feat->dev_attr.mac_addr);
3004 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3005 }
3006
3007 /* Set offload features */
3008 ena_set_dev_offloads(feat, netdev);
3009
3010 adapter->max_mtu = feat->dev_attr.max_mtu;
3011 netdev->max_mtu = adapter->max_mtu;
3012 netdev->min_mtu = ENA_MIN_MTU;
3013 }
3014
3015 static int ena_rss_init_default(struct ena_adapter *adapter)
3016 {
3017 struct ena_com_dev *ena_dev = adapter->ena_dev;
3018 struct device *dev = &adapter->pdev->dev;
3019 int rc, i;
3020 u32 val;
3021
3022 rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
3023 if (unlikely(rc)) {
3024 dev_err(dev, "Cannot init indirect table\n");
3025 goto err_rss_init;
3026 }
3027
3028 for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
3029 val = ethtool_rxfh_indir_default(i, adapter->num_queues);
3030 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
3031 ENA_IO_RXQ_IDX(val));
3032 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3033 dev_err(dev, "Cannot fill indirect table\n");
3034 goto err_fill_indir;
3035 }
3036 }
3037
3038 rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
3039 ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
3040 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3041 dev_err(dev, "Cannot fill hash function\n");
3042 goto err_fill_indir;
3043 }
3044
3045 rc = ena_com_set_default_hash_ctrl(ena_dev);
3046 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3047 dev_err(dev, "Cannot fill hash control\n");
3048 goto err_fill_indir;
3049 }
3050
3051 return 0;
3052
3053 err_fill_indir:
3054 ena_com_rss_destroy(ena_dev);
3055 err_rss_init:
3056
3057 return rc;
3058 }
3059
3060 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
3061 {
3062 int release_bars;
3063
3064 if (ena_dev->mem_bar)
3065 devm_iounmap(&pdev->dev, ena_dev->mem_bar);
3066
3067 if (ena_dev->reg_bar)
3068 devm_iounmap(&pdev->dev, ena_dev->reg_bar);
3069
3070 release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3071 pci_release_selected_regions(pdev, release_bars);
3072 }
3073
3074 static int ena_calc_queue_size(struct pci_dev *pdev,
3075 struct ena_com_dev *ena_dev,
3076 u16 *max_tx_sgl_size,
3077 u16 *max_rx_sgl_size,
3078 struct ena_com_dev_get_features_ctx *get_feat_ctx)
3079 {
3080 u32 queue_size = ENA_DEFAULT_RING_SIZE;
3081
3082 queue_size = min_t(u32, queue_size,
3083 get_feat_ctx->max_queues.max_cq_depth);
3084 queue_size = min_t(u32, queue_size,
3085 get_feat_ctx->max_queues.max_sq_depth);
3086
3087 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
3088 queue_size = min_t(u32, queue_size,
3089 get_feat_ctx->max_queues.max_llq_depth);
3090
3091 queue_size = rounddown_pow_of_two(queue_size);
3092
3093 if (unlikely(!queue_size)) {
3094 dev_err(&pdev->dev, "Invalid queue size\n");
3095 return -EFAULT;
3096 }
3097
3098 *max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3099 get_feat_ctx->max_queues.max_packet_tx_descs);
3100 *max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3101 get_feat_ctx->max_queues.max_packet_rx_descs);
3102
3103 return queue_size;
3104 }
3105
3106 /* ena_probe - Device Initialization Routine
3107 * @pdev: PCI device information struct
3108 * @ent: entry in ena_pci_tbl
3109 *
3110 * Returns 0 on success, negative on failure
3111 *
3112 * ena_probe initializes an adapter identified by a pci_dev structure.
3113 * The OS initialization, configuring of the adapter private structure,
3114 * and a hardware reset occur.
3115 */
3116 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3117 {
3118 struct ena_com_dev_get_features_ctx get_feat_ctx;
3119 static int version_printed;
3120 struct net_device *netdev;
3121 struct ena_adapter *adapter;
3122 struct ena_com_dev *ena_dev = NULL;
3123 static int adapters_found;
3124 int io_queue_num, bars, rc;
3125 int queue_size;
3126 u16 tx_sgl_size = 0;
3127 u16 rx_sgl_size = 0;
3128 bool wd_state;
3129
3130 dev_dbg(&pdev->dev, "%s\n", __func__);
3131
3132 if (version_printed++ == 0)
3133 dev_info(&pdev->dev, "%s", version);
3134
3135 rc = pci_enable_device_mem(pdev);
3136 if (rc) {
3137 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
3138 return rc;
3139 }
3140
3141 pci_set_master(pdev);
3142
3143 ena_dev = vzalloc(sizeof(*ena_dev));
3144 if (!ena_dev) {
3145 rc = -ENOMEM;
3146 goto err_disable_device;
3147 }
3148
3149 bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3150 rc = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
3151 if (rc) {
3152 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
3153 rc);
3154 goto err_free_ena_dev;
3155 }
3156
3157 ena_dev->reg_bar = devm_ioremap(&pdev->dev,
3158 pci_resource_start(pdev, ENA_REG_BAR),
3159 pci_resource_len(pdev, ENA_REG_BAR));
3160 if (!ena_dev->reg_bar) {
3161 dev_err(&pdev->dev, "failed to remap regs bar\n");
3162 rc = -EFAULT;
3163 goto err_free_region;
3164 }
3165
3166 ena_dev->dmadev = &pdev->dev;
3167
3168 rc = ena_device_init(ena_dev, pdev, &get_feat_ctx, &wd_state);
3169 if (rc) {
3170 dev_err(&pdev->dev, "ena device init failed\n");
3171 if (rc == -ETIME)
3172 rc = -EPROBE_DEFER;
3173 goto err_free_region;
3174 }
3175
3176 ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
3177
3178 if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
3179 ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
3180 pci_resource_start(pdev, ENA_MEM_BAR),
3181 pci_resource_len(pdev, ENA_MEM_BAR));
3182 if (!ena_dev->mem_bar) {
3183 rc = -EFAULT;
3184 goto err_device_destroy;
3185 }
3186 }
3187
3188 /* initial Tx interrupt delay, Assumes 1 usec granularity.
3189 * Updated during device initialization with the real granularity
3190 */
3191 ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
3192 io_queue_num = ena_calc_io_queue_num(pdev, ena_dev, &get_feat_ctx);
3193 queue_size = ena_calc_queue_size(pdev, ena_dev, &tx_sgl_size,
3194 &rx_sgl_size, &get_feat_ctx);
3195 if ((queue_size <= 0) || (io_queue_num <= 0)) {
3196 rc = -EFAULT;
3197 goto err_device_destroy;
3198 }
3199
3200 dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
3201 io_queue_num, queue_size);
3202
3203 /* dev zeroed in init_etherdev */
3204 netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
3205 if (!netdev) {
3206 dev_err(&pdev->dev, "alloc_etherdev_mq failed\n");
3207 rc = -ENOMEM;
3208 goto err_device_destroy;
3209 }
3210
3211 SET_NETDEV_DEV(netdev, &pdev->dev);
3212
3213 adapter = netdev_priv(netdev);
3214 pci_set_drvdata(pdev, adapter);
3215
3216 adapter->ena_dev = ena_dev;
3217 adapter->netdev = netdev;
3218 adapter->pdev = pdev;
3219
3220 ena_set_conf_feat_params(adapter, &get_feat_ctx);
3221
3222 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3223 adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3224
3225 adapter->tx_ring_size = queue_size;
3226 adapter->rx_ring_size = queue_size;
3227
3228 adapter->max_tx_sgl_size = tx_sgl_size;
3229 adapter->max_rx_sgl_size = rx_sgl_size;
3230
3231 adapter->num_queues = io_queue_num;
3232 adapter->last_monitored_tx_qid = 0;
3233
3234 adapter->rx_copybreak = ENA_DEFAULT_RX_COPYBREAK;
3235 adapter->wd_state = wd_state;
3236
3237 snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", adapters_found);
3238
3239 rc = ena_com_init_interrupt_moderation(adapter->ena_dev);
3240 if (rc) {
3241 dev_err(&pdev->dev,
3242 "Failed to query interrupt moderation feature\n");
3243 goto err_netdev_destroy;
3244 }
3245 ena_init_io_rings(adapter);
3246
3247 netdev->netdev_ops = &ena_netdev_ops;
3248 netdev->watchdog_timeo = TX_TIMEOUT;
3249 ena_set_ethtool_ops(netdev);
3250
3251 netdev->priv_flags |= IFF_UNICAST_FLT;
3252
3253 u64_stats_init(&adapter->syncp);
3254
3255 rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
3256 if (rc) {
3257 dev_err(&pdev->dev,
3258 "Failed to enable and set the admin interrupts\n");
3259 goto err_worker_destroy;
3260 }
3261 rc = ena_rss_init_default(adapter);
3262 if (rc && (rc != -EOPNOTSUPP)) {
3263 dev_err(&pdev->dev, "Cannot init RSS rc: %d\n", rc);
3264 goto err_free_msix;
3265 }
3266
3267 ena_config_debug_area(adapter);
3268
3269 memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
3270
3271 netif_carrier_off(netdev);
3272
3273 rc = register_netdev(netdev);
3274 if (rc) {
3275 dev_err(&pdev->dev, "Cannot register net device\n");
3276 goto err_rss;
3277 }
3278
3279 INIT_WORK(&adapter->suspend_io_task, ena_device_io_suspend);
3280 INIT_WORK(&adapter->resume_io_task, ena_device_io_resume);
3281 INIT_WORK(&adapter->reset_task, ena_fw_reset_device);
3282
3283 adapter->last_keep_alive_jiffies = jiffies;
3284 adapter->keep_alive_timeout = ENA_DEVICE_KALIVE_TIMEOUT;
3285 adapter->missing_tx_completion_to = TX_TIMEOUT;
3286 adapter->missing_tx_completion_threshold = MAX_NUM_OF_TIMEOUTED_PACKETS;
3287
3288 ena_update_hints(adapter, &get_feat_ctx.hw_hints);
3289
3290 setup_timer(&adapter->timer_service, ena_timer_service,
3291 (unsigned long)adapter);
3292 mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3293
3294 dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
3295 DEVICE_NAME, (long)pci_resource_start(pdev, 0),
3296 netdev->dev_addr, io_queue_num);
3297
3298 set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3299
3300 adapters_found++;
3301
3302 return 0;
3303
3304 err_rss:
3305 ena_com_delete_debug_area(ena_dev);
3306 ena_com_rss_destroy(ena_dev);
3307 err_free_msix:
3308 ena_com_dev_reset(ena_dev, ENA_REGS_RESET_INIT_ERR);
3309 ena_free_mgmnt_irq(adapter);
3310 ena_disable_msix(adapter);
3311 err_worker_destroy:
3312 ena_com_destroy_interrupt_moderation(ena_dev);
3313 del_timer(&adapter->timer_service);
3314 cancel_work_sync(&adapter->suspend_io_task);
3315 cancel_work_sync(&adapter->resume_io_task);
3316 err_netdev_destroy:
3317 free_netdev(netdev);
3318 err_device_destroy:
3319 ena_com_delete_host_info(ena_dev);
3320 ena_com_admin_destroy(ena_dev);
3321 err_free_region:
3322 ena_release_bars(ena_dev, pdev);
3323 err_free_ena_dev:
3324 vfree(ena_dev);
3325 err_disable_device:
3326 pci_disable_device(pdev);
3327 return rc;
3328 }
3329
3330 /*****************************************************************************/
3331 static int ena_sriov_configure(struct pci_dev *dev, int numvfs)
3332 {
3333 int rc;
3334
3335 if (numvfs > 0) {
3336 rc = pci_enable_sriov(dev, numvfs);
3337 if (rc != 0) {
3338 dev_err(&dev->dev,
3339 "pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
3340 numvfs, rc);
3341 return rc;
3342 }
3343
3344 return numvfs;
3345 }
3346
3347 if (numvfs == 0) {
3348 pci_disable_sriov(dev);
3349 return 0;
3350 }
3351
3352 return -EINVAL;
3353 }
3354
3355 /*****************************************************************************/
3356 /*****************************************************************************/
3357
3358 /* ena_remove - Device Removal Routine
3359 * @pdev: PCI device information struct
3360 *
3361 * ena_remove is called by the PCI subsystem to alert the driver
3362 * that it should release a PCI device.
3363 */
3364 static void ena_remove(struct pci_dev *pdev)
3365 {
3366 struct ena_adapter *adapter = pci_get_drvdata(pdev);
3367 struct ena_com_dev *ena_dev;
3368 struct net_device *netdev;
3369
3370 ena_dev = adapter->ena_dev;
3371 netdev = adapter->netdev;
3372
3373 #ifdef CONFIG_RFS_ACCEL
3374 if ((adapter->msix_vecs >= 1) && (netdev->rx_cpu_rmap)) {
3375 free_irq_cpu_rmap(netdev->rx_cpu_rmap);
3376 netdev->rx_cpu_rmap = NULL;
3377 }
3378 #endif /* CONFIG_RFS_ACCEL */
3379
3380 unregister_netdev(netdev);
3381 del_timer_sync(&adapter->timer_service);
3382
3383 cancel_work_sync(&adapter->reset_task);
3384
3385 cancel_work_sync(&adapter->suspend_io_task);
3386
3387 cancel_work_sync(&adapter->resume_io_task);
3388
3389 /* Reset the device only if the device is running. */
3390 if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
3391 ena_com_dev_reset(ena_dev, adapter->reset_reason);
3392
3393 ena_free_mgmnt_irq(adapter);
3394
3395 ena_disable_msix(adapter);
3396
3397 free_netdev(netdev);
3398
3399 ena_com_mmio_reg_read_request_destroy(ena_dev);
3400
3401 ena_com_abort_admin_commands(ena_dev);
3402
3403 ena_com_wait_for_abort_completion(ena_dev);
3404
3405 ena_com_admin_destroy(ena_dev);
3406
3407 ena_com_rss_destroy(ena_dev);
3408
3409 ena_com_delete_debug_area(ena_dev);
3410
3411 ena_com_delete_host_info(ena_dev);
3412
3413 ena_release_bars(ena_dev, pdev);
3414
3415 pci_disable_device(pdev);
3416
3417 ena_com_destroy_interrupt_moderation(ena_dev);
3418
3419 vfree(ena_dev);
3420 }
3421
3422 static struct pci_driver ena_pci_driver = {
3423 .name = DRV_MODULE_NAME,
3424 .id_table = ena_pci_tbl,
3425 .probe = ena_probe,
3426 .remove = ena_remove,
3427 .sriov_configure = ena_sriov_configure,
3428 };
3429
3430 static int __init ena_init(void)
3431 {
3432 pr_info("%s", version);
3433
3434 ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
3435 if (!ena_wq) {
3436 pr_err("Failed to create workqueue\n");
3437 return -ENOMEM;
3438 }
3439
3440 return pci_register_driver(&ena_pci_driver);
3441 }
3442
3443 static void __exit ena_cleanup(void)
3444 {
3445 pci_unregister_driver(&ena_pci_driver);
3446
3447 if (ena_wq) {
3448 destroy_workqueue(ena_wq);
3449 ena_wq = NULL;
3450 }
3451 }
3452
3453 /******************************************************************************
3454 ******************************** AENQ Handlers *******************************
3455 *****************************************************************************/
3456 /* ena_update_on_link_change:
3457 * Notify the network interface about the change in link status
3458 */
3459 static void ena_update_on_link_change(void *adapter_data,
3460 struct ena_admin_aenq_entry *aenq_e)
3461 {
3462 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3463 struct ena_admin_aenq_link_change_desc *aenq_desc =
3464 (struct ena_admin_aenq_link_change_desc *)aenq_e;
3465 int status = aenq_desc->flags &
3466 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3467
3468 if (status) {
3469 netdev_dbg(adapter->netdev, "%s\n", __func__);
3470 set_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3471 netif_carrier_on(adapter->netdev);
3472 } else {
3473 clear_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3474 netif_carrier_off(adapter->netdev);
3475 }
3476 }
3477
3478 static void ena_keep_alive_wd(void *adapter_data,
3479 struct ena_admin_aenq_entry *aenq_e)
3480 {
3481 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3482 struct ena_admin_aenq_keep_alive_desc *desc;
3483 u64 rx_drops;
3484
3485 desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
3486 adapter->last_keep_alive_jiffies = jiffies;
3487
3488 rx_drops = ((u64)desc->rx_drops_high << 32) | desc->rx_drops_low;
3489
3490 u64_stats_update_begin(&adapter->syncp);
3491 adapter->dev_stats.rx_drops = rx_drops;
3492 u64_stats_update_end(&adapter->syncp);
3493 }
3494
3495 static void ena_notification(void *adapter_data,
3496 struct ena_admin_aenq_entry *aenq_e)
3497 {
3498 struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3499 struct ena_admin_ena_hw_hints *hints;
3500
3501 WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
3502 "Invalid group(%x) expected %x\n",
3503 aenq_e->aenq_common_desc.group,
3504 ENA_ADMIN_NOTIFICATION);
3505
3506 switch (aenq_e->aenq_common_desc.syndrom) {
3507 case ENA_ADMIN_SUSPEND:
3508 /* Suspend just the IO queues.
3509 * We deliberately don't suspend admin so the timer and
3510 * the keep_alive events should remain.
3511 */
3512 queue_work(ena_wq, &adapter->suspend_io_task);
3513 break;
3514 case ENA_ADMIN_RESUME:
3515 queue_work(ena_wq, &adapter->resume_io_task);
3516 break;
3517 case ENA_ADMIN_UPDATE_HINTS:
3518 hints = (struct ena_admin_ena_hw_hints *)
3519 (&aenq_e->inline_data_w4);
3520 ena_update_hints(adapter, hints);
3521 break;
3522 default:
3523 netif_err(adapter, drv, adapter->netdev,
3524 "Invalid aenq notification link state %d\n",
3525 aenq_e->aenq_common_desc.syndrom);
3526 }
3527 }
3528
3529 /* This handler will called for unknown event group or unimplemented handlers*/
3530 static void unimplemented_aenq_handler(void *data,
3531 struct ena_admin_aenq_entry *aenq_e)
3532 {
3533 struct ena_adapter *adapter = (struct ena_adapter *)data;
3534
3535 netif_err(adapter, drv, adapter->netdev,
3536 "Unknown event was received or event with unimplemented handler\n");
3537 }
3538
3539 static struct ena_aenq_handlers aenq_handlers = {
3540 .handlers = {
3541 [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3542 [ENA_ADMIN_NOTIFICATION] = ena_notification,
3543 [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3544 },
3545 .unimplemented_handler = unimplemented_aenq_handler
3546 };
3547
3548 module_init(ena_init);
3549 module_exit(ena_cleanup);