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net: ena: fix theoretical Rx hang on low memory systems
[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / amazon / ena / ena_ethtool.c
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1738cd3e
NB		 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#include <linux/pci.h>
34
35#include "ena_netdev.h"
36
37struct ena_stats {
38 char name[ETH_GSTRING_LEN];
39 int stat_offset;
40};
41
42#define ENA_STAT_ENA_COM_ENTRY(stat) { \
43 .name = #stat, \
44 .stat_offset = offsetof(struct ena_com_stats_admin, stat) \
45}
46
47#define ENA_STAT_ENTRY(stat, stat_type) { \
48 .name = #stat, \
49 .stat_offset = offsetof(struct ena_stats_##stat_type, stat) \
50}
51
52#define ENA_STAT_RX_ENTRY(stat) \
53 ENA_STAT_ENTRY(stat, rx)
54
55#define ENA_STAT_TX_ENTRY(stat) \
56 ENA_STAT_ENTRY(stat, tx)
57
58#define ENA_STAT_GLOBAL_ENTRY(stat) \
59 ENA_STAT_ENTRY(stat, dev)
60
61static const struct ena_stats ena_stats_global_strings[] = {
62 ENA_STAT_GLOBAL_ENTRY(tx_timeout),
63 ENA_STAT_GLOBAL_ENTRY(io_suspend),
64 ENA_STAT_GLOBAL_ENTRY(io_resume),
65 ENA_STAT_GLOBAL_ENTRY(wd_expired),
66 ENA_STAT_GLOBAL_ENTRY(interface_up),
67 ENA_STAT_GLOBAL_ENTRY(interface_down),
68 ENA_STAT_GLOBAL_ENTRY(admin_q_pause),
69};
70
71static const struct ena_stats ena_stats_tx_strings[] = {
72 ENA_STAT_TX_ENTRY(cnt),
73 ENA_STAT_TX_ENTRY(bytes),
74 ENA_STAT_TX_ENTRY(queue_stop),
75 ENA_STAT_TX_ENTRY(queue_wakeup),
76 ENA_STAT_TX_ENTRY(dma_mapping_err),
77 ENA_STAT_TX_ENTRY(linearize),
78 ENA_STAT_TX_ENTRY(linearize_failed),
79 ENA_STAT_TX_ENTRY(napi_comp),
80 ENA_STAT_TX_ENTRY(tx_poll),
81 ENA_STAT_TX_ENTRY(doorbells),
82 ENA_STAT_TX_ENTRY(prepare_ctx_err),
83 ENA_STAT_TX_ENTRY(missing_tx_comp),
84 ENA_STAT_TX_ENTRY(bad_req_id),
85};
86
87static const struct ena_stats ena_stats_rx_strings[] = {
88 ENA_STAT_RX_ENTRY(cnt),
89 ENA_STAT_RX_ENTRY(bytes),
90 ENA_STAT_RX_ENTRY(refil_partial),
91 ENA_STAT_RX_ENTRY(bad_csum),
92 ENA_STAT_RX_ENTRY(page_alloc_fail),
93 ENA_STAT_RX_ENTRY(skb_alloc_fail),
94 ENA_STAT_RX_ENTRY(dma_mapping_err),
95 ENA_STAT_RX_ENTRY(bad_desc_num),
96 ENA_STAT_RX_ENTRY(rx_copybreak_pkt),
d09b6090 97 ENA_STAT_RX_ENTRY(empty_rx_ring),
1738cd3e
NB		 98};
99
100static const struct ena_stats ena_stats_ena_com_strings[] = {
101 ENA_STAT_ENA_COM_ENTRY(aborted_cmd),
102 ENA_STAT_ENA_COM_ENTRY(submitted_cmd),
103 ENA_STAT_ENA_COM_ENTRY(completed_cmd),
104 ENA_STAT_ENA_COM_ENTRY(out_of_space),
105 ENA_STAT_ENA_COM_ENTRY(no_completion),
106};
107
108#define ENA_STATS_ARRAY_GLOBAL ARRAY_SIZE(ena_stats_global_strings)
109#define ENA_STATS_ARRAY_TX ARRAY_SIZE(ena_stats_tx_strings)
110#define ENA_STATS_ARRAY_RX ARRAY_SIZE(ena_stats_rx_strings)
111#define ENA_STATS_ARRAY_ENA_COM ARRAY_SIZE(ena_stats_ena_com_strings)
112
113static void ena_safe_update_stat(u64 *src, u64 *dst,
114 struct u64_stats_sync *syncp)
115{
116 unsigned int start;
117
118 do {
119 start = u64_stats_fetch_begin_irq(syncp);
120 *(dst) = *src;
121 } while (u64_stats_fetch_retry_irq(syncp, start));
122}
123
124static void ena_queue_stats(struct ena_adapter *adapter, u64 **data)
125{
126 const struct ena_stats *ena_stats;
127 struct ena_ring *ring;
128
129 u64 *ptr;
130 int i, j;
131
132 for (i = 0; i < adapter->num_queues; i++) {
133 /* Tx stats */
134 ring = &adapter->tx_ring[i];
135
136 for (j = 0; j < ENA_STATS_ARRAY_TX; j++) {
137 ena_stats = &ena_stats_tx_strings[j];
138
139 ptr = (u64 *)((uintptr_t)&ring->tx_stats +
140 (uintptr_t)ena_stats->stat_offset);
141
142 ena_safe_update_stat(ptr, (*data)++, &ring->syncp);
143 }
144
145 /* Rx stats */
146 ring = &adapter->rx_ring[i];
147
148 for (j = 0; j < ENA_STATS_ARRAY_RX; j++) {
149 ena_stats = &ena_stats_rx_strings[j];
150
151 ptr = (u64 *)((uintptr_t)&ring->rx_stats +
152 (uintptr_t)ena_stats->stat_offset);
153
154 ena_safe_update_stat(ptr, (*data)++, &ring->syncp);
155 }
156 }
157}
158
159static void ena_dev_admin_queue_stats(struct ena_adapter *adapter, u64 **data)
160{
161 const struct ena_stats *ena_stats;
162 u32 *ptr;
163 int i;
164
165 for (i = 0; i < ENA_STATS_ARRAY_ENA_COM; i++) {
166 ena_stats = &ena_stats_ena_com_strings[i];
167
168 ptr = (u32 *)((uintptr_t)&adapter->ena_dev->admin_queue.stats +
169 (uintptr_t)ena_stats->stat_offset);
170
171 *(*data)++ = *ptr;
172 }
173}
174
175static void ena_get_ethtool_stats(struct net_device *netdev,
176 struct ethtool_stats *stats,
177 u64 *data)
178{
179 struct ena_adapter *adapter = netdev_priv(netdev);
180 const struct ena_stats *ena_stats;
181 u64 *ptr;
182 int i;
183
184 for (i = 0; i < ENA_STATS_ARRAY_GLOBAL; i++) {
185 ena_stats = &ena_stats_global_strings[i];
186
187 ptr = (u64 *)((uintptr_t)&adapter->dev_stats +
188 (uintptr_t)ena_stats->stat_offset);
189
190 ena_safe_update_stat(ptr, data++, &adapter->syncp);
191 }
192
193 ena_queue_stats(adapter, &data);
194 ena_dev_admin_queue_stats(adapter, &data);
195}
196
197int ena_get_sset_count(struct net_device *netdev, int sset)
198{
199 struct ena_adapter *adapter = netdev_priv(netdev);
200
201 if (sset != ETH_SS_STATS)
202 return -EOPNOTSUPP;
203
204 return adapter->num_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
205 + ENA_STATS_ARRAY_GLOBAL + ENA_STATS_ARRAY_ENA_COM;
206}
207
208static void ena_queue_strings(struct ena_adapter *adapter, u8 **data)
209{
210 const struct ena_stats *ena_stats;
211 int i, j;
212
213 for (i = 0; i < adapter->num_queues; i++) {
214 /* Tx stats */
215 for (j = 0; j < ENA_STATS_ARRAY_TX; j++) {
216 ena_stats = &ena_stats_tx_strings[j];
217
218 snprintf(*data, ETH_GSTRING_LEN,
219 "queue_%u_tx_%s", i, ena_stats->name);
220 (*data) += ETH_GSTRING_LEN;
221 }
222 /* Rx stats */
223 for (j = 0; j < ENA_STATS_ARRAY_RX; j++) {
224 ena_stats = &ena_stats_rx_strings[j];
225
226 snprintf(*data, ETH_GSTRING_LEN,
227 "queue_%u_rx_%s", i, ena_stats->name);
228 (*data) += ETH_GSTRING_LEN;
229 }
230 }
231}
232
233static void ena_com_dev_strings(u8 **data)
234{
235 const struct ena_stats *ena_stats;
236 int i;
237
238 for (i = 0; i < ENA_STATS_ARRAY_ENA_COM; i++) {
239 ena_stats = &ena_stats_ena_com_strings[i];
240
241 snprintf(*data, ETH_GSTRING_LEN,
242 "ena_admin_q_%s", ena_stats->name);
243 (*data) += ETH_GSTRING_LEN;
244 }
245}
246
247static void ena_get_strings(struct net_device *netdev, u32 sset, u8 *data)
248{
249 struct ena_adapter *adapter = netdev_priv(netdev);
250 const struct ena_stats *ena_stats;
251 int i;
252
253 if (sset != ETH_SS_STATS)
254 return;
255
256 for (i = 0; i < ENA_STATS_ARRAY_GLOBAL; i++) {
257 ena_stats = &ena_stats_global_strings[i];
258
259 memcpy(data, ena_stats->name, ETH_GSTRING_LEN);
260 data += ETH_GSTRING_LEN;
261 }
262
263 ena_queue_strings(adapter, &data);
264 ena_com_dev_strings(&data);
265}
266
267static int ena_get_link_ksettings(struct net_device *netdev,
268 struct ethtool_link_ksettings *link_ksettings)
269{
270 struct ena_adapter *adapter = netdev_priv(netdev);
271 struct ena_com_dev *ena_dev = adapter->ena_dev;
272 struct ena_admin_get_feature_link_desc *link;
273 struct ena_admin_get_feat_resp feat_resp;
274 int rc;
275
276 rc = ena_com_get_link_params(ena_dev, &feat_resp);
277 if (rc)
278 return rc;
279
280 link = &feat_resp.u.link;
281 link_ksettings->base.speed = link->speed;
282
283 if (link->flags & ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK) {
284 ethtool_link_ksettings_add_link_mode(link_ksettings,
285 supported, Autoneg);
286 ethtool_link_ksettings_add_link_mode(link_ksettings,
287 supported, Autoneg);
288 }
289
290 link_ksettings->base.autoneg =
291 (link->flags & ENA_ADMIN_GET_FEATURE_LINK_DESC_AUTONEG_MASK) ?
292 AUTONEG_ENABLE : AUTONEG_DISABLE;
293
294 link_ksettings->base.duplex = DUPLEX_FULL;
295
296 return 0;
297}
298
299static int ena_get_coalesce(struct net_device *net_dev,
300 struct ethtool_coalesce *coalesce)
301{
302 struct ena_adapter *adapter = netdev_priv(net_dev);
303 struct ena_com_dev *ena_dev = adapter->ena_dev;
304 struct ena_intr_moder_entry intr_moder_entry;
305
306 if (!ena_com_interrupt_moderation_supported(ena_dev)) {
307 /* the devie doesn't support interrupt moderation */
308 return -EOPNOTSUPP;
309 }
310 coalesce->tx_coalesce_usecs =
311 ena_com_get_nonadaptive_moderation_interval_tx(ena_dev) /
312 ena_dev->intr_delay_resolution;
313 if (!ena_com_get_adaptive_moderation_enabled(ena_dev)) {
314 coalesce->rx_coalesce_usecs =
315 ena_com_get_nonadaptive_moderation_interval_rx(ena_dev)
316 / ena_dev->intr_delay_resolution;
317 } else {
318 ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_LOWEST, &intr_moder_entry);
319 coalesce->rx_coalesce_usecs_low = intr_moder_entry.intr_moder_interval;
320 coalesce->rx_max_coalesced_frames_low = intr_moder_entry.pkts_per_interval;
321
322 ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_MID, &intr_moder_entry);
323 coalesce->rx_coalesce_usecs = intr_moder_entry.intr_moder_interval;
324 coalesce->rx_max_coalesced_frames = intr_moder_entry.pkts_per_interval;
325
326 ena_com_get_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_HIGHEST, &intr_moder_entry);
327 coalesce->rx_coalesce_usecs_high = intr_moder_entry.intr_moder_interval;
328 coalesce->rx_max_coalesced_frames_high = intr_moder_entry.pkts_per_interval;
329 }
330 coalesce->use_adaptive_rx_coalesce =
331 ena_com_get_adaptive_moderation_enabled(ena_dev);
332
333 return 0;
334}
335
336static void ena_update_tx_rings_intr_moderation(struct ena_adapter *adapter)
337{
338 unsigned int val;
339 int i;
340
341 val = ena_com_get_nonadaptive_moderation_interval_tx(adapter->ena_dev);
342
343 for (i = 0; i < adapter->num_queues; i++)
344 adapter->tx_ring[i].smoothed_interval = val;
345}
346
347static int ena_set_coalesce(struct net_device *net_dev,
348 struct ethtool_coalesce *coalesce)
349{
350 struct ena_adapter *adapter = netdev_priv(net_dev);
351 struct ena_com_dev *ena_dev = adapter->ena_dev;
352 struct ena_intr_moder_entry intr_moder_entry;
353 int rc;
354
355 if (!ena_com_interrupt_moderation_supported(ena_dev)) {
356 /* the devie doesn't support interrupt moderation */
357 return -EOPNOTSUPP;
358 }
359
360 if (coalesce->rx_coalesce_usecs_irq ||
361 coalesce->rx_max_coalesced_frames_irq ||
362 coalesce->tx_coalesce_usecs_irq ||
363 coalesce->tx_max_coalesced_frames ||
364 coalesce->tx_max_coalesced_frames_irq ||
365 coalesce->stats_block_coalesce_usecs ||
366 coalesce->use_adaptive_tx_coalesce ||
367 coalesce->pkt_rate_low ||
368 coalesce->tx_coalesce_usecs_low ||
369 coalesce->tx_max_coalesced_frames_low ||
370 coalesce->pkt_rate_high ||
371 coalesce->tx_coalesce_usecs_high ||
372 coalesce->tx_max_coalesced_frames_high ||
373 coalesce->rate_sample_interval)
374 return -EINVAL;
375
376 rc = ena_com_update_nonadaptive_moderation_interval_tx(ena_dev,
377 coalesce->tx_coalesce_usecs);
378 if (rc)
379 return rc;
380
381 ena_update_tx_rings_intr_moderation(adapter);
382
383 if (ena_com_get_adaptive_moderation_enabled(ena_dev)) {
384 if (!coalesce->use_adaptive_rx_coalesce) {
385 ena_com_disable_adaptive_moderation(ena_dev);
386 rc = ena_com_update_nonadaptive_moderation_interval_rx(ena_dev,
387 coalesce->rx_coalesce_usecs);
388 return rc;
389 }
390 } else { /* was in non-adaptive mode */
391 if (coalesce->use_adaptive_rx_coalesce) {
392 ena_com_enable_adaptive_moderation(ena_dev);
393 } else {
394 rc = ena_com_update_nonadaptive_moderation_interval_rx(ena_dev,
395 coalesce->rx_coalesce_usecs);
396 return rc;
397 }
398 }
399
400 intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs_low;
401 intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames_low;
402 intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
403 ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_LOWEST, &intr_moder_entry);
404
405 intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs;
406 intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames;
407 intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
408 ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_MID, &intr_moder_entry);
409
410 intr_moder_entry.intr_moder_interval = coalesce->rx_coalesce_usecs_high;
411 intr_moder_entry.pkts_per_interval = coalesce->rx_max_coalesced_frames_high;
412 intr_moder_entry.bytes_per_interval = ENA_INTR_BYTE_COUNT_NOT_SUPPORTED;
413 ena_com_init_intr_moderation_entry(adapter->ena_dev, ENA_INTR_MODER_HIGHEST, &intr_moder_entry);
414
415 return 0;
416}
417
418static u32 ena_get_msglevel(struct net_device *netdev)
419{
420 struct ena_adapter *adapter = netdev_priv(netdev);
421
422 return adapter->msg_enable;
423}
424
425static void ena_set_msglevel(struct net_device *netdev, u32 value)
426{
427 struct ena_adapter *adapter = netdev_priv(netdev);
428
429 adapter->msg_enable = value;
430}
431
432static void ena_get_drvinfo(struct net_device *dev,
433 struct ethtool_drvinfo *info)
434{
435 struct ena_adapter *adapter = netdev_priv(dev);
436
437 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
438 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
439 strlcpy(info->bus_info, pci_name(adapter->pdev),
440 sizeof(info->bus_info));
441}
442
443static void ena_get_ringparam(struct net_device *netdev,
444 struct ethtool_ringparam *ring)
445{
446 struct ena_adapter *adapter = netdev_priv(netdev);
447 struct ena_ring *tx_ring = &adapter->tx_ring[0];
448 struct ena_ring *rx_ring = &adapter->rx_ring[0];
449
450 ring->rx_max_pending = rx_ring->ring_size;
451 ring->tx_max_pending = tx_ring->ring_size;
452 ring->rx_pending = rx_ring->ring_size;
453 ring->tx_pending = tx_ring->ring_size;
454}
455
456static u32 ena_flow_hash_to_flow_type(u16 hash_fields)
457{
458 u32 data = 0;
459
460 if (hash_fields & ENA_ADMIN_RSS_L2_DA)
461 data |= RXH_L2DA;
462
463 if (hash_fields & ENA_ADMIN_RSS_L3_DA)
464 data |= RXH_IP_DST;
465
466 if (hash_fields & ENA_ADMIN_RSS_L3_SA)
467 data |= RXH_IP_SRC;
468
469 if (hash_fields & ENA_ADMIN_RSS_L4_DP)
470 data |= RXH_L4_B_2_3;
471
472 if (hash_fields & ENA_ADMIN_RSS_L4_SP)
473 data |= RXH_L4_B_0_1;
474
475 return data;
476}
477
478static u16 ena_flow_data_to_flow_hash(u32 hash_fields)
479{
480 u16 data = 0;
481
482 if (hash_fields & RXH_L2DA)
483 data |= ENA_ADMIN_RSS_L2_DA;
484
485 if (hash_fields & RXH_IP_DST)
486 data |= ENA_ADMIN_RSS_L3_DA;
487
488 if (hash_fields & RXH_IP_SRC)
489 data |= ENA_ADMIN_RSS_L3_SA;
490
491 if (hash_fields & RXH_L4_B_2_3)
492 data |= ENA_ADMIN_RSS_L4_DP;
493
494 if (hash_fields & RXH_L4_B_0_1)
495 data |= ENA_ADMIN_RSS_L4_SP;
496
497 return data;
498}
499
500static int ena_get_rss_hash(struct ena_com_dev *ena_dev,
501 struct ethtool_rxnfc *cmd)
502{
503 enum ena_admin_flow_hash_proto proto;
504 u16 hash_fields;
505 int rc;
506
507 cmd->data = 0;
508
509 switch (cmd->flow_type) {
510 case TCP_V4_FLOW:
511 proto = ENA_ADMIN_RSS_TCP4;
512 break;
513 case UDP_V4_FLOW:
514 proto = ENA_ADMIN_RSS_UDP4;
515 break;
516 case TCP_V6_FLOW:
517 proto = ENA_ADMIN_RSS_TCP6;
518 break;
519 case UDP_V6_FLOW:
520 proto = ENA_ADMIN_RSS_UDP6;
521 break;
522 case IPV4_FLOW:
523 proto = ENA_ADMIN_RSS_IP4;
524 break;
525 case IPV6_FLOW:
526 proto = ENA_ADMIN_RSS_IP6;
527 break;
528 case ETHER_FLOW:
529 proto = ENA_ADMIN_RSS_NOT_IP;
530 break;
531 case AH_V4_FLOW:
532 case ESP_V4_FLOW:
533 case AH_V6_FLOW:
534 case ESP_V6_FLOW:
535 case SCTP_V4_FLOW:
536 case AH_ESP_V4_FLOW:
537 return -EOPNOTSUPP;
538 default:
539 return -EINVAL;
540 }
541
542 rc = ena_com_get_hash_ctrl(ena_dev, proto, &hash_fields);
543 if (rc) {
544 /* If device don't have permission, return unsupported */
545 if (rc == -EPERM)
546 rc = -EOPNOTSUPP;
547 return rc;
548 }
549
550 cmd->data = ena_flow_hash_to_flow_type(hash_fields);
551
552 return 0;
553}
554
555static int ena_set_rss_hash(struct ena_com_dev *ena_dev,
556 struct ethtool_rxnfc *cmd)
557{
558 enum ena_admin_flow_hash_proto proto;
559 u16 hash_fields;
560
561 switch (cmd->flow_type) {
562 case TCP_V4_FLOW:
563 proto = ENA_ADMIN_RSS_TCP4;
564 break;
565 case UDP_V4_FLOW:
566 proto = ENA_ADMIN_RSS_UDP4;
567 break;
568 case TCP_V6_FLOW:
569 proto = ENA_ADMIN_RSS_TCP6;
570 break;
571 case UDP_V6_FLOW:
572 proto = ENA_ADMIN_RSS_UDP6;
573 break;
574 case IPV4_FLOW:
575 proto = ENA_ADMIN_RSS_IP4;
576 break;
577 case IPV6_FLOW:
578 proto = ENA_ADMIN_RSS_IP6;
579 break;
580 case ETHER_FLOW:
581 proto = ENA_ADMIN_RSS_NOT_IP;
582 break;
583 case AH_V4_FLOW:
584 case ESP_V4_FLOW:
585 case AH_V6_FLOW:
586 case ESP_V6_FLOW:
587 case SCTP_V4_FLOW:
588 case AH_ESP_V4_FLOW:
589 return -EOPNOTSUPP;
590 default:
591 return -EINVAL;
592 }
593
594 hash_fields = ena_flow_data_to_flow_hash(cmd->data);
595
596 return ena_com_fill_hash_ctrl(ena_dev, proto, hash_fields);
597}
598
599static int ena_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info)
600{
601 struct ena_adapter *adapter = netdev_priv(netdev);
602 int rc = 0;
603
604 switch (info->cmd) {
605 case ETHTOOL_SRXFH:
606 rc = ena_set_rss_hash(adapter->ena_dev, info);
607 break;
608 case ETHTOOL_SRXCLSRLDEL:
609 case ETHTOOL_SRXCLSRLINS:
610 default:
611 netif_err(adapter, drv, netdev,
612 "Command parameter %d is not supported\n", info->cmd);
613 rc = -EOPNOTSUPP;
614 }
615
616 return (rc == -EPERM) ? -EOPNOTSUPP : rc;
617}
618
619static int ena_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
620 u32 *rules)
621{
622 struct ena_adapter *adapter = netdev_priv(netdev);
623 int rc = 0;
624
625 switch (info->cmd) {
626 case ETHTOOL_GRXRINGS:
627 info->data = adapter->num_queues;
628 rc = 0;
629 break;
630 case ETHTOOL_GRXFH:
631 rc = ena_get_rss_hash(adapter->ena_dev, info);
632 break;
633 case ETHTOOL_GRXCLSRLCNT:
634 case ETHTOOL_GRXCLSRULE:
635 case ETHTOOL_GRXCLSRLALL:
636 default:
637 netif_err(adapter, drv, netdev,
638 "Command parameter %d is not supported\n", info->cmd);
639 rc = -EOPNOTSUPP;
640 }
641
642 return (rc == -EPERM) ? -EOPNOTSUPP : rc;
643}
644
645static u32 ena_get_rxfh_indir_size(struct net_device *netdev)
646{
647 return ENA_RX_RSS_TABLE_SIZE;
648}
649
650static u32 ena_get_rxfh_key_size(struct net_device *netdev)
651{
652 return ENA_HASH_KEY_SIZE;
653}
654
655static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
656 u8 *hfunc)
657{
658 struct ena_adapter *adapter = netdev_priv(netdev);
659 enum ena_admin_hash_functions ena_func;
660 u8 func;
661 int rc;
662
663 rc = ena_com_indirect_table_get(adapter->ena_dev, indir);
664 if (rc)
665 return rc;
666
667 rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key);
668 if (rc)
669 return rc;
670
671 switch (ena_func) {
672 case ENA_ADMIN_TOEPLITZ:
673 func = ETH_RSS_HASH_TOP;
674 break;
675 case ENA_ADMIN_CRC32:
676 func = ETH_RSS_HASH_XOR;
677 break;
678 default:
679 netif_err(adapter, drv, netdev,
680 "Command parameter is not supported\n");
681 return -EOPNOTSUPP;
682 }
683
684 if (hfunc)
685 *hfunc = func;
686
687 return rc;
688}
689
690static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
691 const u8 *key, const u8 hfunc)
692{
693 struct ena_adapter *adapter = netdev_priv(netdev);
694 struct ena_com_dev *ena_dev = adapter->ena_dev;
695 enum ena_admin_hash_functions func;
696 int rc, i;
697
698 if (indir) {
699 for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
700 rc = ena_com_indirect_table_fill_entry(ena_dev,
701 ENA_IO_RXQ_IDX(indir[i]),
702 i);
703 if (unlikely(rc)) {
704 netif_err(adapter, drv, netdev,
705 "Cannot fill indirect table (index is too large)\n");
706 return rc;
707 }
708 }
709
710 rc = ena_com_indirect_table_set(ena_dev);
711 if (rc) {
712 netif_err(adapter, drv, netdev,
713 "Cannot set indirect table\n");
714 return rc == -EPERM ? -EOPNOTSUPP : rc;
715 }
716 }
717
718 switch (hfunc) {
719 case ETH_RSS_HASH_TOP:
720 func = ENA_ADMIN_TOEPLITZ;
721 break;
722 case ETH_RSS_HASH_XOR:
723 func = ENA_ADMIN_CRC32;
724 break;
725 default:
726 netif_err(adapter, drv, netdev, "Unsupported hfunc %d\n",
727 hfunc);
728 return -EOPNOTSUPP;
729 }
730
731 if (key) {
732 rc = ena_com_fill_hash_function(ena_dev, func, key,
733 ENA_HASH_KEY_SIZE,
734 0xFFFFFFFF);
735 if (unlikely(rc)) {
736 netif_err(adapter, drv, netdev, "Cannot fill key\n");
737 return rc == -EPERM ? -EOPNOTSUPP : rc;
738 }
739 }
740
741 return 0;
742}
743
744static void ena_get_channels(struct net_device *netdev,
745 struct ethtool_channels *channels)
746{
747 struct ena_adapter *adapter = netdev_priv(netdev);
748
749 channels->max_rx = ENA_MAX_NUM_IO_QUEUES;
750 channels->max_tx = ENA_MAX_NUM_IO_QUEUES;
751 channels->max_other = 0;
752 channels->max_combined = 0;
753 channels->rx_count = adapter->num_queues;
754 channels->tx_count = adapter->num_queues;
755 channels->other_count = 0;
756 channels->combined_count = 0;
757}
758
759static int ena_get_tunable(struct net_device *netdev,
760 const struct ethtool_tunable *tuna, void *data)
761{
762 struct ena_adapter *adapter = netdev_priv(netdev);
763 int ret = 0;
764
765 switch (tuna->id) {
766 case ETHTOOL_RX_COPYBREAK:
767 *(u32 *)data = adapter->rx_copybreak;
768 break;
769 default:
770 ret = -EINVAL;
771 break;
772 }
773
774 return ret;
775}
776
777static int ena_set_tunable(struct net_device *netdev,
778 const struct ethtool_tunable *tuna,
779 const void *data)
780{
781 struct ena_adapter *adapter = netdev_priv(netdev);
782 int ret = 0;
783 u32 len;
784
785 switch (tuna->id) {
786 case ETHTOOL_RX_COPYBREAK:
787 len = *(u32 *)data;
788 if (len > adapter->netdev->mtu) {
789 ret = -EINVAL;
790 break;
791 }
792 adapter->rx_copybreak = len;
793 break;
794 default:
795 ret = -EINVAL;
796 break;
797 }
798
799 return ret;
800}
801
802static const struct ethtool_ops ena_ethtool_ops = {
803 .get_link_ksettings = ena_get_link_ksettings,
804 .get_drvinfo = ena_get_drvinfo,
805 .get_msglevel = ena_get_msglevel,
806 .set_msglevel = ena_set_msglevel,
807 .get_link = ethtool_op_get_link,
808 .get_coalesce = ena_get_coalesce,
809 .set_coalesce = ena_set_coalesce,
810 .get_ringparam = ena_get_ringparam,
811 .get_sset_count = ena_get_sset_count,
812 .get_strings = ena_get_strings,
813 .get_ethtool_stats = ena_get_ethtool_stats,
814 .get_rxnfc = ena_get_rxnfc,
815 .set_rxnfc = ena_set_rxnfc,
816 .get_rxfh_indir_size = ena_get_rxfh_indir_size,
817 .get_rxfh_key_size = ena_get_rxfh_key_size,
818 .get_rxfh = ena_get_rxfh,
819 .set_rxfh = ena_set_rxfh,
820 .get_channels = ena_get_channels,
821 .get_tunable = ena_get_tunable,
822 .set_tunable = ena_set_tunable,
823};
824
825void ena_set_ethtool_ops(struct net_device *netdev)
826{
827 netdev->ethtool_ops = &ena_ethtool_ops;
828}
829
830static void ena_dump_stats_ex(struct ena_adapter *adapter, u8 *buf)
831{
832 struct net_device *netdev = adapter->netdev;
833 u8 *strings_buf;
834 u64 *data_buf;
835 int strings_num;
836 int i, rc;
837
838 strings_num = ena_get_sset_count(netdev, ETH_SS_STATS);
839 if (strings_num <= 0) {
840 netif_err(adapter, drv, netdev, "Can't get stats num\n");
841 return;
842 }
843
844 strings_buf = devm_kzalloc(&adapter->pdev->dev,
845 strings_num * ETH_GSTRING_LEN,
846 GFP_ATOMIC);
847 if (!strings_buf) {
848 netif_err(adapter, drv, netdev,
849 "failed to alloc strings_buf\n");
850 return;
851 }
852
853 data_buf = devm_kzalloc(&adapter->pdev->dev,
854 strings_num * sizeof(u64),
855 GFP_ATOMIC);
856 if (!data_buf) {
857 netif_err(adapter, drv, netdev,
858 "failed to allocate data buf\n");
859 devm_kfree(&adapter->pdev->dev, strings_buf);
860 return;
861 }
862
863 ena_get_strings(netdev, ETH_SS_STATS, strings_buf);
864 ena_get_ethtool_stats(netdev, NULL, data_buf);
865
866 /* If there is a buffer, dump stats, otherwise print them to dmesg */
867 if (buf)
868 for (i = 0; i < strings_num; i++) {
869 rc = snprintf(buf, ETH_GSTRING_LEN + sizeof(u64),
870 "%s %llu\n",
871 strings_buf + i * ETH_GSTRING_LEN,
872 data_buf[i]);
873 buf += rc;
874 }
875 else
876 for (i = 0; i < strings_num; i++)
877 netif_err(adapter, drv, netdev, "%s: %llu\n",
878 strings_buf + i * ETH_GSTRING_LEN,
879 data_buf[i]);
880
881 devm_kfree(&adapter->pdev->dev, strings_buf);
882 devm_kfree(&adapter->pdev->dev, data_buf);
883}
884
885void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf)
886{
887 if (!buf)
888 return;
889
890 ena_dump_stats_ex(adapter, buf);
891}
892
893void ena_dump_stats_to_dmesg(struct ena_adapter *adapter)
894{
895 ena_dump_stats_ex(adapter, NULL);
896}
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