1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2015-2023 Amazon.com, Inc. or its affiliates.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include "opt_rss.h"
33
34 #include "ena_rss.h"
35 #include "ena_sysctl.h"
36
37 static void ena_sysctl_add_wd(struct ena_adapter *);
38 static void ena_sysctl_add_stats(struct ena_adapter *);
39 static void ena_sysctl_add_eni_metrics(struct ena_adapter *);
40 static void ena_sysctl_add_customer_metrics(struct ena_adapter *);
41 static void ena_sysctl_add_srd_info(struct ena_adapter *);
42 static void ena_sysctl_add_tuneables(struct ena_adapter *);
43 static void ena_sysctl_add_irq_affinity(struct ena_adapter *);
44 /* Kernel option RSS prevents manipulation of key hash and indirection table. */
45 #ifndef RSS
46 static void ena_sysctl_add_rss(struct ena_adapter *);
47 #endif
48 static int ena_sysctl_buf_ring_size(SYSCTL_HANDLER_ARGS);
49 static int ena_sysctl_rx_queue_size(SYSCTL_HANDLER_ARGS);
50 static int ena_sysctl_io_queues_nb(SYSCTL_HANDLER_ARGS);
51 static int ena_sysctl_irq_base_cpu(SYSCTL_HANDLER_ARGS);
52 static int ena_sysctl_irq_cpu_stride(SYSCTL_HANDLER_ARGS);
53 static int ena_sysctl_metrics_interval(SYSCTL_HANDLER_ARGS);
54 #ifndef RSS
55 static int ena_sysctl_rss_key(SYSCTL_HANDLER_ARGS);
56 static int ena_sysctl_rss_indir_table(SYSCTL_HANDLER_ARGS);
57 #endif
58
59 /* Limit max ENA sample rate to be an hour. */
60 #define ENA_METRICS_MAX_SAMPLE_INTERVAL 3600
61 #define ENA_HASH_KEY_MSG_SIZE (ENA_HASH_KEY_SIZE * 2 + 1)
62
63 #define SYSCTL_GSTRING_LEN 128
64
65 #define ENA_METRIC_ENI_ENTRY(stat, desc) { \
66 .name = #stat, \
67 .description = #desc, \
68 }
69
70 #define ENA_STAT_ENTRY(stat, desc, stat_type) { \
71 .name = #stat, \
72 .description = #desc, \
73 .stat_offset = offsetof(struct ena_admin_##stat_type, stat) / sizeof(u64), \
74 }
75
76 #define ENA_STAT_ENA_SRD_ENTRY(stat, desc) \
77 ENA_STAT_ENTRY(stat, desc, ena_srd_stats)
78
79 struct ena_hw_metrics {
80 char name[SYSCTL_GSTRING_LEN];
81 char description[SYSCTL_GSTRING_LEN];
82 };
83
84 struct ena_srd_metrics {
85 char name[SYSCTL_GSTRING_LEN];
86 char description[SYSCTL_GSTRING_LEN];
87 int stat_offset;
88 };
89
90 static const struct ena_srd_metrics ena_srd_stats_strings[] = {
91 ENA_STAT_ENA_SRD_ENTRY(
92 ena_srd_tx_pkts, Number of packets transmitted over ENA SRD),
93 ENA_STAT_ENA_SRD_ENTRY(
94 ena_srd_eligible_tx_pkts, Number of packets transmitted or could
95 have been transmitted over ENA SRD),
96 ENA_STAT_ENA_SRD_ENTRY(
97 ena_srd_rx_pkts, Number of packets received over ENA SRD),
98 ENA_STAT_ENA_SRD_ENTRY(
99 ena_srd_resource_utilization, Percentage of the ENA SRD resources
100 that are in use),
101 };
102
103 static const struct ena_hw_metrics ena_hw_stats_strings[] = {
104 ENA_METRIC_ENI_ENTRY(
105 bw_in_allowance_exceeded, Inbound BW allowance exceeded),
106 ENA_METRIC_ENI_ENTRY(
107 bw_out_allowance_exceeded, Outbound BW allowance exceeded),
108 ENA_METRIC_ENI_ENTRY(
109 pps_allowance_exceeded, PPS allowance exceeded),
110 ENA_METRIC_ENI_ENTRY(
111 conntrack_allowance_exceeded, Connection tracking allowance exceeded),
112 ENA_METRIC_ENI_ENTRY(
113 linklocal_allowance_exceeded, Linklocal packet rate allowance),
114 ENA_METRIC_ENI_ENTRY(
115 conntrack_allowance_available, Number of available conntracks),
116 };
117
118 #ifndef ARRAY_SIZE
119 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
120 #endif
121
122 #define ENA_CUSTOMER_METRICS_ARRAY_SIZE ARRAY_SIZE(ena_hw_stats_strings)
123 #define ENA_SRD_METRICS_ARRAY_SIZE ARRAY_SIZE(ena_srd_stats_strings)
124
125 static SYSCTL_NODE(_hw, OID_AUTO, ena, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
126 "ENA driver parameters");
127
128 /*
129 * Logging level for changing verbosity of the output
130 */
131 int ena_log_level = ENA_INFO;
132 SYSCTL_INT(_hw_ena, OID_AUTO, log_level, CTLFLAG_RWTUN, &ena_log_level, 0,
133 "Logging level indicating verbosity of the logs");
134
135 SYSCTL_CONST_STRING(_hw_ena, OID_AUTO, driver_version, CTLFLAG_RD,
136 ENA_DRV_MODULE_VERSION, "ENA driver version");
137
138 /*
139 * Use 9k mbufs for the Rx buffers. Default to 0 (use page size mbufs instead).
140 * Using 9k mbufs in low memory conditions might cause allocation to take a lot
141 * of time and lead to the OS instability as it needs to look for the contiguous
142 * pages.
143 * However, page size mbufs has a bit smaller throughput than 9k mbufs, so if
144 * the network performance is the priority, the 9k mbufs can be used.
145 */
146 int ena_enable_9k_mbufs = 0;
147 SYSCTL_INT(_hw_ena, OID_AUTO, enable_9k_mbufs, CTLFLAG_RDTUN,
148 &ena_enable_9k_mbufs, 0, "Use 9 kB mbufs for Rx descriptors");
149
150 /*
151 * Force the driver to use large LLQ (Low Latency Queue) header. Defaults to
152 * false. This option may be important for platforms, which often handle packet
153 * headers on Tx with total header size greater than 96B, as it may
154 * reduce the latency.
155 * It also reduces the maximum Tx queue size by half, so it may cause more Tx
156 * packet drops.
157 */
158 bool ena_force_large_llq_header = false;
159 SYSCTL_BOOL(_hw_ena, OID_AUTO, force_large_llq_header, CTLFLAG_RDTUN,
160 &ena_force_large_llq_header, 0,
161 "Increases maximum supported header size in LLQ mode to 224 bytes, while reducing the maximum Tx queue size by half.\n");
162
163 int ena_rss_table_size = ENA_RX_RSS_TABLE_SIZE;
164
ena_sysctl_allocate_customer_metrics_buffer(struct ena_adapter * adapter)165 int ena_sysctl_allocate_customer_metrics_buffer(struct ena_adapter *adapter)
166 {
167 int rc = 0;
168
169 adapter->customer_metrics_array = malloc((sizeof(u64) * ENA_CUSTOMER_METRICS_ARRAY_SIZE),
170 M_DEVBUF, M_NOWAIT | M_ZERO);
171 if (unlikely(adapter->customer_metrics_array == NULL))
172 rc = ENOMEM;
173
174 return rc;
175 }
176 void
ena_sysctl_add_nodes(struct ena_adapter * adapter)177 ena_sysctl_add_nodes(struct ena_adapter *adapter)
178 {
179 struct ena_com_dev *dev = adapter->ena_dev;
180
181 if (ena_com_get_cap(dev, ENA_ADMIN_CUSTOMER_METRICS))
182 ena_sysctl_add_customer_metrics(adapter);
183 else if (ena_com_get_cap(dev, ENA_ADMIN_ENI_STATS))
184 ena_sysctl_add_eni_metrics(adapter);
185
186 if (ena_com_get_cap(adapter->ena_dev, ENA_ADMIN_ENA_SRD_INFO))
187 ena_sysctl_add_srd_info(adapter);
188
189 ena_sysctl_add_wd(adapter);
190 ena_sysctl_add_stats(adapter);
191 ena_sysctl_add_tuneables(adapter);
192 ena_sysctl_add_irq_affinity(adapter);
193 #ifndef RSS
194 ena_sysctl_add_rss(adapter);
195 #endif
196 }
197
198 static void
ena_sysctl_add_wd(struct ena_adapter * adapter)199 ena_sysctl_add_wd(struct ena_adapter *adapter)
200 {
201 device_t dev;
202
203 struct sysctl_ctx_list *ctx;
204 struct sysctl_oid *tree;
205 struct sysctl_oid_list *child;
206
207 dev = adapter->pdev;
208
209 ctx = device_get_sysctl_ctx(dev);
210 tree = device_get_sysctl_tree(dev);
211 child = SYSCTL_CHILDREN(tree);
212
213 /* Sysctl calls for Watchdog service */
214 SYSCTL_ADD_INT(ctx, child, OID_AUTO, "wd_active", CTLFLAG_RWTUN,
215 &adapter->wd_active, 0, "Watchdog is active");
216
217 SYSCTL_ADD_QUAD(ctx, child, OID_AUTO, "keep_alive_timeout",
218 CTLFLAG_RWTUN, &adapter->keep_alive_timeout,
219 "Timeout for Keep Alive messages");
220
221 SYSCTL_ADD_QUAD(ctx, child, OID_AUTO, "missing_tx_timeout",
222 CTLFLAG_RWTUN, &adapter->missing_tx_timeout,
223 "Timeout for TX completion");
224
225 SYSCTL_ADD_U32(ctx, child, OID_AUTO, "missing_tx_max_queues",
226 CTLFLAG_RWTUN, &adapter->missing_tx_max_queues, 0,
227 "Number of TX queues to check per run");
228
229 SYSCTL_ADD_U32(ctx, child, OID_AUTO, "missing_tx_threshold",
230 CTLFLAG_RWTUN, &adapter->missing_tx_threshold, 0,
231 "Max number of timeouted packets");
232 }
233
234 static void
ena_sysctl_add_stats(struct ena_adapter * adapter)235 ena_sysctl_add_stats(struct ena_adapter *adapter)
236 {
237 device_t dev;
238
239 struct ena_ring *tx_ring;
240 struct ena_ring *rx_ring;
241
242 struct ena_hw_stats *hw_stats;
243 struct ena_stats_dev *dev_stats;
244 struct ena_stats_tx *tx_stats;
245 struct ena_stats_rx *rx_stats;
246 struct ena_com_stats_admin *admin_stats;
247
248 struct sysctl_ctx_list *ctx;
249 struct sysctl_oid *tree;
250 struct sysctl_oid_list *child;
251
252 struct sysctl_oid *queue_node, *tx_node, *rx_node, *hw_node;
253 struct sysctl_oid *admin_node;
254 struct sysctl_oid_list *queue_list, *tx_list, *rx_list, *hw_list;
255 struct sysctl_oid_list *admin_list;
256
257 #define QUEUE_NAME_LEN 32
258 char namebuf[QUEUE_NAME_LEN];
259 int i;
260
261 dev = adapter->pdev;
262
263 ctx = device_get_sysctl_ctx(dev);
264 tree = device_get_sysctl_tree(dev);
265 child = SYSCTL_CHILDREN(tree);
266
267 tx_ring = adapter->tx_ring;
268 rx_ring = adapter->rx_ring;
269
270 hw_stats = &adapter->hw_stats;
271 dev_stats = &adapter->dev_stats;
272 admin_stats = &adapter->ena_dev->admin_queue.stats;
273
274 SYSCTL_ADD_COUNTER_U64(ctx, child, OID_AUTO, "wd_expired", CTLFLAG_RD,
275 &dev_stats->wd_expired, "Watchdog expiry count");
276 SYSCTL_ADD_COUNTER_U64(ctx, child, OID_AUTO, "interface_up", CTLFLAG_RD,
277 &dev_stats->interface_up, "Network interface up count");
278 SYSCTL_ADD_COUNTER_U64(ctx, child, OID_AUTO, "interface_down",
279 CTLFLAG_RD, &dev_stats->interface_down,
280 "Network interface down count");
281 SYSCTL_ADD_COUNTER_U64(ctx, child, OID_AUTO, "admin_q_pause",
282 CTLFLAG_RD, &dev_stats->admin_q_pause, "Admin queue pauses");
283
284 for (i = 0; i < adapter->num_io_queues; ++i, ++tx_ring, ++rx_ring) {
285 snprintf(namebuf, QUEUE_NAME_LEN, "queue%d", i);
286
287 queue_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
288 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
289 queue_list = SYSCTL_CHILDREN(queue_node);
290
291 adapter->que[i].oid = queue_node;
292
293 #ifdef RSS
294 /* Common stats */
295 SYSCTL_ADD_INT(ctx, queue_list, OID_AUTO, "cpu", CTLFLAG_RD,
296 &adapter->que[i].cpu, 0, "CPU affinity");
297 SYSCTL_ADD_INT(ctx, queue_list, OID_AUTO, "domain", CTLFLAG_RD,
298 &adapter->que[i].domain, 0, "NUMA domain");
299 #endif
300
301 /* TX specific stats */
302 tx_node = SYSCTL_ADD_NODE(ctx, queue_list, OID_AUTO, "tx_ring",
303 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "TX ring");
304 tx_list = SYSCTL_CHILDREN(tx_node);
305
306 tx_stats = &tx_ring->tx_stats;
307
308 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "count",
309 CTLFLAG_RD, &tx_stats->cnt, "Packets sent");
310 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "bytes",
311 CTLFLAG_RD, &tx_stats->bytes, "Bytes sent");
312 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
313 "prepare_ctx_err", CTLFLAG_RD, &tx_stats->prepare_ctx_err,
314 "TX buffer preparation failures");
315 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
316 "dma_mapping_err", CTLFLAG_RD, &tx_stats->dma_mapping_err,
317 "DMA mapping failures");
318 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "doorbells",
319 CTLFLAG_RD, &tx_stats->doorbells, "Queue doorbells");
320 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
321 "missing_tx_comp", CTLFLAG_RD, &tx_stats->missing_tx_comp,
322 "TX completions missed");
323 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "bad_req_id",
324 CTLFLAG_RD, &tx_stats->bad_req_id, "Bad request id count");
325 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "mbuf_collapses",
326 CTLFLAG_RD, &tx_stats->collapse, "Mbuf collapse count");
327 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
328 "mbuf_collapse_err", CTLFLAG_RD, &tx_stats->collapse_err,
329 "Mbuf collapse failures");
330 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "queue_wakeups",
331 CTLFLAG_RD, &tx_stats->queue_wakeup, "Queue wakeups");
332 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO, "queue_stops",
333 CTLFLAG_RD, &tx_stats->queue_stop, "Queue stops");
334 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
335 "llq_buffer_copy", CTLFLAG_RD, &tx_stats->llq_buffer_copy,
336 "Header copies for llq transaction");
337 SYSCTL_ADD_COUNTER_U64(ctx, tx_list, OID_AUTO,
338 "unmask_interrupt_num", CTLFLAG_RD,
339 &tx_stats->unmask_interrupt_num,
340 "Unmasked interrupt count");
341
342 /* RX specific stats */
343 rx_node = SYSCTL_ADD_NODE(ctx, queue_list, OID_AUTO, "rx_ring",
344 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "RX ring");
345 rx_list = SYSCTL_CHILDREN(rx_node);
346
347 rx_stats = &rx_ring->rx_stats;
348
349 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "count",
350 CTLFLAG_RD, &rx_stats->cnt, "Packets received");
351 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "bytes",
352 CTLFLAG_RD, &rx_stats->bytes, "Bytes received");
353 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "refil_partial",
354 CTLFLAG_RD, &rx_stats->refil_partial,
355 "Partial refilled mbufs");
356 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "csum_bad",
357 CTLFLAG_RD, &rx_stats->csum_bad, "Bad RX checksum");
358 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO,
359 "mbuf_alloc_fail", CTLFLAG_RD, &rx_stats->mbuf_alloc_fail,
360 "Failed mbuf allocs");
361 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO,
362 "mjum_alloc_fail", CTLFLAG_RD, &rx_stats->mjum_alloc_fail,
363 "Failed jumbo mbuf allocs");
364 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO,
365 "dma_mapping_err", CTLFLAG_RD, &rx_stats->dma_mapping_err,
366 "DMA mapping errors");
367 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "bad_desc_num",
368 CTLFLAG_RD, &rx_stats->bad_desc_num,
369 "Bad descriptor count");
370 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "bad_req_id",
371 CTLFLAG_RD, &rx_stats->bad_req_id, "Bad request id count");
372 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "empty_rx_ring",
373 CTLFLAG_RD, &rx_stats->empty_rx_ring,
374 "RX descriptors depletion count");
375 SYSCTL_ADD_COUNTER_U64(ctx, rx_list, OID_AUTO, "csum_good",
376 CTLFLAG_RD, &rx_stats->csum_good,
377 "Valid RX checksum calculations");
378 }
379
380 /* Stats read from device */
381 hw_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "hw_stats",
382 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Statistics from hardware");
383 hw_list = SYSCTL_CHILDREN(hw_node);
384
385 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "rx_packets", CTLFLAG_RD,
386 &hw_stats->rx_packets, "Packets received");
387 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "tx_packets", CTLFLAG_RD,
388 &hw_stats->tx_packets, "Packets transmitted");
389 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "rx_bytes", CTLFLAG_RD,
390 &hw_stats->rx_bytes, "Bytes received");
391 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "tx_bytes", CTLFLAG_RD,
392 &hw_stats->tx_bytes, "Bytes transmitted");
393 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "rx_drops", CTLFLAG_RD,
394 &hw_stats->rx_drops, "Receive packet drops");
395 SYSCTL_ADD_COUNTER_U64(ctx, hw_list, OID_AUTO, "tx_drops", CTLFLAG_RD,
396 &hw_stats->tx_drops, "Transmit packet drops");
397
398 /* ENA Admin queue stats */
399 admin_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "admin_stats",
400 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "ENA Admin Queue statistics");
401 admin_list = SYSCTL_CHILDREN(admin_node);
402
403 SYSCTL_ADD_U64(ctx, admin_list, OID_AUTO, "aborted_cmd", CTLFLAG_RD,
404 &admin_stats->aborted_cmd, 0, "Aborted commands");
405 SYSCTL_ADD_U64(ctx, admin_list, OID_AUTO, "sumbitted_cmd", CTLFLAG_RD,
406 &admin_stats->submitted_cmd, 0, "Submitted commands");
407 SYSCTL_ADD_U64(ctx, admin_list, OID_AUTO, "completed_cmd", CTLFLAG_RD,
408 &admin_stats->completed_cmd, 0, "Completed commands");
409 SYSCTL_ADD_U64(ctx, admin_list, OID_AUTO, "out_of_space", CTLFLAG_RD,
410 &admin_stats->out_of_space, 0, "Queue out of space");
411 SYSCTL_ADD_U64(ctx, admin_list, OID_AUTO, "no_completion", CTLFLAG_RD,
412 &admin_stats->no_completion, 0, "Commands not completed");
413 }
414
415 static void
ena_sysctl_add_srd_info(struct ena_adapter * adapter)416 ena_sysctl_add_srd_info(struct ena_adapter *adapter)
417 {
418 device_t dev;
419
420 struct sysctl_oid *ena_srd_info;
421 struct sysctl_oid_list *srd_list;
422
423 struct sysctl_ctx_list *ctx;
424 struct sysctl_oid *tree;
425 struct sysctl_oid_list *child;
426
427 struct ena_admin_ena_srd_stats *srd_stats_ptr;
428 struct ena_srd_metrics cur_stat_strings;
429
430 int i;
431
432 dev = adapter->pdev;
433
434 ctx = device_get_sysctl_ctx(dev);
435 tree = device_get_sysctl_tree(dev);
436 child = SYSCTL_CHILDREN(tree);
437
438 ena_srd_info = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "ena_srd_info",
439 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "ENA's SRD information");
440 srd_list = SYSCTL_CHILDREN(ena_srd_info);
441
442 SYSCTL_ADD_U64(ctx, srd_list, OID_AUTO, "ena_srd_mode",
443 CTLFLAG_RD, &adapter->ena_srd_info.flags, 0,
444 "Describes which ENA-express features are enabled");
445
446 srd_stats_ptr = &adapter->ena_srd_info.ena_srd_stats;
447
448 for (i = 0 ; i < ENA_SRD_METRICS_ARRAY_SIZE; i++) {
449 cur_stat_strings = ena_srd_stats_strings[i];
450 SYSCTL_ADD_U64(ctx, srd_list, OID_AUTO, cur_stat_strings.name,
451 CTLFLAG_RD, (u64 *)srd_stats_ptr + cur_stat_strings.stat_offset,
452 0, cur_stat_strings.description);
453 }
454 }
455
456 static void
ena_sysctl_add_customer_metrics(struct ena_adapter * adapter)457 ena_sysctl_add_customer_metrics(struct ena_adapter *adapter)
458 {
459 device_t dev;
460 struct ena_com_dev *ena_dev;
461
462 struct sysctl_ctx_list *ctx;
463 struct sysctl_oid *tree;
464 struct sysctl_oid_list *child;
465
466 struct sysctl_oid *customer_metric;
467 struct sysctl_oid_list *customer_list;
468
469 int i;
470
471 dev = adapter->pdev;
472 ena_dev = adapter->ena_dev;
473
474 ctx = device_get_sysctl_ctx(dev);
475 tree = device_get_sysctl_tree(dev);
476 child = SYSCTL_CHILDREN(tree);
477 customer_metric = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "customer_metrics",
478 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "ENA's customer metrics");
479 customer_list = SYSCTL_CHILDREN(customer_metric);
480
481 for (i = 0; i < ENA_CUSTOMER_METRICS_ARRAY_SIZE; i++) {
482 if (ena_com_get_customer_metric_support(ena_dev, i)) {
483 SYSCTL_ADD_U64(ctx, customer_list, OID_AUTO, ena_hw_stats_strings[i].name,
484 CTLFLAG_RD, &adapter->customer_metrics_array[i], 0,
485 ena_hw_stats_strings[i].description);
486 }
487 }
488 }
489
490 static void
ena_sysctl_add_eni_metrics(struct ena_adapter * adapter)491 ena_sysctl_add_eni_metrics(struct ena_adapter *adapter)
492 {
493 device_t dev;
494 struct ena_admin_eni_stats *eni_metrics;
495
496 struct sysctl_ctx_list *ctx;
497 struct sysctl_oid *tree;
498 struct sysctl_oid_list *child;
499
500 struct sysctl_oid *eni_node;
501 struct sysctl_oid_list *eni_list;
502
503 dev = adapter->pdev;
504
505 ctx = device_get_sysctl_ctx(dev);
506 tree = device_get_sysctl_tree(dev);
507 child = SYSCTL_CHILDREN(tree);
508
509 eni_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "eni_metrics",
510 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "ENA's ENI metrics");
511 eni_list = SYSCTL_CHILDREN(eni_node);
512
513 eni_metrics = &adapter->eni_metrics;
514
515 SYSCTL_ADD_U64(ctx, eni_list, OID_AUTO, "bw_in_allowance_exceeded",
516 CTLFLAG_RD, &eni_metrics->bw_in_allowance_exceeded, 0,
517 "Inbound BW allowance exceeded");
518 SYSCTL_ADD_U64(ctx, eni_list, OID_AUTO, "bw_out_allowance_exceeded",
519 CTLFLAG_RD, &eni_metrics->bw_out_allowance_exceeded, 0,
520 "Outbound BW allowance exceeded");
521 SYSCTL_ADD_U64(ctx, eni_list, OID_AUTO, "pps_allowance_exceeded",
522 CTLFLAG_RD, &eni_metrics->pps_allowance_exceeded, 0,
523 "PPS allowance exceeded");
524 SYSCTL_ADD_U64(ctx, eni_list, OID_AUTO, "conntrack_allowance_exceeded",
525 CTLFLAG_RD, &eni_metrics->conntrack_allowance_exceeded, 0,
526 "Connection tracking allowance exceeded");
527 SYSCTL_ADD_U64(ctx, eni_list, OID_AUTO, "linklocal_allowance_exceeded",
528 CTLFLAG_RD, &eni_metrics->linklocal_allowance_exceeded, 0,
529 "Linklocal packet rate allowance exceeded");
530 }
531
532 static void
ena_sysctl_add_tuneables(struct ena_adapter * adapter)533 ena_sysctl_add_tuneables(struct ena_adapter *adapter)
534 {
535 device_t dev;
536
537 struct sysctl_ctx_list *ctx;
538 struct sysctl_oid *tree;
539 struct sysctl_oid_list *child;
540
541 dev = adapter->pdev;
542
543 ctx = device_get_sysctl_ctx(dev);
544 tree = device_get_sysctl_tree(dev);
545 child = SYSCTL_CHILDREN(tree);
546
547 /* Tuneable number of buffers in the buf-ring (drbr) */
548 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "buf_ring_size",
549 CTLTYPE_U32 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
550 ena_sysctl_buf_ring_size, "I",
551 "Size of the Tx buffer ring (drbr).");
552
553 /* Tuneable number of the Rx ring size */
554 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_queue_size",
555 CTLTYPE_U32 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
556 ena_sysctl_rx_queue_size, "I",
557 "Size of the Rx ring. The size should be a power of 2.");
558
559 /* Tuneable number of IO queues */
560 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "io_queues_nb",
561 CTLTYPE_U32 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
562 ena_sysctl_io_queues_nb, "I", "Number of IO queues.");
563
564 /*
565 * Tuneable, which determines how often ENA metrics will be read.
566 * 0 means it's turned off. Maximum allowed value is limited by:
567 * ENA_METRICS_MAX_SAMPLE_INTERVAL.
568 */
569 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "stats_sample_interval",
570 CTLTYPE_U16 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
571 ena_sysctl_metrics_interval, "SU",
572 "Interval in seconds for updating Netword interface metrics. 0 turns off the update.");
573 }
574
575 /* Kernel option RSS prevents manipulation of key hash and indirection table. */
576 #ifndef RSS
577 static void
ena_sysctl_add_rss(struct ena_adapter * adapter)578 ena_sysctl_add_rss(struct ena_adapter *adapter)
579 {
580 device_t dev;
581
582 struct sysctl_ctx_list *ctx;
583 struct sysctl_oid *tree;
584 struct sysctl_oid_list *child;
585
586 dev = adapter->pdev;
587
588 ctx = device_get_sysctl_ctx(dev);
589 tree = device_get_sysctl_tree(dev);
590 child = SYSCTL_CHILDREN(tree);
591
592 /* RSS options */
593 tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "rss",
594 CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, "Receive Side Scaling options.");
595 child = SYSCTL_CHILDREN(tree);
596
597 /* RSS hash key */
598 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "key",
599 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
600 ena_sysctl_rss_key, "A", "RSS key.");
601
602 /* Tuneable RSS indirection table */
603 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "indir_table",
604 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
605 ena_sysctl_rss_indir_table, "A", "RSS indirection table.");
606
607 /* RSS indirection table size */
608 SYSCTL_ADD_INT(ctx, child, OID_AUTO, "indir_table_size",
609 CTLFLAG_RD | CTLFLAG_MPSAFE, &ena_rss_table_size, 0,
610 "RSS indirection table size.");
611 }
612 #endif /* RSS */
613
614 static void
ena_sysctl_add_irq_affinity(struct ena_adapter * adapter)615 ena_sysctl_add_irq_affinity(struct ena_adapter *adapter)
616 {
617 device_t dev;
618
619 struct sysctl_ctx_list *ctx;
620 struct sysctl_oid *tree;
621 struct sysctl_oid_list *child;
622
623 dev = adapter->pdev;
624
625 ctx = device_get_sysctl_ctx(dev);
626 tree = device_get_sysctl_tree(dev);
627 child = SYSCTL_CHILDREN(tree);
628
629 tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "irq_affinity",
630 CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, "Decide base CPU and stride for irqs affinity.");
631 child = SYSCTL_CHILDREN(tree);
632
633 /* Add base cpu leaf */
634 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "base_cpu",
635 CTLTYPE_S32 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
636 ena_sysctl_irq_base_cpu, "I", "Base cpu index for setting irq affinity.");
637
638 /* Add cpu stride leaf */
639 SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "cpu_stride",
640 CTLTYPE_S32 | CTLFLAG_RW | CTLFLAG_MPSAFE, adapter, 0,
641 ena_sysctl_irq_cpu_stride, "I", "Distance between irqs when setting affinity.");
642 }
643
644
645 /*
646 * ena_sysctl_update_queue_node_nb - Register/unregister sysctl queue nodes.
647 *
648 * Whether the nodes are registered or unregistered depends on a delta between
649 * the `old` and `new` parameters, representing the number of queues.
650 *
651 * This function is used to hide sysctl attributes for queue nodes which aren't
652 * currently used by the HW (e.g. after a call to `ena_sysctl_io_queues_nb`).
653 *
654 * NOTE:
655 * All unregistered nodes must be registered again at detach, i.e. by a call to
656 * this function.
657 */
658 void
ena_sysctl_update_queue_node_nb(struct ena_adapter * adapter,int old,int new)659 ena_sysctl_update_queue_node_nb(struct ena_adapter *adapter, int old, int new)
660 {
661 struct sysctl_oid *oid;
662 int min, max, i;
663
664 min = MIN(old, new);
665 max = MIN(MAX(old, new), adapter->max_num_io_queues);
666
667 for (i = min; i < max; ++i) {
668 oid = adapter->que[i].oid;
669
670 sysctl_wlock();
671 if (old > new)
672 sysctl_unregister_oid(oid);
673 else
674 sysctl_register_oid(oid);
675 sysctl_wunlock();
676 }
677 }
678
679 static int
ena_sysctl_buf_ring_size(SYSCTL_HANDLER_ARGS)680 ena_sysctl_buf_ring_size(SYSCTL_HANDLER_ARGS)
681 {
682 struct ena_adapter *adapter = arg1;
683 uint32_t val;
684 int error;
685
686 ENA_LOCK_LOCK();
687 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
688 error = EINVAL;
689 goto unlock;
690 }
691
692 val = 0;
693 error = sysctl_wire_old_buffer(req, sizeof(val));
694 if (error == 0) {
695 val = adapter->buf_ring_size;
696 error = sysctl_handle_32(oidp, &val, 0, req);
697 }
698 if (error != 0 || req->newptr == NULL)
699 goto unlock;
700
701 if (!powerof2(val) || val == 0) {
702 ena_log(adapter->pdev, ERR,
703 "Requested new Tx buffer ring size (%u) is not a power of 2\n",
704 val);
705 error = EINVAL;
706 goto unlock;
707 }
708
709 if (val != adapter->buf_ring_size) {
710 ena_log(adapter->pdev, INFO,
711 "Requested new Tx buffer ring size: %d. Old size: %d\n",
712 val, adapter->buf_ring_size);
713
714 error = ena_update_buf_ring_size(adapter, val);
715 } else {
716 ena_log(adapter->pdev, ERR,
717 "New Tx buffer ring size is the same as already used: %u\n",
718 adapter->buf_ring_size);
719 }
720
721 unlock:
722 ENA_LOCK_UNLOCK();
723
724 return (error);
725 }
726
727 static int
ena_sysctl_rx_queue_size(SYSCTL_HANDLER_ARGS)728 ena_sysctl_rx_queue_size(SYSCTL_HANDLER_ARGS)
729 {
730 struct ena_adapter *adapter = arg1;
731 uint32_t val;
732 int error;
733
734 ENA_LOCK_LOCK();
735 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
736 error = EINVAL;
737 goto unlock;
738 }
739
740 val = 0;
741 error = sysctl_wire_old_buffer(req, sizeof(val));
742 if (error == 0) {
743 val = adapter->requested_rx_ring_size;
744 error = sysctl_handle_32(oidp, &val, 0, req);
745 }
746 if (error != 0 || req->newptr == NULL)
747 goto unlock;
748
749 if (val < ENA_MIN_RING_SIZE || val > adapter->max_rx_ring_size) {
750 ena_log(adapter->pdev, ERR,
751 "Requested new Rx queue size (%u) is out of range: [%u, %u]\n",
752 val, ENA_MIN_RING_SIZE, adapter->max_rx_ring_size);
753 error = EINVAL;
754 goto unlock;
755 }
756
757 /* Check if the parameter is power of 2 */
758 if (!powerof2(val)) {
759 ena_log(adapter->pdev, ERR,
760 "Requested new Rx queue size (%u) is not a power of 2\n",
761 val);
762 error = EINVAL;
763 goto unlock;
764 }
765
766 if (val != adapter->requested_rx_ring_size) {
767 ena_log(adapter->pdev, INFO,
768 "Requested new Rx queue size: %u. Old size: %u\n", val,
769 adapter->requested_rx_ring_size);
770
771 error = ena_update_queue_size(adapter,
772 adapter->requested_tx_ring_size, val);
773 } else {
774 ena_log(adapter->pdev, ERR,
775 "New Rx queue size is the same as already used: %u\n",
776 adapter->requested_rx_ring_size);
777 }
778
779 unlock:
780 ENA_LOCK_UNLOCK();
781
782 return (error);
783 }
784
785 /*
786 * Change number of effectively used IO queues adapter->num_io_queues
787 */
788 static int
ena_sysctl_io_queues_nb(SYSCTL_HANDLER_ARGS)789 ena_sysctl_io_queues_nb(SYSCTL_HANDLER_ARGS)
790 {
791 struct ena_adapter *adapter = arg1;
792 uint32_t old_num_queues, tmp = 0;
793 int error;
794
795 ENA_LOCK_LOCK();
796 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
797 error = EINVAL;
798 goto unlock;
799 }
800
801 error = sysctl_wire_old_buffer(req, sizeof(tmp));
802 if (error == 0) {
803 tmp = adapter->num_io_queues;
804 error = sysctl_handle_int(oidp, &tmp, 0, req);
805 }
806 if (error != 0 || req->newptr == NULL)
807 goto unlock;
808
809 if (tmp == 0) {
810 ena_log(adapter->pdev, ERR,
811 "Requested number of IO queues is zero\n");
812 error = EINVAL;
813 goto unlock;
814 }
815
816 /*
817 * The adapter::max_num_io_queues is the HW capability. The system
818 * resources availability may potentially be a tighter limit. Therefore
819 * the relation `adapter::max_num_io_queues >= adapter::msix_vecs`
820 * always holds true, while the `adapter::msix_vecs` is variable across
821 * device reset (`ena_destroy_device()` + `ena_restore_device()`).
822 */
823 if (tmp > (adapter->msix_vecs - ENA_ADMIN_MSIX_VEC)) {
824 ena_log(adapter->pdev, ERR,
825 "Requested number of IO queues is higher than maximum allowed (%u)\n",
826 adapter->msix_vecs - ENA_ADMIN_MSIX_VEC);
827 error = EINVAL;
828 goto unlock;
829 }
830 if (tmp == adapter->num_io_queues) {
831 ena_log(adapter->pdev, ERR,
832 "Requested number of IO queues is equal to current value "
833 "(%u)\n",
834 adapter->num_io_queues);
835 } else {
836 ena_log(adapter->pdev, INFO,
837 "Requested new number of IO queues: %u, current value: "
838 "%u\n",
839 tmp, adapter->num_io_queues);
840
841 old_num_queues = adapter->num_io_queues;
842 error = ena_update_io_queue_nb(adapter, tmp);
843 if (error != 0)
844 return (error);
845
846 ena_sysctl_update_queue_node_nb(adapter, old_num_queues, tmp);
847 }
848
849 unlock:
850 ENA_LOCK_UNLOCK();
851
852 return (error);
853 }
854
855 static int
ena_sysctl_metrics_interval(SYSCTL_HANDLER_ARGS)856 ena_sysctl_metrics_interval(SYSCTL_HANDLER_ARGS)
857 {
858 struct ena_adapter *adapter = arg1;
859 uint16_t interval;
860 int error;
861
862 ENA_LOCK_LOCK();
863 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
864 error = EINVAL;
865 goto unlock;
866 }
867
868 error = sysctl_wire_old_buffer(req, sizeof(interval));
869 if (error == 0) {
870 interval = adapter->metrics_sample_interval;
871 error = sysctl_handle_16(oidp, &interval, 0, req);
872 }
873 if (error != 0 || req->newptr == NULL)
874 goto unlock;
875
876 if (interval > ENA_METRICS_MAX_SAMPLE_INTERVAL) {
877 ena_log(adapter->pdev, ERR,
878 "ENA metrics update interval is out of range - maximum allowed value: %d seconds\n",
879 ENA_METRICS_MAX_SAMPLE_INTERVAL);
880 error = EINVAL;
881 goto unlock;
882 }
883
884 if (interval == 0) {
885 ena_log(adapter->pdev, INFO,
886 "ENA metrics update is now turned off\n");
887 bzero(&adapter->eni_metrics, sizeof(adapter->eni_metrics));
888 } else {
889 ena_log(adapter->pdev, INFO,
890 "ENA metrics update interval is set to: %" PRIu16
891 " seconds\n",
892 interval);
893 }
894
895 adapter->metrics_sample_interval = interval;
896
897 unlock:
898 ENA_LOCK_UNLOCK();
899
900 return (0);
901 }
902
903 static int
ena_sysctl_irq_base_cpu(SYSCTL_HANDLER_ARGS)904 ena_sysctl_irq_base_cpu(SYSCTL_HANDLER_ARGS)
905 {
906 struct ena_adapter *adapter = arg1;
907 int irq_base_cpu = 0;
908 int error;
909
910 ENA_LOCK_LOCK();
911 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
912 error = ENODEV;
913 goto unlock;
914 }
915
916 error = sysctl_wire_old_buffer(req, sizeof(irq_base_cpu));
917 if (error == 0) {
918 irq_base_cpu = adapter->irq_cpu_base;
919 error = sysctl_handle_int(oidp, &irq_base_cpu, 0, req);
920 }
921 if (error != 0 || req->newptr == NULL)
922 goto unlock;
923
924 if (irq_base_cpu <= ENA_BASE_CPU_UNSPECIFIED) {
925 ena_log(adapter->pdev, ERR,
926 "Requested base CPU is less than zero.\n");
927 error = EINVAL;
928 goto unlock;
929 }
930
931 if (irq_base_cpu > mp_ncpus) {
932 ena_log(adapter->pdev, INFO,
933 "Requested base CPU is larger than the number of available CPUs. \n");
934 error = EINVAL;
935 goto unlock;
936
937 }
938
939 if (irq_base_cpu == adapter->irq_cpu_base) {
940 ena_log(adapter->pdev, INFO,
941 "Requested IRQ base CPU is equal to current value "
942 "(%d)\n",
943 adapter->irq_cpu_base);
944 goto unlock;
945 }
946
947 ena_log(adapter->pdev, INFO,
948 "Requested new IRQ base CPU: %d, current value: %d\n",
949 irq_base_cpu, adapter->irq_cpu_base);
950
951 error = ena_update_base_cpu(adapter, irq_base_cpu);
952
953 unlock:
954 ENA_LOCK_UNLOCK();
955
956 return (error);
957 }
958
959 static int
ena_sysctl_irq_cpu_stride(SYSCTL_HANDLER_ARGS)960 ena_sysctl_irq_cpu_stride(SYSCTL_HANDLER_ARGS)
961 {
962 struct ena_adapter *adapter = arg1;
963 int32_t irq_cpu_stride = 0;
964 int error;
965
966 ENA_LOCK_LOCK();
967 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
968 error = ENODEV;
969 goto unlock;
970 }
971
972 error = sysctl_wire_old_buffer(req, sizeof(irq_cpu_stride));
973 if (error == 0) {
974 irq_cpu_stride = adapter->irq_cpu_stride;
975 error = sysctl_handle_int(oidp, &irq_cpu_stride, 0, req);
976 }
977 if (error != 0 || req->newptr == NULL)
978 goto unlock;
979
980 if (irq_cpu_stride < 0) {
981 ena_log(adapter->pdev, ERR,
982 "Requested IRQ stride is less than zero.\n");
983 error = EINVAL;
984 goto unlock;
985 }
986
987 if (irq_cpu_stride > mp_ncpus) {
988 ena_log(adapter->pdev, INFO,
989 "Warning: Requested IRQ stride is larger than the number of available CPUs.\n");
990 }
991
992 if (irq_cpu_stride == adapter->irq_cpu_stride) {
993 ena_log(adapter->pdev, INFO,
994 "Requested IRQ CPU stride is equal to current value "
995 "(%u)\n",
996 adapter->irq_cpu_stride);
997 goto unlock;
998 }
999
1000 ena_log(adapter->pdev, INFO,
1001 "Requested new IRQ CPU stride: %u, current value: %u\n",
1002 irq_cpu_stride, adapter->irq_cpu_stride);
1003
1004 error = ena_update_cpu_stride(adapter, irq_cpu_stride);
1005 if (error != 0)
1006 goto unlock;
1007
1008 unlock:
1009 ENA_LOCK_UNLOCK();
1010
1011 return (error);
1012 }
1013
1014 #ifndef RSS
1015 /*
1016 * Change the Receive Side Scaling hash key.
1017 */
1018 static int
ena_sysctl_rss_key(SYSCTL_HANDLER_ARGS)1019 ena_sysctl_rss_key(SYSCTL_HANDLER_ARGS)
1020 {
1021 struct ena_adapter *adapter = arg1;
1022 struct ena_com_dev *ena_dev = adapter->ena_dev;
1023 enum ena_admin_hash_functions ena_func;
1024 char msg[ENA_HASH_KEY_MSG_SIZE];
1025 char elem[3] = { 0 };
1026 char *endp;
1027 u8 rss_key[ENA_HASH_KEY_SIZE];
1028 int error, i;
1029
1030 ENA_LOCK_LOCK();
1031 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
1032 error = EINVAL;
1033 goto unlock;
1034 }
1035
1036 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter))) {
1037 error = ENOTSUP;
1038 goto unlock;
1039 }
1040
1041 error = sysctl_wire_old_buffer(req, sizeof(msg));
1042 if (error != 0)
1043 goto unlock;
1044
1045 error = ena_com_get_hash_function(adapter->ena_dev, &ena_func);
1046 if (error != 0) {
1047 device_printf(adapter->pdev, "Cannot get hash function\n");
1048 goto unlock;
1049 }
1050
1051 if (ena_func != ENA_ADMIN_TOEPLITZ) {
1052 error = EINVAL;
1053 device_printf(adapter->pdev, "Unsupported hash algorithm\n");
1054 goto unlock;
1055 }
1056
1057 error = ena_rss_get_hash_key(ena_dev, rss_key);
1058 if (error != 0) {
1059 device_printf(adapter->pdev, "Cannot get hash key\n");
1060 goto unlock;
1061 }
1062
1063 for (i = 0; i < ENA_HASH_KEY_SIZE; ++i)
1064 snprintf(&msg[i * 2], 3, "%02x", rss_key[i]);
1065
1066 error = sysctl_handle_string(oidp, msg, sizeof(msg), req);
1067 if (error != 0 || req->newptr == NULL)
1068 goto unlock;
1069
1070 if (strlen(msg) != sizeof(msg) - 1) {
1071 error = EINVAL;
1072 device_printf(adapter->pdev, "Invalid key size\n");
1073 goto unlock;
1074 }
1075
1076 for (i = 0; i < ENA_HASH_KEY_SIZE; ++i) {
1077 strncpy(elem, &msg[i * 2], 2);
1078 rss_key[i] = strtol(elem, &endp, 16);
1079
1080 /* Both hex nibbles in the string must be valid to continue. */
1081 if (endp == elem || *endp != '\0' || rss_key[i] < 0) {
1082 error = EINVAL;
1083 device_printf(adapter->pdev,
1084 "Invalid key hex value: '%c'\n", *endp);
1085 goto unlock;
1086 }
1087 }
1088
1089 error = ena_rss_set_hash(ena_dev, rss_key);
1090 if (error != 0)
1091 device_printf(adapter->pdev, "Cannot fill hash key\n");
1092
1093 unlock:
1094 ENA_LOCK_UNLOCK();
1095
1096 return (error);
1097 }
1098
1099 /*
1100 * Change the Receive Side Scaling indirection table.
1101 *
1102 * The sysctl entry string consists of one or more `x:y` keypairs, where
1103 * x stands for the table index and y for its new value.
1104 * Table indices that don't need to be updated can be omitted from the string
1105 * and will retain their existing values. If an index is entered more than once,
1106 * the last value is used.
1107 *
1108 * Example:
1109 * To update two selected indices in the RSS indirection table, e.g. setting
1110 * index 0 to queue 5 and then index 5 to queue 0, the below command should be
1111 * used:
1112 * sysctl dev.ena.0.rss.indir_table="0:5 5:0"
1113 */
1114 static int
ena_sysctl_rss_indir_table(SYSCTL_HANDLER_ARGS)1115 ena_sysctl_rss_indir_table(SYSCTL_HANDLER_ARGS)
1116 {
1117 int num_queues, error;
1118 struct ena_adapter *adapter = arg1;
1119 struct ena_indir *indir;
1120 char *msg, *buf, *endp;
1121 uint32_t idx, value;
1122
1123 ENA_LOCK_LOCK();
1124 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))) {
1125 error = EINVAL;
1126 goto unlock;
1127 }
1128
1129 if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter))) {
1130 error = ENOTSUP;
1131 goto unlock;
1132 }
1133
1134 indir = adapter->rss_indir;
1135 msg = indir->sysctl_buf;
1136
1137 if (unlikely(indir == NULL)) {
1138 error = ENOTSUP;
1139 goto unlock;
1140 }
1141
1142 error = sysctl_handle_string(oidp, msg, sizeof(indir->sysctl_buf), req);
1143 if (error != 0 || req->newptr == NULL)
1144 goto unlock;
1145
1146 num_queues = adapter->num_io_queues;
1147
1148 /*
1149 * This sysctl expects msg to be a list of `x:y` record pairs,
1150 * where x is the indirection table index and y is its value.
1151 */
1152 for (buf = msg; *buf != '\0'; buf = endp) {
1153 idx = strtol(buf, &endp, 10);
1154
1155 if (endp == buf || idx < 0) {
1156 device_printf(adapter->pdev, "Invalid index: %s\n",
1157 buf);
1158 error = EINVAL;
1159 break;
1160 }
1161
1162 if (idx >= ENA_RX_RSS_TABLE_SIZE) {
1163 device_printf(adapter->pdev, "Index %d out of range\n",
1164 idx);
1165 error = ERANGE;
1166 break;
1167 }
1168
1169 buf = endp;
1170
1171 if (*buf++ != ':') {
1172 device_printf(adapter->pdev, "Missing ':' separator\n");
1173 error = EINVAL;
1174 break;
1175 }
1176
1177 value = strtol(buf, &endp, 10);
1178
1179 if (endp == buf || value < 0) {
1180 device_printf(adapter->pdev, "Invalid value: %s\n",
1181 buf);
1182 error = EINVAL;
1183 break;
1184 }
1185
1186 if (value >= num_queues) {
1187 device_printf(adapter->pdev, "Value %d out of range\n",
1188 value);
1189 error = ERANGE;
1190 break;
1191 }
1192
1193 indir->table[idx] = value;
1194 }
1195
1196 if (error != 0) /* Reload indirection table with last good data. */
1197 ena_rss_indir_get(adapter, indir->table);
1198
1199 /* At this point msg has been clobbered by sysctl_handle_string. */
1200 ena_rss_copy_indir_buf(msg, indir->table);
1201
1202 if (error == 0)
1203 error = ena_rss_indir_set(adapter, indir->table);
1204
1205 unlock:
1206 ENA_LOCK_UNLOCK();
1207
1208 return (error);
1209 }
1210 #endif /* RSS */
1211