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f53aaa31 FD |
1 | /* |
2 | * Copyright (c) 2018, Mellanox Technologies. All rights reserved. | |
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 | * OpenIB.org 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 | */ | |
70dd6fdb | 32 | #define CREATE_TRACE_POINTS |
720a936d | 33 | #include "lib/eq.h" |
f53aaa31 | 34 | #include "fw_tracer.h" |
70dd6fdb | 35 | #include "fw_tracer_tracepoint.h" |
f53aaa31 FD |
36 | |
37 | static int mlx5_query_mtrc_caps(struct mlx5_fw_tracer *tracer) | |
38 | { | |
39 | u32 *string_db_base_address_out = tracer->str_db.base_address_out; | |
40 | u32 *string_db_size_out = tracer->str_db.size_out; | |
41 | struct mlx5_core_dev *dev = tracer->dev; | |
42 | u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
43 | u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
44 | void *mtrc_cap_sp; | |
45 | int err, i; | |
46 | ||
47 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), | |
48 | MLX5_REG_MTRC_CAP, 0, 0); | |
49 | if (err) { | |
50 | mlx5_core_warn(dev, "FWTracer: Error reading tracer caps %d\n", | |
51 | err); | |
52 | return err; | |
53 | } | |
54 | ||
55 | if (!MLX5_GET(mtrc_cap, out, trace_to_memory)) { | |
56 | mlx5_core_dbg(dev, "FWTracer: Device does not support logging traces to memory\n"); | |
57 | return -ENOTSUPP; | |
58 | } | |
59 | ||
60 | tracer->trc_ver = MLX5_GET(mtrc_cap, out, trc_ver); | |
61 | tracer->str_db.first_string_trace = | |
62 | MLX5_GET(mtrc_cap, out, first_string_trace); | |
63 | tracer->str_db.num_string_trace = | |
64 | MLX5_GET(mtrc_cap, out, num_string_trace); | |
65 | tracer->str_db.num_string_db = MLX5_GET(mtrc_cap, out, num_string_db); | |
66 | tracer->owner = !!MLX5_GET(mtrc_cap, out, trace_owner); | |
db561fed | 67 | tracer->str_db.loaded = false; |
f53aaa31 FD |
68 | |
69 | for (i = 0; i < tracer->str_db.num_string_db; i++) { | |
70 | mtrc_cap_sp = MLX5_ADDR_OF(mtrc_cap, out, string_db_param[i]); | |
71 | string_db_base_address_out[i] = MLX5_GET(mtrc_string_db_param, | |
72 | mtrc_cap_sp, | |
73 | string_db_base_address); | |
74 | string_db_size_out[i] = MLX5_GET(mtrc_string_db_param, | |
75 | mtrc_cap_sp, string_db_size); | |
76 | } | |
77 | ||
78 | return err; | |
79 | } | |
80 | ||
81 | static int mlx5_set_mtrc_caps_trace_owner(struct mlx5_fw_tracer *tracer, | |
82 | u32 *out, u32 out_size, | |
83 | u8 trace_owner) | |
84 | { | |
85 | struct mlx5_core_dev *dev = tracer->dev; | |
86 | u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
87 | ||
88 | MLX5_SET(mtrc_cap, in, trace_owner, trace_owner); | |
89 | ||
90 | return mlx5_core_access_reg(dev, in, sizeof(in), out, out_size, | |
91 | MLX5_REG_MTRC_CAP, 0, 1); | |
92 | } | |
93 | ||
94 | static int mlx5_fw_tracer_ownership_acquire(struct mlx5_fw_tracer *tracer) | |
95 | { | |
96 | struct mlx5_core_dev *dev = tracer->dev; | |
97 | u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
98 | int err; | |
99 | ||
100 | err = mlx5_set_mtrc_caps_trace_owner(tracer, out, sizeof(out), | |
101 | MLX5_FW_TRACER_ACQUIRE_OWNERSHIP); | |
102 | if (err) { | |
103 | mlx5_core_warn(dev, "FWTracer: Acquire tracer ownership failed %d\n", | |
104 | err); | |
105 | return err; | |
106 | } | |
107 | ||
108 | tracer->owner = !!MLX5_GET(mtrc_cap, out, trace_owner); | |
109 | ||
110 | if (!tracer->owner) | |
111 | return -EBUSY; | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | static void mlx5_fw_tracer_ownership_release(struct mlx5_fw_tracer *tracer) | |
117 | { | |
118 | u32 out[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
119 | ||
120 | mlx5_set_mtrc_caps_trace_owner(tracer, out, sizeof(out), | |
121 | MLX5_FW_TRACER_RELEASE_OWNERSHIP); | |
122 | tracer->owner = false; | |
123 | } | |
124 | ||
48967ffd FD |
125 | static int mlx5_fw_tracer_create_log_buf(struct mlx5_fw_tracer *tracer) |
126 | { | |
127 | struct mlx5_core_dev *dev = tracer->dev; | |
7be3412a | 128 | struct device *ddev; |
48967ffd FD |
129 | dma_addr_t dma; |
130 | void *buff; | |
131 | gfp_t gfp; | |
132 | int err; | |
133 | ||
134 | tracer->buff.size = TRACE_BUFFER_SIZE_BYTE; | |
135 | ||
136 | gfp = GFP_KERNEL | __GFP_ZERO; | |
137 | buff = (void *)__get_free_pages(gfp, | |
138 | get_order(tracer->buff.size)); | |
139 | if (!buff) { | |
140 | err = -ENOMEM; | |
141 | mlx5_core_warn(dev, "FWTracer: Failed to allocate pages, %d\n", err); | |
142 | return err; | |
143 | } | |
144 | tracer->buff.log_buf = buff; | |
145 | ||
7be3412a | 146 | ddev = mlx5_core_dma_dev(dev); |
48967ffd FD |
147 | dma = dma_map_single(ddev, buff, tracer->buff.size, DMA_FROM_DEVICE); |
148 | if (dma_mapping_error(ddev, dma)) { | |
149 | mlx5_core_warn(dev, "FWTracer: Unable to map DMA: %d\n", | |
150 | dma_mapping_error(ddev, dma)); | |
151 | err = -ENOMEM; | |
152 | goto free_pages; | |
153 | } | |
154 | tracer->buff.dma = dma; | |
155 | ||
156 | return 0; | |
157 | ||
158 | free_pages: | |
159 | free_pages((unsigned long)tracer->buff.log_buf, get_order(tracer->buff.size)); | |
160 | ||
161 | return err; | |
162 | } | |
163 | ||
164 | static void mlx5_fw_tracer_destroy_log_buf(struct mlx5_fw_tracer *tracer) | |
165 | { | |
166 | struct mlx5_core_dev *dev = tracer->dev; | |
7be3412a | 167 | struct device *ddev; |
48967ffd FD |
168 | |
169 | if (!tracer->buff.log_buf) | |
170 | return; | |
171 | ||
7be3412a | 172 | ddev = mlx5_core_dma_dev(dev); |
48967ffd FD |
173 | dma_unmap_single(ddev, tracer->buff.dma, tracer->buff.size, DMA_FROM_DEVICE); |
174 | free_pages((unsigned long)tracer->buff.log_buf, get_order(tracer->buff.size)); | |
175 | } | |
176 | ||
e9cad2ce SM |
177 | static int mlx5_fw_tracer_create_mkey(struct mlx5_fw_tracer *tracer) |
178 | { | |
179 | struct mlx5_core_dev *dev = tracer->dev; | |
180 | int err, inlen, i; | |
181 | __be64 *mtt; | |
182 | void *mkc; | |
183 | u32 *in; | |
184 | ||
185 | inlen = MLX5_ST_SZ_BYTES(create_mkey_in) + | |
186 | sizeof(*mtt) * round_up(TRACER_BUFFER_PAGE_NUM, 2); | |
187 | ||
188 | in = kvzalloc(inlen, GFP_KERNEL); | |
189 | if (!in) | |
190 | return -ENOMEM; | |
191 | ||
192 | MLX5_SET(create_mkey_in, in, translations_octword_actual_size, | |
193 | DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2)); | |
5edc4c72 | 194 | mtt = (__be64 *)MLX5_ADDR_OF(create_mkey_in, in, klm_pas_mtt); |
e9cad2ce SM |
195 | for (i = 0 ; i < TRACER_BUFFER_PAGE_NUM ; i++) |
196 | mtt[i] = cpu_to_be64(tracer->buff.dma + i * PAGE_SIZE); | |
197 | ||
198 | mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry); | |
199 | MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MTT); | |
200 | MLX5_SET(mkc, mkc, lr, 1); | |
201 | MLX5_SET(mkc, mkc, lw, 1); | |
202 | MLX5_SET(mkc, mkc, pd, tracer->buff.pdn); | |
203 | MLX5_SET(mkc, mkc, bsf_octword_size, 0); | |
204 | MLX5_SET(mkc, mkc, qpn, 0xffffff); | |
205 | MLX5_SET(mkc, mkc, log_page_size, PAGE_SHIFT); | |
206 | MLX5_SET(mkc, mkc, translations_octword_size, | |
207 | DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2)); | |
208 | MLX5_SET64(mkc, mkc, start_addr, tracer->buff.dma); | |
209 | MLX5_SET64(mkc, mkc, len, tracer->buff.size); | |
210 | err = mlx5_core_create_mkey(dev, &tracer->buff.mkey, in, inlen); | |
211 | if (err) | |
212 | mlx5_core_warn(dev, "FWTracer: Failed to create mkey, %d\n", err); | |
213 | ||
214 | kvfree(in); | |
215 | ||
216 | return err; | |
217 | } | |
218 | ||
48967ffd FD |
219 | static void mlx5_fw_tracer_free_strings_db(struct mlx5_fw_tracer *tracer) |
220 | { | |
221 | u32 num_string_db = tracer->str_db.num_string_db; | |
222 | int i; | |
223 | ||
224 | for (i = 0; i < num_string_db; i++) { | |
225 | kfree(tracer->str_db.buffer[i]); | |
226 | tracer->str_db.buffer[i] = NULL; | |
227 | } | |
228 | } | |
229 | ||
230 | static int mlx5_fw_tracer_allocate_strings_db(struct mlx5_fw_tracer *tracer) | |
231 | { | |
232 | u32 *string_db_size_out = tracer->str_db.size_out; | |
233 | u32 num_string_db = tracer->str_db.num_string_db; | |
234 | int i; | |
235 | ||
236 | for (i = 0; i < num_string_db; i++) { | |
b0118ced SD |
237 | if (!string_db_size_out[i]) |
238 | continue; | |
48967ffd FD |
239 | tracer->str_db.buffer[i] = kzalloc(string_db_size_out[i], GFP_KERNEL); |
240 | if (!tracer->str_db.buffer[i]) | |
241 | goto free_strings_db; | |
242 | } | |
243 | ||
244 | return 0; | |
245 | ||
246 | free_strings_db: | |
247 | mlx5_fw_tracer_free_strings_db(tracer); | |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
fd1483fe MS |
251 | static void |
252 | mlx5_fw_tracer_init_saved_traces_array(struct mlx5_fw_tracer *tracer) | |
253 | { | |
254 | tracer->st_arr.saved_traces_index = 0; | |
255 | mutex_init(&tracer->st_arr.lock); | |
256 | } | |
257 | ||
258 | static void | |
259 | mlx5_fw_tracer_clean_saved_traces_array(struct mlx5_fw_tracer *tracer) | |
260 | { | |
261 | mutex_destroy(&tracer->st_arr.lock); | |
262 | } | |
263 | ||
48967ffd FD |
264 | static void mlx5_tracer_read_strings_db(struct work_struct *work) |
265 | { | |
266 | struct mlx5_fw_tracer *tracer = container_of(work, struct mlx5_fw_tracer, | |
267 | read_fw_strings_work); | |
268 | u32 num_of_reads, num_string_db = tracer->str_db.num_string_db; | |
269 | struct mlx5_core_dev *dev = tracer->dev; | |
270 | u32 in[MLX5_ST_SZ_DW(mtrc_cap)] = {0}; | |
271 | u32 leftovers, offset; | |
272 | int err = 0, i, j; | |
273 | u32 *out, outlen; | |
274 | void *out_value; | |
275 | ||
276 | outlen = MLX5_ST_SZ_BYTES(mtrc_stdb) + STRINGS_DB_READ_SIZE_BYTES; | |
277 | out = kzalloc(outlen, GFP_KERNEL); | |
278 | if (!out) { | |
279 | err = -ENOMEM; | |
280 | goto out; | |
281 | } | |
282 | ||
283 | for (i = 0; i < num_string_db; i++) { | |
b0118ced SD |
284 | if (!tracer->str_db.size_out[i]) |
285 | continue; | |
48967ffd FD |
286 | offset = 0; |
287 | MLX5_SET(mtrc_stdb, in, string_db_index, i); | |
288 | num_of_reads = tracer->str_db.size_out[i] / | |
289 | STRINGS_DB_READ_SIZE_BYTES; | |
290 | leftovers = (tracer->str_db.size_out[i] % | |
291 | STRINGS_DB_READ_SIZE_BYTES) / | |
292 | STRINGS_DB_LEFTOVER_SIZE_BYTES; | |
293 | ||
294 | MLX5_SET(mtrc_stdb, in, read_size, STRINGS_DB_READ_SIZE_BYTES); | |
295 | for (j = 0; j < num_of_reads; j++) { | |
296 | MLX5_SET(mtrc_stdb, in, start_offset, offset); | |
297 | ||
298 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, | |
299 | outlen, MLX5_REG_MTRC_STDB, | |
300 | 0, 1); | |
301 | if (err) { | |
302 | mlx5_core_dbg(dev, "FWTracer: Failed to read strings DB %d\n", | |
303 | err); | |
304 | goto out_free; | |
305 | } | |
306 | ||
307 | out_value = MLX5_ADDR_OF(mtrc_stdb, out, string_db_data); | |
308 | memcpy(tracer->str_db.buffer[i] + offset, out_value, | |
309 | STRINGS_DB_READ_SIZE_BYTES); | |
310 | offset += STRINGS_DB_READ_SIZE_BYTES; | |
311 | } | |
312 | ||
313 | /* Strings database is aligned to 64, need to read leftovers*/ | |
314 | MLX5_SET(mtrc_stdb, in, read_size, | |
315 | STRINGS_DB_LEFTOVER_SIZE_BYTES); | |
316 | for (j = 0; j < leftovers; j++) { | |
317 | MLX5_SET(mtrc_stdb, in, start_offset, offset); | |
318 | ||
319 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, | |
320 | outlen, MLX5_REG_MTRC_STDB, | |
321 | 0, 1); | |
322 | if (err) { | |
323 | mlx5_core_dbg(dev, "FWTracer: Failed to read strings DB %d\n", | |
324 | err); | |
325 | goto out_free; | |
326 | } | |
327 | ||
328 | out_value = MLX5_ADDR_OF(mtrc_stdb, out, string_db_data); | |
329 | memcpy(tracer->str_db.buffer[i] + offset, out_value, | |
330 | STRINGS_DB_LEFTOVER_SIZE_BYTES); | |
331 | offset += STRINGS_DB_LEFTOVER_SIZE_BYTES; | |
332 | } | |
333 | } | |
334 | ||
335 | tracer->str_db.loaded = true; | |
336 | ||
337 | out_free: | |
338 | kfree(out); | |
339 | out: | |
340 | return; | |
341 | } | |
342 | ||
c71ad41c | 343 | static void mlx5_fw_tracer_arm(struct mlx5_core_dev *dev) |
f53aaa31 | 344 | { |
c71ad41c FD |
345 | u32 out[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0}; |
346 | u32 in[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0}; | |
f53aaa31 FD |
347 | int err; |
348 | ||
c71ad41c FD |
349 | MLX5_SET(mtrc_ctrl, in, arm_event, 1); |
350 | ||
351 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), | |
352 | MLX5_REG_MTRC_CTRL, 0, 1); | |
353 | if (err) | |
354 | mlx5_core_warn(dev, "FWTracer: Failed to arm tracer event %d\n", err); | |
355 | } | |
356 | ||
70dd6fdb FD |
357 | static const char *VAL_PARM = "%llx"; |
358 | static const char *REPLACE_64_VAL_PARM = "%x%x"; | |
359 | static const char *PARAM_CHAR = "%"; | |
360 | ||
361 | static int mlx5_tracer_message_hash(u32 message_id) | |
362 | { | |
363 | return jhash_1word(message_id, 0) & (MESSAGE_HASH_SIZE - 1); | |
364 | } | |
365 | ||
366 | static struct tracer_string_format *mlx5_tracer_message_insert(struct mlx5_fw_tracer *tracer, | |
367 | struct tracer_event *tracer_event) | |
368 | { | |
369 | struct hlist_head *head = | |
370 | &tracer->hash[mlx5_tracer_message_hash(tracer_event->string_event.tmsn)]; | |
371 | struct tracer_string_format *cur_string; | |
372 | ||
373 | cur_string = kzalloc(sizeof(*cur_string), GFP_KERNEL); | |
374 | if (!cur_string) | |
375 | return NULL; | |
376 | ||
377 | hlist_add_head(&cur_string->hlist, head); | |
378 | ||
379 | return cur_string; | |
380 | } | |
381 | ||
382 | static struct tracer_string_format *mlx5_tracer_get_string(struct mlx5_fw_tracer *tracer, | |
383 | struct tracer_event *tracer_event) | |
384 | { | |
385 | struct tracer_string_format *cur_string; | |
386 | u32 str_ptr, offset; | |
387 | int i; | |
388 | ||
389 | str_ptr = tracer_event->string_event.string_param; | |
390 | ||
391 | for (i = 0; i < tracer->str_db.num_string_db; i++) { | |
b0118ced SD |
392 | if (!tracer->str_db.size_out[i]) |
393 | continue; | |
70dd6fdb FD |
394 | if (str_ptr > tracer->str_db.base_address_out[i] && |
395 | str_ptr < tracer->str_db.base_address_out[i] + | |
396 | tracer->str_db.size_out[i]) { | |
397 | offset = str_ptr - tracer->str_db.base_address_out[i]; | |
398 | /* add it to the hash */ | |
399 | cur_string = mlx5_tracer_message_insert(tracer, tracer_event); | |
400 | if (!cur_string) | |
401 | return NULL; | |
402 | cur_string->string = (char *)(tracer->str_db.buffer[i] + | |
403 | offset); | |
404 | return cur_string; | |
405 | } | |
406 | } | |
407 | ||
408 | return NULL; | |
409 | } | |
410 | ||
411 | static void mlx5_tracer_clean_message(struct tracer_string_format *str_frmt) | |
412 | { | |
413 | hlist_del(&str_frmt->hlist); | |
414 | kfree(str_frmt); | |
415 | } | |
416 | ||
417 | static int mlx5_tracer_get_num_of_params(char *str) | |
418 | { | |
419 | char *substr, *pstr = str; | |
420 | int num_of_params = 0; | |
421 | ||
422 | /* replace %llx with %x%x */ | |
423 | substr = strstr(pstr, VAL_PARM); | |
424 | while (substr) { | |
425 | memcpy(substr, REPLACE_64_VAL_PARM, 4); | |
426 | pstr = substr; | |
427 | substr = strstr(pstr, VAL_PARM); | |
428 | } | |
429 | ||
430 | /* count all the % characters */ | |
431 | substr = strstr(str, PARAM_CHAR); | |
432 | while (substr) { | |
433 | num_of_params += 1; | |
434 | str = substr + 1; | |
435 | substr = strstr(str, PARAM_CHAR); | |
436 | } | |
437 | ||
438 | return num_of_params; | |
439 | } | |
440 | ||
441 | static struct tracer_string_format *mlx5_tracer_message_find(struct hlist_head *head, | |
442 | u8 event_id, u32 tmsn) | |
443 | { | |
444 | struct tracer_string_format *message; | |
445 | ||
446 | hlist_for_each_entry(message, head, hlist) | |
447 | if (message->event_id == event_id && message->tmsn == tmsn) | |
448 | return message; | |
449 | ||
450 | return NULL; | |
451 | } | |
452 | ||
453 | static struct tracer_string_format *mlx5_tracer_message_get(struct mlx5_fw_tracer *tracer, | |
454 | struct tracer_event *tracer_event) | |
455 | { | |
456 | struct hlist_head *head = | |
457 | &tracer->hash[mlx5_tracer_message_hash(tracer_event->string_event.tmsn)]; | |
458 | ||
459 | return mlx5_tracer_message_find(head, tracer_event->event_id, tracer_event->string_event.tmsn); | |
460 | } | |
461 | ||
c71ad41c FD |
462 | static void poll_trace(struct mlx5_fw_tracer *tracer, |
463 | struct tracer_event *tracer_event, u64 *trace) | |
464 | { | |
465 | u32 timestamp_low, timestamp_mid, timestamp_high, urts; | |
466 | ||
467 | tracer_event->event_id = MLX5_GET(tracer_event, trace, event_id); | |
468 | tracer_event->lost_event = MLX5_GET(tracer_event, trace, lost); | |
f7133135 | 469 | tracer_event->out = trace; |
c71ad41c FD |
470 | |
471 | switch (tracer_event->event_id) { | |
472 | case TRACER_EVENT_TYPE_TIMESTAMP: | |
473 | tracer_event->type = TRACER_EVENT_TYPE_TIMESTAMP; | |
474 | urts = MLX5_GET(tracer_timestamp_event, trace, urts); | |
475 | if (tracer->trc_ver == 0) | |
476 | tracer_event->timestamp_event.unreliable = !!(urts >> 2); | |
477 | else | |
478 | tracer_event->timestamp_event.unreliable = !!(urts & 1); | |
479 | ||
480 | timestamp_low = MLX5_GET(tracer_timestamp_event, | |
481 | trace, timestamp7_0); | |
482 | timestamp_mid = MLX5_GET(tracer_timestamp_event, | |
483 | trace, timestamp39_8); | |
484 | timestamp_high = MLX5_GET(tracer_timestamp_event, | |
485 | trace, timestamp52_40); | |
486 | ||
487 | tracer_event->timestamp_event.timestamp = | |
488 | ((u64)timestamp_high << 40) | | |
489 | ((u64)timestamp_mid << 8) | | |
490 | (u64)timestamp_low; | |
491 | break; | |
492 | default: | |
341a80de | 493 | if (tracer_event->event_id >= tracer->str_db.first_string_trace && |
c71ad41c FD |
494 | tracer_event->event_id <= tracer->str_db.first_string_trace + |
495 | tracer->str_db.num_string_trace) { | |
496 | tracer_event->type = TRACER_EVENT_TYPE_STRING; | |
497 | tracer_event->string_event.timestamp = | |
498 | MLX5_GET(tracer_string_event, trace, timestamp); | |
499 | tracer_event->string_event.string_param = | |
500 | MLX5_GET(tracer_string_event, trace, string_param); | |
501 | tracer_event->string_event.tmsn = | |
502 | MLX5_GET(tracer_string_event, trace, tmsn); | |
503 | tracer_event->string_event.tdsn = | |
504 | MLX5_GET(tracer_string_event, trace, tdsn); | |
505 | } else { | |
506 | tracer_event->type = TRACER_EVENT_TYPE_UNRECOGNIZED; | |
507 | } | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | static u64 get_block_timestamp(struct mlx5_fw_tracer *tracer, u64 *ts_event) | |
513 | { | |
514 | struct tracer_event tracer_event; | |
515 | u8 event_id; | |
516 | ||
517 | event_id = MLX5_GET(tracer_event, ts_event, event_id); | |
518 | ||
519 | if (event_id == TRACER_EVENT_TYPE_TIMESTAMP) | |
520 | poll_trace(tracer, &tracer_event, ts_event); | |
521 | else | |
522 | tracer_event.timestamp_event.timestamp = 0; | |
523 | ||
524 | return tracer_event.timestamp_event.timestamp; | |
525 | } | |
526 | ||
70dd6fdb FD |
527 | static void mlx5_fw_tracer_clean_print_hash(struct mlx5_fw_tracer *tracer) |
528 | { | |
529 | struct tracer_string_format *str_frmt; | |
530 | struct hlist_node *n; | |
531 | int i; | |
532 | ||
533 | for (i = 0; i < MESSAGE_HASH_SIZE; i++) { | |
534 | hlist_for_each_entry_safe(str_frmt, n, &tracer->hash[i], hlist) | |
535 | mlx5_tracer_clean_message(str_frmt); | |
536 | } | |
537 | } | |
538 | ||
539 | static void mlx5_fw_tracer_clean_ready_list(struct mlx5_fw_tracer *tracer) | |
540 | { | |
541 | struct tracer_string_format *str_frmt, *tmp_str; | |
542 | ||
543 | list_for_each_entry_safe(str_frmt, tmp_str, &tracer->ready_strings_list, | |
544 | list) | |
545 | list_del(&str_frmt->list); | |
546 | } | |
547 | ||
fd1483fe MS |
548 | static void mlx5_fw_tracer_save_trace(struct mlx5_fw_tracer *tracer, |
549 | u64 timestamp, bool lost, | |
550 | u8 event_id, char *msg) | |
551 | { | |
552 | struct mlx5_fw_trace_data *trace_data; | |
553 | ||
554 | mutex_lock(&tracer->st_arr.lock); | |
555 | trace_data = &tracer->st_arr.straces[tracer->st_arr.saved_traces_index]; | |
556 | trace_data->timestamp = timestamp; | |
557 | trace_data->lost = lost; | |
558 | trace_data->event_id = event_id; | |
bb487d29 | 559 | strscpy_pad(trace_data->msg, msg, TRACE_STR_MSG); |
fd1483fe MS |
560 | |
561 | tracer->st_arr.saved_traces_index = | |
562 | (tracer->st_arr.saved_traces_index + 1) & (SAVED_TRACES_NUM - 1); | |
563 | mutex_unlock(&tracer->st_arr.lock); | |
564 | } | |
565 | ||
fa355bb1 SM |
566 | static noinline |
567 | void mlx5_tracer_print_trace(struct tracer_string_format *str_frmt, | |
568 | struct mlx5_core_dev *dev, | |
569 | u64 trace_timestamp) | |
70dd6fdb FD |
570 | { |
571 | char tmp[512]; | |
572 | ||
573 | snprintf(tmp, sizeof(tmp), str_frmt->string, | |
574 | str_frmt->params[0], | |
575 | str_frmt->params[1], | |
576 | str_frmt->params[2], | |
577 | str_frmt->params[3], | |
578 | str_frmt->params[4], | |
579 | str_frmt->params[5], | |
580 | str_frmt->params[6]); | |
581 | ||
582 | trace_mlx5_fw(dev->tracer, trace_timestamp, str_frmt->lost, | |
583 | str_frmt->event_id, tmp); | |
584 | ||
fd1483fe MS |
585 | mlx5_fw_tracer_save_trace(dev->tracer, trace_timestamp, |
586 | str_frmt->lost, str_frmt->event_id, tmp); | |
587 | ||
70dd6fdb FD |
588 | /* remove it from hash */ |
589 | mlx5_tracer_clean_message(str_frmt); | |
590 | } | |
591 | ||
f7133135 SD |
592 | static int mlx5_tracer_handle_raw_string(struct mlx5_fw_tracer *tracer, |
593 | struct tracer_event *tracer_event) | |
594 | { | |
595 | struct tracer_string_format *cur_string; | |
596 | ||
597 | cur_string = mlx5_tracer_message_insert(tracer, tracer_event); | |
598 | if (!cur_string) | |
599 | return -1; | |
600 | ||
601 | cur_string->event_id = tracer_event->event_id; | |
602 | cur_string->timestamp = tracer_event->string_event.timestamp; | |
603 | cur_string->lost = tracer_event->lost_event; | |
604 | cur_string->string = "0x%08x%08x"; | |
605 | cur_string->num_of_params = 2; | |
606 | cur_string->params[0] = upper_32_bits(*tracer_event->out); | |
607 | cur_string->params[1] = lower_32_bits(*tracer_event->out); | |
608 | list_add_tail(&cur_string->list, &tracer->ready_strings_list); | |
609 | return 0; | |
610 | } | |
611 | ||
70dd6fdb FD |
612 | static int mlx5_tracer_handle_string_trace(struct mlx5_fw_tracer *tracer, |
613 | struct tracer_event *tracer_event) | |
614 | { | |
615 | struct tracer_string_format *cur_string; | |
616 | ||
617 | if (tracer_event->string_event.tdsn == 0) { | |
618 | cur_string = mlx5_tracer_get_string(tracer, tracer_event); | |
619 | if (!cur_string) | |
f7133135 | 620 | return mlx5_tracer_handle_raw_string(tracer, tracer_event); |
70dd6fdb FD |
621 | |
622 | cur_string->num_of_params = mlx5_tracer_get_num_of_params(cur_string->string); | |
623 | cur_string->last_param_num = 0; | |
624 | cur_string->event_id = tracer_event->event_id; | |
625 | cur_string->tmsn = tracer_event->string_event.tmsn; | |
626 | cur_string->timestamp = tracer_event->string_event.timestamp; | |
627 | cur_string->lost = tracer_event->lost_event; | |
628 | if (cur_string->num_of_params == 0) /* trace with no params */ | |
629 | list_add_tail(&cur_string->list, &tracer->ready_strings_list); | |
630 | } else { | |
631 | cur_string = mlx5_tracer_message_get(tracer, tracer_event); | |
632 | if (!cur_string) { | |
988c2352 | 633 | pr_debug("%s Got string event for unknown string tmsn: %d\n", |
70dd6fdb | 634 | __func__, tracer_event->string_event.tmsn); |
f7133135 | 635 | return mlx5_tracer_handle_raw_string(tracer, tracer_event); |
70dd6fdb FD |
636 | } |
637 | cur_string->last_param_num += 1; | |
638 | if (cur_string->last_param_num > TRACER_MAX_PARAMS) { | |
639 | pr_debug("%s Number of params exceeds the max (%d)\n", | |
640 | __func__, TRACER_MAX_PARAMS); | |
641 | list_add_tail(&cur_string->list, &tracer->ready_strings_list); | |
642 | return 0; | |
643 | } | |
644 | /* keep the new parameter */ | |
645 | cur_string->params[cur_string->last_param_num - 1] = | |
646 | tracer_event->string_event.string_param; | |
647 | if (cur_string->last_param_num == cur_string->num_of_params) | |
648 | list_add_tail(&cur_string->list, &tracer->ready_strings_list); | |
649 | } | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static void mlx5_tracer_handle_timestamp_trace(struct mlx5_fw_tracer *tracer, | |
655 | struct tracer_event *tracer_event) | |
656 | { | |
657 | struct tracer_timestamp_event timestamp_event = | |
658 | tracer_event->timestamp_event; | |
659 | struct tracer_string_format *str_frmt, *tmp_str; | |
660 | struct mlx5_core_dev *dev = tracer->dev; | |
661 | u64 trace_timestamp; | |
662 | ||
663 | list_for_each_entry_safe(str_frmt, tmp_str, &tracer->ready_strings_list, list) { | |
664 | list_del(&str_frmt->list); | |
665 | if (str_frmt->timestamp < (timestamp_event.timestamp & MASK_6_0)) | |
666 | trace_timestamp = (timestamp_event.timestamp & MASK_52_7) | | |
667 | (str_frmt->timestamp & MASK_6_0); | |
668 | else | |
61db3d7b | 669 | trace_timestamp = ((timestamp_event.timestamp - 1) & MASK_52_7) | |
70dd6fdb FD |
670 | (str_frmt->timestamp & MASK_6_0); |
671 | ||
672 | mlx5_tracer_print_trace(str_frmt, dev, trace_timestamp); | |
673 | } | |
674 | } | |
675 | ||
676 | static int mlx5_tracer_handle_trace(struct mlx5_fw_tracer *tracer, | |
677 | struct tracer_event *tracer_event) | |
678 | { | |
679 | if (tracer_event->type == TRACER_EVENT_TYPE_STRING) { | |
680 | mlx5_tracer_handle_string_trace(tracer, tracer_event); | |
681 | } else if (tracer_event->type == TRACER_EVENT_TYPE_TIMESTAMP) { | |
682 | if (!tracer_event->timestamp_event.unreliable) | |
683 | mlx5_tracer_handle_timestamp_trace(tracer, tracer_event); | |
684 | } else { | |
685 | pr_debug("%s Got unrecognised type %d for parsing, exiting..\n", | |
686 | __func__, tracer_event->type); | |
687 | } | |
688 | return 0; | |
689 | } | |
690 | ||
c71ad41c FD |
691 | static void mlx5_fw_tracer_handle_traces(struct work_struct *work) |
692 | { | |
693 | struct mlx5_fw_tracer *tracer = | |
694 | container_of(work, struct mlx5_fw_tracer, handle_traces_work); | |
695 | u64 block_timestamp, last_block_timestamp, tmp_trace_block[TRACES_PER_BLOCK]; | |
696 | u32 block_count, start_offset, prev_start_offset, prev_consumer_index; | |
697 | u32 trace_event_size = MLX5_ST_SZ_BYTES(tracer_event); | |
3101d1fc | 698 | struct mlx5_core_dev *dev = tracer->dev; |
c71ad41c | 699 | struct tracer_event tracer_event; |
c71ad41c FD |
700 | int i; |
701 | ||
3101d1fc | 702 | mlx5_core_dbg(dev, "FWTracer: Handle Trace event, owner=(%d)\n", tracer->owner); |
c71ad41c | 703 | if (!tracer->owner) |
f53aaa31 | 704 | return; |
c71ad41c | 705 | |
8bf94e64 FD |
706 | if (unlikely(!tracer->str_db.loaded)) |
707 | goto arm; | |
708 | ||
c71ad41c FD |
709 | block_count = tracer->buff.size / TRACER_BLOCK_SIZE_BYTE; |
710 | start_offset = tracer->buff.consumer_index * TRACER_BLOCK_SIZE_BYTE; | |
711 | ||
39797f1c | 712 | /* Copy the block to local buffer to avoid HW override while being processed */ |
c71ad41c FD |
713 | memcpy(tmp_trace_block, tracer->buff.log_buf + start_offset, |
714 | TRACER_BLOCK_SIZE_BYTE); | |
715 | ||
716 | block_timestamp = | |
717 | get_block_timestamp(tracer, &tmp_trace_block[TRACES_PER_BLOCK - 1]); | |
718 | ||
719 | while (block_timestamp > tracer->last_timestamp) { | |
6533380d | 720 | /* Check block override if it's not the first block */ |
c71ad41c FD |
721 | if (!tracer->last_timestamp) { |
722 | u64 *ts_event; | |
723 | /* To avoid block override be the HW in case of buffer | |
724 | * wraparound, the time stamp of the previous block | |
725 | * should be compared to the last timestamp handled | |
726 | * by the driver. | |
727 | */ | |
728 | prev_consumer_index = | |
729 | (tracer->buff.consumer_index - 1) & (block_count - 1); | |
730 | prev_start_offset = prev_consumer_index * TRACER_BLOCK_SIZE_BYTE; | |
731 | ||
732 | ts_event = tracer->buff.log_buf + prev_start_offset + | |
733 | (TRACES_PER_BLOCK - 1) * trace_event_size; | |
734 | last_block_timestamp = get_block_timestamp(tracer, ts_event); | |
735 | /* If previous timestamp different from last stored | |
736 | * timestamp then there is a good chance that the | |
737 | * current buffer is overwritten and therefore should | |
738 | * not be parsed. | |
739 | */ | |
740 | if (tracer->last_timestamp != last_block_timestamp) { | |
741 | mlx5_core_warn(dev, "FWTracer: Events were lost\n"); | |
742 | tracer->last_timestamp = block_timestamp; | |
743 | tracer->buff.consumer_index = | |
744 | (tracer->buff.consumer_index + 1) & (block_count - 1); | |
745 | break; | |
746 | } | |
747 | } | |
748 | ||
749 | /* Parse events */ | |
70dd6fdb | 750 | for (i = 0; i < TRACES_PER_BLOCK ; i++) { |
c71ad41c | 751 | poll_trace(tracer, &tracer_event, &tmp_trace_block[i]); |
70dd6fdb FD |
752 | mlx5_tracer_handle_trace(tracer, &tracer_event); |
753 | } | |
c71ad41c FD |
754 | |
755 | tracer->buff.consumer_index = | |
756 | (tracer->buff.consumer_index + 1) & (block_count - 1); | |
757 | ||
758 | tracer->last_timestamp = block_timestamp; | |
759 | start_offset = tracer->buff.consumer_index * TRACER_BLOCK_SIZE_BYTE; | |
760 | memcpy(tmp_trace_block, tracer->buff.log_buf + start_offset, | |
761 | TRACER_BLOCK_SIZE_BYTE); | |
762 | block_timestamp = get_block_timestamp(tracer, | |
763 | &tmp_trace_block[TRACES_PER_BLOCK - 1]); | |
f53aaa31 FD |
764 | } |
765 | ||
8bf94e64 | 766 | arm: |
c71ad41c FD |
767 | mlx5_fw_tracer_arm(dev); |
768 | } | |
769 | ||
770 | static int mlx5_fw_tracer_set_mtrc_conf(struct mlx5_fw_tracer *tracer) | |
771 | { | |
772 | struct mlx5_core_dev *dev = tracer->dev; | |
773 | u32 out[MLX5_ST_SZ_DW(mtrc_conf)] = {0}; | |
774 | u32 in[MLX5_ST_SZ_DW(mtrc_conf)] = {0}; | |
775 | int err; | |
776 | ||
777 | MLX5_SET(mtrc_conf, in, trace_mode, TRACE_TO_MEMORY); | |
778 | MLX5_SET(mtrc_conf, in, log_trace_buffer_size, | |
779 | ilog2(TRACER_BUFFER_PAGE_NUM)); | |
83fec3f1 | 780 | MLX5_SET(mtrc_conf, in, trace_mkey, tracer->buff.mkey); |
c71ad41c FD |
781 | |
782 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), | |
783 | MLX5_REG_MTRC_CONF, 0, 1); | |
784 | if (err) | |
785 | mlx5_core_warn(dev, "FWTracer: Failed to set tracer configurations %d\n", err); | |
786 | ||
184e1e44 | 787 | tracer->buff.consumer_index = 0; |
c71ad41c FD |
788 | return err; |
789 | } | |
790 | ||
791 | static int mlx5_fw_tracer_set_mtrc_ctrl(struct mlx5_fw_tracer *tracer, u8 status, u8 arm) | |
792 | { | |
793 | struct mlx5_core_dev *dev = tracer->dev; | |
794 | u32 out[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0}; | |
795 | u32 in[MLX5_ST_SZ_DW(mtrc_ctrl)] = {0}; | |
796 | int err; | |
797 | ||
798 | MLX5_SET(mtrc_ctrl, in, modify_field_select, TRACE_STATUS); | |
799 | MLX5_SET(mtrc_ctrl, in, trace_status, status); | |
800 | MLX5_SET(mtrc_ctrl, in, arm_event, arm); | |
801 | ||
802 | err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), | |
803 | MLX5_REG_MTRC_CTRL, 0, 1); | |
804 | ||
805 | if (!err && status) | |
806 | tracer->last_timestamp = 0; | |
807 | ||
808 | return err; | |
809 | } | |
810 | ||
811 | static int mlx5_fw_tracer_start(struct mlx5_fw_tracer *tracer) | |
812 | { | |
813 | struct mlx5_core_dev *dev = tracer->dev; | |
814 | int err; | |
815 | ||
f53aaa31 FD |
816 | err = mlx5_fw_tracer_ownership_acquire(tracer); |
817 | if (err) { | |
818 | mlx5_core_dbg(dev, "FWTracer: Ownership was not granted %d\n", err); | |
c71ad41c FD |
819 | /* Don't fail since ownership can be acquired on a later FW event */ |
820 | return 0; | |
821 | } | |
822 | ||
823 | err = mlx5_fw_tracer_set_mtrc_conf(tracer); | |
824 | if (err) { | |
825 | mlx5_core_warn(dev, "FWTracer: Failed to set tracer configuration %d\n", err); | |
826 | goto release_ownership; | |
827 | } | |
828 | ||
829 | /* enable tracer & trace events */ | |
830 | err = mlx5_fw_tracer_set_mtrc_ctrl(tracer, 1, 1); | |
831 | if (err) { | |
832 | mlx5_core_warn(dev, "FWTracer: Failed to enable tracer %d\n", err); | |
833 | goto release_ownership; | |
834 | } | |
835 | ||
3101d1fc | 836 | mlx5_core_dbg(dev, "FWTracer: Ownership granted and active\n"); |
c71ad41c FD |
837 | return 0; |
838 | ||
839 | release_ownership: | |
840 | mlx5_fw_tracer_ownership_release(tracer); | |
841 | return err; | |
842 | } | |
843 | ||
844 | static void mlx5_fw_tracer_ownership_change(struct work_struct *work) | |
845 | { | |
846 | struct mlx5_fw_tracer *tracer = | |
847 | container_of(work, struct mlx5_fw_tracer, ownership_change_work); | |
848 | ||
3101d1fc | 849 | mlx5_core_dbg(tracer->dev, "FWTracer: ownership changed, current=(%d)\n", tracer->owner); |
c71ad41c | 850 | if (tracer->owner) { |
92fd3963 | 851 | mlx5_fw_tracer_ownership_acquire(tracer); |
f53aaa31 FD |
852 | return; |
853 | } | |
c71ad41c FD |
854 | |
855 | mlx5_fw_tracer_start(tracer); | |
f53aaa31 FD |
856 | } |
857 | ||
fd1483fe MS |
858 | static int mlx5_fw_tracer_set_core_dump_reg(struct mlx5_core_dev *dev, |
859 | u32 *in, int size_in) | |
860 | { | |
861 | u32 out[MLX5_ST_SZ_DW(core_dump_reg)] = {}; | |
862 | ||
863 | if (!MLX5_CAP_DEBUG(dev, core_dump_general) && | |
864 | !MLX5_CAP_DEBUG(dev, core_dump_qp)) | |
865 | return -EOPNOTSUPP; | |
866 | ||
867 | return mlx5_core_access_reg(dev, in, size_in, out, sizeof(out), | |
868 | MLX5_REG_CORE_DUMP, 0, 1); | |
869 | } | |
870 | ||
871 | int mlx5_fw_tracer_trigger_core_dump_general(struct mlx5_core_dev *dev) | |
872 | { | |
873 | struct mlx5_fw_tracer *tracer = dev->tracer; | |
874 | u32 in[MLX5_ST_SZ_DW(core_dump_reg)] = {}; | |
875 | int err; | |
876 | ||
877 | if (!MLX5_CAP_DEBUG(dev, core_dump_general) || !tracer) | |
878 | return -EOPNOTSUPP; | |
879 | if (!tracer->owner) | |
880 | return -EPERM; | |
881 | ||
882 | MLX5_SET(core_dump_reg, in, core_dump_type, 0x0); | |
883 | ||
884 | err = mlx5_fw_tracer_set_core_dump_reg(dev, in, sizeof(in)); | |
885 | if (err) | |
886 | return err; | |
887 | queue_work(tracer->work_queue, &tracer->handle_traces_work); | |
888 | flush_workqueue(tracer->work_queue); | |
889 | return 0; | |
890 | } | |
891 | ||
892 | static int | |
893 | mlx5_devlink_fmsg_fill_trace(struct devlink_fmsg *fmsg, | |
894 | struct mlx5_fw_trace_data *trace_data) | |
895 | { | |
896 | int err; | |
897 | ||
898 | err = devlink_fmsg_obj_nest_start(fmsg); | |
899 | if (err) | |
900 | return err; | |
901 | ||
902 | err = devlink_fmsg_u64_pair_put(fmsg, "timestamp", trace_data->timestamp); | |
903 | if (err) | |
904 | return err; | |
905 | ||
906 | err = devlink_fmsg_bool_pair_put(fmsg, "lost", trace_data->lost); | |
907 | if (err) | |
908 | return err; | |
909 | ||
910 | err = devlink_fmsg_u8_pair_put(fmsg, "event_id", trace_data->event_id); | |
911 | if (err) | |
912 | return err; | |
913 | ||
914 | err = devlink_fmsg_string_pair_put(fmsg, "msg", trace_data->msg); | |
915 | if (err) | |
916 | return err; | |
917 | ||
918 | err = devlink_fmsg_obj_nest_end(fmsg); | |
919 | if (err) | |
920 | return err; | |
921 | return 0; | |
922 | } | |
923 | ||
924 | int mlx5_fw_tracer_get_saved_traces_objects(struct mlx5_fw_tracer *tracer, | |
925 | struct devlink_fmsg *fmsg) | |
926 | { | |
927 | struct mlx5_fw_trace_data *straces = tracer->st_arr.straces; | |
928 | u32 index, start_index, end_index; | |
929 | u32 saved_traces_index; | |
930 | int err; | |
931 | ||
932 | if (!straces[0].timestamp) | |
933 | return -ENOMSG; | |
934 | ||
935 | mutex_lock(&tracer->st_arr.lock); | |
936 | saved_traces_index = tracer->st_arr.saved_traces_index; | |
937 | if (straces[saved_traces_index].timestamp) | |
938 | start_index = saved_traces_index; | |
939 | else | |
940 | start_index = 0; | |
941 | end_index = (saved_traces_index - 1) & (SAVED_TRACES_NUM - 1); | |
942 | ||
943 | err = devlink_fmsg_arr_pair_nest_start(fmsg, "dump fw traces"); | |
944 | if (err) | |
945 | goto unlock; | |
946 | index = start_index; | |
947 | while (index != end_index) { | |
948 | err = mlx5_devlink_fmsg_fill_trace(fmsg, &straces[index]); | |
949 | if (err) | |
950 | goto unlock; | |
951 | ||
952 | index = (index + 1) & (SAVED_TRACES_NUM - 1); | |
953 | } | |
954 | ||
955 | err = devlink_fmsg_arr_pair_nest_end(fmsg); | |
956 | unlock: | |
957 | mutex_unlock(&tracer->st_arr.lock); | |
958 | return err; | |
959 | } | |
960 | ||
7dfcd110 SD |
961 | static void mlx5_fw_tracer_update_db(struct work_struct *work) |
962 | { | |
963 | struct mlx5_fw_tracer *tracer = | |
964 | container_of(work, struct mlx5_fw_tracer, update_db_work); | |
965 | ||
966 | mlx5_fw_tracer_reload(tracer); | |
967 | } | |
968 | ||
c71ad41c | 969 | /* Create software resources (Buffers, etc ..) */ |
f53aaa31 FD |
970 | struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev) |
971 | { | |
972 | struct mlx5_fw_tracer *tracer = NULL; | |
973 | int err; | |
974 | ||
975 | if (!MLX5_CAP_MCAM_REG(dev, tracer_registers)) { | |
976 | mlx5_core_dbg(dev, "FWTracer: Tracer capability not present\n"); | |
977 | return NULL; | |
978 | } | |
979 | ||
a019b361 | 980 | tracer = kvzalloc(sizeof(*tracer), GFP_KERNEL); |
f53aaa31 FD |
981 | if (!tracer) |
982 | return ERR_PTR(-ENOMEM); | |
983 | ||
984 | tracer->work_queue = create_singlethread_workqueue("mlx5_fw_tracer"); | |
985 | if (!tracer->work_queue) { | |
986 | err = -ENOMEM; | |
987 | goto free_tracer; | |
988 | } | |
989 | ||
990 | tracer->dev = dev; | |
991 | ||
70dd6fdb | 992 | INIT_LIST_HEAD(&tracer->ready_strings_list); |
f53aaa31 | 993 | INIT_WORK(&tracer->ownership_change_work, mlx5_fw_tracer_ownership_change); |
48967ffd | 994 | INIT_WORK(&tracer->read_fw_strings_work, mlx5_tracer_read_strings_db); |
c71ad41c | 995 | INIT_WORK(&tracer->handle_traces_work, mlx5_fw_tracer_handle_traces); |
7dfcd110 SD |
996 | INIT_WORK(&tracer->update_db_work, mlx5_fw_tracer_update_db); |
997 | mutex_init(&tracer->state_lock); | |
c71ad41c | 998 | |
f53aaa31 FD |
999 | |
1000 | err = mlx5_query_mtrc_caps(tracer); | |
1001 | if (err) { | |
1002 | mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err); | |
1003 | goto destroy_workqueue; | |
1004 | } | |
1005 | ||
48967ffd FD |
1006 | err = mlx5_fw_tracer_create_log_buf(tracer); |
1007 | if (err) { | |
1008 | mlx5_core_warn(dev, "FWTracer: Create log buffer failed %d\n", err); | |
1009 | goto destroy_workqueue; | |
1010 | } | |
1011 | ||
1012 | err = mlx5_fw_tracer_allocate_strings_db(tracer); | |
1013 | if (err) { | |
1014 | mlx5_core_warn(dev, "FWTracer: Allocate strings database failed %d\n", err); | |
1015 | goto free_log_buf; | |
1016 | } | |
f53aaa31 | 1017 | |
fd1483fe | 1018 | mlx5_fw_tracer_init_saved_traces_array(tracer); |
3101d1fc SM |
1019 | mlx5_core_dbg(dev, "FWTracer: Tracer created\n"); |
1020 | ||
f53aaa31 FD |
1021 | return tracer; |
1022 | ||
48967ffd FD |
1023 | free_log_buf: |
1024 | mlx5_fw_tracer_destroy_log_buf(tracer); | |
f53aaa31 FD |
1025 | destroy_workqueue: |
1026 | tracer->dev = NULL; | |
1027 | destroy_workqueue(tracer->work_queue); | |
1028 | free_tracer: | |
a019b361 | 1029 | kvfree(tracer); |
f53aaa31 FD |
1030 | return ERR_PTR(err); |
1031 | } | |
1032 | ||
720a936d SM |
1033 | static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void *data); |
1034 | ||
1035 | /* Create HW resources + start tracer */ | |
48967ffd | 1036 | int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer) |
f53aaa31 | 1037 | { |
48967ffd FD |
1038 | struct mlx5_core_dev *dev; |
1039 | int err; | |
1040 | ||
1041 | if (IS_ERR_OR_NULL(tracer)) | |
1042 | return 0; | |
1043 | ||
48967ffd FD |
1044 | if (!tracer->str_db.loaded) |
1045 | queue_work(tracer->work_queue, &tracer->read_fw_strings_work); | |
1046 | ||
7dfcd110 SD |
1047 | mutex_lock(&tracer->state_lock); |
1048 | if (test_and_set_bit(MLX5_TRACER_STATE_UP, &tracer->state)) | |
1049 | goto unlock; | |
1050 | ||
1051 | dev = tracer->dev; | |
1052 | ||
e9cad2ce | 1053 | err = mlx5_core_alloc_pd(dev, &tracer->buff.pdn); |
48967ffd | 1054 | if (err) { |
e9cad2ce | 1055 | mlx5_core_warn(dev, "FWTracer: Failed to allocate PD %d\n", err); |
dfe6fd72 | 1056 | goto err_cancel_work; |
48967ffd FD |
1057 | } |
1058 | ||
e9cad2ce SM |
1059 | err = mlx5_fw_tracer_create_mkey(tracer); |
1060 | if (err) { | |
1061 | mlx5_core_warn(dev, "FWTracer: Failed to create mkey %d\n", err); | |
1062 | goto err_dealloc_pd; | |
1063 | } | |
1064 | ||
720a936d SM |
1065 | MLX5_NB_INIT(&tracer->nb, fw_tracer_event, DEVICE_TRACER); |
1066 | mlx5_eq_notifier_register(dev, &tracer->nb); | |
1067 | ||
bd37c288 AL |
1068 | err = mlx5_fw_tracer_start(tracer); |
1069 | if (err) { | |
1070 | mlx5_core_warn(dev, "FWTracer: Failed to start tracer %d\n", err); | |
1071 | goto err_notifier_unregister; | |
1072 | } | |
7dfcd110 SD |
1073 | unlock: |
1074 | mutex_unlock(&tracer->state_lock); | |
48967ffd | 1075 | return 0; |
c71ad41c | 1076 | |
bd37c288 AL |
1077 | err_notifier_unregister: |
1078 | mlx5_eq_notifier_unregister(dev, &tracer->nb); | |
83fec3f1 | 1079 | mlx5_core_destroy_mkey(dev, tracer->buff.mkey); |
e9cad2ce SM |
1080 | err_dealloc_pd: |
1081 | mlx5_core_dealloc_pd(dev, tracer->buff.pdn); | |
dfe6fd72 | 1082 | err_cancel_work: |
bd37c288 | 1083 | cancel_work_sync(&tracer->read_fw_strings_work); |
7dfcd110 | 1084 | mutex_unlock(&tracer->state_lock); |
e9cad2ce | 1085 | return err; |
48967ffd FD |
1086 | } |
1087 | ||
720a936d | 1088 | /* Stop tracer + Cleanup HW resources */ |
48967ffd FD |
1089 | void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer) |
1090 | { | |
1091 | if (IS_ERR_OR_NULL(tracer)) | |
f53aaa31 FD |
1092 | return; |
1093 | ||
7dfcd110 SD |
1094 | mutex_lock(&tracer->state_lock); |
1095 | if (!test_and_clear_bit(MLX5_TRACER_STATE_UP, &tracer->state)) | |
1096 | goto unlock; | |
1097 | ||
3101d1fc SM |
1098 | mlx5_core_dbg(tracer->dev, "FWTracer: Cleanup, is owner ? (%d)\n", |
1099 | tracer->owner); | |
720a936d | 1100 | mlx5_eq_notifier_unregister(tracer->dev, &tracer->nb); |
f53aaa31 | 1101 | cancel_work_sync(&tracer->ownership_change_work); |
c71ad41c | 1102 | cancel_work_sync(&tracer->handle_traces_work); |
7dfcd110 SD |
1103 | /* It is valid to get here from update_db_work. Hence, don't wait for |
1104 | * update_db_work to finished. | |
1105 | */ | |
1106 | cancel_work(&tracer->update_db_work); | |
f53aaa31 FD |
1107 | |
1108 | if (tracer->owner) | |
1109 | mlx5_fw_tracer_ownership_release(tracer); | |
e9cad2ce | 1110 | |
83fec3f1 | 1111 | mlx5_core_destroy_mkey(tracer->dev, tracer->buff.mkey); |
e9cad2ce | 1112 | mlx5_core_dealloc_pd(tracer->dev, tracer->buff.pdn); |
7dfcd110 SD |
1113 | unlock: |
1114 | mutex_unlock(&tracer->state_lock); | |
48967ffd | 1115 | } |
f53aaa31 | 1116 | |
c71ad41c | 1117 | /* Free software resources (Buffers, etc ..) */ |
48967ffd FD |
1118 | void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer) |
1119 | { | |
1120 | if (IS_ERR_OR_NULL(tracer)) | |
1121 | return; | |
1122 | ||
3101d1fc SM |
1123 | mlx5_core_dbg(tracer->dev, "FWTracer: Destroy\n"); |
1124 | ||
48967ffd | 1125 | cancel_work_sync(&tracer->read_fw_strings_work); |
70dd6fdb FD |
1126 | mlx5_fw_tracer_clean_ready_list(tracer); |
1127 | mlx5_fw_tracer_clean_print_hash(tracer); | |
fd1483fe | 1128 | mlx5_fw_tracer_clean_saved_traces_array(tracer); |
48967ffd FD |
1129 | mlx5_fw_tracer_free_strings_db(tracer); |
1130 | mlx5_fw_tracer_destroy_log_buf(tracer); | |
7dfcd110 | 1131 | mutex_destroy(&tracer->state_lock); |
f53aaa31 | 1132 | destroy_workqueue(tracer->work_queue); |
a019b361 | 1133 | kvfree(tracer); |
f53aaa31 | 1134 | } |
48967ffd | 1135 | |
2d693567 MS |
1136 | static int mlx5_fw_tracer_recreate_strings_db(struct mlx5_fw_tracer *tracer) |
1137 | { | |
1138 | struct mlx5_core_dev *dev; | |
1139 | int err; | |
1140 | ||
7dfcd110 SD |
1141 | if (test_and_set_bit(MLX5_TRACER_RECREATE_DB, &tracer->state)) |
1142 | return 0; | |
2d693567 MS |
1143 | cancel_work_sync(&tracer->read_fw_strings_work); |
1144 | mlx5_fw_tracer_clean_ready_list(tracer); | |
1145 | mlx5_fw_tracer_clean_print_hash(tracer); | |
1146 | mlx5_fw_tracer_clean_saved_traces_array(tracer); | |
1147 | mlx5_fw_tracer_free_strings_db(tracer); | |
1148 | ||
1149 | dev = tracer->dev; | |
1150 | err = mlx5_query_mtrc_caps(tracer); | |
1151 | if (err) { | |
1152 | mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err); | |
7dfcd110 | 1153 | goto out; |
2d693567 MS |
1154 | } |
1155 | ||
1156 | err = mlx5_fw_tracer_allocate_strings_db(tracer); | |
1157 | if (err) { | |
1158 | mlx5_core_warn(dev, "FWTracer: Allocate strings DB failed %d\n", err); | |
7dfcd110 | 1159 | goto out; |
2d693567 MS |
1160 | } |
1161 | mlx5_fw_tracer_init_saved_traces_array(tracer); | |
7dfcd110 SD |
1162 | out: |
1163 | clear_bit(MLX5_TRACER_RECREATE_DB, &tracer->state); | |
1164 | return err; | |
2d693567 MS |
1165 | } |
1166 | ||
1167 | int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer) | |
1168 | { | |
1169 | struct mlx5_core_dev *dev; | |
1170 | int err; | |
1171 | ||
1172 | if (IS_ERR_OR_NULL(tracer)) | |
7e615b99 | 1173 | return 0; |
2d693567 MS |
1174 | |
1175 | dev = tracer->dev; | |
1176 | mlx5_fw_tracer_cleanup(tracer); | |
1177 | err = mlx5_fw_tracer_recreate_strings_db(tracer); | |
1178 | if (err) { | |
1179 | mlx5_core_warn(dev, "Failed to recreate FW tracer strings DB\n"); | |
1180 | return err; | |
1181 | } | |
1182 | err = mlx5_fw_tracer_init(tracer); | |
1183 | if (err) { | |
1184 | mlx5_core_warn(dev, "Failed to re-initialize FW tracer\n"); | |
1185 | return err; | |
1186 | } | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
720a936d | 1191 | static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void *data) |
c71ad41c | 1192 | { |
720a936d SM |
1193 | struct mlx5_fw_tracer *tracer = mlx5_nb_cof(nb, struct mlx5_fw_tracer, nb); |
1194 | struct mlx5_core_dev *dev = tracer->dev; | |
1195 | struct mlx5_eqe *eqe = data; | |
c71ad41c FD |
1196 | |
1197 | switch (eqe->sub_type) { | |
1198 | case MLX5_TRACER_SUBTYPE_OWNERSHIP_CHANGE: | |
7ad67a20 | 1199 | queue_work(tracer->work_queue, &tracer->ownership_change_work); |
c71ad41c FD |
1200 | break; |
1201 | case MLX5_TRACER_SUBTYPE_TRACES_AVAILABLE: | |
8bf94e64 | 1202 | queue_work(tracer->work_queue, &tracer->handle_traces_work); |
c71ad41c | 1203 | break; |
7dfcd110 SD |
1204 | case MLX5_TRACER_SUBTYPE_STRINGS_DB_UPDATE: |
1205 | queue_work(tracer->work_queue, &tracer->update_db_work); | |
1206 | break; | |
c71ad41c FD |
1207 | default: |
1208 | mlx5_core_dbg(dev, "FWTracer: Event with unrecognized subtype: sub_type %d\n", | |
1209 | eqe->sub_type); | |
1210 | } | |
720a936d SM |
1211 | |
1212 | return NOTIFY_OK; | |
c71ad41c FD |
1213 | } |
1214 | ||
48967ffd | 1215 | EXPORT_TRACEPOINT_SYMBOL(mlx5_fw); |