1 /*
2 * Copyright (c) 2013-2015, 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 */
32
33 #include <linux/debugfs.h>
34 #include <linux/mlx5/qp.h>
35 #include <linux/mlx5/cq.h>
36 #include <linux/mlx5/driver.h>
37 #include "mlx5_core.h"
38 #include "lib/eq.h"
39
40 enum {
41 QP_PID,
42 QP_STATE,
43 QP_XPORT,
44 QP_MTU,
45 QP_N_RECV,
46 QP_RECV_SZ,
47 QP_N_SEND,
48 QP_LOG_PG_SZ,
49 QP_RQPN,
50 };
51
52 static char *qp_fields[] = {
53 [QP_PID] = "pid",
54 [QP_STATE] = "state",
55 [QP_XPORT] = "transport",
56 [QP_MTU] = "mtu",
57 [QP_N_RECV] = "num_recv",
58 [QP_RECV_SZ] = "rcv_wqe_sz",
59 [QP_N_SEND] = "num_send",
60 [QP_LOG_PG_SZ] = "log2_page_sz",
61 [QP_RQPN] = "remote_qpn",
62 };
63
64 enum {
65 EQ_NUM_EQES,
66 EQ_INTR,
67 EQ_LOG_PG_SZ,
68 };
69
70 static char *eq_fields[] = {
71 [EQ_NUM_EQES] = "num_eqes",
72 [EQ_INTR] = "intr",
73 [EQ_LOG_PG_SZ] = "log_page_size",
74 };
75
76 enum {
77 CQ_PID,
78 CQ_NUM_CQES,
79 CQ_LOG_PG_SZ,
80 };
81
82 static char *cq_fields[] = {
83 [CQ_PID] = "pid",
84 [CQ_NUM_CQES] = "num_cqes",
85 [CQ_LOG_PG_SZ] = "log_page_size",
86 };
87
88 struct dentry *mlx5_debugfs_root;
89 EXPORT_SYMBOL(mlx5_debugfs_root);
90
mlx5_register_debugfs(void)91 void mlx5_register_debugfs(void)
92 {
93 mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL);
94 }
95
mlx5_unregister_debugfs(void)96 void mlx5_unregister_debugfs(void)
97 {
98 debugfs_remove(mlx5_debugfs_root);
99 }
100
mlx5_debugfs_get_dev_root(struct mlx5_core_dev * dev)101 struct dentry *mlx5_debugfs_get_dev_root(struct mlx5_core_dev *dev)
102 {
103 return dev->priv.dbg.dbg_root;
104 }
105 EXPORT_SYMBOL(mlx5_debugfs_get_dev_root);
106
mlx5_qp_debugfs_init(struct mlx5_core_dev * dev)107 void mlx5_qp_debugfs_init(struct mlx5_core_dev *dev)
108 {
109 dev->priv.dbg.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg.dbg_root);
110 }
111 EXPORT_SYMBOL(mlx5_qp_debugfs_init);
112
mlx5_qp_debugfs_cleanup(struct mlx5_core_dev * dev)113 void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
114 {
115 debugfs_remove_recursive(dev->priv.dbg.qp_debugfs);
116 }
117 EXPORT_SYMBOL(mlx5_qp_debugfs_cleanup);
118
mlx5_eq_debugfs_init(struct mlx5_core_dev * dev)119 void mlx5_eq_debugfs_init(struct mlx5_core_dev *dev)
120 {
121 dev->priv.dbg.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg.dbg_root);
122 }
123
mlx5_eq_debugfs_cleanup(struct mlx5_core_dev * dev)124 void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev)
125 {
126 debugfs_remove_recursive(dev->priv.dbg.eq_debugfs);
127 }
128
average_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)129 static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
130 loff_t *pos)
131 {
132 struct mlx5_cmd_stats *stats;
133 u64 field = 0;
134 int ret;
135 char tbuf[22];
136
137 stats = filp->private_data;
138 spin_lock_irq(&stats->lock);
139 if (stats->n)
140 field = div64_u64(stats->sum, stats->n);
141 spin_unlock_irq(&stats->lock);
142 ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
143 return simple_read_from_buffer(buf, count, pos, tbuf, ret);
144 }
145
average_write(struct file * filp,const char __user * buf,size_t count,loff_t * pos)146 static ssize_t average_write(struct file *filp, const char __user *buf,
147 size_t count, loff_t *pos)
148 {
149 struct mlx5_cmd_stats *stats;
150
151 stats = filp->private_data;
152 spin_lock_irq(&stats->lock);
153 stats->sum = 0;
154 stats->n = 0;
155 spin_unlock_irq(&stats->lock);
156
157 *pos += count;
158
159 return count;
160 }
161
162 static const struct file_operations stats_fops = {
163 .owner = THIS_MODULE,
164 .open = simple_open,
165 .read = average_read,
166 .write = average_write,
167 };
168
mlx5_cmdif_debugfs_init(struct mlx5_core_dev * dev)169 void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
170 {
171 struct mlx5_cmd_stats *stats;
172 struct dentry **cmd;
173 const char *namep;
174 int i;
175
176 cmd = &dev->priv.dbg.cmdif_debugfs;
177 *cmd = debugfs_create_dir("commands", dev->priv.dbg.dbg_root);
178
179 for (i = 0; i < MLX5_CMD_OP_MAX; i++) {
180 stats = &dev->cmd.stats[i];
181 namep = mlx5_command_str(i);
182 if (strcmp(namep, "unknown command opcode")) {
183 stats->root = debugfs_create_dir(namep, *cmd);
184
185 debugfs_create_file("average", 0400, stats->root, stats,
186 &stats_fops);
187 debugfs_create_u64("n", 0400, stats->root, &stats->n);
188 debugfs_create_u64("failed", 0400, stats->root, &stats->failed);
189 debugfs_create_u64("failed_mbox_status", 0400, stats->root,
190 &stats->failed_mbox_status);
191 debugfs_create_u32("last_failed_errno", 0400, stats->root,
192 &stats->last_failed_errno);
193 debugfs_create_u8("last_failed_mbox_status", 0400, stats->root,
194 &stats->last_failed_mbox_status);
195 debugfs_create_x32("last_failed_syndrome", 0400, stats->root,
196 &stats->last_failed_syndrome);
197 }
198 }
199 }
200
mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev * dev)201 void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev)
202 {
203 debugfs_remove_recursive(dev->priv.dbg.cmdif_debugfs);
204 }
205
mlx5_cq_debugfs_init(struct mlx5_core_dev * dev)206 void mlx5_cq_debugfs_init(struct mlx5_core_dev *dev)
207 {
208 dev->priv.dbg.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg.dbg_root);
209 }
210
mlx5_cq_debugfs_cleanup(struct mlx5_core_dev * dev)211 void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev)
212 {
213 debugfs_remove_recursive(dev->priv.dbg.cq_debugfs);
214 }
215
mlx5_pages_debugfs_init(struct mlx5_core_dev * dev)216 void mlx5_pages_debugfs_init(struct mlx5_core_dev *dev)
217 {
218 struct dentry *pages;
219
220 dev->priv.dbg.pages_debugfs = debugfs_create_dir("pages", dev->priv.dbg.dbg_root);
221 pages = dev->priv.dbg.pages_debugfs;
222
223 debugfs_create_u32("fw_pages_total", 0400, pages, &dev->priv.fw_pages);
224 debugfs_create_u32("fw_pages_vfs", 0400, pages, &dev->priv.vfs_pages);
225 debugfs_create_u32("fw_pages_host_pf", 0400, pages, &dev->priv.host_pf_pages);
226 debugfs_create_u32("fw_pages_alloc_failed", 0400, pages, &dev->priv.fw_pages_alloc_failed);
227 debugfs_create_u32("fw_pages_give_dropped", 0400, pages, &dev->priv.give_pages_dropped);
228 debugfs_create_u32("fw_pages_reclaim_discard", 0400, pages,
229 &dev->priv.reclaim_pages_discard);
230 }
231
mlx5_pages_debugfs_cleanup(struct mlx5_core_dev * dev)232 void mlx5_pages_debugfs_cleanup(struct mlx5_core_dev *dev)
233 {
234 debugfs_remove_recursive(dev->priv.dbg.pages_debugfs);
235 }
236
qp_read_field(struct mlx5_core_dev * dev,struct mlx5_core_qp * qp,int index,int * is_str)237 static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
238 int index, int *is_str)
239 {
240 int outlen = MLX5_ST_SZ_BYTES(query_qp_out);
241 u32 in[MLX5_ST_SZ_DW(query_qp_in)] = {};
242 u64 param = 0;
243 u32 *out;
244 int state;
245 u32 *qpc;
246 int err;
247
248 out = kzalloc(outlen, GFP_KERNEL);
249 if (!out)
250 return 0;
251
252 MLX5_SET(query_qp_in, in, opcode, MLX5_CMD_OP_QUERY_QP);
253 MLX5_SET(query_qp_in, in, qpn, qp->qpn);
254 err = mlx5_cmd_exec_inout(dev, query_qp, in, out);
255 if (err)
256 goto out;
257
258 *is_str = 0;
259
260 qpc = MLX5_ADDR_OF(query_qp_out, out, qpc);
261 switch (index) {
262 case QP_PID:
263 param = qp->pid;
264 break;
265 case QP_STATE:
266 state = MLX5_GET(qpc, qpc, state);
267 param = (unsigned long)mlx5_qp_state_str(state);
268 *is_str = 1;
269 break;
270 case QP_XPORT:
271 param = (unsigned long)mlx5_qp_type_str(MLX5_GET(qpc, qpc, st));
272 *is_str = 1;
273 break;
274 case QP_MTU:
275 switch (MLX5_GET(qpc, qpc, mtu)) {
276 case IB_MTU_256:
277 param = 256;
278 break;
279 case IB_MTU_512:
280 param = 512;
281 break;
282 case IB_MTU_1024:
283 param = 1024;
284 break;
285 case IB_MTU_2048:
286 param = 2048;
287 break;
288 case IB_MTU_4096:
289 param = 4096;
290 break;
291 default:
292 param = 0;
293 }
294 break;
295 case QP_N_RECV:
296 param = 1 << MLX5_GET(qpc, qpc, log_rq_size);
297 break;
298 case QP_RECV_SZ:
299 param = 1 << (MLX5_GET(qpc, qpc, log_rq_stride) + 4);
300 break;
301 case QP_N_SEND:
302 if (!MLX5_GET(qpc, qpc, no_sq))
303 param = 1 << MLX5_GET(qpc, qpc, log_sq_size);
304 break;
305 case QP_LOG_PG_SZ:
306 param = MLX5_GET(qpc, qpc, log_page_size) + 12;
307 break;
308 case QP_RQPN:
309 param = MLX5_GET(qpc, qpc, remote_qpn);
310 break;
311 }
312 out:
313 kfree(out);
314 return param;
315 }
316
eq_read_field(struct mlx5_core_dev * dev,struct mlx5_eq * eq,int index)317 static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
318 int index)
319 {
320 int outlen = MLX5_ST_SZ_BYTES(query_eq_out);
321 u32 in[MLX5_ST_SZ_DW(query_eq_in)] = {};
322 u64 param = 0;
323 void *ctx;
324 u32 *out;
325 int err;
326
327 out = kzalloc(outlen, GFP_KERNEL);
328 if (!out)
329 return param;
330
331 MLX5_SET(query_eq_in, in, opcode, MLX5_CMD_OP_QUERY_EQ);
332 MLX5_SET(query_eq_in, in, eq_number, eq->eqn);
333 err = mlx5_cmd_exec_inout(dev, query_eq, in, out);
334 if (err) {
335 mlx5_core_warn(dev, "failed to query eq\n");
336 goto out;
337 }
338 ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry);
339
340 switch (index) {
341 case EQ_NUM_EQES:
342 param = 1 << MLX5_GET(eqc, ctx, log_eq_size);
343 break;
344 case EQ_INTR:
345 param = MLX5_GET(eqc, ctx, intr);
346 break;
347 case EQ_LOG_PG_SZ:
348 param = MLX5_GET(eqc, ctx, log_page_size) + 12;
349 break;
350 }
351
352 out:
353 kfree(out);
354 return param;
355 }
356
cq_read_field(struct mlx5_core_dev * dev,struct mlx5_core_cq * cq,int index)357 static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
358 int index)
359 {
360 int outlen = MLX5_ST_SZ_BYTES(query_cq_out);
361 u64 param = 0;
362 void *ctx;
363 u32 *out;
364 int err;
365
366 out = kvzalloc(outlen, GFP_KERNEL);
367 if (!out)
368 return param;
369
370 err = mlx5_core_query_cq(dev, cq, out);
371 if (err) {
372 mlx5_core_warn(dev, "failed to query cq\n");
373 goto out;
374 }
375 ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context);
376
377 switch (index) {
378 case CQ_PID:
379 param = cq->pid;
380 break;
381 case CQ_NUM_CQES:
382 param = 1 << MLX5_GET(cqc, ctx, log_cq_size);
383 break;
384 case CQ_LOG_PG_SZ:
385 param = MLX5_GET(cqc, ctx, log_page_size);
386 break;
387 }
388
389 out:
390 kvfree(out);
391 return param;
392 }
393
dbg_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)394 static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
395 loff_t *pos)
396 {
397 struct mlx5_field_desc *desc;
398 struct mlx5_rsc_debug *d;
399 char tbuf[18];
400 int is_str = 0;
401 u64 field;
402 int ret;
403
404 desc = filp->private_data;
405 d = (void *)(desc - desc->i) - sizeof(*d);
406 switch (d->type) {
407 case MLX5_DBG_RSC_QP:
408 field = qp_read_field(d->dev, d->object, desc->i, &is_str);
409 break;
410
411 case MLX5_DBG_RSC_EQ:
412 field = eq_read_field(d->dev, d->object, desc->i);
413 break;
414
415 case MLX5_DBG_RSC_CQ:
416 field = cq_read_field(d->dev, d->object, desc->i);
417 break;
418
419 default:
420 mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
421 return -EINVAL;
422 }
423
424 if (is_str)
425 ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field);
426 else
427 ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
428
429 return simple_read_from_buffer(buf, count, pos, tbuf, ret);
430 }
431
432 static const struct file_operations fops = {
433 .owner = THIS_MODULE,
434 .open = simple_open,
435 .read = dbg_read,
436 };
437
add_res_tree(struct mlx5_core_dev * dev,enum dbg_rsc_type type,struct dentry * root,struct mlx5_rsc_debug ** dbg,int rsn,char ** field,int nfile,void * data)438 static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
439 struct dentry *root, struct mlx5_rsc_debug **dbg,
440 int rsn, char **field, int nfile, void *data)
441 {
442 struct mlx5_rsc_debug *d;
443 char resn[32];
444 int i;
445
446 d = kzalloc(struct_size(d, fields, nfile), GFP_KERNEL);
447 if (!d)
448 return -ENOMEM;
449
450 d->dev = dev;
451 d->object = data;
452 d->type = type;
453 sprintf(resn, "0x%x", rsn);
454 d->root = debugfs_create_dir(resn, root);
455
456 for (i = 0; i < nfile; i++) {
457 d->fields[i].i = i;
458 debugfs_create_file(field[i], 0400, d->root, &d->fields[i],
459 &fops);
460 }
461 *dbg = d;
462
463 return 0;
464 }
465
rem_res_tree(struct mlx5_rsc_debug * d)466 static void rem_res_tree(struct mlx5_rsc_debug *d)
467 {
468 debugfs_remove_recursive(d->root);
469 kfree(d);
470 }
471
mlx5_debug_qp_add(struct mlx5_core_dev * dev,struct mlx5_core_qp * qp)472 int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
473 {
474 int err;
475
476 if (!mlx5_debugfs_root)
477 return 0;
478
479 err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.dbg.qp_debugfs,
480 &qp->dbg, qp->qpn, qp_fields,
481 ARRAY_SIZE(qp_fields), qp);
482 if (err)
483 qp->dbg = NULL;
484
485 return err;
486 }
487 EXPORT_SYMBOL(mlx5_debug_qp_add);
488
mlx5_debug_qp_remove(struct mlx5_core_dev * dev,struct mlx5_core_qp * qp)489 void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
490 {
491 if (!mlx5_debugfs_root)
492 return;
493
494 if (qp->dbg)
495 rem_res_tree(qp->dbg);
496 }
497 EXPORT_SYMBOL(mlx5_debug_qp_remove);
498
mlx5_debug_eq_add(struct mlx5_core_dev * dev,struct mlx5_eq * eq)499 int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
500 {
501 int err;
502
503 if (!mlx5_debugfs_root)
504 return 0;
505
506 err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.dbg.eq_debugfs,
507 &eq->dbg, eq->eqn, eq_fields,
508 ARRAY_SIZE(eq_fields), eq);
509 if (err)
510 eq->dbg = NULL;
511
512 return err;
513 }
514
mlx5_debug_eq_remove(struct mlx5_core_dev * dev,struct mlx5_eq * eq)515 void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
516 {
517 if (!mlx5_debugfs_root)
518 return;
519
520 if (eq->dbg)
521 rem_res_tree(eq->dbg);
522 }
523
mlx5_debug_cq_add(struct mlx5_core_dev * dev,struct mlx5_core_cq * cq)524 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
525 {
526 int err;
527
528 if (!mlx5_debugfs_root)
529 return 0;
530
531 err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.dbg.cq_debugfs,
532 &cq->dbg, cq->cqn, cq_fields,
533 ARRAY_SIZE(cq_fields), cq);
534 if (err)
535 cq->dbg = NULL;
536
537 return err;
538 }
539
mlx5_debug_cq_remove(struct mlx5_core_dev * dev,struct mlx5_core_cq * cq)540 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
541 {
542 if (!mlx5_debugfs_root)
543 return;
544
545 if (cq->dbg) {
546 rem_res_tree(cq->dbg);
547 cq->dbg = NULL;
548 }
549 }
550