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/module.h> 34 #include <linux/debugfs.h> 35 #include <linux/mlx5/qp.h> 36 #include <linux/mlx5/cq.h> 37 #include <linux/mlx5/driver.h> 38 #include "mlx5_core.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 91 void mlx5_register_debugfs(void) 92 { 93 mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL); 94 if (IS_ERR_OR_NULL(mlx5_debugfs_root)) 95 mlx5_debugfs_root = NULL; 96 } 97 98 void mlx5_unregister_debugfs(void) 99 { 100 debugfs_remove(mlx5_debugfs_root); 101 } 102 103 int mlx5_qp_debugfs_init(struct mlx5_core_dev *dev) 104 { 105 if (!mlx5_debugfs_root) 106 return 0; 107 108 atomic_set(&dev->num_qps, 0); 109 110 dev->priv.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg_root); 111 if (!dev->priv.qp_debugfs) 112 return -ENOMEM; 113 114 return 0; 115 } 116 117 void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev) 118 { 119 if (!mlx5_debugfs_root) 120 return; 121 122 debugfs_remove_recursive(dev->priv.qp_debugfs); 123 } 124 125 int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev) 126 { 127 if (!mlx5_debugfs_root) 128 return 0; 129 130 dev->priv.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg_root); 131 if (!dev->priv.eq_debugfs) 132 return -ENOMEM; 133 134 return 0; 135 } 136 137 void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev) 138 { 139 if (!mlx5_debugfs_root) 140 return; 141 142 debugfs_remove_recursive(dev->priv.eq_debugfs); 143 } 144 145 static ssize_t average_read(struct file *filp, char __user *buf, size_t count, 146 loff_t *pos) 147 { 148 struct mlx5_cmd_stats *stats; 149 u64 field = 0; 150 int ret; 151 char tbuf[22]; 152 153 if (*pos) 154 return 0; 155 156 stats = filp->private_data; 157 spin_lock_irq(&stats->lock); 158 if (stats->n) 159 field = div64_u64(stats->sum, stats->n); 160 spin_unlock_irq(&stats->lock); 161 ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field); 162 if (ret > 0) { 163 if (copy_to_user(buf, tbuf, ret)) 164 return -EFAULT; 165 } 166 167 *pos += ret; 168 return ret; 169 } 170 171 172 static ssize_t average_write(struct file *filp, const char __user *buf, 173 size_t count, loff_t *pos) 174 { 175 struct mlx5_cmd_stats *stats; 176 177 stats = filp->private_data; 178 spin_lock_irq(&stats->lock); 179 stats->sum = 0; 180 stats->n = 0; 181 spin_unlock_irq(&stats->lock); 182 183 *pos += count; 184 185 return count; 186 } 187 188 static const struct file_operations stats_fops = { 189 .owner = THIS_MODULE, 190 .open = simple_open, 191 .read = average_read, 192 .write = average_write, 193 }; 194 195 int mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev) 196 { 197 struct mlx5_cmd_stats *stats; 198 struct dentry **cmd; 199 const char *namep; 200 int err; 201 int i; 202 203 if (!mlx5_debugfs_root) 204 return 0; 205 206 cmd = &dev->priv.cmdif_debugfs; 207 *cmd = debugfs_create_dir("commands", dev->priv.dbg_root); 208 if (!*cmd) 209 return -ENOMEM; 210 211 for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) { 212 stats = &dev->cmd.stats[i]; 213 namep = mlx5_command_str(i); 214 if (strcmp(namep, "unknown command opcode")) { 215 stats->root = debugfs_create_dir(namep, *cmd); 216 if (!stats->root) { 217 mlx5_core_warn(dev, "failed adding command %d\n", 218 i); 219 err = -ENOMEM; 220 goto out; 221 } 222 223 stats->avg = debugfs_create_file("average", 0400, 224 stats->root, stats, 225 &stats_fops); 226 if (!stats->avg) { 227 mlx5_core_warn(dev, "failed creating debugfs file\n"); 228 err = -ENOMEM; 229 goto out; 230 } 231 232 stats->count = debugfs_create_u64("n", 0400, 233 stats->root, 234 &stats->n); 235 if (!stats->count) { 236 mlx5_core_warn(dev, "failed creating debugfs file\n"); 237 err = -ENOMEM; 238 goto out; 239 } 240 } 241 } 242 243 return 0; 244 out: 245 debugfs_remove_recursive(dev->priv.cmdif_debugfs); 246 return err; 247 } 248 249 void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev) 250 { 251 if (!mlx5_debugfs_root) 252 return; 253 254 debugfs_remove_recursive(dev->priv.cmdif_debugfs); 255 } 256 257 int mlx5_cq_debugfs_init(struct mlx5_core_dev *dev) 258 { 259 if (!mlx5_debugfs_root) 260 return 0; 261 262 dev->priv.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg_root); 263 if (!dev->priv.cq_debugfs) 264 return -ENOMEM; 265 266 return 0; 267 } 268 269 void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev) 270 { 271 if (!mlx5_debugfs_root) 272 return; 273 274 debugfs_remove_recursive(dev->priv.cq_debugfs); 275 } 276 277 static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp, 278 int index, int *is_str) 279 { 280 struct mlx5_query_qp_mbox_out *out; 281 struct mlx5_qp_context *ctx; 282 u64 param = 0; 283 int err; 284 int no_sq; 285 286 out = kzalloc(sizeof(*out), GFP_KERNEL); 287 if (!out) 288 return param; 289 290 err = mlx5_core_qp_query(dev, qp, out, sizeof(*out)); 291 if (err) { 292 mlx5_core_warn(dev, "failed to query qp\n"); 293 goto out; 294 } 295 296 *is_str = 0; 297 ctx = &out->ctx; 298 switch (index) { 299 case QP_PID: 300 param = qp->pid; 301 break; 302 case QP_STATE: 303 param = (unsigned long)mlx5_qp_state_str(be32_to_cpu(ctx->flags) >> 28); 304 *is_str = 1; 305 break; 306 case QP_XPORT: 307 param = (unsigned long)mlx5_qp_type_str((be32_to_cpu(ctx->flags) >> 16) & 0xff); 308 *is_str = 1; 309 break; 310 case QP_MTU: 311 switch (ctx->mtu_msgmax >> 5) { 312 case IB_MTU_256: 313 param = 256; 314 break; 315 case IB_MTU_512: 316 param = 512; 317 break; 318 case IB_MTU_1024: 319 param = 1024; 320 break; 321 case IB_MTU_2048: 322 param = 2048; 323 break; 324 case IB_MTU_4096: 325 param = 4096; 326 break; 327 default: 328 param = 0; 329 } 330 break; 331 case QP_N_RECV: 332 param = 1 << ((ctx->rq_size_stride >> 3) & 0xf); 333 break; 334 case QP_RECV_SZ: 335 param = 1 << ((ctx->rq_size_stride & 7) + 4); 336 break; 337 case QP_N_SEND: 338 no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15; 339 if (!no_sq) 340 param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11); 341 else 342 param = 0; 343 break; 344 case QP_LOG_PG_SZ: 345 param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f; 346 param += 12; 347 break; 348 case QP_RQPN: 349 param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff; 350 break; 351 } 352 353 out: 354 kfree(out); 355 return param; 356 } 357 358 static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq, 359 int index) 360 { 361 struct mlx5_query_eq_mbox_out *out; 362 struct mlx5_eq_context *ctx; 363 u64 param = 0; 364 int err; 365 366 out = kzalloc(sizeof(*out), GFP_KERNEL); 367 if (!out) 368 return param; 369 370 ctx = &out->ctx; 371 372 err = mlx5_core_eq_query(dev, eq, out, sizeof(*out)); 373 if (err) { 374 mlx5_core_warn(dev, "failed to query eq\n"); 375 goto out; 376 } 377 378 switch (index) { 379 case EQ_NUM_EQES: 380 param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f); 381 break; 382 case EQ_INTR: 383 param = ctx->intr; 384 break; 385 case EQ_LOG_PG_SZ: 386 param = (ctx->log_page_size & 0x1f) + 12; 387 break; 388 } 389 390 out: 391 kfree(out); 392 return param; 393 } 394 395 static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, 396 int index) 397 { 398 struct mlx5_query_cq_mbox_out *out; 399 struct mlx5_cq_context *ctx; 400 u64 param = 0; 401 int err; 402 403 out = kzalloc(sizeof(*out), GFP_KERNEL); 404 if (!out) 405 return param; 406 407 ctx = &out->ctx; 408 409 err = mlx5_core_query_cq(dev, cq, out); 410 if (err) { 411 mlx5_core_warn(dev, "failed to query cq\n"); 412 goto out; 413 } 414 415 switch (index) { 416 case CQ_PID: 417 param = cq->pid; 418 break; 419 case CQ_NUM_CQES: 420 param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f); 421 break; 422 case CQ_LOG_PG_SZ: 423 param = (ctx->log_pg_sz & 0x1f) + 12; 424 break; 425 } 426 427 out: 428 kfree(out); 429 return param; 430 } 431 432 static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count, 433 loff_t *pos) 434 { 435 struct mlx5_field_desc *desc; 436 struct mlx5_rsc_debug *d; 437 char tbuf[18]; 438 int is_str = 0; 439 u64 field; 440 int ret; 441 442 if (*pos) 443 return 0; 444 445 desc = filp->private_data; 446 d = (void *)(desc - desc->i) - sizeof(*d); 447 switch (d->type) { 448 case MLX5_DBG_RSC_QP: 449 field = qp_read_field(d->dev, d->object, desc->i, &is_str); 450 break; 451 452 case MLX5_DBG_RSC_EQ: 453 field = eq_read_field(d->dev, d->object, desc->i); 454 break; 455 456 case MLX5_DBG_RSC_CQ: 457 field = cq_read_field(d->dev, d->object, desc->i); 458 break; 459 460 default: 461 mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type); 462 return -EINVAL; 463 } 464 465 466 if (is_str) 467 ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field); 468 else 469 ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field); 470 471 if (ret > 0) { 472 if (copy_to_user(buf, tbuf, ret)) 473 return -EFAULT; 474 } 475 476 *pos += ret; 477 return ret; 478 } 479 480 static const struct file_operations fops = { 481 .owner = THIS_MODULE, 482 .open = simple_open, 483 .read = dbg_read, 484 }; 485 486 static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type, 487 struct dentry *root, struct mlx5_rsc_debug **dbg, 488 int rsn, char **field, int nfile, void *data) 489 { 490 struct mlx5_rsc_debug *d; 491 char resn[32]; 492 int err; 493 int i; 494 495 d = kzalloc(sizeof(*d) + nfile * sizeof(d->fields[0]), GFP_KERNEL); 496 if (!d) 497 return -ENOMEM; 498 499 d->dev = dev; 500 d->object = data; 501 d->type = type; 502 sprintf(resn, "0x%x", rsn); 503 d->root = debugfs_create_dir(resn, root); 504 if (!d->root) { 505 err = -ENOMEM; 506 goto out_free; 507 } 508 509 for (i = 0; i < nfile; i++) { 510 d->fields[i].i = i; 511 d->fields[i].dent = debugfs_create_file(field[i], 0400, 512 d->root, &d->fields[i], 513 &fops); 514 if (!d->fields[i].dent) { 515 err = -ENOMEM; 516 goto out_rem; 517 } 518 } 519 *dbg = d; 520 521 return 0; 522 out_rem: 523 debugfs_remove_recursive(d->root); 524 525 out_free: 526 kfree(d); 527 return err; 528 } 529 530 static void rem_res_tree(struct mlx5_rsc_debug *d) 531 { 532 debugfs_remove_recursive(d->root); 533 kfree(d); 534 } 535 536 int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) 537 { 538 int err; 539 540 if (!mlx5_debugfs_root) 541 return 0; 542 543 err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs, 544 &qp->dbg, qp->qpn, qp_fields, 545 ARRAY_SIZE(qp_fields), qp); 546 if (err) 547 qp->dbg = NULL; 548 549 return err; 550 } 551 552 void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp) 553 { 554 if (!mlx5_debugfs_root) 555 return; 556 557 if (qp->dbg) 558 rem_res_tree(qp->dbg); 559 } 560 561 562 int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq) 563 { 564 int err; 565 566 if (!mlx5_debugfs_root) 567 return 0; 568 569 err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs, 570 &eq->dbg, eq->eqn, eq_fields, 571 ARRAY_SIZE(eq_fields), eq); 572 if (err) 573 eq->dbg = NULL; 574 575 return err; 576 } 577 578 void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq) 579 { 580 if (!mlx5_debugfs_root) 581 return; 582 583 if (eq->dbg) 584 rem_res_tree(eq->dbg); 585 } 586 587 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) 588 { 589 int err; 590 591 if (!mlx5_debugfs_root) 592 return 0; 593 594 err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs, 595 &cq->dbg, cq->cqn, cq_fields, 596 ARRAY_SIZE(cq_fields), cq); 597 if (err) 598 cq->dbg = NULL; 599 600 return err; 601 } 602 603 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) 604 { 605 if (!mlx5_debugfs_root) 606 return; 607 608 if (cq->dbg) 609 rem_res_tree(cq->dbg); 610 } 611