root/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c

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DEFINITIONS

This source file includes following definitions.
  1. mlx5_register_debugfs
  2. mlx5_unregister_debugfs
  3. mlx5_qp_debugfs_init
  4. mlx5_qp_debugfs_cleanup
  5. mlx5_eq_debugfs_init
  6. mlx5_eq_debugfs_cleanup
  7. average_read
  8. average_write
  9. mlx5_cmdif_debugfs_init
  10. mlx5_cmdif_debugfs_cleanup
  11. mlx5_cq_debugfs_init
  12. mlx5_cq_debugfs_cleanup
  13. qp_read_field
  14. mlx5_core_eq_query
  15. eq_read_field
  16. cq_read_field
  17. dbg_read
  18. add_res_tree
  19. rem_res_tree
  20. mlx5_debug_qp_add
  21. mlx5_debug_qp_remove
  22. mlx5_debug_eq_add
  23. mlx5_debug_eq_remove
  24. mlx5_debug_cq_add
  25. mlx5_debug_cq_remove

   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 #include "lib/eq.h"
  40 
  41 enum {
  42         QP_PID,
  43         QP_STATE,
  44         QP_XPORT,
  45         QP_MTU,
  46         QP_N_RECV,
  47         QP_RECV_SZ,
  48         QP_N_SEND,
  49         QP_LOG_PG_SZ,
  50         QP_RQPN,
  51 };
  52 
  53 static char *qp_fields[] = {
  54         [QP_PID]        = "pid",
  55         [QP_STATE]      = "state",
  56         [QP_XPORT]      = "transport",
  57         [QP_MTU]        = "mtu",
  58         [QP_N_RECV]     = "num_recv",
  59         [QP_RECV_SZ]    = "rcv_wqe_sz",
  60         [QP_N_SEND]     = "num_send",
  61         [QP_LOG_PG_SZ]  = "log2_page_sz",
  62         [QP_RQPN]       = "remote_qpn",
  63 };
  64 
  65 enum {
  66         EQ_NUM_EQES,
  67         EQ_INTR,
  68         EQ_LOG_PG_SZ,
  69 };
  70 
  71 static char *eq_fields[] = {
  72         [EQ_NUM_EQES]   = "num_eqes",
  73         [EQ_INTR]       = "intr",
  74         [EQ_LOG_PG_SZ]  = "log_page_size",
  75 };
  76 
  77 enum {
  78         CQ_PID,
  79         CQ_NUM_CQES,
  80         CQ_LOG_PG_SZ,
  81 };
  82 
  83 static char *cq_fields[] = {
  84         [CQ_PID]        = "pid",
  85         [CQ_NUM_CQES]   = "num_cqes",
  86         [CQ_LOG_PG_SZ]  = "log_page_size",
  87 };
  88 
  89 struct dentry *mlx5_debugfs_root;
  90 EXPORT_SYMBOL(mlx5_debugfs_root);
  91 
  92 void mlx5_register_debugfs(void)
  93 {
  94         mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL);
  95 }
  96 
  97 void mlx5_unregister_debugfs(void)
  98 {
  99         debugfs_remove(mlx5_debugfs_root);
 100 }
 101 
 102 void mlx5_qp_debugfs_init(struct mlx5_core_dev *dev)
 103 {
 104         atomic_set(&dev->num_qps, 0);
 105 
 106         dev->priv.qp_debugfs = debugfs_create_dir("QPs",  dev->priv.dbg_root);
 107 }
 108 
 109 void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
 110 {
 111         debugfs_remove_recursive(dev->priv.qp_debugfs);
 112 }
 113 
 114 void mlx5_eq_debugfs_init(struct mlx5_core_dev *dev)
 115 {
 116         dev->priv.eq_debugfs = debugfs_create_dir("EQs",  dev->priv.dbg_root);
 117 }
 118 
 119 void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev)
 120 {
 121         debugfs_remove_recursive(dev->priv.eq_debugfs);
 122 }
 123 
 124 static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 125                             loff_t *pos)
 126 {
 127         struct mlx5_cmd_stats *stats;
 128         u64 field = 0;
 129         int ret;
 130         char tbuf[22];
 131 
 132         stats = filp->private_data;
 133         spin_lock_irq(&stats->lock);
 134         if (stats->n)
 135                 field = div64_u64(stats->sum, stats->n);
 136         spin_unlock_irq(&stats->lock);
 137         ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
 138         return simple_read_from_buffer(buf, count, pos, tbuf, ret);
 139 }
 140 
 141 static ssize_t average_write(struct file *filp, const char __user *buf,
 142                              size_t count, loff_t *pos)
 143 {
 144         struct mlx5_cmd_stats *stats;
 145 
 146         stats = filp->private_data;
 147         spin_lock_irq(&stats->lock);
 148         stats->sum = 0;
 149         stats->n = 0;
 150         spin_unlock_irq(&stats->lock);
 151 
 152         *pos += count;
 153 
 154         return count;
 155 }
 156 
 157 static const struct file_operations stats_fops = {
 158         .owner  = THIS_MODULE,
 159         .open   = simple_open,
 160         .read   = average_read,
 161         .write  = average_write,
 162 };
 163 
 164 void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
 165 {
 166         struct mlx5_cmd_stats *stats;
 167         struct dentry **cmd;
 168         const char *namep;
 169         int i;
 170 
 171         cmd = &dev->priv.cmdif_debugfs;
 172         *cmd = debugfs_create_dir("commands", dev->priv.dbg_root);
 173 
 174         for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) {
 175                 stats = &dev->cmd.stats[i];
 176                 namep = mlx5_command_str(i);
 177                 if (strcmp(namep, "unknown command opcode")) {
 178                         stats->root = debugfs_create_dir(namep, *cmd);
 179 
 180                         debugfs_create_file("average", 0400, stats->root, stats,
 181                                             &stats_fops);
 182                         debugfs_create_u64("n", 0400, stats->root, &stats->n);
 183                 }
 184         }
 185 }
 186 
 187 void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev)
 188 {
 189         debugfs_remove_recursive(dev->priv.cmdif_debugfs);
 190 }
 191 
 192 void mlx5_cq_debugfs_init(struct mlx5_core_dev *dev)
 193 {
 194         dev->priv.cq_debugfs = debugfs_create_dir("CQs",  dev->priv.dbg_root);
 195 }
 196 
 197 void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev)
 198 {
 199         debugfs_remove_recursive(dev->priv.cq_debugfs);
 200 }
 201 
 202 static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
 203                          int index, int *is_str)
 204 {
 205         int outlen = MLX5_ST_SZ_BYTES(query_qp_out);
 206         struct mlx5_qp_context *ctx;
 207         u64 param = 0;
 208         u32 *out;
 209         int err;
 210         int no_sq;
 211 
 212         out = kzalloc(outlen, GFP_KERNEL);
 213         if (!out)
 214                 return param;
 215 
 216         err = mlx5_core_qp_query(dev, qp, out, outlen);
 217         if (err) {
 218                 mlx5_core_warn(dev, "failed to query qp err=%d\n", err);
 219                 goto out;
 220         }
 221 
 222         *is_str = 0;
 223 
 224         /* FIXME: use MLX5_GET rather than mlx5_qp_context manual struct */
 225         ctx = (struct mlx5_qp_context *)MLX5_ADDR_OF(query_qp_out, out, qpc);
 226 
 227         switch (index) {
 228         case QP_PID:
 229                 param = qp->pid;
 230                 break;
 231         case QP_STATE:
 232                 param = (unsigned long)mlx5_qp_state_str(be32_to_cpu(ctx->flags) >> 28);
 233                 *is_str = 1;
 234                 break;
 235         case QP_XPORT:
 236                 param = (unsigned long)mlx5_qp_type_str((be32_to_cpu(ctx->flags) >> 16) & 0xff);
 237                 *is_str = 1;
 238                 break;
 239         case QP_MTU:
 240                 switch (ctx->mtu_msgmax >> 5) {
 241                 case IB_MTU_256:
 242                         param = 256;
 243                         break;
 244                 case IB_MTU_512:
 245                         param = 512;
 246                         break;
 247                 case IB_MTU_1024:
 248                         param = 1024;
 249                         break;
 250                 case IB_MTU_2048:
 251                         param = 2048;
 252                         break;
 253                 case IB_MTU_4096:
 254                         param = 4096;
 255                         break;
 256                 default:
 257                         param = 0;
 258                 }
 259                 break;
 260         case QP_N_RECV:
 261                 param = 1 << ((ctx->rq_size_stride >> 3) & 0xf);
 262                 break;
 263         case QP_RECV_SZ:
 264                 param = 1 << ((ctx->rq_size_stride & 7) + 4);
 265                 break;
 266         case QP_N_SEND:
 267                 no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15;
 268                 if (!no_sq)
 269                         param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11);
 270                 else
 271                         param = 0;
 272                 break;
 273         case QP_LOG_PG_SZ:
 274                 param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f;
 275                 param += 12;
 276                 break;
 277         case QP_RQPN:
 278                 param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff;
 279                 break;
 280         }
 281 
 282 out:
 283         kfree(out);
 284         return param;
 285 }
 286 
 287 static int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
 288                               u32 *out, int outlen)
 289 {
 290         u32 in[MLX5_ST_SZ_DW(query_eq_in)] = {};
 291 
 292         MLX5_SET(query_eq_in, in, opcode, MLX5_CMD_OP_QUERY_EQ);
 293         MLX5_SET(query_eq_in, in, eq_number, eq->eqn);
 294         return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
 295 }
 296 
 297 static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
 298                          int index)
 299 {
 300         int outlen = MLX5_ST_SZ_BYTES(query_eq_out);
 301         u64 param = 0;
 302         void *ctx;
 303         u32 *out;
 304         int err;
 305 
 306         out = kzalloc(outlen, GFP_KERNEL);
 307         if (!out)
 308                 return param;
 309 
 310         err = mlx5_core_eq_query(dev, eq, out, outlen);
 311         if (err) {
 312                 mlx5_core_warn(dev, "failed to query eq\n");
 313                 goto out;
 314         }
 315         ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry);
 316 
 317         switch (index) {
 318         case EQ_NUM_EQES:
 319                 param = 1 << MLX5_GET(eqc, ctx, log_eq_size);
 320                 break;
 321         case EQ_INTR:
 322                 param = MLX5_GET(eqc, ctx, intr);
 323                 break;
 324         case EQ_LOG_PG_SZ:
 325                 param = MLX5_GET(eqc, ctx, log_page_size) + 12;
 326                 break;
 327         }
 328 
 329 out:
 330         kfree(out);
 331         return param;
 332 }
 333 
 334 static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 335                          int index)
 336 {
 337         int outlen = MLX5_ST_SZ_BYTES(query_cq_out);
 338         u64 param = 0;
 339         void *ctx;
 340         u32 *out;
 341         int err;
 342 
 343         out = kvzalloc(outlen, GFP_KERNEL);
 344         if (!out)
 345                 return param;
 346 
 347         err = mlx5_core_query_cq(dev, cq, out, outlen);
 348         if (err) {
 349                 mlx5_core_warn(dev, "failed to query cq\n");
 350                 goto out;
 351         }
 352         ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context);
 353 
 354         switch (index) {
 355         case CQ_PID:
 356                 param = cq->pid;
 357                 break;
 358         case CQ_NUM_CQES:
 359                 param = 1 << MLX5_GET(cqc, ctx, log_cq_size);
 360                 break;
 361         case CQ_LOG_PG_SZ:
 362                 param = MLX5_GET(cqc, ctx, log_page_size);
 363                 break;
 364         }
 365 
 366 out:
 367         kvfree(out);
 368         return param;
 369 }
 370 
 371 static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 372                         loff_t *pos)
 373 {
 374         struct mlx5_field_desc *desc;
 375         struct mlx5_rsc_debug *d;
 376         char tbuf[18];
 377         int is_str = 0;
 378         u64 field;
 379         int ret;
 380 
 381         desc = filp->private_data;
 382         d = (void *)(desc - desc->i) - sizeof(*d);
 383         switch (d->type) {
 384         case MLX5_DBG_RSC_QP:
 385                 field = qp_read_field(d->dev, d->object, desc->i, &is_str);
 386                 break;
 387 
 388         case MLX5_DBG_RSC_EQ:
 389                 field = eq_read_field(d->dev, d->object, desc->i);
 390                 break;
 391 
 392         case MLX5_DBG_RSC_CQ:
 393                 field = cq_read_field(d->dev, d->object, desc->i);
 394                 break;
 395 
 396         default:
 397                 mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
 398                 return -EINVAL;
 399         }
 400 
 401         if (is_str)
 402                 ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field);
 403         else
 404                 ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
 405 
 406         return simple_read_from_buffer(buf, count, pos, tbuf, ret);
 407 }
 408 
 409 static const struct file_operations fops = {
 410         .owner  = THIS_MODULE,
 411         .open   = simple_open,
 412         .read   = dbg_read,
 413 };
 414 
 415 static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
 416                         struct dentry *root, struct mlx5_rsc_debug **dbg,
 417                         int rsn, char **field, int nfile, void *data)
 418 {
 419         struct mlx5_rsc_debug *d;
 420         char resn[32];
 421         int i;
 422 
 423         d = kzalloc(struct_size(d, fields, nfile), GFP_KERNEL);
 424         if (!d)
 425                 return -ENOMEM;
 426 
 427         d->dev = dev;
 428         d->object = data;
 429         d->type = type;
 430         sprintf(resn, "0x%x", rsn);
 431         d->root = debugfs_create_dir(resn,  root);
 432 
 433         for (i = 0; i < nfile; i++) {
 434                 d->fields[i].i = i;
 435                 debugfs_create_file(field[i], 0400, d->root, &d->fields[i],
 436                                     &fops);
 437         }
 438         *dbg = d;
 439 
 440         return 0;
 441 }
 442 
 443 static void rem_res_tree(struct mlx5_rsc_debug *d)
 444 {
 445         debugfs_remove_recursive(d->root);
 446         kfree(d);
 447 }
 448 
 449 int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
 450 {
 451         int err;
 452 
 453         if (!mlx5_debugfs_root)
 454                 return 0;
 455 
 456         err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
 457                            &qp->dbg, qp->qpn, qp_fields,
 458                            ARRAY_SIZE(qp_fields), qp);
 459         if (err)
 460                 qp->dbg = NULL;
 461 
 462         return err;
 463 }
 464 
 465 void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
 466 {
 467         if (!mlx5_debugfs_root)
 468                 return;
 469 
 470         if (qp->dbg)
 471                 rem_res_tree(qp->dbg);
 472 }
 473 
 474 int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
 475 {
 476         int err;
 477 
 478         if (!mlx5_debugfs_root)
 479                 return 0;
 480 
 481         err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
 482                            &eq->dbg, eq->eqn, eq_fields,
 483                            ARRAY_SIZE(eq_fields), eq);
 484         if (err)
 485                 eq->dbg = NULL;
 486 
 487         return err;
 488 }
 489 
 490 void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
 491 {
 492         if (!mlx5_debugfs_root)
 493                 return;
 494 
 495         if (eq->dbg)
 496                 rem_res_tree(eq->dbg);
 497 }
 498 
 499 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
 500 {
 501         int err;
 502 
 503         if (!mlx5_debugfs_root)
 504                 return 0;
 505 
 506         err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
 507                            &cq->dbg, cq->cqn, cq_fields,
 508                            ARRAY_SIZE(cq_fields), cq);
 509         if (err)
 510                 cq->dbg = NULL;
 511 
 512         return err;
 513 }
 514 
 515 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
 516 {
 517         if (!mlx5_debugfs_root)
 518                 return;
 519 
 520         if (cq->dbg)
 521                 rem_res_tree(cq->dbg);
 522 }

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