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

   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         dev->priv.qp_debugfs = debugfs_create_dir("QPs",  dev->priv.dbg_root);
 105 }
 106 EXPORT_SYMBOL(mlx5_qp_debugfs_init);
 107
 108 void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
 109 {
 110         debugfs_remove_recursive(dev->priv.qp_debugfs);
 111 }
 112 EXPORT_SYMBOL(mlx5_qp_debugfs_cleanup);
 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 < MLX5_CMD_OP_MAX; 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         u32 in[MLX5_ST_SZ_DW(query_qp_in)] = {};
 207         u64 param = 0;
 208         u32 *out;
 209         int state;
 210         u32 *qpc;
 211         int err;
 212
 213         out = kzalloc(outlen, GFP_KERNEL);
 214         if (!out)
 215                 return 0;
 216
 217         MLX5_SET(query_qp_in, in, opcode, MLX5_CMD_OP_QUERY_QP);
 218         MLX5_SET(query_qp_in, in, qpn, qp->qpn);
 219         err = mlx5_cmd_exec_inout(dev, query_qp, in, out);
 220         if (err)
 221                 goto out;
 222
 223         *is_str = 0;
 224
 225         qpc = MLX5_ADDR_OF(query_qp_out, out, qpc);
 226         switch (index) {
 227         case QP_PID:
 228                 param = qp->pid;
 229                 break;
 230         case QP_STATE:
 231                 state = MLX5_GET(qpc, qpc, state);
 232                 param = (unsigned long)mlx5_qp_state_str(state);
 233                 *is_str = 1;
 234                 break;
 235         case QP_XPORT:
 236                 param = (unsigned long)mlx5_qp_type_str(MLX5_GET(qpc, qpc, st));
 237                 *is_str = 1;
 238                 break;
 239         case QP_MTU:
 240                 switch (MLX5_GET(qpc, qpc, mtu)) {
 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 << MLX5_GET(qpc, qpc, log_rq_size);
 262                 break;
 263         case QP_RECV_SZ:
 264                 param = 1 << (MLX5_GET(qpc, qpc, log_rq_stride) + 4);
 265                 break;
 266         case QP_N_SEND:
 267                 if (!MLX5_GET(qpc, qpc, no_sq))
 268                         param = 1 << MLX5_GET(qpc, qpc, log_sq_size);
 269                 break;
 270         case QP_LOG_PG_SZ:
 271                 param = MLX5_GET(qpc, qpc, log_page_size) + 12;
 272                 break;
 273         case QP_RQPN:
 274                 param = MLX5_GET(qpc, qpc, remote_qpn);
 275                 break;
 276         }
 277 out:
 278         kfree(out);
 279         return param;
 280 }
 281
 282 static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
 283                          int index)
 284 {
 285         int outlen = MLX5_ST_SZ_BYTES(query_eq_out);
 286         u32 in[MLX5_ST_SZ_DW(query_eq_in)] = {};
 287         u64 param = 0;
 288         void *ctx;
 289         u32 *out;
 290         int err;
 291
 292         out = kzalloc(outlen, GFP_KERNEL);
 293         if (!out)
 294                 return param;
 295
 296         MLX5_SET(query_eq_in, in, opcode, MLX5_CMD_OP_QUERY_EQ);
 297         MLX5_SET(query_eq_in, in, eq_number, eq->eqn);
 298         err = mlx5_cmd_exec_inout(dev, query_eq, in, out);
 299         if (err) {
 300                 mlx5_core_warn(dev, "failed to query eq\n");
 301                 goto out;
 302         }
 303         ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry);
 304
 305         switch (index) {
 306         case EQ_NUM_EQES:
 307                 param = 1 << MLX5_GET(eqc, ctx, log_eq_size);
 308                 break;
 309         case EQ_INTR:
 310                 param = MLX5_GET(eqc, ctx, intr);
 311                 break;
 312         case EQ_LOG_PG_SZ:
 313                 param = MLX5_GET(eqc, ctx, log_page_size) + 12;
 314                 break;
 315         }
 316
 317 out:
 318         kfree(out);
 319         return param;
 320 }
 321
 322 static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 323                          int index)
 324 {
 325         int outlen = MLX5_ST_SZ_BYTES(query_cq_out);
 326         u64 param = 0;
 327         void *ctx;
 328         u32 *out;
 329         int err;
 330
 331         out = kvzalloc(outlen, GFP_KERNEL);
 332         if (!out)
 333                 return param;
 334
 335         err = mlx5_core_query_cq(dev, cq, out);
 336         if (err) {
 337                 mlx5_core_warn(dev, "failed to query cq\n");
 338                 goto out;
 339         }
 340         ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context);
 341
 342         switch (index) {
 343         case CQ_PID:
 344                 param = cq->pid;
 345                 break;
 346         case CQ_NUM_CQES:
 347                 param = 1 << MLX5_GET(cqc, ctx, log_cq_size);
 348                 break;
 349         case CQ_LOG_PG_SZ:
 350                 param = MLX5_GET(cqc, ctx, log_page_size);
 351                 break;
 352         }
 353
 354 out:
 355         kvfree(out);
 356         return param;
 357 }
 358
 359 static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
 360                         loff_t *pos)
 361 {
 362         struct mlx5_field_desc *desc;
 363         struct mlx5_rsc_debug *d;
 364         char tbuf[18];
 365         int is_str = 0;
 366         u64 field;
 367         int ret;
 368
 369         desc = filp->private_data;
 370         d = (void *)(desc - desc->i) - sizeof(*d);
 371         switch (d->type) {
 372         case MLX5_DBG_RSC_QP:
 373                 field = qp_read_field(d->dev, d->object, desc->i, &is_str);
 374                 break;
 375
 376         case MLX5_DBG_RSC_EQ:
 377                 field = eq_read_field(d->dev, d->object, desc->i);
 378                 break;
 379
 380         case MLX5_DBG_RSC_CQ:
 381                 field = cq_read_field(d->dev, d->object, desc->i);
 382                 break;
 383
 384         default:
 385                 mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
 386                 return -EINVAL;
 387         }
 388
 389         if (is_str)
 390                 ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field);
 391         else
 392                 ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
 393
 394         return simple_read_from_buffer(buf, count, pos, tbuf, ret);
 395 }
 396
 397 static const struct file_operations fops = {
 398         .owner  = THIS_MODULE,
 399         .open   = simple_open,
 400         .read   = dbg_read,
 401 };
 402
 403 static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
 404                         struct dentry *root, struct mlx5_rsc_debug **dbg,
 405                         int rsn, char **field, int nfile, void *data)
 406 {
 407         struct mlx5_rsc_debug *d;
 408         char resn[32];
 409         int i;
 410
 411         d = kzalloc(struct_size(d, fields, nfile), GFP_KERNEL);
 412         if (!d)
 413                 return -ENOMEM;
 414
 415         d->dev = dev;
 416         d->object = data;
 417         d->type = type;
 418         sprintf(resn, "0x%x", rsn);
 419         d->root = debugfs_create_dir(resn,  root);
 420
 421         for (i = 0; i < nfile; i++) {
 422                 d->fields[i].i = i;
 423                 debugfs_create_file(field[i], 0400, d->root, &d->fields[i],
 424                                     &fops);
 425         }
 426         *dbg = d;
 427
 428         return 0;
 429 }
 430
 431 static void rem_res_tree(struct mlx5_rsc_debug *d)
 432 {
 433         debugfs_remove_recursive(d->root);
 434         kfree(d);
 435 }
 436
 437 int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
 438 {
 439         int err;
 440
 441         if (!mlx5_debugfs_root)
 442                 return 0;
 443
 444         err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
 445                            &qp->dbg, qp->qpn, qp_fields,
 446                            ARRAY_SIZE(qp_fields), qp);
 447         if (err)
 448                 qp->dbg = NULL;
 449
 450         return err;
 451 }
 452 EXPORT_SYMBOL(mlx5_debug_qp_add);
 453
 454 void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
 455 {
 456         if (!mlx5_debugfs_root)
 457                 return;
 458
 459         if (qp->dbg)
 460                 rem_res_tree(qp->dbg);
 461 }
 462 EXPORT_SYMBOL(mlx5_debug_qp_remove);
 463
 464 int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
 465 {
 466         int err;
 467
 468         if (!mlx5_debugfs_root)
 469                 return 0;
 470
 471         err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
 472                            &eq->dbg, eq->eqn, eq_fields,
 473                            ARRAY_SIZE(eq_fields), eq);
 474         if (err)
 475                 eq->dbg = NULL;
 476
 477         return err;
 478 }
 479
 480 void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
 481 {
 482         if (!mlx5_debugfs_root)
 483                 return;
 484
 485         if (eq->dbg)
 486                 rem_res_tree(eq->dbg);
 487 }
 488
 489 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
 490 {
 491         int err;
 492
 493         if (!mlx5_debugfs_root)
 494                 return 0;
 495
 496         err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
 497                            &cq->dbg, cq->cqn, cq_fields,
 498                            ARRAY_SIZE(cq_fields), cq);
 499         if (err)
 500                 cq->dbg = NULL;
 501
 502         return err;
 503 }
 504
 505 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
 506 {
 507         if (!mlx5_debugfs_root)
 508                 return;
 509
 510         if (cq->dbg)
 511                 rem_res_tree(cq->dbg);
 512 }