2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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6 * General Public License (GPL) Version 2, available from the file
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15 * copyright notice, this list of conditions and the following
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23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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"
52 static char *qp_fields[] = {
55 [QP_XPORT] = "transport",
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",
70 static char *eq_fields[] = {
71 [EQ_NUM_EQES] = "num_eqes",
73 [EQ_LOG_PG_SZ] = "log_page_size",
82 static char *cq_fields[] = {
84 [CQ_NUM_CQES] = "num_cqes",
85 [CQ_LOG_PG_SZ] = "log_page_size",
88 struct dentry *mlx5_debugfs_root;
89 EXPORT_SYMBOL(mlx5_debugfs_root);
91 void mlx5_register_debugfs(void)
93 mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL);
94 if (IS_ERR_OR_NULL(mlx5_debugfs_root))
95 mlx5_debugfs_root = NULL;
98 void mlx5_unregister_debugfs(void)
100 debugfs_remove(mlx5_debugfs_root);
103 int mlx5_qp_debugfs_init(struct mlx5_core_dev *dev)
105 if (!mlx5_debugfs_root)
108 atomic_set(&dev->num_qps, 0);
110 dev->priv.qp_debugfs = debugfs_create_dir("QPs", dev->priv.dbg_root);
111 if (!dev->priv.qp_debugfs)
117 void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
119 if (!mlx5_debugfs_root)
122 debugfs_remove_recursive(dev->priv.qp_debugfs);
125 int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev)
127 if (!mlx5_debugfs_root)
130 dev->priv.eq_debugfs = debugfs_create_dir("EQs", dev->priv.dbg_root);
131 if (!dev->priv.eq_debugfs)
137 void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev)
139 if (!mlx5_debugfs_root)
142 debugfs_remove_recursive(dev->priv.eq_debugfs);
145 static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
148 struct mlx5_cmd_stats *stats;
156 stats = filp->private_data;
157 spin_lock_irq(&stats->lock);
159 field = div64_u64(stats->sum, stats->n);
160 spin_unlock_irq(&stats->lock);
161 ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
163 if (copy_to_user(buf, tbuf, ret))
172 static ssize_t average_write(struct file *filp, const char __user *buf,
173 size_t count, loff_t *pos)
175 struct mlx5_cmd_stats *stats;
177 stats = filp->private_data;
178 spin_lock_irq(&stats->lock);
181 spin_unlock_irq(&stats->lock);
188 static const struct file_operations stats_fops = {
189 .owner = THIS_MODULE,
191 .read = average_read,
192 .write = average_write,
195 int mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
197 struct mlx5_cmd_stats *stats;
203 if (!mlx5_debugfs_root)
206 cmd = &dev->priv.cmdif_debugfs;
207 *cmd = debugfs_create_dir("commands", dev->priv.dbg_root);
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);
217 mlx5_core_warn(dev, "failed adding command %d\n",
223 stats->avg = debugfs_create_file("average", 0400,
227 mlx5_core_warn(dev, "failed creating debugfs file\n");
232 stats->count = debugfs_create_u64("n", 0400,
236 mlx5_core_warn(dev, "failed creating debugfs file\n");
245 debugfs_remove_recursive(dev->priv.cmdif_debugfs);
249 void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev)
251 if (!mlx5_debugfs_root)
254 debugfs_remove_recursive(dev->priv.cmdif_debugfs);
257 int mlx5_cq_debugfs_init(struct mlx5_core_dev *dev)
259 if (!mlx5_debugfs_root)
262 dev->priv.cq_debugfs = debugfs_create_dir("CQs", dev->priv.dbg_root);
263 if (!dev->priv.cq_debugfs)
269 void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev)
271 if (!mlx5_debugfs_root)
274 debugfs_remove_recursive(dev->priv.cq_debugfs);
277 static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
278 int index, int *is_str)
280 int outlen = MLX5_ST_SZ_BYTES(query_qp_out);
281 struct mlx5_qp_context *ctx;
287 out = kzalloc(outlen, GFP_KERNEL);
291 err = mlx5_core_qp_query(dev, qp, out, outlen);
293 mlx5_core_warn(dev, "failed to query qp err=%d\n", err);
299 /* FIXME: use MLX5_GET rather than mlx5_qp_context manual struct */
300 ctx = (struct mlx5_qp_context *)MLX5_ADDR_OF(query_qp_out, out, qpc);
307 param = (unsigned long)mlx5_qp_state_str(be32_to_cpu(ctx->flags) >> 28);
311 param = (unsigned long)mlx5_qp_type_str((be32_to_cpu(ctx->flags) >> 16) & 0xff);
315 switch (ctx->mtu_msgmax >> 5) {
336 param = 1 << ((ctx->rq_size_stride >> 3) & 0xf);
339 param = 1 << ((ctx->rq_size_stride & 7) + 4);
342 no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15;
344 param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11);
349 param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f;
353 param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff;
362 static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
365 int outlen = MLX5_ST_SZ_BYTES(query_eq_out);
371 out = kzalloc(outlen, GFP_KERNEL);
375 err = mlx5_core_eq_query(dev, eq, out, outlen);
377 mlx5_core_warn(dev, "failed to query eq\n");
380 ctx = MLX5_ADDR_OF(query_eq_out, out, eq_context_entry);
384 param = 1 << MLX5_GET(eqc, ctx, log_eq_size);
387 param = MLX5_GET(eqc, ctx, intr);
390 param = MLX5_GET(eqc, ctx, log_page_size) + 12;
399 static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
402 int outlen = MLX5_ST_SZ_BYTES(query_cq_out);
408 out = mlx5_vzalloc(outlen);
412 err = mlx5_core_query_cq(dev, cq, out, outlen);
414 mlx5_core_warn(dev, "failed to query cq\n");
417 ctx = MLX5_ADDR_OF(query_cq_out, out, cq_context);
424 param = 1 << MLX5_GET(cqc, ctx, log_cq_size);
427 param = MLX5_GET(cqc, ctx, log_page_size);
436 static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
439 struct mlx5_field_desc *desc;
440 struct mlx5_rsc_debug *d;
449 desc = filp->private_data;
450 d = (void *)(desc - desc->i) - sizeof(*d);
452 case MLX5_DBG_RSC_QP:
453 field = qp_read_field(d->dev, d->object, desc->i, &is_str);
456 case MLX5_DBG_RSC_EQ:
457 field = eq_read_field(d->dev, d->object, desc->i);
460 case MLX5_DBG_RSC_CQ:
461 field = cq_read_field(d->dev, d->object, desc->i);
465 mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
471 ret = snprintf(tbuf, sizeof(tbuf), "%s\n", (const char *)(unsigned long)field);
473 ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
476 if (copy_to_user(buf, tbuf, ret))
484 static const struct file_operations fops = {
485 .owner = THIS_MODULE,
490 static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
491 struct dentry *root, struct mlx5_rsc_debug **dbg,
492 int rsn, char **field, int nfile, void *data)
494 struct mlx5_rsc_debug *d;
499 d = kzalloc(sizeof(*d) + nfile * sizeof(d->fields[0]), GFP_KERNEL);
506 sprintf(resn, "0x%x", rsn);
507 d->root = debugfs_create_dir(resn, root);
513 for (i = 0; i < nfile; i++) {
515 d->fields[i].dent = debugfs_create_file(field[i], 0400,
516 d->root, &d->fields[i],
518 if (!d->fields[i].dent) {
527 debugfs_remove_recursive(d->root);
534 static void rem_res_tree(struct mlx5_rsc_debug *d)
536 debugfs_remove_recursive(d->root);
540 int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
544 if (!mlx5_debugfs_root)
547 err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
548 &qp->dbg, qp->qpn, qp_fields,
549 ARRAY_SIZE(qp_fields), qp);
556 void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
558 if (!mlx5_debugfs_root)
562 rem_res_tree(qp->dbg);
566 int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
570 if (!mlx5_debugfs_root)
573 err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
574 &eq->dbg, eq->eqn, eq_fields,
575 ARRAY_SIZE(eq_fields), eq);
582 void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
584 if (!mlx5_debugfs_root)
588 rem_res_tree(eq->dbg);
591 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
595 if (!mlx5_debugfs_root)
598 err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
599 &cq->dbg, cq->cqn, cq_fields,
600 ARRAY_SIZE(cq_fields), cq);
607 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
609 if (!mlx5_debugfs_root)
613 rem_res_tree(cq->dbg);