[linux-block.git] / drivers / net / ethernet / mellanox / mlx5 / core / debugfs.c

/*
 * Copyright (c) 2013, Mellanox Technologies inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/mlx5/qp.h>
#include <linux/mlx5/cq.h>
#include <linux/mlx5/driver.h>
#include "mlx5_core.h"

enum {
	QP_PID,
	QP_STATE,
	QP_XPORT,
	QP_MTU,
	QP_N_RECV,
	QP_RECV_SZ,
	QP_N_SEND,
	QP_LOG_PG_SZ,
	QP_RQPN,
};

static char *qp_fields[] = {
	[QP_PID]	= "pid",
	[QP_STATE]	= "state",
	[QP_XPORT]	= "transport",
	[QP_MTU]	= "mtu",
	[QP_N_RECV]	= "num_recv",
	[QP_RECV_SZ]	= "rcv_wqe_sz",
	[QP_N_SEND]	= "num_send",
	[QP_LOG_PG_SZ]	= "log2_page_sz",
	[QP_RQPN]	= "remote_qpn",
};

enum {
	EQ_NUM_EQES,
	EQ_INTR,
	EQ_LOG_PG_SZ,
};

static char *eq_fields[] = {
	[EQ_NUM_EQES]	= "num_eqes",
	[EQ_INTR]	= "intr",
	[EQ_LOG_PG_SZ]	= "log_page_size",
};

enum {
	CQ_PID,
	CQ_NUM_CQES,
	CQ_LOG_PG_SZ,
};

static char *cq_fields[] = {
	[CQ_PID]	= "pid",
	[CQ_NUM_CQES]	= "num_cqes",
	[CQ_LOG_PG_SZ]	= "log_page_size",
};

struct dentry *mlx5_debugfs_root;
EXPORT_SYMBOL(mlx5_debugfs_root);

void mlx5_register_debugfs(void)
{
	mlx5_debugfs_root = debugfs_create_dir("mlx5", NULL);
	if (IS_ERR_OR_NULL(mlx5_debugfs_root))
		mlx5_debugfs_root = NULL;
}

void mlx5_unregister_debugfs(void)
{
	debugfs_remove(mlx5_debugfs_root);
}

int mlx5_qp_debugfs_init(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return 0;

	atomic_set(&dev->num_qps, 0);

	dev->priv.qp_debugfs = debugfs_create_dir("QPs",  dev->priv.dbg_root);
	if (!dev->priv.qp_debugfs)
		return -ENOMEM;

	return 0;
}

void mlx5_qp_debugfs_cleanup(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return;

	debugfs_remove_recursive(dev->priv.qp_debugfs);
}

int mlx5_eq_debugfs_init(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return 0;

	dev->priv.eq_debugfs = debugfs_create_dir("EQs",  dev->priv.dbg_root);
	if (!dev->priv.eq_debugfs)
		return -ENOMEM;

	return 0;
}

void mlx5_eq_debugfs_cleanup(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return;

	debugfs_remove_recursive(dev->priv.eq_debugfs);
}

static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
			    loff_t *pos)
{
	struct mlx5_cmd_stats *stats;
	u64 field = 0;
	int ret;
	char tbuf[22];

	if (*pos)
		return 0;

	stats = filp->private_data;
	spin_lock(&stats->lock);
	if (stats->n)
		field = div64_u64(stats->sum, stats->n);
	spin_unlock(&stats->lock);
	ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
	if (ret > 0) {
		if (copy_to_user(buf, tbuf, ret))
			return -EFAULT;
	}

	*pos += ret;
	return ret;
}


static ssize_t average_write(struct file *filp, const char __user *buf,
			     size_t count, loff_t *pos)
{
	struct mlx5_cmd_stats *stats;

	stats = filp->private_data;
	spin_lock(&stats->lock);
	stats->sum = 0;
	stats->n = 0;
	spin_unlock(&stats->lock);

	*pos += count;

	return count;
}

static const struct file_operations stats_fops = {
	.owner	= THIS_MODULE,
	.open	= simple_open,
	.read	= average_read,
	.write	= average_write,
};

int mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
{
	struct mlx5_cmd_stats *stats;
	struct dentry **cmd;
	const char *namep;
	int err;
	int i;

	if (!mlx5_debugfs_root)
		return 0;

	cmd = &dev->priv.cmdif_debugfs;
	*cmd = debugfs_create_dir("commands", dev->priv.dbg_root);
	if (!*cmd)
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) {
		stats = &dev->cmd.stats[i];
		namep = mlx5_command_str(i);
		if (strcmp(namep, "unknown command opcode")) {
			stats->root = debugfs_create_dir(namep, *cmd);
			if (!stats->root) {
				mlx5_core_warn(dev, "failed adding command %d\n",
					       i);
				err = -ENOMEM;
				goto out;
			}

			stats->avg = debugfs_create_file("average", 0400,
							 stats->root, stats,
							 &stats_fops);
			if (!stats->avg) {
				mlx5_core_warn(dev, "failed creating debugfs file\n");
				err = -ENOMEM;
				goto out;
			}

			stats->count = debugfs_create_u64("n", 0400,
							  stats->root,
							  &stats->n);
			if (!stats->count) {
				mlx5_core_warn(dev, "failed creating debugfs file\n");
				err = -ENOMEM;
				goto out;
			}
		}
	}

	return 0;
out:
	debugfs_remove_recursive(dev->priv.cmdif_debugfs);
	return err;
}

void mlx5_cmdif_debugfs_cleanup(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return;

	debugfs_remove_recursive(dev->priv.cmdif_debugfs);
}

int mlx5_cq_debugfs_init(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return 0;

	dev->priv.cq_debugfs = debugfs_create_dir("CQs",  dev->priv.dbg_root);
	if (!dev->priv.cq_debugfs)
		return -ENOMEM;

	return 0;
}

void mlx5_cq_debugfs_cleanup(struct mlx5_core_dev *dev)
{
	if (!mlx5_debugfs_root)
		return;

	debugfs_remove_recursive(dev->priv.cq_debugfs);
}

static u64 qp_read_field(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp,
			 int index)
{
	struct mlx5_query_qp_mbox_out *out;
	struct mlx5_qp_context *ctx;
	u64 param = 0;
	int err;
	int no_sq;

	out = kzalloc(sizeof(*out), GFP_KERNEL);
	if (!out)
		return param;

	err = mlx5_core_qp_query(dev, qp, out, sizeof(*out));
	if (err) {
		mlx5_core_warn(dev, "failed to query qp\n");
		goto out;
	}

	ctx = &out->ctx;
	switch (index) {
	case QP_PID:
		param = qp->pid;
		break;
	case QP_STATE:
		param = be32_to_cpu(ctx->flags) >> 28;
		break;
	case QP_XPORT:
		param = (be32_to_cpu(ctx->flags) >> 16) & 0xff;
		break;
	case QP_MTU:
		param = ctx->mtu_msgmax >> 5;
		break;
	case QP_N_RECV:
		param = 1 << ((ctx->rq_size_stride >> 3) & 0xf);
		break;
	case QP_RECV_SZ:
		param = 1 << ((ctx->rq_size_stride & 7) + 4);
		break;
	case QP_N_SEND:
		no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15;
		if (!no_sq)
			param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11);
		else
			param = 0;
		break;
	case QP_LOG_PG_SZ:
		param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f;
		param += 12;
		break;
	case QP_RQPN:
		param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff;
		break;
	}

out:
	kfree(out);
	return param;
}

static u64 eq_read_field(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
			 int index)
{
	struct mlx5_query_eq_mbox_out *out;
	struct mlx5_eq_context *ctx;
	u64 param = 0;
	int err;

	out = kzalloc(sizeof(*out), GFP_KERNEL);
	if (!out)
		return param;

	ctx = &out->ctx;

	err = mlx5_core_eq_query(dev, eq, out, sizeof(*out));
	if (err) {
		mlx5_core_warn(dev, "failed to query eq\n");
		goto out;
	}

	switch (index) {
	case EQ_NUM_EQES:
		param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f);
		break;
	case EQ_INTR:
		param = ctx->intr;
		break;
	case EQ_LOG_PG_SZ:
		param = (ctx->log_page_size & 0x1f) + 12;
		break;
	}

out:
	kfree(out);
	return param;
}

static u64 cq_read_field(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
			 int index)
{
	struct mlx5_query_cq_mbox_out *out;
	struct mlx5_cq_context *ctx;
	u64 param = 0;
	int err;

	out = kzalloc(sizeof(*out), GFP_KERNEL);
	if (!out)
		return param;

	ctx = &out->ctx;

	err = mlx5_core_query_cq(dev, cq, out);
	if (err) {
		mlx5_core_warn(dev, "failed to query cq\n");
		goto out;
	}

	switch (index) {
	case CQ_PID:
		param = cq->pid;
		break;
	case CQ_NUM_CQES:
		param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f);
		break;
	case CQ_LOG_PG_SZ:
		param = (ctx->log_pg_sz & 0x1f) + 12;
		break;
	}

out:
	kfree(out);
	return param;
}

static ssize_t dbg_read(struct file *filp, char __user *buf, size_t count,
			loff_t *pos)
{
	struct mlx5_field_desc *desc;
	struct mlx5_rsc_debug *d;
	char tbuf[18];
	u64 field;
	int ret;

	if (*pos)
		return 0;

	desc = filp->private_data;
	d = (void *)(desc - desc->i) - sizeof(*d);
	switch (d->type) {
	case MLX5_DBG_RSC_QP:
		field = qp_read_field(d->dev, d->object, desc->i);
		break;

	case MLX5_DBG_RSC_EQ:
		field = eq_read_field(d->dev, d->object, desc->i);
		break;

	case MLX5_DBG_RSC_CQ:
		field = cq_read_field(d->dev, d->object, desc->i);
		break;

	default:
		mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
		return -EINVAL;
	}

	ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
	if (ret > 0) {
		if (copy_to_user(buf, tbuf, ret))
			return -EFAULT;
	}

	*pos += ret;
	return ret;
}

static const struct file_operations fops = {
	.owner	= THIS_MODULE,
	.open	= simple_open,
	.read	= dbg_read,
};

static int 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)
{
	struct mlx5_rsc_debug *d;
	char resn[32];
	int err;
	int i;

	d = kzalloc(sizeof(*d) + nfile * sizeof(d->fields[0]), GFP_KERNEL);
	if (!d)
		return -ENOMEM;

	d->dev = dev;
	d->object = data;
	d->type = type;
	sprintf(resn, "0x%x", rsn);
	d->root = debugfs_create_dir(resn,  root);
	if (!d->root) {
		err = -ENOMEM;
		goto out_free;
	}

	for (i = 0; i < nfile; i++) {
		d->fields[i].i = i;
		d->fields[i].dent = debugfs_create_file(field[i], 0400,
							d->root, &d->fields[i],
							&fops);
		if (!d->fields[i].dent) {
			err = -ENOMEM;
			goto out_rem;
		}
	}
	*dbg = d;

	return 0;
out_rem:
	debugfs_remove_recursive(d->root);

out_free:
	kfree(d);
	return err;
}

static void rem_res_tree(struct mlx5_rsc_debug *d)
{
	debugfs_remove_recursive(d->root);
	kfree(d);
}

int mlx5_debug_qp_add(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
{
	int err;

	if (!mlx5_debugfs_root)
		return 0;

	err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
			   &qp->dbg, qp->qpn, qp_fields,
			   ARRAY_SIZE(qp_fields), qp);
	if (err)
		qp->dbg = NULL;

	return err;
}

void mlx5_debug_qp_remove(struct mlx5_core_dev *dev, struct mlx5_core_qp *qp)
{
	if (!mlx5_debugfs_root)
		return;

	if (qp->dbg)
		rem_res_tree(qp->dbg);
}


int mlx5_debug_eq_add(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
	int err;

	if (!mlx5_debugfs_root)
		return 0;

	err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
			   &eq->dbg, eq->eqn, eq_fields,
			   ARRAY_SIZE(eq_fields), eq);
	if (err)
		eq->dbg = NULL;

	return err;
}

void mlx5_debug_eq_remove(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
{
	if (!mlx5_debugfs_root)
		return;

	if (eq->dbg)
		rem_res_tree(eq->dbg);
}

int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
{
	int err;

	if (!mlx5_debugfs_root)
		return 0;

	err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
			   &cq->dbg, cq->cqn, cq_fields,
			   ARRAY_SIZE(cq_fields), cq);
	if (err)
		cq->dbg = NULL;

	return err;
}

void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq)
{
	if (!mlx5_debugfs_root)
		return;

	if (cq->dbg)
		rem_res_tree(cq->dbg);
}
Commit	Line	Data
e126ba97 EC	1	/*
	2	* Copyright (c) 2013, Mellanox Technologies inc. 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;
e126ba97 EC	151	char tbuf[22];
	152
	153	if (*pos)
	154	return 0;
	155
	156	stats = filp->private_data;
	157	spin_lock(&stats->lock);
	158	if (stats->n)
9a0f06fe	159	field = div64_u64(stats->sum, stats->n);
e126ba97 EC	160	spin_unlock(&stats->lock);
	161	ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
	162	if (ret > 0) {
5e631a03 DC	163	if (copy_to_user(buf, tbuf, ret))
5e631a03 DC	164	return -EFAULT;
e126ba97 EC	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(&stats->lock);
	179	stats->sum = 0;
	180	stats->n = 0;
	181	spin_unlock(&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)
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	ctx = &out->ctx;
297	switch (index) {
298	case QP_PID:
299	param = qp->pid;
300	break;
301	case QP_STATE:
302	param = be32_to_cpu(ctx->flags) >> 28;
303	break;
304	case QP_XPORT:
305	param = (be32_to_cpu(ctx->flags) >> 16) & 0xff;
306	break;
307	case QP_MTU:
308	param = ctx->mtu_msgmax >> 5;
309	break;
310	case QP_N_RECV:
311	param = 1 << ((ctx->rq_size_stride >> 3) & 0xf);
312	break;
313	case QP_RECV_SZ:
314	param = 1 << ((ctx->rq_size_stride & 7) + 4);
315	break;
316	case QP_N_SEND:
317	no_sq = be16_to_cpu(ctx->sq_crq_size) >> 15;
318	if (!no_sq)
319	param = 1 << (be16_to_cpu(ctx->sq_crq_size) >> 11);
320	else
321	param = 0;
322	break;
323	case QP_LOG_PG_SZ:
582c016e	324	param = (be32_to_cpu(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f;
e126ba97 EC	325	param += 12;
	326	break;
	327	case QP_RQPN:
582c016e	328	param = be32_to_cpu(ctx->log_pg_sz_remote_qpn) & 0xffffff;
e126ba97 EC	329	break;
	330	}
	331
	332	out:
	333	kfree(out);
	334	return param;
	335	}
	336
	337	static u64 eq_read_field(struct mlx5_core_dev dev, struct mlx5_eq eq,
	338	int index)
	339	{
	340	struct mlx5_query_eq_mbox_out *out;
	341	struct mlx5_eq_context *ctx;
	342	u64 param = 0;
	343	int err;
	344
	345	out = kzalloc(sizeof(*out), GFP_KERNEL);
	346	if (!out)
	347	return param;
	348
	349	ctx = &out->ctx;
	350
	351	err = mlx5_core_eq_query(dev, eq, out, sizeof(*out));
	352	if (err) {
	353	mlx5_core_warn(dev, "failed to query eq\n");
	354	goto out;
	355	}
	356
	357	switch (index) {
	358	case EQ_NUM_EQES:
	359	param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f);
	360	break;
	361	case EQ_INTR:
	362	param = ctx->intr;
	363	break;
	364	case EQ_LOG_PG_SZ:
	365	param = (ctx->log_page_size & 0x1f) + 12;
	366	break;
	367	}
	368
	369	out:
	370	kfree(out);
	371	return param;
	372	}
	373
	374	static u64 cq_read_field(struct mlx5_core_dev dev, struct mlx5_core_cq cq,
	375	int index)
	376	{
	377	struct mlx5_query_cq_mbox_out *out;
	378	struct mlx5_cq_context *ctx;
	379	u64 param = 0;
	380	int err;
	381
	382	out = kzalloc(sizeof(*out), GFP_KERNEL);
	383	if (!out)
	384	return param;
	385
	386	ctx = &out->ctx;
	387
	388	err = mlx5_core_query_cq(dev, cq, out);
	389	if (err) {
	390	mlx5_core_warn(dev, "failed to query cq\n");
	391	goto out;
	392	}
393
394	switch (index) {
395	case CQ_PID:
396	param = cq->pid;
397	break;
398	case CQ_NUM_CQES:
399	param = 1 << ((be32_to_cpu(ctx->log_sz_usr_page) >> 24) & 0x1f);
400	break;
401	case CQ_LOG_PG_SZ:
402	param = (ctx->log_pg_sz & 0x1f) + 12;
403	break;
404	}
405
406	out:
407	kfree(out);
408	return param;
409	}
410
411	static ssize_t dbg_read(struct file filp, char __user buf, size_t count,
412	loff_t *pos)
413	{
414	struct mlx5_field_desc *desc;
415	struct mlx5_rsc_debug *d;
416	char tbuf[18];
417	u64 field;
418	int ret;
e126ba97 EC	419
	420	if (*pos)
	421	return 0;
	422
	423	desc = filp->private_data;
	424	d = (void )(desc - desc->i) - sizeof(d);
	425	switch (d->type) {
	426	case MLX5_DBG_RSC_QP:
	427	field = qp_read_field(d->dev, d->object, desc->i);
	428	break;
	429
	430	case MLX5_DBG_RSC_EQ:
	431	field = eq_read_field(d->dev, d->object, desc->i);
	432	break;
	433
	434	case MLX5_DBG_RSC_CQ:
	435	field = cq_read_field(d->dev, d->object, desc->i);
	436	break;
	437
	438	default:
	439	mlx5_core_warn(d->dev, "invalid resource type %d\n", d->type);
	440	return -EINVAL;
	441	}
	442
	443	ret = snprintf(tbuf, sizeof(tbuf), "0x%llx\n", field);
	444	if (ret > 0) {
5e631a03 DC	445	if (copy_to_user(buf, tbuf, ret))
5e631a03 DC	446	return -EFAULT;
e126ba97 EC	447	}
	448
	449	*pos += ret;
	450	return ret;
	451	}
	452
	453	static const struct file_operations fops = {
	454	.owner = THIS_MODULE,
	455	.open = simple_open,
	456	.read = dbg_read,
	457	};
	458
	459	static int add_res_tree(struct mlx5_core_dev *dev, enum dbg_rsc_type type,
	460	struct dentry root, struct mlx5_rsc_debug *dbg,
	461	int rsn, char *field, int nfile, void data)
	462	{
	463	struct mlx5_rsc_debug *d;
	464	char resn[32];
	465	int err;
	466	int i;
	467
	468	d = kzalloc(sizeof(d) + nfile sizeof(d->fields[0]), GFP_KERNEL);
	469	if (!d)
	470	return -ENOMEM;
	471
	472	d->dev = dev;
	473	d->object = data;
	474	d->type = type;
	475	sprintf(resn, "0x%x", rsn);
	476	d->root = debugfs_create_dir(resn, root);
	477	if (!d->root) {
	478	err = -ENOMEM;
	479	goto out_free;
	480	}
	481
	482	for (i = 0; i < nfile; i++) {
	483	d->fields[i].i = i;
	484	d->fields[i].dent = debugfs_create_file(field[i], 0400,
	485	d->root, &d->fields[i],
	486	&fops);
	487	if (!d->fields[i].dent) {
	488	err = -ENOMEM;
	489	goto out_rem;
	490	}
	491	}
	492	*dbg = d;
	493
	494	return 0;
	495	out_rem:
	496	debugfs_remove_recursive(d->root);
	497
	498	out_free:
	499	kfree(d);
	500	return err;
	501	}
	502
	503	static void rem_res_tree(struct mlx5_rsc_debug *d)
	504	{
	505	debugfs_remove_recursive(d->root);
	506	kfree(d);
	507	}
	508
	509	int mlx5_debug_qp_add(struct mlx5_core_dev dev, struct mlx5_core_qp qp)
	510	{
511	int err;
512
513	if (!mlx5_debugfs_root)
514	return 0;
515
516	err = add_res_tree(dev, MLX5_DBG_RSC_QP, dev->priv.qp_debugfs,
517	&qp->dbg, qp->qpn, qp_fields,
518	ARRAY_SIZE(qp_fields), qp);
519	if (err)
520	qp->dbg = NULL;
521
522	return err;
523	}
524
525	void mlx5_debug_qp_remove(struct mlx5_core_dev dev, struct mlx5_core_qp qp)
526	{
527	if (!mlx5_debugfs_root)
528	return;
529
530	if (qp->dbg)
531	rem_res_tree(qp->dbg);
532	}
533
534
535	int mlx5_debug_eq_add(struct mlx5_core_dev dev, struct mlx5_eq eq)
536	{
537	int err;
538
539	if (!mlx5_debugfs_root)
540	return 0;
541
542	err = add_res_tree(dev, MLX5_DBG_RSC_EQ, dev->priv.eq_debugfs,
543	&eq->dbg, eq->eqn, eq_fields,
544	ARRAY_SIZE(eq_fields), eq);
545	if (err)
546	eq->dbg = NULL;
547
548	return err;
549	}
550
551	void mlx5_debug_eq_remove(struct mlx5_core_dev dev, struct mlx5_eq eq)
552	{
553	if (!mlx5_debugfs_root)
554	return;
555
556	if (eq->dbg)
557	rem_res_tree(eq->dbg);
558	}
559
560	int mlx5_debug_cq_add(struct mlx5_core_dev dev, struct mlx5_core_cq cq)
561	{
562	int err;
563
564	if (!mlx5_debugfs_root)
565	return 0;
566
567	err = add_res_tree(dev, MLX5_DBG_RSC_CQ, dev->priv.cq_debugfs,
568	&cq->dbg, cq->cqn, cq_fields,
569	ARRAY_SIZE(cq_fields), cq);
570	if (err)
571	cq->dbg = NULL;
572
573	return err;
574	}
575
576	void mlx5_debug_cq_remove(struct mlx5_core_dev dev, struct mlx5_core_cq cq)
577	{
578	if (!mlx5_debugfs_root)
579	return;
580
581	if (cq->dbg)
582	rem_res_tree(cq->dbg);
583	}