1 files changed, 587 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
new file mode 100644
index 000000000000..5e9cf2b9aaf7
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
@@ -0,0 +1,587 @@
+/*
+ * 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;
+	int err;
+	char tbuf[22];
+
+	if (*pos)
+		return 0;
+
+	stats = filp->private_data;
+	spin_lock(&stats->lock);
+	if (stats->n)
+		field = stats->sum / stats->n;
+	spin_unlock(&stats->lock);
+	ret = snprintf(tbuf, sizeof(tbuf), "%llu\n", field);
+	if (ret > 0) {
+		err = copy_to_user(buf, tbuf, ret);
+		if (err)
+			return err;
+	}
+
+	*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 = ((cpu_to_be32(ctx->log_pg_sz_remote_qpn) >> 24) & 0x1f);
+		param += 12;
+		break;
+	case QP_RQPN:
+		param = cpu_to_be32(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;
+	int err;
+
+	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) {
+		err = copy_to_user(buf, tbuf, ret);
+		if (err)
+			return err;
+	}
+
+	*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);
+}