diff options
| author | Tariq Toukan <tariqt@nvidia.com> | 2022-06-08 07:52:31 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@nvidia.com> | 2022-07-13 15:56:46 -0700 |
| commit | e723f8662de7dd1750c876ee94da4900ab0d0277 (patch) | |
| tree | 6c6d7ae0008b2f284b9fa8e73ee3389306fd62fa /drivers | |
| parent | 606e6a72e29dff9e3341c4cc9b554420e4793f40 (diff) | |
net/mlx5: debugfs, Add num of in-use FW command interface slots
Expose the number of busy / in-use slots in the FW command interface via
a read-only debugfs entry. This improves observability and helps in the
performance bottleneck analysis.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/debugfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c index 9caa1b52321b..3e232a65a0c3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c @@ -166,6 +166,28 @@ static const struct file_operations stats_fops = { .write = average_write, }; +static ssize_t slots_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) +{ + struct mlx5_cmd *cmd; + char tbuf[6]; + int weight; + int field; + int ret; + + cmd = filp->private_data; + weight = bitmap_weight(&cmd->bitmask, cmd->max_reg_cmds); + field = cmd->max_reg_cmds - weight; + ret = snprintf(tbuf, sizeof(tbuf), "%d\n", field); + return simple_read_from_buffer(buf, count, pos, tbuf, ret); +} + +static const struct file_operations slots_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = slots_read, +}; + void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev) { struct mlx5_cmd_stats *stats; @@ -176,6 +198,8 @@ void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev) cmd = &dev->priv.dbg.cmdif_debugfs; *cmd = debugfs_create_dir("commands", dev->priv.dbg.dbg_root); + debugfs_create_file("slots_inuse", 0400, *cmd, &dev->cmd, &slots_fops); + for (i = 0; i < MLX5_CMD_OP_MAX; i++) { stats = &dev->cmd.stats[i]; namep = mlx5_command_str(i); |