Commit e723f866 authored by Tariq Toukan's avatar Tariq Toukan Committed by Saeed Mahameed
Browse files

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: default avatarTariq Toukan <tariqt@nvidia.com>
Reviewed-by: default avatarMoshe Shemesh <moshe@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent 606e6a72

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

+24 −0
Original line number Diff line number Diff line
@@ -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);