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net/mlx5: Expose vhca_id to debugfs 

hca_id is an identifier of an mlx5_core instance within the hardware.
This identifier may be required for troubleshooting.

Expose it to debugfs.

Example:

$ cat /sys/kernel/debug/mlx5/mlx5_core.sf.2/vhca_id
0x12

Signed-off-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Eli Cohen 2022-09-21 13:33:29 +03:00 committed by Saeed Mahameed
parent 71b75f0e02
commit dd3dd7263c
1 changed files with 11 additions and 0 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/main.c
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@ -1588,6 +1588,16 @@ err:
return -ENOMEM;
}
static int vhca_id_show(struct seq_file *file, void *priv)
{
struct mlx5_core_dev *dev = file->private;
seq_printf(file, "0x%x\n", MLX5_CAP_GEN(dev, vhca_id));
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vhca_id);
int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
{
struct mlx5_priv *priv = &dev->priv;
@ -1612,6 +1622,7 @@ int mlx5_mdev_init(struct mlx5_core_dev *dev, int profile_idx)
priv->numa_node = dev_to_node(mlx5_core_dma_dev(dev));
priv->dbg.dbg_root = debugfs_create_dir(dev_name(dev->device),
mlx5_debugfs_root);
debugfs_create_file("vhca_id", 0400, priv->dbg.dbg_root, dev, &vhca_id_fops);
INIT_LIST_HEAD(&priv->traps);
err = mlx5_tout_init(dev);