diff mbox series

[net-next,04/15] net/mlx5: Expose vhca_id to debugfs

Message ID 20221112102147.496378-5-saeed@kernel.org (mailing list archive)
State Accepted
Commit dd3dd7263cdeac601d0ecc5f04d87eee0a8277aa
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/15] net/mlx5: Bridge, Use debug instead of warn if entry doesn't exists | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Pull request is its own cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 85 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Saeed Mahameed Nov. 12, 2022, 10:21 a.m. UTC 
From: Eli Cohen <elic@nvidia.com>

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>
---
 drivers/net/ethernet/mellanox/mlx5/core/main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 9e6da51b7481..6d7c102861ea 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1588,6 +1588,16 @@  static int mlx5_hca_caps_alloc(struct mlx5_core_dev *dev)
 	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);