diff mbox series

[net-next,6/8] net/mlx5e: debugfs, Add reset option for command interface stats

Message ID 20240326222022.27926-7-tariqt@nvidia.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series mlx5e misc patches | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 944 this patch: 944
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: linux-rdma@vger.kernel.org
netdev/build_clang success Errors and warnings before: 955 this patch: 955
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
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: 955 this patch: 955
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 50 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-03-27--15-00 (tests: 952)

Commit Message

Tariq Toukan March 26, 2024, 10:20 p.m. UTC 
Resetting stats just before some test/debug case allows us to eliminate
out the impact of previous commands. Useful in particular for the
average latency calculation.

The average_write() callback was unreachable, as "average" is a
read-only file. Extend, rename,  and use it for a newly exposed
write-only "reset" file.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
---
 .../net/ethernet/mellanox/mlx5/core/debugfs.c | 22 ++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

Comments

Simon Horman March 28, 2024, 11:20 a.m. UTC | #1 
On Wed, Mar 27, 2024 at 12:20:20AM +0200, Tariq Toukan wrote:
> Resetting stats just before some test/debug case allows us to eliminate
> out the impact of previous commands. Useful in particular for the
> average latency calculation.
> 
> The average_write() callback was unreachable, as "average" is a
> read-only file. Extend, rename,  and use it for a newly exposed
> write-only "reset" file.
> 
> Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
> Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
> Reviewed-by: Gal Pressman <gal@nvidia.com>

Reviewed-by: Simon Horman <horms@kernel.org>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
index 09652dc89115..36806e813c33 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
@@ -143,8 +143,8 @@  static ssize_t average_read(struct file *filp, char __user *buf, size_t count,
 	return simple_read_from_buffer(buf, count, pos, tbuf, ret);
 }
 
-static ssize_t average_write(struct file *filp, const char __user *buf,
-			     size_t count, loff_t *pos)
+static ssize_t reset_write(struct file *filp, const char __user *buf,
+			   size_t count, loff_t *pos)
 {
 	struct mlx5_cmd_stats *stats;
 
@@ -152,6 +152,11 @@  static ssize_t average_write(struct file *filp, const char __user *buf,
 	spin_lock_irq(&stats->lock);
 	stats->sum = 0;
 	stats->n = 0;
+	stats->failed = 0;
+	stats->failed_mbox_status = 0;
+	stats->last_failed_errno = 0;
+	stats->last_failed_mbox_status = 0;
+	stats->last_failed_syndrome = 0;
 	spin_unlock_irq(&stats->lock);
 
 	*pos += count;
@@ -159,11 +164,16 @@  static ssize_t average_write(struct file *filp, const char __user *buf,
 	return count;
 }
 
-static const struct file_operations stats_fops = {
+static const struct file_operations reset_fops = {
+	.owner	= THIS_MODULE,
+	.open	= simple_open,
+	.write	= reset_write,
+};
+
+static const struct file_operations average_fops = {
 	.owner	= THIS_MODULE,
 	.open	= simple_open,
 	.read	= average_read,
-	.write	= average_write,
 };
 
 static ssize_t slots_read(struct file *filp, char __user *buf, size_t count,
@@ -228,8 +238,10 @@  void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
 				continue;
 			stats->root = debugfs_create_dir(namep, *cmd);
 
+			debugfs_create_file("reset", 0200, stats->root, stats,
+					    &reset_fops);
 			debugfs_create_file("average", 0400, stats->root, stats,
-					    &stats_fops);
+					    &average_fops);
 			debugfs_create_u64("n", 0400, stats->root, &stats->n);
 			debugfs_create_u64("failed", 0400, stats->root, &stats->failed);
 			debugfs_create_u64("failed_mbox_status", 0400, stats->root,