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Mon, 3 Aug 2026 06:25:57 -0700 From: Tariq Toukan To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , , Paolo Abeni CC: Dragos Tatulea , Gal Pressman , "Leon Romanovsky" , , , Mark Bloch , Nimrod Oren , Saeed Mahameed , Tariq Toukan Subject: [PATCH net-next V2 3/3] net/mlx5: add debugfs stats for doorbell dma pools Date: Mon, 3 Aug 2026 16:25:20 +0300 Message-ID: <20260803132520.2891860-4-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260803132520.2891860-1-tariqt@nvidia.com> References: <20260803132520.2891860-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00026369:EE_|SAWPR12MB999316:EE_ X-MS-Office365-Filtering-Correlation-Id: 76e3c541-8a80-4068-b6bb-08def162cf23 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|23010399003|376014|1800799024|82310400026|10067099003|11063799006|56012099006|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 2Q3PtTKab4aM9/9uOMGL9ky3iaV/g35rk8bv1DQqx16tNU6t3qNYZ+sA9qhfpcwGNni302nY1m24PmN1huJqXZVHLHLvg7LWNh9leP0kyDSfGTRzp0NotgWLrFmQoC+Yu9EhPAa10G1eB+yg3UXBqCumwST7ffa/GxBerNolNIiT5YsBP1Ei2FuDHOn0k8iyS9D7QPLJeLZKfU1SVsWR18OV8YuHNIgaJ/AgSWSeL5q7ykHo7+OmSm/E1kGKXhCrYvcu/Cl9auZzUtUaU3qMzkt7vuOLIUvRZGFn9nh5R0bYQGNWyGsPPk1EfeeHsIAcmNARW9PQJqm0l85vZbjmOdsFtVjDtYvFVjpO/bmUFr4j4pCg6yFuqXul3kkOjjxU8qzq1lHAdjIYQbL2BNKHOb94YV+HzkniMvbF+KkqsWHm5OzLadWTi17HmSrbeNB7 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Aug 2026 13:26:21.6257 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 76e3c541-8a80-4068-b6bb-08def162cf23 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF00026369.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SAWPR12MB999316 From: Nimrod Oren Add a debugfs file exposing per-node DMA pool usage for doorbell allocations. # cat /sys/kernel/debug/mlx5//db_dma_pools node block_size used_blocks allocated_blocks 0 64 0 0 1 64 0 0 Signed-off-by: Nimrod Oren Signed-off-by: Tariq Toukan --- .../net/ethernet/mellanox/mlx5/core/alloc.c | 27 +++++++++++++++++++ include/linux/mlx5/driver.h | 1 + 2 files changed, 28 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c index 3975c726d35c..a92cf545bdaf 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c @@ -437,11 +437,34 @@ void mlx5_frag_buf_free(struct mlx5_core_dev *dev, struct mlx5_frag_buf *buf) } EXPORT_SYMBOL_GPL(mlx5_frag_buf_free); +static int mlx5_db_dma_pools_debugfs_show(struct seq_file *file, void *priv) +{ + struct mlx5_core_dev *dev = file->private; + int node; + + mlx5_dma_pools_debugfs_print_header(file); + + for_each_node_state(node, N_POSSIBLE) { + struct mlx5_dma_pool *pool = dev->priv.db_node_pools[node]; + + if (!pool) + continue; + + mlx5_dma_pool_debugfs_stats_print(file, pool); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(mlx5_db_dma_pools_debugfs); + void mlx5_db_pools_cleanup(struct mlx5_core_dev *dev) { struct mlx5_priv *priv = &dev->priv; int node; + debugfs_remove(priv->dbg.db_dma_pools_debugfs); + priv->dbg.db_dma_pools_debugfs = NULL; + for_each_node_state(node, N_POSSIBLE) if (priv->db_node_pools[node]) mlx5_dma_pool_destroy(priv->db_node_pools[node]); @@ -471,6 +494,10 @@ int mlx5_db_pools_init(struct mlx5_core_dev *dev) priv->db_node_pools[node] = pool; } + priv->dbg.db_dma_pools_debugfs = + debugfs_create_file("db_dma_pools", 0444, priv->dbg.dbg_root, + dev, &mlx5_db_dma_pools_debugfs_fops); + return 0; } diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 2c56bb1d676d..83d0a83bbfbc 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -548,6 +548,7 @@ struct mlx5_debugfs_entries { struct dentry *cq_debugfs; struct dentry *cmdif_debugfs; struct dentry *frag_buf_dma_pools_debugfs; + struct dentry *db_dma_pools_debugfs; struct dentry *pages_debugfs; struct dentry *lag_debugfs; }; -- 2.44.0