netdev - [PATCH net-next 7/7] net/mlx5: {DR,HWS}, Use the cached vhca

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Message-ID: <20250821215839.280364-8-saeed@kernel.org>
Date: Thu, 21 Aug 2025 14:58:39 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>,
	netdev@...r.kernel.org,
	Tariq Toukan <tariqt@...dia.com>,
	Gal Pressman <gal@...dia.com>,
	Leon Romanovsky <leonro@...dia.com>,
	Parav Pandit <parav@...dia.com>,
	Mark Bloch <mbloch@...dia.com>,
	Adithya Jayachandran <ajayachandra@...dia.com>
Subject: [PATCH net-next 7/7] net/mlx5: {DR,HWS}, Use the cached vhca_id for this device

From: Saeed Mahameed <saeedm@...dia.com>

The mlx5 driver caches many capabilities to be used by mlx5 layers.

In SW and HW steering we can use the cached vhca_id instead of invoking
FW commands.

Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../mellanox/mlx5/core/steering/hws/cmd.c     | 34 ++++---------------
 .../mellanox/mlx5/core/steering/sws/dr_cmd.c  | 34 ++++---------------
 2 files changed, 14 insertions(+), 54 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/cmd.c
index acb0317f930b..f22eaf506d28 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/cmd.c
@@ -1200,40 +1200,20 @@ int mlx5hws_cmd_query_caps(struct mlx5_core_dev *mdev,
 int mlx5hws_cmd_query_gvmi(struct mlx5_core_dev *mdev, bool other_function,
 			   u16 vport_number, u16 *gvmi)
 {
-	u32 in[MLX5_ST_SZ_DW(query_hca_cap_in)] = {};
-	int out_size;
-	void *out;
 	int err;
 
-	if (other_function) {
-		err = mlx5_vport_get_vhca_id(mdev, vport_number, gvmi);
-		if  (!err)
-			return 0;
-
-		mlx5_core_err(mdev, "Failed to get vport vhca id for vport %d\n",
-			      vport_number);
-		return err;
+	if (!other_function) {
+		/* self vhca_id */
+		*gvmi = MLX5_CAP_GEN(mdev, vhca_id);
+		return 0;
 	}
 
-	/* get vhca_id for `this` function */
-	out_size = MLX5_ST_SZ_BYTES(query_hca_cap_out);
-	out = kzalloc(out_size, GFP_KERNEL);
-	if (!out)
-		return -ENOMEM;
-
-	MLX5_SET(query_hca_cap_in, in, opcode, MLX5_CMD_OP_QUERY_HCA_CAP);
-	MLX5_SET(query_hca_cap_in, in, op_mod,
-		 MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1 | HCA_CAP_OPMOD_GET_CUR);
-
-	err = mlx5_cmd_exec_inout(mdev, query_hca_cap, in, out);
+	err = mlx5_vport_get_vhca_id(mdev, vport_number, gvmi);
 	if (err) {
-		kfree(out);
+		mlx5_core_err(mdev, "Failed to get vport vhca id for vport %d\n",
+			      vport_number);
 		return err;
 	}
 
-	*gvmi = MLX5_GET(query_hca_cap_out, out, capability.cmd_hca_cap.vhca_id);
-
-	kfree(out);
-
 	return 0;
 }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_cmd.c
index bf99b933fd14..1ebb2b15c080 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_cmd.c
@@ -35,41 +35,21 @@ int mlx5dr_cmd_query_esw_vport_context(struct mlx5_core_dev *mdev,
 int mlx5dr_cmd_query_gvmi(struct mlx5_core_dev *mdev, bool other_vport,
 			  u16 vport_number, u16 *gvmi)
 {
-	u32 in[MLX5_ST_SZ_DW(query_hca_cap_in)] = {};
-	int out_size;
-	void *out;
 	int err;
 
-	if (other_vport) {
-		err = mlx5_vport_get_vhca_id(mdev, vport_number, gvmi);
-		if  (!err)
-			return 0;
-
-		mlx5_core_err(mdev, "Failed to get vport vhca id for vport %d\n",
-			      vport_number);
-		return err;
+	if (!other_vport) {
+		/* self vhca_id */
+		*gvmi = MLX5_CAP_GEN(mdev, vhca_id);
+		return 0;
 	}
 
-	/* get vhca_id for `this` function */
-	out_size = MLX5_ST_SZ_BYTES(query_hca_cap_out);
-	out = kzalloc(out_size, GFP_KERNEL);
-	if (!out)
-		return -ENOMEM;
-
-	MLX5_SET(query_hca_cap_in, in, opcode, MLX5_CMD_OP_QUERY_HCA_CAP);
-	MLX5_SET(query_hca_cap_in, in, op_mod,
-		 MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE << 1 |
-		 HCA_CAP_OPMOD_GET_CUR);
-
-	err = mlx5_cmd_exec_inout(mdev, query_hca_cap, in, out);
+	err = mlx5_vport_get_vhca_id(mdev, vport_number, gvmi);
 	if (err) {
-		kfree(out);
+		mlx5_core_err(mdev, "Failed to get vport vhca id for vport %d\n",
+			      vport_number);
 		return err;
 	}
 
-	*gvmi = MLX5_GET(query_hca_cap_out, out, capability.cmd_hca_cap.vhca_id);
-
-	kfree(out);
 	return 0;
 }
 
-- 
2.50.1