[dpdk-dev] [RFC v3 4/8] common/mlx5: create GENEVE TLV option object with DevX

[Shiri Kuzin <shirik@nvidia.com>]

TLV object is a special firmware maintained entity used
to support match on GENEVE header extension option.

The TLV object is created with DevX API and accepts
the option class, type and lehgth fields.

The class type and length fields are set using MLX5_SET
and the Devx object is created using mlx5 glue function.

Signed-off-by: Shiri Kuzin <shirik@nvidia.com>
---
 drivers/common/mlx5/mlx5_devx_cmds.c | 54 ++++++++++++++++++++++++++++++++++++
 drivers/common/mlx5/mlx5_devx_cmds.h |  5 ++++
 drivers/common/mlx5/version.map      |  1 +
 3 files changed, 60 insertions(+)

diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
index a6d052d..b5808a9 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -2051,3 +2051,57 @@ struct mlx5_devx_obj *
 	flow_hit_aso_obj->id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
 	return flow_hit_aso_obj;
 }
+
+/**
+ * Create general object of type GENEVE TLV option using DevX API.
+ *
+ * @param[in] ctx
+ *   Context returned from mlx5 open_device() glue function.
+ * @param [in] class
+ *   TLV option variable value of class
+ * @param [in] type
+ *   TLV option variable value of type
+ * @param [in] len
+ *   TLV option variable value of len
+ *
+ * @return
+ *   The DevX object created, NULL otherwise and rte_errno is set.
+ */
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_geneve_tlv_option(void *ctx,
+		uint16_t class, uint8_t type, uint8_t len)
+{
+	uint32_t in[MLX5_ST_SZ_DW(create_geneve_tlv_option_in)] = {0};
+	uint32_t out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
+	struct mlx5_devx_obj *geneve_tlv_opt_obj = mlx5_malloc(MLX5_MEM_ZERO,
+						   sizeof(*geneve_tlv_opt_obj),
+						   0, SOCKET_ID_ANY);
+
+	if (!geneve_tlv_opt_obj) {
+		DRV_LOG(ERR, "Failed to allocate geneve tlv option object.");
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+	void *hdr = MLX5_ADDR_OF(create_geneve_tlv_option_in, in, hdr);
+	void *opt = MLX5_ADDR_OF(create_geneve_tlv_option_in, in,
+			geneve_tlv_opt);
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, opcode,
+			MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_type,
+			MLX5_OBJ_TYPE_GENEVE_TLV_OPT);
+	MLX5_SET(geneve_tlv_option, opt, option_class,
+			rte_be_to_cpu_16(class));
+	MLX5_SET(geneve_tlv_option, opt, option_type, type);
+	MLX5_SET(geneve_tlv_option, opt, option_data_length, len);
+	geneve_tlv_opt_obj->obj = mlx5_glue->devx_obj_create(ctx, in,
+					sizeof(in), out, sizeof(out));
+	if (!geneve_tlv_opt_obj->obj) {
+		rte_errno = errno;
+		DRV_LOG(ERR, "Failed to create Geneve tlv option "
+				"Obj using DevX.");
+		mlx5_free(geneve_tlv_opt_obj);
+		return NULL;
+	}
+	geneve_tlv_opt_obj->id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
+	return geneve_tlv_opt_obj;
+}
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index 58e619f..73c1dfd 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -473,6 +473,11 @@ struct mlx5_devx_obj *mlx5_devx_cmd_create_flex_parser(void *ctx,
 int mlx5_devx_cmd_register_read(void *ctx, uint16_t reg_id,
 				uint32_t arg, uint32_t *data, uint32_t dw_cnt);
 
+__rte_internal
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_geneve_tlv_option(void *ctx,
+		uint16_t class, uint8_t type, uint8_t len);
+
 /**
  * Create virtio queue counters object DevX API.
  *
diff --git a/drivers/common/mlx5/version.map b/drivers/common/mlx5/version.map
index 17dd11f..3c403d2 100644
--- a/drivers/common/mlx5/version.map
+++ b/drivers/common/mlx5/version.map
@@ -22,6 +22,7 @@ INTERNAL {
 	mlx5_devx_cmd_create_virtio_q_counters;
 	mlx5_devx_cmd_create_virtq;
         mlx5_devx_cmd_create_flow_hit_aso_obj;
+	mlx5_devx_cmd_create_geneve_tlv_option;
 	mlx5_devx_cmd_destroy;
 	mlx5_devx_cmd_flow_counter_alloc;
 	mlx5_devx_cmd_flow_counter_query;
-- 
1.8.3.1