net/mlx5: Implement alias object allow and create functions

Add functions which allow one vhca to access another vhca object,
and functions that creates an alias object or destroys it.

Together they can be used to create cross vhca flow table that is able
jump from the steering domain that is managed by one vport,
to the steering domain on a different vport.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://lore.kernel.org/r/f45a9c85319fa783186b8988abcd64955b5f2a0c.1695296682.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: PatrisiousHaddad

drivers/net/ethernet/mellanox/mlx5/core/cmd.c

@@ -525,6 +525,7 @@ static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
 	case MLX5_CMD_OP_SAVE_VHCA_STATE:
 	case MLX5_CMD_OP_LOAD_VHCA_STATE:
 	case MLX5_CMD_OP_SYNC_CRYPTO:
+	case MLX5_CMD_OP_ALLOW_OTHER_VHCA_ACCESS:
 		*status = MLX5_DRIVER_STATUS_ABORTED;
 		*synd = MLX5_DRIVER_SYND;
 		return -ENOLINK;
@@ -728,6 +729,7 @@ const char *mlx5_command_str(int command)
 	MLX5_COMMAND_STR_CASE(SAVE_VHCA_STATE);
 	MLX5_COMMAND_STR_CASE(LOAD_VHCA_STATE);
 	MLX5_COMMAND_STR_CASE(SYNC_CRYPTO);
+	MLX5_COMMAND_STR_CASE(ALLOW_OTHER_VHCA_ACCESS);
 	default: return "unknown command opcode";
 	}
 }
@@ -2090,6 +2092,74 @@ int mlx5_cmd_exec_cb(struct mlx5_async_ctx *ctx, void *in, int in_size,
 }
 EXPORT_SYMBOL(mlx5_cmd_exec_cb);
 
+int mlx5_cmd_allow_other_vhca_access(struct mlx5_core_dev *dev,
+				     struct mlx5_cmd_allow_other_vhca_access_attr *attr)
+{
+	u32 out[MLX5_ST_SZ_DW(allow_other_vhca_access_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(allow_other_vhca_access_in)] = {};
+	void *key;
+
+	MLX5_SET(allow_other_vhca_access_in,
+		 in, opcode, MLX5_CMD_OP_ALLOW_OTHER_VHCA_ACCESS);
+	MLX5_SET(allow_other_vhca_access_in,
+		 in, object_type_to_be_accessed, attr->obj_type);
+	MLX5_SET(allow_other_vhca_access_in,
+		 in, object_id_to_be_accessed, attr->obj_id);
+
+	key = MLX5_ADDR_OF(allow_other_vhca_access_in, in, access_key);
+	memcpy(key, attr->access_key, sizeof(attr->access_key));
+
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+int mlx5_cmd_alias_obj_create(struct mlx5_core_dev *dev,
+			      struct mlx5_cmd_alias_obj_create_attr *alias_attr,
+			      u32 *obj_id)
+{
+	u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
+	u32 in[MLX5_ST_SZ_DW(create_alias_obj_in)] = {};
+	void *param;
+	void *attr;
+	void *key;
+	int ret;
+
+	attr = MLX5_ADDR_OF(create_alias_obj_in, in, hdr);
+	MLX5_SET(general_obj_in_cmd_hdr,
+		 attr, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
+	MLX5_SET(general_obj_in_cmd_hdr,
+		 attr, obj_type, alias_attr->obj_type);
+	param = MLX5_ADDR_OF(general_obj_in_cmd_hdr, in, op_param);
+	MLX5_SET(general_obj_create_param, param, alias_object, 1);
+
+	attr = MLX5_ADDR_OF(create_alias_obj_in, in, alias_ctx);
+	MLX5_SET(alias_context, attr, vhca_id_to_be_accessed, alias_attr->vhca_id);
+	MLX5_SET(alias_context, attr, object_id_to_be_accessed, alias_attr->obj_id);
+
+	key = MLX5_ADDR_OF(alias_context, attr, access_key);
+	memcpy(key, alias_attr->access_key, sizeof(alias_attr->access_key));
+
+	ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (ret)
+		return ret;
+
+	*obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
+
+	return 0;
+}
+
+int mlx5_cmd_alias_obj_destroy(struct mlx5_core_dev *dev, u32 obj_id,
+			       u16 obj_type)
+{
+	u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
+	u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {};
+
+	MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
+	MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, obj_type);
+	MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, obj_id);
+
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
 static void destroy_msg_cache(struct mlx5_core_dev *dev)
 {
 	struct cmd_msg_cache *ch;

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

@@ -97,6 +97,22 @@ do {								\
 			     __func__, __LINE__, current->pid,	\
 			     ##__VA_ARGS__)
 
+#define ACCESS_KEY_LEN  32
+#define FT_ID_FT_TYPE_OFFSET 24
+
+struct mlx5_cmd_allow_other_vhca_access_attr {
+	u16 obj_type;
+	u32 obj_id;
+	u8 access_key[ACCESS_KEY_LEN];
+};
+
+struct mlx5_cmd_alias_obj_create_attr {
+	u32 obj_id;
+	u16 vhca_id;
+	u16 obj_type;
+	u8 access_key[ACCESS_KEY_LEN];
+};
+
 static inline void mlx5_printk(struct mlx5_core_dev *dev, int level, const char *format, ...)
 {
 	struct device *device = dev->device;
@@ -343,6 +359,12 @@ bool mlx5_eth_supported(struct mlx5_core_dev *dev);
 bool mlx5_rdma_supported(struct mlx5_core_dev *dev);
 bool mlx5_vnet_supported(struct mlx5_core_dev *dev);
 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev);
+int mlx5_cmd_allow_other_vhca_access(struct mlx5_core_dev *dev,
+				     struct mlx5_cmd_allow_other_vhca_access_attr *attr);
+int mlx5_cmd_alias_obj_create(struct mlx5_core_dev *dev,
+			      struct mlx5_cmd_alias_obj_create_attr *alias_attr,
+			      u32 *obj_id);
+int mlx5_cmd_alias_obj_destroy(struct mlx5_core_dev *dev, u32 obj_id, u16 obj_type);
 
 static inline u16 mlx5_core_ec_vf_vport_base(const struct mlx5_core_dev *dev)
 {