| mlx5dv_alloc_dm(3) | mlx5 Programmer’s Manual | mlx5dv_alloc_dm(3) |
mlx5dv_alloc_dm - allocates device memory (DM)
#include <infiniband/mlx5dv.h> struct ibv_dm *mlx5dv_alloc_dm(struct ibv_context *context,
struct ibv_alloc_dm_attr *dm_attr,
struct mlx5dv_alloc_dm_attr *mlx5_dm_attr)
mlx5dv_alloc_dm() allocates device memory (DM) with specific driver properties.
Please see ibv_alloc_dm(3) man page for context and dm_attr.
struct mlx5dv_alloc_dm_attr {
enum mlx5dv_alloc_dm_type type;
uint64_t comp_mask;
};
MLX5DV_DM_TYPE_MEMIC Device memory of type MEMIC - On-Chip memory that can be allocated and used as memory region for transmitting/receiving packet directly from/to the memory on the chip.
MLX5DV_DM_TYPE_STEERING_SW_ICM Device memory of type STEERING SW ICM - This memory is used by the device to store the packet steering tables and rules. Can be used for direct table and steering rules creation when allocated by a privileged user.
MLX5DV_DM_TYPE_HEADER_MODIFY_SW_ICM Device memory of type HEADER MODIFY SW ICM - This memory is used by the device to store the packet header modification tables and rules. Can be used for direct table and header modification rules creation when allocated by a privileged user.
MLX5DV_DM_TYPE_HEADER_MODIFY_PATTERN_SW_ICM Device memory of type HEADER MODIFY PATTERN SW ICM - This memory is used by the device to store packet header modification patterns/templates. Can be used for direct table and header modification rules creation when allocated by a privileged user.
mlx5dv_alloc_dm() returns a pointer to the created DM, on error NULL will be returned and errno will be set.
Ariel Levkovich <lariel@mellanox.com>
| 2018-9-1 | mlx5 |