mlx5dv_alloc_dm(3) mlx5 Programmer’s Manual mlx5dv_alloc_dm(3)
NAME
mlx5dv_alloc_dm - allocates device memory (DM)
SYNOPSIS
#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)
DESCRIPTION
mlx5dv_alloc_dm() allocates device memory (DM) with specific driver
properties.
ARGUMENTS
Please see ibv_alloc_dm(3) man page for context and dm_attr.
mlx5_dm_attr
struct mlx5dv_alloc_dm_attr {
enum mlx5dv_alloc_dm_type type;
uint64_t comp_mask;
};
type The device memory type user wishes to allocate:
MLX5DV_DM_TYPE_MEMIC Device memory of type MEMIC - On-Chip memo-
ry that can be allocated and used as memory region for transmit-
ting/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 allo-
cated by a privileged user.
comp_mask
Bitmask specifying what fields in the structure are valid: Cur-
rently reserved and should be set to 0.
RETURN VALUE
mlx5dv_alloc_dm() returns a pointer to the created DM, on error NULL
will be returned and errno will be set.
SEE ALSO
ibv_alloc_dm(3),
AUTHOR
Ariel Levkovich <lariel@mellanox.com>
mlx5 2018-9-1 mlx5dv_alloc_dm(3)
Generated by dwww version 1.14 on Fri Jan 24 06:15:47 CET 2025.