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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON |
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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.
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
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_DM_TYPE_ENCAP_SW_ICM Device memory of type PACKET
ENCAP SW ICM - This memory is used by the device to store
packet encap data. Can be used for packet encap reformat
rules creation when allocated by a privileged user.
comp_mask
Bitmask specifying what fields in the structure are valid:
Currently reserved and should be set to 0.
mlx5dv_alloc_dm() returns a pointer to the created DM, on error
NULL will be returned and errno will be set.
ibv_alloc_dm(3),
Ariel Levkovich ⟨lariel@mellanox.com⟩
This page is part of the rdma-core (RDMA Core Userspace Libraries
and Daemons) project. Information about the project can be found
at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug
report for this manual page, send it to
linux-rdma@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11. (At
that time, the date of the most recent commit that was found in
the repository was 2025-08-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
mlx5 2018-9-1 mlx5dv_alloc_dm(3)
Pages that refer to this page: mlx5dv_dm_map_op_addr(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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