table of contents
| mlx5dv_devx_alloc_msi_vector(3) | mlx5 Programmer's Manual | mlx5dv_devx_alloc_msi_vector(3) |
NAME¶
mlx5dv_devx_alloc_msi_vector - Allocate an msi vector to be used for creating an EQ.
mlx5dv_devx_free_msi_vector - Release an msi vector.
SYNOPSIS¶
-
#include <infiniband/mlx5dv.h> struct mlx5dv_devx_msi_vector * mlx5dv_devx_alloc_msi_vector(struct ibv_context *ibctx); int mlx5dv_devx_free_msi_vector(struct mlx5dv_devx_msi_vector *msi);
DESCRIPTION¶
Allocate or free an msi vector to be used for creating an EQ.
The allocate API exposes a mlx5dv_devx_msi_vector object, which includes an msi vector and a fd. The vector can be used as the “eqc.intr” field when creating an EQ, while the fd (created as non-blocking) can be polled to see once there is some data on that EQ.
ARGUMENTS¶
- ibctx
- RDMA device context to create the action on.
- msi
- The msi vector object to work on.
msi_vector¶
-
struct mlx5dv_devx_msi_vector { int vector; int fd; };
- vector
- The vector to be used when creating the EQ over the device specification.
- fd
- The FD that will be used for polling.
RETURN VALUE¶
Upon success mlx5dv_devx_alloc_msi_vector will return a new struct mlx5dv_devx_msi_vector; On error NULL will be returned and errno will be set.
Upon success mlx5dv_devx_free_msi_vector will return 0, on error errno will be returned.
AUTHOR¶
Mark Zhang <markzhang@nvidia.com>
| 2022-01-12 | mlx5 |