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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¶
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#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¶
msi_vector¶
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struct mlx5dv_devx_msi_vector {
int vector;
int fd; };
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 |