ibv_query_device
Queries the attributes of an RDMA device.
Syntax
#include <rdma/verbs.h>
int ibv_query_device(struct ibv_context *context, struct ibv_device_attr *device_attr)Description
The ibv_query_device() function returns the attributes of the device with context context. The parameter device_attr is a pointer to an ibv_device_attr struct as defined in the <rdma/verbs.h> file.
Note: The maximum values that are returned by the ibv_query_device() function
are the upper limits of the supported resources by the device. It
is not possible to use these maximum values because the actual number
of any resource that can be created is limited by the system configuration,
the amount of host memory, user permissions, and the amount of resources
in use.
Input Parameter
| Item | Description |
|---|---|
| context | Specifies the struct ibv_context from
the ibv_open_device function. |
Output Parameter
| Item | Description |
|---|---|
| device_attr | Specifies the struct ibv_device_attr that contains the device attributes. |
Return Values
| Item | Description |
|---|---|
| 0 | On success. |
| errno | On failure. |