mlx5dv_devx_qp_modify3

Overview

Modify / query a verb object over the DEVX interface.

The DEVX API enables direct access from the user space area to the mlx5 device driver by using the KABI mechanism. The main purpose is to make the user space driver as independent as possible from the kernel so that future device functionality and commands can be activated with minimal to none kernel changes.

The above APIs enables modifying/querying a verb object via the DEVX interface. This enables interoperability between verbs and DEVX. As such an application can use the create method from verbs (e.g. ibv_create_qp) and modify and query the created object via DEVX (e.g. mlx5dv_devx_qp_modify).

Arguments

qp/cq/wq/srq/ind_tbl

The ibv_xxx object to issue the action on.

in

A buffer which contains the command’s input data provided in a device specification format.

inlen

The size of in buffer in bytes.

out

A buffer which contains the command’s output data according to the device specification format.

outlen

The size of out buffer in bytes.

Return value

Upon success 0 is returned or the value of errno on a failure.

If the error value is EREMOTEIO, outbox.status outbox.syndrome will contain the command failure details.