---
name: "rio_request_dma"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/rio_request_dma"
---

# rio\_request\_dma(9)

request RapidIO capable DMA channel that supports specified target RapidIO device.

## NAME

rio\_request\_dma - request RapidIO capable DMA channel that supports specified target RapidIO device.

## SYNOPSIS

**struct dma\_chan \* rio\_request\_dma(struct rio\_dev \*** *rdev***);**

## ARGUMENTS

*rdev*

RIO device associated with DMA transfer

## DESCRIPTION

Returns pointer to allocated DMA channel or NULL if failed.

## AUTHOR

**Matt Porter** \<mporter@kernel.crashing.org\>, \<mporter@mvista.com\>

Author.

## COPYRIGHT