---
name: "rte_dma_info"
section: "3"
platform: "linux"
package: "dpdk-doc"
version: "24.11.4-0+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/rte_dma_info"
---

# rte\_dma\_info(3)

## NAME

rte\_dma\_info

## SYNOPSIS

`#include <rte_dmadev.h>`

### Data Fields

const char \* **dev\_name**\
 uint64\_t **dev\_capa**\
 uint16\_t **max\_vchans**\
 uint16\_t **max\_desc**\
 uint16\_t **min\_desc**\
 uint16\_t **max\_sges**\
 int16\_t **numa\_node**\
 uint16\_t **nb\_vchans**\
 uint16\_t **nb\_priorities**\

## Detailed Description

A structure used to retrieve the information of a DMA device.

**See also**

**rte\_dma\_info\_get**

Definition at line **286** of file **rte\_dmadev.h**.

## Field Documentation

### const char\* dev\_name

Unique device name.

Definition at line **287** of file **rte\_dmadev.h**.

### uint64\_t dev\_capa

Device capabilities (RTE\_DMA\_CAPA\_\*).

Definition at line **289** of file **rte\_dmadev.h**.

### uint16\_t max\_vchans

Maximum number of virtual DMA channels supported.

Definition at line **291** of file **rte\_dmadev.h**.

### uint16\_t max\_desc

Maximum allowed number of virtual DMA channel descriptors.

Definition at line **293** of file **rte\_dmadev.h**.

### uint16\_t min\_desc

Minimum allowed number of virtual DMA channel descriptors.

Definition at line **295** of file **rte\_dmadev.h**.

### uint16\_t max\_sges

Maximum number of source or destination scatter-gather entry supported. If the device does not support COPY\_SG capability, this value can be zero. If the device supports COPY\_SG capability, then **rte\_dma\_copy\_sg()** parameter nb\_src/nb\_dst should not exceed this value.

Definition at line **303** of file **rte\_dmadev.h**.

### int16\_t numa\_node

NUMA node connection, -1 if unknown.

Definition at line **305** of file **rte\_dmadev.h**.

### uint16\_t nb\_vchans

Number of virtual DMA channel configured.

Definition at line **307** of file **rte\_dmadev.h**.

### uint16\_t nb\_priorities

Number of priority levels (must be \> 1) if priority scheduling is supported, 0 otherwise.

Definition at line **311** of file **rte\_dmadev.h**.

## Author

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