rte_vhost_async_channel_ops Struct Reference

#include <rte_vhost_async.h>

Data Fields
int32_t(*	transfer_data )(int vid, uint16_t queue_id, struct rte_vhost_async_desc *descs, struct rte_vhost_async_status *opaque_data, uint16_t count)
int32_t(*	check_completed_copies )(int vid, uint16_t queue_id, struct rte_vhost_async_status *opaque_data, uint16_t max_packets)

Detailed Description

dma operation callbacks to be implemented by applications

Examples:

examples/vhost/main.c.

Definition at line 47 of file rte_vhost_async.h.

Field Documentation

transfer_data

int32_t(* transfer_data) (int vid, uint16_t queue_id, struct rte_vhost_async_desc *descs, struct rte_vhost_async_status *opaque_data, uint16_t count)

instruct async engines to perform copies for a batch of packets

Parameters

vid	id of vhost device to perform data copies
queue_id	queue id to perform data copies
descs	an array of DMA transfer memory descriptors
opaque_data	opaque data pair sending to DMA engine
count	number of elements in the "descs" array

Returns

number of descs processed, negative value means error

Examples:

examples/vhost/main.c.

Definition at line 64 of file rte_vhost_async.h.

check_completed_copies

int32_t(* check_completed_copies) (int vid, uint16_t queue_id, struct rte_vhost_async_status *opaque_data, uint16_t max_packets)

check copy-completed packets from the async engine

Parameters

vid	id of vhost device to check copy completion
queue_id	queue id to check copy completion
opaque_data	buffer to receive the opaque data pair from DMA engine
max_packets	max number of packets could be completed

Returns

number of async descs completed, negative value means error

Examples:

examples/vhost/main.c.

Definition at line 81 of file rte_vhost_async.h.

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The documentation for this struct was generated from the following file:

• lib/vhost/rte_vhost_async.h