Multi Channel DMA Intel® FPGA IP for PCI Express* User Guide

ID 683821
Date 1/29/2024
Document Table of Contents ifc_qdma_descq_queue_batch_load

Table 110.  ifc_qdma_descq_queue_batch_load
API API Description Input Parameters Return Values
int ifc_qdma_descq_queue_batch_load(struct ifc_qdma_channel *qchnl, void *req_buf, int dir, int n)

Depending on the direction, application selects the queue and prepare n numbr of descriptors but not submit the transactions. Application must use ifc_qdma_request_submit API to submit the transactions to DMA engine.

qchnl: channel context received on ifc_qchannel_get()

dir: DMA direction, one of IFC_QDMA_DIRECTION_*

r: request struct that needs to be processed

Returns the number of transactions completed.

negative otherwise