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

ID 683821
Date 8/19/2022
Public

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3.1.6.1. Avalon-ST 1-Port Mode

When you select AVST 1 port mode, the IP provides 1 AVST Source and Sink port for DMA. In this mode, you can enable up to 2K DMA channels.

Table 19.  IP Parameters specific to D2H Descriptor Fetch in Avalon-ST 1 Port Mode
IP GUI Parameter Description Value for MCDMA
D2H Prefetch Channels Number of prefetch channels 8, 16, 32, 64, 128, 256
Maximum Descriptor Fetch Number of descriptors that can be fetched for each prefetch channels 16, 32, 64
Note: In the current Intel® Quartus® Prime release, the D2H Prefetch Channels follows the total number of DMA channels that you select up to 256 total channels. When the total number of channels selected is greater than 256, then D2H Prefetch channels are fixed to 64. The resource utilization shall increase with the number of D2H prefetch channels.

For details about these parameters, refer to the D2H Data Mover section.

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