Linux QDMA Software Architecture (PF/VF) - 3.3 English

Versal ACAP CPM DMA and Bridge Mode for PCI Express Product Guide (PG347)

Document ID
PG347
Release Date
2022-11-02
Version
3.3 English
Figure 1. Linux DMA Software Architecture

The QDMA driver consists of the following three major components:

  • Device control tool: Creates a netlink socket for PCIe device query, queue management, reading the context of a queue, etc.
  • DMA tool: Is the user space application to initiate a DMA transaction. You can use standard Linux utility dd or fio, or use the example application in the driver package.
  • Kernel space driver: Creates the descriptors and translates the user space function into low-level command to interact with the Versal ACAP.