DMA (Direct Memory Access) equipment based on FPGA (Field Programmable Gate Array) and DMA data migration method

Abstract

The invention discloses DMA equipment based on an FPGA and a DMA data migration method. The DMA equipment comprises: a configuration module which is used for obtaining configuration information sent by a host, and transmitting data migration tasks to a plurality of data migration channels in a multi-channel module based on the configuration information, wherein the configuration information comprises a to-be-moved data volume, a source address and a destination address of each channel; a multi-channel module which is used for sending a migration request to a arbitration module through each data migration channel based on a corresponding migration task; and the arbitration module is used for determining a first target request from the plurality of migration requests based on a preset channel priority, and processing the first target request to migrate target data in a first storage device to a second storage device through a corresponding data migration channel, and determining a second target request for processing based on the preset channel priority when the data volume in the first storage device is insufficient. The data migration requirement among multiple external storage devices can be met, and the data migration efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of data transmission, in particular to an FPGA-based DMA device and a DMA data transfer method. Background technique [0002] With the increasingly widespread application of heterogeneous acceleration, accelerator cards based on FPGA (ie Field Programmable Gate Array) are also developing rapidly. The accelerator card FPGA is connected to the server host through the PCIE interface, and the server host sends the data to be accelerated to the accelerator card FPGA through the PCIE (peripheral component interconnect express, a high-speed serial computer expansion bus standard) interface. After the accelerator card FPGA processing is completed Return relevant data through the PCIE interface. In the process of data transmission, DMA (direct memory access, direct memory access) is a commonly used data transfer device, which is used to receive transfer instructions from the host, apply for bus control, an...

AI Technical Summary

Problems solved by technology

[0003] At present, if there are many peripherals in the system, the existing DMA can only receive one move command at a time, then multiple DMAs need to work simultaneously to meet the requirements, and this will obviously increase the complexity of the system

And because they are all hung on the same bus, multiple DMAs cannot move data at the same time, and only one DMA can acquire the bus at the same time to move data

In this way, the bus needs to switch between multiple DMAs, which is less efficient

Images