linux-kernel - Use DMA Test Kernel Module for FPGA Device

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Message-ID: <3955779b6d28751c45ab5af01095ef88@sw-optimization.com>
Date:   Thu, 23 Apr 2020 15:09:10 +0200
From:   Eric Schwarz <eas@...optimization.com>
To:     dmaengine@...r.kernel.org, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Use DMA Test Kernel Module for FPGA Device

Hello,

I think it is not possible to use the dmatest [1] kernel framework for 
testing a DMA engine located in an FPGA where the FPGA is connected to 
the host system over PCIe.
However, does any one have out-of-tree patches in order to do so for 
dmatest or knows a project which could be used for that case?

System setup:

                                          +-------+
                                          |  DDR  |
                                          +-------+
                                              |
                                              |
+--------------+                   +-------------------+
|              |                   | +------------+    |
|              |                   | | DMA Engine |    |
|              |      PCIe         | +------------+    |
|     CPU      +<----------------->+                   |
|              |                   |       FPGA        |
|              |                   |                   |
|              |                   |                   |
+--------------+                   +-------------------+


[1] 
https://www.kernel.org/doc/html/latest/driver-api/dmaengine/dmatest.html

Many thanks
Eric