Re: XDMA dmaengine driver implementation

[Hinko Kocevar <Hinko.Kocevar@ess.eu>]

Hi Lizhi,

I found it and managed to reuse its DMA interface within the dma_ip_drivers xdma driver.

At the moment I've hacked the dma_ip_drivers xdma driver just enough that it is using the xdma dmaengine instead of most of the code in libxdma.c.

Thank,
//hinko
________________________________________
From: Lizhi Hou <lizhi.hou@amd.com>
Sent: Tuesday, January 9, 2024 5:42:13 PM
To: Hinko Kocevar; brian.xu@amd.com; raj.kumar.rampelli@amd.com
Cc: dmaengine@vger.kernel.org
Subject: Re: XDMA dmaengine driver implementation

Hi Hinko,

mgb4 driver which uses XDMA in mainline kernel. Please see:
https://github.com/torvalds/linux/blob/master/drivers/media/pci/mgb4/mgb4_core.c#L437

Thanks,

Lizhi

On 1/9/24 03:30, Hinko Kocevar wrote:
> Hi,
>
> here at ESS we are using https://github.com/Xilinx/dma_ip_drivers/tree/master/XDMA/linux-kernel kernel driver today with the micro TCA based data acquisition cards such as https://innovation.desy.de/technologies/microtca/boards/damc_fmc2zup/index_eng.html and https://www.struck.de/sis8300.html. The diver seems to be functioning just fine and it provides all the necessary software interfaces we desire.
>
> Looking at the https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git/ I noticed that there is a lot of effort in getting the XDMA dmaengine accepted into mainline kernel. As far as I understand one would need to develop an additional driver that utilizes the XDMA dmaengine driver.
>
> Is there a reference implementation of a driver that uses XDMA dmaengine that is similar to the on in dma_ip_drivers github repo?
>
> Thank you in advance!
> //hinko
>
>
>
>
>
> Hinko Kocevar
>
> Beam Diagnostics Engineer
> European Spallation Source ERIC
> Odarslövsvägen 113, SE-224 84 Lund, Sweden
> E-mail: hinko.kocevar@ess.eu
>