linux-kernel - Re: [PATCH v3 0/3] UIO support for dfl devices

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Date:   Thu, 17 Dec 2020 05:35:51 -0800
From:   Tom Rix <trix@...hat.com>
To:     Xu Yilun <yilun.xu@...el.com>, mdf@...nel.org,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, lgoncalv@...hat.com, hao.wu@...el.com
Subject: Re: [PATCH v3 0/3] UIO support for dfl devices


On 12/16/20 9:44 PM, Xu Yilun wrote:
> This patchset supports some dfl device drivers written in userspace.
>
> In the patchset v1, the "driver_override" interface should be used to bind
> the DFL UIO driver to DFL devices. But there is concern that the
> "driver_override" interface is not OK itself. So in v2, we use a new
> matching algorithem. The "driver_override" interface is abandoned, the DFL
> UIO driver matches any DFL device which could not be handled by other DFL
> drivers. So the DFL UIO driver could be used for new DFL devices which are
> not supported by kernel, also it will not impact the devices which are
> already got supported.

This set looks good to me.

Moritz,

Is it possible to get this into 5.11 ?

Tom

>
> Main changes from v1:
> - switch to the new matching algorithem. It matches DFL devices which could
>   not be handled by other DFL drivers.
> - refacor the code about device resources filling.
> - add the documentation.
>
> Main changes from v2:
> - split the match ops changes in dfl.c to an independent patch.
> - move the declarations needed for dfl-uio-pdev from include/linux/dfl.h
>   to driver/fpga/dfl.h
> - some minor fixes.
>
>
> Xu Yilun (3):
>   fpga: dfl: add the match() ops for dfl driver
>   fpga: dfl: add the userspace I/O device support for DFL devices
>   Documentation: fpga: dfl: Add description for DFL UIO support
>
>  Documentation/fpga/dfl.rst  |  27 +++++++++++
>  drivers/fpga/Kconfig        |  10 ++++
>  drivers/fpga/Makefile       |   1 +
>  drivers/fpga/dfl-uio-pdev.c | 110 ++++++++++++++++++++++++++++++++++++++++++++
>  drivers/fpga/dfl.c          |  22 +++++++--
>  drivers/fpga/dfl.h          |   5 ++
>  include/linux/dfl.h         |   3 ++
>  7 files changed, 173 insertions(+), 5 deletions(-)
>  create mode 100644 drivers/fpga/dfl-uio-pdev.c
>