linux-kernel - Re: [PATCH v5 27/28] fpga: dfl: afu: add afu sub feature support

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Date:   Wed, 6 Jun 2018 11:04:15 -0500
From:   Alan Tull <atull@...nel.org>
To:     Wu Hao <hao.wu@...el.com>
Cc:     Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-api@...r.kernel.org, "Kang, Luwei" <luwei.kang@...el.com>,
        "Zhang, Yi Z" <yi.z.zhang@...el.com>,
        Xiao Guangrong <guangrong.xiao@...ux.intel.com>,
        Tim Whisonant <tim.whisonant@...el.com>,
        Enno Luebbers <enno.luebbers@...el.com>,
        Shiva Rao <shiva.rao@...el.com>,
        Christopher Rauer <christopher.rauer@...el.com>
Subject: Re: [PATCH v5 27/28] fpga: dfl: afu: add afu sub feature support

On Tue, May 1, 2018 at 9:50 PM, Wu Hao <hao.wu@...el.com> wrote:

Hi Hao,

> From: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
>
> User Accelerated Function Unit sub feature exposes the MMIO region of
> the AFU. After valid PR bitstream is programmed and the port is enabled,
> then this MMIO region could be accessed.
>
> This patch adds support to enumerate the AFU MMIO region and expose it
> to userspace via mmap file operation. Below interfaces are exposed to user:
>
> Sysfs interface:
> * /sys/class/fpga_region/<regionX>/<dfl-port.x>/afu_id
>   Read-only. Indicate which PR bitstream is programmed to this AFU.
>
> Ioctl interfaces:
> * DFL_FPGA_PORT_GET_INFO
>   Provide info to userspace on the number of supported region.
>   Only UAFU region is supported now.
>
> * DFL_FPGA_PORT_GET_REGION_INFO
>   Provide region information, including access permission, region size,
>   offset from the start of device fd.
>
> Signed-off-by: Tim Whisonant <tim.whisonant@...el.com>
> Signed-off-by: Enno Luebbers <enno.luebbers@...el.com>
> Signed-off-by: Shiva Rao <shiva.rao@...el.com>
> Signed-off-by: Christopher Rauer <christopher.rauer@...el.com>
> Signed-off-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
> Signed-off-by: Wu Hao <hao.wu@...el.com>
Acked-by: Alan Tull <atull@...nel.org>