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

From: Alan Tull
Date: Wed Jun 06 2018 - 12:05:02 EST

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

Hi Hao,

> From: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
> 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:
> Provide info to userspace on the number of supported region.
> Only UAFU region is supported now.
> Provide region information, including access permission, region size,
> offset from the start of device fd.
> Signed-off-by: Tim Whisonant <tim.whisonant@xxxxxxxxx>
> Signed-off-by: Enno Luebbers <enno.luebbers@xxxxxxxxx>
> Signed-off-by: Shiva Rao <shiva.rao@xxxxxxxxx>
> Signed-off-by: Christopher Rauer <christopher.rauer@xxxxxxxxx>
> Signed-off-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
> Signed-off-by: Wu Hao <hao.wu@xxxxxxxxx>
Acked-by: Alan Tull <atull@xxxxxxxxxx>