linux-kernel - Re: [PATCH] accel: Add .mmap to DRM_ACCEL

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Date:   Wed, 18 Jan 2023 08:16:12 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     Jeffrey Hugo <quic_jhugo@...cinc.com>
Cc:     jacek.lawrynowicz@...ux.intel.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] accel: Add .mmap to DRM_ACCEL_FOPS

On Tue, Jan 17, 2023 at 7:48 PM Jeffrey Hugo <quic_jhugo@...cinc.com> wrote:
>
> In reviewing the ivpu driver, DEFINE_DRM_ACCEL_FOPS could have been used
> if DRM_ACCEL_FOPS defined .mmap to be drm_gem_mmap.  Lets add that since
> accel drivers are a variant of drm drivers, modern drm drivers are
> expected to use GEM, and mmap() is a common operation that is expected
> to be heavily used in accel drivers thus the common accel driver should
> be able to just use DEFINE_DRM_ACCEL_FOPS() for convenience.
>
> Signed-off-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
> ---
>  include/drm/drm_accel.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/include/drm/drm_accel.h b/include/drm/drm_accel.h
> index 65c0affb..d495506 100644
> --- a/include/drm/drm_accel.h
> +++ b/include/drm/drm_accel.h
> @@ -27,7 +27,8 @@
>         .compat_ioctl   = drm_compat_ioctl,\
>         .poll           = drm_poll,\
>         .read           = drm_read,\
> -       .llseek         = noop_llseek
> +       .llseek         = noop_llseek, \
> +       .mmap           = drm_gem_mmap
>
>  /**
>   * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
> --
> 2.7.4
>

Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
I'll merge it through my tree.
Thanks,
Oded