linux-kernel - Re: [PATCH v6 15/18] drm/virtio: rework virtio_gpu_transfer_to_host

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Message-ID: <20190704115138.ou77sb3rlrex67tj@sirius.home.kraxel.org>
Date:   Thu, 4 Jul 2019 13:51:38 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Chia-I Wu <olvaffe@...il.com>
Cc:     ML dri-devel <dri-devel@...ts.freedesktop.org>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@...ts.linux-foundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 15/18] drm/virtio: rework
 virtio_gpu_transfer_to_host_ioctl fencing

  Hi,

> >         convert_to_hw_box(&box, &args->box);
> >         if (!vgdev->has_virgl_3d) {
> >                 virtio_gpu_cmd_transfer_to_host_2d
> > -                       (vgdev, qobj, offset,
> > +                       (vgdev, gem_to_virtio_gpu_obj(objs->objs[0]), offset,
> >                          box.w, box.h, box.x, box.y, NULL);
> > +               virtio_gpu_array_put_free(objs);
> Don't we need this in non-3D case as well?

No, ...

> >                 virtio_gpu_cmd_transfer_to_host_3d
> > -                       (vgdev, qobj,
> > +                       (vgdev,
> >                          vfpriv ? vfpriv->ctx_id : 0, offset,
> > -                        args->level, &box, fence);
> > -               reservation_object_add_excl_fence(qobj->base.base.resv,
> > -                                                 &fence->f);
> > +                        args->level, &box, objs, fence);

... 3d case passes the objs list to virtio_gpu_cmd_transfer_to_host_3d,
so it gets added to the vbuf and released when the command is finished.

cheers,
  Gerd