linux-kernel - Re: [PATCH v4 11/12] drm/virtio: switch from ttm to gem shmem helpers

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Message-ID: <20190628104907.vign7lmgftrwfisv@sirius.home.kraxel.org>
Date:   Fri, 28 Jun 2019 12:49:07 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Chia-I Wu <olvaffe@...il.com>
Cc:     ML dri-devel <dri-devel@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@...ts.linux-foundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 11/12] drm/virtio: switch from ttm to gem shmem helpers

> >  static inline struct virtio_gpu_object*
> >  virtio_gpu_object_ref(struct virtio_gpu_object *bo)

> The last users of these two helpers are removed with this patch.  We
> can remove them.

patch 12/12 does that.

> > +       bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
> > +       bo->base.base.funcs = &virtio_gpu_gem_funcs;
> Move this to virtio_gpu_create_object.

Fixed.

> > +       ret = drm_gem_shmem_pin(&obj->base.base);
> The bo is attached for its entire lifetime, at least currently.  Maybe
> we can use drm_gem_shmem_get_pages_sgt (and get rid of obj->pages).

Already checked this.
We can't due to the iommu quirks.

cheers,
  Gerd