From: Gerd Hoffmann <kraxel@redhat.com>
To: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
David Airlie <airlied@linux.ie>,
Stefan Hajnoczi <stefanha@gmail.com>,
Jason Wang <jasowang@redhat.com>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
virtualization@lists.linux-foundation.org, kernel@collabora.com
Subject: Re: [PATCH v3 1/2] drm/virtio: Add window server support
Date: Mon, 12 Feb 2018 16:29:03 +0100 [thread overview]
Message-ID: <20180212152903.24t6sdgthg2aptnn@sirius.home.kraxel.org> (raw)
In-Reply-To: <6cf0c06a-b884-3251-166b-6ff3dec3ebc7@collabora.com>
> > I was more thinking about a struct containing enough info to allow the
> > proxy on the host side find the buffer, something like:
> >
> > struct {
> > enum type { stdvga, virtio-cpu, ... }
> > pcislot device;
> > union {
> > int stdvga_pcibar_offset;
> > int virtio_gpu_resource_id;
> > }
> > }
> >
> > So when the guest proxy gets a message with a fd referencing a buffer it
> > would have to figure where the buffer is, rewrite the message into the
> > struct above for the host proxy. The host proxy would rewrite the
> > message again for the server.
>
> What I don't understand yet is how we can keep the buffer descriptions
> together with the protocol data that references them.
>
> With SCM_RIGHTS, the FDs are placed in the ancillary data that "travels"
> together with the protocol data that references them.
Place the buffer description into the wayland extension protocol messages?
i.e. have some wl_virt_proxy protocol extension. Then, for the stdvga case:
(1) client sends wl_drm/create_prime_buffer request to the guest proxy
(2) guest proxy rewrites this into wl_virt_proxy/create_buffer, or
maybe a create_stdvga_buffer request, carrying all the information
listed above, and sends it to the host proxy.
(3) host proxy rewrites it again into a wl_shm_pool/create_buffer and
forwards it to the server.
cheers,
Gerd
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next prev parent reply other threads:[~2018-02-12 15:29 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-26 13:58 [PATCH v3 0/2] drm/virtio: Add window server support Tomeu Vizoso
2018-01-26 13:58 ` [PATCH v3 1/2] " Tomeu Vizoso
2018-02-01 16:36 ` Gerd Hoffmann
2018-02-05 8:19 ` Tomeu Vizoso
2018-02-05 12:20 ` Gerd Hoffmann
2018-02-05 14:46 ` Tomeu Vizoso
2018-02-05 16:03 ` Gerd Hoffmann
2018-02-06 12:41 ` Tomeu Vizoso
2018-02-06 14:23 ` Gerd Hoffmann
2018-02-07 1:09 ` Michael S. Tsirkin
2018-02-07 7:41 ` Tomeu Vizoso
2018-02-07 9:49 ` Tomeu Vizoso
2018-02-09 11:14 ` Tomeu Vizoso
2018-02-12 11:52 ` Gerd Hoffmann
2018-02-12 14:00 ` Tomeu Vizoso
2018-02-12 14:27 ` Gerd Hoffmann
2018-02-12 14:42 ` Tomeu Vizoso
2018-02-12 15:29 ` Gerd Hoffmann [this message]
2018-02-12 11:45 ` Gerd Hoffmann
2018-02-13 7:41 ` Pekka Paalanen
2018-02-13 14:27 ` Tomeu Vizoso
2018-02-16 10:48 ` Gerd Hoffmann
2018-02-15 15:28 ` Tomeu Vizoso
2018-02-06 15:00 ` Pekka Paalanen
2019-03-18 12:47 ` Tomeu Vizoso
2018-01-26 13:58 ` [PATCH v3 2/2] drm/virtio: Handle buffers from the compositor Tomeu Vizoso
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