drm/virtio: implement context init: support init ioctl

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This implements the context initialization ioctl.  A list of params
is passed in by userspace, and kernel driver validates them.  The
only currently supported param is VIRTGPU_CONTEXT_PARAM_CAPSET_ID.

If the context has already been initialized, -EEXIST is returned.
This happens after Linux userspace does dumb_create + followed by
opening the Mesa virgl driver with the same virtgpu instance.

However, for most applications, 3D contexts will be explicitly
initialized when the feature is available.

Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Acked-by: Lingfeng Yang <lfy@google.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210921232024.817-6-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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Anthoine Bourgeois 2021-09-21 16:20:17 -07:00 • committed by Gerd Hoffmann

parent 6198770a1f

commit 4fb530e5ca

3 changed files with 98 additions and 8 deletions

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6

drivers/gpu/drm/virtio/virtgpu_drv.h

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96

drivers/gpu/drm/virtio/virtgpu_ioctl.c

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4

drivers/gpu/drm/virtio/virtgpu_vq.c

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