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drm/virtio: implement context init: handle VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK

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For the Sommelier guest Wayland proxy, it's desirable for the
DRM fd to be pollable in response to an host compositor event.
This can also be used by the 3D driver to poll events on a CPU
timeline.

This enables the DRM fd associated with a particular 3D context
to be polled independent of KMS events.  The parameter
VIRTGPU_CONTEXT_PARAM_POLL_RINGS_MASK specifies the pollable
rings.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Acked-by: Nicholas Verne <nverne@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20210921232024.817-11-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh
2021-09-21 16:20:22 -07:00
committed by Gerd Hoffmann
parent 85c83ea915
commit 8d6b006e1f
2 changed files with 22 additions and 1 deletions
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1
drivers/gpu/drm/virtio/virtgpu_drv.h
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@@ -266,6 +266,7 @@ struct virtio_gpu_fpriv {
bool context_created;
uint32_t num_rings;
uint64_t base_fence_ctx;
uint64_t ring_idx_mask;
struct mutex context_lock;
};