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drm/virtio: implement blob resources: report blob mem to userspace 

The stride field has never been used, so repurpose it to be
"blob_mem". This way, userspace can know the memory properties
of the blob if it's passed between userspace processes and
no suitable userspace API exists to transmit that knowledge.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-17-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh 2020-09-23 17:32:12 -07:00 committed by Gerd Hoffmann
parent 50c3d1938e
commit 4429b5de01
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/virtio/virtgpu_ioctl.c
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@ -301,6 +301,9 @@ static int virtio_gpu_resource_info_ioctl(struct drm_device *dev, void *data,
ri->size = qobj->base.base.size;
ri->res_handle = qobj->hw_res_handle;
if (qobj->host3d_blob || qobj->guest_blob)
ri->blob_mem = qobj->blob_mem;
drm_gem_object_put(gobj);
return 0;
}