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[v3,17/19] drm/virtio: implement blob resources: report blob mem to userspace

Message ID 20200917000838.735-17-gurchetansingh@chromium.org
State New, archived
Headers show
Series [v3,01/19] drm/virtio: blob prep: refactor getting pages and attaching backing | expand

Commit Message

Gurchetan Singh Sept. 17, 2020, 12:08 a.m. UTC
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>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 0bf789f2bfdec..b0c9dd171ad8a 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -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;
 }