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drm/virtio: implement blob resources: fix stride discrepancy

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The old transfer ioctls may work on blob resources, and there is no
TRANSFER_BLOB hypercall now for simplicity.

The guest may have a image view on the blob resources such that the
stride is not equal to width * bytes_per_pixel.

For host-only blobs, we can repurpose the transfer ioctls to synchronize
caches as well.  For guest-only blobs, these operations are undefined
for now so leave them out.

Also, with seamless Wayland integration between guest/host looking
increasingly attractive, it also makes sense to keep track of
one value for stride.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-16-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh
2020-09-23 17:32:11 -07:00
committed by Gerd Hoffmann
parent 1e2554f49e
commit 50c3d1938e
3 changed files with 47 additions and 6 deletions
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4
drivers/gpu/drm/virtio/virtgpu_drv.h
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@@ -351,12 +351,16 @@ void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
uint32_t ctx_id,
uint64_t offset, uint32_t level,
uint32_t stride,
uint32_t layer_stride,
struct drm_virtgpu_3d_box *box,
struct virtio_gpu_object_array *objs,
struct virtio_gpu_fence *fence);
void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
uint32_t ctx_id,
uint64_t offset, uint32_t level,
uint32_t stride,
uint32_t layer_stride,
struct drm_virtgpu_3d_box *box,
struct virtio_gpu_object_array *objs,
struct virtio_gpu_fence *fence);