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drm/virtio: Implement VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING cmd

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This cmd is useful to let the VMM (i.e, Qemu) know that the backing
store associated with a resource is no longer valid, so that the VMM
can perform any cleanup or unmap operations.

The fence related changes and virtio_gpu_object_detach()/
virtio_gpu_detach_object_fenced() routines are extracted from a
patch by Dmitry Osipenko <dmitry.osipenko@collabora.com>.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Cc: Chia-I Wu <olvaffe@gmail.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241126031643.3490496-2-vivek.kasireddy@intel.com
This commit is contained in:
Vivek Kasireddy
2024-11-25 19:13:42 -08:00
committed by Dmitry Osipenko
parent c1bae6802e
commit 06a0f77195
3 changed files with 61 additions and 0 deletions
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5
drivers/gpu/drm/virtio/virtgpu_drv.h
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@@ -92,6 +92,7 @@ struct virtio_gpu_object {
uint32_t hw_res_handle;
bool dumb;
bool created;
bool attached;
bool host3d_blob, guest_blob;
uint32_t blob_mem, blob_flags;
@@ -353,6 +354,10 @@ void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *obj,
struct virtio_gpu_mem_entry *ents,
unsigned int nents);
void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *obj,
struct virtio_gpu_fence *fence);
int virtio_gpu_detach_object_fenced(struct virtio_gpu_object *bo);
void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
struct virtio_gpu_output *output);
int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);