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drm/virtio: implement blob resources: refactor UUID code somewhat 

For upcoming blob resources, userspace can specify that the
resource will be used for cross-device sharing. This is mainly
for exportable blobs that will only shared with the virtgpu
display but not across devices.

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-15-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh 2020-09-23 17:32:10 -07:00 committed by Gerd Hoffmann
parent 0b0f1afe6c
commit 1e2554f49e
2 changed files with 30 additions and 12 deletions
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2
drivers/gpu/drm/virtio/virtgpu_drv.h
View File

@ -432,6 +432,8 @@ bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo);
int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
uint32_t *resid);
/* virtgpu_prime.c */
int virtio_gpu_resource_assign_uuid(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo);
struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
int flags);
struct drm_gem_object *virtgpu_gem_prime_import(struct drm_device *dev,

40
drivers/gpu/drm/virtio/virtgpu_prime.c
View File

@ -59,6 +59,24 @@ const struct virtio_dma_buf_ops virtgpu_dmabuf_ops = {
.get_uuid = virtgpu_virtio_get_uuid,
};
int virtio_gpu_resource_assign_uuid(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *bo)
{
int ret;
struct virtio_gpu_object_array *objs;
objs = virtio_gpu_array_alloc(1);
if (!objs)
return -ENOMEM;
virtio_gpu_array_add_obj(objs, &bo->base.base);
ret = virtio_gpu_cmd_resource_assign_uuid(vgdev, objs);
if (ret)
return ret;
return 0;
}
struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
int flags)
{
@ -66,22 +84,20 @@ struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
struct drm_device *dev = obj->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
struct virtio_gpu_object_array *objs;
int ret = 0;
bool blob = bo->host3d_blob || bo->guest_blob;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
if (vgdev->has_resource_assign_uuid) {
objs = virtio_gpu_array_alloc(1);
if (!objs)
return ERR_PTR(-ENOMEM);
virtio_gpu_array_add_obj(objs, &bo->base.base);
if (!blob) {
if (vgdev->has_resource_assign_uuid) {
ret = virtio_gpu_resource_assign_uuid(vgdev, bo);
if (ret)
return ERR_PTR(ret);
ret = virtio_gpu_cmd_resource_assign_uuid(vgdev, objs);
if (ret)
return ERR_PTR(ret);
virtio_gpu_notify(vgdev);
} else {
bo->uuid_state = STATE_ERR;
virtio_gpu_notify(vgdev);
} else {
bo->uuid_state = STATE_ERR;
}
}
exp_info.ops = &virtgpu_dmabuf_ops.ops;