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drm/virtio: add virtio_gpu_is_shmem helper

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The plan is use have both shmem and virtual "vram" running
side-by-side in virtio-gpu. It looks like we'll eventually use
struct drm_gem_object as a base class, and we'll need to convert
to shmem and vram objects on the fly. As a first step, add a
virtio_gpu_is_shmem helper. Thanks to kraxel for suggesting this
approach on Gitlab.

Suggested-by: Gerd Hoffman <kraxel@redhat.com>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200227002601.745-3-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gurchetan Singh 2020-02-26 16:25:55 -08:00 committed by Gerd Hoffmann
parent 068a8fea37
commit 18b39fb975
2 changed files with 10 additions and 2 deletions
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3
drivers/gpu/drm/virtio/virtgpu_drv.h
View File

@ -365,6 +365,9 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object_params *params,
struct virtio_gpu_object **bo_ptr,
struct virtio_gpu_fence *fence);
bool virtio_gpu_is_shmem(struct drm_gem_object *obj);
/* virtgpu_prime.c */
struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
struct drm_device *dev, struct dma_buf_attachment *attach,

9
drivers/gpu/drm/virtio/virtgpu_object.c
View File

@ -95,7 +95,7 @@ static void virtio_gpu_free_object(struct drm_gem_object *obj)
virtio_gpu_cleanup_object(bo);
}
static const struct drm_gem_object_funcs virtio_gpu_gem_funcs = {
static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
.free = virtio_gpu_free_object,
.open = virtio_gpu_gem_object_open,
.close = virtio_gpu_gem_object_close,
@ -109,6 +109,11 @@ static const struct drm_gem_object_funcs virtio_gpu_gem_funcs = {
.mmap = drm_gem_shmem_mmap,
};
bool virtio_gpu_is_shmem(struct drm_gem_object *obj)
{
return obj->funcs == &virtio_gpu_shmem_funcs;
}
struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
size_t size)
{
@ -118,7 +123,7 @@ struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
if (!bo)
return NULL;
bo->base.base.funcs = &virtio_gpu_gem_funcs;
bo->base.base.funcs = &virtio_gpu_shmem_funcs;
return &bo->base.base;
}