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drm/virtio: rework resource creation workflow.

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This patch moves the virtio_gpu_cmd_create_resource() call (which
notifies the host about the new resource created) into the
virtio_gpu_object_create() function.  That way we can call
virtio_gpu_cmd_create_resource() before ttm_bo_init(), so the host
already knows about the object when ttm initializes the object and calls
our driver callbacks.

Specifically the object is already created when the
virtio_gpu_ttm_tt_bind() callback invokes virtio_gpu_object_attach(),
so the extra virtio_gpu_object_attach() calls done after
virtio_gpu_object_create() are not needed any more.

The fence support for the create ioctl becomes a bit more tricky though.
The code moved into virtio_gpu_object_create() too.  We first submit the
(fenced) virtio_gpu_cmd_create_resource() command, then initialize the
ttm object, and finally attach just created object to the fence for the
command in case it didn't finish yet.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190318113332.10900-6-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann
2019-03-18 12:33:32 +01:00
parent fd4d6a4277
commit 530b28426a
6 changed files with 83 additions and 91 deletions
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19
drivers/gpu/drm/virtio/virtgpu_gem.c
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@@ -36,13 +36,14 @@ void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
struct virtio_gpu_object*
virtio_gpu_alloc_object(struct drm_device *dev,
struct virtio_gpu_object_params *params)
struct virtio_gpu_object_params *params,
struct virtio_gpu_fence *fence)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_object *obj;
int ret;
ret = virtio_gpu_object_create(vgdev, params, &obj);
ret = virtio_gpu_object_create(vgdev, params, &obj, fence);
if (ret)
return ERR_PTR(ret);
@@ -59,7 +60,7 @@ int virtio_gpu_gem_create(struct drm_file *file,
int ret;
u32 handle;
obj = virtio_gpu_alloc_object(dev, params);
obj = virtio_gpu_alloc_object(dev, params, NULL);
if (IS_ERR(obj))
return PTR_ERR(obj);
@@ -82,9 +83,7 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
struct drm_gem_object *gobj;
struct virtio_gpu_object *obj;
struct virtio_gpu_object_params params = { 0 };
int ret;
uint32_t pitch;
@@ -100,20 +99,12 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
params.width = args->width;
params.height = args->height;
params.size = args->size;
params.dumb = true;
ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
&args->handle);
if (ret)
goto fail;
obj = gem_to_virtio_gpu_obj(gobj);
virtio_gpu_cmd_create_resource(vgdev, obj, &params);
/* attach the object to the resource */
ret = virtio_gpu_object_attach(vgdev, obj, NULL);
if (ret)
goto fail;
obj->dumb = true;
args->pitch = pitch;
return ret;