qxl: add fb and ttm entry points for use by suspend/resume.

This just ports some APIs like radeon uses to provide hooks for s/r to
call.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/qxl/qxl_drv.h

@@ -332,6 +332,7 @@ int qxl_bo_init(struct qxl_device *qdev);
 void qxl_bo_fini(struct qxl_device *qdev);
 
 void qxl_reinit_memslots(struct qxl_device *qdev);
+int qxl_surf_evict(struct qxl_device *qdev);
 
 struct qxl_ring *qxl_ring_create(struct qxl_ring_header *header,
 				 int element_size,
@@ -369,6 +370,7 @@ void qxl_fbdev_fini(struct qxl_device *qdev);
 int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
 				  struct drm_file *file_priv,
 				  uint32_t *handle);
+void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state);
 
 /* qxl_display.c */
 int
@@ -534,6 +536,7 @@ irqreturn_t qxl_irq_handler(DRM_IRQ_ARGS);
 
 /* qxl_fb.c */
 int qxl_fb_init(struct qxl_device *qdev);
+bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj);
 
 int qxl_debugfs_add_files(struct qxl_device *qdev,
 			  struct drm_info_list *files,

drivers/gpu/drm/qxl/qxl_fb.c

@@ -560,4 +560,14 @@ void qxl_fbdev_fini(struct qxl_device *qdev)
 	qdev->mode_info.qfbdev = NULL;
 }
 
+void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
+{
+	fb_set_suspend(qdev->mode_info.qfbdev->helper.fbdev, state);
+}
 
+bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
+{
+	if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
+		return true;
+	return false;
+}

drivers/gpu/drm/qxl/qxl_object.c

@@ -363,3 +363,8 @@ int qxl_bo_list_add(struct qxl_reloc_list *reloc_list, struct qxl_bo *bo)
 		return ret;
 	return 0;
 }
+
+int qxl_surf_evict(struct qxl_device *qdev)
+{
+	return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
+}