148 static struct page **_get_pages(struct vkms_gem_object *vkms_obj)  in _get_pages()  argument
150 	struct drm_gem_object *gem_obj = &vkms_obj->gem;  in _get_pages()
152 	if (!vkms_obj->pages) {  in _get_pages()
158 		if (cmpxchg(&vkms_obj->pages, NULL, pages))  in _get_pages()
162 	return vkms_obj->pages;  in _get_pages()
167 	struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);  in vkms_gem_vunmap()  local
169 	mutex_lock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
170 	if (vkms_obj->vmap_count < 1) {  in vkms_gem_vunmap()
171 		WARN_ON(vkms_obj->vaddr);  in vkms_gem_vunmap()
172 		WARN_ON(vkms_obj->pages);  in vkms_gem_vunmap()
173 		mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
177 	vkms_obj->vmap_count--;  in vkms_gem_vunmap()
179 	if (vkms_obj->vmap_count == 0) {  in vkms_gem_vunmap()
180 		vunmap(vkms_obj->vaddr);  in vkms_gem_vunmap()
181 		vkms_obj->vaddr = NULL;  in vkms_gem_vunmap()
182 		drm_gem_put_pages(obj, vkms_obj->pages, false, true);  in vkms_gem_vunmap()
183 		vkms_obj->pages = NULL;  in vkms_gem_vunmap()
186 	mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
191 	struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);  in vkms_gem_vmap()  local
194 	mutex_lock(&vkms_obj->pages_lock);  in vkms_gem_vmap()
196 	if (!vkms_obj->vaddr) {  in vkms_gem_vmap()
198 		struct page **pages = _get_pages(vkms_obj);  in vkms_gem_vmap()
205 		vkms_obj->vaddr = vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);  in vkms_gem_vmap()
206 		if (!vkms_obj->vaddr)  in vkms_gem_vmap()
210 	vkms_obj->vmap_count++;  in vkms_gem_vmap()
215 	drm_gem_put_pages(obj, vkms_obj->pages, false, true);  in vkms_gem_vmap()
216 	vkms_obj->pages = NULL;  in vkms_gem_vmap()
218 	mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vmap()