151 static struct page **_get_pages(struct vkms_gem_object *vkms_obj)  in _get_pages()  argument
153 	struct drm_gem_object *gem_obj = &vkms_obj->gem;  in _get_pages()
155 	if (!vkms_obj->pages) {  in _get_pages()
161 		if (cmpxchg(&vkms_obj->pages, NULL, pages))  in _get_pages()
165 	return vkms_obj->pages;  in _get_pages()
170 	struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);  in vkms_gem_vunmap()  local
172 	mutex_lock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
173 	if (vkms_obj->vmap_count < 1) {  in vkms_gem_vunmap()
174 		WARN_ON(vkms_obj->vaddr);  in vkms_gem_vunmap()
175 		WARN_ON(vkms_obj->pages);  in vkms_gem_vunmap()
176 		mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
180 	vkms_obj->vmap_count--;  in vkms_gem_vunmap()
182 	if (vkms_obj->vmap_count == 0) {  in vkms_gem_vunmap()
183 		vunmap(vkms_obj->vaddr);  in vkms_gem_vunmap()
184 		vkms_obj->vaddr = NULL;  in vkms_gem_vunmap()
185 		drm_gem_put_pages(obj, vkms_obj->pages, false, true);  in vkms_gem_vunmap()
186 		vkms_obj->pages = NULL;  in vkms_gem_vunmap()
189 	mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vunmap()
194 	struct vkms_gem_object *vkms_obj = drm_gem_to_vkms_gem(obj);  in vkms_gem_vmap()  local
197 	mutex_lock(&vkms_obj->pages_lock);  in vkms_gem_vmap()
199 	if (!vkms_obj->vaddr) {  in vkms_gem_vmap()
201 		struct page **pages = _get_pages(vkms_obj);  in vkms_gem_vmap()
208 		vkms_obj->vaddr = vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);  in vkms_gem_vmap()
209 		if (!vkms_obj->vaddr)  in vkms_gem_vmap()
213 	vkms_obj->vmap_count++;  in vkms_gem_vmap()
218 	drm_gem_put_pages(obj, vkms_obj->pages, false, true);  in vkms_gem_vmap()
219 	vkms_obj->pages = NULL;  in vkms_gem_vmap()
221 	mutex_unlock(&vkms_obj->pages_lock);  in vkms_gem_vmap()