136e66c55SAlexander Duyck /* SPDX-License-Identifier: GPL-2.0 */ 236e66c55SAlexander Duyck #ifndef _LINUX_PAGE_REPORTING_H 336e66c55SAlexander Duyck #define _LINUX_PAGE_REPORTING_H 436e66c55SAlexander Duyck 536e66c55SAlexander Duyck #include <linux/mmzone.h> 636e66c55SAlexander Duyck #include <linux/scatterlist.h> 736e66c55SAlexander Duyck 843b76f29SAlexander Duyck /* This value should always be a power of 2, see page_reporting_cycle() */ 936e66c55SAlexander Duyck #define PAGE_REPORTING_CAPACITY 32 1036e66c55SAlexander Duyck 1136e66c55SAlexander Duyck struct page_reporting_dev_info { 1236e66c55SAlexander Duyck /* function that alters pages to make them "reported" */ 1336e66c55SAlexander Duyck int (*report)(struct page_reporting_dev_info *prdev, 1436e66c55SAlexander Duyck struct scatterlist *sg, unsigned int nents); 1536e66c55SAlexander Duyck 1636e66c55SAlexander Duyck /* work struct for processing reports */ 1736e66c55SAlexander Duyck struct delayed_work work; 1836e66c55SAlexander Duyck 1936e66c55SAlexander Duyck /* Current state of page reporting */ 2036e66c55SAlexander Duyck atomic_t state; 21*9f849c6fSGavin Shan 22*9f849c6fSGavin Shan /* Minimal order of page reporting */ 23*9f849c6fSGavin Shan unsigned int order; 2436e66c55SAlexander Duyck }; 2536e66c55SAlexander Duyck 2636e66c55SAlexander Duyck /* Tear-down and bring-up for page reporting devices */ 2736e66c55SAlexander Duyck void page_reporting_unregister(struct page_reporting_dev_info *prdev); 2836e66c55SAlexander Duyck int page_reporting_register(struct page_reporting_dev_info *prdev); 2936e66c55SAlexander Duyck #endif /*_LINUX_PAGE_REPORTING_H */ 30