[linux-block.git] / include / linux / page_reporting.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PAGE_REPORTING_H
#define _LINUX_PAGE_REPORTING_H

#include <linux/mmzone.h>
#include <linux/scatterlist.h>

/* This value should always be a power of 2, see page_reporting_cycle() */
#define PAGE_REPORTING_CAPACITY		32

struct page_reporting_dev_info {
	/* function that alters pages to make them "reported" */
	int (*report)(struct page_reporting_dev_info *prdev,
		      struct scatterlist *sg, unsigned int nents);

	/* work struct for processing reports */
	struct delayed_work work;

	/* Current state of page reporting */
	atomic_t state;

	/* Minimal order of page reporting */
	unsigned int order;
};

/* Tear-down and bring-up for page reporting devices */
void page_reporting_unregister(struct page_reporting_dev_info *prdev);
int page_reporting_register(struct page_reporting_dev_info *prdev);
#endif /*_LINUX_PAGE_REPORTING_H */
Commit	Line	Data
36e66c55 AD	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_PAGE_REPORTING_H
	3	#define _LINUX_PAGE_REPORTING_H
	4
	5	#include <linux/mmzone.h>
	6	#include <linux/scatterlist.h>
	7
43b76f29	8	/* This value should always be a power of 2, see page_reporting_cycle() */
36e66c55 AD	9	#define PAGE_REPORTING_CAPACITY 32
	10
	11	struct page_reporting_dev_info {
	12	/* function that alters pages to make them "reported" */
	13	int (report)(struct page_reporting_dev_info prdev,
	14	struct scatterlist *sg, unsigned int nents);
	15
	16	/* work struct for processing reports */
	17	struct delayed_work work;
	18
	19	/* Current state of page reporting */
	20	atomic_t state;
9f849c6f GS	21
	22	/* Minimal order of page reporting */
	23	unsigned int order;
36e66c55 AD	24	};
	25
	26	/* Tear-down and bring-up for page reporting devices */
	27	void page_reporting_unregister(struct page_reporting_dev_info *prdev);
	28	int page_reporting_register(struct page_reporting_dev_info *prdev);
	29	#endif /_LINUX_PAGE_REPORTING_H /