1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2014-2015, Intel Corporation.
 4 */
 5
 6#ifndef __NVDIMM_PFN_H
 7#define __NVDIMM_PFN_H
 8
 9#include <linux/types.h>
10#include <linux/mmzone.h>
11
12#define PFN_SIG_LEN 16
13#define PFN_SIG "NVDIMM_PFN_INFO\0"
14#define DAX_SIG "NVDIMM_DAX_INFO\0"
15
16struct nd_pfn_sb {
17	u8 signature[PFN_SIG_LEN];
18	u8 uuid[16];
19	u8 parent_uuid[16];
20	__le32 flags;
21	__le16 version_major;
22	__le16 version_minor;
23	__le64 dataoff; /* relative to namespace_base + start_pad */
24	__le64 npfns;
25	__le32 mode;
26	/* minor-version-1 additions for section alignment */
27	__le32 start_pad;
28	__le32 end_trunc;
29	/* minor-version-2 record the base alignment of the mapping */
30	__le32 align;
31	/* minor-version-3 guarantee the padding and flags are zero */
32	/* minor-version-4 record the page size and struct page size */
33	__le32 page_size;
34	__le16 page_struct_size;
35	u8 padding[3994];
36	__le64 checksum;
37};
38
39#endif /* __NVDIMM_PFN_H */