blob: e901e3a3b04c9920007609f64443a8895bb2dca4 [file] [log] [blame]
Dan Williamse1455742015-07-30 17:57:47 -04001/*
2 * Copyright (c) 2014-2015, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 */
13
14#ifndef __NVDIMM_PFN_H
15#define __NVDIMM_PFN_H
16
17#include <linux/types.h>
Dan Williamsd9cbe092016-03-03 09:14:36 -080018#include <linux/mmzone.h>
Dan Williamse1455742015-07-30 17:57:47 -040019
20#define PFN_SIG_LEN 16
21#define PFN_SIG "NVDIMM_PFN_INFO\0"
Dan Williamsc5ed9262016-05-18 14:50:12 -070022#define DAX_SIG "NVDIMM_DAX_INFO\0"
Dan Williamse1455742015-07-30 17:57:47 -040023
24struct nd_pfn_sb {
25 u8 signature[PFN_SIG_LEN];
26 u8 uuid[16];
27 u8 parent_uuid[16];
28 __le32 flags;
29 __le16 version_major;
30 __le16 version_minor;
Dan Williamscfe30b82016-03-03 09:38:00 -080031 __le64 dataoff; /* relative to namespace_base + start_pad */
Dan Williamse1455742015-07-30 17:57:47 -040032 __le64 npfns;
33 __le32 mode;
Dan Williamscfe30b82016-03-03 09:38:00 -080034 /* minor-version-1 additions for section alignment */
35 __le32 start_pad;
36 __le32 end_trunc;
Dan Williams45a0dac2016-03-31 15:41:18 -070037 /* minor-version-2 record the base alignment of the mapping */
38 __le32 align;
Dan Williamsc3d7a202019-07-18 15:58:36 -070039 /* minor-version-3 guarantee the padding and flags are zero */
Dan Williams45a0dac2016-03-31 15:41:18 -070040 u8 padding[4000];
Dan Williamse1455742015-07-30 17:57:47 -040041 __le64 checksum;
42};
Dan Williamsd9cbe092016-03-03 09:14:36 -080043
44#ifdef CONFIG_SPARSEMEM
45#define PFN_SECTION_ALIGN_DOWN(x) SECTION_ALIGN_DOWN(x)
46#define PFN_SECTION_ALIGN_UP(x) SECTION_ALIGN_UP(x)
47#else
48/*
49 * In this case ZONE_DEVICE=n and we will disable 'pfn' device support,
50 * but we still want pmem to compile.
51 */
52#define PFN_SECTION_ALIGN_DOWN(x) (x)
53#define PFN_SECTION_ALIGN_UP(x) (x)
54#endif
Dan Williamscfe30b82016-03-03 09:38:00 -080055
56#define PHYS_SECTION_ALIGN_DOWN(x) PFN_PHYS(PFN_SECTION_ALIGN_DOWN(PHYS_PFN(x)))
57#define PHYS_SECTION_ALIGN_UP(x) PFN_PHYS(PFN_SECTION_ALIGN_UP(PHYS_PFN(x)))
Dan Williamse1455742015-07-30 17:57:47 -040058#endif /* __NVDIMM_PFN_H */