/*
|
* Copyright (c) 2014-2015, Intel Corporation.
|
*
|
* This program is free software; you can redistribute it and/or modify it
|
* under the terms and conditions of the GNU General Public License,
|
* version 2, as published by the Free Software Foundation.
|
*
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
* more details.
|
*/
|
|
#ifndef __NVDIMM_PFN_H
|
#define __NVDIMM_PFN_H
|
|
#include <linux/types.h>
|
#include <linux/mmzone.h>
|
|
#define PFN_SIG_LEN 16
|
#define PFN_SIG "NVDIMM_PFN_INFO\0"
|
#define DAX_SIG "NVDIMM_DAX_INFO\0"
|
|
struct nd_pfn_sb {
|
u8 signature[PFN_SIG_LEN];
|
u8 uuid[16];
|
u8 parent_uuid[16];
|
__le32 flags;
|
__le16 version_major;
|
__le16 version_minor;
|
__le64 dataoff; /* relative to namespace_base + start_pad */
|
__le64 npfns;
|
__le32 mode;
|
/* minor-version-1 additions for section alignment */
|
__le32 start_pad;
|
__le32 end_trunc;
|
/* minor-version-2 record the base alignment of the mapping */
|
__le32 align;
|
/* minor-version-3 guarantee the padding and flags are zero */
|
u8 padding[4000];
|
__le64 checksum;
|
};
|
|
#ifdef CONFIG_SPARSEMEM
|
#define PFN_SECTION_ALIGN_DOWN(x) SECTION_ALIGN_DOWN(x)
|
#define PFN_SECTION_ALIGN_UP(x) SECTION_ALIGN_UP(x)
|
#else
|
/*
|
* In this case ZONE_DEVICE=n and we will disable 'pfn' device support,
|
* but we still want pmem to compile.
|
*/
|
#define PFN_SECTION_ALIGN_DOWN(x) (x)
|
#define PFN_SECTION_ALIGN_UP(x) (x)
|
#endif
|
|
#define PHYS_SECTION_ALIGN_DOWN(x) PFN_PHYS(PFN_SECTION_ALIGN_DOWN(PHYS_PFN(x)))
|
#define PHYS_SECTION_ALIGN_UP(x) PFN_PHYS(PFN_SECTION_ALIGN_UP(PHYS_PFN(x)))
|
#endif /* __NVDIMM_PFN_H */
|
