/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2014-2015, Intel Corporation. */ #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; 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 */