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 16 struct 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 u8 padding[4000]; 33 __le64 checksum; 34 }; 35 36 #endif /* __NVDIMM_PFN_H */ 37