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c5ed926864
For autodetecting a previously established dax configuration we need the info block to indicate block-device vs device-dax mode, and we need to have the default namespace probe hand-off the configuration to the dax_pmem driver. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
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* Copyright (c) 2014-2015, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef __NVDIMM_PFN_H
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#define __NVDIMM_PFN_H
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#include <linux/types.h>
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#include <linux/mmzone.h>
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#define PFN_SIG_LEN 16
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#define PFN_SIG "NVDIMM_PFN_INFO\0"
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#define DAX_SIG "NVDIMM_DAX_INFO\0"
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struct nd_pfn_sb {
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u8 signature[PFN_SIG_LEN];
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u8 uuid[16];
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u8 parent_uuid[16];
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__le32 flags;
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__le16 version_major;
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__le16 version_minor;
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__le64 dataoff; /* relative to namespace_base + start_pad */
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__le64 npfns;
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__le32 mode;
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/* minor-version-1 additions for section alignment */
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__le32 start_pad;
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__le32 end_trunc;
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/* minor-version-2 record the base alignment of the mapping */
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__le32 align;
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u8 padding[4000];
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__le64 checksum;
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};
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#ifdef CONFIG_SPARSEMEM
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#define PFN_SECTION_ALIGN_DOWN(x) SECTION_ALIGN_DOWN(x)
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#define PFN_SECTION_ALIGN_UP(x) SECTION_ALIGN_UP(x)
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#else
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/*
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* In this case ZONE_DEVICE=n and we will disable 'pfn' device support,
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* but we still want pmem to compile.
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*/
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#define PFN_SECTION_ALIGN_DOWN(x) (x)
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#define PFN_SECTION_ALIGN_UP(x) (x)
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#endif
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#define PHYS_SECTION_ALIGN_DOWN(x) PFN_PHYS(PFN_SECTION_ALIGN_DOWN(PHYS_PFN(x)))
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#define PHYS_SECTION_ALIGN_UP(x) PFN_PHYS(PFN_SECTION_ALIGN_UP(PHYS_PFN(x)))
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#endif /* __NVDIMM_PFN_H */
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