Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Dan J Williams | 514 | 97.90% | 19 | 79.17% |
Vishal Verma | 4 | 0.76% | 1 | 4.17% |
Toshi Kani | 2 | 0.38% | 1 | 4.17% |
Thomas Gleixner | 2 | 0.38% | 1 | 4.17% |
Alexander Duyck | 2 | 0.38% | 1 | 4.17% |
Gustavo A. R. Silva | 1 | 0.19% | 1 | 4.17% |
Total | 525 | 24 |
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. */ #ifndef __LABEL_H__ #define __LABEL_H__ #include <linux/ndctl.h> #include <linux/sizes.h> #include <linux/uuid.h> #include <linux/io.h> enum { NSINDEX_SIG_LEN = 16, NSINDEX_ALIGN = 256, NSINDEX_SEQ_MASK = 0x3, NSLABEL_UUID_LEN = 16, NSLABEL_NAME_LEN = 64, NSLABEL_FLAG_ROLABEL = 0x1, /* read-only label */ NSLABEL_FLAG_LOCAL = 0x2, /* DIMM-local namespace */ NSLABEL_FLAG_BTT = 0x4, /* namespace contains a BTT */ NSLABEL_FLAG_UPDATING = 0x8, /* label being updated */ BTT_ALIGN = 4096, /* all btt structures */ BTTINFO_SIG_LEN = 16, BTTINFO_UUID_LEN = 16, BTTINFO_FLAG_ERROR = 0x1, /* error state (read-only) */ BTTINFO_MAJOR_VERSION = 1, ND_LABEL_MIN_SIZE = 256 * 4, /* see sizeof_namespace_index() */ ND_LABEL_ID_SIZE = 50, ND_NSINDEX_INIT = 0x1, }; /** * struct nd_namespace_index - label set superblock * @sig: NAMESPACE_INDEX\0 * @flags: placeholder * @labelsize: log2 size (v1 labels 128 bytes v2 labels 256 bytes) * @seq: sequence number for this index * @myoff: offset of this index in label area * @mysize: size of this index struct * @otheroff: offset of other index * @labeloff: offset of first label slot * @nslot: total number of label slots * @major: label area major version * @minor: label area minor version * @checksum: fletcher64 of all fields * @free: bitmap, nlabel bits * * The size of free[] is rounded up so the total struct size is a * multiple of NSINDEX_ALIGN bytes. Any bits this allocates beyond * nlabel bits must be zero. */ struct nd_namespace_index { u8 sig[NSINDEX_SIG_LEN]; u8 flags[3]; u8 labelsize; __le32 seq; __le64 myoff; __le64 mysize; __le64 otheroff; __le64 labeloff; __le32 nslot; __le16 major; __le16 minor; __le64 checksum; u8 free[]; }; /** * struct cxl_region_label - CXL 2.0 Table 211 * @type: uuid identifying this label format (region) * @uuid: uuid for the region this label describes * @flags: NSLABEL_FLAG_UPDATING (all other flags reserved) * @nlabel: 1 per interleave-way in the region * @position: this label's position in the set * @dpa: start address in device-local capacity for this label * @rawsize: size of this label's contribution to region * @hpa: mandatory system physical address to map this region * @slot: slot id of this label in label area * @ig: interleave granularity (1 << @ig) * 256 bytes * @align: alignment in SZ_256M blocks * @reserved: reserved * @checksum: fletcher64 sum of this label */ struct cxl_region_label { u8 type[NSLABEL_UUID_LEN]; u8 uuid[NSLABEL_UUID_LEN]; __le32 flags; __le16 nlabel; __le16 position; __le64 dpa; __le64 rawsize; __le64 hpa; __le32 slot; __le32 ig; __le32 align; u8 reserved[0xac]; __le64 checksum; }; /** * struct nvdimm_efi_label - namespace superblock * @uuid: UUID per RFC 4122 * @name: optional name (NULL-terminated) * @flags: see NSLABEL_FLAG_* * @nlabel: num labels to describe this ns * @position: labels position in set * @isetcookie: interleave set cookie * @lbasize: LBA size in bytes or 0 for pmem * @dpa: DPA of NVM range on this DIMM * @rawsize: size of namespace * @slot: slot of this label in label area * @align: physical address alignment of the namespace * @reserved: reserved * @type_guid: copy of struct acpi_nfit_system_address.range_guid * @abstraction_guid: personality id (btt, btt2, fsdax, devdax....) * @reserved2: reserved * @checksum: fletcher64 sum of this object */ struct nvdimm_efi_label { u8 uuid[NSLABEL_UUID_LEN]; u8 name[NSLABEL_NAME_LEN]; __le32 flags; __le16 nlabel; __le16 position; __le64 isetcookie; __le64 lbasize; __le64 dpa; __le64 rawsize; __le32 slot; /* * Accessing fields past this point should be gated by a * efi_namespace_label_has() check. */ u8 align; u8 reserved[3]; guid_t type_guid; guid_t abstraction_guid; u8 reserved2[88]; __le64 checksum; }; /** * struct nvdimm_cxl_label - CXL 2.0 Table 212 * @type: uuid identifying this label format (namespace) * @uuid: uuid for the namespace this label describes * @name: friendly name for the namespace * @flags: NSLABEL_FLAG_UPDATING (all other flags reserved) * @nrange: discontiguous namespace support * @position: this label's position in the set * @dpa: start address in device-local capacity for this label * @rawsize: size of this label's contribution to namespace * @slot: slot id of this label in label area * @align: alignment in SZ_256M blocks * @region_uuid: host interleave set identifier * @abstraction_uuid: personality driver for this namespace * @lbasize: address geometry for disk-like personalities * @reserved: reserved * @checksum: fletcher64 sum of this label */ struct nvdimm_cxl_label { u8 type[NSLABEL_UUID_LEN]; u8 uuid[NSLABEL_UUID_LEN]; u8 name[NSLABEL_NAME_LEN]; __le32 flags; __le16 nrange; __le16 position; __le64 dpa; __le64 rawsize; __le32 slot; __le32 align; u8 region_uuid[16]; u8 abstraction_uuid[16]; __le16 lbasize; u8 reserved[0x56]; __le64 checksum; }; struct nd_namespace_label { union { struct nvdimm_cxl_label cxl; struct nvdimm_efi_label efi; }; }; #define NVDIMM_BTT_GUID "8aed63a2-29a2-4c66-8b12-f05d15d3922a" #define NVDIMM_BTT2_GUID "18633bfc-1735-4217-8ac9-17239282d3f8" #define NVDIMM_PFN_GUID "266400ba-fb9f-4677-bcb0-968f11d0d225" #define NVDIMM_DAX_GUID "97a86d9c-3cdd-4eda-986f-5068b4f80088" #define CXL_REGION_UUID "529d7c61-da07-47c4-a93f-ecdf2c06f444" #define CXL_NAMESPACE_UUID "68bb2c0a-5a77-4937-9f85-3caf41a0f93c" /** * struct nd_label_id - identifier string for dpa allocation * @id: "pmem-<namespace uuid>" */ struct nd_label_id { char id[ND_LABEL_ID_SIZE]; }; /* * If the 'best' index is invalid, so is the 'next' index. Otherwise, * the next index is MOD(index+1, 2) */ static inline int nd_label_next_nsindex(int index) { if (index < 0) return -1; return (index + 1) % 2; } struct nvdimm_drvdata; int nd_label_data_init(struct nvdimm_drvdata *ndd); size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd); int nd_label_active_count(struct nvdimm_drvdata *ndd); struct nd_namespace_label *nd_label_active(struct nvdimm_drvdata *ndd, int n); u32 nd_label_alloc_slot(struct nvdimm_drvdata *ndd); bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot); u32 nd_label_nfree(struct nvdimm_drvdata *ndd); struct nd_region; struct nd_namespace_pmem; int nd_pmem_namespace_label_update(struct nd_region *nd_region, struct nd_namespace_pmem *nspm, resource_size_t size); #endif /* __LABEL_H__ */
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