diff options
Diffstat (limited to 'drivers/nvdimm/label.h')
| -rw-r--r-- | drivers/nvdimm/label.h | 94 |
1 files changed, 89 insertions, 5 deletions
diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 31f94fad7b92..8ee248fc214f 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -34,6 +34,7 @@ enum { * 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 @@ -43,7 +44,7 @@ enum { * @major: label area major version * @minor: label area minor version * @checksum: fletcher64 of all fields - * @free[0]: bitmap, nlabel bits + * @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 @@ -66,7 +67,39 @@ struct nd_namespace_index { }; /** - * struct nd_namespace_label - namespace superblock + * 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_* @@ -77,9 +110,14 @@ struct nd_namespace_index { * @dpa: DPA of NVM range on this DIMM * @rawsize: size of namespace * @slot: slot of this label in label area - * @unused: must be zero + * @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 nd_namespace_label { +struct nvdimm_efi_label { u8 uuid[NSLABEL_UUID_LEN]; u8 name[NSLABEL_NAME_LEN]; __le32 flags; @@ -92,7 +130,7 @@ struct nd_namespace_label { __le32 slot; /* * Accessing fields past this point should be gated by a - * namespace_label_has() check. + * efi_namespace_label_has() check. */ u8 align; u8 reserved[3]; @@ -102,11 +140,57 @@ struct nd_namespace_label { __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: "{blk|pmem}-<namespace uuid>" |