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| author | Dan Williams <dan.j.williams@intel.com> | 2021-09-08 22:11:58 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-09-21 13:44:56 -0700 |
| commit | 540ccaa2e4dd6d44dcd9305a007078fda597af02 (patch) | |
| tree | 289f3968d339ac3bb0a8face1cfe1a3d5dbf277a /drivers/nvdimm | |
| parent | 999c993a85f1cab8c37752db71b1f841a5d2c190 (diff) | |
| download | linux-540ccaa2e4dd6d44dcd9305a007078fda597af02.tar.gz | |
libnvdimm/label: Define CXL region labels
Add a definition of the CXL 2.0 region label format. Note this is done
as a separate patch to make the next patch that adds namespace label
support easier to read.
Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116431893.2460985.4003511000574373922.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/label.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 7fa757d478464..0519aacc29263 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -67,6 +67,38 @@ struct nd_namespace_index { }; /** + * 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 nd_namespace_label - namespace superblock * @uuid: UUID per RFC 4122 * @name: optional name (NULL-terminated) |