diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2021-09-08 22:11:48 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-09-21 13:44:55 -0700 |
| commit | 42e192aa9891f196bc1adaaeab9a23d975618e5e (patch) | |
| tree | 60541147ce5f934c2d2a25aea0e0b7376357f8de /drivers/nvdimm/nd.h | |
| parent | 8172db92527c936c638b52274fbd06a0a624a56b (diff) | |
| download | linux-42e192aa9891f196bc1adaaeab9a23d975618e5e.tar.gz linux-42e192aa9891f196bc1adaaeab9a23d975618e5e.tar.bz2 linux-42e192aa9891f196bc1adaaeab9a23d975618e5e.zip | |
libnvdimm/labels: Introduce the concept of multi-range namespace labels
The CXL specification defines a mechanism for namespaces to be comprised
of multiple dis-contiguous ranges. Introduce that concept to the legacy
NVDIMM namespace implementation with a new nsl_set_nrange() helper, that
sets the number of ranges to 1. Once the NVDIMM subsystem supports CXL
labels and updates its namespace capacity provisioning for
dis-contiguous support nsl_set_nrange() can be updated, but in the
meantime CXL label validation requires nrange be non-zero.
Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116430804.2460985.5482188351381597529.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/nd.h')
| -rw-r--r-- | drivers/nvdimm/nd.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 036638bdb7e3..d57f95a48fe1 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -164,6 +164,19 @@ static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd, nd_label->nlabel = __cpu_to_le16(nlabel); } +static inline u16 nsl_get_nrange(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *nd_label) +{ + /* EFI labels do not have an nrange field */ + return 1; +} + +static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *nd_label, + u16 nrange) +{ +} + static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { |