[PATCH V3 17/20] cxl/pmem: Preserve region information into nd_set

Neeraj Kumar
2025-09-17T13:30:57Z

Save region information stored in cxlr to nd_set during
cxl_pmem_region_probe in nd_set. This saved region information is being
stored into LSA, which will be used for cxl region persistence

Signed-off-by: Neeraj Kumar <s.neeraj@samsung.com>
---
drivers/cxl/pmem.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/cxl/pmem.c b/drivers/cxl/pmem.c
index e197883690ef..38a5bcdc68ce 100644
--- a/drivers/cxl/pmem.c
+++ b/drivers/cxl/pmem.c
@@ -377,6 +377,7 @@ static int cxl_pmem_region_probe(struct device *dev)
struct nd_mapping_desc mappings[CXL_DECODER_MAX_INTERLEAVE];
struct cxl_pmem_region *cxlr_pmem = to_cxl_pmem_region(dev);
struct cxl_region *cxlr = cxlr_pmem->cxlr;
+ struct cxl_region_params *p = &cxlr->params;
struct cxl_nvdimm_bridge *cxl_nvb = cxlr->cxl_nvb;
struct cxl_pmem_region_info *info = NULL;
struct nd_interleave_set *nd_set;
@@ -465,12 +466,12 @@ static int cxl_pmem_region_probe(struct device *dev)
ndr_desc.num_mappings = cxlr_pmem->nr_mappings;
ndr_desc.mapping = mappings;

- /*
- * TODO enable CXL labels which skip the need for 'interleave-set cookie'
- */
- nd_set->cookie1 =
- nd_fletcher64(info, sizeof(*info) * cxlr_pmem->nr_mappings, 0);
- nd_set->cookie2 = nd_set->cookie1;
+ nd_set->uuid = p->uuid;
+ nd_set->interleave_ways = p->interleave_ways;
+ nd_set->interleave_granularity = p->interleave_granularity;
+ nd_set->res = p->res;
+ nd_set->nr_targets = p->nr_targets;
+
ndr_desc.nd_set = nd_set;

cxlr_pmem->nd_region =
--
2.34.1