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Tue, 17 Jun 2025 12:40:11 +0000 (GMT) From: Neeraj Kumar To: dan.j.williams@intel.com, dave@stgolabs.net, jonathan.cameron@huawei.com, dave.jiang@intel.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com Cc: a.manzanares@samsung.com, nifan.cxl@gmail.com, anisa.su@samsung.com, vishak.g@samsung.com, krish.reddy@samsung.com, arun.george@samsung.com, alok.rathore@samsung.com, s.neeraj@samsung.com, neeraj.kernel@gmail.com, linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, gost.dev@samsung.com, cpgs@samsung.com Subject: [RFC PATCH 03/20] nvdimm/namespace_label: Add namespace label changes as per CXL LSA v2.1 Date: Tue, 17 Jun 2025 18:09:27 +0530 Message-Id: <1279309678.121750165204255.JavaMail.epsvc@epcpadp1new> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250617123944.78345-1-s.neeraj@samsung.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20250617124013epcas5p3c241c626448fcf7851a100fdf2816160 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20250617124013epcas5p3c241c626448fcf7851a100fdf2816160 References: <20250617123944.78345-1-s.neeraj@samsung.com> CXL 3.2 Spec mentions CXL LSA 2.1 Namespace Labels at section 9.13.2.5 Modified __pmem_label_update function using setter functions to update namespace label as per CXL LSA 2.1 Signed-off-by: Neeraj Kumar --- drivers/nvdimm/label.c | 3 +++ drivers/nvdimm/nd.h | 27 +++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 30bccad98939..d5cfaa99f976 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -923,6 +923,7 @@ static int __pmem_label_update(struct nd_region *nd_region, memset(nd_label, 0, sizeof_namespace_label(ndd)); ns_label = &nd_label->ns_label; + nsl_set_type(ndd, ns_label); nsl_set_uuid(ndd, ns_label, nspm->uuid); nsl_set_name(ndd, ns_label, nspm->alt_name); nsl_set_flags(ndd, ns_label, flags); @@ -934,7 +935,9 @@ static int __pmem_label_update(struct nd_region *nd_region, nsl_set_lbasize(ndd, ns_label, nspm->lbasize); nsl_set_dpa(ndd, ns_label, res->start); nsl_set_slot(ndd, ns_label, slot); + nsl_set_alignment(ndd, ns_label, 0); nsl_set_type_guid(ndd, ns_label, &nd_set->type_guid); + nsl_set_region_uuid(ndd, ns_label, NULL); nsl_set_claim_class(ndd, ns_label, ndns->claim_class); nsl_calculate_checksum(ndd, ns_label); nd_dbg_dpa(nd_region, ndd, res, "\n"); diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 2ead96ac598b..07d665f18bf6 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -295,6 +295,33 @@ static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd, return nd_label->efi.uuid; } +static inline void nsl_set_type(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *ns_label) +{ + uuid_t tmp; + + if (ndd->cxl) { + uuid_parse(CXL_NAMESPACE_UUID, &tmp); + export_uuid(ns_label->cxl.type, &tmp); + } +} + +static inline void nsl_set_alignment(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *ns_label, + u32 align) +{ + if (ndd->cxl) + ns_label->cxl.align = __cpu_to_le16(align); +} + +static inline void nsl_set_region_uuid(struct nvdimm_drvdata *ndd, + struct nd_namespace_label *ns_label, + const uuid_t *uuid) +{ + if (ndd->cxl) + export_uuid(ns_label->cxl.region_uuid, uuid); +} + bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, guid_t *guid); enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd, -- 2.34.1