From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 845383FCC for ; Tue, 24 Aug 2021 16:08:54 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10086"; a="215501970" X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="215501970" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 09:06:42 -0700 X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="685419952" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 09:06:41 -0700 Subject: [PATCH v3 14/28] libnvdimm/labels: Introduce CXL labels From: Dan Williams To: linux-cxl@vger.kernel.org Cc: Jonathan Cameron , vishal.l.verma@intel.com, alison.schofield@intel.com, nvdimm@lists.linux.dev, Jonathan.Cameron@huawei.com, ira.weiny@intel.com, ben.widawsky@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com Date: Tue, 24 Aug 2021 09:06:41 -0700 Message-ID: <162982120115.1124374.30709335221651520.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <162982112370.1124374.2020303588105269226.stgit@dwillia2-desk3.amr.corp.intel.com> References: <162982112370.1124374.2020303588105269226.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-3-g996c Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Now that all of use sites of label data have been converted to nsl_* helpers, introduce the CXL label format. The ->cxl flag in nvdimm_drvdata indicates the label format the device expects. A follow-on patch allows a bus provider to select the label style. Reviewed-by: Jonathan Cameron Signed-off-by: Dan Williams --- drivers/nvdimm/label.c | 54 +++++++++++++------ drivers/nvdimm/label.h | 108 ++++++++++++++++++++++++++------------ drivers/nvdimm/nd.h | 135 +++++++++++++++++++++++++++++++++++++----------- 3 files changed, 216 insertions(+), 81 deletions(-) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 7abeb1233404..5ec9a4023df9 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -22,6 +22,9 @@ static uuid_t nvdimm_btt2_uuid; static uuid_t nvdimm_pfn_uuid; static uuid_t nvdimm_dax_uuid; +static uuid_t cxl_region_uuid; +static uuid_t cxl_namespace_uuid; + static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0"; static u32 best_seq(u32 a, u32 b) @@ -357,7 +360,7 @@ static bool nsl_validate_checksum(struct nvdimm_drvdata *ndd, { u64 sum, sum_save; - if (!namespace_label_has(ndd, checksum)) + if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) return true; sum_save = nsl_get_checksum(ndd, nd_label); @@ -372,7 +375,7 @@ static void nsl_calculate_checksum(struct nvdimm_drvdata *ndd, { u64 sum; - if (!namespace_label_has(ndd, checksum)) + if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) return; nsl_set_checksum(ndd, nd_label, 0); sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); @@ -785,7 +788,6 @@ static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, } /* CXL labels store UUIDs instead of GUIDs for the same data */ -__maybe_unused static const uuid_t *to_abstraction_uuid(enum nvdimm_claim_class claim_class, uuid_t *target) { @@ -821,18 +823,18 @@ static void reap_victim(struct nd_mapping *nd_mapping, static void nsl_set_type_guid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, guid_t *guid) { - if (namespace_label_has(ndd, type_guid)) - guid_copy(&nd_label->type_guid, guid); + if (efi_namespace_label_has(ndd, type_guid)) + guid_copy(&nd_label->efi.type_guid, guid); } bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, guid_t *guid) { - if (!namespace_label_has(ndd, type_guid)) + if (ndd->cxl || !efi_namespace_label_has(ndd, type_guid)) return true; - if (!guid_equal(&nd_label->type_guid, guid)) { + if (!guid_equal(&nd_label->efi.type_guid, guid)) { dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", guid, - &nd_label->type_guid); + &nd_label->efi.type_guid); return false; } return true; @@ -842,19 +844,34 @@ static void nsl_set_claim_class(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, enum nvdimm_claim_class claim_class) { - if (!namespace_label_has(ndd, abstraction_guid)) + if (ndd->cxl) { + uuid_t uuid; + + import_uuid(&uuid, nd_label->cxl.abstraction_uuid); + export_uuid(nd_label->cxl.abstraction_uuid, + to_abstraction_uuid(claim_class, &uuid)); + return; + } + + if (!efi_namespace_label_has(ndd, abstraction_guid)) return; - guid_copy(&nd_label->abstraction_guid, + guid_copy(&nd_label->efi.abstraction_guid, to_abstraction_guid(claim_class, - &nd_label->abstraction_guid)); + &nd_label->efi.abstraction_guid)); } enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - if (!namespace_label_has(ndd, abstraction_guid)) + if (ndd->cxl) { + uuid_t uuid; + + import_uuid(&uuid, nd_label->cxl.abstraction_uuid); + return uuid_to_nvdimm_cclass(&uuid); + } + if (!efi_namespace_label_has(ndd, abstraction_guid)) return NVDIMM_CCLASS_NONE; - return guid_to_nvdimm_cclass(&nd_label->abstraction_guid); + return guid_to_nvdimm_cclass(&nd_label->efi.abstraction_guid); } static int __pmem_label_update(struct nd_region *nd_region, @@ -987,7 +1004,7 @@ static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 isetcookie) { - if (namespace_label_has(ndd, type_guid)) { + if (efi_namespace_label_has(ndd, type_guid)) { nsl_set_isetcookie(ndd, nd_label, isetcookie); return; } @@ -998,7 +1015,7 @@ bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 isetcookie) { - if (!namespace_label_has(ndd, type_guid)) + if (!efi_namespace_label_has(ndd, type_guid)) return true; if (nsl_get_isetcookie(ndd, nd_label) != isetcookie) { @@ -1014,7 +1031,7 @@ static void nsl_set_blk_nlabel(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, int nlabel, bool first) { - if (!namespace_label_has(ndd, type_guid)) { + if (!efi_namespace_label_has(ndd, type_guid)) { nsl_set_nlabel(ndd, nd_label, 0); /* N/A */ return; } @@ -1025,7 +1042,7 @@ static void nsl_set_blk_position(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, bool first) { - if (!namespace_label_has(ndd, type_guid)) { + if (!efi_namespace_label_has(ndd, type_guid)) { nsl_set_position(ndd, nd_label, 0); return; } @@ -1440,5 +1457,8 @@ int __init nd_label_init(void) WARN_ON(uuid_parse(NVDIMM_PFN_GUID, &nvdimm_pfn_uuid)); WARN_ON(uuid_parse(NVDIMM_DAX_GUID, &nvdimm_dax_uuid)); + WARN_ON(uuid_parse(CXL_REGION_UUID, &cxl_region_uuid)); + WARN_ON(uuid_parse(CXL_NAMESPACE_UUID, &cxl_namespace_uuid)); + return 0; } diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 76ecd0347dc2..0ef2e20fce57 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -95,41 +95,78 @@ struct cxl_region_label { __le64 checksum; }; -/** - * struct nd_namespace_label - namespace superblock - * @uuid: UUID per RFC 4122 - * @name: optional name (NULL-terminated) - * @flags: see NSLABEL_FLAG_* - * @nlabel: num labels to describe this ns - * @position: labels position in set - * @isetcookie: interleave set cookie - * @lbasize: LBA size in bytes or 0 for pmem - * @dpa: DPA of NVM range on this DIMM - * @rawsize: size of namespace - * @slot: slot of this label in label area - * @unused: must be zero - */ struct nd_namespace_label { - u8 uuid[NSLABEL_UUID_LEN]; - u8 name[NSLABEL_NAME_LEN]; - __le32 flags; - __le16 nlabel; - __le16 position; - __le64 isetcookie; - __le64 lbasize; - __le64 dpa; - __le64 rawsize; - __le32 slot; - /* - * Accessing fields past this point should be gated by a - * namespace_label_has() check. - */ - u8 align; - u8 reserved[3]; - guid_t type_guid; - guid_t abstraction_guid; - u8 reserved2[88]; - __le64 checksum; + union { + /** + * 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 + * @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; + } cxl; + /** + * struct nvdimm_efi_label - namespace superblock + * @uuid: UUID per RFC 4122 + * @name: optional name (NULL-terminated) + * @flags: see NSLABEL_FLAG_* + * @nlabel: interleave set width + * @position: this label's position in the set + * @isetcookie: interleave set cookie + * @lbasize: address geometry for disk-like personalities + * @dpa: start address in device-local capacity for this label + * @rawsize: size of namespace + * @slot: slot id of this label in label area + */ + struct nvdimm_efi_label { + u8 uuid[NSLABEL_UUID_LEN]; + u8 name[NSLABEL_NAME_LEN]; + __le32 flags; + __le16 nlabel; + __le16 position; + __le64 isetcookie; + __le64 lbasize; + __le64 dpa; + __le64 rawsize; + __le32 slot; + /* + * Accessing fields past this point should be + * gated by a efi_namespace_label_has() check. + */ + u8 align; + u8 reserved[3]; + guid_t type_guid; + guid_t abstraction_guid; + u8 reserved2[88]; + __le64 checksum; + } efi; + }; }; #define NVDIMM_BTT_GUID "8aed63a2-29a2-4c66-8b12-f05d15d3922a" @@ -137,6 +174,9 @@ struct nd_namespace_label { #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}-" diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index d57f95a48fe1..6f8ce114032d 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -30,6 +30,7 @@ struct nvdimm_drvdata { int nslabel_size; struct nd_cmd_get_config_size nsarea; void *data; + bool cxl; int ns_current, ns_next; struct resource dpa; struct kref kref; @@ -38,13 +39,17 @@ struct nvdimm_drvdata { static inline const u8 *nsl_ref_name(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return nd_label->name; + if (ndd->cxl) + return nd_label->cxl.name; + return nd_label->efi.name; } static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u8 *name) { - return memcpy(name, nd_label->name, NSLABEL_NAME_LEN); + if (ndd->cxl) + return memcpy(name, nd_label->cxl.name, NSLABEL_NAME_LEN); + return memcpy(name, nd_label->efi.name, NSLABEL_NAME_LEN); } static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd, @@ -52,122 +57,168 @@ static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd, { if (!name) return NULL; - return memcpy(nd_label->name, name, NSLABEL_NAME_LEN); + if (ndd->cxl) + return memcpy(nd_label->cxl.name, name, NSLABEL_NAME_LEN); + return memcpy(nd_label->efi.name, name, NSLABEL_NAME_LEN); } static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le32_to_cpu(nd_label->slot); + if (ndd->cxl) + return __le32_to_cpu(nd_label->cxl.slot); + return __le32_to_cpu(nd_label->efi.slot); } static inline void nsl_set_slot(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u32 slot) { - nd_label->slot = __cpu_to_le32(slot); + if (ndd->cxl) + nd_label->cxl.slot = __cpu_to_le32(slot); + else + nd_label->efi.slot = __cpu_to_le32(slot); } static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le64_to_cpu(nd_label->checksum); + if (ndd->cxl) + return __le64_to_cpu(nd_label->cxl.checksum); + return __le64_to_cpu(nd_label->efi.checksum); } static inline void nsl_set_checksum(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 checksum) { - nd_label->checksum = __cpu_to_le64(checksum); + if (ndd->cxl) + nd_label->cxl.checksum = __cpu_to_le64(checksum); + else + nd_label->efi.checksum = __cpu_to_le64(checksum); } static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le32_to_cpu(nd_label->flags); + if (ndd->cxl) + return __le32_to_cpu(nd_label->cxl.flags); + return __le32_to_cpu(nd_label->efi.flags); } static inline void nsl_set_flags(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u32 flags) { - nd_label->flags = __cpu_to_le32(flags); + if (ndd->cxl) + nd_label->cxl.flags = __cpu_to_le32(flags); + else + nd_label->efi.flags = __cpu_to_le32(flags); } static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le64_to_cpu(nd_label->dpa); + if (ndd->cxl) + return __le64_to_cpu(nd_label->cxl.dpa); + return __le64_to_cpu(nd_label->efi.dpa); } static inline void nsl_set_dpa(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 dpa) { - nd_label->dpa = __cpu_to_le64(dpa); + if (ndd->cxl) + nd_label->cxl.dpa = __cpu_to_le64(dpa); + else + nd_label->efi.dpa = __cpu_to_le64(dpa); } static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le64_to_cpu(nd_label->rawsize); + if (ndd->cxl) + return __le64_to_cpu(nd_label->cxl.rawsize); + return __le64_to_cpu(nd_label->efi.rawsize); } static inline void nsl_set_rawsize(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 rawsize) { - nd_label->rawsize = __cpu_to_le64(rawsize); + if (ndd->cxl) + nd_label->cxl.rawsize = __cpu_to_le64(rawsize); + else + nd_label->efi.rawsize = __cpu_to_le64(rawsize); } static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le64_to_cpu(nd_label->isetcookie); + /* WARN future refactor attempts that break this assumption */ + if (dev_WARN_ONCE(ndd->dev, ndd->cxl, + "CXL labels do not use the isetcookie concept\n")) + return 0; + return __le64_to_cpu(nd_label->efi.isetcookie); } static inline void nsl_set_isetcookie(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 isetcookie) { - nd_label->isetcookie = __cpu_to_le64(isetcookie); + if (!ndd->cxl) + nd_label->efi.isetcookie = __cpu_to_le64(isetcookie); } static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 cookie) { - return cookie == __le64_to_cpu(nd_label->isetcookie); + /* + * Let the EFI and CXL validation comingle, where fields that + * don't matter to CXL always validate. + */ + if (ndd->cxl) + return true; + return cookie == __le64_to_cpu(nd_label->efi.isetcookie); } static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le16_to_cpu(nd_label->position); + if (ndd->cxl) + return __le16_to_cpu(nd_label->cxl.position); + return __le16_to_cpu(nd_label->efi.position); } static inline void nsl_set_position(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u16 position) { - nd_label->position = __cpu_to_le16(position); + if (ndd->cxl) + nd_label->cxl.position = __cpu_to_le16(position); + else + nd_label->efi.position = __cpu_to_le16(position); } - static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le16_to_cpu(nd_label->nlabel); + if (ndd->cxl) + return 0; + return __le16_to_cpu(nd_label->efi.nlabel); } static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u16 nlabel) { - nd_label->nlabel = __cpu_to_le16(nlabel); + if (!ndd->cxl) + nd_label->efi.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 */ + if (ndd->cxl) + return __le16_to_cpu(nd_label->cxl.nrange); return 1; } @@ -175,26 +226,40 @@ static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u16 nrange) { + if (ndd->cxl) + nd_label->cxl.nrange = __cpu_to_le16(nrange); } static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return __le64_to_cpu(nd_label->lbasize); + /* + * Yes, for some reason the EFI labels convey a massive 64-bit + * lbasize, that got fixed for CXL. + */ + if (ndd->cxl) + return __le16_to_cpu(nd_label->cxl.lbasize); + return __le64_to_cpu(nd_label->efi.lbasize); } static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, u64 lbasize) { - nd_label->lbasize = __cpu_to_le64(lbasize); + if (ndd->cxl) + nd_label->cxl.lbasize = __cpu_to_le16(lbasize); + else + nd_label->efi.lbasize = __cpu_to_le64(lbasize); } static inline const uuid_t *nsl_get_uuid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, uuid_t *uuid) { - import_uuid(uuid, nd_label->uuid); + if (ndd->cxl) + import_uuid(uuid, nd_label->cxl.uuid); + else + import_uuid(uuid, nd_label->efi.uuid); return uuid; } @@ -202,7 +267,10 @@ static inline const uuid_t *nsl_set_uuid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, const uuid_t *uuid) { - export_uuid(nd_label->uuid, uuid); + if (ndd->cxl) + export_uuid(nd_label->cxl.uuid, uuid); + else + export_uuid(nd_label->efi.uuid, uuid); return uuid; } @@ -212,14 +280,19 @@ static inline bool nsl_uuid_equal(struct nvdimm_drvdata *ndd, { uuid_t tmp; - import_uuid(&tmp, nd_label->uuid); + if (ndd->cxl) + import_uuid(&tmp, nd_label->cxl.uuid); + else + import_uuid(&tmp, nd_label->efi.uuid); return uuid_equal(&tmp, uuid); } static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { - return nd_label->uuid; + if (ndd->cxl) + return nd_label->cxl.uuid; + return nd_label->efi.uuid; } bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd, @@ -278,8 +351,8 @@ static inline struct nd_namespace_index *to_next_namespace_index( unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd); -#define namespace_label_has(ndd, field) \ - (offsetof(struct nd_namespace_label, field) \ +#define efi_namespace_label_has(ndd, field) \ + (!ndd->cxl && offsetof(struct nvdimm_efi_label, field) \ < sizeof_namespace_label(ndd)) #define nd_dbg_dpa(r, d, res, fmt, arg...) \ @@ -359,6 +432,8 @@ static inline bool nsl_validate_nlabel(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label) { + if (ndd->cxl) + return true; return nsl_get_nlabel(ndd, nd_label) == nd_region->ndr_mappings; }