From patchwork Thu Sep 9 05:11:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12482445 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) (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 6286872 for ; Thu, 9 Sep 2021 05:11:59 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10101"; a="281695844" X-IronPort-AV: E=Sophos;i="5.85,279,1624345200"; d="scan'208";a="281695844" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Sep 2021 22:11:59 -0700 X-IronPort-AV: E=Sophos;i="5.85,279,1624345200"; d="scan'208";a="469914922" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Sep 2021 22:11:59 -0700 Subject: [PATCH v4 05/21] libnvdimm/label: Define CXL region labels From: Dan Williams To: linux-cxl@vger.kernel.org Cc: Jonathan Cameron , Jonathan Cameron , vishal.l.verma@intel.com, nvdimm@lists.linux.dev, ben.widawsky@intel.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, Jonathan.Cameron@huawei.com Date: Wed, 08 Sep 2021 22:11:58 -0700 Message-ID: <163116431893.2460985.4003511000574373922.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <163116429183.2460985.5040982981112374615.stgit@dwillia2-desk3.amr.corp.intel.com> References: <163116429183.2460985.5040982981112374615.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 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 Reviewed-by: Jonathan Cameron Signed-off-by: Dan Williams --- drivers/nvdimm/label.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 7fa757d47846..0519aacc2926 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -66,6 +66,38 @@ struct nd_namespace_index { u8 free[]; }; +/** + * 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