From patchwork Tue Aug 24 16:06:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12455429 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (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 A15033FCC for ; Tue, 24 Aug 2021 16:08:35 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10086"; a="281060114" X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="281060114" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 09:06:31 -0700 X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="597633802" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 09:06:30 -0700 Subject: [PATCH v3 12/28] libnvdimm/labels: Introduce the concept of multi-range namespace 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 09:06:29 -0700 Message-ID: <162982118939.1124374.9504087573920499391.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 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 Signed-off-by: Dan Williams Reviewed-by: Jonathan Cameron --- drivers/nvdimm/label.c | 1 + drivers/nvdimm/nd.h | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index e8e0d3e409a2..7abeb1233404 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -901,6 +901,7 @@ static int __pmem_label_update(struct nd_region *nd_region, nsl_set_name(ndd, nd_label, nspm->alt_name); nsl_set_flags(ndd, nd_label, flags); nsl_set_nlabel(ndd, nd_label, nd_region->ndr_mappings); + nsl_set_nrange(ndd, nd_label, 1); nsl_set_position(ndd, nd_label, pos); nsl_set_isetcookie(ndd, nd_label, cookie); nsl_set_rawsize(ndd, nd_label, resource_size(res)); 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) {