From patchwork Thu Nov 11 20:44:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Verma, Vishal L" X-Patchwork-Id: 12615629 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 3C2B22CA2 for ; Thu, 11 Nov 2021 20:44:59 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10165"; a="233253834" X-IronPort-AV: E=Sophos;i="5.87,226,1631602800"; d="scan'208";a="233253834" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2021 12:44:55 -0800 X-IronPort-AV: E=Sophos;i="5.87,226,1631602800"; d="scan'208";a="504579078" Received: from dmamols-mobl1.amr.corp.intel.com (HELO vverma7-desk.amr.corp.intel.com) ([10.255.92.53]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2021 12:44:55 -0800 From: Vishal Verma To: Cc: Dan Williams , Ben Widawsky , , Vishal Verma Subject: [ndctl PATCH v5 09/16] libcxl: add label_size to cxl_memdev, and an API to retrieve it Date: Thu, 11 Nov 2021 13:44:29 -0700 Message-Id: <20211111204436.1560365-10-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211111204436.1560365-1-vishal.l.verma@intel.com> References: <20211111204436.1560365-1-vishal.l.verma@intel.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2659; h=from:subject; bh=5YV7bznFT8CiW378WMH3ttwGTr9y5KQcVzO9zFliIEA=; b=owGbwMvMwCHGf25diOft7jLG02pJDIm9DZum5J73X1Lv8uB45bJdgr9XHv6cpTbBNdz/rdGd5SUu 0oq/OkpZGMQ4GGTFFFn+7vnIeExuez5PYIIjzBxWJpAhDFycAjCRx8aMDKv28SQyszMwB/w3aaz/Kr Dkxub+D/amS17fWndlb4LPaWeGv1JZDkKf+O13H2g+03jlzGbrOsbpCdapD4VcXQSWe9XzswMA X-Developer-Key: i=vishal.l.verma@intel.com; a=openpgp; fpr=F8682BE134C67A12332A2ED07AFA61BEA3B84DFF Size of the Label Storage Area (LSA) is available as a sysfs attribute called 'label_storage_size'. Add that to libcxl's memdev so that it is available for label related commands. Cc: Dan Williams Reviewed-by: Dan Williams Signed-off-by: Vishal Verma --- cxl/lib/private.h | 1 + cxl/lib/libcxl.c | 12 ++++++++++++ cxl/libcxl.h | 1 + cxl/lib/libcxl.sym | 1 + 4 files changed, 15 insertions(+) diff --git a/cxl/lib/private.h b/cxl/lib/private.h index bf3a897..c4ed741 100644 --- a/cxl/lib/private.h +++ b/cxl/lib/private.h @@ -21,6 +21,7 @@ struct cxl_memdev { unsigned long long pmem_size; unsigned long long ram_size; int payload_max; + size_t lsa_size; struct kmod_module *module; }; diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index 76913a2..def3a97 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -247,6 +247,13 @@ static void *add_cxl_memdev(void *parent, int id, const char *cxlmem_base) if (memdev->payload_max < 0) goto err_read; + sprintf(path, "%s/label_storage_size", cxlmem_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + goto err_read; + memdev->lsa_size = strtoull(buf, NULL, 0); + if (memdev->lsa_size == ULLONG_MAX) + goto err_read; + memdev->dev_path = strdup(cxlmem_base); if (!memdev->dev_path) goto err_read; @@ -350,6 +357,11 @@ CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev return memdev->firmware_version; } +CXL_EXPORT size_t cxl_memdev_get_label_size(struct cxl_memdev *memdev) +{ + return memdev->lsa_size; +} + CXL_EXPORT void cxl_cmd_unref(struct cxl_cmd *cmd) { if (!cmd) diff --git a/cxl/libcxl.h b/cxl/libcxl.h index 7408745..d3b97a1 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -42,6 +42,7 @@ struct cxl_ctx *cxl_memdev_get_ctx(struct cxl_memdev *memdev); unsigned long long cxl_memdev_get_pmem_size(struct cxl_memdev *memdev); unsigned long long cxl_memdev_get_ram_size(struct cxl_memdev *memdev); const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev); +size_t cxl_memdev_get_label_size(struct cxl_memdev *memdev); #define cxl_memdev_foreach(ctx, memdev) \ for (memdev = cxl_memdev_get_first(ctx); \ diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index 629322c..858e953 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -64,6 +64,7 @@ global: cxl_cmd_health_info_get_pmem_errors; cxl_cmd_new_read_label; cxl_cmd_read_label_get_payload; + cxl_memdev_get_label_size; local: *; };