From patchwork Thu Jul 1 20:09:58 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: 12354797 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (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 5DECC2FB7 for ; Thu, 1 Jul 2021 20:10:30 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10032"; a="205606945" X-IronPort-AV: E=Sophos;i="5.83,315,1616482800"; d="scan'208";a="205606945" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2021 13:10:22 -0700 X-IronPort-AV: E=Sophos;i="5.83,315,1616482800"; d="scan'208";a="409271385" Received: from anandvig-mobl.amr.corp.intel.com (HELO vverma7-desk.amr.corp.intel.com) ([10.254.38.85]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2021 13:10:21 -0700 From: Vishal Verma To: , Cc: Dan Williams , Ben Widawsky , Alison Schofield , Ira Weiny , Vishal Verma Subject: [ndctl PATCH v3 14/21] libcxl: add lsa_size to cxl_memdev, and an API to retrieve it Date: Thu, 1 Jul 2021 14:09:58 -0600 Message-Id: <20210701201005.3065299-15-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210701201005.3065299-1-vishal.l.verma@intel.com> References: <20210701201005.3065299-1-vishal.l.verma@intel.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Size of the Label Storage Area (LSA) is available as a sysfs attribute called 'lsa_size'. Add that to libcxl's memdev so that it is available for label related commands. Signed-off-by: Vishal Verma --- cxl/lib/private.h | 1 + cxl/lib/libcxl.c | 12 ++++++++++++ cxl/libcxl.h | 1 + cxl/lib/libcxl.sym | 5 +++++ 4 files changed, 19 insertions(+) diff --git a/cxl/lib/private.h b/cxl/lib/private.h index fb1dd8e..1bce3b5 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 d2c38c9..ae03e03 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -246,6 +246,13 @@ 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; @@ -349,6 +356,11 @@ CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev return memdev->firmware_version; } +CXL_EXPORT size_t cxl_memdev_get_lsa_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 6edbd8d..eeace11 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_lsa_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 2c6193b..a5a1371 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -55,3 +55,8 @@ global: cxl_cmd_new_get_lsa; cxl_cmd_get_lsa_get_payload; } LIBCXL_2; + +LIBCXL_4 { +global: + cxl_memdev_get_lsa_size; +} LIBCXL_3;