From patchwork Wed Jan 31 19:45:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 10194739 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A72D5603EE for ; Wed, 31 Jan 2018 19:45:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6DFC128683 for ; Wed, 31 Jan 2018 19:45:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 62DE32871A; Wed, 31 Jan 2018 19:45:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 77D8028683 for ; Wed, 31 Jan 2018 19:45:52 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 18D8A2238B5A9; Wed, 31 Jan 2018 11:40:16 -0800 (PST) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.136; helo=mga12.intel.com; envelope-from=dave.jiang@intel.com; receiver=linux-nvdimm@lists.01.org Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 671BE2238B5A3 for ; Wed, 31 Jan 2018 11:40:14 -0800 (PST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Jan 2018 11:45:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,441,1511856000"; d="scan'208";a="27821188" Received: from djiang5-desk3.ch.intel.com ([143.182.136.93]) by orsmga001.jf.intel.com with ESMTP; 31 Jan 2018 11:45:49 -0800 Subject: [PATCH v5 3/4] libnvdimm: expose platform persistence attribute for nd_region From: Dave Jiang To: dan.j.williams@intel.com, ross.zwisler@linux.intel.com Date: Wed, 31 Jan 2018 12:45:49 -0700 Message-ID: <151742794970.53525.17251272455889886797.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <151742786907.53525.180738048776121385.stgit@djiang5-desk3.ch.intel.com> References: <151742786907.53525.180738048776121385.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-acpi@vger.kernel.org, linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Providing a sysfs attribute for nd_region that shows the persistence capabilities for the platform. Signed-off-by: Dave Jiang Reviewed-by: Ross Zwisler --- drivers/nvdimm/region_devs.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index abaf38c61220..e6d01911e092 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -528,6 +528,18 @@ static ssize_t resource_show(struct device *dev, } static DEVICE_ATTR_RO(resource); +static ssize_t persistence_domain_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nd_region *nd_region = to_nd_region(dev); + unsigned long flags = nd_region->flags; + + return sprintf(buf, "%s%s\n", + flags & BIT(ND_REGION_PERSIST_CACHE) ? "cpu_cache " : "", + flags & BIT(ND_REGION_PERSIST_MEMCTRL) ? "memory_controller " : ""); +} +static DEVICE_ATTR_RO(persistence_domain); + static struct attribute *nd_region_attributes[] = { &dev_attr_size.attr, &dev_attr_nstype.attr, @@ -543,6 +555,7 @@ static struct attribute *nd_region_attributes[] = { &dev_attr_init_namespaces.attr, &dev_attr_badblocks.attr, &dev_attr_resource.attr, + &dev_attr_persistence_domain.attr, NULL, };