From patchwork Wed Jun 1 21:41:27 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winkler, Tomas" X-Patchwork-Id: 9148383 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 B200B600BC for ; Wed, 1 Jun 2016 22:00:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A4F1C2714B for ; Wed, 1 Jun 2016 22:00:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 99A7427151; Wed, 1 Jun 2016 22:00:01 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3EB3F2714B for ; Wed, 1 Jun 2016 22:00:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750867AbcFAVmP (ORCPT ); Wed, 1 Jun 2016 17:42:15 -0400 Received: from mga03.intel.com ([134.134.136.65]:42955 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751978AbcFAVmM (ORCPT ); Wed, 1 Jun 2016 17:42:12 -0400 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP; 01 Jun 2016 14:42:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,403,1459839600"; d="scan'208";a="114398645" Received: from twinkler-lnx.jer.intel.com ([10.12.87.167]) by fmsmga004.fm.intel.com with ESMTP; 01 Jun 2016 14:42:07 -0700 From: Tomas Winkler To: Greg Kroah-Hartman , Ulf Hansson , Adrian Hunter , James Bottomley , "Martin K. Petersen" , Vinayak Holikatti , Andy Lutomirski , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Michael Ryleev , Joao Pinto , Christoph Hellwig , Yaniv Gardi Cc: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, Tomas Winkler Subject: [PATCH v4 3/8] char: rpmb: add device attributes Date: Wed, 1 Jun 2016 17:41:27 -0400 Message-Id: <1464817292-5407-4-git-send-email-tomas.winkler@intel.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1464817292-5407-1-git-send-email-tomas.winkler@intel.com> References: <1464817292-5407-1-git-send-email-tomas.winkler@intel.com> Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add attribute type that displays underlay storage type technology EMMC, UFS, and attribute id, that displays underlay storage device id. For EMMC this would be content of CID and for UFS serial number from the device descriptor. V2: resend V3: set the kernel version to 4.7 V4: set the kernel version to 4.8 Signed-off-by: Tomas Winkler --- Documentation/ABI/testing/sysfs-class-rpmb | 24 +++++++++++ drivers/char/rpmb/core.c | 64 ++++++++++++++++++++++++++++++ 2 files changed, 88 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-rpmb b/Documentation/ABI/testing/sysfs-class-rpmb index 44ee4d31dc0b..e9027f37ca5b 100644 --- a/Documentation/ABI/testing/sysfs-class-rpmb +++ b/Documentation/ABI/testing/sysfs-class-rpmb @@ -18,3 +18,27 @@ Contact: Tomas Winkler Description: The /sys/class/rpmb/rpmbN directory is created for each RPMB registered device + +What: /sys/class/rpmb/rpmbN/id +Date: Maj 2016 +KernelVersion: 4.7 +Contact: Tomas Winkler +Description: + The /sys/class/rpmb/rpmbN/id file contains device id + in a binary form + +What: /sys/class/rpmb/rpmbN/type +Date: Jun 2016 +KernelVersion: 4.8 +Contact: Tomas Winkler +Description: + The /sys/class/rpmb/rpmbN/type file contains device + underlay storage type technology: EMMC, UFS + +What: /sys/class/rpmb/rpmbN/reliable_wr_cnt +Date: Jun 2016 +KernelVersion: 4.8 +Contact: Tomas Winkler +Description: + The /sys/class/rpmb/rpmbN/reliable_wr_cnt file contains + number of blocks that can be written in a single request diff --git a/drivers/char/rpmb/core.c b/drivers/char/rpmb/core.c index c9ea30aca6be..fb401331d345 100644 --- a/drivers/char/rpmb/core.c +++ b/drivers/char/rpmb/core.c @@ -230,6 +230,68 @@ struct rpmb_dev *rpmb_dev_find_by_device(struct device *parent) } EXPORT_SYMBOL_GPL(rpmb_dev_find_by_device); +static ssize_t type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct rpmb_dev *rdev = to_rpmb_dev(dev); + ssize_t ret; + + switch (rdev->ops->type) { + case RPMB_TYPE_EMMC: + ret = scnprintf(buf, PAGE_SIZE, "EMMC\n"); + break; + case RPMB_TYPE_UFS: + ret = scnprintf(buf, PAGE_SIZE, "UFS\n"); + break; + default: + ret = scnprintf(buf, PAGE_SIZE, "UNKNOWN\n"); + break; + } + + return ret; +} +static DEVICE_ATTR_RO(type); + +static ssize_t id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct rpmb_dev *rdev = to_rpmb_dev(dev); + size_t sz = min_t(size_t, rdev->ops->dev_id_len, PAGE_SIZE); + + if (!rdev->ops->dev_id) + return 0; + + memcpy(buf, rdev->ops->dev_id, sz); + return sz; +} +static DEVICE_ATTR_RO(id); + +static ssize_t reliable_wr_cnt_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct rpmb_dev *rdev = to_rpmb_dev(dev); + + return scnprintf(buf, PAGE_SIZE, "%u\n", rdev->ops->reliable_wr_cnt); +} +static DEVICE_ATTR_RO(reliable_wr_cnt); + + +static struct attribute *rpmb_attrs[] = { + &dev_attr_type.attr, + &dev_attr_id.attr, + &dev_attr_reliable_wr_cnt.attr, + NULL, +}; + +static struct attribute_group rpmb_attr_group = { + .attrs = rpmb_attrs, +}; + +static const struct attribute_group *rpmb_attr_groups[] = { + &rpmb_attr_group, + NULL +}; + /** * rpmb_dev_unregister - unregister RPMB partition from the RPMB subsystem * @@ -300,6 +362,8 @@ struct rpmb_dev *rpmb_dev_register(struct device *dev, dev_set_name(&rdev->dev, "rpmb%d", id); rdev->dev.class = &rpmb_class; rdev->dev.parent = dev; + rdev->dev.groups = rpmb_attr_groups; + ret = device_register(&rdev->dev); if (ret) goto exit;