From patchwork Fri Sep 4 23:53:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russ Weight X-Patchwork-Id: 11758721 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3B6CB925 for ; Fri, 4 Sep 2020 23:53:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C288208C7 for ; Fri, 4 Sep 2020 23:53:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728326AbgIDXxx (ORCPT ); Fri, 4 Sep 2020 19:53:53 -0400 Received: from mga06.intel.com ([134.134.136.31]:64701 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728140AbgIDXxW (ORCPT ); Fri, 4 Sep 2020 19:53:22 -0400 IronPort-SDR: doP+68r8rgUHiqkTlLIKyXDHSIc0o/wMYYCgPJ+9Blgky4T1XmdO39kIBVJ+KM7/f9+zxpzRox xobsD8KGzwxw== X-IronPort-AV: E=McAfee;i="6000,8403,9734"; a="219386211" X-IronPort-AV: E=Sophos;i="5.76,391,1592895600"; d="scan'208";a="219386211" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2020 16:53:19 -0700 IronPort-SDR: Gz2Iu1HvC9zc10GPl92UMGLimuHP7T6K2IGDJelknZg+t6pCwhI37rnZyCH3L9sP7Y8C8TRtd+ /5dNMnGjya6A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,391,1592895600"; d="scan'208";a="284656440" Received: from rhweight-mobl2.amr.corp.intel.com (HELO rhweight-mobl2.ra.intel.com) ([10.251.151.80]) by fmsmga008.fm.intel.com with ESMTP; 04 Sep 2020 16:53:18 -0700 From: Russ Weight To: mdf@kernel.org, lee.jones@linaro.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, lgoncalv@redhat.com, yilun.xu@intel.com, hao.wu@intel.com, matthew.gerlach@intel.com, Russ Weight Subject: [PATCH v1 09/12] fpga: expose sec-mgr update size Date: Fri, 4 Sep 2020 16:53:02 -0700 Message-Id: <20200904235305.6254-10-russell.h.weight@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200904235305.6254-1-russell.h.weight@intel.com> References: <20200904235305.6254-1-russell.h.weight@intel.com> Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org Extend the Intel Security Manager class driver to include an update/remaining_size sysfs node that can be read to determine how much data remains to be transferred to the secure update engine. This file can be used to monitor progress during the "writing" phase of an update. Signed-off-by: Russ Weight Reviewed-by: Wu Hao Reviewed-by: Tom Rix --- Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr | 11 +++++++++++ drivers/fpga/ifpga-sec-mgr.c | 10 ++++++++++ 2 files changed, 21 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr b/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr index e7b1b02bf7ee..cf1967f1b3e3 100644 --- a/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr +++ b/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr @@ -98,6 +98,17 @@ Description: Read-only. Returns a string describing the current as it will be signaled by sysfs_notify() on each state change. +What: /sys/class/ifpga_sec_mgr/ifpga_secX/update/remaining_size +Date: Sep 2020 +KernelVersion: 5.10 +Contact: Russ Weight +Description: Read-only. Returns the size of data that remains to + be written to the secure update engine. The size + value is initialized to the full size of the file + image and the value is updated periodically during + the "writing" phase of the update. + Format: "%u". + What: /sys/class/ifpga_sec_mgr/ifpga_secX/update/error Date: Sep 2020 KernelVersion: 5.10 diff --git a/drivers/fpga/ifpga-sec-mgr.c b/drivers/fpga/ifpga-sec-mgr.c index a7718bd8ee61..4ca5d13e5656 100644 --- a/drivers/fpga/ifpga-sec-mgr.c +++ b/drivers/fpga/ifpga-sec-mgr.c @@ -325,6 +325,15 @@ error_show(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR_RO(error); +static ssize_t remaining_size_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ifpga_sec_mgr *imgr = to_sec_mgr(dev); + + return sprintf(buf, "%u\n", imgr->remaining_size); +} +static DEVICE_ATTR_RO(remaining_size); + static ssize_t filename_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { @@ -364,6 +373,7 @@ static struct attribute *sec_mgr_update_attrs[] = { &dev_attr_filename.attr, &dev_attr_status.attr, &dev_attr_error.attr, + &dev_attr_remaining_size.attr, NULL, };