From patchwork Wed Oct 7 00:10:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russ Weight X-Patchwork-Id: 11819415 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 01E9C139F for ; Wed, 7 Oct 2020 00:10:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E7D8F20739 for ; Wed, 7 Oct 2020 00:10:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726881AbgJGAKh (ORCPT ); Tue, 6 Oct 2020 20:10:37 -0400 Received: from mga04.intel.com ([192.55.52.120]:3648 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726785AbgJGAKg (ORCPT ); Tue, 6 Oct 2020 20:10:36 -0400 IronPort-SDR: cbhl2ioKtc4rj6oK4UybUmhtrZwprQu1ZkHRUraejLEeu1JgwEZzkwHz0X2OrBNhxiGAkJ43Pv +iexqpJdxzAA== X-IronPort-AV: E=McAfee;i="6000,8403,9766"; a="162139583" X-IronPort-AV: E=Sophos;i="5.77,344,1596524400"; d="scan'208";a="162139583" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2020 17:10:34 -0700 IronPort-SDR: zn3yGGU7+0ViMsUHdigM7lrjjOTKsItscjkdDtgDttFzRFfoXKIoDzDqz8khawr1CEHkL9FNpb KiRlBLKgEnQA== X-IronPort-AV: E=Sophos;i="5.77,344,1596524400"; d="scan'208";a="297380466" Received: from rhweight-mobl2.amr.corp.intel.com (HELO rhweight-mobl2.ra.intel.com) ([10.212.2.223]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2020 17:10:33 -0700 From: Russ Weight To: mdf@kernel.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 v3 5/7] fpga: sec-mgr: expose sec-mgr update size Date: Tue, 6 Oct 2020 17:10:02 -0700 Message-Id: <20201007001004.23790-6-russell.h.weight@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201007001004.23790-1-russell.h.weight@intel.com> References: <20201007001004.23790-1-russell.h.weight@intel.com> 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: Tom Rix --- v3: - No change v2: - Bumped documentation date and version --- 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 1f9f2c215e0c..ec51135fcb6a 100644 --- a/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr +++ b/Documentation/ABI/testing/sysfs-class-ifpga-sec-mgr @@ -90,6 +90,17 @@ 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: Oct 2020 +KernelVersion: 5.11 +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: Oct 2020 KernelVersion: 5.11 diff --git a/drivers/fpga/ifpga-sec-mgr.c b/drivers/fpga/ifpga-sec-mgr.c index a45907b756bf..d4fa5d60fa02 100644 --- a/drivers/fpga/ifpga-sec-mgr.c +++ b/drivers/fpga/ifpga-sec-mgr.c @@ -348,6 +348,15 @@ 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) { @@ -384,6 +393,7 @@ 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, };