From patchwork Wed May 19 14:12:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 443768 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 062ADC43470 for ; Wed, 19 May 2021 14:12:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E035261002 for ; Wed, 19 May 2021 14:12:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353875AbhESOOK (ORCPT ); Wed, 19 May 2021 10:14:10 -0400 Received: from mga06.intel.com ([134.134.136.31]:44091 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347116AbhESOOE (ORCPT ); Wed, 19 May 2021 10:14:04 -0400 IronPort-SDR: t8TwEIXxIvNMHuMbL6HbIn1TRnMYpGT1BPivoN7pG6loUfk5yLSgl8rP5LmlIjBm+JYFPFCT5h 2mlHC3jAdaiQ== X-IronPort-AV: E=McAfee;i="6200,9189,9988"; a="262212441" X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="262212441" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 May 2021 07:12:45 -0700 IronPort-SDR: qwgYwJ55Dy6j5oqu5C77pEbBaMNVAYZSKVFGZtjNLYGd7+tpFtO3FwFcxw88qnCWHVDtzYZGDm OWHJyta9/EXg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="394421818" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga003.jf.intel.com with ESMTP; 19 May 2021 07:12:41 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id B26DE702; Wed, 19 May 2021 17:12:59 +0300 (EEST) From: Mika Westerberg To: linux-usb@vger.kernel.org Cc: Yehezkel Bernat , Michael Jamet , Andreas Noever , Lukas Wunner , "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, Casey G Bowman , Rajmohan Mani , Christian Kellner , Greg Kroah-Hartman , Jonathan Corbet , Mika Westerberg Subject: [PATCH 8/9] thunderbolt: Add WRITE_ONLY and AUTHENTICATE_ONLY NVM operations for retimers Date: Wed, 19 May 2021 17:12:58 +0300 Message-Id: <20210519141259.84839-9-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210519141259.84839-1-mika.westerberg@linux.intel.com> References: <20210519141259.84839-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Rajmohan Mani The same way we support these two operations for USB4 routers we can extend the retimer NVM operations to support retimers also. Signed-off-by: Rajmohan Mani Co-developed-by: Mika Westerberg Signed-off-by: Mika Westerberg --- .../ABI/testing/sysfs-bus-thunderbolt | 2 +- drivers/thunderbolt/retimer.c | 51 ++++++++++++++----- drivers/thunderbolt/tb.h | 2 + drivers/thunderbolt/usb4.c | 15 +++++- 4 files changed, 53 insertions(+), 17 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt index da580b504c87..95c21d6c9a84 100644 --- a/Documentation/ABI/testing/sysfs-bus-thunderbolt +++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt @@ -221,7 +221,7 @@ Description: When new NVM image is written to the non-active NVM and flush it to the storage area. - Writing "3" will authenticate the image that is currently written in the storage area. This is only - supported with USB4 devices. + supported with USB4 devices and retimers. When read holds status of the last authentication operation if an error occurred during the process. This diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c index 05af0feefe84..3aa790aa6500 100644 --- a/drivers/thunderbolt/retimer.c +++ b/drivers/thunderbolt/retimer.c @@ -103,6 +103,7 @@ static int tb_retimer_nvm_validate_and_write(struct tb_retimer *rt) unsigned int image_size, hdr_size; const u8 *buf = rt->nvm->buf; u16 ds_size, device; + int ret; image_size = rt->nvm->buf_data_size; if (image_size < NVM_MIN_SIZE || image_size > NVM_MAX_SIZE) @@ -140,8 +141,25 @@ static int tb_retimer_nvm_validate_and_write(struct tb_retimer *rt) buf += hdr_size; image_size -= hdr_size; - return usb4_port_retimer_nvm_write(rt->port, rt->index, 0, buf, - image_size); + ret = usb4_port_retimer_nvm_write(rt->port, rt->index, 0, buf, + image_size); + if (!ret) + rt->nvm->flushed = true; + + return ret; +} + +static int tb_retimer_nvm_authenticate(struct tb_retimer *rt, bool auth_only) +{ + int ret; + + if (auth_only) { + ret = usb4_port_retimer_nvm_set_offset(rt->port, rt->index, 0); + if (ret) + return ret; + } + + return usb4_port_retimer_nvm_authenticate(rt->port, rt->index); } static ssize_t device_show(struct device *dev, struct device_attribute *attr, @@ -176,8 +194,7 @@ static ssize_t nvm_authenticate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct tb_retimer *rt = tb_to_retimer(dev); - bool val; - int ret; + int val, ret; pm_runtime_get_sync(&rt->dev); @@ -191,7 +208,7 @@ static ssize_t nvm_authenticate_store(struct device *dev, goto exit_unlock; } - ret = kstrtobool(buf, &val); + ret = kstrtoint(buf, 10, &val); if (ret) goto exit_unlock; @@ -199,16 +216,22 @@ static ssize_t nvm_authenticate_store(struct device *dev, rt->auth_status = 0; if (val) { - if (!rt->nvm->buf) { - ret = -EINVAL; - goto exit_unlock; + if (val == AUTHENTICATE_ONLY) { + ret = tb_retimer_nvm_authenticate(rt, true); + } else { + if (!rt->nvm->flushed) { + if (!rt->nvm->buf) { + ret = -EINVAL; + goto exit_unlock; + } + + ret = tb_retimer_nvm_validate_and_write(rt); + if (ret || val == WRITE_ONLY) + goto exit_unlock; + } + if (val == WRITE_AND_AUTHENTICATE) + ret = tb_retimer_nvm_authenticate(rt, false); } - - ret = tb_retimer_nvm_validate_and_write(rt); - if (ret) - goto exit_unlock; - - ret = usb4_port_retimer_nvm_authenticate(rt->port, rt->index); } exit_unlock: diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 53f6bb85b178..725104c83e3d 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1082,6 +1082,8 @@ int usb4_port_retimer_write(struct tb_port *port, u8 index, u8 reg, const void *buf, u8 size); int usb4_port_retimer_is_last(struct tb_port *port, u8 index); int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index); +int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index, + unsigned int address); int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index, unsigned int address, const void *buf, size_t size); diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c index 76d7335aa440..ceddbe7e9f93 100644 --- a/drivers/thunderbolt/usb4.c +++ b/drivers/thunderbolt/usb4.c @@ -1513,8 +1513,19 @@ int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index) return ret ? ret : metadata & USB4_NVM_SECTOR_SIZE_MASK; } -static int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index, - unsigned int address) +/** + * usb4_port_retimer_nvm_set_offset() - Set NVM write offset + * @port: USB4 port + * @index: Retimer index + * @address: Start offset + * + * Exlicitly sets NVM write offset. Normally when writing to NVM this is + * done automatically by usb4_port_retimer_nvm_write(). + * + * Returns %0 in success and negative errno if there was a failure. + */ +int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index, + unsigned int address) { u32 metadata, dwaddress; int ret;