From patchwork Mon Aug 12 12:38:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 11089803 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 939F81398 for ; Mon, 12 Aug 2019 12:39:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8327720587 for ; Mon, 12 Aug 2019 12:39:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 77279205F7; Mon, 12 Aug 2019 12:39:13 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham 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 1B51520587 for ; Mon, 12 Aug 2019 12:39:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726463AbfHLMjI (ORCPT ); Mon, 12 Aug 2019 08:39:08 -0400 Received: from mga11.intel.com ([192.55.52.93]:22553 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726609AbfHLMi4 (ORCPT ); Mon, 12 Aug 2019 08:38:56 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Aug 2019 05:38:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,377,1559545200"; d="scan'208";a="193954998" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 12 Aug 2019 05:38:52 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id 5621D3EA; Mon, 12 Aug 2019 15:38:48 +0300 (EEST) From: Mika Westerberg To: linux-kernel@vger.kernel.org Cc: Andreas Noever , Michael Jamet , Yehezkel Bernat , "Rafael J. Wysocki" , Len Brown , Lukas Wunner , Mario.Limonciello@dell.com, Anthony Wong , Rajmohan Mani , Raanan Avargil , David Laight , Mika Westerberg , linux-acpi@vger.kernel.org Subject: [PATCH v2 6/8] thunderbolt: Expose active parts of NVM even if upgrade is not supported Date: Mon, 12 Aug 2019 15:38:45 +0300 Message-Id: <20190812123847.50802-7-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190812123847.50802-1-mika.westerberg@linux.intel.com> References: <20190812123847.50802-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Ice Lake Thunderbolt controller NVM firmware is part of the BIOS image which means it is not writable through the DMA port anymore. However, we can still read it so we can keep nvm_version and active parts of NVM. This way users still can find out the active NVM version and other potentially useful information directly from Linux. Signed-off-by: Mika Westerberg Reviewed-by: Yehezkel Bernat --- drivers/thunderbolt/switch.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index bd3eaaf34ea1..531f11fecf75 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -364,12 +364,14 @@ static int tb_switch_nvm_add(struct tb_switch *sw) nvm->active = nvm_dev; } - nvm_dev = register_nvmem(sw, nvm->id, NVM_MAX_SIZE, false); - if (IS_ERR(nvm_dev)) { - ret = PTR_ERR(nvm_dev); - goto err_nvm_active; + if (!sw->no_nvm_upgrade) { + nvm_dev = register_nvmem(sw, nvm->id, NVM_MAX_SIZE, false); + if (IS_ERR(nvm_dev)) { + ret = PTR_ERR(nvm_dev); + goto err_nvm_active; + } + nvm->non_active = nvm_dev; } - nvm->non_active = nvm_dev; sw->nvm = nvm; return 0; @@ -398,7 +400,8 @@ static void tb_switch_nvm_remove(struct tb_switch *sw) if (!nvm->authenticating) nvm_clear_auth_status(sw); - nvmem_unregister(nvm->non_active); + if (nvm->non_active) + nvmem_unregister(nvm->non_active); if (nvm->active) nvmem_unregister(nvm->active); ida_simple_remove(&nvm_ida, nvm->id); @@ -1355,8 +1358,11 @@ static umode_t switch_attr_is_visible(struct kobject *kobj, sw->security_level == TB_SECURITY_SECURE) return attr->mode; return 0; - } else if (attr == &dev_attr_nvm_authenticate.attr || - attr == &dev_attr_nvm_version.attr) { + } else if (attr == &dev_attr_nvm_authenticate.attr) { + if (sw->dma_port && !sw->no_nvm_upgrade) + return attr->mode; + return 0; + } else if (attr == &dev_attr_nvm_version.attr) { if (sw->dma_port) return attr->mode; return 0; @@ -1707,13 +1713,17 @@ static int tb_switch_add_dma_port(struct tb_switch *sw) break; } - if (sw->no_nvm_upgrade) + /* Root switch DMA port requires running firmware */ + if (!tb_route(sw) && sw->config.enabled) return 0; sw->dma_port = dma_port_alloc(sw); if (!sw->dma_port) return 0; + if (sw->no_nvm_upgrade) + return 0; + /* * Check status of the previous flash authentication. If there * is one we need to power cycle the switch in any case to make