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Wysocki" CC: , , "S-k Shyam-sundar" , Natikar Basavaraj , Deucher Alexander , , Lukas Wunner , Mario Limonciello Subject: [PATCH v4 1/2] PCI: Refactor pci_bridge_d3_possible() Date: Wed, 24 May 2023 14:07:25 -0500 Message-ID: <20230524190726.17012-1-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT006:EE_|BL1PR12MB5078:EE_ X-MS-Office365-Filtering-Correlation-Id: eaadf609-5a8a-4df9-6c60-08db5c8a28e4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(396003)(346002)(136003)(376002)(39860400002)(451199021)(40470700004)(36840700001)(46966006)(478600001)(1076003)(82310400005)(186003)(16526019)(54906003)(2616005)(26005)(7696005)(6666004)(426003)(336012)(356005)(81166007)(82740400003)(40460700003)(4326008)(47076005)(83380400001)(36756003)(110136005)(8676002)(316002)(36860700001)(5660300002)(70586007)(2906002)(70206006)(44832011)(8936002)(41300700001)(86362001)(40480700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 May 2023 19:07:46.2951 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: eaadf609-5a8a-4df9-6c60-08db5c8a28e4 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT006.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5078 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org All of the cases handled by pci_bridge_d3_possible() are specific to these branches: ``` case PCI_EXP_TYPE_ROOT_PORT: case PCI_EXP_TYPE_UPSTREAM: case PCI_EXP_TYPE_DOWNSTREAM: ``` Drop a level of indentation by returning false in the default case instead. No intended functional changes. Signed-off-by: Mario Limonciello Acked-by: Rafael J. Wysocki Reviewed-by: Mika Westerberg --- v3->v4: * New patch --- drivers/pci/pci.c | 68 +++++++++++++++++++++++------------------------ 1 file changed, 34 insertions(+), 34 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 5ede93222bc1..d1fa040bcea7 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2978,48 +2978,48 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge) case PCI_EXP_TYPE_ROOT_PORT: case PCI_EXP_TYPE_UPSTREAM: case PCI_EXP_TYPE_DOWNSTREAM: - if (pci_bridge_d3_disable) - return false; + break; + default: + return false; + } - /* - * Hotplug ports handled by firmware in System Management Mode - * may not be put into D3 by the OS (Thunderbolt on non-Macs). - */ - if (bridge->is_hotplug_bridge && !pciehp_is_native(bridge)) - return false; + if (pci_bridge_d3_disable) + return false; - if (pci_bridge_d3_force) - return true; + /* + * Hotplug ports handled by firmware in System Management Mode + * may not be put into D3 by the OS (Thunderbolt on non-Macs). + */ + if (bridge->is_hotplug_bridge && !pciehp_is_native(bridge)) + return false; - /* Even the oldest 2010 Thunderbolt controller supports D3. */ - if (bridge->is_thunderbolt) - return true; + if (pci_bridge_d3_force) + return true; - /* Platform might know better if the bridge supports D3 */ - if (platform_pci_bridge_d3(bridge)) - return true; + /* Even the oldest 2010 Thunderbolt controller supports D3. */ + if (bridge->is_thunderbolt) + return true; - /* - * Hotplug ports handled natively by the OS were not validated - * by vendors for runtime D3 at least until 2018 because there - * was no OS support. - */ - if (bridge->is_hotplug_bridge) - return false; + /* Platform might know better if the bridge supports D3 */ + if (platform_pci_bridge_d3(bridge)) + return true; - if (dmi_check_system(bridge_d3_blacklist)) - return false; + /* + * Hotplug ports handled natively by the OS were not validated + * by vendors for runtime D3 at least until 2018 because there + * was no OS support. + */ + if (bridge->is_hotplug_bridge) + return false; - /* - * It should be safe to put PCIe ports from 2015 or newer - * to D3. - */ - if (dmi_get_bios_year() >= 2015) - return true; - break; - } + if (dmi_check_system(bridge_d3_blacklist)) + return false; - return false; + /* + * It should be safe to put PCIe ports from 2015 or newer + * to D3. + */ + return dmi_get_bios_year() >= 2015; } static int pci_dev_check_d3cold(struct pci_dev *dev, void *data) From patchwork Wed May 24 19:07:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 13254462 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7868C7EE2D for ; Wed, 24 May 2023 19:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229675AbjEXTHx (ORCPT ); Wed, 24 May 2023 15:07:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbjEXTHv (ORCPT ); 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Wed, 24 May 2023 14:07:45 -0500 From: Mario Limonciello To: Bjorn Helgaas , Mika Westerberg , "Rafael J . Wysocki" CC: , , "S-k Shyam-sundar" , Natikar Basavaraj , Deucher Alexander , , Lukas Wunner , Mario Limonciello , Iain Lane Subject: [PATCH v4 2/2] PCI: Don't assume root ports from > 2015 are power manageable Date: Wed, 24 May 2023 14:07:26 -0500 Message-ID: <20230524190726.17012-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230524190726.17012-1-mario.limonciello@amd.com> References: <20230524190726.17012-1-mario.limonciello@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT084:EE_|CH3PR12MB9077:EE_ X-MS-Office365-Filtering-Correlation-Id: 20423d81-28f9-4195-7352-08db5c8a29d8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(346002)(396003)(39860400002)(376002)(136003)(451199021)(36840700001)(40470700004)(46966006)(40460700003)(5660300002)(8676002)(8936002)(16526019)(186003)(2906002)(36860700001)(86362001)(2616005)(36756003)(336012)(426003)(83380400001)(66574015)(47076005)(44832011)(82740400003)(356005)(40480700001)(26005)(1076003)(82310400005)(316002)(70586007)(70206006)(4326008)(6666004)(110136005)(54906003)(478600001)(81166007)(7696005)(966005)(41300700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 May 2023 19:07:47.8944 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 20423d81-28f9-4195-7352-08db5c8a29d8 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT084.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9077 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Using a USB keyboard or mouse to wakeup the system from s2idle fails when that XHCI device is connected to a USB-C port for an AMD USB4 router. Due to commit 9d26d3a8f1b0 ("PCI: Put PCIe ports into D3 during suspend") all PCIe ports go into D3 during s2idle. When specific root ports are put into D3 over s2idle on some AMD platforms it is not possible for the platform to properly identify wakeup sources. This happens whether the root port goes into D3hot or D3cold. Comparing registers between Linux and Windows 11 this behavior to put these specific root ports into D3 at suspend is unique to Linux. On an affected system Windows does not put those specific root ports into D3 over Modern Standby. Windows doesn't put the root ports into D3 because root ports are not power manageable. Linux shouldn't assume root ports support D3 just because they're on a machine newer than 2015, the ports should also be deemed power manageable. Add an extra check explicitly for root ports to ensure D3 isn't selected for these ports. Fixes: 9d26d3a8f1b0 ("PCI: Put PCIe ports into D3 during suspend") Reported-by: Iain Lane Closes: https://forums.lenovo.com/t5/Ubuntu/Z13-can-t-resume-from-suspend-with-external-USB-keyboard/m-p/5217121 Signed-off-by: Mario Limonciello Acked-by: Rafael J. Wysocki Reviewed-by: Kuppuswamy Sathyanarayanan Reviewed-by: Mika Westerberg --- v3->v4: * Move after refactor --- drivers/pci/pci.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index d1fa040bcea7..d293db963327 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3015,6 +3015,14 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge) if (dmi_check_system(bridge_d3_blacklist)) return false; + /* + * It's not safe to put root ports that don't support power + * management into D3. + */ + if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT && + !platform_pci_power_manageable(bridge)) + return false; + /* * It should be safe to put PCIe ports from 2015 or newer * to D3.