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Tue, 21 Mar 2023 23:10:19 -0500 From: Tanmay Shah To: , CC: , , "Ben Levinsky" , Ben Levinsky Subject: [PATCH v2 1/2] remoteproc: Make rproc_get_by_phandle() work for clusters Date: Tue, 21 Mar 2023 21:09:34 -0700 Message-ID: <20230322040933.924813-2-tanmay.shah@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230322040933.924813-1-tanmay.shah@amd.com> References: <20230322040933.924813-1-tanmay.shah@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000B8EF:EE_|BL0PR12MB4883:EE_ X-MS-Office365-Filtering-Correlation-Id: 297400be-68f6-44d2-b03c-08db2a8b5a23 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:(13230025)(4636009)(39860400002)(346002)(136003)(376002)(396003)(451199018)(40470700004)(36840700001)(46966006)(2616005)(41300700001)(186003)(426003)(4326008)(47076005)(83380400001)(478600001)(6666004)(336012)(316002)(110136005)(8676002)(70586007)(70206006)(26005)(1076003)(54906003)(36860700001)(44832011)(8936002)(5660300002)(82740400003)(81166007)(2906002)(36756003)(40460700003)(82310400005)(356005)(86362001)(40480700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Mar 2023 04:10:20.3228 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 297400be-68f6-44d2-b03c-08db2a8b5a23 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: CY4PEPF0000B8EF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB4883 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Mathieu Poirier Multi-cluster remoteproc designs typically have the following DT declaration: remoteproc_cluster { compatible = "soc,remoteproc-cluster"; core0: core0 { compatible = "soc,remoteproc-core" memory-region; sram; }; core1: core1 { compatible = "soc,remoteproc-core" memory-region; sram; } }; A driver exists for the cluster rather than the individual cores themselves so that operation mode and HW specific configurations applicable to the cluster can be made. Because the driver exists at the cluster level and not the individual core level, function rproc_get_by_phandle() fails to return the remoteproc associated with the phandled it is called for. This patch enhances rproc_get_by_phandle() by looking for the cluster's driver when the driver for the immediate remoteproc's parent is not found. Reported-by: Ben Levinsky Signed-off-by: Mathieu Poirier Tested-by: Ben Levinsky --- drivers/remoteproc/remoteproc_core.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 80072b6b6283..a3e7c8798381 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include #include @@ -2111,7 +2112,9 @@ EXPORT_SYMBOL(rproc_detach); #ifdef CONFIG_OF struct rproc *rproc_get_by_phandle(phandle phandle) { + struct platform_device *cluster_pdev; struct rproc *rproc = NULL, *r; + struct device_driver *driver; struct device_node *np; np = of_find_node_by_phandle(phandle); @@ -2122,7 +2125,30 @@ struct rproc *rproc_get_by_phandle(phandle phandle) list_for_each_entry_rcu(r, &rproc_list, node) { if (r->dev.parent && device_match_of_node(r->dev.parent, np)) { /* prevent underlying implementation from being removed */ - if (!try_module_get(r->dev.parent->driver->owner)) { + + /* + * If the remoteproc's parent has a driver, the + * remoteproc is not part of a cluster and we can use + * that driver. + */ + driver = r->dev.parent->driver; + + /* + * If the remoteproc's parent does not have a driver, + * look for the driver associated with the cluster. + */ + if (!driver) { + cluster_pdev = of_find_device_by_node(np->parent); + if (!cluster_pdev) { + dev_err(&r->dev, "can't get parent\n"); + break; + } + + driver = cluster_pdev->dev.driver; + put_device(&cluster_pdev->dev); + } + + if (!try_module_get(driver->owner)) { dev_err(&r->dev, "can't get owner\n"); break; } From patchwork Wed Mar 22 04:09:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tanmay Shah X-Patchwork-Id: 13183534 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 3F831C6FD1C for ; Wed, 22 Mar 2023 04:10:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230329AbjCVEKu (ORCPT ); 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Tue, 21 Mar 2023 23:10:30 -0500 Received: from SATLEXMB03.amd.com (10.181.40.144) by SATLEXMB08.amd.com (10.181.40.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Tue, 21 Mar 2023 21:10:30 -0700 Received: from xsjtanmays50.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Tue, 21 Mar 2023 23:10:29 -0500 From: Tanmay Shah To: , CC: , , Tanmay Shah , Tarak Reddy Subject: [PATCH v2 2/2] remoteproc: enhance rproc_put() for clusters Date: Tue, 21 Mar 2023 21:09:36 -0700 Message-ID: <20230322040933.924813-3-tanmay.shah@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230322040933.924813-1-tanmay.shah@amd.com> References: <20230322040933.924813-1-tanmay.shah@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0000B077:EE_|MW4PR12MB5643:EE_ X-MS-Office365-Filtering-Correlation-Id: 22419b43-55e5-4666-30ea-08db2a8b6065 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Mar 2023 04:10:30.8341 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 22419b43-55e5-4666-30ea-08db2a8b6065 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: DS1PEPF0000B077.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB5643 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org This patch enhances rproc_put() to support remoteproc clusters with multiple child nodes as in rproc_get_by_phandle(). Signed-off-by: Tarak Reddy Signed-off-by: Tanmay Shah --- drivers/remoteproc/remoteproc_core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index a3e7c8798381..e7e451012615 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -2560,6 +2560,19 @@ EXPORT_SYMBOL(rproc_free); void rproc_put(struct rproc *rproc) { module_put(rproc->dev.parent->driver->owner); + struct platform_device *cluster_pdev; + + if (rproc->dev.parent) { + if (rproc->dev.parent->driver) { + module_put(rproc->dev.parent->driver->owner); + } else { + cluster_pdev = of_find_device_by_node(rproc->dev.parent->of_node->parent); + if (cluster_pdev) { + module_put(cluster_pdev->dev.driver->owner); + put_device(&cluster_pdev->dev); + } + } + } put_device(&rproc->dev); } EXPORT_SYMBOL(rproc_put);