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Mon, 29 May 2023 21:43:54 -0500 From: Evan Quan To: , , , , , , , , , , , , , , , , , CC: , , , , , , Subject: [PATCH 7/9] drm/amd/pm: add flood detection for wbrf events Date: Tue, 30 May 2023 10:42:25 +0800 Message-ID: <20230530024227.2139632-8-evan.quan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230530024227.2139632-1-evan.quan@amd.com> References: <20230530024227.2139632-1-evan.quan@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT049:EE_|CY8PR12MB7708:EE_ X-MS-Office365-Filtering-Correlation-Id: ecda4d38-3830-4d04-87ac-08db60b7b92d 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)(136003)(346002)(39860400002)(376002)(451199021)(40470700004)(36840700001)(46966006)(336012)(426003)(16526019)(2616005)(41300700001)(83380400001)(26005)(1076003)(186003)(6666004)(7696005)(36860700001)(47076005)(478600001)(110136005)(40460700003)(54906003)(70206006)(82740400003)(6636002)(4326008)(82310400005)(40480700001)(356005)(921005)(316002)(81166007)(7416002)(8676002)(70586007)(44832011)(86362001)(36756003)(2906002)(8936002)(5660300002)(36900700001);DIR:OUT;SFP:1101; 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Signed-off-by: Evan Quan --- v1->v2: - utilize the delayed work(Lijo, Christian) - split the new module parameter changes out(Christian, Alex) v2->v3: - simplify the flood detection further per latest design v3->v4: - drop unneeded wbrf_mutex(Lijo, Christian) - use schedule_delayed_work() to avoid possible concurrent access(Chrisitan) --- drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 28 ++++++++++++++++--- drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h | 7 +++++ 2 files changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c index 89f876cc60e6..2619e310ef54 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c @@ -1272,6 +1272,22 @@ static void smu_wbrf_event_handler(struct amdgpu_device *adev) { struct smu_context *smu = adev->powerplay.pp_handle; + schedule_delayed_work(&smu->wbrf_delayed_work, + msecs_to_jiffies(SMU_WBRF_EVENT_HANDLING_PACE)); +} + +/** + * smu_wbrf_delayed_work_handler - callback on delayed work timer expired + * + * @work: struct work_struct pointer + * + * Flood is over and driver will consume the latest exclusion ranges. + */ +static void smu_wbrf_delayed_work_handler(struct work_struct *work) +{ + struct smu_context *smu = + container_of(work, struct smu_context, wbrf_delayed_work.work); + smu_wbrf_handle_exclusion_ranges(smu); } @@ -1311,6 +1327,9 @@ static int smu_wbrf_init(struct smu_context *smu) if (!smu->wbrf_supported) return 0; + INIT_DELAYED_WORK(&smu->wbrf_delayed_work, + smu_wbrf_delayed_work_handler); + ret = amdgpu_acpi_register_wbrf_notify_handler(adev, smu_wbrf_event_handler); if (ret) @@ -1321,11 +1340,10 @@ static int smu_wbrf_init(struct smu_context *smu) * before our driver loaded. To make sure our driver * is awared of those exclusion ranges. */ - ret = smu_wbrf_handle_exclusion_ranges(smu); - if (ret) - dev_err(adev->dev, "Failed to handle wbrf exclusion ranges\n"); + schedule_delayed_work(&smu->wbrf_delayed_work, + msecs_to_jiffies(SMU_WBRF_EVENT_HANDLING_PACE)); - return ret; + return 0; } /** @@ -1343,6 +1361,8 @@ static void smu_wbrf_fini(struct smu_context *smu) return; amdgpu_acpi_unregister_wbrf_notify_handler(adev); + + cancel_delayed_work_sync(&smu->wbrf_delayed_work); } static int smu_smc_hw_setup(struct smu_context *smu) diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h index ff0af3da0be2..aa63cc43d41c 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h @@ -478,6 +478,12 @@ struct stb_context { #define WORKLOAD_POLICY_MAX 7 +/* + * Configure wbrf event handling pace as there can be only one + * event processed every SMU_WBRF_EVENT_HANDLING_PACE ms. + */ +#define SMU_WBRF_EVENT_HANDLING_PACE 10 + struct smu_context { struct amdgpu_device *adev; @@ -576,6 +582,7 @@ struct smu_context /* data structures for wbrf feature support */ bool wbrf_supported; + struct delayed_work wbrf_delayed_work; }; struct i2c_adapter;