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Date: Mon, 11 May 2020 13:32:40 -0700 Message-Id: <1589229160-18558-1-git-send-email-tuanphan@os.amperecomputing.com> X-Mailer: git-send-email 2.7.4 Content-Type: text/plain X-ClientProxiedBy: BYAPR05CA0056.namprd05.prod.outlook.com (2603:10b6:a03:74::33) To BYAPR01MB4598.prod.exchangelabs.com (2603:10b6:a03:8a::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from aptiov-dev-Latitude-E7470.amperecomputing.com (4.28.12.214) by BYAPR05CA0056.namprd05.prod.outlook.com (2603:10b6:a03:74::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3000.11 via Frontend Transport; Mon, 11 May 2020 20:32:58 +0000 X-Mailer: git-send-email 2.7.4 X-Originating-IP: [4.28.12.214] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 827201bf-5b43-434d-e5f1-08d7f5ea7df5 X-MS-TrafficTypeDiagnostic: BYAPR01MB4981:|BYAPR01MB4981: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1332; X-Forefront-PRVS: 04004D94E2 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR01MB4598.prod.exchangelabs.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(366004)(346002)(376002)(136003)(39840400004)(396003)(33430700001)(6666004)(66476007)(2906002)(66556008)(16526019)(186003)(66946007)(26005)(86362001)(8936002)(8676002)(109986005)(5660300002)(4326008)(6486002)(6506007)(956004)(2616005)(52116002)(54906003)(33440700001)(316002)(6512007)(478600001)(266003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 8jD0pEwSrokQLrsu4FbQDlUgyGAVge7M5W1x4I2/XfJysOVb/fj/RGmb+L+daxgy1RcSnNIekB9fambCd5E83hlmRd1U/9QZdVVOSLMCgpD3tD2YLF0CtcewXWMwAL3Oe/VJ6eghmsxW1zUevebzrKhlaSlNkYKvPBumYoP8foEmiFcAqZu+6gpU06cPYaC7n2DQexMPMwvH1cf2V4o89YiGSxG36Lk1Qfpp+iojSQs3/lDOO7/on2CBa23I2hi9TR7X9BJdB+Y5uitl8BLbXgknqvzV2EKTPhvqomV1OB2UcWnwf9D9VH4GGEk/HP2oqeL3ROUDbLwAjYXgimSeaoxWiPndzG+rhdf4YMmcii33VYzUceAZZGtvKdGTXr7OufRW5RGNr8y5NJCr9OMpAxuD3uhvoYmxHfSZADIjCP0w7vEnjskFoFO7+2gbrtegMpGSh3ns/tZqw7RnaM7RtCQSITv0v8llEghqM46yvbQ= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: 827201bf-5b43-434d-e5f1-08d7f5ea7df5 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2020 20:32:58.3294 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: jIpNrE+sdzPV0monBQcn9ench0MpCgB2ucrUtgD9Mbl1sXRd6/Za0d6uEY4PwpagIPFI+5Oqv7cT9zymziwfBFTBct68Ok4rZj5dU6b29rx91hYbqNhbGEhv93XAYab6 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR01MB4981 To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add ACPI node probing device support. Each DSU ACPI node defines a "cpus" package with a per cpu MPIDR element. Signed-off-by: Tuan Phan --- Changes in v2: - Removed IRQF_SHARED. - Fixed ACPI runtime detection. The ACPI binding spec for DSU ACPI node is under beta and located in ARM server group under project "ACPI on ARM". drivers/perf/arm_dsu_pmu.c | 71 ++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 63 insertions(+), 8 deletions(-) diff --git a/drivers/perf/arm_dsu_pmu.c b/drivers/perf/arm_dsu_pmu.c index 70968c8..784d177 100644 --- a/drivers/perf/arm_dsu_pmu.c +++ b/drivers/perf/arm_dsu_pmu.c @@ -11,6 +11,7 @@ #define DRVNAME PMUNAME "_pmu" #define pr_fmt(fmt) DRVNAME ": " fmt +#include #include #include #include @@ -603,18 +604,21 @@ static struct dsu_pmu *dsu_pmu_alloc(struct platform_device *pdev) } /** - * dsu_pmu_dt_get_cpus: Get the list of CPUs in the cluster. + * dsu_pmu_dt_get_cpus: Get the list of CPUs in the cluster + * from device tree. */ -static int dsu_pmu_dt_get_cpus(struct device_node *dev, cpumask_t *mask) +static int dsu_pmu_dt_get_cpus(struct platform_device *pdev) { int i = 0, n, cpu; struct device_node *cpu_node; + struct dsu_pmu *dsu_pmu = + (struct dsu_pmu *) platform_get_drvdata(pdev); - n = of_count_phandle_with_args(dev, "cpus", NULL); + n = of_count_phandle_with_args(pdev->dev.of_node, "cpus", NULL); if (n <= 0) return -ENODEV; for (; i < n; i++) { - cpu_node = of_parse_phandle(dev, "cpus", i); + cpu_node = of_parse_phandle(pdev->dev.of_node, "cpus", i); if (!cpu_node) break; cpu = of_cpu_node_to_id(cpu_node); @@ -626,11 +630,54 @@ static int dsu_pmu_dt_get_cpus(struct device_node *dev, cpumask_t *mask) */ if (cpu < 0) continue; - cpumask_set_cpu(cpu, mask); + cpumask_set_cpu(cpu, &dsu_pmu->associated_cpus); } return 0; } +/** + * dsu_pmu_acpi_get_cpus: Get the list of CPUs in the cluster + * from ACPI. + */ +static int dsu_pmu_acpi_get_cpus(struct platform_device *pdev) +{ + int i, cpu, ret; + const union acpi_object *obj; + struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); + struct dsu_pmu *dsu_pmu = + (struct dsu_pmu *) platform_get_drvdata(pdev); + + ret = acpi_dev_get_property(adev, "cpus", ACPI_TYPE_PACKAGE, &obj); + if (ret < 0) + return ret; + + for (i = 0; i < obj->package.count; i++) { + /* Each element is the MPIDR of associated cpu */ + for_each_possible_cpu(cpu) { + if (cpu_physical_id(cpu) == + obj->package.elements[i].integer.value) + cpumask_set_cpu(cpu, &dsu_pmu->associated_cpus); + } + } + return 0; +} + +static int dsu_pmu_platform_get_cpus(struct platform_device *pdev) +{ + int ret = -ENOENT; + struct fwnode_handle *fwnode = dev_fwnode(&pdev->dev); + + if (IS_ERR_OR_NULL(fwnode)) + return ret; + + if (is_of_node(fwnode)) + ret = dsu_pmu_dt_get_cpus(pdev); + else if (is_acpi_device_node(fwnode)) + ret = dsu_pmu_acpi_get_cpus(pdev); + + return ret; +} + /* * dsu_pmu_probe_pmu: Probe the PMU details on a CPU in the cluster. */ @@ -683,7 +730,9 @@ static int dsu_pmu_device_probe(struct platform_device *pdev) if (IS_ERR(dsu_pmu)) return PTR_ERR(dsu_pmu); - rc = dsu_pmu_dt_get_cpus(pdev->dev.of_node, &dsu_pmu->associated_cpus); + platform_set_drvdata(pdev, dsu_pmu); + + rc = dsu_pmu_platform_get_cpus(pdev); if (rc) { dev_warn(&pdev->dev, "Failed to parse the CPUs\n"); return rc; @@ -707,7 +756,6 @@ static int dsu_pmu_device_probe(struct platform_device *pdev) } dsu_pmu->irq = irq; - platform_set_drvdata(pdev, dsu_pmu); rc = cpuhp_state_add_instance(dsu_pmu_cpuhp_state, &dsu_pmu->cpuhp_node); if (rc) @@ -754,11 +802,19 @@ static const struct of_device_id dsu_pmu_of_match[] = { { .compatible = "arm,dsu-pmu", }, {}, }; +MODULE_DEVICE_TABLE(of, dsu_pmu_of_match); + +static const struct acpi_device_id dsu_pmu_acpi_match[] = { + { "ARMHD500", 0}, + {}, +}; +MODULE_DEVICE_TABLE(acpi, dsu_pmu_acpi_match); static struct platform_driver dsu_pmu_driver = { .driver = { .name = DRVNAME, .of_match_table = of_match_ptr(dsu_pmu_of_match), + .acpi_match_table = ACPI_PTR(dsu_pmu_acpi_match), }, .probe = dsu_pmu_device_probe, .remove = dsu_pmu_device_remove, @@ -827,7 +883,6 @@ static void __exit dsu_pmu_exit(void) module_init(dsu_pmu_init); module_exit(dsu_pmu_exit); -MODULE_DEVICE_TABLE(of, dsu_pmu_of_match); MODULE_DESCRIPTION("Perf driver for ARM DynamIQ Shared Unit"); MODULE_AUTHOR("Suzuki K Poulose "); MODULE_LICENSE("GPL v2"); -- 2.7.4