From patchwork Mon Apr 29 16:44:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 10922095 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 822B914B6 for ; Mon, 29 Apr 2019 16:45:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6F51F283B1 for ; Mon, 29 Apr 2019 16:45:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 60FCC2842D; Mon, 29 Apr 2019 16:45:01 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 24DF228574 for ; Mon, 29 Apr 2019 16:45:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oX3ZYiMQdaCAQTqauyv7rjT0s16gUOsRZf54T6CVITQ=; b=LMmDECVotkgjr6 dh96cnZNjxibze618W6g/Bs0XMiWmRK5MKpagIoDENIaJ50DF1aub8aQYEs7lmYtLAWFh82lnhMRy msTrDvTt+jkS09s0pU+RWhfA7UT2Us/2YkLJT2npQGKuIvVWvBEUM3g2zk5Li1QcBs38a+oQJGVLP wnkZoni/qExpFgmzSIGXNO18BpG8cd5+HEn4BsERkLDPqD8+zxBMOiCnHOU5PO5KKvhQT+CrvPJp3 IGlz2NS/cR8pDyN+6AdK8mo7LdXXmlCQiifcE8klzHIaf404yAqAy/WBKMEJ58dQAl0ydkLDn5BRV fvBjb1bU+6LyTguGNNoQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hL9Of-0001n5-TE; Mon, 29 Apr 2019 16:44:53 +0000 Received: from mail-eopbgr10040.outbound.protection.outlook.com ([40.107.1.40] helo=EUR02-HE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hL9OQ-0001XU-J5 for linux-arm-kernel@lists.infradead.org; Mon, 29 Apr 2019 16:44:41 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Nm8ENeZJY0gq/yrAFqr3uQqS3QNaZiDHTyXgO2pGpQw=; b=TU7gNRo4NbD3GIIkDyD/kJojV9Dws/qdoHuZCvhymfo4Qf1rkVKCRq4rnC+XDQHp/8eee671v7eSXdHBVfz7TchX9Mb5VRming0gjI87fVVsiylHBBcglTCg6wuRC7rfIWKW9JH3s2psQjDzFVPXBh7q+QzMW8W9Jqnm6RrPmGo= Received: from VI1PR04MB4910.eurprd04.prod.outlook.com (20.177.49.159) by VI1PR04MB5791.eurprd04.prod.outlook.com (20.178.127.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1835.12; Mon, 29 Apr 2019 16:44:32 +0000 Received: from VI1PR04MB4910.eurprd04.prod.outlook.com ([fe80::d973:1a7d:2eb6:281c]) by VI1PR04MB4910.eurprd04.prod.outlook.com ([fe80::d973:1a7d:2eb6:281c%7]) with mapi id 15.20.1835.018; Mon, 29 Apr 2019 16:44:32 +0000 From: Frank Li To: "mark.rutland@arm.com" , "will.deacon@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , dl-linux-imx , "robh+dt@kernel.org" , Aisheng Dong , "devicetree@vger.kernel.org" , "lznuaa@gmail.com" , "linux-arm-kernel@lists.infradead.org" Subject: [PATCH V9 2/4] drivers/perf: imx_ddr: Add ddr performance counter support Thread-Topic: [PATCH V9 2/4] drivers/perf: imx_ddr: Add ddr performance counter support Thread-Index: AQHU/qrRWWwFZjSUiUaX06gAgZvPlg== Date: Mon, 29 Apr 2019 16:44:32 +0000 Message-ID: <1556556252-22868-2-git-send-email-Frank.Li@nxp.com> References: <1556556252-22868-1-git-send-email-Frank.Li@nxp.com> In-Reply-To: <1556556252-22868-1-git-send-email-Frank.Li@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SN6PR01CA0009.prod.exchangelabs.com (2603:10b6:805:b6::22) To VI1PR04MB4910.eurprd04.prod.outlook.com (2603:10a6:803:56::31) authentication-results: spf=none (sender IP is ) smtp.mailfrom=frank.li@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.5.2 x-originating-ip: [64.157.242.38] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d3502336-180d-4905-028f-08d6ccc1f42b x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4618075)(2017052603328)(7193020); SRVR:VI1PR04MB5791; x-ms-traffictypediagnostic: VI1PR04MB5791: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1850; x-forefront-prvs: 0022134A87 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(39860400002)(376002)(366004)(396003)(136003)(346002)(199004)(189003)(68736007)(102836004)(7736002)(305945005)(7416002)(2201001)(86362001)(25786009)(4326008)(99286004)(186003)(110136005)(316002)(3846002)(66946007)(66476007)(66556008)(6512007)(6486002)(26005)(6116002)(76176011)(64756008)(66446008)(73956011)(52116002)(386003)(53946003)(6506007)(6436002)(2906002)(53936002)(36756003)(2616005)(476003)(97736004)(11346002)(2501003)(486006)(81156014)(8676002)(50226002)(81166006)(8936002)(446003)(14444005)(5024004)(71190400001)(5660300002)(71200400001)(478600001)(14454004)(256004)(30864003)(66066001)(921003)(1121003)(579004); DIR:OUT; SFP:1101; SCL:1; SRVR:VI1PR04MB5791; H:VI1PR04MB4910.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: PNBQocSHCvTezrZDdD+ZVgbvfL/R/N4olBm6j+e537c2jW2sgM3A+eU4DfaXWXkqCSmaWkohpuc8PJf5XFg4RIF9kdALcBFxhZrlpYqKfWK3WS1WLxOXq2PIrMtjLqkn/yJX/GGVuNslOqoUwR7fYwxV9N9ty3CXwmRSLOCW4A+0wISKupV8M0mcOUKtBHs37RC7IHnp7zy+gOaEOuHZxWmgQCsSTi4rqYVKA/JZKnPtQBgHSNyoL6LxTfgZ7g7lsjWd6hE6i9VL+iToZTwEnSkWeHDmqXGBeyDf2MT6Wrwky8ekImffnAH+8Fqw3I7nfeFkXulLoily1ygMzLLIoMOfSH5303+0M3TMwWdljWYWM3T682+WXvYCoBkQB2HqeluMMWTQQtLzTmvK8nRMvKNKcR9ppaEztT7QsGnklF8= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: d3502336-180d-4905-028f-08d6ccc1f42b X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Apr 2019 16:44:32.1150 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5791 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190429_094438_798602_83C683AA X-CRM114-Status: GOOD ( 13.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Frank Li Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add ddr performance monitor support for iMX8QXP There are 4 counters for ddr perfomance events. counter 0 is dedicated for cycles. you choose any up to 3 no cycles events. for example: perf stat -a -e ddr0/read-cycles/,ddr0/write-cycles/,ddr0/precharge/ ls perf stat -a -e ddr0/cycles/,ddr0/read-access/,ddr0/write-access/ ls Support below events. ddr0/activate/ [Kernel PMU event] ddr0/axid-read/ [Kernel PMU event] ddr0/axid-write/ [Kernel PMU event] ddr0/cycles/ [Kernel PMU event] ddr0/hp-read-credit-cnt/ [Kernel PMU event] ddr0/hp-read/ [Kernel PMU event] ddr0/hp-req-nodcredit/ [Kernel PMU event] ddr0/hp-xact-credit/ [Kernel PMU event] ddr0/load-mode/ [Kernel PMU event] ddr0/lp-read-credit-cnt/ [Kernel PMU event] ddr0/lp-req-nocredit/ [Kernel PMU event] ddr0/lp-xact-credit/ [Kernel PMU event] ddr0/mwr/ [Kernel PMU event] ddr0/precharge/ [Kernel PMU event] ddr0/raw-hazard/ [Kernel PMU event] ddr0/read-access/ [Kernel PMU event] ddr0/read-activate/ [Kernel PMU event] ddr0/read-command/ [Kernel PMU event] ddr0/read-cycles/ [Kernel PMU event] ddr0/read-modify-write-command/ [Kernel PMU event] ddr0/read-queue-depth/ [Kernel PMU event] ddr0/read-write-transition/ [Kernel PMU event] ddr0/read/ [Kernel PMU event] ddr0/refresh/ [Kernel PMU event] ddr0/selfresh/ [Kernel PMU event] ddr0/wr-xact-credit/ [Kernel PMU event] ddr0/write-access/ [Kernel PMU event] ddr0/write-command/ [Kernel PMU event] ddr0/write-credit-cnt/ [Kernel PMU event] ddr0/write-cycles/ [Kernel PMU event] ddr0/write-queue-depth/ [Kernel PMU event] ddr0/write/ Signed-off-by: Frank Li --- No change from V8 to V9 Change from v7 to v8 * remove unused define * change total_events to active_events, change active_events to events * remove flags, * fix multi line comments code sytle * add pmu_enable\disable function * disable event at irq handle * remove counter check at ddr_perf_free_counter * remove pmu->irq check * add group check Change from v6 to v7 * added irq affinity handle, ref arm-ccn.c * added IRQF_NOBALANCING | IRQF_NO_THREAD * added ida_simple_remove at failure path Change from v5 to v6 * fix insmod\rmmod problem * remove randunt register read at irq handle * change u32 irq to int * devm_request_irq use default flags. Change from v4 to v5 * Remove AXI ID filter function Change from v3 to v4 * Change FSL_IMX8_DDR_PERF to FSL_IMX8_DDR_PMU * sort include * remove struct fsl_ddr_devtype_data * Added comment need disable control first * Added comment about must enable cycle counter * Added macro for EVENT_AXI_READ, remove hardcode 0x41 and 0x42 * Added comment about cycle counter is fastest one Change from v2 to v3 * remove kfree Change from V1 to V2 * update Kconfig by use i.MX8 instead of i.MX8 QXP * remove gpl statememnt since SPDX tag * use dev_kzalloc * use dev_err * commit message show axi_read 0x41\axi_write 0x42 * commit message show cycles must be enabled * Irq only issue at cycles overflow * use NUM_COUNTER * use devm_request_irq * add hotplug callback to handle context migration drivers/perf/Kconfig | 7 + drivers/perf/Makefile | 1 + drivers/perf/fsl_imx8_ddr_perf.c | 589 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 597 insertions(+) create mode 100644 drivers/perf/fsl_imx8_ddr_perf.c diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index a94e586..9bc3785 100644 --- a/drivers/perf/Kconfig +++ b/drivers/perf/Kconfig @@ -70,6 +70,13 @@ config ARM_DSU_PMU system, control logic. The PMU allows counting various events related to DSU. +config FSL_IMX8_DDR_PMU + tristate "Freescale i.MX8 DDR perf monitor" + depends on ARCH_MXC + help + Provides support for ddr perfomance monitor in i.MX8. Provide memory + througput information. + config HISI_PMU bool "HiSilicon SoC PMU" depends on ARM64 && ACPI diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile index 3048994..2ebb4de 100644 --- a/drivers/perf/Makefile +++ b/drivers/perf/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_ARM_DSU_PMU) += arm_dsu_pmu.o obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o obj-$(CONFIG_ARM_SMMU_V3_PMU) += arm_smmuv3_pmu.o +obj-$(CONFIG_FSL_IMX8_DDR_PMU) += fsl_imx8_ddr_perf.o obj-$(CONFIG_HISI_PMU) += hisilicon/ obj-$(CONFIG_QCOM_L2_PMU) += qcom_l2_pmu.o obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c new file mode 100644 index 0000000..087d75a --- /dev/null +++ b/drivers/perf/fsl_imx8_ddr_perf.c @@ -0,0 +1,589 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2017 NXP + * Copyright 2016 Freescale Semiconductor, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define COUNTER_CNTL 0x0 +#define COUNTER_READ 0x20 + +#define COUNTER_DPCR1 0x30 + +#define CNTL_OVER 0x1 +#define CNTL_CLEAR 0x2 +#define CNTL_EN 0x4 +#define CNTL_EN_MASK 0xFFFFFFFB +#define CNTL_CLEAR_MASK 0xFFFFFFFD +#define CNTL_OVER_MASK 0xFFFFFFFE + +#define CNTL_CSV_SHIFT 24 +#define CNTL_CSV_MASK (0xFF << CNTL_CSV_SHIFT) + +#define EVENT_CYCLES_ID 0 +#define EVENT_CYCLES_COUNTER 0 +#define NUM_COUNTERS 4 + +#define to_ddr_pmu(p) container_of(p, struct ddr_pmu, pmu) + +#define DDR_PERF_DEV_NAME "ddr_perf" + +static DEFINE_IDA(ddr_ida); + +PMU_EVENT_ATTR_STRING(cycles, ddr_perf_cycles, "event=0x00"); +PMU_EVENT_ATTR_STRING(selfresh, ddr_perf_selfresh, "event=0x01"); +PMU_EVENT_ATTR_STRING(read-access, ddr_perf_read_accesses, "event=0x04"); +PMU_EVENT_ATTR_STRING(write-access, ddr_perf_write_accesses, "event=0x05"); +PMU_EVENT_ATTR_STRING(read-queue-depth, ddr_perf_read_queue_depth, + "event=0x08"); +PMU_EVENT_ATTR_STRING(write-queue-depth, ddr_perf_write_queue_depth, + "event=0x09"); +PMU_EVENT_ATTR_STRING(lp-read-credit-cnt, ddr_perf_lp_read_credit_cnt, + "event=0x10"); +PMU_EVENT_ATTR_STRING(hp-read-credit-cnt, ddr_perf_hp_read_credit_cnt, + "event=0x11"); +PMU_EVENT_ATTR_STRING(write-credit-cnt, ddr_perf_write_credit_cnt, + "event=0x12"); +PMU_EVENT_ATTR_STRING(read-command, ddr_perf_read_command, "event=0x20"); +PMU_EVENT_ATTR_STRING(write-command, ddr_perf_write_command, "event=0x21"); +PMU_EVENT_ATTR_STRING(read-modify-write-command, + ddr_perf_read_modify_write_command, "event=0x22"); +PMU_EVENT_ATTR_STRING(hp-read, ddr_perf_hp_read, "event=0x23"); +PMU_EVENT_ATTR_STRING(hp-req-nodcredit, ddr_perf_hp_req_nocredit, "event=0x24"); +PMU_EVENT_ATTR_STRING(hp-xact-credit, ddr_perf_hp_xact_credit, "event=0x25"); +PMU_EVENT_ATTR_STRING(lp-req-nocredit, ddr_perf_lp_req_nocredit, "event=0x26"); +PMU_EVENT_ATTR_STRING(lp-xact-credit, ddr_perf_lp_xact_credit, "event=0x27"); +PMU_EVENT_ATTR_STRING(wr-xact-credit, ddr_perf_wr_xact_credit, "event=0x29"); +PMU_EVENT_ATTR_STRING(read-cycles, ddr_perf_read_cycles, "event=0x2a"); +PMU_EVENT_ATTR_STRING(write-cycles, ddr_perf_write_cycles, "event=0x2b"); +PMU_EVENT_ATTR_STRING(read-write-transition, ddr_perf_read_write_transition, + "event=0x30"); +PMU_EVENT_ATTR_STRING(precharge, ddr_perf_precharge, "event=0x31"); +PMU_EVENT_ATTR_STRING(activate, ddr_perf_activate, "event=0x32"); +PMU_EVENT_ATTR_STRING(load-mode, ddr_perf_load_mode, "event=0x33"); +PMU_EVENT_ATTR_STRING(mwr, ddr_perf_mwr, "event=0x34"); +PMU_EVENT_ATTR_STRING(read, ddr_perf_read, "event=0x35"); +PMU_EVENT_ATTR_STRING(read-activate, ddr_perf_read_activate, "event=0x36"); +PMU_EVENT_ATTR_STRING(refresh, ddr_perf_refresh, "event=0x37"); +PMU_EVENT_ATTR_STRING(write, ddr_perf_write, "event=0x38"); +PMU_EVENT_ATTR_STRING(raw-hazard, ddr_perf_raw_hazard, "event=0x39"); + +static const struct of_device_id imx_ddr_pmu_dt_ids[] = { + { .compatible = "fsl,imx8-ddr-pmu",}, + { .compatible = "fsl,imx8m-ddr-pmu",}, + { /* sentinel */ } +}; + +struct ddr_pmu { + struct pmu pmu; + void __iomem *base; + unsigned int cpu; + struct hlist_node node; + struct device *dev; + struct perf_event *events[NUM_COUNTERS]; + int active_events; + enum cpuhp_state cpuhp_state; + int irq; + int id; +}; + +static ssize_t ddr_perf_cpumask_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ddr_pmu *pmu = dev_get_drvdata(dev); + + return cpumap_print_to_pagebuf(true, buf, cpumask_of(pmu->cpu)); +} + +static struct device_attribute ddr_perf_cpumask_attr = + __ATTR(cpumask, 0444, ddr_perf_cpumask_show, NULL); + +static struct attribute *ddr_perf_cpumask_attrs[] = { + &ddr_perf_cpumask_attr.attr, + NULL, +}; + +static struct attribute_group ddr_perf_cpumask_attr_group = { + .attrs = ddr_perf_cpumask_attrs, +}; + +static struct attribute *ddr_perf_events_attrs[] = { + &ddr_perf_cycles.attr.attr, + &ddr_perf_selfresh.attr.attr, + &ddr_perf_read_accesses.attr.attr, + &ddr_perf_write_accesses.attr.attr, + &ddr_perf_read_queue_depth.attr.attr, + &ddr_perf_write_queue_depth.attr.attr, + &ddr_perf_lp_read_credit_cnt.attr.attr, + &ddr_perf_hp_read_credit_cnt.attr.attr, + &ddr_perf_write_credit_cnt.attr.attr, + &ddr_perf_read_command.attr.attr, + &ddr_perf_write_command.attr.attr, + &ddr_perf_read_modify_write_command.attr.attr, + &ddr_perf_hp_read.attr.attr, + &ddr_perf_hp_req_nocredit.attr.attr, + &ddr_perf_hp_xact_credit.attr.attr, + &ddr_perf_lp_req_nocredit.attr.attr, + &ddr_perf_lp_xact_credit.attr.attr, + &ddr_perf_wr_xact_credit.attr.attr, + &ddr_perf_read_cycles.attr.attr, + &ddr_perf_write_cycles.attr.attr, + &ddr_perf_read_write_transition.attr.attr, + &ddr_perf_precharge.attr.attr, + &ddr_perf_activate.attr.attr, + &ddr_perf_load_mode.attr.attr, + &ddr_perf_mwr.attr.attr, + &ddr_perf_read.attr.attr, + &ddr_perf_read_activate.attr.attr, + &ddr_perf_refresh.attr.attr, + &ddr_perf_write.attr.attr, + &ddr_perf_raw_hazard.attr.attr, + NULL, +}; + +static struct attribute_group ddr_perf_events_attr_group = { + .name = "events", + .attrs = ddr_perf_events_attrs, +}; + +PMU_FORMAT_ATTR(event, "config:0-63"); + +static struct attribute *ddr_perf_format_attrs[] = { + &format_attr_event.attr, + NULL, +}; + +static struct attribute_group ddr_perf_format_attr_group = { + .name = "format", + .attrs = ddr_perf_format_attrs, +}; + +static const struct attribute_group *attr_groups[] = { + &ddr_perf_events_attr_group, + &ddr_perf_format_attr_group, + &ddr_perf_cpumask_attr_group, + NULL, +}; + +static u32 ddr_perf_alloc_counter(struct ddr_pmu *pmu, int event) +{ + int i; + + /* + * Always map cycle event to counter 0 + * Cycles counter is dedicated for cycle event + * can't used for the other events + */ + if (event == EVENT_CYCLES_ID) { + if (pmu->events[EVENT_CYCLES_COUNTER] == NULL) + return EVENT_CYCLES_COUNTER; + else + return -ENOENT; + } + + for (i = 1; i < NUM_COUNTERS; i++) { + if (pmu->events[i] == NULL) + return i; + } + + return -ENOENT; +} + +static u32 ddr_perf_free_counter(struct ddr_pmu *pmu, int counter) +{ + pmu->events[counter] = NULL; + + return 0; +} + +static u32 ddr_perf_read_counter(struct ddr_pmu *pmu, int counter) +{ + return readl(pmu->base + COUNTER_READ + counter * 4); +} + +static int ddr_perf_event_init(struct perf_event *event) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + struct perf_event *sibling; + + if (event->attr.type != event->pmu->type) + return -ENOENT; + + if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) + return -EOPNOTSUPP; + + if (event->cpu < 0) { + dev_warn(pmu->dev, "Can't provide per-task data!\n"); + return -EOPNOTSUPP; + } + + if (event->attr.exclude_user || + event->attr.exclude_kernel || + event->attr.exclude_hv || + event->attr.exclude_idle || + event->attr.exclude_host || + event->attr.exclude_guest || + event->attr.sample_period) + return -EINVAL; + + /* + * We must NOT create groups containing mixed PMUs, although software + * events are acceptable (for example to create a CCN group + * periodically read when a hrtimer aka cpu-clock leader triggers). + */ + if (event->group_leader->pmu != event->pmu && + !is_software_event(event->group_leader)) + return -EINVAL; + + for_each_sibling_event(sibling, event->group_leader) { + if (sibling->pmu != event->pmu && + !is_software_event(sibling)) + return -EINVAL; + } + + event->cpu = pmu->cpu; + hwc->idx = -1; + + return 0; +} + + +static void ddr_perf_event_update(struct perf_event *event) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + u64 delta, prev_raw_count, new_raw_count; + int counter = hwc->idx; + + do { + prev_raw_count = local64_read(&hwc->prev_count); + new_raw_count = ddr_perf_read_counter(pmu, counter); + } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count, + new_raw_count) != prev_raw_count); + + delta = (new_raw_count - prev_raw_count) & 0xFFFFFFFF; + + local64_add(delta, &event->count); +} + +static void ddr_perf_event_enable(struct ddr_pmu *pmu, int config, + int counter, bool enable) +{ + u8 reg = counter * 4 + COUNTER_CNTL; + int val; + + if (enable) { + /* + * must disable first, then enable again + * otherwise, cycle counter will not work + * if previous state is enabled. + */ + writel(0, pmu->base + reg); + val = CNTL_EN | CNTL_CLEAR; + val |= (config << CNTL_CSV_SHIFT) & CNTL_CSV_MASK; + } else { + /* Disable counter */ + val = readl(pmu->base + reg) & CNTL_EN_MASK; + } + + writel(val, pmu->base + reg); +} + +static void ddr_perf_event_start(struct perf_event *event, int flags) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + int counter = hwc->idx; + + local64_set(&hwc->prev_count, 0); + + ddr_perf_event_enable(pmu, event->attr.config, counter, true); +} + +static int ddr_perf_event_add(struct perf_event *event, int flags) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + int counter; + int cfg = event->attr.config; + + counter = ddr_perf_alloc_counter(pmu, cfg); + if (counter < 0) { + dev_dbg(pmu->dev, "There are not enough counters\n"); + return -EOPNOTSUPP; + } + + pmu->events[counter] = event; + pmu->active_events++; + hwc->idx = counter; + + if (flags & PERF_EF_START) + ddr_perf_event_start(event, flags); + + local64_set(&hwc->prev_count, ddr_perf_read_counter(pmu, counter)); + + return 0; +} + +static void ddr_perf_event_stop(struct perf_event *event, int flags) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + int counter = hwc->idx; + + ddr_perf_event_enable(pmu, event->attr.config, counter, false); + ddr_perf_event_update(event); +} + +static void ddr_perf_event_del(struct perf_event *event, int flags) +{ + struct ddr_pmu *pmu = to_ddr_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + int counter = hwc->idx; + + ddr_perf_event_stop(event, PERF_EF_UPDATE); + + ddr_perf_free_counter(pmu, counter); + pmu->active_events--; + hwc->idx = -1; +} + +static void ddr_perf_pmu_enable(struct pmu *pmu) +{ + struct ddr_pmu *ddr_pmu = to_ddr_pmu(pmu); + + /* enable cycle counter if cycle is not active event list */ + if (ddr_pmu->events[EVENT_CYCLES_COUNTER] == NULL) + ddr_perf_event_enable(ddr_pmu, + EVENT_CYCLES_ID, + EVENT_CYCLES_COUNTER, + true); +} + +static void ddr_perf_pmu_disable(struct pmu *pmu) +{ + struct ddr_pmu *ddr_pmu = to_ddr_pmu(pmu); + + if (ddr_pmu->events[EVENT_CYCLES_COUNTER] == NULL) + ddr_perf_event_enable(ddr_pmu, + EVENT_CYCLES_ID, + EVENT_CYCLES_COUNTER, + false); +} + +static int ddr_perf_init(struct ddr_pmu *pmu, void __iomem *base, + struct device *dev) +{ + *pmu = (struct ddr_pmu) { + .pmu = (struct pmu) { + .task_ctx_nr = perf_invalid_context, + .attr_groups = attr_groups, + .event_init = ddr_perf_event_init, + .add = ddr_perf_event_add, + .del = ddr_perf_event_del, + .start = ddr_perf_event_start, + .stop = ddr_perf_event_stop, + .read = ddr_perf_event_update, + .pmu_enable = ddr_perf_pmu_enable, + .pmu_disable = ddr_perf_pmu_disable, + }, + .base = base, + .dev = dev, + }; + + pmu->id = ida_simple_get(&ddr_ida, 0, 0, GFP_KERNEL); + return pmu->id; +} + +static irqreturn_t ddr_perf_irq_handler(int irq, void *p) +{ + int i; + struct ddr_pmu *pmu = (struct ddr_pmu *) p; + struct perf_event *event, *cycle_event = NULL; + + /* all counter will stop if cycle counter disabled */ + ddr_perf_event_enable(pmu, + EVENT_CYCLES_ID, + EVENT_CYCLES_COUNTER, + false); + /* + * When the cycle counter overflows, all counters are stopped, + * and an IRQ is raised. If any other counter overflows, it + * continues counting, and no IRQ is raised. + * + * Cycles occur at least 4 times as often as other events, so we + * can update all events on a cycle counter overflow and not + * lose events. + * + */ + for (i = 0; i < NUM_COUNTERS; i++) { + + if (!pmu->events[i]) + continue; + + event = pmu->events[i]; + + ddr_perf_event_update(event); + + if (event->hw.idx == EVENT_CYCLES_COUNTER) + cycle_event = event; + } + + ddr_perf_event_enable(pmu, + EVENT_CYCLES_ID, + EVENT_CYCLES_COUNTER, + true); + if (cycle_event) + ddr_perf_event_update(cycle_event); + + return IRQ_HANDLED; +} + +static int ddr_perf_offline_cpu(unsigned int cpu, struct hlist_node *node) +{ + struct ddr_pmu *pmu = hlist_entry_safe(node, struct ddr_pmu, node); + int target; + + if (cpu != pmu->cpu) + return 0; + + target = cpumask_any_but(cpu_online_mask, cpu); + if (target >= nr_cpu_ids) + return 0; + + perf_pmu_migrate_context(&pmu->pmu, cpu, target); + pmu->cpu = target; + + WARN_ON(irq_set_affinity_hint(pmu->irq, cpumask_of(pmu->cpu))); + + return 0; +} + +static int ddr_perf_probe(struct platform_device *pdev) +{ + struct ddr_pmu *pmu; + struct device_node *np; + void __iomem *base; + struct resource *iomem; + char *name; + char *hpname; + int num; + int ret; + int irq; + + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, iomem); + if (IS_ERR(base)) + return PTR_ERR(base); + + np = pdev->dev.of_node; + + pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); + if (!pmu) + return -ENOMEM; + + num = ddr_perf_init(pmu, base, &pdev->dev); + + platform_set_drvdata(pdev, pmu); + + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "ddr%d", num); + if (!name) + return -ENOMEM; + + hpname = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "perf/imx/ddr%d:online", num); + if (!hpname) + return -ENOMEM; + + pmu->cpu = raw_smp_processor_id(); + ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, hpname, NULL, + ddr_perf_offline_cpu); + + if (ret < 0) { + dev_err(&pdev->dev, "cpuhp_setup_state_multi failed\n"); + goto ddr_perf_err; + } + + pmu->cpuhp_state = ret; + + /* Register the pmu instance for cpu hotplug */ + cpuhp_state_add_instance_nocalls(pmu->cpuhp_state, &pmu->node); + + ret = perf_pmu_register(&pmu->pmu, name, -1); + if (ret) + goto ddr_perf_err; + + /* Request irq */ + irq = of_irq_get(np, 0); + if (irq < 0) { + dev_err(&pdev->dev, "Failed to get irq: %d", irq); + ret = irq; + goto ddr_perf_irq_err; + } + + ret = devm_request_irq(&pdev->dev, irq, + ddr_perf_irq_handler, + IRQF_NOBALANCING | IRQF_NO_THREAD, + DDR_PERF_DEV_NAME, + pmu); + if (ret < 0) { + dev_err(&pdev->dev, "Request irq failed: %d", ret); + goto ddr_perf_irq_err; + } + + pmu->irq = irq; + ret = irq_set_affinity_hint(pmu->irq, cpumask_of(pmu->cpu)); + if (ret) { + dev_err(pmu->dev, "Failed to set interrupt affinity!\n"); + goto ddr_perf_irq_err; + } + + return 0; + +ddr_perf_irq_err: + perf_pmu_unregister(&(pmu->pmu)); + +ddr_perf_err: + if (pmu->cpuhp_state) + cpuhp_state_remove_instance_nocalls(pmu->cpuhp_state, &pmu->node); + + ida_simple_remove(&ddr_ida, pmu->id); + dev_warn(&pdev->dev, "i.MX8 DDR Perf PMU failed (%d), disabled\n", ret); + return ret; +} + +static int ddr_perf_remove(struct platform_device *pdev) +{ + struct ddr_pmu *pmu = platform_get_drvdata(pdev); + + cpuhp_state_remove_instance_nocalls(pmu->cpuhp_state, &pmu->node); + irq_set_affinity_hint(pmu->irq, NULL); + + perf_pmu_unregister(&pmu->pmu); + + ida_simple_remove(&ddr_ida, pmu->id); + return 0; +} + +static struct platform_driver imx_ddr_pmu_driver = { + .driver = { + .name = "imx-ddr-pmu", + .of_match_table = imx_ddr_pmu_dt_ids, + }, + .probe = ddr_perf_probe, + .remove = ddr_perf_remove, +}; + +module_platform_driver(imx_ddr_pmu_driver); +MODULE_LICENSE("GPL v2");