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[83.9.29.144]) by smtp.gmail.com with ESMTPSA id a23-20020a2e8317000000b002a79d7ceb93sm2925550ljh.9.2023.04.19.05.23.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 05:23:23 -0700 (PDT) From: Konrad Dybcio Date: Wed, 19 Apr 2023 14:23:20 +0200 Subject: [PATCH v5 1/2] dt-bindings: soc: qcom: Add RPM Master stats MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230405-topic-master_stats-v5-1-2e1c98a8b63e@linaro.org> References: <20230405-topic-master_stats-v5-0-2e1c98a8b63e@linaro.org> In-Reply-To: <20230405-topic-master_stats-v5-0-2e1c98a8b63e@linaro.org> To: Andy Gross , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Manivannan Sadhasivam , Krzysztof Kozlowski X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1681907001; l=3242; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=p+kMF2wI4gUD7vWxW6rNWesT2Ay4RZ53dQRi1h/ATdY=; b=q1DsNMEJ7vggCx+E2l6mlDctPkj30e8vrqGILNMEjQZu/dcOjiT04Xcutcj2BpdCzw+0QJ6FMmYB tA/Q3z4hDRcHlc8C0Y+YQ9jtMgZgAmn+vBk35D67i/yTOKGMZN10 X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The RPM MSG RAM contains per-RPM-master (e.g. APPS, ADSP etc.) sleep statistics. They let one assess which core is actively preventing the system from entering a true low-power mode. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Konrad Dybcio --- .../bindings/soc/qcom/qcom,rpm-master-stats.yaml | 69 ++++++++++++++++++= ++++ 1 file changed, 69 insertions(+) diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,rpm-master-sta= ts.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,rpm-master-stats.= yaml new file mode 100644 index 000000000000..8a654979ce92 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,rpm-master-stats.yaml @@ -0,0 +1,69 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/qcom/qcom,rpm-master-stats.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Technologies, Inc. (QTI) RPM Master Stats + +maintainers: + - Konrad Dybcio + +description: | + The Qualcomm RPM (Resource Power Manager) architecture includes a concept + of "RPM Masters". They can be thought of as "the local gang leaders", us= ually + spanning a single subsystem (e.g. APSS, ADSP, CDSP). All of the RPM deci= sons + (particularly around entering hardware-driven low power modes: XO shutdo= wn + and total system-wide power collapse) are first made at Master-level, and + only then aggregated for the entire system. + + The Master Stats provide a few useful bits that can be used to assess wh= ether + our device has entered the desired low-power mode, how long it took to d= o so, + the duration of that residence, how long it took to come back online, + how many times a given sleep state was entered and which cores are activ= ely + voting for staying awake. + + This scheme has been used on various SoCs in the 2013-2023 era, with some + newer or higher-end designs providing this information through an SMEM q= uery. + +properties: + compatible: + const: qcom,rpm-master-stats + + qcom,rpm-msg-ram: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: Phandle to an RPM MSG RAM slice containing the master sta= ts + minItems: 1 + maxItems: 5 + + qcom,master-names: + $ref: /schemas/types.yaml#/definitions/string-array + description: + The name of the RPM Master which owns the MSG RAM slice where this + instance of Master Stats resides + minItems: 1 + maxItems: 5 + +required: + - compatible + - qcom,rpm-msg-ram + - qcom,master-names + +additionalProperties: false + +examples: + - | + stats { + compatible =3D "qcom,rpm-master-stats"; + qcom,rpm-msg-ram =3D <&apss_master_stats>, + <&mpss_master_stats>, + <&adsp_master_stats>, + <&cdsp_master_stats>, + <&tz_master_stats>; + qcom,master-names =3D "APSS", + "MPSS", + "ADSP", + "CDSP", + "TZ"; + }; +... --=20 2.40.0 From nobody Wed Dec 17 13:36:27 2025 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 4EE91C77B73 for ; Wed, 19 Apr 2023 12:24:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233243AbjDSMXu (ORCPT ); Wed, 19 Apr 2023 08:23:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233222AbjDSMX3 (ORCPT ); Wed, 19 Apr 2023 08:23:29 -0400 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E97F646BA for ; Wed, 19 Apr 2023 05:23:26 -0700 (PDT) Received: by mail-lf1-x12a.google.com with SMTP id 2adb3069b0e04-4eed6ddcae1so443120e87.0 for ; Wed, 19 Apr 2023 05:23:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1681907004; x=1684499004; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=hPGiz4DXUUF5zE7ZJa4E2i3DA9cmsr64t3sVkYUckak=; b=liweVwjeZd7xiUNUU9zSgIRvEd1QCTNjuqzxoeX9TEHvyHiNNBNiR0e3gHsie/cHn7 tytPvmq/2aRPMSyQsMoRatN9WJPmT32IRi1IqPR3Yd30conXLsEBUq963Q3uH1zXyikq B66qwJtFeR0Des9gLUgVhbTinlsOHTGergRmJrezE8Y9Hy5B3pys1EvCZz615lB+hN43 SoH+5I/JkJeWrshWdACjjDcGiTkGZUs+MZmtFiximpfCqUqUrG4y6S3AHOYD8Iq2Y+32 c18AmPAH0rlAZV4A+IHE4m9EYql2nOCLbZei3WGWZatpPubZYCaexVDH4mfQ+/K1vK/a vgRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681907004; x=1684499004; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hPGiz4DXUUF5zE7ZJa4E2i3DA9cmsr64t3sVkYUckak=; b=CSTCkkb6h0rfabw/NOneGMTw4WdMUHL6jhZtEwIdK36cKCCeSS/hIIITEzucsPZdhG jM1Wb6dyiM5j1PxGI2kTPvjOrff1I1It5Lsuq973pb6xwwgh8c0RvoBx43SpVzuTqEbE 5h/Knweqfy/+qRMAbDUK5JgfnwPEE9OeB3u5PwR159orwnzYwpfYwazyD7hLomvrOHsB rGFgYXcTFnuEWcIXqc8KFvMyqv0g/pY/gp/W7eVOitOeEdCc36g7APuum2eQLJ37Wr2k yt/Cw3KSbUgMf+ftRTncY2kPlQUUKnyHQUBCHYSzxyf254yZ7zUrPf7mKXP8kRYg8UtV dUBw== X-Gm-Message-State: AAQBX9cQiqirhNYZ93LbdgUAVMN9ty+D2kM+F2dyRedSZCV60k1nQALA N2lx8J2OqryUwRG2b0uRjlAuzA== X-Google-Smtp-Source: AKy350bdUfr8EjCujHXiRsqGF2LhxlRAxkbhMDVdNFdrT5yw1pr7XoVoVvGL938plWbYX6jFJ7nTDA== X-Received: by 2002:a05:6512:3b9e:b0:4eb:2b62:134f with SMTP id g30-20020a0565123b9e00b004eb2b62134fmr839280lfv.16.1681907004648; Wed, 19 Apr 2023 05:23:24 -0700 (PDT) Received: from [192.168.1.101] (abyj144.neoplus.adsl.tpnet.pl. [83.9.29.144]) by smtp.gmail.com with ESMTPSA id a23-20020a2e8317000000b002a79d7ceb93sm2925550ljh.9.2023.04.19.05.23.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 05:23:24 -0700 (PDT) From: Konrad Dybcio Date: Wed, 19 Apr 2023 14:23:21 +0200 Subject: [PATCH v5 2/2] soc: qcom: Introduce RPM master stats driver MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230405-topic-master_stats-v5-2-2e1c98a8b63e@linaro.org> References: <20230405-topic-master_stats-v5-0-2e1c98a8b63e@linaro.org> In-Reply-To: <20230405-topic-master_stats-v5-0-2e1c98a8b63e@linaro.org> To: Andy Gross , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Manivannan Sadhasivam X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1681907001; l=7371; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=lu9hWbptuXcs6u63YrwqzkyEo5+uuMeZ/4yHbAj3l0A=; b=JAQ5Kizlv6bz0d4E19ajASoRzr3M3/5CffPL428gGFhxafH9fvfZyDhfXTDNeF1tBkySs1C4lb60 fL2bN+UEBeGI49nJCd3wdWk6AovX5zdLPXIyK4loILH+XdLdSN51 X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce a driver to query and expose detailed, per-subsystem (as opposed to the existing qcom_stats driver which exposes SoC-wide data) about low power mode states of a given RPM master. That includes the APSS (ARM), MPSS (modem) and other remote cores, depending on the platform configuration. This is a vastly cleaned up and restructured version of a similar driver found in msm-5.4. Signed-off-by: Konrad Dybcio Reviewed-by: Manivannan Sadhasivam --- drivers/soc/qcom/Kconfig | 11 +++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/rpm_master_stats.c | 163 ++++++++++++++++++++++++++++++++= ++++ 3 files changed, 175 insertions(+) diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index a491718f8064..e597799e8121 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -135,6 +135,17 @@ config QCOM_RMTFS_MEM =20 Say y here if you intend to boot the modem remoteproc. =20 +config QCOM_RPM_MASTER_STATS + tristate "Qualcomm RPM Master stats" + depends on ARCH_QCOM || COMPILE_TEST + help + The RPM Master sleep stats driver provides detailed per-subsystem + sleep/wake data, read from the RPM message RAM. It can be used to + assess whether all the low-power modes available are entered as + expected or to check which part of the SoC prevents it from sleeping. + + Say y here if you intend to debug or monitor platform sleep. + config QCOM_RPMH tristate "Qualcomm RPM-Hardened (RPMH) Communication" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 0f43a88b4894..7349371fdea1 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_QCOM_QMI_HELPERS) +=3D qmi_helpers.o qmi_helpers-y +=3D qmi_encdec.o qmi_interface.o obj-$(CONFIG_QCOM_RAMP_CTRL) +=3D ramp_controller.o obj-$(CONFIG_QCOM_RMTFS_MEM) +=3D rmtfs_mem.o +obj-$(CONFIG_QCOM_RPM_MASTER_STATS) +=3D rpm_master_stats.o obj-$(CONFIG_QCOM_RPMH) +=3D qcom_rpmh.o qcom_rpmh-y +=3D rpmh-rsc.o qcom_rpmh-y +=3D rpmh.o diff --git a/drivers/soc/qcom/rpm_master_stats.c b/drivers/soc/qcom/rpm_mas= ter_stats.c new file mode 100644 index 000000000000..6dd98b9f7129 --- /dev/null +++ b/drivers/soc/qcom/rpm_master_stats.c @@ -0,0 +1,163 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + * Copyright (c) 2023, Linaro Limited + * + * This driver supports what is known as "Master Stats v2" in Qualcomm + * downstream kernel terms, which seems to be the only version which has + * ever shipped, all the way from 2013 to 2023. + */ + +#include +#include +#include +#include +#include +#include + +struct master_stats_data { + void __iomem *base; + const char *label; +}; + +struct rpm_master_stats { + u32 active_cores; + u32 num_shutdowns; + u64 shutdown_req; + u64 wakeup_idx; + u64 bringup_req; + u64 bringup_ack; + u32 wakeup_reason; /* 0 =3D "rude wakeup", 1 =3D scheduled wakeup */ + u32 last_sleep_trans_dur; + u32 last_wake_trans_dur; + + /* Per-subsystem (*not necessarily* SoC-wide) XO shutdown stats */ + u32 xo_count; + u64 xo_last_enter; + u64 last_exit; + u64 xo_total_dur; +} __packed; + +static int master_stats_show(struct seq_file *s, void *unused) +{ + struct master_stats_data *data =3D s->private; + struct rpm_master_stats stat; + + memcpy_fromio(&stat, data->base, sizeof(stat)); + + seq_printf(s, "%s:\n", data->label); + + seq_printf(s, "\tLast shutdown @ %llu\n", stat.shutdown_req); + seq_printf(s, "\tLast bringup req @ %llu\n", stat.bringup_req); + seq_printf(s, "\tLast bringup ack @ %llu\n", stat.bringup_ack); + seq_printf(s, "\tLast wakeup idx: %llu\n", stat.wakeup_idx); + seq_printf(s, "\tLast XO shutdown enter @ %llu\n", stat.xo_last_enter); + seq_printf(s, "\tLast XO shutdown exit @ %llu\n", stat.last_exit); + seq_printf(s, "\tXO total duration: %llu\n", stat.xo_total_dur); + seq_printf(s, "\tLast sleep transition duration: %u\n", stat.last_sleep_t= rans_dur); + seq_printf(s, "\tLast wake transition duration: %u\n", stat.last_wake_tra= ns_dur); + seq_printf(s, "\tXO shutdown count: %u\n", stat.xo_count); + seq_printf(s, "\tWakeup reason: 0x%x\n", stat.wakeup_reason); + seq_printf(s, "\tShutdown count: %u\n", stat.num_shutdowns); + seq_printf(s, "\tActive cores bitmask: 0x%x\n", stat.active_cores); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(master_stats); + +static int master_stats_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct master_stats_data *data; + struct device_node *msgram_np; + struct dentry *dent, *root; + struct resource res; + int count, i, ret; + + count =3D of_property_count_strings(dev->of_node, "qcom,master-names"); + if (count < 0) + return count; + + data =3D devm_kzalloc(dev, count * sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + root =3D debugfs_create_dir("qcom_rpm_master_stats", NULL); + platform_set_drvdata(pdev, root); + + for (i =3D 0; i < count; i++) { + msgram_np =3D of_parse_phandle(dev->of_node, "qcom,rpm-msg-ram", i); + if (!msgram_np) { + debugfs_remove_recursive(root); + return dev_err_probe(dev, -ENODEV, + "Couldn't parse MSG RAM phandle idx %d", i); + } + + /* + * Purposefully skip devm_platform helpers as we're using a + * shared resource. + */ + ret =3D of_address_to_resource(msgram_np, 0, &res); + of_node_put(msgram_np); + if (ret < 0) { + debugfs_remove_recursive(root); + return ret; + } + + data[i].base =3D devm_ioremap(dev, res.start, resource_size(&res)); + if (IS_ERR(data[i].base)) { + debugfs_remove_recursive(root); + return dev_err_probe(dev, -EINVAL, + "Could not map the MSG RAM slice idx %d!\n", i); + } + + ret =3D of_property_read_string_index(dev->of_node, "qcom,master-names",= i, + &data[i].label); + if (ret < 0) { + debugfs_remove_recursive(root); + return dev_err_probe(dev, ret, + "Could not read name idx %d!\n", i); + } + + /* + * Generally it's not advised to fail on debugfs errors, but this + * driver's only job is exposing data therein. + */ + dent =3D debugfs_create_file(data[i].label, 0444, root, + &data[i], &master_stats_fops); + if (IS_ERR(dent)) { + debugfs_remove_recursive(root); + return dev_err_probe(dev, PTR_ERR(dent), + "Failed to create debugfs file %s!\n", data[i].label); + } + } + + device_set_pm_not_required(dev); + + return 0; +} + +static void master_stats_remove(struct platform_device *pdev) +{ + struct dentry *root =3D platform_get_drvdata(pdev); + + debugfs_remove_recursive(root); +} + +static const struct of_device_id rpm_master_table[] =3D { + { .compatible =3D "qcom,rpm-master-stats" }, + { }, +}; + +static struct platform_driver master_stats_driver =3D { + .probe =3D master_stats_probe, + .remove_new =3D master_stats_remove, + .driver =3D { + .name =3D "qcom_rpm_master_stats", + .of_match_table =3D rpm_master_table, + }, +}; +module_platform_driver(master_stats_driver); + +MODULE_DESCRIPTION("Qualcomm RPM Master Statistics driver"); +MODULE_LICENSE("GPL"); --=20 2.40.0