From patchwork Fri Mar 6 07:23:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 11423255 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5E15D174A for ; Fri, 6 Mar 2020 07:23:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 238DC2072D for ; Fri, 6 Mar 2020 07:23:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="mOVHtvU5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726054AbgCFHX5 (ORCPT ); Fri, 6 Mar 2020 02:23:57 -0500 Received: from mail27.static.mailgun.info ([104.130.122.27]:37927 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725867AbgCFHX5 (ORCPT ); Fri, 6 Mar 2020 02:23:57 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1583479436; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=WwIC9dK0CQjPL1gQA0Gz1qgNTJ1LTHoPFpiHZNHmCUM=; b=mOVHtvU5cqf6Ry5zYyYOBVNCBXKI1azICL1gA8qqvuUSekmAT8oNN0Tka4v8t6kmAH+OclZz P5DP0UHQz1JEc4hSBHuUryWCJdKhMaoEQUtBRkO6UlCv496oUZLRX5FuMEHJxHB6EYPISLYU K/rrCAys/Ycj87YbH110cH175uU= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e61fa87.7f0c06f73308-smtp-out-n01; Fri, 06 Mar 2020 07:23:51 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id A40A2C433BA; Fri, 6 Mar 2020 07:23:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mkshah-linux.qualcomm.com (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mkshah) by smtp.codeaurora.org (Postfix) with ESMTPSA id 89203C43636; Fri, 6 Mar 2020 07:23:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 89203C43636 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=mkshah@codeaurora.org From: Maulik Shah To: swboyd@chromium.org, mka@chromium.org, evgreen@chromium.org, bjorn.andersson@linaro.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, agross@kernel.org, dianders@chromium.org, rnayak@codeaurora.org, ilina@codeaurora.org, lsrao@codeaurora.org, Mahesh Sivasubramanian , Maulik Shah Subject: [PATCH v3 2/4] soc: qcom: Add SoC sleep stats driver Date: Fri, 6 Mar 2020 12:53:30 +0530 Message-Id: <1583479412-18320-3-git-send-email-mkshah@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583479412-18320-1-git-send-email-mkshah@codeaurora.org> References: <1583479412-18320-1-git-send-email-mkshah@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Mahesh Sivasubramanian Let's add a driver to read the the stats from remote processor and export to debugfs. The driver creates "soc_sleep_stats" directory in debugfs and adds files for various low power mode available. Below is sample output with command cat /sys/kernel/debug/soc_sleep_stats/ddr count = 0 Last Entered At = 0 Last Exited At = 0 Accumulated Duration = 0 Signed-off-by: Mahesh Sivasubramanian Signed-off-by: Lina Iyer Signed-off-by: Maulik Shah --- drivers/soc/qcom/Kconfig | 9 ++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/soc_sleep_stats.c | 248 +++++++++++++++++++++++++++++++++++++ 3 files changed, 258 insertions(+) create mode 100644 drivers/soc/qcom/soc_sleep_stats.c diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index d0a73e7..08bc0df3 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -185,6 +185,15 @@ config QCOM_SOCINFO Say yes here to support the Qualcomm socinfo driver, providing information about the SoC to user space. +config QCOM_SOC_SLEEP_STATS + tristate "Qualcomm Technologies, Inc. (QTI) SoC sleep stats driver" + depends on ARCH_QCOM && DEBUG_FS || COMPILE_TEST + help + Qualcomm Technologies, Inc. (QTI) SoC sleep stats driver to read + the shared memory exported by the remote processor related to + various SoC level low power modes statistics and export to debugfs + interface. + config QCOM_WCNSS_CTRL tristate "Qualcomm WCNSS control driver" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 9fb35c8..e6bd052 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o obj-$(CONFIG_QCOM_SMP2P) += smp2p.o obj-$(CONFIG_QCOM_SMSM) += smsm.o obj-$(CONFIG_QCOM_SOCINFO) += socinfo.o +obj-$(CONFIG_QCOM_SOC_SLEEP_STATS) += soc_sleep_stats.o obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o obj-$(CONFIG_QCOM_APR) += apr.o obj-$(CONFIG_QCOM_LLCC) += llcc-qcom.o diff --git a/drivers/soc/qcom/soc_sleep_stats.c b/drivers/soc/qcom/soc_sleep_stats.c new file mode 100644 index 00000000..79a14d2 --- /dev/null +++ b/drivers/soc/qcom/soc_sleep_stats.c @@ -0,0 +1,248 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2011-2020, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define MODEM_ITEM_ID 605 +#define ADSP_ITEM_ID 606 +#define CDSP_ITEM_ID 607 +#define SLPI_ITEM_ID 608 +#define GPU_ITEM_ID 609 +#define DISPLAY_ITEM_ID 610 + +#define PID_APSS 0 +#define PID_MODEM 1 +#define PID_ADSP 2 +#define PID_SLPI 3 +#define PID_CDSP 5 + +#define NAME_LENGTH 5 + +#define STAT_TYPE_ADDR 0x0 +#define COUNT_ADDR 0x4 +#define LAST_ENTERED_AT_ADDR 0x8 +#define LAST_EXITED_AT_ADDR 0x10 +#define ACCUMULATED_ADDR 0x18 +#define CLIENT_VOTES_ADDR 0x1c + +struct subsystem_data { + const char *name; + u32 item_id; + u32 pid; +}; + +static struct subsystem_data subsystems[] = { + { "modem", MODEM_ITEM_ID, PID_MODEM }, + { "adsp", ADSP_ITEM_ID, PID_ADSP }, + { "cdsp", CDSP_ITEM_ID, PID_CDSP }, + { "slpi", SLPI_ITEM_ID, PID_SLPI }, + { "gpu", GPU_ITEM_ID, PID_APSS }, + { "display", DISPLAY_ITEM_ID, PID_APSS }, +}; + +struct stats_config { + unsigned int offset_addr; + unsigned int num_records; + bool appended_stats_avail; +}; + +static const struct stats_config *config; + +struct soc_sleep_stats_data { + phys_addr_t stats_base; + resource_size_t stats_size; + void __iomem *reg; + struct dentry *root; +}; + +struct entry { + u32 stat_type; + u32 count; + u64 last_entered_at; + u64 last_exited_at; + u64 accumulated; +}; + +struct appended_entry { + u32 client_votes; + u32 reserved[3]; +}; + +static void print_sleep_stats(struct seq_file *s, struct entry *e) +{ + seq_printf(s, "Count = %u\n", e->count); + seq_printf(s, "Last Entered At = %llu\n", e->last_entered_at); + seq_printf(s, "Last Exited At = %llu\n", e->last_exited_at); + seq_printf(s, "Accumulated Duration = %llu\n", e->accumulated); +} + +static int subsystem_sleep_stats_show(struct seq_file *s, void *d) +{ + struct subsystem_data *subsystem = s->private; + struct entry *e; + + e = qcom_smem_get(subsystem->pid, subsystem->item_id, NULL); + if (IS_ERR(e)) + return PTR_ERR(e); + + /* + * If a subsystem is in sleep when reading the sleep stats adjust + * the accumulated sleep duration to show actual sleep time. + */ + if (e->last_entered_at > e->last_exited_at) + e->accumulated += (arch_timer_read_counter() + - e->last_entered_at); + + print_sleep_stats(s, e); + + return 0; +} + +static int soc_sleep_stats_show(struct seq_file *s, void *d) +{ + void __iomem *reg = s->private; + struct entry e; + + e.count = readl_relaxed(reg + COUNT_ADDR); + e.last_entered_at = readq_relaxed(reg + LAST_ENTERED_AT_ADDR); + e.last_exited_at = readq_relaxed(reg + LAST_EXITED_AT_ADDR); + e.accumulated = readq_relaxed(reg + ACCUMULATED_ADDR); + + print_sleep_stats(s, &e); + + if (config->appended_stats_avail) { + struct appended_entry ae; + + ae.client_votes = readl_relaxed(reg + CLIENT_VOTES_ADDR); + seq_printf(s, "Client_votes = %#x\n", ae.client_votes); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(soc_sleep_stats); +DEFINE_SHOW_ATTRIBUTE(subsystem_sleep_stats); + +static void create_debugfs_entries(struct soc_sleep_stats_data *drv) +{ + struct entry *e; + char stat_type[NAME_LENGTH] = {0}; + u32 offset, type; + int i; + + drv->root = debugfs_create_dir("soc_sleep_stats", NULL); + + for (i = 0; i < config->num_records; i++) { + offset = STAT_TYPE_ADDR + (i * sizeof(struct entry)); + + if (config->appended_stats_avail) + offset += i * sizeof(struct appended_entry); + + type = le32_to_cpu(readl_relaxed(drv->reg + offset)); + memcpy(stat_type, &type, sizeof(u32)); + debugfs_create_file(stat_type, 0444, drv->root, + drv->reg + offset, + &soc_sleep_stats_fops); + } + + for (i = 0; i < ARRAY_SIZE(subsystems); i++) { + e = qcom_smem_get(subsystems[i].pid, subsystems[i].item_id, + NULL); + + if (IS_ERR(e)) + continue; + + debugfs_create_file(subsystems[i].name, 0444, drv->root, + &subsystems[i], + &subsystem_sleep_stats_fops); + } +} + +static int soc_sleep_stats_probe(struct platform_device *pdev) +{ + struct soc_sleep_stats_data *drv; + struct resource *res; + void __iomem *offset_addr; + + drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); + if (!drv) + return -ENOMEM; + + config = device_get_match_data(&pdev->dev); + if (!config) + return -ENODEV; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return PTR_ERR(res); + + offset_addr = devm_ioremap(&pdev->dev, + res->start + config->offset_addr, + sizeof(u32)); + if (IS_ERR(offset_addr)) + return PTR_ERR(offset_addr); + + drv->stats_base = res->start | readl_relaxed(offset_addr); + drv->stats_size = resource_size(res); + devm_iounmap(&pdev->dev, offset_addr); + + drv->reg = devm_ioremap(&pdev->dev, drv->stats_base, drv->stats_size); + if (!drv->reg) + return -ENOMEM; + + create_debugfs_entries(drv); + platform_set_drvdata(pdev, drv); + + return 0; +} + +static int soc_sleep_stats_remove(struct platform_device *pdev) +{ + struct soc_sleep_stats_data *drv = platform_get_drvdata(pdev); + + debugfs_remove_recursive(drv->root); + + return 0; +} + +static const struct stats_config rpm_data = { + .offset_addr = 0x14, + .num_records = 2, + .appended_stats_avail = true, +}; + +static const struct stats_config rpmh_data = { + .offset_addr = 0x4, + .num_records = 3, + .appended_stats_avail = false, +}; + +static const struct of_device_id soc_sleep_stats_table[] = { + { .compatible = "qcom,rpm-sleep-stats", .data = &rpm_data}, + { .compatible = "qcom,rpmh-sleep-stats", .data = &rpmh_data}, + { } +}; + +static struct platform_driver soc_sleep_stats_driver = { + .probe = soc_sleep_stats_probe, + .remove = soc_sleep_stats_remove, + .driver = { + .name = "soc_sleep_stats", + .of_match_table = soc_sleep_stats_table, + }, +}; +module_platform_driver(soc_sleep_stats_driver); + +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. (QTI) SoC Sleep Stats driver"); +MODULE_LICENSE("GPL v2");