From patchwork Tue Oct 5 09:11:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 12536031 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE6C3C433F5 for ; Tue, 5 Oct 2021 09:11:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D163261251 for ; Tue, 5 Oct 2021 09:11:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233482AbhJEJNs (ORCPT ); Tue, 5 Oct 2021 05:13:48 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:50751 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233400AbhJEJNq (ORCPT ); Tue, 5 Oct 2021 05:13:46 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1633425116; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=9+z1p/YJqWXqDL+xISWsonqDSg/8yzdbt9XdL2VfTfw=; b=fAvtJBMqeBEMkQJh2Ku5xgpGZCz4Qw2BYqAmFEck6GNIkSfcJ2Zi3EELJ47kEmfT4dXc1cYl jNncd9/zsxF1sj2QmzEbTlRduT02cd9iNMW8jRBIn4UFuEFN5Pmv/FPcRhTx7/lRFees1RWc 7F/6KonhCt7MA9z44TzueROhvF4= X-Mailgun-Sending-Ip: 69.72.43.7 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 smtp-out-n01.prod.us-east-1.postgun.com with SMTP id 615c16c0b62327f2cb377cb7 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 05 Oct 2021 09:11:28 GMT Sender: mkshah=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 4EFA4C4338F; Tue, 5 Oct 2021 09:11:27 +0000 (UTC) Received: from mkshah-linux.qualcomm.com (unknown [202.46.22.19]) (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 A02D3C43617; Tue, 5 Oct 2021 09:11:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org A02D3C43617 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=fail smtp.mailfrom=codeaurora.org From: Maulik Shah To: swboyd@chromium.org, mka@chromium.org, evgreen@chromium.org, bjorn.andersson@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, agross@kernel.org, dianders@chromium.org, linux@roeck-us.net, rnayak@codeaurora.org, lsrao@codeaurora.org, Mahesh Sivasubramanian , Lina Iyer , Maulik Shah Subject: [PATCH v10 2/5] soc: qcom: Add SoC sleep stats driver Date: Tue, 5 Oct 2021 14:41:02 +0530 Message-Id: <1633425065-7927-3-git-send-email-mkshah@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1633425065-7927-1-git-send-email-mkshah@codeaurora.org> References: <1633425065-7927-1-git-send-email-mkshah@codeaurora.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 stats from remote processor and export to debugfs. The driver creates "qcom_sleep_stats" directory in debugfs and adds files for various low power mode available. Below is sample output with command cat /sys/kernel/debug/qcom_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 [mkshah: add subsystem sleep stats, create one file for each stat] Signed-off-by: Maulik Shah --- drivers/soc/qcom/Kconfig | 10 ++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/qcom_sleep_stats.c | 240 ++++++++++++++++++++++++++++++++++++ 3 files changed, 251 insertions(+) create mode 100644 drivers/soc/qcom/qcom_sleep_stats.c diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index abfef20..ad45f59 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -182,6 +182,16 @@ config QCOM_SMSM Say yes here to support the Qualcomm Shared Memory State Machine. The state machine is represented by bits in shared memory. +config QCOM_SLEEP_STATS + tristate "Qualcomm Technologies, Inc. (QTI) Sleep stats driver" + depends on ARCH_QCOM && DEBUG_FS || COMPILE_TEST + depends on QCOM_SMEM + help + Qualcomm Technologies, Inc. (QTI) 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_SOCINFO tristate "Qualcomm socinfo driver" depends on QCOM_SMEM diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 24514c7..ad84f7b 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_QCOM_SMEM) += smem.o obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o obj-$(CONFIG_QCOM_SMP2P) += smp2p.o obj-$(CONFIG_QCOM_SMSM) += smsm.o +obj-$(CONFIG_QCOM_SLEEP_STATS) += qcom_sleep_stats.o obj-$(CONFIG_QCOM_SOCINFO) += socinfo.o obj-$(CONFIG_QCOM_SPM) += spm.o obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o diff --git a/drivers/soc/qcom/qcom_sleep_stats.c b/drivers/soc/qcom/qcom_sleep_stats.c new file mode 100644 index 0000000..c85e19b --- /dev/null +++ b/drivers/soc/qcom/qcom_sleep_stats.c @@ -0,0 +1,240 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2011-2021, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define STAT_TYPE_OFFSET 0x0 +#define COUNT_OFFSET 0x4 +#define LAST_ENTERED_AT_OFFSET 0x8 +#define LAST_EXITED_AT_OFFSET 0x10 +#define ACCUMULATED_OFFSET 0x18 +#define CLIENT_VOTES_OFFSET 0x1c + +struct subsystem_data { + const char *name; + u32 smem_item; + u32 pid; +}; + +static const struct subsystem_data subsystems[] = { + { "modem", 605, 1 }, + { "wpss", 605, 13 }, + { "adsp", 606, 2 }, + { "cdsp", 607, 5 }, + { "slpi", 608, 3 }, + { "gpu", 609, 0 }, + { "display", 610, 0 }, + { "adsp_island", 613, 2 }, + { "slpi_island", 613, 3 }, +}; + +struct stats_config { + size_t stats_offset; + size_t num_records; + bool appended_stats_avail; +}; + +struct stats_data { + bool appended_stats_avail; + void __iomem *base; +}; + +struct sleep_stats { + u32 stat_type; + u32 count; + u64 last_entered_at; + u64 last_exited_at; + u64 accumulated; +}; + +struct appended_stats { + u32 client_votes; + u32 reserved[3]; +}; + +static void qcom_print_stats(struct seq_file *s, const struct sleep_stats *stat) +{ + u64 accumulated = stat->accumulated; + /* + * If a subsystem is in sleep when reading the sleep stats adjust + * the accumulated sleep duration to show actual sleep time. + */ + if (stat->last_entered_at > stat->last_exited_at) + accumulated += arch_timer_read_counter() - stat->last_entered_at; + + seq_printf(s, "Count: %u\n", stat->count); + seq_printf(s, "Last Entered At: %llu\n", stat->last_entered_at); + seq_printf(s, "Last Exited At: %llu\n", stat->last_exited_at); + seq_printf(s, "Accumulated Duration: %llu\n", accumulated); +} + +static int qcom_subsystem_sleep_stats_show(struct seq_file *s, void *unused) +{ + struct subsystem_data *subsystem = s->private; + struct sleep_stats *stat; + + /* Items are allocated lazily, so lookup pointer each time */ + stat = qcom_smem_get(subsystem->pid, subsystem->smem_item, NULL); + if (IS_ERR(stat)) + return -EIO; + + qcom_print_stats(s, stat); + + return 0; +} + +static int qcom_soc_sleep_stats_show(struct seq_file *s, void *unused) +{ + struct stats_data *d = s->private; + void __iomem *reg = d->base; + struct sleep_stats stat; + + memcpy_fromio(&stat, reg, sizeof(stat)); + qcom_print_stats(s, &stat); + + if (d->appended_stats_avail) { + struct appended_stats votes; + + memcpy_fromio(&votes, reg + CLIENT_VOTES_OFFSET, sizeof(votes)); + seq_printf(s, "Client Votes: %#x\n", votes.client_votes); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(qcom_soc_sleep_stats); +DEFINE_SHOW_ATTRIBUTE(qcom_subsystem_sleep_stats); + +static void qcom_create_soc_sleep_stat_files(struct dentry *root, void __iomem *reg, + struct stats_data *d, + const struct stats_config *config) +{ + char stat_type[sizeof(u32) + 1] = {0}; + u32 offset = 0, type; + int i, j; + + for (i = 0; i < config->num_records; i++) { + d[i].base = reg + offset + config->stats_offset; + + /* + * Read the low power mode name and create debugfs file for it. + * The names read could be of below, + * (may change depending on low power mode supported). + * For rpmh-sleep-stats: "aosd", "cxsd" and "ddr". + * For rpm-sleep-stats: "vmin" and "vlow". + */ + type = readl(d[i].base); + for (j = 0; j < sizeof(u32); j++) { + stat_type[j] = type & 0xff; + type = type >> 8; + } + strim(stat_type); + debugfs_create_file(stat_type, 0400, root, &d[i], + &qcom_soc_sleep_stats_fops); + + offset += sizeof(struct sleep_stats); + if (d[i].appended_stats_avail) + offset += sizeof(struct appended_stats); + } +} + +static void qcom_create_subsystem_stat_files(struct dentry *root) +{ + const struct sleep_stats *stat; + int i; + + for (i = 0; i < ARRAY_SIZE(subsystems); i++) { + stat = qcom_smem_get(subsystems[i].pid, subsystems[i].smem_item, NULL); + if (IS_ERR(stat)) + continue; + + debugfs_create_file(subsystems[i].name, 0400, root, (void *)&subsystems[i], + &qcom_subsystem_sleep_stats_fops); + } +} + +static int qcom_sleep_stats_probe(struct platform_device *pdev) +{ + void __iomem *reg; + struct dentry *root; + const struct stats_config *config; + struct stats_data *d; + int i; + + config = device_get_match_data(&pdev->dev); + if (!config) + return -ENODEV; + + reg = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); + if (IS_ERR(reg)) + return -ENOMEM; + + d = devm_kcalloc(&pdev->dev, config->num_records, + sizeof(*d), GFP_KERNEL); + if (!d) + return -ENOMEM; + + for (i = 0; i < config->num_records; i++) + d[i].appended_stats_avail = config->appended_stats_avail; + + root = debugfs_create_dir("qcom_sleep_stats", NULL); + + qcom_create_subsystem_stat_files(root); + qcom_create_soc_sleep_stat_files(root, reg, d, config); + + platform_set_drvdata(pdev, root); + + return 0; +} + +static int qcom_sleep_stats_remove(struct platform_device *pdev) +{ + struct dentry *root = platform_get_drvdata(pdev); + + debugfs_remove_recursive(root); + + return 0; +} + +static const struct stats_config rpm_data = { + .stats_offset = 0x2e8, + .num_records = 2, + .appended_stats_avail = true, +}; + +static const struct stats_config rpmh_data = { + .stats_offset = 0x48, + .num_records = 3, + .appended_stats_avail = false, +}; + +static const struct of_device_id qcom_sleep_stats_table[] = { + { .compatible = "qcom,rpm-sleep-stats", .data = &rpm_data }, + { .compatible = "qcom,rpmh-sleep-stats", .data = &rpmh_data }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_sleep_stats_table); + +static struct platform_driver qcom_sleep_stats = { + .probe = qcom_sleep_stats_probe, + .remove = qcom_sleep_stats_remove, + .driver = { + .name = "qcom_sleep_stats", + .of_match_table = qcom_sleep_stats_table, + }, +}; +module_platform_driver(qcom_sleep_stats); + +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. (QTI) Sleep Stats driver"); +MODULE_LICENSE("GPL v2");