From patchwork Fri Feb 24 09:06:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 94421 Delivered-To: patch@linaro.org Received: by 10.140.20.99 with SMTP id 90csp601391qgi; Fri, 24 Feb 2017 01:14:14 -0800 (PST) X-Received: by 10.99.172.2 with SMTP id v2mr2200641pge.100.1487927654352; Fri, 24 Feb 2017 01:14:14 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id r19si6851451pfe.12.2017.02.24.01.14.13; Fri, 24 Feb 2017 01:14:14 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751486AbdBXJOM (ORCPT + 25 others); Fri, 24 Feb 2017 04:14:12 -0500 Received: from mail-pg0-f48.google.com ([74.125.83.48]:36044 "EHLO mail-pg0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750964AbdBXJOA (ORCPT ); Fri, 24 Feb 2017 04:14:00 -0500 Received: by mail-pg0-f48.google.com with SMTP id s67so9311439pgb.3 for ; Fri, 24 Feb 2017 01:13:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=Wb+4LPqYIclTuLyYI4AM0nB+s84Fuy3x4FkaxOpSvB4=; b=PIldqzhHNtNFXqA2bLcNVMn4SuF/VnooJ5AG8y9Sef3uCd5ZjXHQJdOq3cxWPpTnT5 hn+grHEXNVg+9Vy/13rrbD0wfvLXHWUBn9UzKBXwFreTj/SJLsxJoubCEACddXt/Mecf qwo9cF/EsV4Ukvr9PeWnZ7TY+p9HW3lKeXj+w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=Wb+4LPqYIclTuLyYI4AM0nB+s84Fuy3x4FkaxOpSvB4=; b=j85RDfsDpyGPXlm+SiqCYCXmbXZWymQ5blk4dDVuuTlGI8uYPFOmKmCfIR/qcyxGwk p4Q2c7b8ZzW9H527+ROfVPIHxK+S1EVYa4EAjZwOXldwDQ/UnNgXOgAuuv4Y5nvejpDT VLXYG+0qXAa+Wn1r97+JAlW38y3Jc7jHSl5EItkbOKW1qc7/05IEenBAX8oslprbd3wv whQGWmpkx8y7NE3wdR0ptUEI46CTv4A6zB9ik/1x4LxNMW+jI47X376R/dodd76ms8y1 9nGnU2OOaOR6OUha1fZWAJnlYePOIEF3rTkrugVdEnU2BGwefwrJrL/Vht8OQ4lgffyt E3fw== X-Gm-Message-State: AMke39mcMQHvo+gjIyO4npyuZOiyXfiB7Ur8XgJ5hifZmidLH4cJZAPOxs+hZ3Yqf23gg1ob X-Received: by 10.99.115.71 with SMTP id d7mr2177851pgn.56.1487927215105; Fri, 24 Feb 2017 01:06:55 -0800 (PST) Received: from localhost ([122.172.165.189]) by smtp.gmail.com with ESMTPSA id 64sm13882531pfq.112.2017.02.24.01.06.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 Feb 2017 01:06:54 -0800 (PST) From: Viresh Kumar To: Rafael Wysocki , ulf.hansson@linaro.org, Kevin Hilman , Kevin Hilman , Pavel Machek , Len Brown Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Stephen Boyd , Nishanth Menon , Vincent Guittot , robh+dt@kernel.org, lina.iyer@linaro.org, rnayak@codeaurora.org, Viresh Kumar Subject: [PATCH V3 3/7] PM / QOS: Keep common notifier list for genpd constraints Date: Fri, 24 Feb 2017 14:36:35 +0530 Message-Id: <851a8ddd4b30e632f2491fc034c62a0b0ebcccfa.1487926924.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 2.7.1.410.g6faf27b In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Only the resume_latency constraint uses the notifiers right now. In order to prepare for adding new constraint types with notifiers, move to a common notifier list. Update pm_qos_update_target() to pass a pointer to the constraint structure to the notifier callbacks. Also update the notifier callbacks as well to error out for unexpected constraints. Signed-off-by: Viresh Kumar Tested-by: Rajendra Nayak --- drivers/base/power/domain.c | 26 +++++++++++++++++++------- drivers/base/power/qos.c | 15 ++++----------- include/linux/pm_qos.h | 7 +++++++ kernel/power/qos.c | 2 +- 4 files changed, 31 insertions(+), 19 deletions(-) -- 2.7.1.410.g6faf27b diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index e697dec9d25b..303490ab5ffd 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -416,14 +416,10 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth) return ret; } -static int genpd_dev_pm_qos_notifier(struct notifier_block *nb, - unsigned long val, void *ptr) +static int __resume_latency_notifier(struct generic_pm_domain_data *gpd_data, + unsigned long val) { - struct generic_pm_domain_data *gpd_data; - struct device *dev; - - gpd_data = container_of(nb, struct generic_pm_domain_data, nb); - dev = gpd_data->base.dev; + struct device *dev = gpd_data->base.dev; for (;;) { struct generic_pm_domain *genpd; @@ -456,6 +452,22 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb, return NOTIFY_DONE; } +static int genpd_dev_pm_qos_notifier(struct notifier_block *nb, + unsigned long val, void *ptr) +{ + struct generic_pm_domain_data *gpd_data; + struct device *dev; + + gpd_data = container_of(nb, struct generic_pm_domain_data, nb); + dev = gpd_data->base.dev; + + if (dev_pm_qos_notifier_is_resume_latency(dev, ptr)) + return __resume_latency_notifier(gpd_data, val); + + dev_err(dev, "%s: Unexpected notifier call\n", __func__); + return NOTIFY_BAD; +} + /** * genpd_power_off_work_fn - Power off PM domain whose subdomain count is 0. * @work: Work structure used for scheduling the execution of this function. diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 271bec73185e..851fff60319c 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -173,18 +173,12 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) { struct dev_pm_qos *qos; struct pm_qos_constraints *c; - struct blocking_notifier_head *n; qos = kzalloc(sizeof(*qos), GFP_KERNEL); if (!qos) return -ENOMEM; - n = kzalloc(sizeof(*n), GFP_KERNEL); - if (!n) { - kfree(qos); - return -ENOMEM; - } - BLOCKING_INIT_NOTIFIER_HEAD(n); + BLOCKING_INIT_NOTIFIER_HEAD(&qos->notifiers); c = &qos->resume_latency; plist_head_init(&c->list); @@ -192,7 +186,7 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) c->default_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->no_constraint_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->type = PM_QOS_MIN; - c->notifiers = n; + c->notifiers = &qos->notifiers; c = &qos->latency_tolerance; plist_head_init(&c->list); @@ -269,7 +263,6 @@ void dev_pm_qos_constraints_destroy(struct device *dev) dev->power.qos = ERR_PTR(-ENODEV); spin_unlock_irq(&dev->power.lock); - kfree(qos->resume_latency.notifiers); kfree(qos); out: @@ -488,7 +481,7 @@ int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier) ret = dev_pm_qos_constraints_allocate(dev); if (!ret) - ret = blocking_notifier_chain_register(dev->power.qos->resume_latency.notifiers, + ret = blocking_notifier_chain_register(&dev->power.qos->notifiers, notifier); mutex_unlock(&dev_pm_qos_mtx); @@ -515,7 +508,7 @@ int dev_pm_qos_remove_notifier(struct device *dev, /* Silently return if the constraints object is not present. */ if (!IS_ERR_OR_NULL(dev->power.qos)) - retval = blocking_notifier_chain_unregister(dev->power.qos->resume_latency.notifiers, + retval = blocking_notifier_chain_unregister(&dev->power.qos->notifiers, notifier); mutex_unlock(&dev_pm_qos_mtx); diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 3e2547d6e207..dd02020a02b6 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -100,6 +100,7 @@ struct dev_pm_qos { struct dev_pm_qos_request *resume_latency_req; struct dev_pm_qos_request *latency_tolerance_req; struct dev_pm_qos_request *flags_req; + struct blocking_notifier_head notifiers; /* common for all constraints */ }; /* Action requested to pm_qos_update_target */ @@ -114,6 +115,12 @@ static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req) return req->dev != NULL; } +static inline bool dev_pm_qos_notifier_is_resume_latency(struct device *dev, + struct pm_qos_constraints *c) +{ + return &dev->power.qos->resume_latency == c; +} + int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node, enum pm_qos_req_action action, int value); bool pm_qos_update_flags(struct pm_qos_flags *pqf, diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 97b0df71303e..073324e0c3c8 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -315,7 +315,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node, if (c->notifiers) blocking_notifier_call_chain(c->notifiers, (unsigned long)curr_value, - NULL); + c); } else { ret = 0; }