From patchwork Wed Apr 26 10:57:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 9701095 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0F971603F4 for ; Wed, 26 Apr 2017 10:58:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 07C1028178 for ; Wed, 26 Apr 2017 10:58:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F08CB28468; Wed, 26 Apr 2017 10:58:05 +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=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4B7A528178 for ; Wed, 26 Apr 2017 10:58:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1038058AbdDZK6C (ORCPT ); Wed, 26 Apr 2017 06:58:02 -0400 Received: from mail-pf0-f170.google.com ([209.85.192.170]:35545 "EHLO mail-pf0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998893AbdDZK5f (ORCPT ); Wed, 26 Apr 2017 06:57:35 -0400 Received: by mail-pf0-f170.google.com with SMTP id v14so36980239pfd.2 for ; Wed, 26 Apr 2017 03:57:35 -0700 (PDT) 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=jgFxHr+7s4Tdird13zMdMi4GqFXmetymbC5sOfC1mig=; b=e63JKAs/Z3a/q5yZBh3si+yjyzmSkHLGfIBHFPkvZLCMvVEd5tomJkWPPplVT8ZRUW sS90uMrv4P8FjqdyWKwwgn1u6nmzJicNfHMzUuL21n7HBjAAh8xciWECvcKxsrxX9lDr a5be+gmCubGhJC16TLVvcAOPJ04pVC+Bdwxfg= 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=jgFxHr+7s4Tdird13zMdMi4GqFXmetymbC5sOfC1mig=; b=kU5ihhCJZ09kpvE3uCXLl9B9UEclOtwTkq7gJyNpOHyWXnTkowLa1MY1FeNlVFE5MT fPoeiCgMuqQ/ZejA6AefG8gf9CdVpO+3zP00dkMmURbU0qwEjljwwXyKPrzISmZuLmQg 6COukcWdH+9duvoT9n/b+krCWS/PQ5A1ZNsN/inavHQPF3JplUvwCQ3VMKJVdng1afEA iKSBVEWYqKE9fWfzDKdjFqf4k9m67IxKKQc3dNItWE7tiadcwVgg31DSXR6YJeuTfsmL srUFzJboGaq9FvXw2QX/om6ZDUY2jmcb/o8+NjSrUkuXu2JPqrr2AkNTFZQhQiLICvsI 73tA== X-Gm-Message-State: AN3rC/5QoLuFRat5Ov2Idq8aZB1GMtlg81PEstZt3RaOmCPeo/BYeUVD AQNB5aHBx3loryO2 X-Received: by 10.98.198.210 with SMTP id x79mr32102558pfk.224.1493204253926; Wed, 26 Apr 2017 03:57:33 -0700 (PDT) Received: from localhost ([122.172.121.5]) by smtp.gmail.com with ESMTPSA id 3sm21812524pfe.20.2017.04.26.03.57.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Apr 2017 03:57:33 -0700 (PDT) From: Viresh Kumar To: Rafael Wysocki , ulf.hansson@linaro.org, Kevin Hilman , Pavel Machek , Len Brown Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Vincent Guittot , Stephen Boyd , Nishanth Menon , robh+dt@kernel.org, lina.iyer@linaro.org, rnayak@codeaurora.org, sudeep.holla@arm.com, Viresh Kumar Subject: [PATCH V6 3/9] PM / QOS: Keep common notifier list for genpd constraints Date: Wed, 26 Apr 2017 16:27:07 +0530 Message-Id: X-Mailer: git-send-email 2.12.0.432.g71c3a4f4ba37 In-Reply-To: References: In-Reply-To: References: Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-by: Ulf Hansson --- 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(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index da49a8383dc3..f6f616ac5cc2 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -426,14 +426,10 @@ 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 genpd_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; @@ -466,6 +462,22 @@ 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_is_resume_latency(dev, ptr)) + return genpd_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 f850daeffba4..654d8a12c2e7 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -172,18 +172,12 @@ 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); @@ -191,7 +185,7 @@ 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); @@ -268,7 +262,6 @@ 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: @@ -487,7 +480,7 @@ 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); @@ -514,7 +507,7 @@ 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 032b55909145..e546d1a2f237 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_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; }