From patchwork Fri Mar 24 07:08:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13186488 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 A39F0C6FD20 for ; Fri, 24 Mar 2023 07:08:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230476AbjCXHIS (ORCPT ); Fri, 24 Mar 2023 03:08:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230079AbjCXHIR (ORCPT ); Fri, 24 Mar 2023 03:08:17 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A684270B; Fri, 24 Mar 2023 00:08:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679641696; x=1711177696; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=1QwNjA/703mfJcIj5DSMOgyWQ/j+uRh45wv8E+wMysE=; b=WTsqof7QB+w8HsQPQScXcuo8Fw4ijRo5+OJt7cRp/JmkxlF++//1FRAg dLdYVwBn8jVOCr6le+X0/Bdh2MjkgYyqZSxYhzl4SX7S1AvNcjK9+Q47p vYFuxCR7il+hxsl8mKRHMyz5iAGn9sK3Du0S8ktcCa7a6qPrC8qM8VnPV b5L0Tm3u8sCjrmqAp3SFZ2vr8agLUpT6+w2A/se/U4wT0XlLcuz8yROsU QYZ2Mqw5mgH6b8PkVNX4QczPVjqn7a/U6uYOVPJ9+128OiLzuqUs/GiuQ pmRtLSGVs5h2IpnVOFEJUBj3omup+OitRjZh8dZu19KfIHbQ9IcJPkpRc w==; X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="402296711" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="402296711" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="747046047" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="747046047" Received: from fli4-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.255.28.30]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:14 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH v2 1/5] thermal/core: Update cooling device during thermal zone unregistration Date: Fri, 24 Mar 2023 15:08:03 +0800 Message-Id: <20230324070807.6342-1-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org When unregistering a thermal zone device, update all cooling devices bound to the thermal zone device. This fixes a problem that the frequency of ACPI processors are still limited after unloading ACPI thermal driver while ACPI passive cooling is activated. Cc: stable@vger.kernel.org Signed-off-by: Zhang Rui --- v1 -> v2 Changelog update. Rearrange the code to elimiate an "iterator used outside loop" warning. --- drivers/thermal/thermal_core.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index cfd4c1afeae7..30ff39154598 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1497,9 +1497,24 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) /* Unbind all cdevs associated with 'this' thermal zone */ list_for_each_entry(cdev, &thermal_cdev_list, node) { + struct thermal_instance *ti; + + mutex_lock(&tz->lock); + list_for_each_entry(ti, &tz->thermal_instances, tz_node) { + if (ti->cdev == cdev) { + mutex_unlock(&tz->lock); + goto unbind; + } + } + + /* The cooling device is not bound to current thermal zone */ + mutex_unlock(&tz->lock); + continue; + +unbind: if (tz->ops->unbind) { tz->ops->unbind(tz, cdev); - continue; + goto deactivate; } if (!tzp || !tzp->tbp) @@ -1511,6 +1526,16 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) tzp->tbp[i].cdev = NULL; } } + +deactivate: + /* + * The thermal instances for current thermal zone has been + * removed. Update the cooling device in case it is activated + * by current thermal zone device. + */ + mutex_lock(&cdev->lock); + __thermal_cdev_update(cdev); + mutex_unlock(&cdev->lock); } mutex_unlock(&thermal_list_lock); From patchwork Fri Mar 24 07:08:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13186489 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 2D05EC76195 for ; Fri, 24 Mar 2023 07:08:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229484AbjCXHIT (ORCPT ); Fri, 24 Mar 2023 03:08:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230491AbjCXHIS (ORCPT ); Fri, 24 Mar 2023 03:08:18 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B969E2723; Fri, 24 Mar 2023 00:08:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679641697; x=1711177697; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DNQRMQLHwGWEKQ5jQmcWcG0jrDlQUzQ9voomVMZTSz8=; b=F4jTTHnMhJRVdfDYr1sqW1xw7ofz+7oJ+Q28R37QQei5ja0chpI+LGC8 0bcoMm92u7djLPv75f1T+ygOOmUhbgDbXNVmmeBqOIo75ZVweCpytAGOF RosBzFrpNgM71FXopBLtbpaWLeAt8yiZLT2vAN7C+cMJIKnA14syONI6R Oy6Lfki9QG+qdHxTME1dz7/30m4Q34TrBZFyNLW4RNXdPY1eiuZGn0UjA GgGlHtQ6m5mH+Dx34hWvE2w263maJnKKc39gO8Pl5i++Kr1ovifcYPhZF 9VX7UEmrefGpSo9Fv/K+Zx/BHIlOsyQRUzd8t7KEyF97jI+ZU96LLW2Vu A==; X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="402296717" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="402296717" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="747046053" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="747046053" Received: from fli4-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.255.28.30]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:16 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 2/5] thermal/core: Reset cooling state during cooling device unregistration Date: Fri, 24 Mar 2023 15:08:04 +0800 Message-Id: <20230324070807.6342-2-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230324070807.6342-1-rui.zhang@intel.com> References: <20230324070807.6342-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org When unregistering a cooling device, it is possible that the cooling device has been activated. And once the cooling device is unregistered, no one will deactivate it anymore. Reset cooling state during cooling device unregistration. Signed-off-by: Zhang Rui --- In theory, this problem that this patch fixes can be triggered on a platform with ACPI Active cooling, by 1. overheat the system to trigger ACPI active cooling 2. unload ACPI fan driver 3. check if the fan is still spinning But I don't have such a system so I didn't trigger then problem and I only did build & boot test. --- drivers/thermal/thermal_core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 30ff39154598..fd54e6c10b60 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1192,6 +1192,10 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) } } + mutex_lock(&cdev->lock); + cdev->ops->set_cur_state(cdev, 0); + mutex_unlock(&cdev->lock); + mutex_unlock(&thermal_list_lock); device_unregister(&cdev->device); From patchwork Fri Mar 24 07:08:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13186490 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 781D3C6FD20 for ; Fri, 24 Mar 2023 07:08:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231301AbjCXHIZ (ORCPT ); Fri, 24 Mar 2023 03:08:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231189AbjCXHIU (ORCPT ); Fri, 24 Mar 2023 03:08:20 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E2F02723; Fri, 24 Mar 2023 00:08:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679641699; x=1711177699; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=u6iHiScBifXZ1ltDhXObrT9QpiwYLsnp8xcW9/S7U+I=; b=Co4IB9WLWmF/EB+Bp0QncespEoLf8/WEda4Jt5hc524q15UEYpheQNJJ MyENTgnCZyMdwKKQQfOmBnqQJNlOAPz+7KNv5uVOYKLyQSYDF/XOmu15l /nsu76JUJpDWKxc+cecGyI9aSiQCT+XeY3DrpHeX943MH2oIyBKAZrRoV wRWwYYXFh0oxQXvIJ1G7605Ig+/lR+MoBu0Uyx8mUsdGhjJwN+fEglY/V ffBNcd9H8sTaLI7aEjpZIClf3UUEJVFmRi2X7t0Qy3Kjk8ObXTEvpKUM9 Wxnf6Fxzp1gizLbfGjNofftVpNsKtvobUIsBzbLVNxaO2jNZtFZemJxZH w==; X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="402296723" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="402296723" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="747046056" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="747046056" Received: from fli4-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.255.28.30]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:17 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 3/5] thermal/core: Remove thermal_bind_params structure Date: Fri, 24 Mar 2023 15:08:05 +0800 Message-Id: <20230324070807.6342-3-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230324070807.6342-1-rui.zhang@intel.com> References: <20230324070807.6342-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Remove struct thermal_bind_params because no one is using it for thermal binding now. Signed-off-by: Zhang Rui --- .../driver-api/thermal/sysfs-api.rst | 40 ------ drivers/thermal/thermal_core.c | 134 ++---------------- include/linux/thermal.h | 38 ----- 3 files changed, 14 insertions(+), 198 deletions(-) diff --git a/Documentation/driver-api/thermal/sysfs-api.rst b/Documentation/driver-api/thermal/sysfs-api.rst index 2e0f79a9e2ee..6c1175c6afba 100644 --- a/Documentation/driver-api/thermal/sysfs-api.rst +++ b/Documentation/driver-api/thermal/sysfs-api.rst @@ -304,42 +304,6 @@ temperature) and throttle appropriate devices. 1.4 Thermal Zone Parameters --------------------------- - :: - - struct thermal_bind_params - - This structure defines the following parameters that are used to bind - a zone with a cooling device for a particular trip point. - - .cdev: - The cooling device pointer - .weight: - The 'influence' of a particular cooling device on this - zone. This is relative to the rest of the cooling - devices. For example, if all cooling devices have a - weight of 1, then they all contribute the same. You can - use percentages if you want, but it's not mandatory. A - weight of 0 means that this cooling device doesn't - contribute to the cooling of this zone unless all cooling - devices have a weight of 0. If all weights are 0, then - they all contribute the same. - .trip_mask: - This is a bit mask that gives the binding relation between - this thermal zone and cdev, for a particular trip point. - If nth bit is set, then the cdev and thermal zone are bound - for trip point n. - .binding_limits: - This is an array of cooling state limits. Must have - exactly 2 * thermal_zone.number_of_trip_points. It is an - array consisting of tuples of - state limits. Each trip will be associated with one state - limit tuple when binding. A NULL pointer means - on all trips. - These limits are used when binding a cdev to a trip point. - .match: - This call back returns success(0) if the 'tz and cdev' need to - be bound, as per platform data. - :: struct thermal_zone_params @@ -357,10 +321,6 @@ temperature) and throttle appropriate devices. will be created. when no_hwmon == true, nothing will be done. In case the thermal_zone_params is NULL, the hwmon interface will be created (for backward compatibility). - .num_tbps: - Number of thermal_bind_params entries for this zone - .tbp: - thermal_bind_params entries 2. sysfs attributes structure ============================= diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index fd54e6c10b60..5225d65fb0e0 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -794,65 +794,20 @@ void print_bind_err_msg(struct thermal_zone_device *tz, tz->type, cdev->type, ret); } -static void __bind(struct thermal_zone_device *tz, int mask, - struct thermal_cooling_device *cdev, - unsigned long *limits, - unsigned int weight) -{ - int i, ret; - - for (i = 0; i < tz->num_trips; i++) { - if (mask & (1 << i)) { - unsigned long upper, lower; - - upper = THERMAL_NO_LIMIT; - lower = THERMAL_NO_LIMIT; - if (limits) { - lower = limits[i * 2]; - upper = limits[i * 2 + 1]; - } - ret = thermal_zone_bind_cooling_device(tz, i, cdev, - upper, lower, - weight); - if (ret) - print_bind_err_msg(tz, cdev, ret); - } - } -} - static void bind_cdev(struct thermal_cooling_device *cdev) { - int i, ret; - const struct thermal_zone_params *tzp; + int ret; struct thermal_zone_device *pos = NULL; mutex_lock(&thermal_list_lock); list_for_each_entry(pos, &thermal_tz_list, node) { - if (!pos->tzp && !pos->ops->bind) + if (!pos->ops->bind) continue; - if (pos->ops->bind) { - ret = pos->ops->bind(pos, cdev); - if (ret) - print_bind_err_msg(pos, cdev, ret); - continue; - } - - tzp = pos->tzp; - if (!tzp || !tzp->tbp) - continue; - - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev || !tzp->tbp[i].match) - continue; - if (tzp->tbp[i].match(pos, cdev)) - continue; - tzp->tbp[i].cdev = cdev; - __bind(pos, tzp->tbp[i].trip_mask, cdev, - tzp->tbp[i].binding_limits, - tzp->tbp[i].weight); - } + ret = pos->ops->bind(pos, cdev); + if (ret) + print_bind_err_msg(pos, cdev, ret); } mutex_unlock(&thermal_list_lock); @@ -1138,16 +1093,6 @@ void thermal_cooling_device_update(struct thermal_cooling_device *cdev) } EXPORT_SYMBOL_GPL(thermal_cooling_device_update); -static void __unbind(struct thermal_zone_device *tz, int mask, - struct thermal_cooling_device *cdev) -{ - int i; - - for (i = 0; i < tz->num_trips; i++) - if (mask & (1 << i)) - thermal_zone_unbind_cooling_device(tz, i, cdev); -} - /** * thermal_cooling_device_unregister - removes a thermal cooling device * @cdev: the thermal cooling device to remove. @@ -1157,8 +1102,6 @@ static void __unbind(struct thermal_zone_device *tz, int mask, */ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) { - int i; - const struct thermal_zone_params *tzp; struct thermal_zone_device *tz; if (!cdev) @@ -1175,21 +1118,8 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) /* Unbind all thermal zones associated with 'this' cdev */ list_for_each_entry(tz, &thermal_tz_list, node) { - if (tz->ops->unbind) { + if (tz->ops->unbind) tz->ops->unbind(tz, cdev); - continue; - } - - if (!tz->tzp || !tz->tzp->tbp) - continue; - - tzp = tz->tzp; - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev == cdev) { - __unbind(tz, tzp->tbp[i].trip_mask, cdev); - tzp->tbp[i].cdev = NULL; - } - } } mutex_lock(&cdev->lock); @@ -1204,41 +1134,20 @@ EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); static void bind_tz(struct thermal_zone_device *tz) { - int i, ret; + int ret; struct thermal_cooling_device *pos = NULL; - const struct thermal_zone_params *tzp = tz->tzp; - if (!tzp && !tz->ops->bind) + if (!tz->ops->bind) return; mutex_lock(&thermal_list_lock); - /* If there is ops->bind, try to use ops->bind */ - if (tz->ops->bind) { - list_for_each_entry(pos, &thermal_cdev_list, node) { - ret = tz->ops->bind(tz, pos); - if (ret) - print_bind_err_msg(tz, pos, ret); - } - goto exit; - } - - if (!tzp || !tzp->tbp) - goto exit; - list_for_each_entry(pos, &thermal_cdev_list, node) { - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev || !tzp->tbp[i].match) - continue; - if (tzp->tbp[i].match(tz, pos)) - continue; - tzp->tbp[i].cdev = pos; - __bind(tz, tzp->tbp[i].trip_mask, pos, - tzp->tbp[i].binding_limits, - tzp->tbp[i].weight); - } + ret = tz->ops->bind(tz, pos); + if (ret) + print_bind_err_msg(tz, pos, ret); } -exit: + mutex_unlock(&thermal_list_lock); } @@ -1477,15 +1386,13 @@ EXPORT_SYMBOL_GPL(thermal_zone_device_register); */ void thermal_zone_device_unregister(struct thermal_zone_device *tz) { - int i, tz_id; - const struct thermal_zone_params *tzp; + int tz_id; struct thermal_cooling_device *cdev; struct thermal_zone_device *pos = NULL; if (!tz) return; - tzp = tz->tzp; tz_id = tz->id; mutex_lock(&thermal_list_lock); @@ -1516,22 +1423,9 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) continue; unbind: - if (tz->ops->unbind) { + if (tz->ops->unbind) tz->ops->unbind(tz, cdev); - goto deactivate; - } - - if (!tzp || !tzp->tbp) - break; - - for (i = 0; i < tzp->num_tbps; i++) { - if (tzp->tbp[i].cdev == cdev) { - __unbind(tz, tzp->tbp[i].trip_mask, cdev); - tzp->tbp[i].cdev = NULL; - } - } -deactivate: /* * The thermal instances for current thermal zone has been * removed. Update the cooling device in case it is activated diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 13c6aaed18df..481417d3b9b7 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -207,41 +207,6 @@ struct thermal_governor { struct list_head governor_list; }; -/* Structure that holds binding parameters for a zone */ -struct thermal_bind_params { - struct thermal_cooling_device *cdev; - - /* - * This is a measure of 'how effectively these devices can - * cool 'this' thermal zone. It shall be determined by - * platform characterization. This value is relative to the - * rest of the weights so a cooling device whose weight is - * double that of another cooling device is twice as - * effective. See Documentation/driver-api/thermal/sysfs-api.rst for more - * information. - */ - int weight; - - /* - * This is a bit mask that gives the binding relation between this - * thermal zone and cdev, for a particular trip point. - * See Documentation/driver-api/thermal/sysfs-api.rst for more information. - */ - int trip_mask; - - /* - * This is an array of cooling state limits. Must have exactly - * 2 * thermal_zone.number_of_trip_points. It is an array consisting - * of tuples of state limits. Each trip - * will be associated with one state limit tuple when binding. - * A NULL pointer means - * on all trips. - */ - unsigned long *binding_limits; - int (*match) (struct thermal_zone_device *tz, - struct thermal_cooling_device *cdev); -}; - /* Structure to define Thermal Zone parameters */ struct thermal_zone_params { char governor_name[THERMAL_NAME_LENGTH]; @@ -253,9 +218,6 @@ struct thermal_zone_params { */ bool no_hwmon; - int num_tbps; /* Number of tbp entries */ - struct thermal_bind_params *tbp; - /* * Sustainable power (heat) that this thermal zone can dissipate in * mW From patchwork Fri Mar 24 07:08:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13186491 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 A9546C76195 for ; Fri, 24 Mar 2023 07:08:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229522AbjCXHI0 (ORCPT ); Fri, 24 Mar 2023 03:08:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50666 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231196AbjCXHIV (ORCPT ); Fri, 24 Mar 2023 03:08:21 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E33FD10ABA; Fri, 24 Mar 2023 00:08:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679641700; x=1711177700; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wFx21pLLRhlzjgfRpaT39oVLARW7iuGOv5zrbZTnlkk=; b=abu2PdgA1eA702P8ApPn2n/+vMIRXDH5u+K5esz1fQAaD/SyvTv8hW03 gj+1vkJnB/IsZnKc88jr6Kk4ZkdKsR7DbyHQdZElF+quhahn3NQ6VMwD6 CPhsx/EE+494mQUekW6gvKTM+yzmCugKCxoASD1tGBpw3un9/IZcnx+YG pWhXbGBx3dZFwCNJbqRkcC0s7s2Rm7oGWLc/+Gkp1DaacJCMWSKe0q6CH IASfyqFyXoVdbiZS14CFHN7N9tBE3n1QWTwA3bOZPAXBRfdFXPrt2Km03 ubDuAhtHHKcKEyfcpsukclgM+EjCfqkqs7st5OoKcR1UkFvK/dolAQcOX g==; X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="402296729" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="402296729" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="747046060" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="747046060" Received: from fli4-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.255.28.30]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:19 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 4/5] thermal/core: Enforce paired .bind/.unbind callbacks Date: Fri, 24 Mar 2023 15:08:06 +0800 Message-Id: <20230324070807.6342-4-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230324070807.6342-1-rui.zhang@intel.com> References: <20230324070807.6342-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The .bind/.unbind callbacks are designed to allow the thermal zone device to bind to/unbind from a matched cooling device, with thermal instances created/deleted. In this sense, .bind/.unbind callbacks must exist in pairs. Signed-off-by: Zhang Rui --- drivers/thermal/thermal_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 5225d65fb0e0..9c447f22cb39 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1258,6 +1258,11 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp) && !trips) return ERR_PTR(-EINVAL); + if ((ops->bind && !ops->unbind) || (!ops->bind && ops->unbind)) { + pr_err("Thermal zone device .bind/.unbind not paired\n"); + return ERR_PTR(-EINVAL); + } + if (!thermal_class) return ERR_PTR(-ENODEV); From patchwork Fri Mar 24 07:08:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 13186492 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 EC029C6FD1C for ; Fri, 24 Mar 2023 07:08:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231444AbjCXHIe (ORCPT ); Fri, 24 Mar 2023 03:08:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231241AbjCXHIY (ORCPT ); Fri, 24 Mar 2023 03:08:24 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C9B95261; Fri, 24 Mar 2023 00:08:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679641702; x=1711177702; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Is2PNwJDYKRvv3xNHfYVY2PhgMrlEfNhGTel6iyfNy8=; b=aUvsfTZqzs4/PkVoh8LJ+/8S0So/E1+Cli7KlLLMJP3dsW6toxaS+VW6 RWalAUS/V4yHCoj+Bq1IlqZ+PXT2tSC+cQ5wCQbY/suSft6+mS9fMdPYD /a4s4k/HdgrJ7QSQqtjg1f6JhCGTpv/gzu3sLhh1n3PIWrLfnWyInZBtP 0nG5tWLX+Cue+Y3Sd9aaVN1G2Cs6+ECswDbBueFwFrpQ/ep+nQIacm8IN a183X1RDkm3Pel4aoTZLZN+GtNF1eiwhDGMLWFz7DOCzqjhkjv2Bq5Quk fs724P15gRpswH6w6CEtoVARjkR+WfGZtMeDfkbHknKysWgPS5I3VFBnF w==; X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="402296736" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="402296736" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10658"; a="747046063" X-IronPort-AV: E=Sophos;i="5.98,287,1673942400"; d="scan'208";a="747046063" Received: from fli4-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.255.28.30]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2023 00:08:20 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 5/5] thermal/core: Avoid unbind for thermal zones without .unbind() Date: Fri, 24 Mar 2023 15:08:07 +0800 Message-Id: <20230324070807.6342-5-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230324070807.6342-1-rui.zhang@intel.com> References: <20230324070807.6342-1-rui.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The ops->bind()/unbind() callback is the only way to bind/unbind a cooling device to/from a thermal zone. Optimize the code to avoid trying unbind when .unbind() callback doesn't exist. Signed-off-by: Zhang Rui --- drivers/thermal/thermal_core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 9c447f22cb39..1af36450f13e 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1411,6 +1411,9 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) } list_del(&tz->node); + if (!tz->ops->unbind) + goto unbind_done; + /* Unbind all cdevs associated with 'this' thermal zone */ list_for_each_entry(cdev, &thermal_cdev_list, node) { struct thermal_instance *ti; @@ -1428,8 +1431,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) continue; unbind: - if (tz->ops->unbind) - tz->ops->unbind(tz, cdev); + tz->ops->unbind(tz, cdev); /* * The thermal instances for current thermal zone has been @@ -1441,6 +1443,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) mutex_unlock(&cdev->lock); } +unbind_done: mutex_unlock(&thermal_list_lock); cancel_delayed_work_sync(&tz->poll_queue);