From patchwork Tue May 14 10:18:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: thermal-bot for Julien Panis X-Patchwork-Id: 797172 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0300213FD83 for ; Tue, 14 May 2024 10:19:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715681946; cv=none; b=UJHa1567JwwuC9kwcJvZF8UvF2EZak0oF+Mj9Ui3RY0f2BYtBPVmrL6mtntvsSVrDTty6Hntq8Mq8HhZvq1izSI0pYUvg3wHjzjaaWQWkNNWN01w1liB6yoy8q/QSlM27tKbcvkKkCGEltxP89DMpEb394VHbnFdToZtEFuCSlM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715681946; c=relaxed/simple; bh=nPqCDg5Hf/67EuyUXUNro21NvQu0+xhlxN0jlsXZCZ4=; h=Date:From:To:Subject:Cc:MIME-Version:Message-ID:Content-Type; b=UNNIJRX8nvxND7zEoZCd0gTaMUH3EJU+2rm+uX8oZRWlIuBphfJXBT/HR4XWKZScC84OihQTbBLfTQJwracHZMNN0dJpCp+d2fZ1KNhFPdIahS2HuYGi2Yi+uQHGASBdGVLMpP/0J883F+Z5xv5ZJ4UfQyt8KBuScDZp8JOU/Ss= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=RccTblno; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=NqGOq+Mo; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="RccTblno"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="NqGOq+Mo" Date: Tue, 14 May 2024 10:18:57 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1715681938; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=QdwB/vPZpPWKRayFxqTE5Zzo6gQHAZQpxUblVg/mREQ=; b=RccTblnozEF3I1FK4DnwH1wy67mxpkfK13O2FIw/r68qZtA5iKOeYn3N8FPN2hO59vSI3N vHutgo55x1pbXIQ9CfsoGhsWbnQp+Rub/WWMATGxqPxs/4f1Z4VzVKQ4oJK9KBCewON94S l1Wt+BRezNNA9wNG9Isd33ubHXzNeOOeIW8vpYJTi0Zk4/jxPqCm2jN4CSYPQ0n88vRwpX N2VkoqXdztIMchBVzXLbM3XMBZkYr4QZRHpTSGAPYlu4qC+INvogoqTkfDfMZuu8nn2PnY bebZVdqaYd89m22RyTmlsx/JbatPU4vsQzUDUM2od/5ZngpT1q/6wJnosVbVcw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1715681938; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=QdwB/vPZpPWKRayFxqTE5Zzo6gQHAZQpxUblVg/mREQ=; b=NqGOq+MokwSPyLQ2U8VlanqVZZcr7/zppLKkKQ6rw9aR7Z09/0jwxESoceHnsnNYRwXJ88 FEdmBNRX8Z5VX0BA== From: "thermal-bot for Stanislaw Gruszka" Sender: tip-bot2@linutronix.de Reply-to: linux-pm@vger.kernel.org To: linux-pm@vger.kernel.org Subject: [thermal: thermal/fixes] thermal: netlink: Add genetlink bind/unbind notifications Cc: Jakub Kicinski , Stanislaw Gruszka , "Rafael J. Wysocki" , rui.zhang@intel.com, daniel.lezcano@linaro.org, amitk@kernel.org Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <171568193786.10875.3318705779489360767.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk The following commit has been merged into the thermal/fixes branch of thermal: Commit-ID: cf580ad490514cca4abbfef710fe4099738abfbd Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git//cf580ad490514cca4abbfef710fe4099738abfbd Author: Stanislaw Gruszka AuthorDate: Fri, 23 Feb 2024 16:59:40 +01:00 Committer: Rafael J. Wysocki CommitterDate: Wed, 27 Mar 2024 14:50:26 +01:00 thermal: netlink: Add genetlink bind/unbind notifications Introduce a new feature to the thermal netlink framework, enabling the registration of sub drivers to receive events via a notifier mechanism. Specifically, implement genetlink family bind and unbind callbacks to send BIND and UNBIND events. The primary purpose of this enhancement is to facilitate the tracking of user-space consumers by the Intel HFI driver. By leveraging these notifications, the driver can determine when consumers are present or absent. Suggested-by: Jakub Kicinski Signed-off-by: Stanislaw Gruszka Signed-off-by: Rafael J. Wysocki --- drivers/thermal/thermal_netlink.c | 40 ++++++++++++++++++++++++++---- drivers/thermal/thermal_netlink.h | 26 ++++++++++++++++++++- 2 files changed, 61 insertions(+), 5 deletions(-) diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c index 76a231a..d407130 100644 --- a/drivers/thermal/thermal_netlink.c +++ b/drivers/thermal/thermal_netlink.c @@ -7,17 +7,13 @@ * Generic netlink for thermal management framework */ #include +#include #include #include #include #include "thermal_core.h" -enum thermal_genl_multicast_groups { - THERMAL_GENL_SAMPLING_GROUP = 0, - THERMAL_GENL_EVENT_GROUP = 1, -}; - static const struct genl_multicast_group thermal_genl_mcgrps[] = { [THERMAL_GENL_SAMPLING_GROUP] = { .name = THERMAL_GENL_SAMPLING_GROUP_NAME, }, [THERMAL_GENL_EVENT_GROUP] = { .name = THERMAL_GENL_EVENT_GROUP_NAME, }, @@ -75,6 +71,7 @@ struct param { typedef int (*cb_t)(struct param *); static struct genl_family thermal_gnl_family; +static BLOCKING_NOTIFIER_HEAD(thermal_genl_chain); static int thermal_group_has_listeners(enum thermal_genl_multicast_groups group) { @@ -645,6 +642,27 @@ out_free_msg: return ret; } +static int thermal_genl_bind(int mcgrp) +{ + struct thermal_genl_notify n = { .mcgrp = mcgrp }; + + if (WARN_ON_ONCE(mcgrp > THERMAL_GENL_MAX_GROUP)) + return -EINVAL; + + blocking_notifier_call_chain(&thermal_genl_chain, THERMAL_NOTIFY_BIND, &n); + return 0; +} + +static void thermal_genl_unbind(int mcgrp) +{ + struct thermal_genl_notify n = { .mcgrp = mcgrp }; + + if (WARN_ON_ONCE(mcgrp > THERMAL_GENL_MAX_GROUP)) + return; + + blocking_notifier_call_chain(&thermal_genl_chain, THERMAL_NOTIFY_UNBIND, &n); +} + static const struct genl_small_ops thermal_genl_ops[] = { { .cmd = THERMAL_GENL_CMD_TZ_GET_ID, @@ -679,6 +697,8 @@ static struct genl_family thermal_gnl_family __ro_after_init = { .version = THERMAL_GENL_VERSION, .maxattr = THERMAL_GENL_ATTR_MAX, .policy = thermal_genl_policy, + .bind = thermal_genl_bind, + .unbind = thermal_genl_unbind, .small_ops = thermal_genl_ops, .n_small_ops = ARRAY_SIZE(thermal_genl_ops), .resv_start_op = THERMAL_GENL_CMD_CDEV_GET + 1, @@ -686,6 +706,16 @@ static struct genl_family thermal_gnl_family __ro_after_init = { .n_mcgrps = ARRAY_SIZE(thermal_genl_mcgrps), }; +int thermal_genl_register_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&thermal_genl_chain, nb); +} + +int thermal_genl_unregister_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&thermal_genl_chain, nb); +} + int __init thermal_netlink_init(void) { return genl_register_family(&thermal_gnl_family); diff --git a/drivers/thermal/thermal_netlink.h b/drivers/thermal/thermal_netlink.h index 93a927e..e01221e 100644 --- a/drivers/thermal/thermal_netlink.h +++ b/drivers/thermal/thermal_netlink.h @@ -10,6 +10,19 @@ struct thermal_genl_cpu_caps { int efficiency; }; +enum thermal_genl_multicast_groups { + THERMAL_GENL_SAMPLING_GROUP = 0, + THERMAL_GENL_EVENT_GROUP = 1, + THERMAL_GENL_MAX_GROUP = THERMAL_GENL_EVENT_GROUP, +}; + +#define THERMAL_NOTIFY_BIND 0 +#define THERMAL_NOTIFY_UNBIND 1 + +struct thermal_genl_notify { + int mcgrp; +}; + struct thermal_zone_device; struct thermal_trip; struct thermal_cooling_device; @@ -18,6 +31,9 @@ struct thermal_cooling_device; #ifdef CONFIG_THERMAL_NETLINK int __init thermal_netlink_init(void); void __init thermal_netlink_exit(void); +int thermal_genl_register_notifier(struct notifier_block *nb); +int thermal_genl_unregister_notifier(struct notifier_block *nb); + int thermal_notify_tz_create(const struct thermal_zone_device *tz); int thermal_notify_tz_delete(const struct thermal_zone_device *tz); int thermal_notify_tz_enable(const struct thermal_zone_device *tz); @@ -48,6 +64,16 @@ static inline int thermal_notify_tz_create(const struct thermal_zone_device *tz) return 0; } +static inline int thermal_genl_register_notifier(struct notifier_block *nb) +{ + return 0; +} + +static inline int thermal_genl_unregister_notifier(struct notifier_block *nb) +{ + return 0; +} + static inline int thermal_notify_tz_delete(const struct thermal_zone_device *tz) { return 0;