mirror of
https://github.com/physwizz/a155-U-u1.git
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129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/*
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* Copyright (C) 2012-2019 Samsung Electronics, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/atomic.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/pm_qos.h>
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#include "tzdev_internal.h"
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#include "core/cdev.h"
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#include "core/log.h"
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#include "core/notifier.h"
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#include "core/subsystem.h"
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#include "extensions/hotplug.h"
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#if CONFIG_TZDEV_BOOST_CLUSTER == 1
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/* cluster 1 is a high performance cluster */
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#ifndef PM_QOS_CLUSTER1_FREQ_MAX_DEFAULT_VALUE
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#define TZ_BOOST_CPU_FREQ_MAX_DEFAULT_VALUE INT_MAX
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#else
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#define TZ_BOOST_CPU_FREQ_MAX_DEFAULT_VALUE PM_QOS_CLUSTER1_FREQ_MAX_DEFAULT_VALUE
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#endif
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#define TZ_BOOST_CPU_FREQ_MIN PM_QOS_CLUSTER1_FREQ_MIN
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#elif CONFIG_TZDEV_BOOST_CLUSTER == 2
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/* cluster 2 is a high performance cluster */
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#ifndef PM_QOS_CLUSTER2_FREQ_MAX_DEFAULT_VALUE
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#define TZ_BOOST_CPU_FREQ_MAX_DEFAULT_VALUE INT_MAX
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#else
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#define TZ_BOOST_CPU_FREQ_MAX_DEFAULT_VALUE PM_QOS_CLUSTER2_FREQ_MAX_DEFAULT_VALUE
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#endif
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#define TZ_BOOST_CPU_FREQ_MIN PM_QOS_CLUSTER2_FREQ_MIN
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#endif /* TZDEV_BOOST_CLUSTER */
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static int tz_boost_users = 0;
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static struct pm_qos_request tz_boost_qos;
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static unsigned int cpu_boost_mask;
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static DEFINE_MUTEX(tz_boost_lock);
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static int tz_boost_init_call(struct notifier_block *cb, unsigned long code, void *unused)
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{
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struct tzio_swd_sysconf *swd_sysconf;
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int i;
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(void)cb;
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(void)code;
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(void)unused;
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swd_sysconf = &tzdev_sysconf()->swd_sysconf;
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for (i = 0; i < CPU_CLUSTER_MAX; ++i) {
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if (swd_sysconf->cluster_info[i].type == CPU_CLUSTER_BIG) {
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cpu_boost_mask = swd_sysconf->cluster_info[i].mask;
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log_info(tzdev_boost, "Booster initialization done.\n");
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return NOTIFY_DONE;
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}
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}
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log_error(tzdev_boost, "Failed to get CPU boost mask\n");
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return NOTIFY_BAD;
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}
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static struct notifier_block tz_boost_init_notifier = {
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.notifier_call = tz_boost_init_call,
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};
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int tz_boost_init(void)
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{
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int rc;
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rc = tzdev_blocking_notifier_register(TZDEV_INIT_NOTIFIER, &tz_boost_init_notifier);
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if (rc) {
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log_error(tzdev_boost, "Failed to register init notifier, error=%d\n", rc);
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return rc;
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}
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log_info(tzdev_boost, "Boost callbacks registration done\n");
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return 0;
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}
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tzdev_early_initcall(tz_boost_init);
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void tz_boost_enable(void)
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{
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mutex_lock(&tz_boost_lock);
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if (!tz_boost_users) {
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tz_hotplug_update_nwd_cpu_mask(cpu_boost_mask);
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pm_qos_add_request(&tz_boost_qos, TZ_BOOST_CPU_FREQ_MIN,
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TZ_BOOST_CPU_FREQ_MAX_DEFAULT_VALUE);
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}
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tz_boost_users++;
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mutex_unlock(&tz_boost_lock);
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}
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void tz_boost_disable(void)
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{
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mutex_lock(&tz_boost_lock);
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tz_boost_users--;
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BUG_ON(tz_boost_users < 0);
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if (!tz_boost_users) {
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pm_qos_remove_request(&tz_boost_qos);
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tz_hotplug_update_nwd_cpu_mask(0x0);
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}
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mutex_unlock(&tz_boost_lock);
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}
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