kernel_samsung_a34x-permissive/drivers/tee/tzdev/4.2.0/extensions/boost.c
2024-04-28 15:51:13 +02:00

129 lines
3.1 KiB
C

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