/*
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define LOG_NDEBUG 1
#include <dlfcn.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "utils.h"
#include "list.h"
#include "hint-data.h"
#include "power-common.h"
#define LOG_TAG "QCOM PowerHAL"
#include <utils/Log.h>
#ifndef INTERACTION_BOOST
#define INTERACTION_BOOST
#endif
char scaling_gov_path[4][80] ={
"sys/devices/system/cpu/cpu0/cpufreq/scaling_governor",
"sys/devices/system/cpu/cpu1/cpufreq/scaling_governor",
"sys/devices/system/cpu/cpu2/cpufreq/scaling_governor",
"sys/devices/system/cpu/cpu3/cpufreq/scaling_governor"
};
static void *qcopt_handle;
static int (*perf_lock_acq)(unsigned long handle, int duration,
int list[], int numArgs);
static int (*perf_lock_rel)(unsigned long handle);
static struct list_node active_hint_list_head;
static void *get_qcopt_handle()
{
char qcopt_lib_path[PATH_MAX] = {0};
void *handle = NULL;
dlerror();
if (property_get("ro.vendor.extension_library", qcopt_lib_path,
NULL)) {
handle = dlopen(qcopt_lib_path, RTLD_NOW);
if (!handle) {
ALOGE("Unable to open %s: %s\n", qcopt_lib_path,
dlerror());
}
}
return handle;
}
static void __attribute__ ((constructor)) initialize(void)
{
qcopt_handle = get_qcopt_handle();
if (!qcopt_handle) {
ALOGE("Failed to get qcopt handle.\n");
} else {
/*
* qc-opt handle obtained. Get the perflock acquire/release
* function pointers.
*/
perf_lock_acq = dlsym(qcopt_handle, "perf_lock_acq");
if (!perf_lock_acq) {
ALOGE("Unable to get perf_lock_acq function handle.\n");
}
perf_lock_rel = dlsym(qcopt_handle, "perf_lock_rel");
if (!perf_lock_rel) {
ALOGE("Unable to get perf_lock_rel function handle.\n");
}
}
}
static void __attribute__ ((destructor)) cleanup(void)
{
if (qcopt_handle) {
if (dlclose(qcopt_handle))
ALOGE("Error occurred while closing qc-opt library.");
}
}
int sysfs_read(char *path, char *s, int num_bytes)
{
char buf[80];
int count;
int ret = 0;
int fd = open(path, O_RDONLY);
if (fd < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", path, buf);
return -1;
}
if ((count = read(fd, s, num_bytes - 1)) < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", path, buf);
ret = -1;
} else {
s[count] = '\0';
}
close(fd);
return ret;
}
int sysfs_write(char *path, char *s)
{
char buf[80];
int len;
int ret = 0;
int fd = open(path, O_WRONLY);
if (fd < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", path, buf);
return -1 ;
}
len = write(fd, s, strlen(s));
if (len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", path, buf);
ret = -1;
}
close(fd);
return ret;
}
int get_scaling_governor(char governor[], int size)
{
if (sysfs_read(SCALING_GOVERNOR_PATH, governor,
size) == -1) {
// Can't obtain the scaling governor. Return.
return -1;
} else {
// Strip newline at the end.
int len = strlen(governor);
len--;
while (len >= 0 && (governor[len] == '\n' || governor[len] == '\r'))
governor[len--] = '\0';
}
return 0;
}
int get_scaling_governor_check_cores(char governor[], int size,int core_num)
{
if (sysfs_read(scaling_gov_path[core_num], governor,
size) == -1) {
// Can't obtain the scaling governor. Return.
return -1;
}
// Strip newline at the end.
int len = strlen(governor);
len--;
while (len >= 0 && (governor[len] == '\n' || governor[len] == '\r'))
governor[len--] = '\0';
return 0;
}
void interaction(int duration, int num_args, int opt_list[])
{
#ifdef INTERACTION_BOOST
static int lock_handle = 0;
if (duration < 0 || num_args < 1 || opt_list[0] == 0)
return;
if (qcopt_handle) {
if (perf_lock_acq) {
lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
if (lock_handle == -1)
ALOGE("Failed to acquire lock.");
}
}
#endif
}
int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[])
{
#ifdef INTERACTION_BOOST
if (duration < 0 || num_args < 1 || opt_list[0] == 0)
return 0;
if (qcopt_handle) {
if (perf_lock_acq) {
lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
if (lock_handle == -1)
ALOGE("Failed to acquire lock.");
}
}
return lock_handle;
#endif
return 0;
}
void release_request(int lock_handle) {
if (qcopt_handle && perf_lock_rel)
perf_lock_rel(lock_handle);
}
void perform_hint_action(int hint_id, int resource_values[], int num_resources)
{
if (qcopt_handle) {
struct hint_data temp_hint_data = {
.hint_id = hint_id
};
struct list_node *found_node = find_node(&active_hint_list_head,
&temp_hint_data);
if (found_node) {
ALOGE("hint ID %d already active", hint_id);
return;
}
if (perf_lock_acq) {
/* Acquire an indefinite lock for the requested resources. */
int lock_handle = perf_lock_acq(0, 0, resource_values,
num_resources);
if (lock_handle == -1) {
ALOGE("Failed to acquire lock.");
} else {
/* Add this handle to our internal hint-list. */
struct hint_data *new_hint =
(struct hint_data *)malloc(sizeof(struct hint_data));
if (new_hint) {
if (!active_hint_list_head.compare) {
active_hint_list_head.compare =
(int (*)(void *, void *))hint_compare;
active_hint_list_head.dump = (void (*)(void *))hint_dump;
}
new_hint->hint_id = hint_id;
new_hint->perflock_handle = lock_handle;
if (add_list_node(&active_hint_list_head, new_hint) == NULL) {
free(new_hint);
/* Can't keep track of this lock. Release it. */
if (perf_lock_rel)
perf_lock_rel(lock_handle);
ALOGE("Failed to process hint.");
}
} else {
/* Can't keep track of this lock. Release it. */
if (perf_lock_rel)
perf_lock_rel(lock_handle);
ALOGE("Failed to process hint.");
}
}
}
}
}
void undo_hint_action(int hint_id)
{
if (qcopt_handle) {
if (perf_lock_rel) {
/* Get hint-data associated with this hint-id */
struct list_node *found_node;
struct hint_data temp_hint_data = {
.hint_id = hint_id
};
found_node = find_node(&active_hint_list_head,
&temp_hint_data);
if (found_node) {
/* Release this lock. */
struct hint_data *found_hint_data =
(struct hint_data *)(found_node->data);
if (found_hint_data) {
if (perf_lock_rel(found_hint_data->perflock_handle) == -1)
ALOGE("Perflock release failed: %d", hint_id);
}
if (found_node->data) {
/* We can free the hint-data for this node. */
free(found_node->data);
}
remove_list_node(&active_hint_list_head, found_node);
ALOGV("Undo of hint ID %d succeeded", hint_id);
} else {
ALOGE("Invalid hint ID: %d", hint_id);
}
}
}
}
/*
* Used to release initial lock holding
* two cores online when the display is on
*/
void undo_initial_hint_action()
{
if (qcopt_handle) {
if (perf_lock_rel) {
perf_lock_rel(1);
}
}
}