void* eng_uevt_thread(void *x)
{
struct pollfd ufd;
int sock = -1;
int nr;
sock = uevent_open_socket(256*1024, true);
if(-1 == sock){
ENG_LOG("%s: socket init failed !\n", __FUNCTION__);
return 0;
}
if(eng_usb_state()) {
g_armlog_enable = 1;
sem_post(&g_armlog_sem);
}
ufd.events = POLLIN;
ufd.fd = sock;
while(1) {
ufd.revents = 0;
nr = poll(&ufd, 1, -1);
if (nr <= 0)
continue;
if (ufd.revents == POLLIN)
handle_device_fd(sock);
}
return 0;
}
static int uevent_init() {
uevent_fd = uevent_open_socket(UEVENT_BUF_SIZE, true);
if (uevent_fd >= 0) {
fcntl(uevent_fd, F_SETFL, O_NONBLOCK);
} else {
KLOG_ERROR(LOG_TAG, "%s: uevent_open_socket failed; errno=%s\n",
__func__, strerror(errno));
return errno;
}
return 0;
}
void *do_hotplug(void *data)
{
int err = 0;
int cpu = (int) data;
struct pollfd fds;
char buf[1024] = {0};
char cpu_online[MAX_BUF * 2] = {0};
char cpu_offline[MAX_BUF * 2] = {0};
unsigned int online;
int recv_bytes = 0;
/* Looking for online@/devices/system/cpu/cpu1 or
* offline@/devices/system/cpu/cpu1 */
snprintf(cpu_online, MAX_BUF * 2, "online@/devices/system/cpu/cpu1" );
snprintf(cpu_offline, MAX_BUF * 2, "offline@/devices/system/cpu/cpu1");
fds.events = POLLIN;
fds.fd = uevent_open_socket(64*1024, true);
if (fds.fd == -1) {
msg("Error opening socket for hotplug uevent.\n");
return NULL;
}
while (1) {
err = poll(&fds, 1, -1);
if (err == -1) {
msg("Error in hotplug CPU[%d] poll.\n", cpu);
break;
}
recv_bytes = uevent_kernel_multicast_recv(fds.fd, buf, sizeof(buf));
if (recv_bytes == -1)
continue;
if (recv_bytes >= 1024)
buf[1023] = '\0';
else
buf[recv_bytes] = '\0';
if (!strcmp(buf, cpu_online))
online = 1;
else if (!strcmp(buf, cpu_offline))
online = 0;
else
continue;
pthread_mutex_lock(&hotplug_mutex);
if (stall_decision_external && !thermal_condition) {
pthread_mutex_unlock(&hotplug_mutex);
continue;
}
dbgmsg("Online %u core1_status %d stalled %d\n",
online, core1_status, stall_decision);
if (thermal_condition && online == 1) {
/* hotplug core back off, since we are in thermal state */
msg("System in thermal condition, bring core back down.");
core1_status = CORE_DOWN;
cpu_up(1, CORE_DOWN);
} else if (!stall_decision && online != core1_status && boost_time == 0) {
msg("CPU[%d] has been hotplugged outside MP-Decision.", cpu);
msg("MP-Decision will be stalled until enabled.");
core1_status = online ? CORE_UP : CORE_DOWN;
stall_decision = 1;
} else if (stall_decision) {
msg("Enabling MP decision for CPU[%d]\n", cpu);
stall_decision = 0;
core1_status = online ? CORE_UP : CORE_DOWN;
pthread_cond_broadcast(&hotplug_condition);
}
pthread_mutex_unlock(&hotplug_mutex);
}
return NULL;
}