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#include <linux/ring_buffer.h>
#include "kernel/trace/trace.h"
#include <linux/mtk_ftrace.h>
#ifdef CONFIG_MTK_KERNEL_MARKER
static unsigned long __read_mostly tracing_mark_write_addr = 0;
static int kernel_marker_on = 0;
static void inline update_tracing_mark_write_addr(void)
{
if (unlikely(tracing_mark_write_addr == 0))
tracing_mark_write_addr = kallsyms_lookup_name("tracing_mark_write");
}
void inline mt_kernel_trace_begin(char *name)
{
if (unlikely(kernel_marker_on) && name)
event_trace_printk(tracing_mark_write_addr, "B|%d|%s\n", current->tgid, name);
}
EXPORT_SYMBOL(mt_kernel_trace_begin);
void inline mt_kernel_trace_counter(char *name, int count)
{
if (unlikely(kernel_marker_on) && name)
event_trace_printk(tracing_mark_write_addr,
"C|%d|%s|%d\n", current->tgid, name, count);
}
EXPORT_SYMBOL(mt_kernel_trace_counter);
void inline mt_kernel_trace_end(void)
{
if (unlikely(kernel_marker_on))
event_trace_printk(tracing_mark_write_addr, "E\n");
}
EXPORT_SYMBOL(mt_kernel_trace_end);
static ssize_t
kernel_marker_on_simple_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char buf[64];
int r;
r = sprintf(buf, "%d\n", kernel_marker_on);
return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
}
static ssize_t
kernel_marker_on_simple_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
unsigned long val;
int ret;
ret = kstrtoul_from_user(ubuf, cnt, 10, &val);
if (ret)
return ret;
kernel_marker_on = !!val;
if (kernel_marker_on)
update_tracing_mark_write_addr();
(*ppos)++;
return cnt;
}
static const struct file_operations kernel_marker_on_simple_fops = {
.open = tracing_open_generic,
.read = kernel_marker_on_simple_read,
.write = kernel_marker_on_simple_write,
.llseek = default_llseek,
};
static __init int init_kernel_marker(void)
{
struct dentry *d_tracer;
d_tracer = tracing_init_dentry();
if (!d_tracer)
return 0;
trace_create_file("kernel_marker_on", 0644, d_tracer,
NULL, &kernel_marker_on_simple_fops);
return 0;
}
fs_initcall(init_kernel_marker);
#endif
#if defined(CONFIG_MTK_HIBERNATION) && defined(CONFIG_MTK_SCHED_TRACERS)
int resize_ring_buffer_for_hibernation(int enable)
{
int ret = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
struct trace_array *tr = NULL;
#endif
if (enable) {
ring_buffer_expanded = 0;
ret = tracing_update_buffers();
} else {
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
ret = tracing_resize_ring_buffer(0, RING_BUFFER_ALL_CPUS);
#else
tr = top_trace_array();
if (tr)
ret = tracing_resize_ring_buffer(tr, 0, RING_BUFFER_ALL_CPUS);
#endif
}
return ret;
}
#endif
#ifdef CONFIG_MTK_SCHED_TRACERS
void print_enabled_events(struct seq_file *m)
{
struct ftrace_event_call *call;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
struct ftrace_event_file *file;
struct trace_array *tr;
#endif
seq_puts(m, "# enabled events:");
/* mutex_lock(&event_mutex); */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
list_for_each_entry(call, &ftrace_events, list) {
if (call->flags & TRACE_EVENT_FL_ENABLED)
seq_printf(m, " %s:%s", call->class->system, call->name);
}
#else
list_for_each_entry(tr, &ftrace_trace_arrays, list) {
list_for_each_entry(file, &tr->events, list) {
call = file->event_call;
if (file->flags & FTRACE_EVENT_FL_ENABLED)
seq_printf(m, " %s:%s", call->class->system, call->name);
}
}
#endif
/* mutex_unlock(&event_mutex); */
seq_puts(m, "\n");
}
/* ftrace's switch function for MTK solution */
void mt_ftrace_enable_disable(int enable)
{
if (enable) {
trace_set_clr_event(NULL, "sched_switch", 1);
trace_set_clr_event(NULL, "sched_wakeup", 1);
trace_set_clr_event(NULL, "sched_wakeup_new", 1);
trace_set_clr_event(NULL, "softirq_entry", 1);
trace_set_clr_event(NULL, "softirq_exit", 1);
trace_set_clr_event(NULL, "softirq_raise", 1);
#ifdef CONFIG_SMP
trace_set_clr_event(NULL, "sched_migrate_task", 1);
#endif
trace_set_clr_event(NULL, "workqueue_execute_start", 1);
trace_set_clr_event(NULL, "workqueue_execute_end", 1);
trace_set_clr_event(NULL, "block_bio_frontmerge", 1);
trace_set_clr_event(NULL, "block_bio_backmerge", 1);
trace_set_clr_event(NULL, "block_rq_issue", 1);
trace_set_clr_event(NULL, "block_rq_insert", 1);
trace_set_clr_event(NULL, "block_rq_complete", 1);
trace_set_clr_event(NULL, "debug_allocate_large_pages", 1);
trace_set_clr_event(NULL, "dump_allocate_large_pages", 1);
trace_set_clr_event("mtk_events", NULL, 1);
trace_set_clr_event("ipi", NULL, 1);
trace_set_clr_event("met_bio", NULL, 1);
trace_set_clr_event("met_fuse", NULL, 1);
tracing_on();
} else {
tracing_off();
trace_set_clr_event(NULL, NULL, 0);
}
}
#endif
#if defined(CONFIG_MTK_SCHED_TRACERS) && defined(CONFIG_HOTPLUG_CPU)
#include <linux/cpu.h>
#include <trace/events/mtk_events.h>
static DEFINE_PER_CPU(unsigned long long, last_event_ts);
static struct notifier_block hotplug_event_notifier;
static int hotplug_event_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
trace_cpu_hotplug(cpu, 1, per_cpu(last_event_ts, cpu));
per_cpu(last_event_ts, cpu) = ns2usecs(ftrace_now(cpu));
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
trace_cpu_hotplug(cpu, 0, per_cpu(last_event_ts, cpu));
per_cpu(last_event_ts, cpu) = ns2usecs(ftrace_now(cpu));
break;
default:
break;
}
return NOTIFY_OK;
}
static __init int hotplug_events_init(void)
{
hotplug_event_notifier.notifier_call = hotplug_event_notify;
hotplug_event_notifier.priority = 0;
register_cpu_notifier(&hotplug_event_notifier);
return 0;
}
early_initcall(hotplug_events_init);
#endif
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