308 lines
8.2 KiB
C
308 lines
8.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020 MediaTek Inc.
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*/
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#include <linux/proc_fs.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/kallsyms.h>
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#include <linux/nmi.h>
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#include <linux/uaccess.h>
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#ifdef CONFIG_MTK_AEE_IPANIC
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#include <mt-plat/mboot_params.h>
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#endif
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#include "tick-internal.h"
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static char print_at_AEE_buffer[256];
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#define SEQ_printf_at_AEE(m, x...) do { \
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if (snprintf(print_at_AEE_buffer, sizeof(print_at_AEE_buffer), x) > 0) \
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aee_sram_fiq_log(print_at_AEE_buffer);\
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} while (0)
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static void print_name_offset(struct seq_file *m, void *sym,
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struct hrtimer *timer)
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{
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char symname[KSYM_NAME_LEN];
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if (lookup_symbol_name((unsigned long)sym, symname) < 0) {
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SEQ_printf_at_AEE(m, "<%pK>", sym);
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} else {
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SEQ_printf_at_AEE(m, "%s", symname);
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if (timer && !strncmp(symname, "hrtimer_wakeup",
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strlen("hrtimer_wakeup"))) {
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struct hrtimer_sleeper *t =
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container_of(timer, struct hrtimer_sleeper,
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timer);
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SEQ_printf_at_AEE(m, " (task: %s)", t->task->comm);
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}
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}
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}
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static void
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print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer,
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int idx, u64 now)
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{
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#ifdef CONFIG_TIMER_STATS
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char tmp[TASK_COMM_LEN + 1];
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#endif
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SEQ_printf_at_AEE(m, " #%d: ", idx);
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print_name_offset(m, taddr, NULL);
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SEQ_printf_at_AEE(m, ", ");
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print_name_offset(m, timer->function, taddr);
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SEQ_printf_at_AEE(m, ", S:%02x", timer->state);
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#ifdef CONFIG_TIMER_STATS
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SEQ_printf_at_AEE(m, ", ");
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print_name_offset(m, timer->start_site, NULL);
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memcpy(tmp, timer->start_comm, TASK_COMM_LEN);
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tmp[TASK_COMM_LEN] = 0;
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SEQ_printf_at_AEE(m, ", %s/%d", tmp, timer->start_pid);
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#endif
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SEQ_printf_at_AEE(m, "\n");
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SEQ_printf_at_AEE(m,
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" # expires at %llu-%llu nsecs [in %lld to %lld nsecs]\n",
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(unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)),
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(unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)),
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(long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now),
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(long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now));
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}
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static void
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print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base,
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u64 now)
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{
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struct hrtimer *timer = NULL, tmp;
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unsigned long next = 0, i;
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struct timerqueue_node *curr = NULL;
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unsigned long flags;
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next_one:
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i = 0;
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touch_nmi_watchdog();
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raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
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curr = timerqueue_getnext(&base->active);
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/*
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* Crude but we have to do this O(N*N) thing, because
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* we have to unlock the base when printing:
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*/
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while (curr && i < next) {
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curr = timerqueue_iterate_next(curr);
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i++;
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}
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if (curr) {
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timer = container_of(curr, struct hrtimer, node);
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tmp = *timer;
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raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
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print_timer(m, timer, &tmp, i, now);
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next++;
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goto next_one;
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}
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raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
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}
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static void
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print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
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{
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SEQ_printf_at_AEE(m, " .base: %pK\n", base);
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SEQ_printf_at_AEE(m, " .index: %d\n", base->index);
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SEQ_printf_at_AEE(m, " .resolution: %u nsecs\n", hrtimer_resolution);
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SEQ_printf_at_AEE(m, " .get_time: ");
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print_name_offset(m, base->get_time, NULL);
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SEQ_printf_at_AEE(m, "\n");
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#ifdef CONFIG_HIGH_RES_TIMERS
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SEQ_printf_at_AEE(m, " .offset: %llu nsecs\n",
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(unsigned long long) ktime_to_ns(base->offset));
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#endif
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SEQ_printf_at_AEE(m, "active timers:\n");
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print_active_timers(m, base, now + ktime_to_ns(base->offset));
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}
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static void print_cpu(struct seq_file *m, int cpu, u64 now)
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{
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struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
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int i;
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SEQ_printf_at_AEE(m, "cpu: %d\n", cpu);
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for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
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SEQ_printf_at_AEE(m, " clock %d:\n", i);
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print_base(m, cpu_base->clock_base + i, now);
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}
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#define P(x) \
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SEQ_printf_at_AEE(m, " .%-15s: %llu\n", #x, \
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(unsigned long long)(cpu_base->x))
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#define P_ns(x) \
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SEQ_printf_at_AEE(m, " .%-15s: %llu nsecs\n", #x, \
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(unsigned long long)(ktime_to_ns(cpu_base->x)))
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#ifdef CONFIG_HIGH_RES_TIMERS
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P_ns(expires_next);
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P(hres_active);
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P(nr_events);
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P(nr_retries);
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P(nr_hangs);
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P(max_hang_time);
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#endif
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#undef P
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#undef P_ns
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#ifdef CONFIG_TICK_ONESHOT
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# define P(x) \
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SEQ_printf_at_AEE(m, " .%-15s: %llu\n", #x, \
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(unsigned long long)(ts->x))
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# define P_ns(x) \
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SEQ_printf_at_AEE(m, " .%-15s: %llu nsecs\n", #x, \
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(unsigned long long)(ktime_to_ns(ts->x)))
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{
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struct tick_sched *ts = tick_get_tick_sched(cpu);
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P(nohz_mode);
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P_ns(last_tick);
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P(tick_stopped);
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P(idle_jiffies);
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P(idle_calls);
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P(idle_sleeps);
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P_ns(idle_entrytime);
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P_ns(idle_waketime);
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P_ns(idle_exittime);
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P_ns(idle_sleeptime);
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P_ns(iowait_sleeptime);
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P(last_jiffies);
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P(next_timer);
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P_ns(idle_expires);
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SEQ_printf_at_AEE(m, "jiffies: %llu\n",
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(unsigned long long)jiffies);
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}
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#endif
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#undef P
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#undef P_ns
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SEQ_printf_at_AEE(m, "\n");
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}
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#ifdef CONFIG_GENERIC_CLOCKEVENTS
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static void
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print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
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{
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struct clock_event_device *dev = td->evtdev;
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touch_nmi_watchdog();
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SEQ_printf_at_AEE(m, "Tick Device: mode: %d\n", td->mode);
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if (cpu < 0)
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SEQ_printf_at_AEE(m, "Broadcast device\n");
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else
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SEQ_printf_at_AEE(m, "Per CPU device: %d\n", cpu);
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SEQ_printf_at_AEE(m, "Clock Event Device: ");
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if (!dev) {
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SEQ_printf_at_AEE(m, "<NULL>\n");
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return;
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}
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SEQ_printf_at_AEE(m, "%s\n", dev->name);
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SEQ_printf_at_AEE(m, " max_delta_ns: %llu\n",
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(unsigned long long) dev->max_delta_ns);
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SEQ_printf_at_AEE(m, " min_delta_ns: %llu\n",
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(unsigned long long) dev->min_delta_ns);
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SEQ_printf_at_AEE(m, " mult: %u\n", dev->mult);
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SEQ_printf_at_AEE(m, " shift: %u\n", dev->shift);
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SEQ_printf_at_AEE(m, " mode: %d\n",
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clockevent_get_state(dev));
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SEQ_printf_at_AEE(m, " next_event: %lld nsecs\n",
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(unsigned long long) ktime_to_ns(dev->next_event));
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SEQ_printf_at_AEE(m, " set_next_event: ");
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print_name_offset(m, dev->set_next_event, NULL);
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SEQ_printf_at_AEE(m, "\n");
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if (dev->set_state_shutdown) {
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SEQ_printf_at_AEE(m, " shutdown: ");
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print_name_offset(m, dev->set_state_shutdown, NULL);
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SEQ_printf_at_AEE(m, "\n");
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}
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if (dev->set_state_periodic) {
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SEQ_printf_at_AEE(m, " periodic: ");
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print_name_offset(m, dev->set_state_periodic, NULL);
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SEQ_printf_at_AEE(m, "\n");
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}
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if (dev->set_state_oneshot) {
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SEQ_printf_at_AEE(m, " oneshot: ");
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print_name_offset(m, dev->set_state_oneshot, NULL);
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SEQ_printf_at_AEE(m, "\n");
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}
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if (dev->set_state_oneshot_stopped) {
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SEQ_printf_at_AEE(m, " oneshot stopped: ");
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print_name_offset(m, dev->set_state_oneshot_stopped, NULL);
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SEQ_printf_at_AEE(m, "\n");
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}
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if (dev->tick_resume) {
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SEQ_printf_at_AEE(m, " resume: ");
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print_name_offset(m, dev->tick_resume, NULL);
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SEQ_printf_at_AEE(m, "\n");
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}
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SEQ_printf_at_AEE(m, " event_handler: ");
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print_name_offset(m, dev->event_handler, NULL);
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SEQ_printf_at_AEE(m, "\n");
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SEQ_printf_at_AEE(m, " retries: %lu\n", dev->retries);
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SEQ_printf_at_AEE(m, "\n");
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}
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static void timer_list_show_tickdevices_header(struct seq_file *m)
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{
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#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
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print_tickdevice(m, tick_get_broadcast_device(), -1);
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SEQ_printf_at_AEE(m, "tick_broadcast_mask: %*pb\n",
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cpumask_pr_args(tick_get_broadcast_mask()));
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#ifdef CONFIG_TICK_ONESHOT
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SEQ_printf_at_AEE(m, "tick_broadcast_oneshot_mask: %*pb\n",
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cpumask_pr_args(tick_get_broadcast_oneshot_mask()));
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#endif
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SEQ_printf_at_AEE(m, "\n");
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#endif
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}
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#endif
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static inline void timer_list_header(struct seq_file *m, u64 now)
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{
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SEQ_printf_at_AEE(m, "Timer List Version: v0.8\n");
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SEQ_printf_at_AEE(m, "HRTIMER_MAX_CLOCK_BASES: %d\n",
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HRTIMER_MAX_CLOCK_BASES);
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SEQ_printf_at_AEE(m, "now at %lld nsecs\n", (unsigned long long)now);
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SEQ_printf_at_AEE(m, "\n");
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}
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void timer_list_aee_dump(int exclude_cpus)
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{
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u64 now = ktime_to_ns(ktime_get());
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int cpu;
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timer_list_header(NULL, now);
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for_each_online_cpu(cpu)
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if ((exclude_cpus & (1 << cpu)) == 0)
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print_cpu(NULL, cpu, now);
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#ifdef CONFIG_GENERIC_CLOCKEVENTS
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timer_list_show_tickdevices_header(NULL);
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for_each_online_cpu(cpu)
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if ((exclude_cpus & (1 << cpu)) == 0)
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print_tickdevice(NULL, tick_get_device(cpu), cpu);
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#endif
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}
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