525 lines
12 KiB
C
Executable file
525 lines
12 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#include <linux/kallsyms.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/proc_fs.h>
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#include <linux/printk.h>
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#include <linux/platform_device.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/utsname.h>
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#include <linux/uaccess.h>
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#ifdef MODULE
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#include <linux/tracepoint.h>
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#include <trace/events/initcall.h>
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#endif
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#define BOOT_STR_SIZE 256
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#define BUF_COUNT 12
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#define LOGS_PER_BUF 80
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#define MSG_SIZE 128
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struct log_t {
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/* task cmdline for first 16 bytes
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* and boot event for the rest
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*/
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char *comm_event;
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pid_t pid;
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u64 timestamp;
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};
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static struct log_t *bootprof[BUF_COUNT];
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static unsigned long log_count;
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static DEFINE_MUTEX(bootprof_lock);
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static bool enabled;
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static int bootprof_lk_t, bootprof_pl_t, bootprof_logo_t;
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static u64 timestamp_on, timestamp_off;
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static bool boot_finish;
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#ifdef CONFIG_BOOTPROF_THRESHOLD_MS
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#define BOOTPROF_THRESHOLD (CONFIG_BOOTPROF_THRESHOLD_MS*1000000)
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#else
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#define BOOTPROF_THRESHOLD 15000000
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#endif
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#ifdef MODULE
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static unsigned long long start_time;
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/* Data structures to store tracepoints information */
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struct bf_tp {
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const char *name;
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void *func;
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struct tracepoint *tp;
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void *data;
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bool init;
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};
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#else /*Build-in*/
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module_param_named(pl_t, bootprof_pl_t, int, 0644);
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module_param_named(lk_t, bootprof_lk_t, int, 0644);
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module_param_named(logo_t, bootprof_logo_t, int, 0644);
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#endif
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static long long msec_high(unsigned long long nsec)
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{
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if ((long long)nsec < 0) {
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nsec = -nsec;
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do_div(nsec, 1000000);
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return -nsec;
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}
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do_div(nsec, 1000000);
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return nsec;
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}
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static unsigned long msec_low(unsigned long long nsec)
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{
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if ((long long)nsec < 0)
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nsec = -nsec;
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return do_div(nsec, 1000000);
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}
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bool mt_boot_finish(void)
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{
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return boot_finish;
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}
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EXPORT_SYMBOL_GPL(mt_boot_finish);
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void bootprof_log_boot(char *str)
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{
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unsigned long long ts;
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struct log_t *p = NULL;
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size_t n;
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if (!str) {
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pr_info("[BOOTPROF] Null buffer. Skip log.\n");
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return;
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}
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if (!enabled)
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return;
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n = strlen(str) + 1;
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ts = sched_clock();
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pr_info("BOOTPROF:%10lld.%06ld:%s\n", msec_high(ts), msec_low(ts), str);
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mutex_lock(&bootprof_lock);
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if (log_count >= (LOGS_PER_BUF * BUF_COUNT)) {
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pr_info("[BOOTPROF] not enuough bootprof buffer\n");
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goto out;
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} else if (log_count && !(log_count % LOGS_PER_BUF)) {
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bootprof[log_count / LOGS_PER_BUF] =
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kcalloc(LOGS_PER_BUF, sizeof(struct log_t),
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GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN);
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}
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if (!bootprof[log_count / LOGS_PER_BUF]) {
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pr_info("no memory for bootprof\n");
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goto out;
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}
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p = &bootprof[log_count / LOGS_PER_BUF][log_count % LOGS_PER_BUF];
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p->timestamp = ts;
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p->pid = current->pid;
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n += TASK_COMM_LEN;
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p->comm_event = kzalloc(n, GFP_ATOMIC | __GFP_NORETRY |
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__GFP_NOWARN);
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if (!p->comm_event) {
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enabled = false;
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goto out;
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}
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memcpy(p->comm_event, current->comm, TASK_COMM_LEN);
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memcpy(p->comm_event + TASK_COMM_LEN, str, n - TASK_COMM_LEN);
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log_count++;
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out:
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mutex_unlock(&bootprof_lock);
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}
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EXPORT_SYMBOL_GPL(bootprof_log_boot);
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#ifdef CONFIG_SEC_BOOTSTAT
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extern void sec_boot_stat_set_bl_boot_time(int pl_t, int lk_t);
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#endif
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static void bootprof_bootloader(void)
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{
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struct device_node *node;
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int err = 0;
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node = of_find_node_by_name(NULL, "bootprof");
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if (node) {
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err |= of_property_read_s32(node, "pl_t", &bootprof_pl_t);
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err |= of_property_read_s32(node, "lk_t", &bootprof_lk_t);
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err |= of_property_read_s32(node, "lk_logo_t",
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&bootprof_logo_t);
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pr_info("BOOTPROF: DT(Err:0x%x) pl_t=%d, lk_t=%d, lk_logo_t=%d\n",
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err, bootprof_pl_t, bootprof_lk_t, bootprof_logo_t);
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#ifdef CONFIG_SEC_BOOTSTAT
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sec_boot_stat_set_bl_boot_time(bootprof_pl_t, bootprof_lk_t);
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#endif
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}
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}
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void bootprof_initcall(initcall_t fn, unsigned long long ts)
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{
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/* log more than threshold initcalls */
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unsigned long msec_rem;
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char msgbuf[MSG_SIZE];
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int len;
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if (ts > BOOTPROF_THRESHOLD) {
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msec_rem = do_div(ts, NSEC_PER_MSEC);
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len = scnprintf(msgbuf, sizeof(msgbuf),
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"initcall: %ps %5llu.%06lums",
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fn, ts, msec_rem);
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if (len < 0)
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pr_info("BOOTPROF: initcall - Invalid argument.\n");
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bootprof_log_boot(msgbuf);
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}
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}
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#ifndef MODULE
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/*Build-in*/
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void bootprof_probe(unsigned long long ts, struct device *dev,
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struct device_driver *drv, unsigned long probe)
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{
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/* log more than threshold probes*/
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unsigned long msec_rem;
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char msgbuf[MSG_SIZE];
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int pos, len;
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if (ts <= BOOTPROF_THRESHOLD)
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return;
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msec_rem = do_div(ts, NSEC_PER_MSEC);
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pos = scnprintf(msgbuf, sizeof(msgbuf), "probe: probe=%ps",
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(void *)probe);
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if (pos < 0)
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pos = 0;
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if (drv) {
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len = scnprintf(msgbuf + pos, sizeof(msgbuf) - pos,
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" drv=%s(%ps)", drv->name ? drv->name : "",
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(void *)drv);
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if (len >= 0)
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pos += len;
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}
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if (dev && dev->init_name) {
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len = scnprintf(msgbuf + pos, sizeof(msgbuf) - pos,
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" dev=%s(%ps)", dev->init_name, (void *)dev);
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if (len >= 0)
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pos += len;
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}
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scnprintf(msgbuf + pos, sizeof(msgbuf) - pos,
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" %5llu.%06lums", ts, msec_rem);
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bootprof_log_boot(msgbuf);
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}
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void bootprof_pdev_register(unsigned long long ts, struct platform_device *pdev)
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{
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/* log more than threshold register*/
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unsigned long msec_rem;
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char msgbuf[MSG_SIZE];
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int len;
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if (ts <= BOOTPROF_THRESHOLD || !pdev)
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return;
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msec_rem = do_div(ts, NSEC_PER_MSEC);
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len = scnprintf(msgbuf, sizeof(msgbuf),
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"probe: pdev=%s(%ps) %5llu.%06lums",
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pdev->name, (void *)pdev, ts, msec_rem);
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if (len < 0)
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pr_info("BOOTPROF: pdev - Invalid argument.\n");
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bootprof_log_boot(msgbuf);
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}
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static void bootup_finish(void)
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{
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initcall_debug = 0;
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}
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#endif /*MODULE END*/
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static void mt_bootprof_switch(int on)
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{
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mutex_lock(&bootprof_lock);
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if (enabled ^ on) {
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unsigned long long ts = sched_clock();
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pr_info("BOOTPROF:%10lld.%06ld: %s\n",
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msec_high(ts), msec_low(ts), on ? "ON" : "OFF");
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if (on) {
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enabled = 1;
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timestamp_on = ts;
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} else {
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enabled = 0;
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timestamp_off = ts;
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if (!boot_finish)
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boot_finish = true;
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#ifndef MODULE
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bootup_finish();
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#endif
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}
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}
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mutex_unlock(&bootprof_lock);
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}
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static ssize_t
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mt_bootprof_write(struct file *filp, const char *ubuf, size_t cnt, loff_t *data)
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{
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char buf[BOOT_STR_SIZE];
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size_t copy_size = cnt;
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if (cnt >= sizeof(buf))
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copy_size = BOOT_STR_SIZE - 1;
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if (copy_from_user(&buf, ubuf, copy_size))
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return -EFAULT;
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if (cnt == 1 && buf[0] == '1') {
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mt_bootprof_switch(1);
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return 1;
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} else if (cnt == 1 && buf[0] == '0') {
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mt_bootprof_switch(0);
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return 1;
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}
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buf[copy_size] = 0;
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bootprof_log_boot(buf);
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return cnt;
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}
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static int mt_bootprof_show(struct seq_file *m, void *v)
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{
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unsigned int i;
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struct log_t *p;
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if (!m) {
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pr_info("seq_file is Null.\n");
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return 0;
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}
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seq_puts(m, "----------------------------------------\n");
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seq_printf(m, "%d BOOT PROF (unit:msec)\n", enabled);
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seq_puts(m, "----------------------------------------\n");
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if (bootprof_pl_t > 0 && bootprof_lk_t > 0) {
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seq_printf(m, "%10d : %s\n", bootprof_pl_t, "preloader");
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if (bootprof_logo_t > 0) {
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seq_printf(m, "%10d : %s (%s: %d)\n",
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bootprof_lk_t, "lk", "Start->Show logo",
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bootprof_logo_t);
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} else {
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seq_printf(m, "%10d : %s\n",
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bootprof_lk_t, "lk");
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}
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seq_puts(m, "----------------------------------------\n");
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}
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seq_printf(m, "%10lld.%06ld : ON (Threshold:%5lldms)\n",
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msec_high(timestamp_on), msec_low(timestamp_on),
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msec_high(BOOTPROF_THRESHOLD));
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for (i = 0; i < log_count; i++) {
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p = &bootprof[i / LOGS_PER_BUF][i % LOGS_PER_BUF];
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if (!p->comm_event)
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continue;
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seq_printf(m, "%10llu.%06lu :%5d-%-16s: %s\n",
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msec_high(p->timestamp),
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msec_low(p->timestamp),
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p->pid, p->comm_event,
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p->comm_event + TASK_COMM_LEN);
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}
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seq_printf(m, "%10lld.%06ld : OFF\n",
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msec_high(timestamp_off), msec_low(timestamp_off));
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seq_puts(m, "----------------------------------------\n");
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return 0;
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}
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/*** Seq operation of mtprof ****/
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static int mt_bootprof_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mt_bootprof_show, inode->i_private);
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}
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static const struct file_operations mt_bootprof_fops = {
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.open = mt_bootprof_open,
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.write = mt_bootprof_write,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#ifdef MODULE
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/* initcalls tracepoint cb if initcall_debug=1 */
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static __init_or_module void
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tp_initcall_start_cb(void *data, initcall_t fn)
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{
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unsigned long long *start_ts = (unsigned long long *)data;
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*start_ts = sched_clock();
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}
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static __init_or_module void
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tp_initcall_finish_cb(void *data, initcall_t fn, int ret)
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{
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unsigned long long *start_ts = (unsigned long long *)data;
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unsigned long long end_ts, duration;
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/*For bootprof module without initcall_start*/
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if (*start_ts == 0) {
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bootprof_log_boot("Kernel_init_done");
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return;
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}
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end_ts = sched_clock();
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duration = end_ts - *start_ts;
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bootprof_initcall(fn, duration);
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*start_ts = 0;
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}
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static struct bf_tp tp_table[] = {
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{.name = "initcall_start", .func = tp_initcall_start_cb,
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.data = &start_time},
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{.name = "initcall_finish", .func = tp_initcall_finish_cb,
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.data = &start_time},
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};
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/* Find the struct tracepoint* associated with a given tracepoint */
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/* name. */
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static void tp_lookup(struct tracepoint *tp, void *ignore)
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{
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int i;
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if (!tp || !tp->name)
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return;
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for (i = 0; i < sizeof(tp_table) / sizeof(struct bf_tp); i++) {
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if (strcmp(tp_table[i].name, tp->name) == 0)
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tp_table[i].tp = tp;
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}
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}
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/* claen up initcalls tracepoints */
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static void tp_cleanup(void)
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{
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int i;
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for (i = 0; i < sizeof(tp_table) / sizeof(struct bf_tp); i++) {
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if (tp_table[i].init) {
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tracepoint_probe_unregister(tp_table[i].tp,
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tp_table[i].func, tp_table[i].data);
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tp_table[i].init = false;
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}
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}
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}
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/* Register initcalls tracepoints */
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static void tp_init(void)
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{
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int i;
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/* Install the tracepoints */
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for_each_kernel_tracepoint(tp_lookup, NULL);
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for (i = 0; i < sizeof(tp_table) / sizeof(struct bf_tp); i++) {
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if (!tp_table[i].tp) {
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pr_info("[BOOTPROF]TP: %s not found\n",
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tp_table[i].name);
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/* Unload previously loaded */
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tp_cleanup();
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return;
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}
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tracepoint_probe_register(tp_table[i].tp, tp_table[i].func,
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tp_table[i].data);
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tp_table[i].init = true;
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}
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}
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static int __init bootprof_init(void)
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{
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struct proc_dir_entry *pe;
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memset(bootprof, 0, sizeof(struct log_t *) * BUF_COUNT);
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bootprof[0] = kcalloc(LOGS_PER_BUF, sizeof(struct log_t),
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GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN);
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if (!bootprof[0])
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goto fail;
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pe = proc_create("bootprof", 0664, NULL, &mt_bootprof_fops);
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if (!pe)
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return -ENOMEM;
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bootprof_bootloader();
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tp_init();
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mt_bootprof_switch(1);
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fail:
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return 0;
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}
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static void __exit bootprof_exit(void)
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{
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struct log_t *p = NULL;
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int i;
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enabled = 0;
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tp_cleanup();
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if (log_count > 0) {
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mutex_lock(&bootprof_lock);
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for (i = 0; i < log_count; i++) {
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p = &bootprof[i / LOGS_PER_BUF][i % LOGS_PER_BUF];
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kfree(p->comm_event);
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}
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for (i = 0; i < ((log_count / LOGS_PER_BUF) + 1); i++)
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kfree(bootprof[i]);
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mutex_unlock(&bootprof_lock);
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}
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remove_proc_entry("bootprof", NULL);
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pr_info("bootprof module exit.\n");
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}
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module_init(bootprof_init);
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module_exit(bootprof_exit);
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MODULE_DESCRIPTION("MEDIATEK BOOT TIME PROFILING");
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MODULE_LICENSE("GPL v2");
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#else /*Build-in*/
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static int __init init_boot_prof(void)
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{
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struct proc_dir_entry *pe;
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pe = proc_create("bootprof", 0664, NULL, &mt_bootprof_fops);
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if (!pe)
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return -ENOMEM;
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return 0;
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}
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static int __init init_bootprof_buf(void)
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{
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memset(bootprof, 0, sizeof(struct log_t *) * BUF_COUNT);
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bootprof[0] = kcalloc(LOGS_PER_BUF, sizeof(struct log_t),
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GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN);
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if (!bootprof[0])
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goto fail;
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bootprof_bootloader();
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mt_bootprof_switch(1);
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fail:
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return 0;
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}
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early_initcall(init_bootprof_buf);
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device_initcall(init_boot_prof);
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#endif /*MODULE END*/
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