151 lines
2.8 KiB
C
Executable file
151 lines
2.8 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/uaccess.h>
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#include "mtk_perfmgr_internal.h"
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#ifdef CONFIG_TRACING
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#include <linux/kallsyms.h>
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#include <linux/trace_events.h>
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#endif
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char *perfmgr_copy_from_user_for_proc(const char __user *buffer,
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size_t count)
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{
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char *buf = (char *)__get_free_page(GFP_USER);
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if (!buf)
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return NULL;
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if (count >= PAGE_SIZE)
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goto out;
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if (copy_from_user(buf, buffer, count))
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goto out;
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buf[count] = '\0';
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return buf;
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out:
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free_page((unsigned long)buf);
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return NULL;
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}
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int check_proc_write(int *data, const char *ubuf, size_t cnt)
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{
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char buf[128];
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if (cnt >= sizeof(buf))
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return -EINVAL;
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if (copy_from_user(buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = 0;
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if (kstrtoint(buf, 10, data))
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return -1;
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return 0;
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}
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int check_group_proc_write(int *cgroup, int *data,
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const char *ubuf, size_t cnt)
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{
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char buf[128];
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if (cnt >= sizeof(buf))
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return -EINVAL;
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if (copy_from_user(buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = 0;
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if (sscanf(buf, "%d %d", cgroup, data) != 2)
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return -1;
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return 0;
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}
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#ifdef CONFIG_TRACING
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static unsigned long __read_mostly tracing_mark_write_addr;
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static inline void __mt_update_tracing_mark_write_addr(void)
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{
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if (unlikely(tracing_mark_write_addr == 0))
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tracing_mark_write_addr =
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kallsyms_lookup_name("tracing_mark_write");
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}
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void perfmgr_trace_count(int val, const char *fmt, ...)
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{
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char log[128];
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va_list args;
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int len;
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if (powerhal_tid <= 0)
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return;
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memset(log, ' ', sizeof(log));
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va_start(args, fmt);
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len = vsnprintf(log, sizeof(log), fmt, args);
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va_end(args);
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if (unlikely(len < 0))
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return;
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else if (unlikely(len == 128))
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log[127] = '\0';
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__mt_update_tracing_mark_write_addr();
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preempt_disable();
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event_trace_printk(tracing_mark_write_addr, "C|%d|%s|%d\n",
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powerhal_tid, log, val);
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preempt_enable();
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}
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void perfmgr_trace_printk(char *module, char *string)
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{
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__mt_update_tracing_mark_write_addr();
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preempt_disable();
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event_trace_printk(tracing_mark_write_addr, "%d [%s] %s\n",
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current->tgid, module, string);
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preempt_enable();
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}
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void perfmgr_trace_begin(char *name, int id, int a, int b)
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{
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__mt_update_tracing_mark_write_addr();
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preempt_disable();
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event_trace_printk(tracing_mark_write_addr, "B|%d|%s|%d|%d|%d\n",
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current->tgid, name, id, a, b);
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preempt_enable();
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}
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void perfmgr_trace_end(void)
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{
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__mt_update_tracing_mark_write_addr();
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preempt_disable();
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event_trace_printk(tracing_mark_write_addr, "E\n");
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preempt_enable();
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}
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void perfmgr_trace_log(char *module, const char *fmt, ...)
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{
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char log[256];
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va_list args;
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int len;
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va_start(args, fmt);
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len = vsnprintf(log, sizeof(log), fmt, args);
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if (unlikely(len == 256))
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log[255] = '\0';
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va_end(args);
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perfmgr_trace_printk(module, log);
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}
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#endif
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