155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/*
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* Copyright (c) 2019 Intel corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <init.h>
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#include <string.h>
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#include <kernel.h>
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#include <sys/util.h>
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#include <sys/atomic.h>
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#include <tracing_core.h>
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#include <tracing_buffer.h>
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#include <tracing_backend.h>
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#define TRACING_CMD_ENABLE "enable"
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#define TRACING_CMD_DISABLE "disable"
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#ifdef CONFIG_TRACING_BACKEND_UART
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#define TRACING_BACKEND_NAME "tracing_backend_uart"
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#elif defined CONFIG_TRACING_BACKEND_USB
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#define TRACING_BACKEND_NAME "tracing_backend_usb"
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#elif defined CONFIG_TRACING_BACKEND_POSIX
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#define TRACING_BACKEND_NAME "tracing_backend_posix"
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#else
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#define TRACING_BACKEND_NAME ""
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#endif
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enum tracing_state {
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TRACING_DISABLE = 0,
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TRACING_ENABLE
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};
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static atomic_t tracing_state;
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static atomic_t tracing_packet_drop_num;
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static struct tracing_backend *working_backend;
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#ifdef CONFIG_TRACING_ASYNC
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#define TRACING_THREAD_NAME "tracing_thread"
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static k_tid_t tracing_thread_tid;
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static struct k_thread tracing_thread;
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static struct k_timer tracing_thread_timer;
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static K_SEM_DEFINE(tracing_thread_sem, 0, 1);
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static K_THREAD_STACK_DEFINE(tracing_thread_stack,
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CONFIG_TRACING_THREAD_STACK_SIZE);
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static void tracing_thread_func(void *dummy1, void *dummy2, void *dummy3)
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{
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u8_t *transferring_buf;
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u32_t transferring_length, tracing_buffer_max_length;
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tracing_thread_tid = k_current_get();
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tracing_buffer_max_length = tracing_buffer_capacity_get();
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while (true) {
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if (tracing_buffer_is_empty()) {
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k_sem_take(&tracing_thread_sem, K_FOREVER);
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} else {
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transferring_length =
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tracing_buffer_get_claim(
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&transferring_buf,
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tracing_buffer_max_length);
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tracing_buffer_handle(transferring_buf,
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transferring_length);
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tracing_buffer_get_finish(transferring_length);
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}
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}
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}
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static void tracing_thread_timer_expiry_fn(struct k_timer *timer)
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{
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k_sem_give(&tracing_thread_sem);
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}
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#endif
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static void tracing_set_state(enum tracing_state state)
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{
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atomic_set(&tracing_state, state);
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}
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static int tracing_init(struct device *arg)
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{
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ARG_UNUSED(arg);
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tracing_buffer_init();
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working_backend = tracing_backend_get(TRACING_BACKEND_NAME);
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tracing_backend_init(working_backend);
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atomic_set(&tracing_packet_drop_num, 0);
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if (IS_ENABLED(CONFIG_TRACING_HANDLE_HOST_CMD)) {
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tracing_set_state(TRACING_DISABLE);
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} else {
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tracing_set_state(TRACING_ENABLE);
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}
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#ifdef CONFIG_TRACING_ASYNC
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k_timer_init(&tracing_thread_timer,
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tracing_thread_timer_expiry_fn, NULL);
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k_thread_create(&tracing_thread, tracing_thread_stack,
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K_THREAD_STACK_SIZEOF(tracing_thread_stack),
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tracing_thread_func, NULL, NULL, NULL,
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K_LOWEST_APPLICATION_THREAD_PRIO, 0, K_NO_WAIT);
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k_thread_name_set(&tracing_thread, TRACING_THREAD_NAME);
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#endif
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return 0;
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}
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SYS_INIT(tracing_init, APPLICATION, 0);
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#ifdef CONFIG_TRACING_ASYNC
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void tracing_trigger_output(bool before_put_is_empty)
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{
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if (before_put_is_empty) {
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k_timer_start(&tracing_thread_timer,
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K_MSEC(CONFIG_TRACING_THREAD_WAIT_THRESHOLD),
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K_NO_WAIT);
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}
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}
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bool is_tracing_thread(void)
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{
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return (!k_is_in_isr() && (k_current_get() == tracing_thread_tid));
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}
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#endif
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bool is_tracing_enabled(void)
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{
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return atomic_get(&tracing_state) == TRACING_ENABLE;
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}
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void tracing_cmd_handle(u8_t *buf, u32_t length)
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{
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if (strncmp(buf, TRACING_CMD_ENABLE, length) == 0) {
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tracing_set_state(TRACING_ENABLE);
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} else if (strncmp(buf, TRACING_CMD_DISABLE, length) == 0) {
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tracing_set_state(TRACING_DISABLE);
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}
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}
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void tracing_buffer_handle(u8_t *data, u32_t length)
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{
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tracing_backend_output(working_backend, data, length);
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}
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void tracing_packet_drop_handle(void)
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{
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atomic_inc(&tracing_packet_drop_num);
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}
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