/*
 * Copyright (c) 2018-2020 The Linux Foundation. All rights reserved.
 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/**
 * DOC: Implements general SM debug framework
 */
#include <qdf_threads.h>
#include <wlan_sm_engine.h>
#include <wlan_sm_engine_dbg.h>

void wlan_sm_save_history(struct wlan_sm *sm,
			  enum wlan_sm_trace_type trace_type,
			  uint8_t initial_state, uint8_t final_state,
			  uint16_t event_type)
{
	struct wlan_sm_history *p_sm_history = &sm->history;
	struct wlan_sm_history_info *p_memento;

	/*
	 * History saved in circular buffer.
	 * Save a pointer to next write location and increment pointer.
	 */
	qdf_spin_lock_bh(&p_sm_history->sm_history_lock);
	p_memento = &p_sm_history->data[p_sm_history->index];
	p_sm_history->index++;

	p_sm_history->index %= WLAN_SM_ENGINE_HISTORY_SIZE;

	qdf_spin_unlock_bh(&p_sm_history->sm_history_lock);

	qdf_mem_zero(p_memento, sizeof(*p_memento));
	p_memento->trace_type = trace_type;
	p_memento->initial_state = initial_state;
	p_memento->final_state = final_state;
	p_memento->event_type = event_type;
	p_memento->time = qdf_get_log_timestamp();
	qdf_scnprintf(p_memento->pid_name, WLAN_SM_PID_MAX_LEN, "%.6s",
		      qdf_get_current_comm());
}

void wlan_sm_history_init(struct wlan_sm *sm)
{
	qdf_mem_zero(&sm->history, sizeof(struct wlan_sm_history));
	qdf_spinlock_create(&sm->history.sm_history_lock);
}

void wlan_sm_history_delete(struct wlan_sm *sm)
{
	qdf_spinlock_destroy(&sm->history.sm_history_lock);
}

static void wlan_sm_print_history_entry(struct wlan_sm *sm,
					struct wlan_sm_history_info *ent,
					uint16_t i)
{
	const char *event_name = NULL;

	if (sm->event_names) {
		if (ent->event_type < sm->num_event_names)
			event_name = sm->event_names[ent->event_type];

		if (!ent->trace_type)
			return;

		sm_engine_nofl_err(
			"| 0x%016llx |%6d |%6s |%11d |%23s[%3d] |%19s[%2d] |%19s[%2d] |",
			ent->time, i, ent->pid_name, ent->trace_type,
			event_name ? event_name : "UNKNOWN_EVENT",
			ent->event_type,
			sm->state_info[ent->initial_state].name,
			ent->initial_state,
			sm->state_info[ent->final_state].name,
			ent->final_state);
	} else {
		sm_engine_nofl_err(
			"| 0x%016llx |%6d |%6s |%11d |%28d |%19s[%2d] |%19s[%2d] |",
			ent->time, i, ent->pid_name, ent->trace_type,
			ent->event_type,
			sm->state_info[ent->initial_state].name,
			ent->initial_state,
			sm->state_info[ent->final_state].name,
			ent->final_state);
	}
}

void wlan_sm_print_history(struct wlan_sm *sm)
{
	struct wlan_sm_history *p_sm_history = &sm->history;
	uint8_t i;
	uint8_t idx;

	/*
	 * History saved in circular buffer.
	 * Save a pointer to next write location and increment pointer.
	 */
	qdf_spin_lock_bh(&p_sm_history->sm_history_lock);

	sm_engine_nofl_err("|%19s |%6s |%6s |%11s |%28s |%23s |%23s |", "Time",
			   "Index", "PID", "Trace Type", "Event",
			   "Initial State", "Final State");

	for (i = 0; i < WLAN_SM_ENGINE_HISTORY_SIZE; i++) {
		idx = (p_sm_history->index + i) % WLAN_SM_ENGINE_HISTORY_SIZE;
		wlan_sm_print_history_entry(
			sm, &p_sm_history->data[idx], idx);
	}

	qdf_spin_unlock_bh(&p_sm_history->sm_history_lock);
}

#if SM_HIST_DEBUGFS_SUPPORT
static void wlan_sm_print_fs_history_entry(struct wlan_sm *sm,
					   struct wlan_sm_history_info *ent,
					   uint16_t i, qdf_debugfs_file_t m)
{
	const char *event_name = NULL;

	if (sm->event_names) {
		if (ent->event_type < sm->num_event_names)
			event_name = sm->event_names[ent->event_type];

		if (!ent->trace_type)
			return;

		qdf_debugfs_printf(
			m, "| 0x%016llx |%6d |%6s |%11d |%23s[%3d] |%19s[%2d] |%19s[%2d] |\n",
			ent->time, i, ent->pid_name, ent->trace_type,
			event_name ? event_name : "UNKNOWN_EVENT",
			ent->event_type,
			sm->state_info[ent->initial_state].name,
			ent->initial_state,
			sm->state_info[ent->final_state].name,
			ent->final_state);
	} else {
		qdf_debugfs_printf(
			m, "| 0x%016llx |%6d |%6s |%11d |%28d |%19s[%2d] |%19s[%2d] |\n",
			ent->time, i, ent->pid_name, ent->trace_type,
			ent->event_type,
			sm->state_info[ent->initial_state].name,
			ent->initial_state,
			sm->state_info[ent->final_state].name,
			ent->final_state);
	}
}

void wlan_sm_print_fs_history(struct wlan_sm *sm, qdf_debugfs_file_t m)
{
	struct wlan_sm_history *p_sm_history = &sm->history;
	uint8_t i;
	uint8_t idx;

	/*
	 * History saved in circular buffer.
	 * Save a pointer to next write location and increment pointer.
	 */
	qdf_spin_lock_bh(&p_sm_history->sm_history_lock);
	qdf_debugfs_printf(m, "|%19s |%6s |%6s |%11s |%28s |%23s |%23s |\n", "Time",
			   "Index", "PID", "Trace Type", "Event",
			   "Initial State", "Final State");

	for (i = 0; i < WLAN_SM_ENGINE_HISTORY_SIZE; i++) {
		idx = (p_sm_history->index + i) % WLAN_SM_ENGINE_HISTORY_SIZE;
		wlan_sm_print_fs_history_entry(sm, &p_sm_history->data[idx],
					       idx, m);
	}

	qdf_spin_unlock_bh(&p_sm_history->sm_history_lock);
}
#endif