30 static void cpufreq_stats_update(struct cpufreq_stats *stats,  in cpufreq_stats_update()  argument
35 	stats->time_in_state[stats->last_index] += cur_time - time;  in cpufreq_stats_update()
36 	stats->last_time = cur_time;  in cpufreq_stats_update()
39 static void cpufreq_stats_reset_table(struct cpufreq_stats *stats)  in cpufreq_stats_reset_table()  argument
41 	unsigned int count = stats->max_state;  in cpufreq_stats_reset_table()
43 	memset(stats->time_in_state, 0, count * sizeof(u64));  in cpufreq_stats_reset_table()
44 	memset(stats->trans_table, 0, count * count * sizeof(int));  in cpufreq_stats_reset_table()
45 	stats->last_time = local_clock();  in cpufreq_stats_reset_table()
46 	stats->total_trans = 0;  in cpufreq_stats_reset_table()
49 	WRITE_ONCE(stats->reset_pending, 0);  in cpufreq_stats_reset_table()
55 	cpufreq_stats_update(stats, READ_ONCE(stats->reset_time));  in cpufreq_stats_reset_table()
60 	struct cpufreq_stats *stats = policy->stats;  in show_total_trans()  local
62 	if (READ_ONCE(stats->reset_pending))  in show_total_trans()
65 		return sprintf(buf, "%u\n", stats->total_trans);  in show_total_trans()
71 	struct cpufreq_stats *stats = policy->stats;  in show_time_in_state()  local
72 	bool pending = READ_ONCE(stats->reset_pending);  in show_time_in_state()
77 	for (i = 0; i < stats->state_num; i++) {  in show_time_in_state()
79 			if (i == stats->last_index) {  in show_time_in_state()
85 				time = local_clock() - READ_ONCE(stats->reset_time);  in show_time_in_state()
90 			time = stats->time_in_state[i];  in show_time_in_state()
91 			if (i == stats->last_index)  in show_time_in_state()
92 				time += local_clock() - stats->last_time;  in show_time_in_state()
95 		len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],  in show_time_in_state()
106 	struct cpufreq_stats *stats = policy->stats;  in store_reset()  local
112 	WRITE_ONCE(stats->reset_time, local_clock());  in store_reset()
118 	WRITE_ONCE(stats->reset_pending, 1);  in store_reset()
126 	struct cpufreq_stats *stats = policy->stats;  in show_trans_table()  local
127 	bool pending = READ_ONCE(stats->reset_pending);  in show_trans_table()
133 	for (i = 0; i < stats->state_num; i++) {  in show_trans_table()
137 				stats->freq_table[i]);  in show_trans_table()
144 	for (i = 0; i < stats->state_num; i++) {  in show_trans_table()
149 				stats->freq_table[i]);  in show_trans_table()
151 		for (j = 0; j < stats->state_num; j++) {  in show_trans_table()
158 				count = stats->trans_table[i * stats->max_state + j];  in show_trans_table()
187 static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)  in freq_table_get_index()  argument
190 	for (index = 0; index < stats->max_state; index++)  in freq_table_get_index()
191 		if (stats->freq_table[index] == freq)  in freq_table_get_index()
198 	struct cpufreq_stats *stats = policy->stats;  in cpufreq_stats_free_table()  local
201 	if (!stats)  in cpufreq_stats_free_table()
207 	kfree(stats->time_in_state);  in cpufreq_stats_free_table()
208 	kfree(stats);  in cpufreq_stats_free_table()
209 	policy->stats = NULL;  in cpufreq_stats_free_table()
215 	struct cpufreq_stats *stats;  in cpufreq_stats_create_table()  local
224 	if (policy->stats)  in cpufreq_stats_create_table()
227 	stats = kzalloc(sizeof(*stats), GFP_KERNEL);  in cpufreq_stats_create_table()
228 	if (!stats)  in cpufreq_stats_create_table()
236 	stats->time_in_state = kzalloc(alloc_size, GFP_KERNEL);  in cpufreq_stats_create_table()
237 	if (!stats->time_in_state)  in cpufreq_stats_create_table()
240 	stats->freq_table = (unsigned int *)(stats->time_in_state + count);  in cpufreq_stats_create_table()
242 	stats->trans_table = stats->freq_table + count;  in cpufreq_stats_create_table()
244 	stats->max_state = count;  in cpufreq_stats_create_table()
248 		if (freq_table_get_index(stats, pos->frequency) == -1)  in cpufreq_stats_create_table()
249 			stats->freq_table[i++] = pos->frequency;  in cpufreq_stats_create_table()
251 	stats->state_num = i;  in cpufreq_stats_create_table()
252 	stats->last_time = local_clock();  in cpufreq_stats_create_table()
253 	stats->last_index = freq_table_get_index(stats, policy->cur);  in cpufreq_stats_create_table()
255 	policy->stats = stats;  in cpufreq_stats_create_table()
260 	policy->stats = NULL;  in cpufreq_stats_create_table()
261 	kfree(stats->time_in_state);  in cpufreq_stats_create_table()
263 	kfree(stats);  in cpufreq_stats_create_table()
269 	struct cpufreq_stats *stats = policy->stats;  in cpufreq_stats_record_transition()  local
272 	if (unlikely(!stats))  in cpufreq_stats_record_transition()
275 	if (unlikely(READ_ONCE(stats->reset_pending)))  in cpufreq_stats_record_transition()
276 		cpufreq_stats_reset_table(stats);  in cpufreq_stats_record_transition()
278 	old_index = stats->last_index;  in cpufreq_stats_record_transition()
279 	new_index = freq_table_get_index(stats, new_freq);  in cpufreq_stats_record_transition()
285 	cpufreq_stats_update(stats, stats->last_time);  in cpufreq_stats_record_transition()
287 	stats->last_index = new_index;  in cpufreq_stats_record_transition()
288 	stats->trans_table[old_index * stats->max_state + new_index]++;  in cpufreq_stats_record_transition()
289 	stats->total_trans++;  in cpufreq_stats_record_transition()