125 static __u64 jent_loop_shuffle(struct rand_data *ec,  in jent_loop_shuffle()  argument
138 	if (ec)  in jent_loop_shuffle()
139 		time ^= ec->data;  in jent_loop_shuffle()
185 static __u64 jent_lfsr_time(struct rand_data *ec, __u64 time, __u64 loop_cnt)  in jent_lfsr_time()  argument
193 		jent_loop_shuffle(ec, MAX_FOLD_LOOP_BIT, MIN_FOLD_LOOP_BIT);  in jent_lfsr_time()
202 		new = ec->data;  in jent_lfsr_time()
228 	ec->data = new;  in jent_lfsr_time()
260 static unsigned int jent_memaccess(struct rand_data *ec, __u64 loop_cnt)  in jent_memaccess()  argument
267 		jent_loop_shuffle(ec, MAX_ACC_LOOP_BIT, MIN_ACC_LOOP_BIT);  in jent_memaccess()
269 	if (NULL == ec || NULL == ec->mem)  in jent_memaccess()
271 	wrap = ec->memblocksize * ec->memblocks;  in jent_memaccess()
280 	for (i = 0; i < (ec->memaccessloops + acc_loop_cnt); i++) {  in jent_memaccess()
281 		unsigned char *tmpval = ec->mem + ec->memlocation;  in jent_memaccess()
293 		ec->memlocation = ec->memlocation + ec->memblocksize - 1;  in jent_memaccess()
294 		ec->memlocation = ec->memlocation % wrap;  in jent_memaccess()
319 static int jent_stuck(struct rand_data *ec, __u64 current_delta)  in jent_stuck()  argument
321 	__s64 delta2 = ec->last_delta - current_delta;  in jent_stuck()
322 	__s64 delta3 = delta2 - ec->last_delta2;  in jent_stuck()
324 	ec->last_delta = current_delta;  in jent_stuck()
325 	ec->last_delta2 = delta2;  in jent_stuck()
347 static int jent_measure_jitter(struct rand_data *ec)  in jent_measure_jitter()  argument
353 	jent_memaccess(ec, 0);  in jent_measure_jitter()
360 	current_delta = time - ec->prev_time;  in jent_measure_jitter()
361 	ec->prev_time = time;  in jent_measure_jitter()
364 	jent_lfsr_time(ec, current_delta, 0);  in jent_measure_jitter()
367 	return jent_stuck(ec, current_delta);  in jent_measure_jitter()
377 static void jent_gen_entropy(struct rand_data *ec)  in jent_gen_entropy()  argument
382 	jent_measure_jitter(ec);  in jent_gen_entropy()
386 		if (jent_measure_jitter(ec))  in jent_gen_entropy()
393 		if (++k >= (DATA_SIZE_BITS * ec->osr))  in jent_gen_entropy()
406 static void jent_fips_test(struct rand_data *ec)  in jent_fips_test()  argument
412 	if (!ec->old_data) {  in jent_fips_test()
413 		ec->old_data = ec->data;  in jent_fips_test()
414 		jent_gen_entropy(ec);  in jent_fips_test()
417 	if (ec->data == ec->old_data)  in jent_fips_test()
420 	ec->old_data = ec->data;  in jent_fips_test()
445 int jent_read_entropy(struct rand_data *ec, unsigned char *data,  in jent_read_entropy()  argument
450 	if (!ec)  in jent_read_entropy()
456 		jent_gen_entropy(ec);  in jent_read_entropy()
457 		jent_fips_test(ec);  in jent_read_entropy()
462 		jent_memcpy(p, &ec->data, tocopy);  in jent_read_entropy()
524 	struct rand_data ec = { 0 };  in jent_entropy_init()  local
559 		ec.prev_time = time;  in jent_entropy_init()
560 		jent_lfsr_time(&ec, time, 0);  in jent_entropy_init()
575 		stuck = jent_stuck(&ec, delta);  in jent_entropy_init()