iwlwifi/dvm/rs.c

27 #define IWL_RATE_MAX_WINDOW		62	/* # tx in history window */
208 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
210 	window->data = 0;
211 	window->success_counter = 0;
212 	window->success_ratio = IWL_INVALID_VALUE;
213 	window->counter = 0;
214 	window->average_tpt = IWL_INVALID_VALUE;
215 	window->stamp = 0;
422  * rs_collect_tx_data - Update the success/failure sliding window
424  * We keep a sliding window of the last 62 packets transmitted
425  * at this rate.  window->data contains the bitmask of successful
431 	struct iwl_rate_scale_data *window = NULL;
438 	/* Select window for current tx bit rate */
439 	window = &(tbl->win[scale_index]);
446 	 * history window; anything older isn't really relevant any more.
447 	 * If we have filled up the sliding window, drop the oldest attempt;
453 		if (window->counter >= IWL_RATE_MAX_WINDOW) {
456 			window->counter = IWL_RATE_MAX_WINDOW - 1;
458 			if (window->data & mask) {
459 				window->data &= ~mask;
460 				window->success_counter--;
465 		window->counter++;
468 		window->data <<= 1;
472 			window->success_counter++;
473 			window->data |= 0x1;
481 	if (window->counter > 0)
482 		window->success_ratio = 128 * (100 * window->success_counter)
483 					/ window->counter;
485 		window->success_ratio = IWL_INVALID_VALUE;
487 	fail_count = window->counter - window->success_counter;
491 	    (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH))
492 		window->average_tpt = (window->success_ratio * tpt + 64) / 128;
494 		window->average_tpt = IWL_INVALID_VALUE;
496 	/* Tag this window as having been updated */
497 	window->stamp = jiffies;
865 	IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
1382 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
1446 			if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1555 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
1614 			if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
1725 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
1780 			if (window->success_ratio >= IWL_RS_GOOD_RATIO)
1893 	struct iwl_rate_scale_data *window = &(tbl->win[index]);
1948 			if (window->success_ratio >= IWL_RS_GOOD_RATIO)
2170 	struct iwl_rate_scale_data *window = NULL;
2270 	/* Get expected throughput table and history window for current rate */
2281 		window = &(tbl->win[index]);
2285 	window = &(tbl->win[index]);
2294 	fail_count = window->counter - window->success_counter;
2296 			(window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) {
2299 			       window->success_counter, window->counter, index);
2302 		window->average_tpt = IWL_INVALID_VALUE;
2312 	if (window->average_tpt != ((window->success_ratio *
2315 		window->average_tpt = ((window->success_ratio *
2325 		if (window->average_tpt > lq_sta->last_tpt) {
2329 					window->success_ratio,
2330 					window->average_tpt,
2338 			current_tpt = window->average_tpt;
2345 					window->success_ratio,
2346 					window->average_tpt,
2383 	sr = window->success_ratio;
2386 	current_tpt = window->average_tpt;
2519 	if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) {
2736 	IWL_DEBUG_RATE(priv, "create station rate scale window\n");