1 // SPDX-License-Identifier: ISC
4  * Copyright (C) 2021-2022 Intel Corporation
16 /* Number of kilo-symbols (symbols * 1024) for a packet with (bps) bits per
17  * symbol. We use k-symbols to avoid rounding in the _TIME macros below.
42 /* Transmission time (1024 usec) for a packet containing (ksyms) * k-symbols */
64  * Define group sort order: HT40 -> SGI -> #streams
87 	_streams - 1
92 	_MAX(0, 16 - __builtin_clz(duration))
121 	 (_streams) - 1)
166 	 (_streams) - 1)
383 				    bool cck, int len)  in ieee80211_calc_legacy_rate_duration()  argument
387 	if (cck) {  in ieee80211_calc_legacy_rate_duration()
407 	bool sgi = status->enc_flags & RX_ENC_FLAG_SHORT_GI;  in ieee80211_get_rate_duration()
412 	switch (status->bw) {  in ieee80211_get_rate_duration()
430 	switch (status->encoding) {  in ieee80211_get_rate_duration()
432 		streams = status->nss;  in ieee80211_get_rate_duration()
433 		idx = status->rate_idx;  in ieee80211_get_rate_duration()
437 		streams = ((status->rate_idx >> 3) & 3) + 1;  in ieee80211_get_rate_duration()
438 		idx = status->rate_idx & 7;  in ieee80211_get_rate_duration()
442 		streams = status->nss;  in ieee80211_get_rate_duration()
443 		idx = status->rate_idx;  in ieee80211_get_rate_duration()
444 		group = HE_GROUP_IDX(streams, status->he_gi, bw);  in ieee80211_get_rate_duration()
451 	if (WARN_ON_ONCE((status->encoding != RX_ENC_HE && streams > 4) ||  in ieee80211_get_rate_duration()
452 			 (status->encoding == RX_ENC_HE && streams > 8)))  in ieee80211_get_rate_duration()
473 	if (status->encoding == RX_ENC_LEGACY) {  in ieee80211_calc_rx_airtime()
475 		bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;  in ieee80211_calc_rx_airtime()
476 		bool cck;  in ieee80211_calc_rx_airtime()  local
478 		/* on 60GHz or sub-1GHz band, there are no legacy rates */  in ieee80211_calc_rx_airtime()
479 		if (WARN_ON_ONCE(status->band == NL80211_BAND_60GHZ ||  in ieee80211_calc_rx_airtime()
480 				 status->band == NL80211_BAND_S1GHZ))  in ieee80211_calc_rx_airtime()
483 		sband = hw->wiphy->bands[status->band];  in ieee80211_calc_rx_airtime()
484 		if (!sband || status->rate_idx >= sband->n_bitrates)  in ieee80211_calc_rx_airtime()
487 		rate = &sband->bitrates[status->rate_idx];  in ieee80211_calc_rx_airtime()
488 		cck = rate->flags & IEEE80211_RATE_MANDATORY_B;  in ieee80211_calc_rx_airtime()
490 		return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,  in ieee80211_calc_rx_airtime()
491 							   cck, len);  in ieee80211_calc_rx_airtime()
510 	struct ieee80211_supported_band *sband = hw->wiphy->bands[band];  in ieee80211_fill_rate_info()
516 	stat->bw = ri->bw;  in ieee80211_fill_rate_info()
517 	stat->nss = ri->nss;  in ieee80211_fill_rate_info()
518 	stat->rate_idx = ri->mcs;  in ieee80211_fill_rate_info()
520 	if (ri->flags & RATE_INFO_FLAGS_HE_MCS)  in ieee80211_fill_rate_info()
521 		stat->encoding = RX_ENC_HE;  in ieee80211_fill_rate_info()
522 	else if (ri->flags & RATE_INFO_FLAGS_VHT_MCS)  in ieee80211_fill_rate_info()
523 		stat->encoding = RX_ENC_VHT;  in ieee80211_fill_rate_info()
524 	else if (ri->flags & RATE_INFO_FLAGS_MCS)  in ieee80211_fill_rate_info()
525 		stat->encoding = RX_ENC_HT;  in ieee80211_fill_rate_info()
527 		stat->encoding = RX_ENC_LEGACY;  in ieee80211_fill_rate_info()
529 	if (ri->flags & RATE_INFO_FLAGS_SHORT_GI)  in ieee80211_fill_rate_info()
530 		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;  in ieee80211_fill_rate_info()
532 	stat->he_gi = ri->he_gi;  in ieee80211_fill_rate_info()
534 	if (stat->encoding != RX_ENC_LEGACY)  in ieee80211_fill_rate_info()
537 	stat->rate_idx = 0;  in ieee80211_fill_rate_info()
538 	for (i = 0; i < sband->n_bitrates; i++) {  in ieee80211_fill_rate_info()
539 		if (ri->legacy != sband->bitrates[i].bitrate)  in ieee80211_fill_rate_info()
542 		stat->rate_idx = i;  in ieee80211_fill_rate_info()
555 	stat->band = band;  in ieee80211_fill_rx_status()
560 	if (rate->idx < 0 || !rate->count)  in ieee80211_fill_rx_status()
561 		return -1;  in ieee80211_fill_rx_status()
563 	if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)  in ieee80211_fill_rx_status()
564 		stat->bw = RATE_INFO_BW_160;  in ieee80211_fill_rx_status()
565 	else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)  in ieee80211_fill_rx_status()
566 		stat->bw = RATE_INFO_BW_80;  in ieee80211_fill_rx_status()
567 	else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)  in ieee80211_fill_rx_status()
568 		stat->bw = RATE_INFO_BW_40;  in ieee80211_fill_rx_status()
570 		stat->bw = RATE_INFO_BW_20;  in ieee80211_fill_rx_status()
572 	stat->enc_flags = 0;  in ieee80211_fill_rx_status()
573 	if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)  in ieee80211_fill_rx_status()
574 		stat->enc_flags |= RX_ENC_FLAG_SHORTPRE;  in ieee80211_fill_rx_status()
575 	if (rate->flags & IEEE80211_TX_RC_SHORT_GI)  in ieee80211_fill_rx_status()
576 		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;  in ieee80211_fill_rx_status()
578 	stat->rate_idx = rate->idx;  in ieee80211_fill_rx_status()
579 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {  in ieee80211_fill_rx_status()
580 		stat->encoding = RX_ENC_VHT;  in ieee80211_fill_rx_status()
581 		stat->rate_idx = ieee80211_rate_get_vht_mcs(rate);  in ieee80211_fill_rx_status()
582 		stat->nss = ieee80211_rate_get_vht_nss(rate);  in ieee80211_fill_rx_status()
583 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {  in ieee80211_fill_rx_status()
584 		stat->encoding = RX_ENC_HT;  in ieee80211_fill_rx_status()
586 		stat->encoding = RX_ENC_LEGACY;  in ieee80211_fill_rx_status()
612 	for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {  in ieee80211_calc_tx_airtime()
613 		struct ieee80211_tx_rate *rate = &info->status.rates[i];  in ieee80211_calc_tx_airtime()
617 							      info->band, len);  in ieee80211_calc_tx_airtime()
621 		duration += cur_duration * rate->count;  in ieee80211_calc_tx_airtime()
636 	bool cck, short_pream;  in ieee80211_calc_expected_tx_airtime()  local
643 	conf = rcu_dereference(vif->bss_conf.chanctx_conf);  in ieee80211_calc_expected_tx_airtime()
645 		band = conf->def.chan->band;  in ieee80211_calc_expected_tx_airtime()
646 		shift = ieee80211_chandef_get_shift(&conf->def);  in ieee80211_calc_expected_tx_airtime()
653 		struct ieee80211_tx_rate *tx_rate = &sta->deflink.tx_stats.last_rate;  in ieee80211_calc_expected_tx_airtime()
654 		struct rate_info *ri = &sta->deflink.tx_stats.last_rate_info;  in ieee80211_calc_expected_tx_airtime()
671 		 * assuming un-aggregated tx in all cases.  in ieee80211_calc_expected_tx_airtime()
698 	/* No station to get latest rate from, so calculate the worst-case  in ieee80211_calc_expected_tx_airtime()
701 	sband = hw->wiphy->bands[band];  in ieee80211_calc_expected_tx_airtime()
703 	basic_rates = vif->bss_conf.basic_rates;  in ieee80211_calc_expected_tx_airtime()
704 	short_pream = vif->bss_conf.use_short_preamble;  in ieee80211_calc_expected_tx_airtime()
706 	rateidx = basic_rates ? ffs(basic_rates) - 1 : 0;  in ieee80211_calc_expected_tx_airtime()
707 	rate = sband->bitrates[rateidx].bitrate << shift;  in ieee80211_calc_expected_tx_airtime()
708 	cck = sband->bitrates[rateidx].flags & IEEE80211_RATE_MANDATORY_B;  in ieee80211_calc_expected_tx_airtime()
710 	return ieee80211_calc_legacy_rate_duration(rate, short_pream, cck, len);  in ieee80211_calc_expected_tx_airtime()