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.
26 	  ((ksyms) * 4 * 18) / 20 :		/* 3.6 us per sym */	\
27 	  ((ksyms) * 4)			/* 4.0 us per sym */	\
30 /* Transmit duration for the raw data part of an average sized packet */
42 /* Transmission time (1024 usec) for a packet containing (ksyms) * k-symbols */
45 	 ((ksyms) * 16 * 17) / 20 :		/* 13.6 us per sym */	\
47 	  ((ksyms) * 16 * 18) / 20 :		/* 14.4 us per sym */	\
48 	  ((ksyms) * 16)			/* 16.0 us per sym */	\
51 /* Transmit duration for the raw data part of an average sized packet */
75  * Define group sort order: HT40 -> SGI -> #streams
107 	_streams - 1
111 #define GROUP_SHIFT(duration)						\  argument
112 	_MAX(0, 16 - __builtin_clz(duration))
118 	.duration = {							\
141 	 (_streams) - 1)
149 	.duration = {							\
186 	 (_streams) - 1)
191 	.duration = {							\
234 	 (_streams) - 1)
239 	.duration = {									\
291 	u16 duration[MCS_GROUP_RATES];  member
488 	u32 duration;  in ieee80211_calc_legacy_rate_duration()  local
491 		duration = 144 + 48; /* preamble + PLCP */  in ieee80211_calc_legacy_rate_duration()
493 			duration >>= 1;  in ieee80211_calc_legacy_rate_duration()
495 		duration += 10; /* SIFS */  in ieee80211_calc_legacy_rate_duration()
497 		duration = 20 + 16; /* premable + SIFS */  in ieee80211_calc_legacy_rate_duration()
501 	duration += (len * 10) / bitrate;  in ieee80211_calc_legacy_rate_duration()
503 	return duration;  in ieee80211_calc_legacy_rate_duration()
510 	bool sgi = status->enc_flags & RX_ENC_FLAG_SHORT_GI;  in ieee80211_get_rate_duration()
513 	u32 duration;  in ieee80211_get_rate_duration()  local
515 	switch (status->bw) {  in ieee80211_get_rate_duration()
536 	switch (status->encoding) {  in ieee80211_get_rate_duration()
538 		streams = status->nss;  in ieee80211_get_rate_duration()
539 		idx = status->rate_idx;  in ieee80211_get_rate_duration()
543 		streams = ((status->rate_idx >> 3) & 3) + 1;  in ieee80211_get_rate_duration()
544 		idx = status->rate_idx & 7;  in ieee80211_get_rate_duration()
548 		streams = status->nss;  in ieee80211_get_rate_duration()
549 		idx = status->rate_idx;  in ieee80211_get_rate_duration()
550 		group = HE_GROUP_IDX(streams, status->he_gi, bw);  in ieee80211_get_rate_duration()
553 		streams = status->nss;  in ieee80211_get_rate_duration()
554 		idx = status->rate_idx;  in ieee80211_get_rate_duration()
555 		group = EHT_GROUP_IDX(streams, status->eht.gi, bw);  in ieee80211_get_rate_duration()
562 	switch (status->encoding) {  in ieee80211_get_rate_duration()
577 	duration = airtime_mcs_groups[group].duration[idx];  in ieee80211_get_rate_duration()
578 	duration <<= airtime_mcs_groups[group].shift;  in ieee80211_get_rate_duration()
581 	return duration;  in ieee80211_get_rate_duration()
590 	u32 duration, overhead = 0;  in ieee80211_calc_rx_airtime()  local
592 	if (status->encoding == RX_ENC_LEGACY) {  in ieee80211_calc_rx_airtime()
594 		bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;  in ieee80211_calc_rx_airtime()
597 		/* on 60GHz or sub-1GHz band, there are no legacy rates */  in ieee80211_calc_rx_airtime()
598 		if (WARN_ON_ONCE(status->band == NL80211_BAND_60GHZ ||  in ieee80211_calc_rx_airtime()
599 				 status->band == NL80211_BAND_S1GHZ))  in ieee80211_calc_rx_airtime()
602 		sband = hw->wiphy->bands[status->band];  in ieee80211_calc_rx_airtime()
603 		if (!sband || status->rate_idx >= sband->n_bitrates)  in ieee80211_calc_rx_airtime()
606 		rate = &sband->bitrates[status->rate_idx];  in ieee80211_calc_rx_airtime()
607 		cck = rate->flags & IEEE80211_RATE_MANDATORY_B;  in ieee80211_calc_rx_airtime()
609 		return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,  in ieee80211_calc_rx_airtime()
613 	duration = ieee80211_get_rate_duration(hw, status, &overhead);  in ieee80211_calc_rx_airtime()
614 	if (!duration)  in ieee80211_calc_rx_airtime()
617 	duration *= len;  in ieee80211_calc_rx_airtime()
618 	duration /= AVG_PKT_SIZE;  in ieee80211_calc_rx_airtime()
619 	duration /= 1024;  in ieee80211_calc_rx_airtime()
621 	return duration + overhead;  in ieee80211_calc_rx_airtime()
629 	struct ieee80211_supported_band *sband = hw->wiphy->bands[band];  in ieee80211_fill_rate_info()
635 	stat->bw = ri->bw;  in ieee80211_fill_rate_info()
636 	stat->nss = ri->nss;  in ieee80211_fill_rate_info()
637 	stat->rate_idx = ri->mcs;  in ieee80211_fill_rate_info()
639 	if (ri->flags & RATE_INFO_FLAGS_EHT_MCS)  in ieee80211_fill_rate_info()
640 		stat->encoding = RX_ENC_EHT;  in ieee80211_fill_rate_info()
641 	else if (ri->flags & RATE_INFO_FLAGS_HE_MCS)  in ieee80211_fill_rate_info()
642 		stat->encoding = RX_ENC_HE;  in ieee80211_fill_rate_info()
643 	else if (ri->flags & RATE_INFO_FLAGS_VHT_MCS)  in ieee80211_fill_rate_info()
644 		stat->encoding = RX_ENC_VHT;  in ieee80211_fill_rate_info()
645 	else if (ri->flags & RATE_INFO_FLAGS_MCS)  in ieee80211_fill_rate_info()
646 		stat->encoding = RX_ENC_HT;  in ieee80211_fill_rate_info()
648 		stat->encoding = RX_ENC_LEGACY;  in ieee80211_fill_rate_info()
650 	if (ri->flags & RATE_INFO_FLAGS_SHORT_GI)  in ieee80211_fill_rate_info()
651 		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;  in ieee80211_fill_rate_info()
653 	switch (stat->encoding) {  in ieee80211_fill_rate_info()
655 		stat->eht.gi = ri->eht_gi;  in ieee80211_fill_rate_info()
658 		stat->he_gi = ri->he_gi;  in ieee80211_fill_rate_info()
662 	if (stat->encoding != RX_ENC_LEGACY)  in ieee80211_fill_rate_info()
665 	stat->rate_idx = 0;  in ieee80211_fill_rate_info()
666 	for (i = 0; i < sband->n_bitrates; i++) {  in ieee80211_fill_rate_info()
667 		if (ri->legacy != sband->bitrates[i].bitrate)  in ieee80211_fill_rate_info()
670 		stat->rate_idx = i;  in ieee80211_fill_rate_info()
683 	stat->band = band;  in ieee80211_fill_rx_status()
689 		return -1;  in ieee80211_fill_rx_status()
691 	if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)  in ieee80211_fill_rx_status()
692 		stat->bw = RATE_INFO_BW_160;  in ieee80211_fill_rx_status()
693 	else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)  in ieee80211_fill_rx_status()
694 		stat->bw = RATE_INFO_BW_80;  in ieee80211_fill_rx_status()
695 	else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)  in ieee80211_fill_rx_status()
696 		stat->bw = RATE_INFO_BW_40;  in ieee80211_fill_rx_status()
698 		stat->bw = RATE_INFO_BW_20;  in ieee80211_fill_rx_status()
700 	stat->enc_flags = 0;  in ieee80211_fill_rx_status()
701 	if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)  in ieee80211_fill_rx_status()
702 		stat->enc_flags |= RX_ENC_FLAG_SHORTPRE;  in ieee80211_fill_rx_status()
703 	if (rate->flags & IEEE80211_TX_RC_SHORT_GI)  in ieee80211_fill_rx_status()
704 		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;  in ieee80211_fill_rx_status()
706 	stat->rate_idx = rate->idx;  in ieee80211_fill_rx_status()
707 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {  in ieee80211_fill_rx_status()
708 		stat->encoding = RX_ENC_VHT;  in ieee80211_fill_rx_status()
709 		stat->rate_idx = ieee80211_rate_get_vht_mcs(rate);  in ieee80211_fill_rx_status()
710 		stat->nss = ieee80211_rate_get_vht_nss(rate);  in ieee80211_fill_rx_status()
711 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {  in ieee80211_fill_rx_status()
712 		stat->encoding = RX_ENC_HT;  in ieee80211_fill_rx_status()
714 		stat->encoding = RX_ENC_LEGACY;  in ieee80211_fill_rx_status()
737 	u32 duration = 0;  in ieee80211_calc_tx_airtime()  local
740 	for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {  in ieee80211_calc_tx_airtime()
741 		struct ieee80211_tx_rate *rate = &info->status.rates[i];  in ieee80211_calc_tx_airtime()
745 							      info->band, len);  in ieee80211_calc_tx_airtime()
749 		duration += cur_duration * rate->count;  in ieee80211_calc_tx_airtime()
752 	return duration;  in ieee80211_calc_tx_airtime()
771 	conf = rcu_dereference(vif->bss_conf.chanctx_conf);  in ieee80211_calc_expected_tx_airtime()
773 		band = conf->def.chan->band;  in ieee80211_calc_expected_tx_airtime()
779 		struct ieee80211_tx_rate *tx_rate = &sta->deflink.tx_stats.last_rate;  in ieee80211_calc_expected_tx_airtime()
780 		struct rate_info *ri = &sta->deflink.tx_stats.last_rate_info;  in ieee80211_calc_expected_tx_airtime()
781 		u32 duration, overhead;  in ieee80211_calc_expected_tx_airtime()  local
790 		duration = ieee80211_get_rate_duration(hw, &stat, &overhead);  in ieee80211_calc_expected_tx_airtime()
797 		 * assuming un-aggregated tx in all cases.  in ieee80211_calc_expected_tx_airtime()
799 		if (duration > 400 * 1024) /* <= VHT20 MCS2 1S */  in ieee80211_calc_expected_tx_airtime()
801 		else if (duration > 250 * 1024) /* <= VHT20 MCS3 1S or MCS1 2S */  in ieee80211_calc_expected_tx_airtime()
803 		else if (duration > 150 * 1024) /* <= VHT20 MCS5 1S or MCS2 2S */  in ieee80211_calc_expected_tx_airtime()
805 		else if (duration > 70 * 1024) /* <= VHT20 MCS5 2S */  in ieee80211_calc_expected_tx_airtime()
808 			 duration > 20 * 1024) /* <= HE40 MCS6 2S */  in ieee80211_calc_expected_tx_airtime()
813 		duration *= len;  in ieee80211_calc_expected_tx_airtime()
814 		duration /= AVG_PKT_SIZE;  in ieee80211_calc_expected_tx_airtime()
815 		duration /= 1024;  in ieee80211_calc_expected_tx_airtime()
816 		duration += (overhead >> agg_shift);  in ieee80211_calc_expected_tx_airtime()
818 		return max_t(u32, duration, 4);  in ieee80211_calc_expected_tx_airtime()
824 	/* No station to get latest rate from, so calculate the worst-case  in ieee80211_calc_expected_tx_airtime()
825 	 * duration using the lowest configured basic rate.  in ieee80211_calc_expected_tx_airtime()
827 	sband = hw->wiphy->bands[band];  in ieee80211_calc_expected_tx_airtime()
829 	basic_rates = vif->bss_conf.basic_rates;  in ieee80211_calc_expected_tx_airtime()
830 	short_pream = vif->bss_conf.use_short_preamble;  in ieee80211_calc_expected_tx_airtime()
832 	rateidx = basic_rates ? ffs(basic_rates) - 1 : 0;  in ieee80211_calc_expected_tx_airtime()
833 	rate = sband->bitrates[rateidx].bitrate;  in ieee80211_calc_expected_tx_airtime()
834 	cck = sband->bitrates[rateidx].flags & IEEE80211_RATE_MANDATORY_B;  in ieee80211_calc_expected_tx_airtime()