1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
30  * IEEE 802.11 PHY-related support.
208     [16] = { .phy = HT,     39000,    0x00,      N(4),   8 },
215     [22] = { .phy = HT,     39000,    0x00,     N(10),   6 },
223     [29] = { .phy = HT,     39000,    0x00,     N(17),   6 },
252     [12] = { .phy = HT,     39000,    0x00,      N(4),   4 },
259     [18] = { .phy = HT,     39000,    0x00,     N(10),   2 },
267     [25] = { .phy = HT,     39000,    0x00,     N(17),   2 },
306 	for (i = 0; i < nitems(rt->rateCodeToIndex); i++)  in ieee80211_setup_ratetable()
307 		rt->rateCodeToIndex[i] = (uint8_t) -1;  in ieee80211_setup_ratetable()
308 	for (i = 0; i < rt->rateCount; i++) {  in ieee80211_setup_ratetable()
309 		uint8_t code = rt->info[i].dot11Rate;  in ieee80211_setup_ratetable()
310 		uint8_t cix = rt->info[i].ctlRateIndex;  in ieee80211_setup_ratetable()
311 		uint8_t ctl_rate = rt->info[cix].dot11Rate;  in ieee80211_setup_ratetable()
322 		if (rt->info[i].phy == IEEE80211_T_HT) {  in ieee80211_setup_ratetable()
326 		/* XXX assume the control rate is non-MCS? */  in ieee80211_setup_ratetable()
328 		rt->rateCodeToIndex[code] = i;  in ieee80211_setup_ratetable()
333 		 *     the static tables are setup with an 11b-compatible  in ieee80211_setup_ratetable()
340 		rt->info[i].lpAckDuration = ieee80211_compute_duration(rt,  in ieee80211_setup_ratetable()
342 		rt->info[i].spAckDuration = ieee80211_compute_duration(rt,  in ieee80211_setup_ratetable()
401 		      __func__, c->ic_freq, c->ic_flags);  in ieee80211_get_ratetable()
452 	/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */  in ieee80211_rate2plcp()
461 	/* CCK rates (IEEE Std 802.11b-1999 page 15, subclause 18.2.3.3) */  in ieee80211_rate2plcp()
466 	/* IEEE Std 802.11g-2003 page 19, subclause 19.3.2.1 */  in ieee80211_rate2plcp()
505 	uint8_t rix = rt->rateCodeToIndex[rate];  in ieee80211_compute_duration()
509 	KASSERT(rix != (uint8_t)-1, ("rate %d has no info", rate));  in ieee80211_compute_duration()
510 	kbps = rt->info[rix].rateKbps;  in ieee80211_compute_duration()
514 	switch (rt->info[rix].phy) {  in ieee80211_compute_duration()
517 		if (isShortPreamble && rt->info[rix].shortPreamble)  in ieee80211_compute_duration()
554 		/* we still save OFDM rates in kbps - so double them */  in ieee80211_compute_duration()
565 		      rt->info[rix].phy, rate);  in ieee80211_compute_duration()
630  * This is based on 802.11-2020 21.5 (Parameters for VHT-MCSs.)
659  * See 802.11-2020 21.5 (Parameters for VHT-MCSs) for more details.
673 		return (ieee80211_vht_mcs_allowed_list_20[nss - 1]);  in ieee80211_phy_vht_get_mcs_mask()
675 		return (ieee80211_vht_mcs_allowed_list_40[nss - 1]);  in ieee80211_phy_vht_get_mcs_mask()
677 		return (ieee80211_vht_mcs_allowed_list_80[nss - 1]);  in ieee80211_phy_vht_get_mcs_mask()
679 		return (ieee80211_vht_mcs_allowed_list_160[nss - 1]);  in ieee80211_phy_vht_get_mcs_mask()
690  * See 802.11-2020 21.5 (Parameters for VHT-MCSs) for more details.
718  * These parameters are taken from 802.11-2020 Table 21-29
719  * (VHT-MCSs for Mandatory 20 MHZ, Nss=1).
743  * @param is_shortgi	True if short guard-interval (400nS)
761 	 * Short-GI - 3.6uS symbol time, long-GI - 4.0uS symbol time  in ieee80211_phy_vht_get_mcs_kbit()
763 	 * See 802.11-2020 Table 21-5 (Timing-related constraints.)  in ieee80211_phy_vht_get_mcs_kbit()
773 	 * See 802.11-2020 Table 21-5 (Timing-related constraints.)  in ieee80211_phy_vht_get_mcs_kbit()