ieee80211_ht.c revision 219602
1170530Ssam/*- 2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3170530Ssam * All rights reserved. 4170530Ssam * 5170530Ssam * Redistribution and use in source and binary forms, with or without 6170530Ssam * modification, are permitted provided that the following conditions 7170530Ssam * are met: 8170530Ssam * 1. Redistributions of source code must retain the above copyright 9170530Ssam * notice, this list of conditions and the following disclaimer. 10170530Ssam * 2. Redistributions in binary form must reproduce the above copyright 11170530Ssam * notice, this list of conditions and the following disclaimer in the 12170530Ssam * documentation and/or other materials provided with the distribution. 13170530Ssam * 14170530Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15170530Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16170530Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17170530Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18170530Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19170530Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20170530Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21170530Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22170530Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23170530Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24170530Ssam */ 25170530Ssam 26170530Ssam#include <sys/cdefs.h> 27170530Ssam#ifdef __FreeBSD__ 28170530Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_ht.c 219602 2011-03-13 12:16:23Z bschmidt $"); 29170530Ssam#endif 30170530Ssam 31170530Ssam/* 32170530Ssam * IEEE 802.11n protocol support. 33170530Ssam */ 34170530Ssam 35170530Ssam#include "opt_inet.h" 36178354Ssam#include "opt_wlan.h" 37170530Ssam 38170530Ssam#include <sys/param.h> 39170530Ssam#include <sys/kernel.h> 40170530Ssam#include <sys/systm.h> 41170530Ssam#include <sys/endian.h> 42170530Ssam 43170530Ssam#include <sys/socket.h> 44170530Ssam 45170530Ssam#include <net/if.h> 46170530Ssam#include <net/if_media.h> 47170530Ssam#include <net/ethernet.h> 48170530Ssam 49170530Ssam#include <net80211/ieee80211_var.h> 50195377Ssam#include <net80211/ieee80211_action.h> 51178354Ssam#include <net80211/ieee80211_input.h> 52170530Ssam 53170530Ssam/* define here, used throughout file */ 54170530Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 55170530Ssam#define SM(_v, _f) (((_v) << _f##_S) & _f) 56170530Ssam 57219456Sbschmidtconst struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = { 58219456Sbschmidt { 13, 14, 27, 30 }, /* MCS 0 */ 59219456Sbschmidt { 26, 29, 54, 60 }, /* MCS 1 */ 60219456Sbschmidt { 39, 43, 81, 90 }, /* MCS 2 */ 61219456Sbschmidt { 52, 58, 108, 120 }, /* MCS 3 */ 62219456Sbschmidt { 78, 87, 162, 180 }, /* MCS 4 */ 63219456Sbschmidt { 104, 116, 216, 240 }, /* MCS 5 */ 64219456Sbschmidt { 117, 130, 243, 270 }, /* MCS 6 */ 65219456Sbschmidt { 130, 144, 270, 300 }, /* MCS 7 */ 66219456Sbschmidt { 26, 29, 54, 60 }, /* MCS 8 */ 67219456Sbschmidt { 52, 58, 108, 120 }, /* MCS 9 */ 68219456Sbschmidt { 78, 87, 162, 180 }, /* MCS 10 */ 69219456Sbschmidt { 104, 116, 216, 240 }, /* MCS 11 */ 70219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 12 */ 71219456Sbschmidt { 208, 231, 432, 480 }, /* MCS 13 */ 72219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 14 */ 73219456Sbschmidt { 260, 289, 540, 600 }, /* MCS 15 */ 74219456Sbschmidt { 39, 43, 81, 90 }, /* MCS 16 */ 75219456Sbschmidt { 78, 87, 162, 180 }, /* MCS 17 */ 76219456Sbschmidt { 117, 130, 243, 270 }, /* MCS 18 */ 77219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 19 */ 78219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 20 */ 79219456Sbschmidt { 312, 347, 648, 720 }, /* MCS 21 */ 80219456Sbschmidt { 351, 390, 729, 810 }, /* MCS 22 */ 81219456Sbschmidt { 390, 433, 810, 900 }, /* MCS 23 */ 82219456Sbschmidt { 52, 58, 108, 120 }, /* MCS 24 */ 83219456Sbschmidt { 104, 116, 216, 240 }, /* MCS 25 */ 84219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 26 */ 85219456Sbschmidt { 208, 231, 432, 480 }, /* MCS 27 */ 86219456Sbschmidt { 312, 347, 648, 720 }, /* MCS 28 */ 87219456Sbschmidt { 416, 462, 864, 960 }, /* MCS 29 */ 88219456Sbschmidt { 468, 520, 972, 1080 }, /* MCS 30 */ 89219456Sbschmidt { 520, 578, 1080, 1200 }, /* MCS 31 */ 90219456Sbschmidt { 0, 0, 12, 13 }, /* MCS 32 */ 91219456Sbschmidt { 78, 87, 162, 180 }, /* MCS 33 */ 92219456Sbschmidt { 104, 116, 216, 240 }, /* MCS 34 */ 93219456Sbschmidt { 130, 144, 270, 300 }, /* MCS 35 */ 94219456Sbschmidt { 117, 130, 243, 270 }, /* MCS 36 */ 95219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 37 */ 96219456Sbschmidt { 195, 217, 405, 450 }, /* MCS 38 */ 97219456Sbschmidt { 104, 116, 216, 240 }, /* MCS 39 */ 98219456Sbschmidt { 130, 144, 270, 300 }, /* MCS 40 */ 99219456Sbschmidt { 130, 144, 270, 300 }, /* MCS 41 */ 100219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 42 */ 101219456Sbschmidt { 182, 202, 378, 420 }, /* MCS 43 */ 102219456Sbschmidt { 182, 202, 378, 420 }, /* MCS 44 */ 103219456Sbschmidt { 208, 231, 432, 480 }, /* MCS 45 */ 104219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 46 */ 105219456Sbschmidt { 195, 217, 405, 450 }, /* MCS 47 */ 106219456Sbschmidt { 195, 217, 405, 450 }, /* MCS 48 */ 107219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 49 */ 108219456Sbschmidt { 273, 303, 567, 630 }, /* MCS 50 */ 109219456Sbschmidt { 273, 303, 567, 630 }, /* MCS 51 */ 110219456Sbschmidt { 312, 347, 648, 720 }, /* MCS 52 */ 111219456Sbschmidt { 130, 144, 270, 300 }, /* MCS 53 */ 112219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 54 */ 113219456Sbschmidt { 182, 202, 378, 420 }, /* MCS 55 */ 114219456Sbschmidt { 156, 173, 324, 360 }, /* MCS 56 */ 115219456Sbschmidt { 182, 202, 378, 420 }, /* MCS 57 */ 116219456Sbschmidt { 208, 231, 432, 480 }, /* MCS 58 */ 117219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 59 */ 118219456Sbschmidt { 208, 231, 432, 480 }, /* MCS 60 */ 119219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 61 */ 120219456Sbschmidt { 260, 289, 540, 600 }, /* MCS 62 */ 121219456Sbschmidt { 260, 289, 540, 600 }, /* MCS 63 */ 122219456Sbschmidt { 286, 318, 594, 660 }, /* MCS 64 */ 123219456Sbschmidt { 195, 217, 405, 450 }, /* MCS 65 */ 124219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 66 */ 125219456Sbschmidt { 273, 303, 567, 630 }, /* MCS 67 */ 126219456Sbschmidt { 234, 260, 486, 540 }, /* MCS 68 */ 127219456Sbschmidt { 273, 303, 567, 630 }, /* MCS 69 */ 128219456Sbschmidt { 312, 347, 648, 720 }, /* MCS 70 */ 129219456Sbschmidt { 351, 390, 729, 810 }, /* MCS 71 */ 130219456Sbschmidt { 312, 347, 648, 720 }, /* MCS 72 */ 131219456Sbschmidt { 351, 390, 729, 810 }, /* MCS 73 */ 132219456Sbschmidt { 390, 433, 810, 900 }, /* MCS 74 */ 133219456Sbschmidt { 390, 433, 810, 900 }, /* MCS 75 */ 134219456Sbschmidt { 429, 477, 891, 990 }, /* MCS 76 */ 135170530Ssam}; 136170530Ssam 137173273Ssam#ifdef IEEE80211_AMPDU_AGE 138193115Ssamstatic int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 139193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW, 140193115Ssam &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I", 141193115Ssam "AMPDU max reorder age (ms)"); 142173273Ssam#endif 143173273Ssam 144193115Ssamstatic int ieee80211_recv_bar_ena = 1; 145193115SsamSYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena, 146193115Ssam 0, "BAR frame processing (ena/dis)"); 147193115Ssam 148193115Ssamstatic int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */ 149193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW, 150193115Ssam &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I", 151193115Ssam "ADDBA request timeout (ms)"); 152193115Ssamstatic int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */ 153193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW, 154193115Ssam &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I", 155193115Ssam "ADDBA request backoff (ms)"); 156193115Ssamstatic int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */ 157193115SsamSYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLTYPE_INT | CTLFLAG_RW, 158193115Ssam &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 159193115Ssam 160193115Ssamstatic int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 161193115Ssamstatic int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 162193115Ssam 163195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_addba_request; 164195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_addba_response; 165195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_delba; 166195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave; 167195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ht_txchwidth; 168195377Ssam 169195377Ssamstatic ieee80211_send_action_func ht_send_action_ba_addba; 170195377Ssamstatic ieee80211_send_action_func ht_send_action_ba_delba; 171195377Ssamstatic ieee80211_send_action_func ht_send_action_ht_txchwidth; 172195377Ssam 173178354Ssamstatic void 174195377Ssamieee80211_ht_init(void) 175178354Ssam{ 176195377Ssam /* 177195377Ssam * Setup HT parameters that depends on the clock frequency. 178195377Ssam */ 179178354Ssam#ifdef IEEE80211_AMPDU_AGE 180178354Ssam ieee80211_ampdu_age = msecs_to_ticks(500); 181178354Ssam#endif 182178354Ssam ieee80211_addba_timeout = msecs_to_ticks(250); 183178354Ssam ieee80211_addba_backoff = msecs_to_ticks(10*1000); 184184280Ssam ieee80211_bar_timeout = msecs_to_ticks(250); 185195377Ssam /* 186195377Ssam * Register action frame handlers. 187195377Ssam */ 188195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 189195377Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 190195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 191195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 192195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 193195377Ssam IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 194195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 195195377Ssam IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 196195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 197195377Ssam IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 198195377Ssam 199195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 200195377Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 201195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 202195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 203195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 204195377Ssam IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 205195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 206195377Ssam IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 207178354Ssam} 208195377SsamSYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 209170530Ssam 210178354Ssamstatic int ieee80211_ampdu_enable(struct ieee80211_node *ni, 211178354Ssam struct ieee80211_tx_ampdu *tap); 212170530Ssamstatic int ieee80211_addba_request(struct ieee80211_node *ni, 213170530Ssam struct ieee80211_tx_ampdu *tap, 214170530Ssam int dialogtoken, int baparamset, int batimeout); 215170530Ssamstatic int ieee80211_addba_response(struct ieee80211_node *ni, 216170530Ssam struct ieee80211_tx_ampdu *tap, 217170530Ssam int code, int baparamset, int batimeout); 218170530Ssamstatic void ieee80211_addba_stop(struct ieee80211_node *ni, 219170530Ssam struct ieee80211_tx_ampdu *tap); 220184280Ssamstatic void ieee80211_bar_response(struct ieee80211_node *ni, 221184280Ssam struct ieee80211_tx_ampdu *tap, int status); 222184280Ssamstatic void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 223184280Ssamstatic void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 224191552Ssamstatic int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 225191552Ssam int baparamset, int batimeout, int baseqctl); 226191552Ssamstatic void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 227170530Ssam 228170530Ssamvoid 229170530Ssamieee80211_ht_attach(struct ieee80211com *ic) 230170530Ssam{ 231170530Ssam /* setup default aggregation policy */ 232195377Ssam ic->ic_recv_action = ieee80211_recv_action; 233170530Ssam ic->ic_send_action = ieee80211_send_action; 234178354Ssam ic->ic_ampdu_enable = ieee80211_ampdu_enable; 235170530Ssam ic->ic_addba_request = ieee80211_addba_request; 236170530Ssam ic->ic_addba_response = ieee80211_addba_response; 237170530Ssam ic->ic_addba_stop = ieee80211_addba_stop; 238184280Ssam ic->ic_bar_response = ieee80211_bar_response; 239191552Ssam ic->ic_ampdu_rx_start = ampdu_rx_start; 240191552Ssam ic->ic_ampdu_rx_stop = ampdu_rx_stop; 241170530Ssam 242173273Ssam ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 243173273Ssam ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 244178354Ssam} 245173273Ssam 246178354Ssamvoid 247178354Ssamieee80211_ht_detach(struct ieee80211com *ic) 248178354Ssam{ 249178354Ssam} 250173273Ssam 251178354Ssamvoid 252178354Ssamieee80211_ht_vattach(struct ieee80211vap *vap) 253178354Ssam{ 254178354Ssam 255178354Ssam /* driver can override defaults */ 256178354Ssam vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 257178354Ssam vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 258178354Ssam vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 259178354Ssam vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 260178354Ssam /* tx aggregation traffic thresholds */ 261178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 262178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 263178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 264178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 265178354Ssam 266178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 267170530Ssam /* 268173273Ssam * Device is HT capable; enable all HT-related 269173273Ssam * facilities by default. 270170530Ssam * XXX these choices may be too aggressive. 271170530Ssam */ 272193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_HT 273193655Ssam | IEEE80211_FHT_HTCOMPAT 274193655Ssam ; 275178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 276193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 277173273Ssam /* XXX infer from channel list? */ 278178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 279193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 280178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 281193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 282170530Ssam } 283183256Ssam /* enable RIFS if capable */ 284183256Ssam if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 285193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 286183256Ssam 287170530Ssam /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 288193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 289178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 290193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 291193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 292178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 293193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 294170530Ssam } 295178354Ssam /* NB: disable default legacy WDS, too many issues right now */ 296178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 297193655Ssam vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 298170530Ssam} 299170530Ssam 300170530Ssamvoid 301178354Ssamieee80211_ht_vdetach(struct ieee80211vap *vap) 302170530Ssam{ 303170530Ssam} 304170530Ssam 305219598Sbschmidtstatic int 306219598Sbschmidtht_getrate(struct ieee80211com *ic, int index, int mode, int ratetype) 307219598Sbschmidt{ 308219598Sbschmidt int mword, rate; 309219598Sbschmidt 310219598Sbschmidt mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode); 311219598Sbschmidt if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 312219598Sbschmidt return (0); 313219598Sbschmidt switch (ratetype) { 314219598Sbschmidt case 0: 315219598Sbschmidt rate = ieee80211_htrates[index].ht20_rate_800ns; 316219598Sbschmidt break; 317219598Sbschmidt case 1: 318219598Sbschmidt rate = ieee80211_htrates[index].ht20_rate_400ns; 319219598Sbschmidt break; 320219598Sbschmidt case 2: 321219598Sbschmidt rate = ieee80211_htrates[index].ht40_rate_800ns; 322219598Sbschmidt break; 323219598Sbschmidt default: 324219598Sbschmidt rate = ieee80211_htrates[index].ht40_rate_400ns; 325219598Sbschmidt break; 326219598Sbschmidt } 327219598Sbschmidt return (rate); 328219598Sbschmidt} 329219598Sbschmidt 330219598Sbschmidtstatic struct printranges { 331219598Sbschmidt int minmcs; 332219598Sbschmidt int maxmcs; 333219598Sbschmidt int txstream; 334219598Sbschmidt int ratetype; 335219598Sbschmidt int htcapflags; 336219598Sbschmidt} ranges[] = { 337219598Sbschmidt { 0, 7, 1, 0, 0 }, 338219598Sbschmidt { 8, 15, 2, 0, 0 }, 339219598Sbschmidt { 16, 23, 3, 0, 0 }, 340219598Sbschmidt { 24, 31, 4, 0, 0 }, 341219598Sbschmidt { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 342219598Sbschmidt { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 343219598Sbschmidt { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 344219598Sbschmidt { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 345219598Sbschmidt { 0, 0, 0, 0, 0 }, 346219598Sbschmidt}; 347219598Sbschmidt 348170530Ssamstatic void 349219598Sbschmidtht_rateprint(struct ieee80211com *ic, int mode, int ratetype) 350170530Ssam{ 351219598Sbschmidt struct ifnet *ifp = ic->ic_ifp; 352219598Sbschmidt int minrate, maxrate; 353219598Sbschmidt struct printranges *range; 354170530Ssam 355219598Sbschmidt for (range = ranges; range->txstream != 0; range++) { 356219598Sbschmidt if (ic->ic_txstream < range->txstream) 357170530Ssam continue; 358219598Sbschmidt if (range->htcapflags && 359219598Sbschmidt (ic->ic_htcaps & range->htcapflags) == 0) 360219598Sbschmidt continue; 361219598Sbschmidt if (ratetype < range->ratetype) 362219598Sbschmidt continue; 363219598Sbschmidt minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 364219598Sbschmidt maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 365219598Sbschmidt if (range->maxmcs) { 366219598Sbschmidt if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 367219598Sbschmidt range->minmcs, range->maxmcs, 368219598Sbschmidt minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 369219598Sbschmidt maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 370219598Sbschmidt } else { 371219598Sbschmidt if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs, 372219598Sbschmidt minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 373205277Srpaulo } 374170530Ssam } 375170530Ssam} 376170530Ssam 377205277Srpaulostatic void 378219598Sbschmidtht_announce(struct ieee80211com *ic, int mode) 379205277Srpaulo{ 380205277Srpaulo struct ifnet *ifp = ic->ic_ifp; 381205277Srpaulo const char *modestr = ieee80211_phymode_name[mode]; 382219598Sbschmidt 383219598Sbschmidt if_printf(ifp, "%s MCS 20Mhz\n", modestr); 384219598Sbschmidt ht_rateprint(ic, mode, 0); 385219598Sbschmidt if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 386219598Sbschmidt if_printf(ifp, "%s MCS 20Mhz SGI\n", modestr); 387219598Sbschmidt ht_rateprint(ic, mode, 1); 388219598Sbschmidt } 389219598Sbschmidt if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 390219598Sbschmidt if_printf(ifp, "%s MCS 40Mhz:\n", modestr); 391219598Sbschmidt ht_rateprint(ic, mode, 2); 392219598Sbschmidt } 393219598Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 394219598Sbschmidt (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 395219598Sbschmidt if_printf(ifp, "%s MCS 40Mhz SGI:\n", modestr); 396219598Sbschmidt ht_rateprint(ic, mode, 3); 397219598Sbschmidt } 398205277Srpaulo} 399205277Srpaulo 400170530Ssamvoid 401170530Ssamieee80211_ht_announce(struct ieee80211com *ic) 402170530Ssam{ 403219598Sbschmidt struct ifnet *ifp = ic->ic_ifp; 404219598Sbschmidt 405219598Sbschmidt if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 406219598Sbschmidt isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 407219598Sbschmidt if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 408170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 409219598Sbschmidt ht_announce(ic, IEEE80211_MODE_11NA); 410170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 411219598Sbschmidt ht_announce(ic, IEEE80211_MODE_11NG); 412170530Ssam} 413170530Ssam 414219602Sbschmidtstatic struct ieee80211_htrateset htrateset; 415219602Sbschmidt 416170530Ssamconst struct ieee80211_htrateset * 417170530Ssamieee80211_get_suphtrates(struct ieee80211com *ic, 418219602Sbschmidt const struct ieee80211_channel *c) 419170530Ssam{ 420219602Sbschmidt#define ADDRATE(x) do { \ 421219602Sbschmidt htrateset.rs_rates[htrateset.rs_nrates] = x; \ 422219602Sbschmidt htrateset.rs_nrates++; \ 423219602Sbschmidt} while (0) 424219602Sbschmidt int i; 425219602Sbschmidt 426219602Sbschmidt memset(&htrateset, 0, sizeof(struct ieee80211_htrateset)); 427219602Sbschmidt for (i = 0; i < ic->ic_txstream * 8; i++) 428219602Sbschmidt ADDRATE(i); 429219602Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 430219602Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 431219602Sbschmidt ADDRATE(i); 432219602Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 433219602Sbschmidt if (ic->ic_txstream >= 2) { 434219602Sbschmidt for (i = 33; i <= 38; i++) 435219602Sbschmidt ADDRATE(i); 436219602Sbschmidt } 437219602Sbschmidt if (ic->ic_txstream >= 3) { 438219602Sbschmidt for (i = 39; i <= 52; i++) 439219602Sbschmidt ADDRATE(i); 440219602Sbschmidt } 441219602Sbschmidt if (ic->ic_txstream == 4) { 442219602Sbschmidt for (i = 53; i <= 76; i++) 443219602Sbschmidt ADDRATE(i); 444219602Sbschmidt } 445219602Sbschmidt } 446219602Sbschmidt return &htrateset; 447219602Sbschmidt#undef ADDRATE 448170530Ssam} 449170530Ssam 450170530Ssam/* 451170530Ssam * Receive processing. 452170530Ssam */ 453170530Ssam 454170530Ssam/* 455170530Ssam * Decap the encapsulated A-MSDU frames and dispatch all but 456170530Ssam * the last for delivery. The last frame is returned for 457170530Ssam * delivery via the normal path. 458170530Ssam */ 459170530Ssamstruct mbuf * 460170530Ssamieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 461170530Ssam{ 462178354Ssam struct ieee80211vap *vap = ni->ni_vap; 463173462Ssam int framelen; 464170530Ssam struct mbuf *n; 465170530Ssam 466170530Ssam /* discard 802.3 header inserted by ieee80211_decap */ 467170530Ssam m_adj(m, sizeof(struct ether_header)); 468170530Ssam 469178354Ssam vap->iv_stats.is_amsdu_decap++; 470170530Ssam 471170530Ssam for (;;) { 472170530Ssam /* 473170530Ssam * Decap the first frame, bust it apart from the 474170530Ssam * remainder and deliver. We leave the last frame 475170530Ssam * delivery to the caller (for consistency with other 476170530Ssam * code paths, could also do it here). 477170530Ssam */ 478170530Ssam m = ieee80211_decap1(m, &framelen); 479170530Ssam if (m == NULL) { 480178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 481173462Ssam ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 482178354Ssam vap->iv_stats.is_amsdu_tooshort++; 483170530Ssam return NULL; 484170530Ssam } 485173462Ssam if (m->m_pkthdr.len == framelen) 486170530Ssam break; 487170530Ssam n = m_split(m, framelen, M_NOWAIT); 488170530Ssam if (n == NULL) { 489178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 490170530Ssam ni->ni_macaddr, "a-msdu", 491170530Ssam "%s", "unable to split encapsulated frames"); 492178354Ssam vap->iv_stats.is_amsdu_split++; 493170530Ssam m_freem(m); /* NB: must reclaim */ 494170530Ssam return NULL; 495170530Ssam } 496178354Ssam vap->iv_deliver_data(vap, ni, m); 497170530Ssam 498170530Ssam /* 499170530Ssam * Remove frame contents; each intermediate frame 500170530Ssam * is required to be aligned to a 4-byte boundary. 501170530Ssam */ 502170530Ssam m = n; 503170530Ssam m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 504170530Ssam } 505170530Ssam return m; /* last delivered by caller */ 506170530Ssam} 507170530Ssam 508170530Ssam/* 509170530Ssam * Purge all frames in the A-MPDU re-order queue. 510170530Ssam */ 511170530Ssamstatic void 512170530Ssamampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 513170530Ssam{ 514170530Ssam struct mbuf *m; 515170530Ssam int i; 516170530Ssam 517170530Ssam for (i = 0; i < rap->rxa_wnd; i++) { 518170530Ssam m = rap->rxa_m[i]; 519170530Ssam if (m != NULL) { 520170530Ssam rap->rxa_m[i] = NULL; 521170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 522170530Ssam m_freem(m); 523170530Ssam if (--rap->rxa_qframes == 0) 524170530Ssam break; 525170530Ssam } 526170530Ssam } 527170530Ssam KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 528170530Ssam ("lost %u data, %u frames on ampdu rx q", 529170530Ssam rap->rxa_qbytes, rap->rxa_qframes)); 530170530Ssam} 531170530Ssam 532170530Ssam/* 533178354Ssam * Start A-MPDU rx/re-order processing for the specified TID. 534178354Ssam */ 535191552Ssamstatic int 536191552Ssamampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 537191552Ssam int baparamset, int batimeout, int baseqctl) 538178354Ssam{ 539191552Ssam int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 540191552Ssam 541178354Ssam if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 542178354Ssam /* 543178354Ssam * AMPDU previously setup and not terminated with a DELBA, 544178354Ssam * flush the reorder q's in case anything remains. 545178354Ssam */ 546178354Ssam ampdu_rx_purge(rap); 547178354Ssam } 548178354Ssam memset(rap, 0, sizeof(*rap)); 549178354Ssam rap->rxa_wnd = (bufsiz == 0) ? 550178354Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 551191552Ssam rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START); 552178354Ssam rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 553191552Ssam 554191552Ssam return 0; 555178354Ssam} 556178354Ssam 557178354Ssam/* 558170530Ssam * Stop A-MPDU rx processing for the specified TID. 559170530Ssam */ 560170530Ssamstatic void 561191552Ssamampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 562170530Ssam{ 563205277Srpaulo 564170530Ssam ampdu_rx_purge(rap); 565178354Ssam rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 566170530Ssam} 567170530Ssam 568170530Ssam/* 569170530Ssam * Dispatch a frame from the A-MPDU reorder queue. The 570170530Ssam * frame is fed back into ieee80211_input marked with an 571183247Ssam * M_AMPDU_MPDU flag so it doesn't come back to us (it also 572170530Ssam * permits ieee80211_input to optimize re-processing). 573170530Ssam */ 574170530Ssamstatic __inline void 575170530Ssamampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 576170530Ssam{ 577183247Ssam m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 578192468Ssam /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 579192468Ssam (void) ieee80211_input(ni, m, 0, 0); 580170530Ssam} 581170530Ssam 582170530Ssam/* 583170530Ssam * Dispatch as many frames as possible from the re-order queue. 584170530Ssam * Frames will always be "at the front"; we process all frames 585170530Ssam * up to the first empty slot in the window. On completion we 586170530Ssam * cleanup state if there are still pending frames in the current 587170530Ssam * BA window. We assume the frame at slot 0 is already handled 588170530Ssam * by the caller; we always start at slot 1. 589170530Ssam */ 590170530Ssamstatic void 591170530Ssamampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 592170530Ssam{ 593178354Ssam struct ieee80211vap *vap = ni->ni_vap; 594170530Ssam struct mbuf *m; 595170530Ssam int i; 596170530Ssam 597170530Ssam /* flush run of frames */ 598170530Ssam for (i = 1; i < rap->rxa_wnd; i++) { 599170530Ssam m = rap->rxa_m[i]; 600170530Ssam if (m == NULL) 601170530Ssam break; 602170530Ssam rap->rxa_m[i] = NULL; 603170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 604170530Ssam rap->rxa_qframes--; 605170530Ssam 606170530Ssam ampdu_dispatch(ni, m); 607170530Ssam } 608170530Ssam /* 609170530Ssam * If frames remain, copy the mbuf pointers down so 610170530Ssam * they correspond to the offsets in the new window. 611170530Ssam */ 612170530Ssam if (rap->rxa_qframes != 0) { 613170530Ssam int n = rap->rxa_qframes, j; 614170530Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 615170530Ssam if (rap->rxa_m[j] != NULL) { 616170530Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 617170530Ssam rap->rxa_m[j] = NULL; 618170530Ssam if (--n == 0) 619170530Ssam break; 620170530Ssam } 621170530Ssam } 622170530Ssam KASSERT(n == 0, ("lost %d frames", n)); 623178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 624170530Ssam } 625173273Ssam /* 626173273Ssam * Adjust the start of the BA window to 627173273Ssam * reflect the frames just dispatched. 628173273Ssam */ 629173273Ssam rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 630178354Ssam vap->iv_stats.is_ampdu_rx_oor += i; 631170530Ssam} 632170530Ssam 633173273Ssam#ifdef IEEE80211_AMPDU_AGE 634170530Ssam/* 635173273Ssam * Dispatch all frames in the A-MPDU re-order queue. 636170530Ssam */ 637170530Ssamstatic void 638173273Ssamampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 639170530Ssam{ 640178354Ssam struct ieee80211vap *vap = ni->ni_vap; 641170530Ssam struct mbuf *m; 642170530Ssam int i; 643170530Ssam 644173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 645170530Ssam m = rap->rxa_m[i]; 646170530Ssam if (m == NULL) 647170530Ssam continue; 648170530Ssam rap->rxa_m[i] = NULL; 649170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 650173273Ssam rap->rxa_qframes--; 651178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 652173273Ssam 653170530Ssam ampdu_dispatch(ni, m); 654173273Ssam if (rap->rxa_qframes == 0) 655170530Ssam break; 656170530Ssam } 657170530Ssam} 658173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 659170530Ssam 660170530Ssam/* 661173273Ssam * Dispatch all frames in the A-MPDU re-order queue 662173273Ssam * preceding the specified sequence number. This logic 663173273Ssam * handles window moves due to a received MSDU or BAR. 664173273Ssam */ 665173273Ssamstatic void 666173273Ssamampdu_rx_flush_upto(struct ieee80211_node *ni, 667173273Ssam struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 668173273Ssam{ 669178354Ssam struct ieee80211vap *vap = ni->ni_vap; 670173273Ssam struct mbuf *m; 671173273Ssam ieee80211_seq seqno; 672173273Ssam int i; 673173273Ssam 674173273Ssam /* 675173273Ssam * Flush any complete MSDU's with a sequence number lower 676173273Ssam * than winstart. Gaps may exist. Note that we may actually 677173273Ssam * dispatch frames past winstart if a run continues; this is 678173273Ssam * an optimization that avoids having to do a separate pass 679173273Ssam * to dispatch frames after moving the BA window start. 680173273Ssam */ 681173273Ssam seqno = rap->rxa_start; 682173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 683173273Ssam m = rap->rxa_m[i]; 684173273Ssam if (m != NULL) { 685173273Ssam rap->rxa_m[i] = NULL; 686173273Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 687173273Ssam rap->rxa_qframes--; 688178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 689173273Ssam 690173273Ssam ampdu_dispatch(ni, m); 691173273Ssam } else { 692173273Ssam if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 693173273Ssam break; 694173273Ssam } 695173273Ssam seqno = IEEE80211_SEQ_INC(seqno); 696173273Ssam } 697173273Ssam /* 698173273Ssam * If frames remain, copy the mbuf pointers down so 699173273Ssam * they correspond to the offsets in the new window. 700173273Ssam */ 701173273Ssam if (rap->rxa_qframes != 0) { 702173273Ssam int n = rap->rxa_qframes, j; 703178354Ssam 704178354Ssam /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 705178354Ssam KASSERT(rap->rxa_m[0] == NULL, 706178354Ssam ("%s: BA window slot 0 occupied", __func__)); 707173273Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 708173273Ssam if (rap->rxa_m[j] != NULL) { 709173273Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 710173273Ssam rap->rxa_m[j] = NULL; 711173273Ssam if (--n == 0) 712173273Ssam break; 713173273Ssam } 714173273Ssam } 715173273Ssam KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 716173273Ssam "BA win <%d:%d> winstart %d", 717173273Ssam __func__, n, rap->rxa_qframes, i, rap->rxa_start, 718173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 719173273Ssam winstart)); 720178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 721173273Ssam } 722173273Ssam /* 723173273Ssam * Move the start of the BA window; we use the 724173273Ssam * sequence number of the last MSDU that was 725173273Ssam * passed up the stack+1 or winstart if stopped on 726173273Ssam * a gap in the reorder buffer. 727173273Ssam */ 728173273Ssam rap->rxa_start = seqno; 729173273Ssam} 730173273Ssam 731173273Ssam/* 732170530Ssam * Process a received QoS data frame for an HT station. Handle 733170530Ssam * A-MPDU reordering: if this frame is received out of order 734170530Ssam * and falls within the BA window hold onto it. Otherwise if 735173273Ssam * this frame completes a run, flush any pending frames. We 736170530Ssam * return 1 if the frame is consumed. A 0 is returned if 737170530Ssam * the frame should be processed normally by the caller. 738170530Ssam */ 739170530Ssamint 740170530Ssamieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 741170530Ssam{ 742170530Ssam#define IEEE80211_FC0_QOSDATA \ 743170530Ssam (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 744173273Ssam#define PROCESS 0 /* caller should process frame */ 745173273Ssam#define CONSUMED 1 /* frame consumed, caller does nothing */ 746178354Ssam struct ieee80211vap *vap = ni->ni_vap; 747170530Ssam struct ieee80211_qosframe *wh; 748170530Ssam struct ieee80211_rx_ampdu *rap; 749170530Ssam ieee80211_seq rxseq; 750170530Ssam uint8_t tid; 751170530Ssam int off; 752170530Ssam 753183247Ssam KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 754183247Ssam ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 755170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 756170530Ssam 757170530Ssam /* NB: m_len known to be sufficient */ 758170530Ssam wh = mtod(m, struct ieee80211_qosframe *); 759183247Ssam if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 760183247Ssam /* 761183247Ssam * Not QoS data, shouldn't get here but just 762183247Ssam * return it to the caller for processing. 763183247Ssam */ 764183247Ssam return PROCESS; 765183247Ssam } 766193840Ssam if (IEEE80211_IS_DSTODS(wh)) 767173273Ssam tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 768173273Ssam else 769173273Ssam tid = wh->i_qos[0]; 770173273Ssam tid &= IEEE80211_QOS_TID; 771170530Ssam rap = &ni->ni_rx_ampdu[tid]; 772170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 773170530Ssam /* 774170530Ssam * No ADDBA request yet, don't touch. 775170530Ssam */ 776173273Ssam return PROCESS; 777170530Ssam } 778182827Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 779182827Ssam if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 780182827Ssam /* 781182827Ssam * Fragments are not allowed; toss. 782182827Ssam */ 783182827Ssam IEEE80211_DISCARD_MAC(vap, 784182827Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 785182827Ssam "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 786182827Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 787182827Ssam vap->iv_stats.is_ampdu_rx_drop++; 788182827Ssam IEEE80211_NODE_STAT(ni, rx_drop); 789182827Ssam m_freem(m); 790182827Ssam return CONSUMED; 791182827Ssam } 792182827Ssam rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 793173273Ssam rap->rxa_nframes++; 794173273Ssamagain: 795170530Ssam if (rxseq == rap->rxa_start) { 796170530Ssam /* 797170530Ssam * First frame in window. 798170530Ssam */ 799170530Ssam if (rap->rxa_qframes != 0) { 800170530Ssam /* 801170530Ssam * Dispatch as many packets as we can. 802170530Ssam */ 803170530Ssam KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 804170530Ssam ampdu_dispatch(ni, m); 805170530Ssam ampdu_rx_dispatch(rap, ni); 806173273Ssam return CONSUMED; 807170530Ssam } else { 808170530Ssam /* 809170530Ssam * In order; advance window and notify 810170530Ssam * caller to dispatch directly. 811170530Ssam */ 812170530Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 813173273Ssam return PROCESS; 814170530Ssam } 815170530Ssam } 816170530Ssam /* 817173273Ssam * Frame is out of order; store if in the BA window. 818170530Ssam */ 819170530Ssam /* calculate offset in BA window */ 820170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 821173273Ssam if (off < rap->rxa_wnd) { 822170530Ssam /* 823173273Ssam * Common case (hopefully): in the BA window. 824205277Srpaulo * Sec 9.10.7.6.2 a) (p.137) 825173273Ssam */ 826173273Ssam#ifdef IEEE80211_AMPDU_AGE 827173273Ssam /* 828173273Ssam * Check for frames sitting too long in the reorder queue. 829173273Ssam * This should only ever happen if frames are not delivered 830173273Ssam * without the sender otherwise notifying us (e.g. with a 831173273Ssam * BAR to move the window). Typically this happens because 832173273Ssam * of vendor bugs that cause the sequence number to jump. 833173273Ssam * When this happens we get a gap in the reorder queue that 834173273Ssam * leaves frame sitting on the queue until they get pushed 835173273Ssam * out due to window moves. When the vendor does not send 836173273Ssam * BAR this move only happens due to explicit packet sends 837170530Ssam * 838173273Ssam * NB: we only track the time of the oldest frame in the 839173273Ssam * reorder q; this means that if we flush we might push 840173273Ssam * frames that still "new"; if this happens then subsequent 841173273Ssam * frames will result in BA window moves which cost something 842173273Ssam * but is still better than a big throughput dip. 843170530Ssam */ 844173273Ssam if (rap->rxa_qframes != 0) { 845173273Ssam /* XXX honor batimeout? */ 846173273Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 847173273Ssam /* 848173273Ssam * Too long since we received the first 849173273Ssam * frame; flush the reorder buffer. 850173273Ssam */ 851173273Ssam if (rap->rxa_qframes != 0) { 852178354Ssam vap->iv_stats.is_ampdu_rx_age += 853173273Ssam rap->rxa_qframes; 854173273Ssam ampdu_rx_flush(ni, rap); 855173273Ssam } 856173273Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 857173273Ssam return PROCESS; 858173273Ssam } 859173273Ssam } else { 860173273Ssam /* 861173273Ssam * First frame, start aging timer. 862173273Ssam */ 863173273Ssam rap->rxa_age = ticks; 864173273Ssam } 865173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 866173273Ssam /* save packet */ 867173273Ssam if (rap->rxa_m[off] == NULL) { 868173273Ssam rap->rxa_m[off] = m; 869173273Ssam rap->rxa_qframes++; 870173273Ssam rap->rxa_qbytes += m->m_pkthdr.len; 871178354Ssam vap->iv_stats.is_ampdu_rx_reorder++; 872173273Ssam } else { 873178354Ssam IEEE80211_DISCARD_MAC(vap, 874173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 875173273Ssam ni->ni_macaddr, "a-mpdu duplicate", 876173273Ssam "seqno %u tid %u BA win <%u:%u>", 877173273Ssam rxseq, tid, rap->rxa_start, 878173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 879178354Ssam vap->iv_stats.is_rx_dup++; 880173273Ssam IEEE80211_NODE_STAT(ni, rx_dup); 881173273Ssam m_freem(m); 882173273Ssam } 883173273Ssam return CONSUMED; 884173273Ssam } 885173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 886173273Ssam /* 887173273Ssam * Outside the BA window, but within range; 888173273Ssam * flush the reorder q and move the window. 889205277Srpaulo * Sec 9.10.7.6.2 b) (p.138) 890173273Ssam */ 891178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 892173273Ssam "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 893170530Ssam rap->rxa_start, 894173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 895170530Ssam rap->rxa_qframes, rxseq, tid); 896178354Ssam vap->iv_stats.is_ampdu_rx_move++; 897170530Ssam 898173273Ssam /* 899173273Ssam * The spec says to flush frames up to but not including: 900173273Ssam * WinStart_B = rxseq - rap->rxa_wnd + 1 901173273Ssam * Then insert the frame or notify the caller to process 902173273Ssam * it immediately. We can safely do this by just starting 903173273Ssam * over again because we know the frame will now be within 904173273Ssam * the BA window. 905173273Ssam */ 906173273Ssam /* NB: rxa_wnd known to be >0 */ 907173273Ssam ampdu_rx_flush_upto(ni, rap, 908173273Ssam IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 909173273Ssam goto again; 910170530Ssam } else { 911170530Ssam /* 912173273Ssam * Outside the BA window and out of range; toss. 913205277Srpaulo * Sec 9.10.7.6.2 c) (p.138) 914170530Ssam */ 915178354Ssam IEEE80211_DISCARD_MAC(vap, 916173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 917178354Ssam "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 918173273Ssam rap->rxa_start, 919173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 920173273Ssam rap->rxa_qframes, rxseq, tid, 921173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 922178354Ssam vap->iv_stats.is_ampdu_rx_drop++; 923173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 924170530Ssam m_freem(m); 925173273Ssam return CONSUMED; 926170530Ssam } 927173273Ssam#undef CONSUMED 928173273Ssam#undef PROCESS 929170530Ssam#undef IEEE80211_FC0_QOSDATA 930170530Ssam} 931170530Ssam 932170530Ssam/* 933170530Ssam * Process a BAR ctl frame. Dispatch all frames up to 934170530Ssam * the sequence number of the frame. If this frame is 935173273Ssam * out of range it's discarded. 936170530Ssam */ 937170530Ssamvoid 938170530Ssamieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 939170530Ssam{ 940178354Ssam struct ieee80211vap *vap = ni->ni_vap; 941170530Ssam struct ieee80211_frame_bar *wh; 942170530Ssam struct ieee80211_rx_ampdu *rap; 943170530Ssam ieee80211_seq rxseq; 944170530Ssam int tid, off; 945170530Ssam 946173273Ssam if (!ieee80211_recv_bar_ena) { 947173273Ssam#if 0 948178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 949173273Ssam ni->ni_macaddr, "BAR", "%s", "processing disabled"); 950173273Ssam#endif 951178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 952173273Ssam return; 953173273Ssam } 954170530Ssam wh = mtod(m0, struct ieee80211_frame_bar *); 955170530Ssam /* XXX check basic BAR */ 956170530Ssam tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 957170530Ssam rap = &ni->ni_rx_ampdu[tid]; 958170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 959170530Ssam /* 960170530Ssam * No ADDBA request yet, don't touch. 961170530Ssam */ 962178354Ssam IEEE80211_DISCARD_MAC(vap, 963170530Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 964170530Ssam ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 965178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 966170530Ssam return; 967170530Ssam } 968178354Ssam vap->iv_stats.is_ampdu_bar_rx++; 969170530Ssam rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 970173273Ssam if (rxseq == rap->rxa_start) 971173273Ssam return; 972170530Ssam /* calculate offset in BA window */ 973170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 974173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 975170530Ssam /* 976173273Ssam * Flush the reorder q up to rxseq and move the window. 977205277Srpaulo * Sec 9.10.7.6.3 a) (p.138) 978170530Ssam */ 979178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 980173273Ssam "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 981170530Ssam rap->rxa_start, 982173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 983173273Ssam rap->rxa_qframes, rxseq, tid); 984178354Ssam vap->iv_stats.is_ampdu_bar_move++; 985173273Ssam 986173273Ssam ampdu_rx_flush_upto(ni, rap, rxseq); 987173273Ssam if (off >= rap->rxa_wnd) { 988173273Ssam /* 989173273Ssam * BAR specifies a window start to the right of BA 990173273Ssam * window; we must move it explicitly since 991173273Ssam * ampdu_rx_flush_upto will not. 992173273Ssam */ 993173273Ssam rap->rxa_start = rxseq; 994170530Ssam } 995173273Ssam } else { 996170530Ssam /* 997173273Ssam * Out of range; toss. 998205277Srpaulo * Sec 9.10.7.6.3 b) (p.138) 999170530Ssam */ 1000178354Ssam IEEE80211_DISCARD_MAC(vap, 1001173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1002173273Ssam "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1003173273Ssam rap->rxa_start, 1004173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1005173273Ssam rap->rxa_qframes, rxseq, tid, 1006173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1007178354Ssam vap->iv_stats.is_ampdu_bar_oow++; 1008173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 1009170530Ssam } 1010170530Ssam} 1011170530Ssam 1012170530Ssam/* 1013170530Ssam * Setup HT-specific state in a node. Called only 1014170530Ssam * when HT use is negotiated so we don't do extra 1015170530Ssam * work for temporary and/or legacy sta's. 1016170530Ssam */ 1017170530Ssamvoid 1018183254Ssamieee80211_ht_node_init(struct ieee80211_node *ni) 1019170530Ssam{ 1020170530Ssam struct ieee80211_tx_ampdu *tap; 1021170530Ssam int ac; 1022170530Ssam 1023173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1024173273Ssam /* 1025173273Ssam * Clean AMPDU state on re-associate. This handles the case 1026173273Ssam * where a station leaves w/o notifying us and then returns 1027173273Ssam * before node is reaped for inactivity. 1028173273Ssam */ 1029173273Ssam ieee80211_ht_node_cleanup(ni); 1030173273Ssam } 1031170530Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 1032170530Ssam tap = &ni->ni_tx_ampdu[ac]; 1033170530Ssam tap->txa_ac = ac; 1034184280Ssam tap->txa_ni = ni; 1035173273Ssam /* NB: further initialization deferred */ 1036170530Ssam } 1037173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1038170530Ssam} 1039170530Ssam 1040170530Ssam/* 1041170530Ssam * Cleanup HT-specific state in a node. Called only 1042170530Ssam * when HT use has been marked. 1043170530Ssam */ 1044170530Ssamvoid 1045170530Ssamieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1046170530Ssam{ 1047191552Ssam struct ieee80211com *ic = ni->ni_ic; 1048170530Ssam int i; 1049170530Ssam 1050170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1051170530Ssam 1052170530Ssam /* XXX optimize this */ 1053170530Ssam for (i = 0; i < WME_NUM_AC; i++) { 1054170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1055184280Ssam if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1056184280Ssam ampdu_tx_stop(tap); 1057170530Ssam } 1058170530Ssam for (i = 0; i < WME_NUM_TID; i++) 1059191552Ssam ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1060170530Ssam 1061170530Ssam ni->ni_htcap = 0; 1062182828Ssam ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1063170530Ssam} 1064170530Ssam 1065178354Ssam/* 1066178354Ssam * Age out HT resources for a station. 1067178354Ssam */ 1068178354Ssamvoid 1069178354Ssamieee80211_ht_node_age(struct ieee80211_node *ni) 1070178354Ssam{ 1071178354Ssam#ifdef IEEE80211_AMPDU_AGE 1072178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1073178354Ssam uint8_t tid; 1074178354Ssam#endif 1075178354Ssam 1076178354Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1077178354Ssam 1078178354Ssam#ifdef IEEE80211_AMPDU_AGE 1079178354Ssam for (tid = 0; tid < WME_NUM_TID; tid++) { 1080178354Ssam struct ieee80211_rx_ampdu *rap; 1081178354Ssam 1082178354Ssam rap = &ni->ni_rx_ampdu[tid]; 1083178354Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1084178354Ssam continue; 1085178354Ssam if (rap->rxa_qframes == 0) 1086178354Ssam continue; 1087178354Ssam /* 1088178354Ssam * Check for frames sitting too long in the reorder queue. 1089178354Ssam * See above for more details on what's happening here. 1090178354Ssam */ 1091178354Ssam /* XXX honor batimeout? */ 1092178354Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1093178354Ssam /* 1094178354Ssam * Too long since we received the first 1095178354Ssam * frame; flush the reorder buffer. 1096178354Ssam */ 1097178354Ssam vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1098178354Ssam ampdu_rx_flush(ni, rap); 1099178354Ssam } 1100178354Ssam } 1101178354Ssam#endif /* IEEE80211_AMPDU_AGE */ 1102178354Ssam} 1103178354Ssam 1104173273Ssamstatic struct ieee80211_channel * 1105173273Ssamfindhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1106173273Ssam{ 1107173273Ssam return ieee80211_find_channel(ic, c->ic_freq, 1108173273Ssam (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1109173273Ssam} 1110173273Ssam 1111173273Ssam/* 1112173273Ssam * Adjust a channel to be HT/non-HT according to the vap's configuration. 1113173273Ssam */ 1114173273Ssamstruct ieee80211_channel * 1115173273Ssamieee80211_ht_adjust_channel(struct ieee80211com *ic, 1116173273Ssam struct ieee80211_channel *chan, int flags) 1117173273Ssam{ 1118173273Ssam struct ieee80211_channel *c; 1119173273Ssam 1120193655Ssam if (flags & IEEE80211_FHT_HT) { 1121173273Ssam /* promote to HT if possible */ 1122193655Ssam if (flags & IEEE80211_FHT_USEHT40) { 1123173273Ssam if (!IEEE80211_IS_CHAN_HT40(chan)) { 1124173273Ssam /* NB: arbitrarily pick ht40+ over ht40- */ 1125173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1126173273Ssam if (c == NULL) 1127173273Ssam c = findhtchan(ic, chan, 1128173273Ssam IEEE80211_CHAN_HT40D); 1129173273Ssam if (c == NULL) 1130173273Ssam c = findhtchan(ic, chan, 1131173273Ssam IEEE80211_CHAN_HT20); 1132173273Ssam if (c != NULL) 1133173273Ssam chan = c; 1134173273Ssam } 1135173273Ssam } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1136173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1137173273Ssam if (c != NULL) 1138173273Ssam chan = c; 1139173273Ssam } 1140173273Ssam } else if (IEEE80211_IS_CHAN_HT(chan)) { 1141173273Ssam /* demote to legacy, HT use is disabled */ 1142173273Ssam c = ieee80211_find_channel(ic, chan->ic_freq, 1143173273Ssam chan->ic_flags &~ IEEE80211_CHAN_HT); 1144173273Ssam if (c != NULL) 1145173273Ssam chan = c; 1146173273Ssam } 1147173273Ssam return chan; 1148173273Ssam} 1149173273Ssam 1150173273Ssam/* 1151173273Ssam * Setup HT-specific state for a legacy WDS peer. 1152173273Ssam */ 1153173273Ssamvoid 1154173273Ssamieee80211_ht_wds_init(struct ieee80211_node *ni) 1155173273Ssam{ 1156178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1157173273Ssam struct ieee80211_tx_ampdu *tap; 1158173273Ssam int ac; 1159173273Ssam 1160193655Ssam KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1161173273Ssam 1162173273Ssam /* XXX check scan cache in case peer has an ap and we have info */ 1163173273Ssam /* 1164173273Ssam * If setup with a legacy channel; locate an HT channel. 1165173273Ssam * Otherwise if the inherited channel (from a companion 1166173273Ssam * AP) is suitable use it so we use the same location 1167173273Ssam * for the extension channel). 1168173273Ssam */ 1169178354Ssam ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1170178354Ssam ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1171173273Ssam 1172173273Ssam ni->ni_htcap = 0; 1173193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1174173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1175173273Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1176173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1177173273Ssam ni->ni_chw = 40; 1178173273Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1179173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1180173273Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1181173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1182193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1183173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1184173273Ssam } else { 1185173273Ssam ni->ni_chw = 20; 1186173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1187173273Ssam } 1188173273Ssam ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1189193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1190183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1191183256Ssam /* XXX does it make sense to enable SMPS? */ 1192173273Ssam 1193173273Ssam ni->ni_htopmode = 0; /* XXX need protection state */ 1194173273Ssam ni->ni_htstbc = 0; /* XXX need info */ 1195173273Ssam 1196173273Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 1197173273Ssam tap = &ni->ni_tx_ampdu[ac]; 1198173273Ssam tap->txa_ac = ac; 1199173273Ssam } 1200193655Ssam /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1201173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1202173273Ssam} 1203173273Ssam 1204173273Ssam/* 1205173273Ssam * Notify hostap vaps of a change in the HTINFO ie. 1206173273Ssam */ 1207173273Ssamstatic void 1208173273Ssamhtinfo_notify(struct ieee80211com *ic) 1209173273Ssam{ 1210178354Ssam struct ieee80211vap *vap; 1211178354Ssam int first = 1; 1212178354Ssam 1213178354Ssam IEEE80211_LOCK_ASSERT(ic); 1214178354Ssam 1215178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1216178354Ssam if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1217178354Ssam continue; 1218183253Ssam if (vap->iv_state != IEEE80211_S_RUN || 1219183253Ssam !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1220183253Ssam continue; 1221178354Ssam if (first) { 1222178354Ssam IEEE80211_NOTE(vap, 1223178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1224178354Ssam vap->iv_bss, 1225178354Ssam "HT bss occupancy change: %d sta, %d ht, " 1226178354Ssam "%d ht40%s, HT protmode now 0x%x" 1227178354Ssam , ic->ic_sta_assoc 1228178354Ssam , ic->ic_ht_sta_assoc 1229178354Ssam , ic->ic_ht40_sta_assoc 1230193655Ssam , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1231178354Ssam ", non-HT sta present" : "" 1232178354Ssam , ic->ic_curhtprotmode); 1233178354Ssam first = 0; 1234178354Ssam } 1235178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1236178354Ssam } 1237173273Ssam} 1238173273Ssam 1239173273Ssam/* 1240173273Ssam * Calculate HT protection mode from current 1241173273Ssam * state and handle updates. 1242173273Ssam */ 1243173273Ssamstatic void 1244173273Ssamhtinfo_update(struct ieee80211com *ic) 1245173273Ssam{ 1246173273Ssam uint8_t protmode; 1247173273Ssam 1248178354Ssam if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1249178354Ssam protmode = IEEE80211_HTINFO_OPMODE_MIXED 1250178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1251193655Ssam } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) { 1252173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1253178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1254178354Ssam } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1255178354Ssam IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1256173273Ssam ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1257173273Ssam protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1258173273Ssam } else { 1259173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PURE; 1260173273Ssam } 1261173273Ssam if (protmode != ic->ic_curhtprotmode) { 1262173273Ssam ic->ic_curhtprotmode = protmode; 1263173273Ssam htinfo_notify(ic); 1264173273Ssam } 1265173273Ssam} 1266173273Ssam 1267173273Ssam/* 1268173273Ssam * Handle an HT station joining a BSS. 1269173273Ssam */ 1270173273Ssamvoid 1271173273Ssamieee80211_ht_node_join(struct ieee80211_node *ni) 1272173273Ssam{ 1273173273Ssam struct ieee80211com *ic = ni->ni_ic; 1274173273Ssam 1275173273Ssam IEEE80211_LOCK_ASSERT(ic); 1276173273Ssam 1277173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1278173273Ssam ic->ic_ht_sta_assoc++; 1279173273Ssam if (ni->ni_chw == 40) 1280173273Ssam ic->ic_ht40_sta_assoc++; 1281173273Ssam } 1282173273Ssam htinfo_update(ic); 1283173273Ssam} 1284173273Ssam 1285173273Ssam/* 1286173273Ssam * Handle an HT station leaving a BSS. 1287173273Ssam */ 1288173273Ssamvoid 1289173273Ssamieee80211_ht_node_leave(struct ieee80211_node *ni) 1290173273Ssam{ 1291173273Ssam struct ieee80211com *ic = ni->ni_ic; 1292173273Ssam 1293173273Ssam IEEE80211_LOCK_ASSERT(ic); 1294173273Ssam 1295173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1296173273Ssam ic->ic_ht_sta_assoc--; 1297173273Ssam if (ni->ni_chw == 40) 1298173273Ssam ic->ic_ht40_sta_assoc--; 1299173273Ssam } 1300173273Ssam htinfo_update(ic); 1301173273Ssam} 1302173273Ssam 1303173273Ssam/* 1304173273Ssam * Public version of htinfo_update; used for processing 1305178354Ssam * beacon frames from overlapping bss. 1306178354Ssam * 1307178354Ssam * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1308178354Ssam * (on receipt of a beacon that advertises MIXED) or 1309178354Ssam * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1310178354Ssam * from an overlapping legacy bss). We treat MIXED with 1311178354Ssam * a higher precedence than PROTOPT (i.e. we will not change 1312178354Ssam * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1313178354Ssam * corresponds to how we handle things in htinfo_update. 1314173273Ssam */ 1315173273Ssamvoid 1316178354Ssamieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1317173273Ssam{ 1318178354Ssam#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1319183246Ssam IEEE80211_LOCK(ic); 1320178354Ssam 1321178354Ssam /* track non-HT station presence */ 1322178354Ssam KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1323183246Ssam ("protmode 0x%x", protmode)); 1324193655Ssam ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR; 1325178354Ssam ic->ic_lastnonht = ticks; 1326178354Ssam 1327183246Ssam if (protmode != ic->ic_curhtprotmode && 1328183246Ssam (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1329183246Ssam OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1330183246Ssam /* push beacon update */ 1331183246Ssam ic->ic_curhtprotmode = protmode; 1332183246Ssam htinfo_notify(ic); 1333183246Ssam } 1334181197Ssam IEEE80211_UNLOCK(ic); 1335178354Ssam#undef OPMODE 1336173273Ssam} 1337173273Ssam 1338173273Ssam/* 1339173273Ssam * Time out presence of an overlapping bss with non-HT 1340173273Ssam * stations. When operating in hostap mode we listen for 1341173273Ssam * beacons from other stations and if we identify a non-HT 1342173273Ssam * station is present we update the opmode field of the 1343173273Ssam * HTINFO ie. To identify when all non-HT stations are 1344173273Ssam * gone we time out this condition. 1345173273Ssam */ 1346173273Ssamvoid 1347173273Ssamieee80211_ht_timeout(struct ieee80211com *ic) 1348173273Ssam{ 1349173273Ssam IEEE80211_LOCK_ASSERT(ic); 1350173273Ssam 1351193655Ssam if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) && 1352173273Ssam time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1353173273Ssam#if 0 1354178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1355173273Ssam "%s", "time out non-HT STA present on channel"); 1356173273Ssam#endif 1357193655Ssam ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1358173273Ssam htinfo_update(ic); 1359173273Ssam } 1360173273Ssam} 1361173273Ssam 1362170530Ssam/* unalligned little endian access */ 1363170530Ssam#define LE_READ_2(p) \ 1364170530Ssam ((uint16_t) \ 1365170530Ssam ((((const uint8_t *)(p))[0] ) | \ 1366170530Ssam (((const uint8_t *)(p))[1] << 8))) 1367170530Ssam 1368170530Ssam/* 1369170530Ssam * Process an 802.11n HT capabilities ie. 1370170530Ssam */ 1371170530Ssamvoid 1372170530Ssamieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1373170530Ssam{ 1374170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1375170530Ssam /* 1376170530Ssam * Station used Vendor OUI ie to associate; 1377170530Ssam * mark the node so when we respond we'll use 1378170530Ssam * the Vendor OUI's and not the standard ie's. 1379170530Ssam */ 1380170530Ssam ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1381170530Ssam ie += 4; 1382170530Ssam } else 1383170530Ssam ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1384170530Ssam 1385170530Ssam ni->ni_htcap = LE_READ_2(ie + 1386170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1387170530Ssam ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1388170530Ssam} 1389170530Ssam 1390183254Ssamstatic void 1391183254Ssamhtinfo_parse(struct ieee80211_node *ni, 1392183254Ssam const struct ieee80211_ie_htinfo *htinfo) 1393170530Ssam{ 1394170530Ssam uint16_t w; 1395170530Ssam 1396170530Ssam ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1397170530Ssam ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1398172055Ssam w = LE_READ_2(&htinfo->hi_byte2); 1399170530Ssam ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1400170530Ssam w = LE_READ_2(&htinfo->hi_byte45); 1401170530Ssam ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1402183254Ssam} 1403183254Ssam 1404183254Ssam/* 1405183254Ssam * Parse an 802.11n HT info ie and save useful information 1406183254Ssam * to the node state. Note this does not effect any state 1407183254Ssam * changes such as for channel width change. 1408183254Ssam */ 1409183254Ssamvoid 1410183254Ssamieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1411183254Ssam{ 1412183254Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1413183254Ssam ie += 4; 1414183254Ssam htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1415183254Ssam} 1416183254Ssam 1417183254Ssam/* 1418183254Ssam * Handle 11n channel switch. Use the received HT ie's to 1419183254Ssam * identify the right channel to use. If we cannot locate it 1420183254Ssam * in the channel table then fallback to legacy operation. 1421183254Ssam * Note that we use this information to identify the node's 1422183254Ssam * channel only; the caller is responsible for insuring any 1423183254Ssam * required channel change is done (e.g. in sta mode when 1424183254Ssam * parsing the contents of a beacon frame). 1425183254Ssam */ 1426183254Ssamstatic void 1427183254Ssamhtinfo_update_chw(struct ieee80211_node *ni, int htflags) 1428183254Ssam{ 1429183254Ssam struct ieee80211com *ic = ni->ni_ic; 1430183254Ssam struct ieee80211_channel *c; 1431183254Ssam int chanflags; 1432183254Ssam 1433173273Ssam chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1434173273Ssam if (chanflags != ni->ni_chan->ic_flags) { 1435183254Ssam /* XXX not right for ht40- */ 1436173273Ssam c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1437178354Ssam if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1438173273Ssam /* 1439173273Ssam * No HT40 channel entry in our table; fall back 1440173273Ssam * to HT20 operation. This should not happen. 1441173273Ssam */ 1442173273Ssam c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1443183254Ssam#if 0 1444183254Ssam IEEE80211_NOTE(ni->ni_vap, 1445173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1446173273Ssam "no HT40 channel (freq %u), falling back to HT20", 1447173273Ssam ni->ni_chan->ic_freq); 1448183254Ssam#endif 1449173273Ssam /* XXX stat */ 1450173273Ssam } 1451173273Ssam if (c != NULL && c != ni->ni_chan) { 1452183254Ssam IEEE80211_NOTE(ni->ni_vap, 1453173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1454173273Ssam "switch station to HT%d channel %u/0x%x", 1455173273Ssam IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1456173273Ssam c->ic_freq, c->ic_flags); 1457173273Ssam ni->ni_chan = c; 1458173273Ssam } 1459173273Ssam /* NB: caller responsible for forcing any channel change */ 1460173273Ssam } 1461173273Ssam /* update node's tx channel width */ 1462173273Ssam ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1463170530Ssam} 1464170530Ssam 1465170530Ssam/* 1466183255Ssam * Update 11n MIMO PS state according to received htcap. 1467183255Ssam */ 1468183255Ssamstatic __inline int 1469183255Ssamhtcap_update_mimo_ps(struct ieee80211_node *ni) 1470183255Ssam{ 1471183255Ssam uint16_t oflags = ni->ni_flags; 1472183255Ssam 1473183255Ssam switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1474183255Ssam case IEEE80211_HTCAP_SMPS_DYNAMIC: 1475183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1476183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1477183255Ssam break; 1478183255Ssam case IEEE80211_HTCAP_SMPS_ENA: 1479183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1480183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1481183255Ssam break; 1482183255Ssam case IEEE80211_HTCAP_SMPS_OFF: 1483183255Ssam default: /* disable on rx of reserved value */ 1484183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1485183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1486183255Ssam break; 1487183255Ssam } 1488183255Ssam return (oflags ^ ni->ni_flags); 1489183255Ssam} 1490183255Ssam 1491183255Ssam/* 1492183257Ssam * Update short GI state according to received htcap 1493183257Ssam * and local settings. 1494183257Ssam */ 1495183257Ssamstatic __inline void 1496183257Ssamhtcap_update_shortgi(struct ieee80211_node *ni) 1497183257Ssam{ 1498183257Ssam struct ieee80211vap *vap = ni->ni_vap; 1499183257Ssam 1500183257Ssam ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1501183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1502193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1503183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI20; 1504183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1505193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1506183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI40; 1507183257Ssam} 1508183257Ssam 1509183257Ssam/* 1510183254Ssam * Parse and update HT-related state extracted from 1511183254Ssam * the HT cap and info ie's. 1512183254Ssam */ 1513183254Ssamvoid 1514183254Ssamieee80211_ht_updateparams(struct ieee80211_node *ni, 1515183254Ssam const uint8_t *htcapie, const uint8_t *htinfoie) 1516183254Ssam{ 1517183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1518183254Ssam const struct ieee80211_ie_htinfo *htinfo; 1519183254Ssam int htflags; 1520183254Ssam 1521183254Ssam ieee80211_parse_htcap(ni, htcapie); 1522183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1523183255Ssam htcap_update_mimo_ps(ni); 1524183257Ssam htcap_update_shortgi(ni); 1525183254Ssam 1526183254Ssam if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1527183254Ssam htinfoie += 4; 1528183254Ssam htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1529183254Ssam htinfo_parse(ni, htinfo); 1530183254Ssam 1531193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1532183254Ssam IEEE80211_CHAN_HT20 : 0; 1533183254Ssam /* NB: honor operating mode constraint */ 1534183254Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1535193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1536183254Ssam if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1537183254Ssam htflags = IEEE80211_CHAN_HT40U; 1538183254Ssam else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1539183254Ssam htflags = IEEE80211_CHAN_HT40D; 1540183254Ssam } 1541183254Ssam htinfo_update_chw(ni, htflags); 1542183256Ssam 1543183256Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1544193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1545183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1546183256Ssam else 1547183256Ssam ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1548183254Ssam} 1549183254Ssam 1550183254Ssam/* 1551183254Ssam * Parse and update HT-related state extracted from the HT cap ie 1552183254Ssam * for a station joining an HT BSS. 1553183254Ssam */ 1554183254Ssamvoid 1555183254Ssamieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1556183254Ssam{ 1557183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1558183254Ssam int htflags; 1559183254Ssam 1560183254Ssam ieee80211_parse_htcap(ni, htcapie); 1561183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1562183255Ssam htcap_update_mimo_ps(ni); 1563183257Ssam htcap_update_shortgi(ni); 1564183254Ssam 1565183254Ssam /* NB: honor operating mode constraint */ 1566183254Ssam /* XXX 40 MHZ intolerant */ 1567193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1568183254Ssam IEEE80211_CHAN_HT20 : 0; 1569183254Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1570193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1571183254Ssam if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1572183254Ssam htflags = IEEE80211_CHAN_HT40U; 1573183254Ssam else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1574183254Ssam htflags = IEEE80211_CHAN_HT40D; 1575183254Ssam } 1576183254Ssam htinfo_update_chw(ni, htflags); 1577183254Ssam} 1578183254Ssam 1579183254Ssam/* 1580170530Ssam * Install received HT rate set by parsing the HT cap ie. 1581170530Ssam */ 1582170530Ssamint 1583170530Ssamieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1584170530Ssam{ 1585219602Sbschmidt struct ieee80211com *ic = ni->ni_ic; 1586178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1587170530Ssam const struct ieee80211_ie_htcap *htcap; 1588170530Ssam struct ieee80211_htrateset *rs; 1589219602Sbschmidt int i, maxequalmcs, maxunequalmcs; 1590170530Ssam 1591219602Sbschmidt maxequalmcs = ic->ic_txstream * 8 - 1; 1592219602Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 1593219602Sbschmidt if (ic->ic_txstream >= 2) 1594219602Sbschmidt maxunequalmcs = 38; 1595219602Sbschmidt if (ic->ic_txstream >= 3) 1596219602Sbschmidt maxunequalmcs = 52; 1597219602Sbschmidt if (ic->ic_txstream >= 4) 1598219602Sbschmidt maxunequalmcs = 76; 1599219602Sbschmidt } else 1600219602Sbschmidt maxunequalmcs = 0; 1601219602Sbschmidt 1602170530Ssam rs = &ni->ni_htrates; 1603170530Ssam memset(rs, 0, sizeof(*rs)); 1604170530Ssam if (ie != NULL) { 1605170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1606170530Ssam ie += 4; 1607170530Ssam htcap = (const struct ieee80211_ie_htcap *) ie; 1608170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1609170530Ssam if (isclr(htcap->hc_mcsset, i)) 1610170530Ssam continue; 1611170530Ssam if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1612178354Ssam IEEE80211_NOTE(vap, 1613170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1614170530Ssam "WARNING, HT rate set too large; only " 1615170530Ssam "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1616178354Ssam vap->iv_stats.is_rx_rstoobig++; 1617170530Ssam break; 1618170530Ssam } 1619219602Sbschmidt if (i <= 31 && i > maxequalmcs) 1620219602Sbschmidt continue; 1621219602Sbschmidt if (i == 32 && 1622219602Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 1623219602Sbschmidt continue; 1624219602Sbschmidt if (i > 32 && i > maxunequalmcs) 1625219602Sbschmidt continue; 1626170530Ssam rs->rs_rates[rs->rs_nrates++] = i; 1627170530Ssam } 1628170530Ssam } 1629170530Ssam return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1630170530Ssam} 1631170530Ssam 1632170530Ssam/* 1633170530Ssam * Mark rates in a node's HT rate set as basic according 1634170530Ssam * to the information in the supplied HT info ie. 1635170530Ssam */ 1636170530Ssamvoid 1637170530Ssamieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1638170530Ssam{ 1639170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1640170530Ssam struct ieee80211_htrateset *rs; 1641170530Ssam int i, j; 1642170530Ssam 1643170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1644170530Ssam ie += 4; 1645170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1646170530Ssam rs = &ni->ni_htrates; 1647170530Ssam if (rs->rs_nrates == 0) { 1648178354Ssam IEEE80211_NOTE(ni->ni_vap, 1649170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1650170530Ssam "%s", "WARNING, empty HT rate set"); 1651170530Ssam return; 1652170530Ssam } 1653170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1654170530Ssam if (isclr(htinfo->hi_basicmcsset, i)) 1655170530Ssam continue; 1656170530Ssam for (j = 0; j < rs->rs_nrates; j++) 1657170530Ssam if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1658170530Ssam rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1659170530Ssam } 1660170530Ssam} 1661170530Ssam 1662170530Ssamstatic void 1663184280Ssamampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 1664184280Ssam{ 1665184280Ssam callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1666184280Ssam tap->txa_flags |= IEEE80211_AGGR_SETUP; 1667184280Ssam} 1668184280Ssam 1669184280Ssamstatic void 1670184280Ssamampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 1671184280Ssam{ 1672184280Ssam struct ieee80211_node *ni = tap->txa_ni; 1673184280Ssam struct ieee80211com *ic = ni->ni_ic; 1674184280Ssam 1675184280Ssam KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 1676184280Ssam ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac)); 1677184280Ssam 1678184280Ssam /* 1679184280Ssam * Stop BA stream if setup so driver has a chance 1680184280Ssam * to reclaim any resources it might have allocated. 1681184280Ssam */ 1682184280Ssam ic->ic_addba_stop(ni, tap); 1683184280Ssam /* 1684184280Ssam * Stop any pending BAR transmit. 1685184280Ssam */ 1686184280Ssam bar_stop_timer(tap); 1687184280Ssam 1688184280Ssam tap->txa_lastsample = 0; 1689184280Ssam tap->txa_avgpps = 0; 1690184280Ssam /* NB: clearing NAK means we may re-send ADDBA */ 1691184280Ssam tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 1692184280Ssam} 1693184280Ssam 1694184280Ssamstatic void 1695170530Ssamaddba_timeout(void *arg) 1696170530Ssam{ 1697170530Ssam struct ieee80211_tx_ampdu *tap = arg; 1698170530Ssam 1699170530Ssam /* XXX ? */ 1700170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1701170530Ssam tap->txa_attempts++; 1702170530Ssam} 1703170530Ssam 1704170530Ssamstatic void 1705170530Ssamaddba_start_timeout(struct ieee80211_tx_ampdu *tap) 1706170530Ssam{ 1707170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1708178354Ssam callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1709170530Ssam addba_timeout, tap); 1710170530Ssam tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1711178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1712170530Ssam} 1713170530Ssam 1714170530Ssamstatic void 1715170530Ssamaddba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1716170530Ssam{ 1717170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1718170530Ssam if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1719170530Ssam callout_stop(&tap->txa_timer); 1720170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1721170530Ssam } 1722170530Ssam} 1723170530Ssam 1724170530Ssam/* 1725170530Ssam * Default method for requesting A-MPDU tx aggregation. 1726170530Ssam * We setup the specified state block and start a timer 1727170530Ssam * to wait for an ADDBA response frame. 1728170530Ssam */ 1729170530Ssamstatic int 1730170530Ssamieee80211_addba_request(struct ieee80211_node *ni, 1731170530Ssam struct ieee80211_tx_ampdu *tap, 1732170530Ssam int dialogtoken, int baparamset, int batimeout) 1733170530Ssam{ 1734170530Ssam int bufsiz; 1735170530Ssam 1736170530Ssam /* XXX locking */ 1737170530Ssam tap->txa_token = dialogtoken; 1738170530Ssam tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1739170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1740170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1741170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1742170530Ssam addba_start_timeout(tap); 1743170530Ssam return 1; 1744170530Ssam} 1745170530Ssam 1746170530Ssam/* 1747170530Ssam * Default method for processing an A-MPDU tx aggregation 1748170530Ssam * response. We shutdown any pending timer and update the 1749170530Ssam * state block according to the reply. 1750170530Ssam */ 1751170530Ssamstatic int 1752170530Ssamieee80211_addba_response(struct ieee80211_node *ni, 1753170530Ssam struct ieee80211_tx_ampdu *tap, 1754170530Ssam int status, int baparamset, int batimeout) 1755170530Ssam{ 1756184280Ssam int bufsiz, tid; 1757170530Ssam 1758170530Ssam /* XXX locking */ 1759170530Ssam addba_stop_timeout(tap); 1760170530Ssam if (status == IEEE80211_STATUS_SUCCESS) { 1761170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1762170530Ssam /* XXX override our request? */ 1763170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1764170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1765184280Ssam /* XXX AC/TID */ 1766184280Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1767170530Ssam tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1768184280Ssam tap->txa_attempts = 0; 1769173273Ssam } else { 1770173273Ssam /* mark tid so we don't try again */ 1771173273Ssam tap->txa_flags |= IEEE80211_AGGR_NAK; 1772170530Ssam } 1773170530Ssam return 1; 1774170530Ssam} 1775170530Ssam 1776170530Ssam/* 1777170530Ssam * Default method for stopping A-MPDU tx aggregation. 1778170530Ssam * Any timer is cleared and we drain any pending frames. 1779170530Ssam */ 1780170530Ssamstatic void 1781170530Ssamieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1782170530Ssam{ 1783170530Ssam /* XXX locking */ 1784170530Ssam addba_stop_timeout(tap); 1785170530Ssam if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1786182830Ssam /* XXX clear aggregation queue */ 1787170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1788170530Ssam } 1789170530Ssam tap->txa_attempts = 0; 1790170530Ssam} 1791170530Ssam 1792170530Ssam/* 1793170530Ssam * Process a received action frame using the default aggregation 1794170530Ssam * policy. We intercept ADDBA-related frames and use them to 1795170530Ssam * update our aggregation state. All other frames are passed up 1796170530Ssam * for processing by ieee80211_recv_action. 1797170530Ssam */ 1798195377Ssamstatic int 1799195377Ssamht_recv_action_ba_addba_request(struct ieee80211_node *ni, 1800195377Ssam const struct ieee80211_frame *wh, 1801170530Ssam const uint8_t *frm, const uint8_t *efrm) 1802170530Ssam{ 1803170530Ssam struct ieee80211com *ic = ni->ni_ic; 1804178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1805170530Ssam struct ieee80211_rx_ampdu *rap; 1806195377Ssam uint8_t dialogtoken; 1807195377Ssam uint16_t baparamset, batimeout, baseqctl; 1808205277Srpaulo uint16_t args[5]; 1809195377Ssam int tid; 1810170530Ssam 1811195377Ssam dialogtoken = frm[2]; 1812195377Ssam baparamset = LE_READ_2(frm+3); 1813195377Ssam batimeout = LE_READ_2(frm+5); 1814195377Ssam baseqctl = LE_READ_2(frm+7); 1815170530Ssam 1816195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1817170530Ssam 1818195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1819195377Ssam "recv ADDBA request: dialogtoken %u baparamset 0x%x " 1820195377Ssam "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d", 1821195377Ssam dialogtoken, baparamset, 1822195377Ssam tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ), 1823195377Ssam batimeout, 1824195377Ssam MS(baseqctl, IEEE80211_BASEQ_START), 1825195377Ssam MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1826170530Ssam 1827195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1828170530Ssam 1829195377Ssam /* Send ADDBA response */ 1830195377Ssam args[0] = dialogtoken; 1831195377Ssam /* 1832195377Ssam * NB: We ack only if the sta associated with HT and 1833195377Ssam * the ap is configured to do AMPDU rx (the latter 1834195377Ssam * violates the 11n spec and is mostly for testing). 1835195377Ssam */ 1836195377Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1837195377Ssam (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 1838195377Ssam /* XXX handle ampdu_rx_start failure */ 1839195377Ssam ic->ic_ampdu_rx_start(ni, rap, 1840195377Ssam baparamset, batimeout, baseqctl); 1841170530Ssam 1842195377Ssam args[1] = IEEE80211_STATUS_SUCCESS; 1843195377Ssam } else { 1844195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1845195377Ssam ni, "reject ADDBA request: %s", 1846195377Ssam ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1847195377Ssam "administratively disabled" : 1848195377Ssam "not negotiated for station"); 1849195377Ssam vap->iv_stats.is_addba_reject++; 1850195377Ssam args[1] = IEEE80211_STATUS_UNSPECIFIED; 1851195377Ssam } 1852195377Ssam /* XXX honor rap flags? */ 1853195377Ssam args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1854195377Ssam | SM(tid, IEEE80211_BAPS_TID) 1855195377Ssam | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1856195377Ssam ; 1857195377Ssam args[3] = 0; 1858205277Srpaulo args[4] = 0; 1859195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1860195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1861195377Ssam return 0; 1862195377Ssam} 1863170530Ssam 1864195377Ssamstatic int 1865195377Ssamht_recv_action_ba_addba_response(struct ieee80211_node *ni, 1866195377Ssam const struct ieee80211_frame *wh, 1867195377Ssam const uint8_t *frm, const uint8_t *efrm) 1868195377Ssam{ 1869195377Ssam struct ieee80211com *ic = ni->ni_ic; 1870195377Ssam struct ieee80211vap *vap = ni->ni_vap; 1871195377Ssam struct ieee80211_tx_ampdu *tap; 1872195377Ssam uint8_t dialogtoken, policy; 1873195377Ssam uint16_t baparamset, batimeout, code; 1874195377Ssam int tid, ac, bufsiz; 1875170530Ssam 1876195377Ssam dialogtoken = frm[2]; 1877195377Ssam code = LE_READ_2(frm+3); 1878195377Ssam baparamset = LE_READ_2(frm+5); 1879195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1880195377Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1881195377Ssam policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1882195377Ssam batimeout = LE_READ_2(frm+7); 1883195377Ssam 1884195377Ssam ac = TID_TO_WME_AC(tid); 1885195377Ssam tap = &ni->ni_tx_ampdu[ac]; 1886195377Ssam if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1887195377Ssam IEEE80211_DISCARD_MAC(vap, 1888195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1889195377Ssam ni->ni_macaddr, "ADDBA response", 1890195377Ssam "no pending ADDBA, tid %d dialogtoken %u " 1891195377Ssam "code %d", tid, dialogtoken, code); 1892195377Ssam vap->iv_stats.is_addba_norequest++; 1893195377Ssam return 0; 1894195377Ssam } 1895195377Ssam if (dialogtoken != tap->txa_token) { 1896195377Ssam IEEE80211_DISCARD_MAC(vap, 1897195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1898195377Ssam ni->ni_macaddr, "ADDBA response", 1899195377Ssam "dialogtoken mismatch: waiting for %d, " 1900195377Ssam "received %d, tid %d code %d", 1901195377Ssam tap->txa_token, dialogtoken, tid, code); 1902195377Ssam vap->iv_stats.is_addba_badtoken++; 1903195377Ssam return 0; 1904195377Ssam } 1905195377Ssam /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1906195377Ssam if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1907195377Ssam IEEE80211_DISCARD_MAC(vap, 1908195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1909195377Ssam ni->ni_macaddr, "ADDBA response", 1910195377Ssam "policy mismatch: expecting %s, " 1911195377Ssam "received %s, tid %d code %d", 1912195377Ssam tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1913195377Ssam policy, tid, code); 1914195377Ssam vap->iv_stats.is_addba_badpolicy++; 1915195377Ssam return 0; 1916195377Ssam } 1917182829Ssam#if 0 1918195377Ssam /* XXX we take MIN in ieee80211_addba_response */ 1919195377Ssam if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1920195377Ssam IEEE80211_DISCARD_MAC(vap, 1921195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1922195377Ssam ni->ni_macaddr, "ADDBA response", 1923195377Ssam "BA window too large: max %d, " 1924195377Ssam "received %d, tid %d code %d", 1925195377Ssam bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1926195377Ssam vap->iv_stats.is_addba_badbawinsize++; 1927195377Ssam return 0; 1928195377Ssam } 1929182829Ssam#endif 1930195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1931195377Ssam "recv ADDBA response: dialogtoken %u code %d " 1932195377Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1933195377Ssam dialogtoken, code, baparamset, tid, bufsiz, 1934195377Ssam batimeout); 1935195377Ssam ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 1936195377Ssam return 0; 1937195377Ssam} 1938170530Ssam 1939195377Ssamstatic int 1940195377Ssamht_recv_action_ba_delba(struct ieee80211_node *ni, 1941195377Ssam const struct ieee80211_frame *wh, 1942195377Ssam const uint8_t *frm, const uint8_t *efrm) 1943195377Ssam{ 1944195377Ssam struct ieee80211com *ic = ni->ni_ic; 1945195377Ssam struct ieee80211_rx_ampdu *rap; 1946195377Ssam struct ieee80211_tx_ampdu *tap; 1947195377Ssam uint16_t baparamset, code; 1948195377Ssam int tid, ac; 1949170530Ssam 1950195377Ssam baparamset = LE_READ_2(frm+2); 1951195377Ssam code = LE_READ_2(frm+4); 1952170530Ssam 1953195377Ssam tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1954170530Ssam 1955195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1956195377Ssam "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1957195377Ssam "code %d", baparamset, tid, 1958195377Ssam MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1959195377Ssam 1960195377Ssam if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1961195377Ssam ac = TID_TO_WME_AC(tid); 1962195377Ssam tap = &ni->ni_tx_ampdu[ac]; 1963195377Ssam ic->ic_addba_stop(ni, tap); 1964195377Ssam } else { 1965195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1966195377Ssam ic->ic_ampdu_rx_stop(ni, rap); 1967170530Ssam } 1968195377Ssam return 0; 1969170530Ssam} 1970170530Ssam 1971195377Ssamstatic int 1972195377Ssamht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 1973195377Ssam const struct ieee80211_frame *wh, 1974170530Ssam const uint8_t *frm, const uint8_t *efrm) 1975170530Ssam{ 1976170530Ssam int chw; 1977170530Ssam 1978195377Ssam chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 1979195377Ssam 1980195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1981195377Ssam "%s: HT txchwidth, width %d%s", 1982195377Ssam __func__, chw, ni->ni_chw != chw ? "*" : ""); 1983195377Ssam if (chw != ni->ni_chw) { 1984195377Ssam ni->ni_chw = chw; 1985195377Ssam /* XXX notify on change */ 1986170530Ssam } 1987195377Ssam return 0; 1988170530Ssam} 1989170530Ssam 1990195377Ssamstatic int 1991195377Ssamht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 1992195377Ssam const struct ieee80211_frame *wh, 1993195377Ssam const uint8_t *frm, const uint8_t *efrm) 1994195377Ssam{ 1995195377Ssam const struct ieee80211_action_ht_mimopowersave *mps = 1996195377Ssam (const struct ieee80211_action_ht_mimopowersave *) frm; 1997195377Ssam 1998195377Ssam /* XXX check iv_htcaps */ 1999195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2000195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2001195377Ssam else 2002195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2003195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2004195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2005195377Ssam else 2006195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2007195377Ssam /* XXX notify on change */ 2008195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2009195377Ssam "%s: HT MIMO PS (%s%s)", __func__, 2010195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2011195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2012195377Ssam ); 2013195377Ssam return 0; 2014195377Ssam} 2015195377Ssam 2016170530Ssam/* 2017170530Ssam * Transmit processing. 2018170530Ssam */ 2019170530Ssam 2020170530Ssam/* 2021178354Ssam * Check if A-MPDU should be requested/enabled for a stream. 2022178354Ssam * We require a traffic rate above a per-AC threshold and we 2023178354Ssam * also handle backoff from previous failed attempts. 2024178354Ssam * 2025178354Ssam * Drivers may override this method to bring in information 2026178354Ssam * such as link state conditions in making the decision. 2027178354Ssam */ 2028178354Ssamstatic int 2029178354Ssamieee80211_ampdu_enable(struct ieee80211_node *ni, 2030178354Ssam struct ieee80211_tx_ampdu *tap) 2031178354Ssam{ 2032178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2033178354Ssam 2034178354Ssam if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) 2035178354Ssam return 0; 2036178354Ssam /* XXX check rssi? */ 2037178354Ssam if (tap->txa_attempts >= ieee80211_addba_maxtries && 2038178354Ssam ticks < tap->txa_nextrequest) { 2039178354Ssam /* 2040178354Ssam * Don't retry too often; txa_nextrequest is set 2041178354Ssam * to the minimum interval we'll retry after 2042178354Ssam * ieee80211_addba_maxtries failed attempts are made. 2043178354Ssam */ 2044178354Ssam return 0; 2045178354Ssam } 2046178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2047183249Ssam "enable AMPDU on %s, avgpps %d pkts %d", 2048183249Ssam ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts); 2049178354Ssam return 1; 2050178354Ssam} 2051178354Ssam 2052178354Ssam/* 2053170530Ssam * Request A-MPDU tx aggregation. Setup local state and 2054170530Ssam * issue an ADDBA request. BA use will only happen after 2055170530Ssam * the other end replies with ADDBA response. 2056170530Ssam */ 2057170530Ssamint 2058170530Ssamieee80211_ampdu_request(struct ieee80211_node *ni, 2059170530Ssam struct ieee80211_tx_ampdu *tap) 2060170530Ssam{ 2061170530Ssam struct ieee80211com *ic = ni->ni_ic; 2062205277Srpaulo uint16_t args[5]; 2063170530Ssam int tid, dialogtoken; 2064170530Ssam static int tokens = 0; /* XXX */ 2065170530Ssam 2066170530Ssam /* XXX locking */ 2067170530Ssam if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2068170530Ssam /* do deferred setup of state */ 2069184280Ssam ampdu_tx_setup(tap); 2070170530Ssam } 2071173273Ssam /* XXX hack for not doing proper locking */ 2072173273Ssam tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2073173273Ssam 2074170530Ssam dialogtoken = (tokens+1) % 63; /* XXX */ 2075183245Ssam tid = WME_AC_TO_TID(tap->txa_ac); 2076183245Ssam tap->txa_start = ni->ni_txseqs[tid]; 2077170530Ssam 2078170530Ssam args[0] = dialogtoken; 2079205277Srpaulo args[1] = 0; /* NB: status code not used */ 2080205277Srpaulo args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2081170530Ssam | SM(tid, IEEE80211_BAPS_TID) 2082170530Ssam | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 2083170530Ssam ; 2084205277Srpaulo args[3] = 0; /* batimeout */ 2085170530Ssam /* NB: do first so there's no race against reply */ 2086205277Srpaulo if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2087170530Ssam /* unable to setup state, don't make request */ 2088178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2089173273Ssam ni, "%s: could not setup BA stream for AC %d", 2090173273Ssam __func__, tap->txa_ac); 2091173273Ssam /* defer next try so we don't slam the driver with requests */ 2092178354Ssam tap->txa_attempts = ieee80211_addba_maxtries; 2093178354Ssam /* NB: check in case driver wants to override */ 2094178354Ssam if (tap->txa_nextrequest <= ticks) 2095178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2096170530Ssam return 0; 2097170530Ssam } 2098170530Ssam tokens = dialogtoken; /* allocate token */ 2099183245Ssam /* NB: after calling ic_addba_request so driver can set txa_start */ 2100205277Srpaulo args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START) 2101178953Ssam | SM(0, IEEE80211_BASEQ_FRAG) 2102178953Ssam ; 2103170530Ssam return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2104170530Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2105170530Ssam} 2106170530Ssam 2107170530Ssam/* 2108173273Ssam * Terminate an AMPDU tx stream. State is reclaimed 2109173273Ssam * and the peer notified with a DelBA Action frame. 2110173273Ssam */ 2111173273Ssamvoid 2112183250Ssamieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2113183250Ssam int reason) 2114173273Ssam{ 2115173273Ssam struct ieee80211com *ic = ni->ni_ic; 2116178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2117173273Ssam uint16_t args[4]; 2118173273Ssam 2119173273Ssam /* XXX locking */ 2120184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2121173273Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 2122178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2123183250Ssam ni, "%s: stop BA stream for AC %d (reason %d)", 2124183250Ssam __func__, tap->txa_ac, reason); 2125178354Ssam vap->iv_stats.is_ampdu_stop++; 2126173273Ssam 2127173273Ssam ic->ic_addba_stop(ni, tap); 2128173273Ssam args[0] = WME_AC_TO_TID(tap->txa_ac); 2129173273Ssam args[1] = IEEE80211_DELBAPS_INIT; 2130183250Ssam args[2] = reason; /* XXX reason code */ 2131195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2132173273Ssam IEEE80211_ACTION_BA_DELBA, args); 2133173273Ssam } else { 2134178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2135183250Ssam ni, "%s: BA stream for AC %d not running (reason %d)", 2136183250Ssam __func__, tap->txa_ac, reason); 2137178354Ssam vap->iv_stats.is_ampdu_stop_failed++; 2138173273Ssam } 2139173273Ssam} 2140173273Ssam 2141184280Ssamstatic void 2142184280Ssambar_timeout(void *arg) 2143184280Ssam{ 2144184280Ssam struct ieee80211_tx_ampdu *tap = arg; 2145184280Ssam struct ieee80211_node *ni = tap->txa_ni; 2146184280Ssam 2147184280Ssam KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2148184280Ssam ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2149184280Ssam 2150184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2151184280Ssam ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2152184280Ssam tap->txa_ac, tap->txa_flags, tap->txa_attempts); 2153184280Ssam 2154184280Ssam /* guard against race with bar_tx_complete */ 2155184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2156184280Ssam return; 2157184280Ssam /* XXX ? */ 2158184280Ssam if (tap->txa_attempts >= ieee80211_bar_maxtries) 2159184280Ssam ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2160184280Ssam else 2161184280Ssam ieee80211_send_bar(ni, tap, tap->txa_seqpending); 2162184280Ssam} 2163184280Ssam 2164184280Ssamstatic void 2165184280Ssambar_start_timer(struct ieee80211_tx_ampdu *tap) 2166184280Ssam{ 2167184280Ssam callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2168184280Ssam} 2169184280Ssam 2170184280Ssamstatic void 2171184280Ssambar_stop_timer(struct ieee80211_tx_ampdu *tap) 2172184280Ssam{ 2173184280Ssam callout_stop(&tap->txa_timer); 2174184280Ssam} 2175184280Ssam 2176184280Ssamstatic void 2177184280Ssambar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2178184280Ssam{ 2179184280Ssam struct ieee80211_tx_ampdu *tap = arg; 2180184280Ssam 2181184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2182184280Ssam ni, "%s: tid %u flags 0x%x pending %d status %d", 2183184280Ssam __func__, tap->txa_ac, tap->txa_flags, 2184184280Ssam callout_pending(&tap->txa_timer), status); 2185184280Ssam 2186184280Ssam /* XXX locking */ 2187184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2188184280Ssam callout_pending(&tap->txa_timer)) { 2189184280Ssam struct ieee80211com *ic = ni->ni_ic; 2190184280Ssam 2191184280Ssam if (status) /* ACK'd */ 2192184280Ssam bar_stop_timer(tap); 2193184280Ssam ic->ic_bar_response(ni, tap, status); 2194184280Ssam /* NB: just let timer expire so we pace requests */ 2195184280Ssam } 2196184280Ssam} 2197184280Ssam 2198184280Ssamstatic void 2199184280Ssamieee80211_bar_response(struct ieee80211_node *ni, 2200184280Ssam struct ieee80211_tx_ampdu *tap, int status) 2201184280Ssam{ 2202184280Ssam 2203184280Ssam if (status != 0) { /* got ACK */ 2204184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2205184280Ssam ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2206184280Ssam tap->txa_start, 2207184280Ssam IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2208184280Ssam tap->txa_qframes, tap->txa_seqpending, 2209184280Ssam WME_AC_TO_TID(tap->txa_ac)); 2210184280Ssam 2211184280Ssam /* NB: timer already stopped in bar_tx_complete */ 2212184280Ssam tap->txa_start = tap->txa_seqpending; 2213184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2214184280Ssam } 2215184280Ssam} 2216184280Ssam 2217173273Ssam/* 2218170530Ssam * Transmit a BAR frame to the specified node. The 2219170530Ssam * BAR contents are drawn from the supplied aggregation 2220170530Ssam * state associated with the node. 2221184280Ssam * 2222184280Ssam * NB: we only handle immediate ACK w/ compressed bitmap. 2223170530Ssam */ 2224170530Ssamint 2225170530Ssamieee80211_send_bar(struct ieee80211_node *ni, 2226184280Ssam struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2227170530Ssam{ 2228178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2229178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2230170530Ssam struct ieee80211com *ic = ni->ni_ic; 2231184280Ssam struct ieee80211_frame_bar *bar; 2232170530Ssam struct mbuf *m; 2233184280Ssam uint16_t barctl, barseqctl; 2234170530Ssam uint8_t *frm; 2235170530Ssam int tid, ret; 2236170530Ssam 2237184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2238184280Ssam /* no ADDBA response, should not happen */ 2239184280Ssam /* XXX stat+msg */ 2240184280Ssam return EINVAL; 2241184280Ssam } 2242184280Ssam /* XXX locking */ 2243184280Ssam bar_stop_timer(tap); 2244184280Ssam 2245170530Ssam ieee80211_ref_node(ni); 2246170530Ssam 2247184280Ssam m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2248170530Ssam if (m == NULL) 2249170530Ssam senderr(ENOMEM, is_tx_nobuf); 2250170530Ssam 2251184280Ssam if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2252184280Ssam m_freem(m); 2253184280Ssam senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2254184280Ssam /* NOTREACHED */ 2255184280Ssam } 2256184280Ssam 2257184280Ssam bar = mtod(m, struct ieee80211_frame_bar *); 2258184280Ssam bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2259170530Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2260184280Ssam bar->i_fc[1] = 0; 2261184280Ssam IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2262184280Ssam IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2263170530Ssam 2264170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 2265170530Ssam barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2266184280Ssam 0 : IEEE80211_BAR_NOACK) 2267184280Ssam | IEEE80211_BAR_COMP 2268184280Ssam | SM(tid, IEEE80211_BAR_TID) 2269170530Ssam ; 2270184280Ssam barseqctl = SM(seq, IEEE80211_BAR_SEQ_START); 2271184280Ssam /* NB: known to have proper alignment */ 2272184280Ssam bar->i_ctl = htole16(barctl); 2273184280Ssam bar->i_seq = htole16(barseqctl); 2274184280Ssam m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2275170530Ssam 2276178354Ssam M_WME_SETAC(m, WME_AC_VO); 2277178354Ssam 2278170530Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2279170530Ssam 2280184280Ssam /* XXX locking */ 2281184280Ssam /* init/bump attempts counter */ 2282184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2283184280Ssam tap->txa_attempts = 1; 2284184280Ssam else 2285184280Ssam tap->txa_attempts++; 2286184280Ssam tap->txa_seqpending = seq; 2287184280Ssam tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2288170530Ssam 2289184280Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2290184280Ssam ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2291184280Ssam tid, barctl, seq, tap->txa_attempts); 2292184280Ssam 2293184280Ssam ret = ic->ic_raw_xmit(ni, m, NULL); 2294184280Ssam if (ret != 0) { 2295184280Ssam /* xmit failed, clear state flag */ 2296184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2297184280Ssam goto bad; 2298184280Ssam } 2299184280Ssam /* XXX hack against tx complete happening before timer is started */ 2300184280Ssam if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2301184280Ssam bar_start_timer(tap); 2302184280Ssam return 0; 2303170530Ssambad: 2304170530Ssam ieee80211_free_node(ni); 2305170530Ssam return ret; 2306170530Ssam#undef senderr 2307170530Ssam} 2308170530Ssam 2309195377Ssamstatic int 2310195377Ssamht_action_output(struct ieee80211_node *ni, struct mbuf *m) 2311195377Ssam{ 2312195377Ssam struct ieee80211_bpf_params params; 2313195377Ssam 2314195377Ssam memset(¶ms, 0, sizeof(params)); 2315195377Ssam params.ibp_pri = WME_AC_VO; 2316195377Ssam params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2317195377Ssam /* NB: we know all frames are unicast */ 2318195377Ssam params.ibp_try0 = ni->ni_txparms->maxretry; 2319195377Ssam params.ibp_power = ni->ni_txpower; 2320195377Ssam return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2321195377Ssam ¶ms); 2322195377Ssam} 2323195377Ssam 2324195377Ssam#define ADDSHORT(frm, v) do { \ 2325195377Ssam frm[0] = (v) & 0xff; \ 2326195377Ssam frm[1] = (v) >> 8; \ 2327195377Ssam frm += 2; \ 2328195377Ssam} while (0) 2329195377Ssam 2330170530Ssam/* 2331170530Ssam * Send an action management frame. The arguments are stuff 2332170530Ssam * into a frame without inspection; the caller is assumed to 2333170530Ssam * prepare them carefully (e.g. based on the aggregation state). 2334170530Ssam */ 2335195377Ssamstatic int 2336195377Ssamht_send_action_ba_addba(struct ieee80211_node *ni, 2337195377Ssam int category, int action, void *arg0) 2338170530Ssam{ 2339178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2340170530Ssam struct ieee80211com *ic = ni->ni_ic; 2341195377Ssam uint16_t *args = arg0; 2342170530Ssam struct mbuf *m; 2343170530Ssam uint8_t *frm; 2344195377Ssam 2345195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2346205277Srpaulo "send ADDBA %s: dialogtoken %d status %d " 2347195377Ssam "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 2348195377Ssam (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 2349195377Ssam "request" : "response", 2350205277Srpaulo args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), 2351205277Srpaulo args[3], args[4]); 2352195377Ssam 2353195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2354195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2355195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2356195377Ssam ieee80211_ref_node(ni); 2357195377Ssam 2358195377Ssam m = ieee80211_getmgtframe(&frm, 2359195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2360195377Ssam sizeof(uint16_t) /* action+category */ 2361195377Ssam /* XXX may action payload */ 2362195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2363195377Ssam ); 2364195377Ssam if (m != NULL) { 2365195377Ssam *frm++ = category; 2366195377Ssam *frm++ = action; 2367195377Ssam *frm++ = args[0]; /* dialog token */ 2368205277Srpaulo if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 2369205277Srpaulo ADDSHORT(frm, args[1]); /* status code */ 2370205277Srpaulo ADDSHORT(frm, args[2]); /* baparamset */ 2371205277Srpaulo ADDSHORT(frm, args[3]); /* batimeout */ 2372195377Ssam if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 2373205277Srpaulo ADDSHORT(frm, args[4]); /* baseqctl */ 2374195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2375195377Ssam return ht_action_output(ni, m); 2376195377Ssam } else { 2377195377Ssam vap->iv_stats.is_tx_nobuf++; 2378195377Ssam ieee80211_free_node(ni); 2379195377Ssam return ENOMEM; 2380195377Ssam } 2381195377Ssam} 2382195377Ssam 2383195377Ssamstatic int 2384195377Ssamht_send_action_ba_delba(struct ieee80211_node *ni, 2385195377Ssam int category, int action, void *arg0) 2386195377Ssam{ 2387195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2388195377Ssam struct ieee80211com *ic = ni->ni_ic; 2389195377Ssam uint16_t *args = arg0; 2390195377Ssam struct mbuf *m; 2391170530Ssam uint16_t baparamset; 2392195377Ssam uint8_t *frm; 2393170530Ssam 2394195377Ssam baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2395195377Ssam | args[1] 2396195377Ssam ; 2397195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2398195377Ssam "send DELBA action: tid %d, initiator %d reason %d", 2399195377Ssam args[0], args[1], args[2]); 2400170530Ssam 2401178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2402195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2403195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2404170530Ssam ieee80211_ref_node(ni); 2405170530Ssam 2406170530Ssam m = ieee80211_getmgtframe(&frm, 2407195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2408195377Ssam sizeof(uint16_t) /* action+category */ 2409195377Ssam /* XXX may action payload */ 2410195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2411170530Ssam ); 2412195377Ssam if (m != NULL) { 2413195377Ssam *frm++ = category; 2414195377Ssam *frm++ = action; 2415195377Ssam ADDSHORT(frm, baparamset); 2416195377Ssam ADDSHORT(frm, args[2]); /* reason code */ 2417195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2418195377Ssam return ht_action_output(ni, m); 2419195377Ssam } else { 2420195377Ssam vap->iv_stats.is_tx_nobuf++; 2421195377Ssam ieee80211_free_node(ni); 2422195377Ssam return ENOMEM; 2423195377Ssam } 2424195377Ssam} 2425170530Ssam 2426195377Ssamstatic int 2427195377Ssamht_send_action_ht_txchwidth(struct ieee80211_node *ni, 2428195377Ssam int category, int action, void *arg0) 2429195377Ssam{ 2430195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2431195377Ssam struct ieee80211com *ic = ni->ni_ic; 2432195377Ssam struct mbuf *m; 2433195377Ssam uint8_t *frm; 2434170530Ssam 2435195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2436195377Ssam "send HT txchwidth: width %d", 2437195377Ssam IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 2438170530Ssam 2439195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2440195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2441195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2442195377Ssam ieee80211_ref_node(ni); 2443170530Ssam 2444195377Ssam m = ieee80211_getmgtframe(&frm, 2445195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2446195377Ssam sizeof(uint16_t) /* action+category */ 2447195377Ssam /* XXX may action payload */ 2448195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2449195377Ssam ); 2450195377Ssam if (m != NULL) { 2451195377Ssam *frm++ = category; 2452195377Ssam *frm++ = action; 2453195377Ssam *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2454195377Ssam IEEE80211_A_HT_TXCHWIDTH_2040 : 2455195377Ssam IEEE80211_A_HT_TXCHWIDTH_20; 2456195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2457195377Ssam return ht_action_output(ni, m); 2458195377Ssam } else { 2459195377Ssam vap->iv_stats.is_tx_nobuf++; 2460195377Ssam ieee80211_free_node(ni); 2461195377Ssam return ENOMEM; 2462170530Ssam } 2463195377Ssam} 2464170530Ssam#undef ADDSHORT 2465170530Ssam 2466170530Ssam/* 2467219600Sbschmidt * Construct the MCS bit mask for inclusion in an HT capabilities 2468219600Sbschmidt * information element. 2469170530Ssam */ 2470219600Sbschmidtstatic void 2471219600Sbschmidtieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 2472170530Ssam{ 2473170530Ssam int i; 2474219600Sbschmidt uint8_t txparams; 2475170530Ssam 2476219600Sbschmidt KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 2477219600Sbschmidt ("ic_rxstream %d out of range", ic->ic_rxstream)); 2478219600Sbschmidt KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 2479219600Sbschmidt ("ic_txstream %d out of range", ic->ic_txstream)); 2480219600Sbschmidt 2481219600Sbschmidt for (i = 0; i < ic->ic_rxstream * 8; i++) 2482219600Sbschmidt setbit(frm, i); 2483219600Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 2484219600Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 2485219600Sbschmidt setbit(frm, 32); 2486219600Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 2487219600Sbschmidt if (ic->ic_rxstream >= 2) { 2488219600Sbschmidt for (i = 33; i <= 38; i++) 2489219600Sbschmidt setbit(frm, i); 2490170530Ssam } 2491219600Sbschmidt if (ic->ic_rxstream >= 3) { 2492219600Sbschmidt for (i = 39; i <= 52; i++) 2493219600Sbschmidt setbit(frm, i); 2494219600Sbschmidt } 2495219600Sbschmidt if (ic->ic_txstream >= 4) { 2496219600Sbschmidt for (i = 53; i <= 76; i++) 2497219600Sbschmidt setbit(frm, i); 2498219600Sbschmidt } 2499170530Ssam } 2500219600Sbschmidt 2501219600Sbschmidt if (ic->ic_rxstream != ic->ic_txstream) { 2502219600Sbschmidt txparams = 0x1; /* TX MCS set defined */ 2503219600Sbschmidt txparams |= 0x2; /* TX RX MCS not equal */ 2504219600Sbschmidt txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 2505219600Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 2506219600Sbschmidt txparams |= 0x16; /* TX unequal modulation sup */ 2507219600Sbschmidt } else 2508219600Sbschmidt txparams = 0; 2509219600Sbschmidt frm[12] = txparams; 2510170530Ssam} 2511170530Ssam 2512170530Ssam/* 2513170530Ssam * Add body of an HTCAP information element. 2514170530Ssam */ 2515170530Ssamstatic uint8_t * 2516170530Ssamieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2517170530Ssam{ 2518170530Ssam#define ADDSHORT(frm, v) do { \ 2519170530Ssam frm[0] = (v) & 0xff; \ 2520170530Ssam frm[1] = (v) >> 8; \ 2521170530Ssam frm += 2; \ 2522170530Ssam} while (0) 2523178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2524205513Srpaulo uint16_t caps, extcaps; 2525173865Ssam int rxmax, density; 2526170530Ssam 2527170530Ssam /* HT capabilities */ 2528178354Ssam caps = vap->iv_htcaps & 0xffff; 2529173273Ssam /* 2530173273Ssam * Note channel width depends on whether we are operating as 2531173273Ssam * a sta or not. When operating as a sta we are generating 2532173273Ssam * a request based on our desired configuration. Otherwise 2533173273Ssam * we are operational and the channel attributes identify 2534173273Ssam * how we've been setup (which might be different if a fixed 2535173273Ssam * channel is specified). 2536173273Ssam */ 2537178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 2538173273Ssam /* override 20/40 use based on config */ 2539193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 2540173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2541173273Ssam else 2542173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2543173865Ssam /* use advertised setting (XXX locally constraint) */ 2544173865Ssam rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 2545173865Ssam density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 2546173273Ssam } else { 2547173273Ssam /* override 20/40 use based on current channel */ 2548178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2549173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2550173273Ssam else 2551173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2552178354Ssam rxmax = vap->iv_ampdu_rxmax; 2553178354Ssam density = vap->iv_ampdu_density; 2554173273Ssam } 2555170530Ssam /* adjust short GI based on channel and config */ 2556193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 2557170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI20; 2558193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 2559170530Ssam (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2560170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI40; 2561170530Ssam ADDSHORT(frm, caps); 2562170530Ssam 2563170530Ssam /* HT parameters */ 2564173865Ssam *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2565173865Ssam | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2566173273Ssam ; 2567170530Ssam frm++; 2568170530Ssam 2569170530Ssam /* pre-zero remainder of ie */ 2570170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2571170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2572170530Ssam 2573170530Ssam /* supported MCS set */ 2574173273Ssam /* 2575219600Sbschmidt * XXX: For sta mode the rate set should be restricted based 2576219600Sbschmidt * on the AP's capabilities, but ni_htrates isn't setup when 2577219600Sbschmidt * we're called to form an AssocReq frame so for now we're 2578219600Sbschmidt * restricted to the device capabilities. 2579173273Ssam */ 2580219600Sbschmidt ieee80211_set_mcsset(ni->ni_ic, frm); 2581170530Ssam 2582205513Srpaulo frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 2583205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2584205513Srpaulo 2585205513Srpaulo /* HT extended capabilities */ 2586205513Srpaulo extcaps = vap->iv_htextcaps & 0xffff; 2587205513Srpaulo 2588205513Srpaulo ADDSHORT(frm, extcaps); 2589205513Srpaulo 2590170530Ssam frm += sizeof(struct ieee80211_ie_htcap) - 2591205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_txbf); 2592205513Srpaulo 2593170530Ssam return frm; 2594170530Ssam#undef ADDSHORT 2595170530Ssam} 2596170530Ssam 2597170530Ssam/* 2598170530Ssam * Add 802.11n HT capabilities information element 2599170530Ssam */ 2600170530Ssamuint8_t * 2601170530Ssamieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2602170530Ssam{ 2603170530Ssam frm[0] = IEEE80211_ELEMID_HTCAP; 2604170530Ssam frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2605170530Ssam return ieee80211_add_htcap_body(frm + 2, ni); 2606170530Ssam} 2607170530Ssam 2608170530Ssam/* 2609170530Ssam * Add Broadcom OUI wrapped standard HTCAP ie; this is 2610170530Ssam * used for compatibility w/ pre-draft implementations. 2611170530Ssam */ 2612170530Ssamuint8_t * 2613170530Ssamieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2614170530Ssam{ 2615170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2616170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2617170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2618170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2619170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2620170530Ssam frm[5] = BCM_OUI_HTCAP; 2621170530Ssam return ieee80211_add_htcap_body(frm + 6, ni); 2622170530Ssam} 2623170530Ssam 2624170530Ssam/* 2625170530Ssam * Construct the MCS bit mask of basic rates 2626170530Ssam * for inclusion in an HT information element. 2627170530Ssam */ 2628170530Ssamstatic void 2629170530Ssamieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2630170530Ssam{ 2631170530Ssam int i; 2632170530Ssam 2633170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2634170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2635170530Ssam if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2636170530Ssam r < IEEE80211_HTRATE_MAXSIZE) { 2637170530Ssam /* NB: this assumes a particular implementation */ 2638170530Ssam setbit(frm, r); 2639170530Ssam } 2640170530Ssam } 2641170530Ssam} 2642170530Ssam 2643170530Ssam/* 2644172211Ssam * Update the HTINFO ie for a beacon frame. 2645172211Ssam */ 2646172211Ssamvoid 2647178354Ssamieee80211_ht_update_beacon(struct ieee80211vap *vap, 2648172211Ssam struct ieee80211_beacon_offsets *bo) 2649172211Ssam{ 2650172211Ssam#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2651178354Ssam const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2652178354Ssam struct ieee80211com *ic = vap->iv_ic; 2653172211Ssam struct ieee80211_ie_htinfo *ht = 2654172211Ssam (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2655172211Ssam 2656172211Ssam /* XXX only update on channel change */ 2657178354Ssam ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2658193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2659183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 2660183256Ssam else 2661183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2662178354Ssam if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2663172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2664178354Ssam else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2665172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2666172211Ssam else 2667172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2668178354Ssam if (IEEE80211_IS_CHAN_HT40(bsschan)) 2669172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2670172211Ssam 2671172211Ssam /* protection mode */ 2672172211Ssam ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2673172211Ssam 2674172211Ssam /* XXX propagate to vendor ie's */ 2675172211Ssam#undef PROTMODE 2676172211Ssam} 2677172211Ssam 2678172211Ssam/* 2679170530Ssam * Add body of an HTINFO information element. 2680173273Ssam * 2681173273Ssam * NB: We don't use struct ieee80211_ie_htinfo because we can 2682173273Ssam * be called to fillin both a standard ie and a compat ie that 2683173273Ssam * has a vendor OUI at the front. 2684170530Ssam */ 2685170530Ssamstatic uint8_t * 2686170530Ssamieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2687170530Ssam{ 2688183256Ssam struct ieee80211vap *vap = ni->ni_vap; 2689170530Ssam struct ieee80211com *ic = ni->ni_ic; 2690170530Ssam 2691170530Ssam /* pre-zero remainder of ie */ 2692170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2693170530Ssam 2694170530Ssam /* primary/control channel center */ 2695178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2696170530Ssam 2697193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2698183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 2699183256Ssam else 2700183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2701178354Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2702170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2703178354Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2704170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2705170530Ssam else 2706170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2707178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2708170530Ssam frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2709170530Ssam 2710172211Ssam frm[1] = ic->ic_curhtprotmode; 2711170530Ssam 2712170530Ssam frm += 5; 2713170530Ssam 2714170530Ssam /* basic MCS set */ 2715170530Ssam ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2716170530Ssam frm += sizeof(struct ieee80211_ie_htinfo) - 2717170530Ssam __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2718170530Ssam return frm; 2719170530Ssam} 2720170530Ssam 2721170530Ssam/* 2722170530Ssam * Add 802.11n HT information information element. 2723170530Ssam */ 2724170530Ssamuint8_t * 2725170530Ssamieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2726170530Ssam{ 2727170530Ssam frm[0] = IEEE80211_ELEMID_HTINFO; 2728170530Ssam frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2729170530Ssam return ieee80211_add_htinfo_body(frm + 2, ni); 2730170530Ssam} 2731170530Ssam 2732170530Ssam/* 2733170530Ssam * Add Broadcom OUI wrapped standard HTINFO ie; this is 2734170530Ssam * used for compatibility w/ pre-draft implementations. 2735170530Ssam */ 2736170530Ssamuint8_t * 2737170530Ssamieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2738170530Ssam{ 2739170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2740170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2741170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2742170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2743170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2744170530Ssam frm[5] = BCM_OUI_HTINFO; 2745170530Ssam return ieee80211_add_htinfo_body(frm + 6, ni); 2746170530Ssam} 2747