ieee80211_ht.c revision 235801
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 235801 2012-05-22 19:37:12Z adrian $"); 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); 220223331Sadrianstatic void null_addba_response_timeout(struct ieee80211_node *ni, 221223331Sadrian struct ieee80211_tx_ampdu *tap); 222223331Sadrian 223184280Ssamstatic void ieee80211_bar_response(struct ieee80211_node *ni, 224184280Ssam struct ieee80211_tx_ampdu *tap, int status); 225184280Ssamstatic void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 226184280Ssamstatic void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 227191552Ssamstatic int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 228191552Ssam int baparamset, int batimeout, int baseqctl); 229191552Ssamstatic void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 230170530Ssam 231170530Ssamvoid 232170530Ssamieee80211_ht_attach(struct ieee80211com *ic) 233170530Ssam{ 234170530Ssam /* setup default aggregation policy */ 235195377Ssam ic->ic_recv_action = ieee80211_recv_action; 236170530Ssam ic->ic_send_action = ieee80211_send_action; 237178354Ssam ic->ic_ampdu_enable = ieee80211_ampdu_enable; 238170530Ssam ic->ic_addba_request = ieee80211_addba_request; 239170530Ssam ic->ic_addba_response = ieee80211_addba_response; 240223331Sadrian ic->ic_addba_response_timeout = null_addba_response_timeout; 241170530Ssam ic->ic_addba_stop = ieee80211_addba_stop; 242184280Ssam ic->ic_bar_response = ieee80211_bar_response; 243191552Ssam ic->ic_ampdu_rx_start = ampdu_rx_start; 244191552Ssam ic->ic_ampdu_rx_stop = ampdu_rx_stop; 245170530Ssam 246173273Ssam ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 247173273Ssam ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 248178354Ssam} 249173273Ssam 250178354Ssamvoid 251178354Ssamieee80211_ht_detach(struct ieee80211com *ic) 252178354Ssam{ 253178354Ssam} 254173273Ssam 255178354Ssamvoid 256178354Ssamieee80211_ht_vattach(struct ieee80211vap *vap) 257178354Ssam{ 258178354Ssam 259178354Ssam /* driver can override defaults */ 260178354Ssam vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 261178354Ssam vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 262178354Ssam vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 263178354Ssam vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 264178354Ssam /* tx aggregation traffic thresholds */ 265178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 266178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 267178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 268178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 269178354Ssam 270178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 271170530Ssam /* 272173273Ssam * Device is HT capable; enable all HT-related 273173273Ssam * facilities by default. 274170530Ssam * XXX these choices may be too aggressive. 275170530Ssam */ 276193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_HT 277193655Ssam | IEEE80211_FHT_HTCOMPAT 278193655Ssam ; 279178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 280193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 281173273Ssam /* XXX infer from channel list? */ 282178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 283193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 284178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 285193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 286170530Ssam } 287183256Ssam /* enable RIFS if capable */ 288183256Ssam if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 289193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 290183256Ssam 291170530Ssam /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 292193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 293178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 294193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 295193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 296178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 297193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 298170530Ssam } 299178354Ssam /* NB: disable default legacy WDS, too many issues right now */ 300178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 301193655Ssam vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 302170530Ssam} 303170530Ssam 304170530Ssamvoid 305178354Ssamieee80211_ht_vdetach(struct ieee80211vap *vap) 306170530Ssam{ 307170530Ssam} 308170530Ssam 309219598Sbschmidtstatic int 310228621Sbschmidtht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode, 311228621Sbschmidt int ratetype) 312219598Sbschmidt{ 313219598Sbschmidt int mword, rate; 314219598Sbschmidt 315219598Sbschmidt mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode); 316219598Sbschmidt if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 317219598Sbschmidt return (0); 318219598Sbschmidt switch (ratetype) { 319219598Sbschmidt case 0: 320219598Sbschmidt rate = ieee80211_htrates[index].ht20_rate_800ns; 321219598Sbschmidt break; 322219598Sbschmidt case 1: 323219598Sbschmidt rate = ieee80211_htrates[index].ht20_rate_400ns; 324219598Sbschmidt break; 325219598Sbschmidt case 2: 326219598Sbschmidt rate = ieee80211_htrates[index].ht40_rate_800ns; 327219598Sbschmidt break; 328219598Sbschmidt default: 329219598Sbschmidt rate = ieee80211_htrates[index].ht40_rate_400ns; 330219598Sbschmidt break; 331219598Sbschmidt } 332219598Sbschmidt return (rate); 333219598Sbschmidt} 334219598Sbschmidt 335219598Sbschmidtstatic struct printranges { 336219598Sbschmidt int minmcs; 337219598Sbschmidt int maxmcs; 338219598Sbschmidt int txstream; 339219598Sbschmidt int ratetype; 340219598Sbschmidt int htcapflags; 341219598Sbschmidt} ranges[] = { 342219598Sbschmidt { 0, 7, 1, 0, 0 }, 343219598Sbschmidt { 8, 15, 2, 0, 0 }, 344219598Sbschmidt { 16, 23, 3, 0, 0 }, 345219598Sbschmidt { 24, 31, 4, 0, 0 }, 346219598Sbschmidt { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 347219598Sbschmidt { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 348219598Sbschmidt { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 349219598Sbschmidt { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 350219598Sbschmidt { 0, 0, 0, 0, 0 }, 351219598Sbschmidt}; 352219598Sbschmidt 353170530Ssamstatic void 354228621Sbschmidtht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype) 355170530Ssam{ 356219598Sbschmidt struct ifnet *ifp = ic->ic_ifp; 357219598Sbschmidt int minrate, maxrate; 358219598Sbschmidt struct printranges *range; 359170530Ssam 360219598Sbschmidt for (range = ranges; range->txstream != 0; range++) { 361219598Sbschmidt if (ic->ic_txstream < range->txstream) 362170530Ssam continue; 363219598Sbschmidt if (range->htcapflags && 364219598Sbschmidt (ic->ic_htcaps & range->htcapflags) == 0) 365219598Sbschmidt continue; 366219598Sbschmidt if (ratetype < range->ratetype) 367219598Sbschmidt continue; 368219598Sbschmidt minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 369219598Sbschmidt maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 370219598Sbschmidt if (range->maxmcs) { 371219598Sbschmidt if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 372219598Sbschmidt range->minmcs, range->maxmcs, 373219598Sbschmidt minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 374219598Sbschmidt maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 375219598Sbschmidt } else { 376219598Sbschmidt if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs, 377219598Sbschmidt minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 378205277Srpaulo } 379170530Ssam } 380170530Ssam} 381170530Ssam 382205277Srpaulostatic void 383228621Sbschmidtht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode) 384205277Srpaulo{ 385205277Srpaulo struct ifnet *ifp = ic->ic_ifp; 386205277Srpaulo const char *modestr = ieee80211_phymode_name[mode]; 387219598Sbschmidt 388219606Sbschmidt if_printf(ifp, "%s MCS 20MHz\n", modestr); 389219598Sbschmidt ht_rateprint(ic, mode, 0); 390219598Sbschmidt if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 391219606Sbschmidt if_printf(ifp, "%s MCS 20MHz SGI\n", modestr); 392219598Sbschmidt ht_rateprint(ic, mode, 1); 393219598Sbschmidt } 394219598Sbschmidt if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 395219606Sbschmidt if_printf(ifp, "%s MCS 40MHz:\n", modestr); 396219598Sbschmidt ht_rateprint(ic, mode, 2); 397219598Sbschmidt } 398219598Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 399219598Sbschmidt (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 400219606Sbschmidt if_printf(ifp, "%s MCS 40MHz SGI:\n", modestr); 401219598Sbschmidt ht_rateprint(ic, mode, 3); 402219598Sbschmidt } 403205277Srpaulo} 404205277Srpaulo 405170530Ssamvoid 406170530Ssamieee80211_ht_announce(struct ieee80211com *ic) 407170530Ssam{ 408219598Sbschmidt struct ifnet *ifp = ic->ic_ifp; 409219598Sbschmidt 410219598Sbschmidt if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 411219598Sbschmidt isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 412219598Sbschmidt if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 413170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 414219598Sbschmidt ht_announce(ic, IEEE80211_MODE_11NA); 415170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 416219598Sbschmidt ht_announce(ic, IEEE80211_MODE_11NG); 417170530Ssam} 418170530Ssam 419219602Sbschmidtstatic struct ieee80211_htrateset htrateset; 420219602Sbschmidt 421170530Ssamconst struct ieee80211_htrateset * 422170530Ssamieee80211_get_suphtrates(struct ieee80211com *ic, 423219602Sbschmidt const struct ieee80211_channel *c) 424170530Ssam{ 425219602Sbschmidt#define ADDRATE(x) do { \ 426219602Sbschmidt htrateset.rs_rates[htrateset.rs_nrates] = x; \ 427219602Sbschmidt htrateset.rs_nrates++; \ 428219602Sbschmidt} while (0) 429219602Sbschmidt int i; 430219602Sbschmidt 431219602Sbschmidt memset(&htrateset, 0, sizeof(struct ieee80211_htrateset)); 432219602Sbschmidt for (i = 0; i < ic->ic_txstream * 8; i++) 433219602Sbschmidt ADDRATE(i); 434219602Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 435219602Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 436229284Sbschmidt ADDRATE(32); 437219602Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 438219602Sbschmidt if (ic->ic_txstream >= 2) { 439219602Sbschmidt for (i = 33; i <= 38; i++) 440219602Sbschmidt ADDRATE(i); 441219602Sbschmidt } 442219602Sbschmidt if (ic->ic_txstream >= 3) { 443219602Sbschmidt for (i = 39; i <= 52; i++) 444219602Sbschmidt ADDRATE(i); 445219602Sbschmidt } 446219602Sbschmidt if (ic->ic_txstream == 4) { 447219602Sbschmidt for (i = 53; i <= 76; i++) 448219602Sbschmidt ADDRATE(i); 449219602Sbschmidt } 450219602Sbschmidt } 451219602Sbschmidt return &htrateset; 452219602Sbschmidt#undef ADDRATE 453170530Ssam} 454170530Ssam 455170530Ssam/* 456170530Ssam * Receive processing. 457170530Ssam */ 458170530Ssam 459170530Ssam/* 460170530Ssam * Decap the encapsulated A-MSDU frames and dispatch all but 461170530Ssam * the last for delivery. The last frame is returned for 462170530Ssam * delivery via the normal path. 463170530Ssam */ 464170530Ssamstruct mbuf * 465170530Ssamieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 466170530Ssam{ 467178354Ssam struct ieee80211vap *vap = ni->ni_vap; 468173462Ssam int framelen; 469170530Ssam struct mbuf *n; 470170530Ssam 471170530Ssam /* discard 802.3 header inserted by ieee80211_decap */ 472170530Ssam m_adj(m, sizeof(struct ether_header)); 473170530Ssam 474178354Ssam vap->iv_stats.is_amsdu_decap++; 475170530Ssam 476170530Ssam for (;;) { 477170530Ssam /* 478170530Ssam * Decap the first frame, bust it apart from the 479170530Ssam * remainder and deliver. We leave the last frame 480170530Ssam * delivery to the caller (for consistency with other 481170530Ssam * code paths, could also do it here). 482170530Ssam */ 483170530Ssam m = ieee80211_decap1(m, &framelen); 484170530Ssam if (m == NULL) { 485178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 486173462Ssam ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 487178354Ssam vap->iv_stats.is_amsdu_tooshort++; 488170530Ssam return NULL; 489170530Ssam } 490173462Ssam if (m->m_pkthdr.len == framelen) 491170530Ssam break; 492170530Ssam n = m_split(m, framelen, M_NOWAIT); 493170530Ssam if (n == NULL) { 494178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 495170530Ssam ni->ni_macaddr, "a-msdu", 496170530Ssam "%s", "unable to split encapsulated frames"); 497178354Ssam vap->iv_stats.is_amsdu_split++; 498170530Ssam m_freem(m); /* NB: must reclaim */ 499170530Ssam return NULL; 500170530Ssam } 501178354Ssam vap->iv_deliver_data(vap, ni, m); 502170530Ssam 503170530Ssam /* 504170530Ssam * Remove frame contents; each intermediate frame 505170530Ssam * is required to be aligned to a 4-byte boundary. 506170530Ssam */ 507170530Ssam m = n; 508170530Ssam m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 509170530Ssam } 510170530Ssam return m; /* last delivered by caller */ 511170530Ssam} 512170530Ssam 513170530Ssam/* 514170530Ssam * Purge all frames in the A-MPDU re-order queue. 515170530Ssam */ 516170530Ssamstatic void 517170530Ssamampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 518170530Ssam{ 519170530Ssam struct mbuf *m; 520170530Ssam int i; 521170530Ssam 522170530Ssam for (i = 0; i < rap->rxa_wnd; i++) { 523170530Ssam m = rap->rxa_m[i]; 524170530Ssam if (m != NULL) { 525170530Ssam rap->rxa_m[i] = NULL; 526170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 527170530Ssam m_freem(m); 528170530Ssam if (--rap->rxa_qframes == 0) 529170530Ssam break; 530170530Ssam } 531170530Ssam } 532170530Ssam KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 533170530Ssam ("lost %u data, %u frames on ampdu rx q", 534170530Ssam rap->rxa_qbytes, rap->rxa_qframes)); 535170530Ssam} 536170530Ssam 537170530Ssam/* 538178354Ssam * Start A-MPDU rx/re-order processing for the specified TID. 539178354Ssam */ 540191552Ssamstatic int 541191552Ssamampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 542191552Ssam int baparamset, int batimeout, int baseqctl) 543178354Ssam{ 544191552Ssam int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 545191552Ssam 546178354Ssam if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 547178354Ssam /* 548178354Ssam * AMPDU previously setup and not terminated with a DELBA, 549178354Ssam * flush the reorder q's in case anything remains. 550178354Ssam */ 551178354Ssam ampdu_rx_purge(rap); 552178354Ssam } 553178354Ssam memset(rap, 0, sizeof(*rap)); 554178354Ssam rap->rxa_wnd = (bufsiz == 0) ? 555178354Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 556191552Ssam rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START); 557178354Ssam rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 558191552Ssam 559191552Ssam return 0; 560178354Ssam} 561178354Ssam 562178354Ssam/* 563170530Ssam * Stop A-MPDU rx processing for the specified TID. 564170530Ssam */ 565170530Ssamstatic void 566191552Ssamampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 567170530Ssam{ 568205277Srpaulo 569170530Ssam ampdu_rx_purge(rap); 570178354Ssam rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 571170530Ssam} 572170530Ssam 573170530Ssam/* 574170530Ssam * Dispatch a frame from the A-MPDU reorder queue. The 575170530Ssam * frame is fed back into ieee80211_input marked with an 576183247Ssam * M_AMPDU_MPDU flag so it doesn't come back to us (it also 577170530Ssam * permits ieee80211_input to optimize re-processing). 578170530Ssam */ 579170530Ssamstatic __inline void 580170530Ssamampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 581170530Ssam{ 582183247Ssam m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 583192468Ssam /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 584192468Ssam (void) ieee80211_input(ni, m, 0, 0); 585170530Ssam} 586170530Ssam 587170530Ssam/* 588170530Ssam * Dispatch as many frames as possible from the re-order queue. 589170530Ssam * Frames will always be "at the front"; we process all frames 590170530Ssam * up to the first empty slot in the window. On completion we 591170530Ssam * cleanup state if there are still pending frames in the current 592170530Ssam * BA window. We assume the frame at slot 0 is already handled 593170530Ssam * by the caller; we always start at slot 1. 594170530Ssam */ 595170530Ssamstatic void 596170530Ssamampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 597170530Ssam{ 598178354Ssam struct ieee80211vap *vap = ni->ni_vap; 599170530Ssam struct mbuf *m; 600170530Ssam int i; 601170530Ssam 602170530Ssam /* flush run of frames */ 603170530Ssam for (i = 1; i < rap->rxa_wnd; i++) { 604170530Ssam m = rap->rxa_m[i]; 605170530Ssam if (m == NULL) 606170530Ssam break; 607170530Ssam rap->rxa_m[i] = NULL; 608170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 609170530Ssam rap->rxa_qframes--; 610170530Ssam 611170530Ssam ampdu_dispatch(ni, m); 612170530Ssam } 613170530Ssam /* 614170530Ssam * If frames remain, copy the mbuf pointers down so 615170530Ssam * they correspond to the offsets in the new window. 616170530Ssam */ 617170530Ssam if (rap->rxa_qframes != 0) { 618170530Ssam int n = rap->rxa_qframes, j; 619170530Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 620170530Ssam if (rap->rxa_m[j] != NULL) { 621170530Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 622170530Ssam rap->rxa_m[j] = NULL; 623170530Ssam if (--n == 0) 624170530Ssam break; 625170530Ssam } 626170530Ssam } 627170530Ssam KASSERT(n == 0, ("lost %d frames", n)); 628178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 629170530Ssam } 630173273Ssam /* 631173273Ssam * Adjust the start of the BA window to 632173273Ssam * reflect the frames just dispatched. 633173273Ssam */ 634173273Ssam rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 635178354Ssam vap->iv_stats.is_ampdu_rx_oor += i; 636170530Ssam} 637170530Ssam 638173273Ssam#ifdef IEEE80211_AMPDU_AGE 639170530Ssam/* 640173273Ssam * Dispatch all frames in the A-MPDU re-order queue. 641170530Ssam */ 642170530Ssamstatic void 643173273Ssamampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 644170530Ssam{ 645178354Ssam struct ieee80211vap *vap = ni->ni_vap; 646170530Ssam struct mbuf *m; 647170530Ssam int i; 648170530Ssam 649173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 650170530Ssam m = rap->rxa_m[i]; 651170530Ssam if (m == NULL) 652170530Ssam continue; 653170530Ssam rap->rxa_m[i] = NULL; 654170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 655173273Ssam rap->rxa_qframes--; 656178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 657173273Ssam 658170530Ssam ampdu_dispatch(ni, m); 659173273Ssam if (rap->rxa_qframes == 0) 660170530Ssam break; 661170530Ssam } 662170530Ssam} 663173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 664170530Ssam 665170530Ssam/* 666173273Ssam * Dispatch all frames in the A-MPDU re-order queue 667173273Ssam * preceding the specified sequence number. This logic 668173273Ssam * handles window moves due to a received MSDU or BAR. 669173273Ssam */ 670173273Ssamstatic void 671173273Ssamampdu_rx_flush_upto(struct ieee80211_node *ni, 672173273Ssam struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 673173273Ssam{ 674178354Ssam struct ieee80211vap *vap = ni->ni_vap; 675173273Ssam struct mbuf *m; 676173273Ssam ieee80211_seq seqno; 677173273Ssam int i; 678173273Ssam 679173273Ssam /* 680173273Ssam * Flush any complete MSDU's with a sequence number lower 681173273Ssam * than winstart. Gaps may exist. Note that we may actually 682173273Ssam * dispatch frames past winstart if a run continues; this is 683173273Ssam * an optimization that avoids having to do a separate pass 684173273Ssam * to dispatch frames after moving the BA window start. 685173273Ssam */ 686173273Ssam seqno = rap->rxa_start; 687173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 688173273Ssam m = rap->rxa_m[i]; 689173273Ssam if (m != NULL) { 690173273Ssam rap->rxa_m[i] = NULL; 691173273Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 692173273Ssam rap->rxa_qframes--; 693178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 694173273Ssam 695173273Ssam ampdu_dispatch(ni, m); 696173273Ssam } else { 697173273Ssam if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 698173273Ssam break; 699173273Ssam } 700173273Ssam seqno = IEEE80211_SEQ_INC(seqno); 701173273Ssam } 702173273Ssam /* 703173273Ssam * If frames remain, copy the mbuf pointers down so 704173273Ssam * they correspond to the offsets in the new window. 705173273Ssam */ 706173273Ssam if (rap->rxa_qframes != 0) { 707173273Ssam int n = rap->rxa_qframes, j; 708178354Ssam 709178354Ssam /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 710178354Ssam KASSERT(rap->rxa_m[0] == NULL, 711178354Ssam ("%s: BA window slot 0 occupied", __func__)); 712173273Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 713173273Ssam if (rap->rxa_m[j] != NULL) { 714173273Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 715173273Ssam rap->rxa_m[j] = NULL; 716173273Ssam if (--n == 0) 717173273Ssam break; 718173273Ssam } 719173273Ssam } 720173273Ssam KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 721173273Ssam "BA win <%d:%d> winstart %d", 722173273Ssam __func__, n, rap->rxa_qframes, i, rap->rxa_start, 723173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 724173273Ssam winstart)); 725178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 726173273Ssam } 727173273Ssam /* 728173273Ssam * Move the start of the BA window; we use the 729173273Ssam * sequence number of the last MSDU that was 730173273Ssam * passed up the stack+1 or winstart if stopped on 731173273Ssam * a gap in the reorder buffer. 732173273Ssam */ 733173273Ssam rap->rxa_start = seqno; 734173273Ssam} 735173273Ssam 736173273Ssam/* 737170530Ssam * Process a received QoS data frame for an HT station. Handle 738170530Ssam * A-MPDU reordering: if this frame is received out of order 739170530Ssam * and falls within the BA window hold onto it. Otherwise if 740173273Ssam * this frame completes a run, flush any pending frames. We 741170530Ssam * return 1 if the frame is consumed. A 0 is returned if 742170530Ssam * the frame should be processed normally by the caller. 743170530Ssam */ 744170530Ssamint 745170530Ssamieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 746170530Ssam{ 747170530Ssam#define IEEE80211_FC0_QOSDATA \ 748170530Ssam (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 749173273Ssam#define PROCESS 0 /* caller should process frame */ 750173273Ssam#define CONSUMED 1 /* frame consumed, caller does nothing */ 751178354Ssam struct ieee80211vap *vap = ni->ni_vap; 752170530Ssam struct ieee80211_qosframe *wh; 753170530Ssam struct ieee80211_rx_ampdu *rap; 754170530Ssam ieee80211_seq rxseq; 755170530Ssam uint8_t tid; 756170530Ssam int off; 757170530Ssam 758183247Ssam KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 759183247Ssam ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 760170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 761170530Ssam 762170530Ssam /* NB: m_len known to be sufficient */ 763170530Ssam wh = mtod(m, struct ieee80211_qosframe *); 764183247Ssam if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 765183247Ssam /* 766183247Ssam * Not QoS data, shouldn't get here but just 767183247Ssam * return it to the caller for processing. 768183247Ssam */ 769183247Ssam return PROCESS; 770183247Ssam } 771193840Ssam if (IEEE80211_IS_DSTODS(wh)) 772173273Ssam tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 773173273Ssam else 774173273Ssam tid = wh->i_qos[0]; 775173273Ssam tid &= IEEE80211_QOS_TID; 776170530Ssam rap = &ni->ni_rx_ampdu[tid]; 777170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 778170530Ssam /* 779170530Ssam * No ADDBA request yet, don't touch. 780170530Ssam */ 781173273Ssam return PROCESS; 782170530Ssam } 783182827Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 784182827Ssam if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 785182827Ssam /* 786182827Ssam * Fragments are not allowed; toss. 787182827Ssam */ 788182827Ssam IEEE80211_DISCARD_MAC(vap, 789182827Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 790182827Ssam "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 791182827Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 792182827Ssam vap->iv_stats.is_ampdu_rx_drop++; 793182827Ssam IEEE80211_NODE_STAT(ni, rx_drop); 794182827Ssam m_freem(m); 795182827Ssam return CONSUMED; 796182827Ssam } 797182827Ssam rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 798173273Ssam rap->rxa_nframes++; 799173273Ssamagain: 800170530Ssam if (rxseq == rap->rxa_start) { 801170530Ssam /* 802170530Ssam * First frame in window. 803170530Ssam */ 804170530Ssam if (rap->rxa_qframes != 0) { 805170530Ssam /* 806170530Ssam * Dispatch as many packets as we can. 807170530Ssam */ 808170530Ssam KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 809170530Ssam ampdu_dispatch(ni, m); 810170530Ssam ampdu_rx_dispatch(rap, ni); 811173273Ssam return CONSUMED; 812170530Ssam } else { 813170530Ssam /* 814170530Ssam * In order; advance window and notify 815170530Ssam * caller to dispatch directly. 816170530Ssam */ 817170530Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 818173273Ssam return PROCESS; 819170530Ssam } 820170530Ssam } 821170530Ssam /* 822173273Ssam * Frame is out of order; store if in the BA window. 823170530Ssam */ 824170530Ssam /* calculate offset in BA window */ 825170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 826173273Ssam if (off < rap->rxa_wnd) { 827170530Ssam /* 828173273Ssam * Common case (hopefully): in the BA window. 829205277Srpaulo * Sec 9.10.7.6.2 a) (p.137) 830173273Ssam */ 831173273Ssam#ifdef IEEE80211_AMPDU_AGE 832173273Ssam /* 833173273Ssam * Check for frames sitting too long in the reorder queue. 834173273Ssam * This should only ever happen if frames are not delivered 835173273Ssam * without the sender otherwise notifying us (e.g. with a 836173273Ssam * BAR to move the window). Typically this happens because 837173273Ssam * of vendor bugs that cause the sequence number to jump. 838173273Ssam * When this happens we get a gap in the reorder queue that 839173273Ssam * leaves frame sitting on the queue until they get pushed 840173273Ssam * out due to window moves. When the vendor does not send 841173273Ssam * BAR this move only happens due to explicit packet sends 842170530Ssam * 843173273Ssam * NB: we only track the time of the oldest frame in the 844173273Ssam * reorder q; this means that if we flush we might push 845173273Ssam * frames that still "new"; if this happens then subsequent 846173273Ssam * frames will result in BA window moves which cost something 847173273Ssam * but is still better than a big throughput dip. 848170530Ssam */ 849173273Ssam if (rap->rxa_qframes != 0) { 850173273Ssam /* XXX honor batimeout? */ 851173273Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 852173273Ssam /* 853173273Ssam * Too long since we received the first 854173273Ssam * frame; flush the reorder buffer. 855173273Ssam */ 856173273Ssam if (rap->rxa_qframes != 0) { 857178354Ssam vap->iv_stats.is_ampdu_rx_age += 858173273Ssam rap->rxa_qframes; 859173273Ssam ampdu_rx_flush(ni, rap); 860173273Ssam } 861173273Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 862173273Ssam return PROCESS; 863173273Ssam } 864173273Ssam } else { 865173273Ssam /* 866173273Ssam * First frame, start aging timer. 867173273Ssam */ 868173273Ssam rap->rxa_age = ticks; 869173273Ssam } 870173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 871173273Ssam /* save packet */ 872173273Ssam if (rap->rxa_m[off] == NULL) { 873173273Ssam rap->rxa_m[off] = m; 874173273Ssam rap->rxa_qframes++; 875173273Ssam rap->rxa_qbytes += m->m_pkthdr.len; 876178354Ssam vap->iv_stats.is_ampdu_rx_reorder++; 877173273Ssam } else { 878178354Ssam IEEE80211_DISCARD_MAC(vap, 879173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 880173273Ssam ni->ni_macaddr, "a-mpdu duplicate", 881173273Ssam "seqno %u tid %u BA win <%u:%u>", 882173273Ssam rxseq, tid, rap->rxa_start, 883173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 884178354Ssam vap->iv_stats.is_rx_dup++; 885173273Ssam IEEE80211_NODE_STAT(ni, rx_dup); 886173273Ssam m_freem(m); 887173273Ssam } 888173273Ssam return CONSUMED; 889173273Ssam } 890173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 891173273Ssam /* 892173273Ssam * Outside the BA window, but within range; 893173273Ssam * flush the reorder q and move the window. 894205277Srpaulo * Sec 9.10.7.6.2 b) (p.138) 895173273Ssam */ 896178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 897173273Ssam "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 898170530Ssam rap->rxa_start, 899173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 900170530Ssam rap->rxa_qframes, rxseq, tid); 901178354Ssam vap->iv_stats.is_ampdu_rx_move++; 902170530Ssam 903173273Ssam /* 904173273Ssam * The spec says to flush frames up to but not including: 905173273Ssam * WinStart_B = rxseq - rap->rxa_wnd + 1 906173273Ssam * Then insert the frame or notify the caller to process 907173273Ssam * it immediately. We can safely do this by just starting 908173273Ssam * over again because we know the frame will now be within 909173273Ssam * the BA window. 910173273Ssam */ 911173273Ssam /* NB: rxa_wnd known to be >0 */ 912173273Ssam ampdu_rx_flush_upto(ni, rap, 913173273Ssam IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 914173273Ssam goto again; 915170530Ssam } else { 916170530Ssam /* 917173273Ssam * Outside the BA window and out of range; toss. 918205277Srpaulo * Sec 9.10.7.6.2 c) (p.138) 919170530Ssam */ 920178354Ssam IEEE80211_DISCARD_MAC(vap, 921173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 922178354Ssam "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 923173273Ssam rap->rxa_start, 924173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 925173273Ssam rap->rxa_qframes, rxseq, tid, 926173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 927178354Ssam vap->iv_stats.is_ampdu_rx_drop++; 928173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 929170530Ssam m_freem(m); 930173273Ssam return CONSUMED; 931170530Ssam } 932173273Ssam#undef CONSUMED 933173273Ssam#undef PROCESS 934170530Ssam#undef IEEE80211_FC0_QOSDATA 935170530Ssam} 936170530Ssam 937170530Ssam/* 938170530Ssam * Process a BAR ctl frame. Dispatch all frames up to 939170530Ssam * the sequence number of the frame. If this frame is 940173273Ssam * out of range it's discarded. 941170530Ssam */ 942170530Ssamvoid 943170530Ssamieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 944170530Ssam{ 945178354Ssam struct ieee80211vap *vap = ni->ni_vap; 946170530Ssam struct ieee80211_frame_bar *wh; 947170530Ssam struct ieee80211_rx_ampdu *rap; 948170530Ssam ieee80211_seq rxseq; 949170530Ssam int tid, off; 950170530Ssam 951173273Ssam if (!ieee80211_recv_bar_ena) { 952173273Ssam#if 0 953178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 954173273Ssam ni->ni_macaddr, "BAR", "%s", "processing disabled"); 955173273Ssam#endif 956178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 957173273Ssam return; 958173273Ssam } 959170530Ssam wh = mtod(m0, struct ieee80211_frame_bar *); 960170530Ssam /* XXX check basic BAR */ 961170530Ssam tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 962170530Ssam rap = &ni->ni_rx_ampdu[tid]; 963170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 964170530Ssam /* 965170530Ssam * No ADDBA request yet, don't touch. 966170530Ssam */ 967178354Ssam IEEE80211_DISCARD_MAC(vap, 968170530Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 969170530Ssam ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 970178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 971170530Ssam return; 972170530Ssam } 973178354Ssam vap->iv_stats.is_ampdu_bar_rx++; 974170530Ssam rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 975173273Ssam if (rxseq == rap->rxa_start) 976173273Ssam return; 977170530Ssam /* calculate offset in BA window */ 978170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 979173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 980170530Ssam /* 981173273Ssam * Flush the reorder q up to rxseq and move the window. 982205277Srpaulo * Sec 9.10.7.6.3 a) (p.138) 983170530Ssam */ 984178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 985173273Ssam "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 986170530Ssam rap->rxa_start, 987173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 988173273Ssam rap->rxa_qframes, rxseq, tid); 989178354Ssam vap->iv_stats.is_ampdu_bar_move++; 990173273Ssam 991173273Ssam ampdu_rx_flush_upto(ni, rap, rxseq); 992173273Ssam if (off >= rap->rxa_wnd) { 993173273Ssam /* 994173273Ssam * BAR specifies a window start to the right of BA 995173273Ssam * window; we must move it explicitly since 996173273Ssam * ampdu_rx_flush_upto will not. 997173273Ssam */ 998173273Ssam rap->rxa_start = rxseq; 999170530Ssam } 1000173273Ssam } else { 1001170530Ssam /* 1002173273Ssam * Out of range; toss. 1003205277Srpaulo * Sec 9.10.7.6.3 b) (p.138) 1004170530Ssam */ 1005178354Ssam IEEE80211_DISCARD_MAC(vap, 1006173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1007173273Ssam "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1008173273Ssam rap->rxa_start, 1009173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1010173273Ssam rap->rxa_qframes, rxseq, tid, 1011173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1012178354Ssam vap->iv_stats.is_ampdu_bar_oow++; 1013173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 1014170530Ssam } 1015170530Ssam} 1016170530Ssam 1017170530Ssam/* 1018170530Ssam * Setup HT-specific state in a node. Called only 1019170530Ssam * when HT use is negotiated so we don't do extra 1020170530Ssam * work for temporary and/or legacy sta's. 1021170530Ssam */ 1022170530Ssamvoid 1023183254Ssamieee80211_ht_node_init(struct ieee80211_node *ni) 1024170530Ssam{ 1025170530Ssam struct ieee80211_tx_ampdu *tap; 1026234324Sadrian int tid; 1027170530Ssam 1028173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1029173273Ssam /* 1030173273Ssam * Clean AMPDU state on re-associate. This handles the case 1031173273Ssam * where a station leaves w/o notifying us and then returns 1032173273Ssam * before node is reaped for inactivity. 1033173273Ssam */ 1034173273Ssam ieee80211_ht_node_cleanup(ni); 1035173273Ssam } 1036234324Sadrian for (tid = 0; tid < WME_NUM_TID; tid++) { 1037234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 1038234324Sadrian tap->txa_tid = tid; 1039184280Ssam tap->txa_ni = ni; 1040173273Ssam /* NB: further initialization deferred */ 1041170530Ssam } 1042173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1043170530Ssam} 1044170530Ssam 1045170530Ssam/* 1046170530Ssam * Cleanup HT-specific state in a node. Called only 1047170530Ssam * when HT use has been marked. 1048170530Ssam */ 1049170530Ssamvoid 1050170530Ssamieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1051170530Ssam{ 1052191552Ssam struct ieee80211com *ic = ni->ni_ic; 1053170530Ssam int i; 1054170530Ssam 1055170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1056170530Ssam 1057170530Ssam /* XXX optimize this */ 1058234324Sadrian for (i = 0; i < WME_NUM_TID; i++) { 1059170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1060184280Ssam if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1061184280Ssam ampdu_tx_stop(tap); 1062170530Ssam } 1063170530Ssam for (i = 0; i < WME_NUM_TID; i++) 1064191552Ssam ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1065170530Ssam 1066170530Ssam ni->ni_htcap = 0; 1067182828Ssam ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1068170530Ssam} 1069170530Ssam 1070178354Ssam/* 1071178354Ssam * Age out HT resources for a station. 1072178354Ssam */ 1073178354Ssamvoid 1074178354Ssamieee80211_ht_node_age(struct ieee80211_node *ni) 1075178354Ssam{ 1076178354Ssam#ifdef IEEE80211_AMPDU_AGE 1077178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1078178354Ssam uint8_t tid; 1079178354Ssam#endif 1080178354Ssam 1081178354Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1082178354Ssam 1083178354Ssam#ifdef IEEE80211_AMPDU_AGE 1084178354Ssam for (tid = 0; tid < WME_NUM_TID; tid++) { 1085178354Ssam struct ieee80211_rx_ampdu *rap; 1086178354Ssam 1087178354Ssam rap = &ni->ni_rx_ampdu[tid]; 1088178354Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1089178354Ssam continue; 1090178354Ssam if (rap->rxa_qframes == 0) 1091178354Ssam continue; 1092178354Ssam /* 1093178354Ssam * Check for frames sitting too long in the reorder queue. 1094178354Ssam * See above for more details on what's happening here. 1095178354Ssam */ 1096178354Ssam /* XXX honor batimeout? */ 1097178354Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1098178354Ssam /* 1099178354Ssam * Too long since we received the first 1100178354Ssam * frame; flush the reorder buffer. 1101178354Ssam */ 1102178354Ssam vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1103178354Ssam ampdu_rx_flush(ni, rap); 1104178354Ssam } 1105178354Ssam } 1106178354Ssam#endif /* IEEE80211_AMPDU_AGE */ 1107178354Ssam} 1108178354Ssam 1109173273Ssamstatic struct ieee80211_channel * 1110173273Ssamfindhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1111173273Ssam{ 1112173273Ssam return ieee80211_find_channel(ic, c->ic_freq, 1113173273Ssam (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1114173273Ssam} 1115173273Ssam 1116173273Ssam/* 1117173273Ssam * Adjust a channel to be HT/non-HT according to the vap's configuration. 1118173273Ssam */ 1119173273Ssamstruct ieee80211_channel * 1120173273Ssamieee80211_ht_adjust_channel(struct ieee80211com *ic, 1121173273Ssam struct ieee80211_channel *chan, int flags) 1122173273Ssam{ 1123173273Ssam struct ieee80211_channel *c; 1124173273Ssam 1125193655Ssam if (flags & IEEE80211_FHT_HT) { 1126173273Ssam /* promote to HT if possible */ 1127193655Ssam if (flags & IEEE80211_FHT_USEHT40) { 1128173273Ssam if (!IEEE80211_IS_CHAN_HT40(chan)) { 1129173273Ssam /* NB: arbitrarily pick ht40+ over ht40- */ 1130173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1131173273Ssam if (c == NULL) 1132173273Ssam c = findhtchan(ic, chan, 1133173273Ssam IEEE80211_CHAN_HT40D); 1134173273Ssam if (c == NULL) 1135173273Ssam c = findhtchan(ic, chan, 1136173273Ssam IEEE80211_CHAN_HT20); 1137173273Ssam if (c != NULL) 1138173273Ssam chan = c; 1139173273Ssam } 1140173273Ssam } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1141173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1142173273Ssam if (c != NULL) 1143173273Ssam chan = c; 1144173273Ssam } 1145173273Ssam } else if (IEEE80211_IS_CHAN_HT(chan)) { 1146173273Ssam /* demote to legacy, HT use is disabled */ 1147173273Ssam c = ieee80211_find_channel(ic, chan->ic_freq, 1148173273Ssam chan->ic_flags &~ IEEE80211_CHAN_HT); 1149173273Ssam if (c != NULL) 1150173273Ssam chan = c; 1151173273Ssam } 1152173273Ssam return chan; 1153173273Ssam} 1154173273Ssam 1155173273Ssam/* 1156173273Ssam * Setup HT-specific state for a legacy WDS peer. 1157173273Ssam */ 1158173273Ssamvoid 1159173273Ssamieee80211_ht_wds_init(struct ieee80211_node *ni) 1160173273Ssam{ 1161178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1162173273Ssam struct ieee80211_tx_ampdu *tap; 1163234324Sadrian int tid; 1164173273Ssam 1165193655Ssam KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1166173273Ssam 1167173273Ssam /* XXX check scan cache in case peer has an ap and we have info */ 1168173273Ssam /* 1169173273Ssam * If setup with a legacy channel; locate an HT channel. 1170173273Ssam * Otherwise if the inherited channel (from a companion 1171173273Ssam * AP) is suitable use it so we use the same location 1172173273Ssam * for the extension channel). 1173173273Ssam */ 1174178354Ssam ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1175178354Ssam ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1176173273Ssam 1177173273Ssam ni->ni_htcap = 0; 1178193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1179173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1180173273Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1181173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1182173273Ssam ni->ni_chw = 40; 1183173273Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1184173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1185173273Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1186173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1187193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1188173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1189173273Ssam } else { 1190173273Ssam ni->ni_chw = 20; 1191173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1192173273Ssam } 1193173273Ssam ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1194193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1195183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1196183256Ssam /* XXX does it make sense to enable SMPS? */ 1197173273Ssam 1198173273Ssam ni->ni_htopmode = 0; /* XXX need protection state */ 1199173273Ssam ni->ni_htstbc = 0; /* XXX need info */ 1200173273Ssam 1201234324Sadrian for (tid = 0; tid < WME_NUM_TID; tid++) { 1202234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 1203234324Sadrian tap->txa_tid = tid; 1204173273Ssam } 1205193655Ssam /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1206173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1207173273Ssam} 1208173273Ssam 1209173273Ssam/* 1210173273Ssam * Notify hostap vaps of a change in the HTINFO ie. 1211173273Ssam */ 1212173273Ssamstatic void 1213173273Ssamhtinfo_notify(struct ieee80211com *ic) 1214173273Ssam{ 1215178354Ssam struct ieee80211vap *vap; 1216178354Ssam int first = 1; 1217178354Ssam 1218178354Ssam IEEE80211_LOCK_ASSERT(ic); 1219178354Ssam 1220178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1221178354Ssam if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1222178354Ssam continue; 1223183253Ssam if (vap->iv_state != IEEE80211_S_RUN || 1224183253Ssam !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1225183253Ssam continue; 1226178354Ssam if (first) { 1227178354Ssam IEEE80211_NOTE(vap, 1228178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1229178354Ssam vap->iv_bss, 1230178354Ssam "HT bss occupancy change: %d sta, %d ht, " 1231178354Ssam "%d ht40%s, HT protmode now 0x%x" 1232178354Ssam , ic->ic_sta_assoc 1233178354Ssam , ic->ic_ht_sta_assoc 1234178354Ssam , ic->ic_ht40_sta_assoc 1235193655Ssam , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1236178354Ssam ", non-HT sta present" : "" 1237178354Ssam , ic->ic_curhtprotmode); 1238178354Ssam first = 0; 1239178354Ssam } 1240178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1241178354Ssam } 1242173273Ssam} 1243173273Ssam 1244173273Ssam/* 1245173273Ssam * Calculate HT protection mode from current 1246173273Ssam * state and handle updates. 1247173273Ssam */ 1248173273Ssamstatic void 1249173273Ssamhtinfo_update(struct ieee80211com *ic) 1250173273Ssam{ 1251173273Ssam uint8_t protmode; 1252173273Ssam 1253178354Ssam if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1254178354Ssam protmode = IEEE80211_HTINFO_OPMODE_MIXED 1255178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1256193655Ssam } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) { 1257173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1258178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1259178354Ssam } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1260178354Ssam IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1261173273Ssam ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1262173273Ssam protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1263173273Ssam } else { 1264173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PURE; 1265173273Ssam } 1266173273Ssam if (protmode != ic->ic_curhtprotmode) { 1267173273Ssam ic->ic_curhtprotmode = protmode; 1268173273Ssam htinfo_notify(ic); 1269173273Ssam } 1270173273Ssam} 1271173273Ssam 1272173273Ssam/* 1273173273Ssam * Handle an HT station joining a BSS. 1274173273Ssam */ 1275173273Ssamvoid 1276173273Ssamieee80211_ht_node_join(struct ieee80211_node *ni) 1277173273Ssam{ 1278173273Ssam struct ieee80211com *ic = ni->ni_ic; 1279173273Ssam 1280173273Ssam IEEE80211_LOCK_ASSERT(ic); 1281173273Ssam 1282173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1283173273Ssam ic->ic_ht_sta_assoc++; 1284173273Ssam if (ni->ni_chw == 40) 1285173273Ssam ic->ic_ht40_sta_assoc++; 1286173273Ssam } 1287173273Ssam htinfo_update(ic); 1288173273Ssam} 1289173273Ssam 1290173273Ssam/* 1291173273Ssam * Handle an HT station leaving a BSS. 1292173273Ssam */ 1293173273Ssamvoid 1294173273Ssamieee80211_ht_node_leave(struct ieee80211_node *ni) 1295173273Ssam{ 1296173273Ssam struct ieee80211com *ic = ni->ni_ic; 1297173273Ssam 1298173273Ssam IEEE80211_LOCK_ASSERT(ic); 1299173273Ssam 1300173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1301173273Ssam ic->ic_ht_sta_assoc--; 1302173273Ssam if (ni->ni_chw == 40) 1303173273Ssam ic->ic_ht40_sta_assoc--; 1304173273Ssam } 1305173273Ssam htinfo_update(ic); 1306173273Ssam} 1307173273Ssam 1308173273Ssam/* 1309173273Ssam * Public version of htinfo_update; used for processing 1310178354Ssam * beacon frames from overlapping bss. 1311178354Ssam * 1312178354Ssam * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1313178354Ssam * (on receipt of a beacon that advertises MIXED) or 1314178354Ssam * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1315178354Ssam * from an overlapping legacy bss). We treat MIXED with 1316178354Ssam * a higher precedence than PROTOPT (i.e. we will not change 1317178354Ssam * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1318178354Ssam * corresponds to how we handle things in htinfo_update. 1319173273Ssam */ 1320173273Ssamvoid 1321178354Ssamieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1322173273Ssam{ 1323178354Ssam#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1324183246Ssam IEEE80211_LOCK(ic); 1325178354Ssam 1326178354Ssam /* track non-HT station presence */ 1327178354Ssam KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1328183246Ssam ("protmode 0x%x", protmode)); 1329193655Ssam ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR; 1330178354Ssam ic->ic_lastnonht = ticks; 1331178354Ssam 1332183246Ssam if (protmode != ic->ic_curhtprotmode && 1333183246Ssam (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1334183246Ssam OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1335183246Ssam /* push beacon update */ 1336183246Ssam ic->ic_curhtprotmode = protmode; 1337183246Ssam htinfo_notify(ic); 1338183246Ssam } 1339181197Ssam IEEE80211_UNLOCK(ic); 1340178354Ssam#undef OPMODE 1341173273Ssam} 1342173273Ssam 1343173273Ssam/* 1344173273Ssam * Time out presence of an overlapping bss with non-HT 1345173273Ssam * stations. When operating in hostap mode we listen for 1346173273Ssam * beacons from other stations and if we identify a non-HT 1347173273Ssam * station is present we update the opmode field of the 1348173273Ssam * HTINFO ie. To identify when all non-HT stations are 1349173273Ssam * gone we time out this condition. 1350173273Ssam */ 1351173273Ssamvoid 1352173273Ssamieee80211_ht_timeout(struct ieee80211com *ic) 1353173273Ssam{ 1354173273Ssam IEEE80211_LOCK_ASSERT(ic); 1355173273Ssam 1356193655Ssam if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) && 1357173273Ssam time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1358173273Ssam#if 0 1359178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1360173273Ssam "%s", "time out non-HT STA present on channel"); 1361173273Ssam#endif 1362193655Ssam ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1363173273Ssam htinfo_update(ic); 1364173273Ssam } 1365173273Ssam} 1366173273Ssam 1367170530Ssam/* unalligned little endian access */ 1368170530Ssam#define LE_READ_2(p) \ 1369170530Ssam ((uint16_t) \ 1370170530Ssam ((((const uint8_t *)(p))[0] ) | \ 1371170530Ssam (((const uint8_t *)(p))[1] << 8))) 1372170530Ssam 1373170530Ssam/* 1374170530Ssam * Process an 802.11n HT capabilities ie. 1375170530Ssam */ 1376170530Ssamvoid 1377170530Ssamieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1378170530Ssam{ 1379170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1380170530Ssam /* 1381170530Ssam * Station used Vendor OUI ie to associate; 1382170530Ssam * mark the node so when we respond we'll use 1383170530Ssam * the Vendor OUI's and not the standard ie's. 1384170530Ssam */ 1385170530Ssam ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1386170530Ssam ie += 4; 1387170530Ssam } else 1388170530Ssam ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1389170530Ssam 1390170530Ssam ni->ni_htcap = LE_READ_2(ie + 1391170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1392170530Ssam ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1393170530Ssam} 1394170530Ssam 1395183254Ssamstatic void 1396183254Ssamhtinfo_parse(struct ieee80211_node *ni, 1397183254Ssam const struct ieee80211_ie_htinfo *htinfo) 1398170530Ssam{ 1399170530Ssam uint16_t w; 1400170530Ssam 1401170530Ssam ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1402170530Ssam ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1403172055Ssam w = LE_READ_2(&htinfo->hi_byte2); 1404170530Ssam ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1405170530Ssam w = LE_READ_2(&htinfo->hi_byte45); 1406170530Ssam ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1407183254Ssam} 1408183254Ssam 1409183254Ssam/* 1410183254Ssam * Parse an 802.11n HT info ie and save useful information 1411183254Ssam * to the node state. Note this does not effect any state 1412183254Ssam * changes such as for channel width change. 1413183254Ssam */ 1414183254Ssamvoid 1415183254Ssamieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1416183254Ssam{ 1417183254Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1418183254Ssam ie += 4; 1419183254Ssam htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1420183254Ssam} 1421183254Ssam 1422183254Ssam/* 1423183254Ssam * Handle 11n channel switch. Use the received HT ie's to 1424183254Ssam * identify the right channel to use. If we cannot locate it 1425183254Ssam * in the channel table then fallback to legacy operation. 1426183254Ssam * Note that we use this information to identify the node's 1427183254Ssam * channel only; the caller is responsible for insuring any 1428183254Ssam * required channel change is done (e.g. in sta mode when 1429183254Ssam * parsing the contents of a beacon frame). 1430183254Ssam */ 1431233452Sadrianstatic int 1432183254Ssamhtinfo_update_chw(struct ieee80211_node *ni, int htflags) 1433183254Ssam{ 1434183254Ssam struct ieee80211com *ic = ni->ni_ic; 1435183254Ssam struct ieee80211_channel *c; 1436183254Ssam int chanflags; 1437233452Sadrian int ret = 0; 1438183254Ssam 1439173273Ssam chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1440173273Ssam if (chanflags != ni->ni_chan->ic_flags) { 1441183254Ssam /* XXX not right for ht40- */ 1442173273Ssam c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1443178354Ssam if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1444173273Ssam /* 1445173273Ssam * No HT40 channel entry in our table; fall back 1446173273Ssam * to HT20 operation. This should not happen. 1447173273Ssam */ 1448173273Ssam c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1449183254Ssam#if 0 1450183254Ssam IEEE80211_NOTE(ni->ni_vap, 1451173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1452173273Ssam "no HT40 channel (freq %u), falling back to HT20", 1453173273Ssam ni->ni_chan->ic_freq); 1454183254Ssam#endif 1455173273Ssam /* XXX stat */ 1456173273Ssam } 1457173273Ssam if (c != NULL && c != ni->ni_chan) { 1458183254Ssam IEEE80211_NOTE(ni->ni_vap, 1459173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1460173273Ssam "switch station to HT%d channel %u/0x%x", 1461173273Ssam IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1462173273Ssam c->ic_freq, c->ic_flags); 1463173273Ssam ni->ni_chan = c; 1464233452Sadrian ret = 1; 1465173273Ssam } 1466173273Ssam /* NB: caller responsible for forcing any channel change */ 1467173273Ssam } 1468173273Ssam /* update node's tx channel width */ 1469173273Ssam ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1470233452Sadrian return (ret); 1471170530Ssam} 1472170530Ssam 1473170530Ssam/* 1474183255Ssam * Update 11n MIMO PS state according to received htcap. 1475183255Ssam */ 1476183255Ssamstatic __inline int 1477183255Ssamhtcap_update_mimo_ps(struct ieee80211_node *ni) 1478183255Ssam{ 1479183255Ssam uint16_t oflags = ni->ni_flags; 1480183255Ssam 1481183255Ssam switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1482183255Ssam case IEEE80211_HTCAP_SMPS_DYNAMIC: 1483183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1484183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1485183255Ssam break; 1486183255Ssam case IEEE80211_HTCAP_SMPS_ENA: 1487183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1488183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1489183255Ssam break; 1490183255Ssam case IEEE80211_HTCAP_SMPS_OFF: 1491183255Ssam default: /* disable on rx of reserved value */ 1492183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1493183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1494183255Ssam break; 1495183255Ssam } 1496183255Ssam return (oflags ^ ni->ni_flags); 1497183255Ssam} 1498183255Ssam 1499183255Ssam/* 1500183257Ssam * Update short GI state according to received htcap 1501183257Ssam * and local settings. 1502183257Ssam */ 1503183257Ssamstatic __inline void 1504183257Ssamhtcap_update_shortgi(struct ieee80211_node *ni) 1505183257Ssam{ 1506183257Ssam struct ieee80211vap *vap = ni->ni_vap; 1507183257Ssam 1508183257Ssam ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1509183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1510193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1511183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI20; 1512183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1513193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1514183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI40; 1515183257Ssam} 1516183257Ssam 1517183257Ssam/* 1518183254Ssam * Parse and update HT-related state extracted from 1519183254Ssam * the HT cap and info ie's. 1520183254Ssam */ 1521233452Sadrianint 1522183254Ssamieee80211_ht_updateparams(struct ieee80211_node *ni, 1523183254Ssam const uint8_t *htcapie, const uint8_t *htinfoie) 1524183254Ssam{ 1525183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1526183254Ssam const struct ieee80211_ie_htinfo *htinfo; 1527183254Ssam int htflags; 1528233452Sadrian int ret = 0; 1529183254Ssam 1530183254Ssam ieee80211_parse_htcap(ni, htcapie); 1531183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1532183255Ssam htcap_update_mimo_ps(ni); 1533183257Ssam htcap_update_shortgi(ni); 1534183254Ssam 1535183254Ssam if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1536183254Ssam htinfoie += 4; 1537183254Ssam htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1538183254Ssam htinfo_parse(ni, htinfo); 1539183254Ssam 1540193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1541183254Ssam IEEE80211_CHAN_HT20 : 0; 1542183254Ssam /* NB: honor operating mode constraint */ 1543183254Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1544193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1545183254Ssam if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1546183254Ssam htflags = IEEE80211_CHAN_HT40U; 1547183254Ssam else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1548183254Ssam htflags = IEEE80211_CHAN_HT40D; 1549183254Ssam } 1550233452Sadrian if (htinfo_update_chw(ni, htflags)) 1551233452Sadrian ret = 1; 1552183256Ssam 1553183256Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1554193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1555183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1556183256Ssam else 1557183256Ssam ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1558233452Sadrian 1559233452Sadrian return (ret); 1560183254Ssam} 1561183254Ssam 1562183254Ssam/* 1563183254Ssam * Parse and update HT-related state extracted from the HT cap ie 1564183254Ssam * for a station joining an HT BSS. 1565183254Ssam */ 1566183254Ssamvoid 1567183254Ssamieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1568183254Ssam{ 1569183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1570183254Ssam int htflags; 1571183254Ssam 1572183254Ssam ieee80211_parse_htcap(ni, htcapie); 1573183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1574183255Ssam htcap_update_mimo_ps(ni); 1575183257Ssam htcap_update_shortgi(ni); 1576183254Ssam 1577183254Ssam /* NB: honor operating mode constraint */ 1578219606Sbschmidt /* XXX 40 MHz intolerant */ 1579193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1580183254Ssam IEEE80211_CHAN_HT20 : 0; 1581183254Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1582193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1583183254Ssam if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1584183254Ssam htflags = IEEE80211_CHAN_HT40U; 1585183254Ssam else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1586183254Ssam htflags = IEEE80211_CHAN_HT40D; 1587183254Ssam } 1588233452Sadrian (void) htinfo_update_chw(ni, htflags); 1589183254Ssam} 1590183254Ssam 1591183254Ssam/* 1592170530Ssam * Install received HT rate set by parsing the HT cap ie. 1593170530Ssam */ 1594170530Ssamint 1595170530Ssamieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1596170530Ssam{ 1597219602Sbschmidt struct ieee80211com *ic = ni->ni_ic; 1598178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1599170530Ssam const struct ieee80211_ie_htcap *htcap; 1600170530Ssam struct ieee80211_htrateset *rs; 1601219602Sbschmidt int i, maxequalmcs, maxunequalmcs; 1602170530Ssam 1603219602Sbschmidt maxequalmcs = ic->ic_txstream * 8 - 1; 1604219602Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 1605219602Sbschmidt if (ic->ic_txstream >= 2) 1606219602Sbschmidt maxunequalmcs = 38; 1607219602Sbschmidt if (ic->ic_txstream >= 3) 1608219602Sbschmidt maxunequalmcs = 52; 1609219602Sbschmidt if (ic->ic_txstream >= 4) 1610219602Sbschmidt maxunequalmcs = 76; 1611219602Sbschmidt } else 1612219602Sbschmidt maxunequalmcs = 0; 1613219602Sbschmidt 1614170530Ssam rs = &ni->ni_htrates; 1615170530Ssam memset(rs, 0, sizeof(*rs)); 1616170530Ssam if (ie != NULL) { 1617170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1618170530Ssam ie += 4; 1619170530Ssam htcap = (const struct ieee80211_ie_htcap *) ie; 1620170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1621170530Ssam if (isclr(htcap->hc_mcsset, i)) 1622170530Ssam continue; 1623170530Ssam if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1624178354Ssam IEEE80211_NOTE(vap, 1625170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1626170530Ssam "WARNING, HT rate set too large; only " 1627170530Ssam "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1628178354Ssam vap->iv_stats.is_rx_rstoobig++; 1629170530Ssam break; 1630170530Ssam } 1631219602Sbschmidt if (i <= 31 && i > maxequalmcs) 1632219602Sbschmidt continue; 1633219602Sbschmidt if (i == 32 && 1634219602Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 1635219602Sbschmidt continue; 1636219602Sbschmidt if (i > 32 && i > maxunequalmcs) 1637219602Sbschmidt continue; 1638170530Ssam rs->rs_rates[rs->rs_nrates++] = i; 1639170530Ssam } 1640170530Ssam } 1641170530Ssam return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1642170530Ssam} 1643170530Ssam 1644170530Ssam/* 1645170530Ssam * Mark rates in a node's HT rate set as basic according 1646170530Ssam * to the information in the supplied HT info ie. 1647170530Ssam */ 1648170530Ssamvoid 1649170530Ssamieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1650170530Ssam{ 1651170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1652170530Ssam struct ieee80211_htrateset *rs; 1653170530Ssam int i, j; 1654170530Ssam 1655170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1656170530Ssam ie += 4; 1657170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1658170530Ssam rs = &ni->ni_htrates; 1659170530Ssam if (rs->rs_nrates == 0) { 1660178354Ssam IEEE80211_NOTE(ni->ni_vap, 1661170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1662170530Ssam "%s", "WARNING, empty HT rate set"); 1663170530Ssam return; 1664170530Ssam } 1665170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1666170530Ssam if (isclr(htinfo->hi_basicmcsset, i)) 1667170530Ssam continue; 1668170530Ssam for (j = 0; j < rs->rs_nrates; j++) 1669170530Ssam if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1670170530Ssam rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1671170530Ssam } 1672170530Ssam} 1673170530Ssam 1674170530Ssamstatic void 1675184280Ssamampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 1676184280Ssam{ 1677184280Ssam callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1678184280Ssam tap->txa_flags |= IEEE80211_AGGR_SETUP; 1679184280Ssam} 1680184280Ssam 1681184280Ssamstatic void 1682184280Ssamampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 1683184280Ssam{ 1684184280Ssam struct ieee80211_node *ni = tap->txa_ni; 1685184280Ssam struct ieee80211com *ic = ni->ni_ic; 1686184280Ssam 1687184280Ssam KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 1688234324Sadrian ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid, 1689234324Sadrian TID_TO_WME_AC(tap->txa_tid))); 1690184280Ssam 1691184280Ssam /* 1692184280Ssam * Stop BA stream if setup so driver has a chance 1693184280Ssam * to reclaim any resources it might have allocated. 1694184280Ssam */ 1695184280Ssam ic->ic_addba_stop(ni, tap); 1696184280Ssam /* 1697184280Ssam * Stop any pending BAR transmit. 1698184280Ssam */ 1699184280Ssam bar_stop_timer(tap); 1700184280Ssam 1701184280Ssam tap->txa_lastsample = 0; 1702184280Ssam tap->txa_avgpps = 0; 1703184280Ssam /* NB: clearing NAK means we may re-send ADDBA */ 1704184280Ssam tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 1705184280Ssam} 1706184280Ssam 1707223331Sadrian/* 1708223331Sadrian * ADDBA response timeout. 1709223331Sadrian * 1710223331Sadrian * If software aggregation and per-TID queue management was done here, 1711223331Sadrian * that queue would be unpaused after the ADDBA timeout occurs. 1712223331Sadrian */ 1713184280Ssamstatic void 1714170530Ssamaddba_timeout(void *arg) 1715170530Ssam{ 1716170530Ssam struct ieee80211_tx_ampdu *tap = arg; 1717223331Sadrian struct ieee80211_node *ni = tap->txa_ni; 1718223331Sadrian struct ieee80211com *ic = ni->ni_ic; 1719170530Ssam 1720170530Ssam /* XXX ? */ 1721170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1722170530Ssam tap->txa_attempts++; 1723223331Sadrian ic->ic_addba_response_timeout(ni, tap); 1724170530Ssam} 1725170530Ssam 1726170530Ssamstatic void 1727170530Ssamaddba_start_timeout(struct ieee80211_tx_ampdu *tap) 1728170530Ssam{ 1729170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1730178354Ssam callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1731170530Ssam addba_timeout, tap); 1732170530Ssam tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1733178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1734170530Ssam} 1735170530Ssam 1736170530Ssamstatic void 1737170530Ssamaddba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1738170530Ssam{ 1739170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1740170530Ssam if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1741170530Ssam callout_stop(&tap->txa_timer); 1742170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1743170530Ssam } 1744170530Ssam} 1745170530Ssam 1746223331Sadrianstatic void 1747223331Sadriannull_addba_response_timeout(struct ieee80211_node *ni, 1748223331Sadrian struct ieee80211_tx_ampdu *tap) 1749223331Sadrian{ 1750223331Sadrian} 1751223331Sadrian 1752170530Ssam/* 1753170530Ssam * Default method for requesting A-MPDU tx aggregation. 1754170530Ssam * We setup the specified state block and start a timer 1755170530Ssam * to wait for an ADDBA response frame. 1756170530Ssam */ 1757170530Ssamstatic int 1758170530Ssamieee80211_addba_request(struct ieee80211_node *ni, 1759170530Ssam struct ieee80211_tx_ampdu *tap, 1760170530Ssam int dialogtoken, int baparamset, int batimeout) 1761170530Ssam{ 1762170530Ssam int bufsiz; 1763170530Ssam 1764170530Ssam /* XXX locking */ 1765170530Ssam tap->txa_token = dialogtoken; 1766170530Ssam tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1767170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1768170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1769170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1770170530Ssam addba_start_timeout(tap); 1771170530Ssam return 1; 1772170530Ssam} 1773170530Ssam 1774170530Ssam/* 1775170530Ssam * Default method for processing an A-MPDU tx aggregation 1776170530Ssam * response. We shutdown any pending timer and update the 1777170530Ssam * state block according to the reply. 1778170530Ssam */ 1779170530Ssamstatic int 1780170530Ssamieee80211_addba_response(struct ieee80211_node *ni, 1781170530Ssam struct ieee80211_tx_ampdu *tap, 1782170530Ssam int status, int baparamset, int batimeout) 1783170530Ssam{ 1784184280Ssam int bufsiz, tid; 1785170530Ssam 1786170530Ssam /* XXX locking */ 1787170530Ssam addba_stop_timeout(tap); 1788170530Ssam if (status == IEEE80211_STATUS_SUCCESS) { 1789170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1790170530Ssam /* XXX override our request? */ 1791170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1792170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1793184280Ssam /* XXX AC/TID */ 1794184280Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1795170530Ssam tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1796184280Ssam tap->txa_attempts = 0; 1797173273Ssam } else { 1798173273Ssam /* mark tid so we don't try again */ 1799173273Ssam tap->txa_flags |= IEEE80211_AGGR_NAK; 1800170530Ssam } 1801170530Ssam return 1; 1802170530Ssam} 1803170530Ssam 1804170530Ssam/* 1805170530Ssam * Default method for stopping A-MPDU tx aggregation. 1806170530Ssam * Any timer is cleared and we drain any pending frames. 1807170530Ssam */ 1808170530Ssamstatic void 1809170530Ssamieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1810170530Ssam{ 1811170530Ssam /* XXX locking */ 1812170530Ssam addba_stop_timeout(tap); 1813170530Ssam if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1814182830Ssam /* XXX clear aggregation queue */ 1815170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1816170530Ssam } 1817170530Ssam tap->txa_attempts = 0; 1818170530Ssam} 1819170530Ssam 1820170530Ssam/* 1821170530Ssam * Process a received action frame using the default aggregation 1822170530Ssam * policy. We intercept ADDBA-related frames and use them to 1823170530Ssam * update our aggregation state. All other frames are passed up 1824170530Ssam * for processing by ieee80211_recv_action. 1825170530Ssam */ 1826195377Ssamstatic int 1827195377Ssamht_recv_action_ba_addba_request(struct ieee80211_node *ni, 1828195377Ssam const struct ieee80211_frame *wh, 1829170530Ssam const uint8_t *frm, const uint8_t *efrm) 1830170530Ssam{ 1831170530Ssam struct ieee80211com *ic = ni->ni_ic; 1832178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1833170530Ssam struct ieee80211_rx_ampdu *rap; 1834195377Ssam uint8_t dialogtoken; 1835195377Ssam uint16_t baparamset, batimeout, baseqctl; 1836205277Srpaulo uint16_t args[5]; 1837195377Ssam int tid; 1838170530Ssam 1839195377Ssam dialogtoken = frm[2]; 1840195377Ssam baparamset = LE_READ_2(frm+3); 1841195377Ssam batimeout = LE_READ_2(frm+5); 1842195377Ssam baseqctl = LE_READ_2(frm+7); 1843170530Ssam 1844195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1845170530Ssam 1846195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1847195377Ssam "recv ADDBA request: dialogtoken %u baparamset 0x%x " 1848195377Ssam "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d", 1849195377Ssam dialogtoken, baparamset, 1850195377Ssam tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ), 1851195377Ssam batimeout, 1852195377Ssam MS(baseqctl, IEEE80211_BASEQ_START), 1853195377Ssam MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1854170530Ssam 1855195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1856170530Ssam 1857195377Ssam /* Send ADDBA response */ 1858195377Ssam args[0] = dialogtoken; 1859195377Ssam /* 1860195377Ssam * NB: We ack only if the sta associated with HT and 1861195377Ssam * the ap is configured to do AMPDU rx (the latter 1862195377Ssam * violates the 11n spec and is mostly for testing). 1863195377Ssam */ 1864195377Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1865195377Ssam (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 1866195377Ssam /* XXX handle ampdu_rx_start failure */ 1867195377Ssam ic->ic_ampdu_rx_start(ni, rap, 1868195377Ssam baparamset, batimeout, baseqctl); 1869170530Ssam 1870195377Ssam args[1] = IEEE80211_STATUS_SUCCESS; 1871195377Ssam } else { 1872195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1873195377Ssam ni, "reject ADDBA request: %s", 1874195377Ssam ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1875195377Ssam "administratively disabled" : 1876195377Ssam "not negotiated for station"); 1877195377Ssam vap->iv_stats.is_addba_reject++; 1878195377Ssam args[1] = IEEE80211_STATUS_UNSPECIFIED; 1879195377Ssam } 1880195377Ssam /* XXX honor rap flags? */ 1881195377Ssam args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1882195377Ssam | SM(tid, IEEE80211_BAPS_TID) 1883195377Ssam | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1884195377Ssam ; 1885195377Ssam args[3] = 0; 1886205277Srpaulo args[4] = 0; 1887195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1888195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1889195377Ssam return 0; 1890195377Ssam} 1891170530Ssam 1892195377Ssamstatic int 1893195377Ssamht_recv_action_ba_addba_response(struct ieee80211_node *ni, 1894195377Ssam const struct ieee80211_frame *wh, 1895195377Ssam const uint8_t *frm, const uint8_t *efrm) 1896195377Ssam{ 1897195377Ssam struct ieee80211com *ic = ni->ni_ic; 1898195377Ssam struct ieee80211vap *vap = ni->ni_vap; 1899195377Ssam struct ieee80211_tx_ampdu *tap; 1900195377Ssam uint8_t dialogtoken, policy; 1901195377Ssam uint16_t baparamset, batimeout, code; 1902234324Sadrian int tid, bufsiz; 1903170530Ssam 1904195377Ssam dialogtoken = frm[2]; 1905195377Ssam code = LE_READ_2(frm+3); 1906195377Ssam baparamset = LE_READ_2(frm+5); 1907195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1908195377Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1909195377Ssam policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1910195377Ssam batimeout = LE_READ_2(frm+7); 1911195377Ssam 1912234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 1913195377Ssam if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1914195377Ssam IEEE80211_DISCARD_MAC(vap, 1915195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1916195377Ssam ni->ni_macaddr, "ADDBA response", 1917195377Ssam "no pending ADDBA, tid %d dialogtoken %u " 1918195377Ssam "code %d", tid, dialogtoken, code); 1919195377Ssam vap->iv_stats.is_addba_norequest++; 1920195377Ssam return 0; 1921195377Ssam } 1922195377Ssam if (dialogtoken != tap->txa_token) { 1923195377Ssam IEEE80211_DISCARD_MAC(vap, 1924195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1925195377Ssam ni->ni_macaddr, "ADDBA response", 1926195377Ssam "dialogtoken mismatch: waiting for %d, " 1927195377Ssam "received %d, tid %d code %d", 1928195377Ssam tap->txa_token, dialogtoken, tid, code); 1929195377Ssam vap->iv_stats.is_addba_badtoken++; 1930195377Ssam return 0; 1931195377Ssam } 1932195377Ssam /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1933195377Ssam if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1934195377Ssam IEEE80211_DISCARD_MAC(vap, 1935195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1936195377Ssam ni->ni_macaddr, "ADDBA response", 1937195377Ssam "policy mismatch: expecting %s, " 1938195377Ssam "received %s, tid %d code %d", 1939195377Ssam tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1940195377Ssam policy, tid, code); 1941195377Ssam vap->iv_stats.is_addba_badpolicy++; 1942195377Ssam return 0; 1943195377Ssam } 1944182829Ssam#if 0 1945195377Ssam /* XXX we take MIN in ieee80211_addba_response */ 1946195377Ssam if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1947195377Ssam IEEE80211_DISCARD_MAC(vap, 1948195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1949195377Ssam ni->ni_macaddr, "ADDBA response", 1950195377Ssam "BA window too large: max %d, " 1951195377Ssam "received %d, tid %d code %d", 1952195377Ssam bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1953195377Ssam vap->iv_stats.is_addba_badbawinsize++; 1954195377Ssam return 0; 1955195377Ssam } 1956182829Ssam#endif 1957195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1958195377Ssam "recv ADDBA response: dialogtoken %u code %d " 1959195377Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1960195377Ssam dialogtoken, code, baparamset, tid, bufsiz, 1961195377Ssam batimeout); 1962195377Ssam ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 1963195377Ssam return 0; 1964195377Ssam} 1965170530Ssam 1966195377Ssamstatic int 1967195377Ssamht_recv_action_ba_delba(struct ieee80211_node *ni, 1968195377Ssam const struct ieee80211_frame *wh, 1969195377Ssam const uint8_t *frm, const uint8_t *efrm) 1970195377Ssam{ 1971195377Ssam struct ieee80211com *ic = ni->ni_ic; 1972195377Ssam struct ieee80211_rx_ampdu *rap; 1973195377Ssam struct ieee80211_tx_ampdu *tap; 1974195377Ssam uint16_t baparamset, code; 1975234324Sadrian int tid; 1976170530Ssam 1977195377Ssam baparamset = LE_READ_2(frm+2); 1978195377Ssam code = LE_READ_2(frm+4); 1979170530Ssam 1980195377Ssam tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1981170530Ssam 1982195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1983195377Ssam "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1984195377Ssam "code %d", baparamset, tid, 1985195377Ssam MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1986195377Ssam 1987195377Ssam if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1988234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 1989195377Ssam ic->ic_addba_stop(ni, tap); 1990195377Ssam } else { 1991195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1992195377Ssam ic->ic_ampdu_rx_stop(ni, rap); 1993170530Ssam } 1994195377Ssam return 0; 1995170530Ssam} 1996170530Ssam 1997195377Ssamstatic int 1998195377Ssamht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 1999195377Ssam const struct ieee80211_frame *wh, 2000170530Ssam const uint8_t *frm, const uint8_t *efrm) 2001170530Ssam{ 2002170530Ssam int chw; 2003170530Ssam 2004195377Ssam chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 2005195377Ssam 2006195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2007195377Ssam "%s: HT txchwidth, width %d%s", 2008195377Ssam __func__, chw, ni->ni_chw != chw ? "*" : ""); 2009195377Ssam if (chw != ni->ni_chw) { 2010195377Ssam ni->ni_chw = chw; 2011195377Ssam /* XXX notify on change */ 2012170530Ssam } 2013195377Ssam return 0; 2014170530Ssam} 2015170530Ssam 2016195377Ssamstatic int 2017195377Ssamht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 2018195377Ssam const struct ieee80211_frame *wh, 2019195377Ssam const uint8_t *frm, const uint8_t *efrm) 2020195377Ssam{ 2021195377Ssam const struct ieee80211_action_ht_mimopowersave *mps = 2022195377Ssam (const struct ieee80211_action_ht_mimopowersave *) frm; 2023195377Ssam 2024195377Ssam /* XXX check iv_htcaps */ 2025195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2026195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2027195377Ssam else 2028195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2029195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2030195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2031195377Ssam else 2032195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2033195377Ssam /* XXX notify on change */ 2034195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2035195377Ssam "%s: HT MIMO PS (%s%s)", __func__, 2036195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2037195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2038195377Ssam ); 2039195377Ssam return 0; 2040195377Ssam} 2041195377Ssam 2042170530Ssam/* 2043170530Ssam * Transmit processing. 2044170530Ssam */ 2045170530Ssam 2046170530Ssam/* 2047178354Ssam * Check if A-MPDU should be requested/enabled for a stream. 2048178354Ssam * We require a traffic rate above a per-AC threshold and we 2049178354Ssam * also handle backoff from previous failed attempts. 2050178354Ssam * 2051178354Ssam * Drivers may override this method to bring in information 2052178354Ssam * such as link state conditions in making the decision. 2053178354Ssam */ 2054178354Ssamstatic int 2055178354Ssamieee80211_ampdu_enable(struct ieee80211_node *ni, 2056178354Ssam struct ieee80211_tx_ampdu *tap) 2057178354Ssam{ 2058178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2059178354Ssam 2060234324Sadrian if (tap->txa_avgpps < 2061234324Sadrian vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)]) 2062178354Ssam return 0; 2063178354Ssam /* XXX check rssi? */ 2064178354Ssam if (tap->txa_attempts >= ieee80211_addba_maxtries && 2065178354Ssam ticks < tap->txa_nextrequest) { 2066178354Ssam /* 2067178354Ssam * Don't retry too often; txa_nextrequest is set 2068178354Ssam * to the minimum interval we'll retry after 2069178354Ssam * ieee80211_addba_maxtries failed attempts are made. 2070178354Ssam */ 2071178354Ssam return 0; 2072178354Ssam } 2073178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2074234324Sadrian "enable AMPDU on tid %d (%s), avgpps %d pkts %d", 2075234324Sadrian tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)], 2076234324Sadrian tap->txa_avgpps, tap->txa_pkts); 2077178354Ssam return 1; 2078178354Ssam} 2079178354Ssam 2080178354Ssam/* 2081170530Ssam * Request A-MPDU tx aggregation. Setup local state and 2082170530Ssam * issue an ADDBA request. BA use will only happen after 2083170530Ssam * the other end replies with ADDBA response. 2084170530Ssam */ 2085170530Ssamint 2086170530Ssamieee80211_ampdu_request(struct ieee80211_node *ni, 2087170530Ssam struct ieee80211_tx_ampdu *tap) 2088170530Ssam{ 2089170530Ssam struct ieee80211com *ic = ni->ni_ic; 2090205277Srpaulo uint16_t args[5]; 2091170530Ssam int tid, dialogtoken; 2092170530Ssam static int tokens = 0; /* XXX */ 2093170530Ssam 2094170530Ssam /* XXX locking */ 2095170530Ssam if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2096170530Ssam /* do deferred setup of state */ 2097184280Ssam ampdu_tx_setup(tap); 2098170530Ssam } 2099173273Ssam /* XXX hack for not doing proper locking */ 2100173273Ssam tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2101173273Ssam 2102170530Ssam dialogtoken = (tokens+1) % 63; /* XXX */ 2103234324Sadrian tid = tap->txa_tid; 2104183245Ssam tap->txa_start = ni->ni_txseqs[tid]; 2105170530Ssam 2106170530Ssam args[0] = dialogtoken; 2107205277Srpaulo args[1] = 0; /* NB: status code not used */ 2108205277Srpaulo args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2109170530Ssam | SM(tid, IEEE80211_BAPS_TID) 2110170530Ssam | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 2111170530Ssam ; 2112205277Srpaulo args[3] = 0; /* batimeout */ 2113170530Ssam /* NB: do first so there's no race against reply */ 2114205277Srpaulo if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2115170530Ssam /* unable to setup state, don't make request */ 2116178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2117234324Sadrian ni, "%s: could not setup BA stream for TID %d AC %d", 2118234324Sadrian __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid)); 2119173273Ssam /* defer next try so we don't slam the driver with requests */ 2120178354Ssam tap->txa_attempts = ieee80211_addba_maxtries; 2121178354Ssam /* NB: check in case driver wants to override */ 2122178354Ssam if (tap->txa_nextrequest <= ticks) 2123178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2124170530Ssam return 0; 2125170530Ssam } 2126170530Ssam tokens = dialogtoken; /* allocate token */ 2127183245Ssam /* NB: after calling ic_addba_request so driver can set txa_start */ 2128205277Srpaulo args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START) 2129178953Ssam | SM(0, IEEE80211_BASEQ_FRAG) 2130178953Ssam ; 2131170530Ssam return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2132170530Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2133170530Ssam} 2134170530Ssam 2135170530Ssam/* 2136173273Ssam * Terminate an AMPDU tx stream. State is reclaimed 2137173273Ssam * and the peer notified with a DelBA Action frame. 2138173273Ssam */ 2139173273Ssamvoid 2140183250Ssamieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2141183250Ssam int reason) 2142173273Ssam{ 2143173273Ssam struct ieee80211com *ic = ni->ni_ic; 2144178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2145173273Ssam uint16_t args[4]; 2146173273Ssam 2147173273Ssam /* XXX locking */ 2148184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2149173273Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 2150178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2151234324Sadrian ni, "%s: stop BA stream for TID %d (reason %d)", 2152234324Sadrian __func__, tap->txa_tid, reason); 2153178354Ssam vap->iv_stats.is_ampdu_stop++; 2154173273Ssam 2155173273Ssam ic->ic_addba_stop(ni, tap); 2156234324Sadrian args[0] = tap->txa_tid; 2157173273Ssam args[1] = IEEE80211_DELBAPS_INIT; 2158183250Ssam args[2] = reason; /* XXX reason code */ 2159195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2160173273Ssam IEEE80211_ACTION_BA_DELBA, args); 2161173273Ssam } else { 2162178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2163234324Sadrian ni, "%s: BA stream for TID %d not running (reason %d)", 2164234324Sadrian __func__, tap->txa_tid, reason); 2165178354Ssam vap->iv_stats.is_ampdu_stop_failed++; 2166173273Ssam } 2167173273Ssam} 2168173273Ssam 2169235801Sadrian/* XXX */ 2170235801Sadrianstatic void bar_start_timer(struct ieee80211_tx_ampdu *tap); 2171235801Sadrian 2172184280Ssamstatic void 2173184280Ssambar_timeout(void *arg) 2174184280Ssam{ 2175184280Ssam struct ieee80211_tx_ampdu *tap = arg; 2176184280Ssam struct ieee80211_node *ni = tap->txa_ni; 2177184280Ssam 2178184280Ssam KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2179184280Ssam ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2180184280Ssam 2181184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2182184280Ssam ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2183234324Sadrian tap->txa_tid, tap->txa_flags, tap->txa_attempts); 2184184280Ssam 2185184280Ssam /* guard against race with bar_tx_complete */ 2186184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2187184280Ssam return; 2188184280Ssam /* XXX ? */ 2189234018Sadrian if (tap->txa_attempts >= ieee80211_bar_maxtries) { 2190235801Sadrian struct ieee80211com *ic = ni->ni_ic; 2191235801Sadrian 2192234018Sadrian ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++; 2193235801Sadrian /* 2194235801Sadrian * If (at least) the last BAR TX timeout was due to 2195235801Sadrian * an ieee80211_send_bar() failures, then we need 2196235801Sadrian * to make sure we notify the driver that a BAR 2197235801Sadrian * TX did occur and fail. This gives the driver 2198235801Sadrian * a chance to undo any queue pause that may 2199235801Sadrian * have occured. 2200235801Sadrian */ 2201235801Sadrian ic->ic_bar_response(ni, tap, 1); 2202184280Ssam ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2203234018Sadrian } else { 2204234018Sadrian ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++; 2205235801Sadrian if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) { 2206235801Sadrian /* 2207235801Sadrian * If ieee80211_send_bar() fails here, the 2208235801Sadrian * timer may have stopped and/or the pending 2209235801Sadrian * flag may be clear. Because of this, 2210235801Sadrian * fake the BARPEND and reset the timer. 2211235801Sadrian * A retransmission attempt will then occur 2212235801Sadrian * during the next timeout. 2213235801Sadrian */ 2214235801Sadrian /* XXX locking */ 2215235801Sadrian tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2216235801Sadrian bar_start_timer(tap); 2217235801Sadrian } 2218234018Sadrian } 2219184280Ssam} 2220184280Ssam 2221184280Ssamstatic void 2222184280Ssambar_start_timer(struct ieee80211_tx_ampdu *tap) 2223184280Ssam{ 2224184280Ssam callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2225184280Ssam} 2226184280Ssam 2227184280Ssamstatic void 2228184280Ssambar_stop_timer(struct ieee80211_tx_ampdu *tap) 2229184280Ssam{ 2230184280Ssam callout_stop(&tap->txa_timer); 2231184280Ssam} 2232184280Ssam 2233184280Ssamstatic void 2234184280Ssambar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2235184280Ssam{ 2236184280Ssam struct ieee80211_tx_ampdu *tap = arg; 2237184280Ssam 2238184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2239184280Ssam ni, "%s: tid %u flags 0x%x pending %d status %d", 2240234324Sadrian __func__, tap->txa_tid, tap->txa_flags, 2241184280Ssam callout_pending(&tap->txa_timer), status); 2242184280Ssam 2243234018Sadrian ni->ni_vap->iv_stats.is_ampdu_bar_tx++; 2244184280Ssam /* XXX locking */ 2245184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2246184280Ssam callout_pending(&tap->txa_timer)) { 2247184280Ssam struct ieee80211com *ic = ni->ni_ic; 2248184280Ssam 2249224907Sadrian if (status == 0) /* ACK'd */ 2250184280Ssam bar_stop_timer(tap); 2251184280Ssam ic->ic_bar_response(ni, tap, status); 2252184280Ssam /* NB: just let timer expire so we pace requests */ 2253184280Ssam } 2254184280Ssam} 2255184280Ssam 2256184280Ssamstatic void 2257184280Ssamieee80211_bar_response(struct ieee80211_node *ni, 2258184280Ssam struct ieee80211_tx_ampdu *tap, int status) 2259184280Ssam{ 2260184280Ssam 2261224907Sadrian if (status == 0) { /* got ACK */ 2262184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2263184280Ssam ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2264184280Ssam tap->txa_start, 2265184280Ssam IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2266184280Ssam tap->txa_qframes, tap->txa_seqpending, 2267234324Sadrian tap->txa_tid); 2268184280Ssam 2269184280Ssam /* NB: timer already stopped in bar_tx_complete */ 2270184280Ssam tap->txa_start = tap->txa_seqpending; 2271184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2272184280Ssam } 2273184280Ssam} 2274184280Ssam 2275173273Ssam/* 2276170530Ssam * Transmit a BAR frame to the specified node. The 2277170530Ssam * BAR contents are drawn from the supplied aggregation 2278170530Ssam * state associated with the node. 2279184280Ssam * 2280184280Ssam * NB: we only handle immediate ACK w/ compressed bitmap. 2281170530Ssam */ 2282170530Ssamint 2283170530Ssamieee80211_send_bar(struct ieee80211_node *ni, 2284184280Ssam struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2285170530Ssam{ 2286178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2287178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2288170530Ssam struct ieee80211com *ic = ni->ni_ic; 2289184280Ssam struct ieee80211_frame_bar *bar; 2290170530Ssam struct mbuf *m; 2291184280Ssam uint16_t barctl, barseqctl; 2292170530Ssam uint8_t *frm; 2293170530Ssam int tid, ret; 2294170530Ssam 2295184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2296184280Ssam /* no ADDBA response, should not happen */ 2297184280Ssam /* XXX stat+msg */ 2298184280Ssam return EINVAL; 2299184280Ssam } 2300184280Ssam /* XXX locking */ 2301184280Ssam bar_stop_timer(tap); 2302184280Ssam 2303170530Ssam ieee80211_ref_node(ni); 2304170530Ssam 2305184280Ssam m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2306170530Ssam if (m == NULL) 2307170530Ssam senderr(ENOMEM, is_tx_nobuf); 2308170530Ssam 2309184280Ssam if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2310184280Ssam m_freem(m); 2311184280Ssam senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2312184280Ssam /* NOTREACHED */ 2313184280Ssam } 2314184280Ssam 2315184280Ssam bar = mtod(m, struct ieee80211_frame_bar *); 2316184280Ssam bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2317170530Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2318184280Ssam bar->i_fc[1] = 0; 2319184280Ssam IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2320184280Ssam IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2321170530Ssam 2322234324Sadrian tid = tap->txa_tid; 2323170530Ssam barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2324184280Ssam 0 : IEEE80211_BAR_NOACK) 2325184280Ssam | IEEE80211_BAR_COMP 2326184280Ssam | SM(tid, IEEE80211_BAR_TID) 2327170530Ssam ; 2328184280Ssam barseqctl = SM(seq, IEEE80211_BAR_SEQ_START); 2329184280Ssam /* NB: known to have proper alignment */ 2330184280Ssam bar->i_ctl = htole16(barctl); 2331184280Ssam bar->i_seq = htole16(barseqctl); 2332184280Ssam m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2333170530Ssam 2334178354Ssam M_WME_SETAC(m, WME_AC_VO); 2335178354Ssam 2336170530Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2337170530Ssam 2338184280Ssam /* XXX locking */ 2339184280Ssam /* init/bump attempts counter */ 2340184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2341184280Ssam tap->txa_attempts = 1; 2342184280Ssam else 2343184280Ssam tap->txa_attempts++; 2344184280Ssam tap->txa_seqpending = seq; 2345184280Ssam tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2346170530Ssam 2347184280Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2348184280Ssam ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2349184280Ssam tid, barctl, seq, tap->txa_attempts); 2350184280Ssam 2351225013Sadrian /* 2352225013Sadrian * ic_raw_xmit will free the node reference 2353225013Sadrian * regardless of queue/TX success or failure. 2354225013Sadrian */ 2355184280Ssam ret = ic->ic_raw_xmit(ni, m, NULL); 2356184280Ssam if (ret != 0) { 2357184280Ssam /* xmit failed, clear state flag */ 2358184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2359234018Sadrian vap->iv_stats.is_ampdu_bar_tx_fail++; 2360225013Sadrian return ret; 2361184280Ssam } 2362184280Ssam /* XXX hack against tx complete happening before timer is started */ 2363184280Ssam if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2364184280Ssam bar_start_timer(tap); 2365184280Ssam return 0; 2366170530Ssambad: 2367234018Sadrian vap->iv_stats.is_ampdu_bar_tx_fail++; 2368170530Ssam ieee80211_free_node(ni); 2369170530Ssam return ret; 2370170530Ssam#undef senderr 2371170530Ssam} 2372170530Ssam 2373195377Ssamstatic int 2374195377Ssamht_action_output(struct ieee80211_node *ni, struct mbuf *m) 2375195377Ssam{ 2376195377Ssam struct ieee80211_bpf_params params; 2377195377Ssam 2378195377Ssam memset(¶ms, 0, sizeof(params)); 2379195377Ssam params.ibp_pri = WME_AC_VO; 2380195377Ssam params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2381195377Ssam /* NB: we know all frames are unicast */ 2382195377Ssam params.ibp_try0 = ni->ni_txparms->maxretry; 2383195377Ssam params.ibp_power = ni->ni_txpower; 2384195377Ssam return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2385195377Ssam ¶ms); 2386195377Ssam} 2387195377Ssam 2388195377Ssam#define ADDSHORT(frm, v) do { \ 2389195377Ssam frm[0] = (v) & 0xff; \ 2390195377Ssam frm[1] = (v) >> 8; \ 2391195377Ssam frm += 2; \ 2392195377Ssam} while (0) 2393195377Ssam 2394170530Ssam/* 2395170530Ssam * Send an action management frame. The arguments are stuff 2396170530Ssam * into a frame without inspection; the caller is assumed to 2397170530Ssam * prepare them carefully (e.g. based on the aggregation state). 2398170530Ssam */ 2399195377Ssamstatic int 2400195377Ssamht_send_action_ba_addba(struct ieee80211_node *ni, 2401195377Ssam int category, int action, void *arg0) 2402170530Ssam{ 2403178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2404170530Ssam struct ieee80211com *ic = ni->ni_ic; 2405195377Ssam uint16_t *args = arg0; 2406170530Ssam struct mbuf *m; 2407170530Ssam uint8_t *frm; 2408195377Ssam 2409195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2410205277Srpaulo "send ADDBA %s: dialogtoken %d status %d " 2411195377Ssam "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 2412195377Ssam (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 2413195377Ssam "request" : "response", 2414205277Srpaulo args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), 2415205277Srpaulo args[3], args[4]); 2416195377Ssam 2417195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2418195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2419195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2420195377Ssam ieee80211_ref_node(ni); 2421195377Ssam 2422195377Ssam m = ieee80211_getmgtframe(&frm, 2423195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2424195377Ssam sizeof(uint16_t) /* action+category */ 2425195377Ssam /* XXX may action payload */ 2426195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2427195377Ssam ); 2428195377Ssam if (m != NULL) { 2429195377Ssam *frm++ = category; 2430195377Ssam *frm++ = action; 2431195377Ssam *frm++ = args[0]; /* dialog token */ 2432205277Srpaulo if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 2433205277Srpaulo ADDSHORT(frm, args[1]); /* status code */ 2434205277Srpaulo ADDSHORT(frm, args[2]); /* baparamset */ 2435205277Srpaulo ADDSHORT(frm, args[3]); /* batimeout */ 2436195377Ssam if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 2437205277Srpaulo ADDSHORT(frm, args[4]); /* baseqctl */ 2438195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2439195377Ssam return ht_action_output(ni, m); 2440195377Ssam } else { 2441195377Ssam vap->iv_stats.is_tx_nobuf++; 2442195377Ssam ieee80211_free_node(ni); 2443195377Ssam return ENOMEM; 2444195377Ssam } 2445195377Ssam} 2446195377Ssam 2447195377Ssamstatic int 2448195377Ssamht_send_action_ba_delba(struct ieee80211_node *ni, 2449195377Ssam int category, int action, void *arg0) 2450195377Ssam{ 2451195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2452195377Ssam struct ieee80211com *ic = ni->ni_ic; 2453195377Ssam uint16_t *args = arg0; 2454195377Ssam struct mbuf *m; 2455170530Ssam uint16_t baparamset; 2456195377Ssam uint8_t *frm; 2457170530Ssam 2458195377Ssam baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2459195377Ssam | args[1] 2460195377Ssam ; 2461195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2462195377Ssam "send DELBA action: tid %d, initiator %d reason %d", 2463195377Ssam args[0], args[1], args[2]); 2464170530Ssam 2465178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2466195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2467195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2468170530Ssam ieee80211_ref_node(ni); 2469170530Ssam 2470170530Ssam m = ieee80211_getmgtframe(&frm, 2471195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2472195377Ssam sizeof(uint16_t) /* action+category */ 2473195377Ssam /* XXX may action payload */ 2474195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2475170530Ssam ); 2476195377Ssam if (m != NULL) { 2477195377Ssam *frm++ = category; 2478195377Ssam *frm++ = action; 2479195377Ssam ADDSHORT(frm, baparamset); 2480195377Ssam ADDSHORT(frm, args[2]); /* reason code */ 2481195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2482195377Ssam return ht_action_output(ni, m); 2483195377Ssam } else { 2484195377Ssam vap->iv_stats.is_tx_nobuf++; 2485195377Ssam ieee80211_free_node(ni); 2486195377Ssam return ENOMEM; 2487195377Ssam } 2488195377Ssam} 2489170530Ssam 2490195377Ssamstatic int 2491195377Ssamht_send_action_ht_txchwidth(struct ieee80211_node *ni, 2492195377Ssam int category, int action, void *arg0) 2493195377Ssam{ 2494195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2495195377Ssam struct ieee80211com *ic = ni->ni_ic; 2496195377Ssam struct mbuf *m; 2497195377Ssam uint8_t *frm; 2498170530Ssam 2499195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2500195377Ssam "send HT txchwidth: width %d", 2501195377Ssam IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 2502170530Ssam 2503195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2504195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2505195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2506195377Ssam ieee80211_ref_node(ni); 2507170530Ssam 2508195377Ssam m = ieee80211_getmgtframe(&frm, 2509195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2510195377Ssam sizeof(uint16_t) /* action+category */ 2511195377Ssam /* XXX may action payload */ 2512195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2513195377Ssam ); 2514195377Ssam if (m != NULL) { 2515195377Ssam *frm++ = category; 2516195377Ssam *frm++ = action; 2517195377Ssam *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2518195377Ssam IEEE80211_A_HT_TXCHWIDTH_2040 : 2519195377Ssam IEEE80211_A_HT_TXCHWIDTH_20; 2520195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2521195377Ssam return ht_action_output(ni, m); 2522195377Ssam } else { 2523195377Ssam vap->iv_stats.is_tx_nobuf++; 2524195377Ssam ieee80211_free_node(ni); 2525195377Ssam return ENOMEM; 2526170530Ssam } 2527195377Ssam} 2528170530Ssam#undef ADDSHORT 2529170530Ssam 2530170530Ssam/* 2531219600Sbschmidt * Construct the MCS bit mask for inclusion in an HT capabilities 2532219600Sbschmidt * information element. 2533170530Ssam */ 2534219600Sbschmidtstatic void 2535219600Sbschmidtieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 2536170530Ssam{ 2537170530Ssam int i; 2538219600Sbschmidt uint8_t txparams; 2539170530Ssam 2540219600Sbschmidt KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 2541219600Sbschmidt ("ic_rxstream %d out of range", ic->ic_rxstream)); 2542219600Sbschmidt KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 2543219600Sbschmidt ("ic_txstream %d out of range", ic->ic_txstream)); 2544219600Sbschmidt 2545219600Sbschmidt for (i = 0; i < ic->ic_rxstream * 8; i++) 2546219600Sbschmidt setbit(frm, i); 2547219600Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 2548219600Sbschmidt (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 2549219600Sbschmidt setbit(frm, 32); 2550219600Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 2551219600Sbschmidt if (ic->ic_rxstream >= 2) { 2552219600Sbschmidt for (i = 33; i <= 38; i++) 2553219600Sbschmidt setbit(frm, i); 2554170530Ssam } 2555219600Sbschmidt if (ic->ic_rxstream >= 3) { 2556219600Sbschmidt for (i = 39; i <= 52; i++) 2557219600Sbschmidt setbit(frm, i); 2558219600Sbschmidt } 2559219600Sbschmidt if (ic->ic_txstream >= 4) { 2560219600Sbschmidt for (i = 53; i <= 76; i++) 2561219600Sbschmidt setbit(frm, i); 2562219600Sbschmidt } 2563170530Ssam } 2564219600Sbschmidt 2565219600Sbschmidt if (ic->ic_rxstream != ic->ic_txstream) { 2566219600Sbschmidt txparams = 0x1; /* TX MCS set defined */ 2567219600Sbschmidt txparams |= 0x2; /* TX RX MCS not equal */ 2568219600Sbschmidt txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 2569219600Sbschmidt if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 2570219600Sbschmidt txparams |= 0x16; /* TX unequal modulation sup */ 2571219600Sbschmidt } else 2572219600Sbschmidt txparams = 0; 2573219600Sbschmidt frm[12] = txparams; 2574170530Ssam} 2575170530Ssam 2576170530Ssam/* 2577170530Ssam * Add body of an HTCAP information element. 2578170530Ssam */ 2579170530Ssamstatic uint8_t * 2580170530Ssamieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2581170530Ssam{ 2582170530Ssam#define ADDSHORT(frm, v) do { \ 2583170530Ssam frm[0] = (v) & 0xff; \ 2584170530Ssam frm[1] = (v) >> 8; \ 2585170530Ssam frm += 2; \ 2586170530Ssam} while (0) 2587222683Sbschmidt struct ieee80211com *ic = ni->ni_ic; 2588178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2589205513Srpaulo uint16_t caps, extcaps; 2590173865Ssam int rxmax, density; 2591170530Ssam 2592170530Ssam /* HT capabilities */ 2593178354Ssam caps = vap->iv_htcaps & 0xffff; 2594173273Ssam /* 2595173273Ssam * Note channel width depends on whether we are operating as 2596173273Ssam * a sta or not. When operating as a sta we are generating 2597173273Ssam * a request based on our desired configuration. Otherwise 2598173273Ssam * we are operational and the channel attributes identify 2599173273Ssam * how we've been setup (which might be different if a fixed 2600173273Ssam * channel is specified). 2601173273Ssam */ 2602178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 2603173273Ssam /* override 20/40 use based on config */ 2604193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 2605173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2606173273Ssam else 2607173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2608173865Ssam /* use advertised setting (XXX locally constraint) */ 2609173865Ssam rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 2610173865Ssam density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 2611222683Sbschmidt 2612222683Sbschmidt /* 2613222683Sbschmidt * NB: Hardware might support HT40 on some but not all 2614222683Sbschmidt * channels. We can't determine this earlier because only 2615222683Sbschmidt * after association the channel is upgraded to HT based 2616222683Sbschmidt * on the negotiated capabilities. 2617222683Sbschmidt */ 2618222683Sbschmidt if (ni->ni_chan != IEEE80211_CHAN_ANYC && 2619222683Sbschmidt findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL && 2620222683Sbschmidt findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL) 2621222683Sbschmidt caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2622173273Ssam } else { 2623173273Ssam /* override 20/40 use based on current channel */ 2624178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2625173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2626173273Ssam else 2627173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2628178354Ssam rxmax = vap->iv_ampdu_rxmax; 2629178354Ssam density = vap->iv_ampdu_density; 2630173273Ssam } 2631170530Ssam /* adjust short GI based on channel and config */ 2632193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 2633170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI20; 2634193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 2635170530Ssam (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2636170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI40; 2637170530Ssam ADDSHORT(frm, caps); 2638170530Ssam 2639170530Ssam /* HT parameters */ 2640173865Ssam *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2641173865Ssam | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2642173273Ssam ; 2643170530Ssam frm++; 2644170530Ssam 2645170530Ssam /* pre-zero remainder of ie */ 2646170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2647170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2648170530Ssam 2649170530Ssam /* supported MCS set */ 2650173273Ssam /* 2651219600Sbschmidt * XXX: For sta mode the rate set should be restricted based 2652219600Sbschmidt * on the AP's capabilities, but ni_htrates isn't setup when 2653219600Sbschmidt * we're called to form an AssocReq frame so for now we're 2654219600Sbschmidt * restricted to the device capabilities. 2655173273Ssam */ 2656219600Sbschmidt ieee80211_set_mcsset(ni->ni_ic, frm); 2657170530Ssam 2658205513Srpaulo frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 2659205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2660205513Srpaulo 2661205513Srpaulo /* HT extended capabilities */ 2662205513Srpaulo extcaps = vap->iv_htextcaps & 0xffff; 2663205513Srpaulo 2664205513Srpaulo ADDSHORT(frm, extcaps); 2665205513Srpaulo 2666170530Ssam frm += sizeof(struct ieee80211_ie_htcap) - 2667205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_txbf); 2668205513Srpaulo 2669170530Ssam return frm; 2670170530Ssam#undef ADDSHORT 2671170530Ssam} 2672170530Ssam 2673170530Ssam/* 2674170530Ssam * Add 802.11n HT capabilities information element 2675170530Ssam */ 2676170530Ssamuint8_t * 2677170530Ssamieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2678170530Ssam{ 2679170530Ssam frm[0] = IEEE80211_ELEMID_HTCAP; 2680170530Ssam frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2681170530Ssam return ieee80211_add_htcap_body(frm + 2, ni); 2682170530Ssam} 2683170530Ssam 2684170530Ssam/* 2685170530Ssam * Add Broadcom OUI wrapped standard HTCAP ie; this is 2686170530Ssam * used for compatibility w/ pre-draft implementations. 2687170530Ssam */ 2688170530Ssamuint8_t * 2689170530Ssamieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2690170530Ssam{ 2691170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2692170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2693170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2694170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2695170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2696170530Ssam frm[5] = BCM_OUI_HTCAP; 2697170530Ssam return ieee80211_add_htcap_body(frm + 6, ni); 2698170530Ssam} 2699170530Ssam 2700170530Ssam/* 2701170530Ssam * Construct the MCS bit mask of basic rates 2702170530Ssam * for inclusion in an HT information element. 2703170530Ssam */ 2704170530Ssamstatic void 2705170530Ssamieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2706170530Ssam{ 2707170530Ssam int i; 2708170530Ssam 2709170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2710170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2711170530Ssam if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2712170530Ssam r < IEEE80211_HTRATE_MAXSIZE) { 2713170530Ssam /* NB: this assumes a particular implementation */ 2714170530Ssam setbit(frm, r); 2715170530Ssam } 2716170530Ssam } 2717170530Ssam} 2718170530Ssam 2719170530Ssam/* 2720172211Ssam * Update the HTINFO ie for a beacon frame. 2721172211Ssam */ 2722172211Ssamvoid 2723178354Ssamieee80211_ht_update_beacon(struct ieee80211vap *vap, 2724172211Ssam struct ieee80211_beacon_offsets *bo) 2725172211Ssam{ 2726172211Ssam#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2727178354Ssam const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2728178354Ssam struct ieee80211com *ic = vap->iv_ic; 2729172211Ssam struct ieee80211_ie_htinfo *ht = 2730172211Ssam (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2731172211Ssam 2732172211Ssam /* XXX only update on channel change */ 2733178354Ssam ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2734193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2735183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 2736183256Ssam else 2737183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2738178354Ssam if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2739172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2740178354Ssam else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2741172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2742172211Ssam else 2743172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2744178354Ssam if (IEEE80211_IS_CHAN_HT40(bsschan)) 2745172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2746172211Ssam 2747172211Ssam /* protection mode */ 2748172211Ssam ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2749172211Ssam 2750172211Ssam /* XXX propagate to vendor ie's */ 2751172211Ssam#undef PROTMODE 2752172211Ssam} 2753172211Ssam 2754172211Ssam/* 2755170530Ssam * Add body of an HTINFO information element. 2756173273Ssam * 2757173273Ssam * NB: We don't use struct ieee80211_ie_htinfo because we can 2758173273Ssam * be called to fillin both a standard ie and a compat ie that 2759173273Ssam * has a vendor OUI at the front. 2760170530Ssam */ 2761170530Ssamstatic uint8_t * 2762170530Ssamieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2763170530Ssam{ 2764183256Ssam struct ieee80211vap *vap = ni->ni_vap; 2765170530Ssam struct ieee80211com *ic = ni->ni_ic; 2766170530Ssam 2767170530Ssam /* pre-zero remainder of ie */ 2768170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2769170530Ssam 2770170530Ssam /* primary/control channel center */ 2771178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2772170530Ssam 2773193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2774183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 2775183256Ssam else 2776183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2777178354Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2778170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2779178354Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2780170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2781170530Ssam else 2782170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2783178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2784170530Ssam frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2785170530Ssam 2786172211Ssam frm[1] = ic->ic_curhtprotmode; 2787170530Ssam 2788170530Ssam frm += 5; 2789170530Ssam 2790170530Ssam /* basic MCS set */ 2791170530Ssam ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2792170530Ssam frm += sizeof(struct ieee80211_ie_htinfo) - 2793170530Ssam __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2794170530Ssam return frm; 2795170530Ssam} 2796170530Ssam 2797170530Ssam/* 2798170530Ssam * Add 802.11n HT information information element. 2799170530Ssam */ 2800170530Ssamuint8_t * 2801170530Ssamieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2802170530Ssam{ 2803170530Ssam frm[0] = IEEE80211_ELEMID_HTINFO; 2804170530Ssam frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2805170530Ssam return ieee80211_add_htinfo_body(frm + 2, ni); 2806170530Ssam} 2807170530Ssam 2808170530Ssam/* 2809170530Ssam * Add Broadcom OUI wrapped standard HTINFO ie; this is 2810170530Ssam * used for compatibility w/ pre-draft implementations. 2811170530Ssam */ 2812170530Ssamuint8_t * 2813170530Ssamieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2814170530Ssam{ 2815170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2816170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2817170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2818170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2819170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2820170530Ssam frm[5] = BCM_OUI_HTINFO; 2821170530Ssam return ieee80211_add_htinfo_body(frm + 6, ni); 2822170530Ssam} 2823