1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29#ifdef __FreeBSD__ 30__FBSDID("$FreeBSD$"); 31#endif 32 33/* 34 * IEEE 802.11n protocol support. 35 */ 36 37#include "opt_inet.h" 38#include "opt_wlan.h" 39 40#include <sys/param.h> 41#include <sys/kernel.h> 42#include <sys/malloc.h> 43#include <sys/systm.h> 44#include <sys/endian.h> 45 46#include <sys/socket.h> 47 48#include <net/if.h> 49#include <net/if_var.h> 50#include <net/if_media.h> 51#include <net/ethernet.h> 52 53#include <net80211/ieee80211_var.h> 54#include <net80211/ieee80211_action.h> 55#include <net80211/ieee80211_input.h> 56 57const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = { 58 { 13, 14, 27, 30 }, /* MCS 0 */ 59 { 26, 29, 54, 60 }, /* MCS 1 */ 60 { 39, 43, 81, 90 }, /* MCS 2 */ 61 { 52, 58, 108, 120 }, /* MCS 3 */ 62 { 78, 87, 162, 180 }, /* MCS 4 */ 63 { 104, 116, 216, 240 }, /* MCS 5 */ 64 { 117, 130, 243, 270 }, /* MCS 6 */ 65 { 130, 144, 270, 300 }, /* MCS 7 */ 66 { 26, 29, 54, 60 }, /* MCS 8 */ 67 { 52, 58, 108, 120 }, /* MCS 9 */ 68 { 78, 87, 162, 180 }, /* MCS 10 */ 69 { 104, 116, 216, 240 }, /* MCS 11 */ 70 { 156, 173, 324, 360 }, /* MCS 12 */ 71 { 208, 231, 432, 480 }, /* MCS 13 */ 72 { 234, 260, 486, 540 }, /* MCS 14 */ 73 { 260, 289, 540, 600 }, /* MCS 15 */ 74 { 39, 43, 81, 90 }, /* MCS 16 */ 75 { 78, 87, 162, 180 }, /* MCS 17 */ 76 { 117, 130, 243, 270 }, /* MCS 18 */ 77 { 156, 173, 324, 360 }, /* MCS 19 */ 78 { 234, 260, 486, 540 }, /* MCS 20 */ 79 { 312, 347, 648, 720 }, /* MCS 21 */ 80 { 351, 390, 729, 810 }, /* MCS 22 */ 81 { 390, 433, 810, 900 }, /* MCS 23 */ 82 { 52, 58, 108, 120 }, /* MCS 24 */ 83 { 104, 116, 216, 240 }, /* MCS 25 */ 84 { 156, 173, 324, 360 }, /* MCS 26 */ 85 { 208, 231, 432, 480 }, /* MCS 27 */ 86 { 312, 347, 648, 720 }, /* MCS 28 */ 87 { 416, 462, 864, 960 }, /* MCS 29 */ 88 { 468, 520, 972, 1080 }, /* MCS 30 */ 89 { 520, 578, 1080, 1200 }, /* MCS 31 */ 90 { 0, 0, 12, 13 }, /* MCS 32 */ 91 { 78, 87, 162, 180 }, /* MCS 33 */ 92 { 104, 116, 216, 240 }, /* MCS 34 */ 93 { 130, 144, 270, 300 }, /* MCS 35 */ 94 { 117, 130, 243, 270 }, /* MCS 36 */ 95 { 156, 173, 324, 360 }, /* MCS 37 */ 96 { 195, 217, 405, 450 }, /* MCS 38 */ 97 { 104, 116, 216, 240 }, /* MCS 39 */ 98 { 130, 144, 270, 300 }, /* MCS 40 */ 99 { 130, 144, 270, 300 }, /* MCS 41 */ 100 { 156, 173, 324, 360 }, /* MCS 42 */ 101 { 182, 202, 378, 420 }, /* MCS 43 */ 102 { 182, 202, 378, 420 }, /* MCS 44 */ 103 { 208, 231, 432, 480 }, /* MCS 45 */ 104 { 156, 173, 324, 360 }, /* MCS 46 */ 105 { 195, 217, 405, 450 }, /* MCS 47 */ 106 { 195, 217, 405, 450 }, /* MCS 48 */ 107 { 234, 260, 486, 540 }, /* MCS 49 */ 108 { 273, 303, 567, 630 }, /* MCS 50 */ 109 { 273, 303, 567, 630 }, /* MCS 51 */ 110 { 312, 347, 648, 720 }, /* MCS 52 */ 111 { 130, 144, 270, 300 }, /* MCS 53 */ 112 { 156, 173, 324, 360 }, /* MCS 54 */ 113 { 182, 202, 378, 420 }, /* MCS 55 */ 114 { 156, 173, 324, 360 }, /* MCS 56 */ 115 { 182, 202, 378, 420 }, /* MCS 57 */ 116 { 208, 231, 432, 480 }, /* MCS 58 */ 117 { 234, 260, 486, 540 }, /* MCS 59 */ 118 { 208, 231, 432, 480 }, /* MCS 60 */ 119 { 234, 260, 486, 540 }, /* MCS 61 */ 120 { 260, 289, 540, 600 }, /* MCS 62 */ 121 { 260, 289, 540, 600 }, /* MCS 63 */ 122 { 286, 318, 594, 660 }, /* MCS 64 */ 123 { 195, 217, 405, 450 }, /* MCS 65 */ 124 { 234, 260, 486, 540 }, /* MCS 66 */ 125 { 273, 303, 567, 630 }, /* MCS 67 */ 126 { 234, 260, 486, 540 }, /* MCS 68 */ 127 { 273, 303, 567, 630 }, /* MCS 69 */ 128 { 312, 347, 648, 720 }, /* MCS 70 */ 129 { 351, 390, 729, 810 }, /* MCS 71 */ 130 { 312, 347, 648, 720 }, /* MCS 72 */ 131 { 351, 390, 729, 810 }, /* MCS 73 */ 132 { 390, 433, 810, 900 }, /* MCS 74 */ 133 { 390, 433, 810, 900 }, /* MCS 75 */ 134 { 429, 477, 891, 990 }, /* MCS 76 */ 135}; 136 137static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 138SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW, 139 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I", 140 "AMPDU max reorder age (ms)"); 141 142static int ieee80211_recv_bar_ena = 1; 143SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena, 144 0, "BAR frame processing (ena/dis)"); 145 146static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */ 147SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW, 148 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I", 149 "ADDBA request timeout (ms)"); 150static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */ 151SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW, 152 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I", 153 "ADDBA request backoff (ms)"); 154static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */ 155SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW, 156 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 157 158static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 159static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 160 161static ieee80211_recv_action_func ht_recv_action_ba_addba_request; 162static ieee80211_recv_action_func ht_recv_action_ba_addba_response; 163static ieee80211_recv_action_func ht_recv_action_ba_delba; 164static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave; 165static ieee80211_recv_action_func ht_recv_action_ht_txchwidth; 166 167static ieee80211_send_action_func ht_send_action_ba_addba; 168static ieee80211_send_action_func ht_send_action_ba_delba; 169static ieee80211_send_action_func ht_send_action_ht_txchwidth; 170 171static void 172ieee80211_ht_init(void) 173{ 174 /* 175 * Setup HT parameters that depends on the clock frequency. 176 */ 177 ieee80211_ampdu_age = msecs_to_ticks(500); 178 ieee80211_addba_timeout = msecs_to_ticks(250); 179 ieee80211_addba_backoff = msecs_to_ticks(10*1000); 180 ieee80211_bar_timeout = msecs_to_ticks(250); 181 /* 182 * Register action frame handlers. 183 */ 184 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 185 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 186 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 187 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 189 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 191 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 193 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 194 195 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 196 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 197 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 198 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 200 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 202 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 203} 204SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 205 206static int ieee80211_ampdu_enable(struct ieee80211_node *ni, 207 struct ieee80211_tx_ampdu *tap); 208static int ieee80211_addba_request(struct ieee80211_node *ni, 209 struct ieee80211_tx_ampdu *tap, 210 int dialogtoken, int baparamset, int batimeout); 211static int ieee80211_addba_response(struct ieee80211_node *ni, 212 struct ieee80211_tx_ampdu *tap, 213 int code, int baparamset, int batimeout); 214static void ieee80211_addba_stop(struct ieee80211_node *ni, 215 struct ieee80211_tx_ampdu *tap); 216static void null_addba_response_timeout(struct ieee80211_node *ni, 217 struct ieee80211_tx_ampdu *tap); 218 219static void ieee80211_bar_response(struct ieee80211_node *ni, 220 struct ieee80211_tx_ampdu *tap, int status); 221static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 222static void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 223static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 224 int baparamset, int batimeout, int baseqctl); 225static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 226 227void 228ieee80211_ht_attach(struct ieee80211com *ic) 229{ 230 /* setup default aggregation policy */ 231 ic->ic_recv_action = ieee80211_recv_action; 232 ic->ic_send_action = ieee80211_send_action; 233 ic->ic_ampdu_enable = ieee80211_ampdu_enable; 234 ic->ic_addba_request = ieee80211_addba_request; 235 ic->ic_addba_response = ieee80211_addba_response; 236 ic->ic_addba_response_timeout = null_addba_response_timeout; 237 ic->ic_addba_stop = ieee80211_addba_stop; 238 ic->ic_bar_response = ieee80211_bar_response; 239 ic->ic_ampdu_rx_start = ampdu_rx_start; 240 ic->ic_ampdu_rx_stop = ampdu_rx_stop; 241 242 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 243 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 244} 245 246void 247ieee80211_ht_detach(struct ieee80211com *ic) 248{ 249} 250 251void 252ieee80211_ht_vattach(struct ieee80211vap *vap) 253{ 254 255 /* driver can override defaults */ 256 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 257 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 258 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 259 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 260 /* tx aggregation traffic thresholds */ 261 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 262 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 263 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 264 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 265 266 vap->iv_htprotmode = IEEE80211_PROT_RTSCTS; 267 vap->iv_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 268 269 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 270 /* 271 * Device is HT capable; enable all HT-related 272 * facilities by default. 273 * XXX these choices may be too aggressive. 274 */ 275 vap->iv_flags_ht |= IEEE80211_FHT_HT 276 | IEEE80211_FHT_HTCOMPAT 277 ; 278 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 279 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 280 /* XXX infer from channel list? */ 281 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 282 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 283 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 284 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 285 } 286 /* enable RIFS if capable */ 287 if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 288 vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 289 290 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 291 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 292 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 293 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 294 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 295 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 296 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 297 298 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC) 299 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX; 300 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC) 301 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX; 302 303 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC) 304 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX; 305 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC) 306 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX; 307 } 308 /* NB: disable default legacy WDS, too many issues right now */ 309 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 310 vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 311} 312 313void 314ieee80211_ht_vdetach(struct ieee80211vap *vap) 315{ 316} 317 318static int 319ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode, 320 int ratetype) 321{ 322 int mword, rate; 323 324 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode); 325 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 326 return (0); 327 switch (ratetype) { 328 case 0: 329 rate = ieee80211_htrates[index].ht20_rate_800ns; 330 break; 331 case 1: 332 rate = ieee80211_htrates[index].ht20_rate_400ns; 333 break; 334 case 2: 335 rate = ieee80211_htrates[index].ht40_rate_800ns; 336 break; 337 default: 338 rate = ieee80211_htrates[index].ht40_rate_400ns; 339 break; 340 } 341 return (rate); 342} 343 344static struct printranges { 345 int minmcs; 346 int maxmcs; 347 int txstream; 348 int ratetype; 349 int htcapflags; 350} ranges[] = { 351 { 0, 7, 1, 0, 0 }, 352 { 8, 15, 2, 0, 0 }, 353 { 16, 23, 3, 0, 0 }, 354 { 24, 31, 4, 0, 0 }, 355 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 356 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 357 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 358 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 359 { 0, 0, 0, 0, 0 }, 360}; 361 362static void 363ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype) 364{ 365 int minrate, maxrate; 366 struct printranges *range; 367 368 for (range = ranges; range->txstream != 0; range++) { 369 if (ic->ic_txstream < range->txstream) 370 continue; 371 if (range->htcapflags && 372 (ic->ic_htcaps & range->htcapflags) == 0) 373 continue; 374 if (ratetype < range->ratetype) 375 continue; 376 minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 377 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 378 if (range->maxmcs) { 379 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 380 range->minmcs, range->maxmcs, 381 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 382 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 383 } else { 384 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs, 385 minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 386 } 387 } 388} 389 390static void 391ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode) 392{ 393 const char *modestr = ieee80211_phymode_name[mode]; 394 395 ic_printf(ic, "%s MCS 20MHz\n", modestr); 396 ht_rateprint(ic, mode, 0); 397 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 398 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr); 399 ht_rateprint(ic, mode, 1); 400 } 401 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 402 ic_printf(ic, "%s MCS 40MHz:\n", modestr); 403 ht_rateprint(ic, mode, 2); 404 } 405 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 406 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 407 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr); 408 ht_rateprint(ic, mode, 3); 409 } 410} 411 412void 413ieee80211_ht_announce(struct ieee80211com *ic) 414{ 415 416 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 417 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 418 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 419 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 420 ht_announce(ic, IEEE80211_MODE_11NA); 421 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 422 ht_announce(ic, IEEE80211_MODE_11NG); 423} 424 425void 426ieee80211_init_suphtrates(struct ieee80211com *ic) 427{ 428#define ADDRATE(x) do { \ 429 htrateset->rs_rates[htrateset->rs_nrates] = x; \ 430 htrateset->rs_nrates++; \ 431} while (0) 432 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates; 433 int i; 434 435 memset(htrateset, 0, sizeof(struct ieee80211_htrateset)); 436 for (i = 0; i < ic->ic_txstream * 8; i++) 437 ADDRATE(i); 438 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 439 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 440 ADDRATE(32); 441 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 442 if (ic->ic_txstream >= 2) { 443 for (i = 33; i <= 38; i++) 444 ADDRATE(i); 445 } 446 if (ic->ic_txstream >= 3) { 447 for (i = 39; i <= 52; i++) 448 ADDRATE(i); 449 } 450 if (ic->ic_txstream == 4) { 451 for (i = 53; i <= 76; i++) 452 ADDRATE(i); 453 } 454 } 455#undef ADDRATE 456} 457 458/* 459 * Receive processing. 460 */ 461 462/* 463 * Decap the encapsulated A-MSDU frames and dispatch all but 464 * the last for delivery. The last frame is returned for 465 * delivery via the normal path. 466 */ 467struct mbuf * 468ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 469{ 470 struct ieee80211vap *vap = ni->ni_vap; 471 int framelen; 472 struct mbuf *n; 473 474 /* discard 802.3 header inserted by ieee80211_decap */ 475 m_adj(m, sizeof(struct ether_header)); 476 477 vap->iv_stats.is_amsdu_decap++; 478 479 for (;;) { 480 /* 481 * Decap the first frame, bust it apart from the 482 * remainder and deliver. We leave the last frame 483 * delivery to the caller (for consistency with other 484 * code paths, could also do it here). 485 */ 486 m = ieee80211_decap1(m, &framelen); 487 if (m == NULL) { 488 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 489 ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 490 vap->iv_stats.is_amsdu_tooshort++; 491 return NULL; 492 } 493 if (m->m_pkthdr.len == framelen) 494 break; 495 n = m_split(m, framelen, M_NOWAIT); 496 if (n == NULL) { 497 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 498 ni->ni_macaddr, "a-msdu", 499 "%s", "unable to split encapsulated frames"); 500 vap->iv_stats.is_amsdu_split++; 501 m_freem(m); /* NB: must reclaim */ 502 return NULL; 503 } 504 vap->iv_deliver_data(vap, ni, m); 505 506 /* 507 * Remove frame contents; each intermediate frame 508 * is required to be aligned to a 4-byte boundary. 509 */ 510 m = n; 511 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 512 } 513 return m; /* last delivered by caller */ 514} 515 516static void 517ampdu_rx_purge_slot(struct ieee80211_rx_ampdu *rap, int i) 518{ 519 struct mbuf *m; 520 521 /* Walk the queue, removing frames as appropriate */ 522 while (mbufq_len(&rap->rxa_mq[i]) != 0) { 523 m = mbufq_dequeue(&rap->rxa_mq[i]); 524 if (m == NULL) 525 break; 526 rap->rxa_qbytes -= m->m_pkthdr.len; 527 rap->rxa_qframes--; 528 m_freem(m); 529 } 530} 531 532/* 533 * Add the given frame to the current RX reorder slot. 534 * 535 * For future offloaded A-MSDU handling where multiple frames with 536 * the same sequence number show up here, this routine will append 537 * those frames as long as they're appropriately tagged. 538 */ 539static int 540ampdu_rx_add_slot(struct ieee80211_rx_ampdu *rap, int off, int tid, 541 ieee80211_seq rxseq, 542 struct ieee80211_node *ni, 543 struct mbuf *m, 544 const struct ieee80211_rx_stats *rxs) 545{ 546 const struct ieee80211_rx_stats *rxs_final = NULL; 547 struct ieee80211vap *vap = ni->ni_vap; 548 int toss_dup; 549#define PROCESS 0 /* caller should process frame */ 550#define CONSUMED 1 /* frame consumed, caller does nothing */ 551 552 /* 553 * Figure out if this is a duplicate frame for the given slot. 554 * 555 * We're assuming that the driver will hand us all the frames 556 * for a given AMSDU decap pass and if we get /a/ frame 557 * for an AMSDU decap then we'll get all of them. 558 * 559 * The tricksy bit is that we don't know when the /end/ of 560 * the decap pass is, because we aren't tracking state here 561 * per-slot to know that we've finished receiving the frame list. 562 * 563 * The driver sets RX_F_AMSDU and RX_F_AMSDU_MORE to tell us 564 * what's going on; so ideally we'd just check the frame at the 565 * end of the reassembly slot to see if its F_AMSDU w/ no F_AMSDU_MORE - 566 * that means we've received the whole AMSDU decap pass. 567 */ 568 569 /* 570 * Get the rxs of the final mbuf in the slot, if one exists. 571 */ 572 if (mbufq_len(&rap->rxa_mq[off]) != 0) { 573 rxs_final = ieee80211_get_rx_params_ptr(mbufq_last(&rap->rxa_mq[off])); 574 } 575 576 /* Default to tossing the duplicate frame */ 577 toss_dup = 1; 578 579 /* 580 * Check to see if the final frame has F_AMSDU and F_AMSDU set, AND 581 * this frame has F_AMSDU set (MORE or otherwise.) That's a sign 582 * that more can come. 583 */ 584 585 if ((rxs != NULL) && (rxs_final != NULL) && 586 ieee80211_check_rxseq_amsdu(rxs) && 587 ieee80211_check_rxseq_amsdu(rxs_final)) { 588 if (! ieee80211_check_rxseq_amsdu_more(rxs_final)) { 589 /* 590 * amsdu_more() returning 0 means "it's not the 591 * final frame" so we can append more 592 * frames here. 593 */ 594 toss_dup = 0; 595 } 596 } 597 598 /* 599 * If the list is empty OR we have determined we can put more 600 * driver decap'ed AMSDU frames in here, then insert. 601 */ 602 if ((mbufq_len(&rap->rxa_mq[off]) == 0) || (toss_dup == 0)) { 603 if (mbufq_enqueue(&rap->rxa_mq[off], m) != 0) { 604 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 605 ni->ni_macaddr, 606 "a-mpdu queue fail", 607 "seqno %u tid %u BA win <%u:%u> off=%d, qlen=%d, maxqlen=%d", 608 rxseq, tid, rap->rxa_start, 609 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 610 off, 611 mbufq_len(&rap->rxa_mq[off]), 612 rap->rxa_mq[off].mq_maxlen); 613 /* XXX error count */ 614 m_freem(m); 615 return CONSUMED; 616 } 617 rap->rxa_qframes++; 618 rap->rxa_qbytes += m->m_pkthdr.len; 619 vap->iv_stats.is_ampdu_rx_reorder++; 620 /* 621 * Statistics for AMSDU decap. 622 */ 623 if (rxs != NULL && ieee80211_check_rxseq_amsdu(rxs)) { 624 if (ieee80211_check_rxseq_amsdu_more(rxs)) { 625 /* more=1, AMSDU, end of batch */ 626 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end); 627 } else { 628 IEEE80211_NODE_STAT(ni, rx_amsdu_more); 629 } 630 } 631 } else { 632 IEEE80211_DISCARD_MAC(vap, 633 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 634 ni->ni_macaddr, "a-mpdu duplicate", 635 "seqno %u tid %u BA win <%u:%u>", 636 rxseq, tid, rap->rxa_start, 637 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 638 if (rxs != NULL) { 639 IEEE80211_DISCARD_MAC(vap, 640 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 641 ni->ni_macaddr, "a-mpdu duplicate", 642 "seqno %d tid %u pktflags 0x%08x\n", 643 rxseq, tid, rxs->c_pktflags); 644 } 645 if (rxs_final != NULL) { 646 IEEE80211_DISCARD_MAC(vap, 647 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 648 ni->ni_macaddr, "a-mpdu duplicate", 649 "final: pktflags 0x%08x\n", 650 rxs_final->c_pktflags); 651 } 652 vap->iv_stats.is_rx_dup++; 653 IEEE80211_NODE_STAT(ni, rx_dup); 654 m_freem(m); 655 } 656 return CONSUMED; 657#undef CONSUMED 658#undef PROCESS 659} 660 661/* 662 * Purge all frames in the A-MPDU re-order queue. 663 */ 664static void 665ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 666{ 667 int i; 668 669 for (i = 0; i < rap->rxa_wnd; i++) { 670 ampdu_rx_purge_slot(rap, i); 671 if (rap->rxa_qframes == 0) 672 break; 673 } 674 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 675 ("lost %u data, %u frames on ampdu rx q", 676 rap->rxa_qbytes, rap->rxa_qframes)); 677} 678 679static void 680ieee80211_ampdu_rx_init_rap(struct ieee80211_node *ni, 681 struct ieee80211_rx_ampdu *rap) 682{ 683 int i; 684 685 /* XXX TODO: ensure the queues are empty */ 686 memset(rap, 0, sizeof(*rap)); 687 for (i = 0; i < IEEE80211_AGGR_BAWMAX; i++) 688 mbufq_init(&rap->rxa_mq[i], 256); 689} 690 691/* 692 * Start A-MPDU rx/re-order processing for the specified TID. 693 */ 694static int 695ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 696 int baparamset, int batimeout, int baseqctl) 697{ 698 struct ieee80211vap *vap = ni->ni_vap; 699 int bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 700 701 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 702 /* 703 * AMPDU previously setup and not terminated with a DELBA, 704 * flush the reorder q's in case anything remains. 705 */ 706 ampdu_rx_purge(rap); 707 } 708 ieee80211_ampdu_rx_init_rap(ni, rap); 709 rap->rxa_wnd = (bufsiz == 0) ? 710 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 711 rap->rxa_start = _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START); 712 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 713 714 /* XXX this should be a configuration flag */ 715 if ((vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU) && 716 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU))) 717 rap->rxa_flags |= IEEE80211_AGGR_AMSDU; 718 else 719 rap->rxa_flags &= ~IEEE80211_AGGR_AMSDU; 720 721 return 0; 722} 723 724/* 725 * Public function; manually setup the RX ampdu state. 726 */ 727int 728ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw) 729{ 730 struct ieee80211_rx_ampdu *rap; 731 732 /* XXX TODO: sanity check tid, seq, baw */ 733 734 rap = &ni->ni_rx_ampdu[tid]; 735 736 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 737 /* 738 * AMPDU previously setup and not terminated with a DELBA, 739 * flush the reorder q's in case anything remains. 740 */ 741 ampdu_rx_purge(rap); 742 } 743 744 ieee80211_ampdu_rx_init_rap(ni, rap); 745 746 rap->rxa_wnd = (baw== 0) ? 747 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX); 748 if (seq == -1) { 749 /* Wait for the first RX frame, use that as BAW */ 750 rap->rxa_start = 0; 751 rap->rxa_flags |= IEEE80211_AGGR_WAITRX; 752 } else { 753 rap->rxa_start = seq; 754 } 755 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 756 757 /* XXX TODO: no amsdu flag */ 758 759 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 760 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x", 761 __func__, 762 tid, 763 seq, 764 rap->rxa_wnd, 765 rap->rxa_flags); 766 767 return 0; 768} 769 770/* 771 * Public function; manually stop the RX AMPDU state. 772 */ 773void 774ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid) 775{ 776 struct ieee80211_rx_ampdu *rap; 777 778 /* XXX TODO: sanity check tid, seq, baw */ 779 rap = &ni->ni_rx_ampdu[tid]; 780 ampdu_rx_stop(ni, rap); 781} 782 783/* 784 * Stop A-MPDU rx processing for the specified TID. 785 */ 786static void 787ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 788{ 789 790 ampdu_rx_purge(rap); 791 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING 792 | IEEE80211_AGGR_XCHGPEND 793 | IEEE80211_AGGR_WAITRX); 794} 795 796/* 797 * Dispatch a frame from the A-MPDU reorder queue. The 798 * frame is fed back into ieee80211_input marked with an 799 * M_AMPDU_MPDU flag so it doesn't come back to us (it also 800 * permits ieee80211_input to optimize re-processing). 801 */ 802static __inline void 803ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 804{ 805 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 806 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 807 (void) ieee80211_input(ni, m, 0, 0); 808} 809 810static int 811ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 812 int i) 813{ 814 struct mbuf *m; 815 int n = 0; 816 817 while (mbufq_len(&rap->rxa_mq[i]) != 0) { 818 m = mbufq_dequeue(&rap->rxa_mq[i]); 819 if (m == NULL) 820 break; 821 n++; 822 823 rap->rxa_qbytes -= m->m_pkthdr.len; 824 rap->rxa_qframes--; 825 826 ampdu_dispatch(ni, m); 827 } 828 return (n); 829} 830 831static void 832ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 833 int i, int winstart) 834{ 835 struct ieee80211vap *vap = ni->ni_vap; 836 837 /* 838 * If frames remain, copy the mbuf pointers down so 839 * they correspond to the offsets in the new window. 840 */ 841 if (rap->rxa_qframes != 0) { 842 int n = rap->rxa_qframes, j; 843 for (j = i+1; j < rap->rxa_wnd; j++) { 844 /* 845 * Concat the list contents over, which will 846 * blank the source list for us. 847 */ 848 if (mbufq_len(&rap->rxa_mq[j]) != 0) { 849 n = n - mbufq_len(&rap->rxa_mq[j]); 850 mbufq_concat(&rap->rxa_mq[j-i], &rap->rxa_mq[j]); 851 KASSERT(n >= 0, ("%s: n < 0 (%d)", __func__, n)); 852 if (n == 0) 853 break; 854 } 855 } 856 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 857 "BA win <%d:%d> winstart %d", 858 __func__, n, rap->rxa_qframes, i, rap->rxa_start, 859 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 860 winstart)); 861 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 862 } 863} 864 865/* 866 * Dispatch as many frames as possible from the re-order queue. 867 * Frames will always be "at the front"; we process all frames 868 * up to the first empty slot in the window. On completion we 869 * cleanup state if there are still pending frames in the current 870 * BA window. We assume the frame at slot 0 is already handled 871 * by the caller; we always start at slot 1. 872 */ 873static void 874ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 875{ 876 struct ieee80211vap *vap = ni->ni_vap; 877 int i, r, r2; 878 879 /* flush run of frames */ 880 r2 = 0; 881 for (i = 1; i < rap->rxa_wnd; i++) { 882 r = ampdu_dispatch_slot(rap, ni, i); 883 if (r == 0) 884 break; 885 r2 += r; 886 } 887 888 /* move up frames */ 889 ampdu_rx_moveup(rap, ni, i, -1); 890 891 /* 892 * Adjust the start of the BA window to 893 * reflect the frames just dispatched. 894 */ 895 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 896 vap->iv_stats.is_ampdu_rx_oor += r2; 897 898 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 899 "%s: moved slot up %d slots to start at %d (%d frames)", 900 __func__, 901 i, 902 rap->rxa_start, 903 r2); 904} 905 906/* 907 * Dispatch all frames in the A-MPDU re-order queue. 908 */ 909static void 910ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 911{ 912 int i, r; 913 914 for (i = 0; i < rap->rxa_wnd; i++) { 915 r = ampdu_dispatch_slot(rap, ni, i); 916 if (r == 0) 917 continue; 918 ni->ni_vap->iv_stats.is_ampdu_rx_oor += r; 919 920 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 921 "%s: moved slot up %d slots to start at %d (%d frames)", 922 __func__, 923 1, 924 rap->rxa_start, 925 r); 926 927 if (rap->rxa_qframes == 0) 928 break; 929 } 930} 931 932/* 933 * Dispatch all frames in the A-MPDU re-order queue 934 * preceding the specified sequence number. This logic 935 * handles window moves due to a received MSDU or BAR. 936 */ 937static void 938ampdu_rx_flush_upto(struct ieee80211_node *ni, 939 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 940{ 941 struct ieee80211vap *vap = ni->ni_vap; 942 ieee80211_seq seqno; 943 int i, r; 944 945 /* 946 * Flush any complete MSDU's with a sequence number lower 947 * than winstart. Gaps may exist. Note that we may actually 948 * dispatch frames past winstart if a run continues; this is 949 * an optimization that avoids having to do a separate pass 950 * to dispatch frames after moving the BA window start. 951 */ 952 seqno = rap->rxa_start; 953 for (i = 0; i < rap->rxa_wnd; i++) { 954 if ((r = mbufq_len(&rap->rxa_mq[i])) != 0) { 955 (void) ampdu_dispatch_slot(rap, ni, i); 956 } else { 957 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 958 break; 959 } 960 vap->iv_stats.is_ampdu_rx_oor += r; 961 seqno = IEEE80211_SEQ_INC(seqno); 962 963 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 964 "%s: moved slot up %d slots to start at %d (%d frames)", 965 __func__, 966 1, 967 seqno, 968 r); 969 } 970 971 /* 972 * If frames remain, copy the mbuf pointers down so 973 * they correspond to the offsets in the new window. 974 */ 975 ampdu_rx_moveup(rap, ni, i, winstart); 976 977 /* 978 * Move the start of the BA window; we use the 979 * sequence number of the last MSDU that was 980 * passed up the stack+1 or winstart if stopped on 981 * a gap in the reorder buffer. 982 */ 983 rap->rxa_start = seqno; 984} 985 986/* 987 * Process a received QoS data frame for an HT station. Handle 988 * A-MPDU reordering: if this frame is received out of order 989 * and falls within the BA window hold onto it. Otherwise if 990 * this frame completes a run, flush any pending frames. We 991 * return 1 if the frame is consumed. A 0 is returned if 992 * the frame should be processed normally by the caller. 993 * 994 * A-MSDU: handle hardware decap'ed A-MSDU frames that are 995 * pretending to be MPDU's. They're dispatched directly if 996 * able; or attempted to put into the receive reordering slot. 997 */ 998int 999ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m, 1000 const struct ieee80211_rx_stats *rxs) 1001{ 1002#define PROCESS 0 /* caller should process frame */ 1003#define CONSUMED 1 /* frame consumed, caller does nothing */ 1004 struct ieee80211vap *vap = ni->ni_vap; 1005 struct ieee80211_qosframe *wh; 1006 struct ieee80211_rx_ampdu *rap; 1007 ieee80211_seq rxseq; 1008 uint8_t tid; 1009 int off; 1010 int amsdu = ieee80211_check_rxseq_amsdu(rxs); 1011 int amsdu_end = ieee80211_check_rxseq_amsdu_more(rxs); 1012 1013 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 1014 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 1015 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1016 1017 /* NB: m_len known to be sufficient */ 1018 wh = mtod(m, struct ieee80211_qosframe *); 1019 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 1020 /* 1021 * Not QoS data, shouldn't get here but just 1022 * return it to the caller for processing. 1023 */ 1024 return PROCESS; 1025 } 1026 1027 /* 1028 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery. 1029 * 1030 * Multicast QoS data frames are checked against a different 1031 * counter, not the per-TID counter. 1032 */ 1033 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1034 return PROCESS; 1035 1036 tid = ieee80211_getqos(wh)[0]; 1037 tid &= IEEE80211_QOS_TID; 1038 rap = &ni->ni_rx_ampdu[tid]; 1039 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1040 /* 1041 * No ADDBA request yet, don't touch. 1042 */ 1043 return PROCESS; 1044 } 1045 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1046 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 1047 /* 1048 * Fragments are not allowed; toss. 1049 */ 1050 IEEE80211_DISCARD_MAC(vap, 1051 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1052 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 1053 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1054 vap->iv_stats.is_ampdu_rx_drop++; 1055 IEEE80211_NODE_STAT(ni, rx_drop); 1056 m_freem(m); 1057 return CONSUMED; 1058 } 1059 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 1060 rap->rxa_nframes++; 1061 1062 /* 1063 * Handle waiting for the first frame to define the BAW. 1064 * Some firmware doesn't provide the RX of the starting point 1065 * of the BAW and we have to cope. 1066 */ 1067 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) { 1068 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX; 1069 rap->rxa_start = rxseq; 1070 } 1071again: 1072 if (rxseq == rap->rxa_start) { 1073 /* 1074 * First frame in window. 1075 */ 1076 if (rap->rxa_qframes != 0) { 1077 /* 1078 * Dispatch as many packets as we can. 1079 */ 1080 KASSERT((mbufq_len(&rap->rxa_mq[0]) == 0), ("unexpected dup")); 1081 ampdu_dispatch(ni, m); 1082 ampdu_rx_dispatch(rap, ni); 1083 return CONSUMED; 1084 } else { 1085 /* 1086 * In order; advance window if needed and notify 1087 * caller to dispatch directly. 1088 */ 1089 if (amsdu) { 1090 if (amsdu_end) { 1091 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 1092 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end); 1093 } else { 1094 IEEE80211_NODE_STAT(ni, rx_amsdu_more); 1095 } 1096 } else { 1097 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 1098 } 1099 return PROCESS; 1100 } 1101 } 1102 /* 1103 * Frame is out of order; store if in the BA window. 1104 */ 1105 /* calculate offset in BA window */ 1106 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 1107 if (off < rap->rxa_wnd) { 1108 /* 1109 * Common case (hopefully): in the BA window. 1110 * Sec 9.10.7.6.2 a) (p.137) 1111 */ 1112 1113 /* 1114 * Check for frames sitting too long in the reorder queue. 1115 * This should only ever happen if frames are not delivered 1116 * without the sender otherwise notifying us (e.g. with a 1117 * BAR to move the window). Typically this happens because 1118 * of vendor bugs that cause the sequence number to jump. 1119 * When this happens we get a gap in the reorder queue that 1120 * leaves frame sitting on the queue until they get pushed 1121 * out due to window moves. When the vendor does not send 1122 * BAR this move only happens due to explicit packet sends 1123 * 1124 * NB: we only track the time of the oldest frame in the 1125 * reorder q; this means that if we flush we might push 1126 * frames that still "new"; if this happens then subsequent 1127 * frames will result in BA window moves which cost something 1128 * but is still better than a big throughput dip. 1129 */ 1130 if (rap->rxa_qframes != 0) { 1131 /* XXX honor batimeout? */ 1132 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1133 /* 1134 * Too long since we received the first 1135 * frame; flush the reorder buffer. 1136 */ 1137 if (rap->rxa_qframes != 0) { 1138 vap->iv_stats.is_ampdu_rx_age += 1139 rap->rxa_qframes; 1140 ampdu_rx_flush(ni, rap); 1141 } 1142 /* 1143 * Advance the window if needed and notify 1144 * the caller to dispatch directly. 1145 */ 1146 if (amsdu) { 1147 if (amsdu_end) { 1148 rap->rxa_start = 1149 IEEE80211_SEQ_INC(rxseq); 1150 IEEE80211_NODE_STAT(ni, 1151 rx_amsdu_more_end); 1152 } else { 1153 IEEE80211_NODE_STAT(ni, 1154 rx_amsdu_more); 1155 } 1156 } else { 1157 rap->rxa_start = 1158 IEEE80211_SEQ_INC(rxseq); 1159 } 1160 return PROCESS; 1161 } 1162 } else { 1163 /* 1164 * First frame, start aging timer. 1165 */ 1166 rap->rxa_age = ticks; 1167 } 1168 1169 /* save packet - this consumes, no matter what */ 1170 ampdu_rx_add_slot(rap, off, tid, rxseq, ni, m, rxs); 1171 return CONSUMED; 1172 } 1173 if (off < IEEE80211_SEQ_BA_RANGE) { 1174 /* 1175 * Outside the BA window, but within range; 1176 * flush the reorder q and move the window. 1177 * Sec 9.10.7.6.2 b) (p.138) 1178 */ 1179 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1180 "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 1181 rap->rxa_start, 1182 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1183 rap->rxa_qframes, rxseq, tid); 1184 vap->iv_stats.is_ampdu_rx_move++; 1185 1186 /* 1187 * The spec says to flush frames up to but not including: 1188 * WinStart_B = rxseq - rap->rxa_wnd + 1 1189 * Then insert the frame or notify the caller to process 1190 * it immediately. We can safely do this by just starting 1191 * over again because we know the frame will now be within 1192 * the BA window. 1193 */ 1194 /* NB: rxa_wnd known to be >0 */ 1195 ampdu_rx_flush_upto(ni, rap, 1196 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 1197 goto again; 1198 } else { 1199 /* 1200 * Outside the BA window and out of range; toss. 1201 * Sec 9.10.7.6.2 c) (p.138) 1202 */ 1203 IEEE80211_DISCARD_MAC(vap, 1204 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1205 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1206 rap->rxa_start, 1207 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1208 rap->rxa_qframes, rxseq, tid, 1209 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1210 vap->iv_stats.is_ampdu_rx_drop++; 1211 IEEE80211_NODE_STAT(ni, rx_drop); 1212 m_freem(m); 1213 return CONSUMED; 1214 } 1215#undef CONSUMED 1216#undef PROCESS 1217} 1218 1219/* 1220 * Process a BAR ctl frame. Dispatch all frames up to 1221 * the sequence number of the frame. If this frame is 1222 * out of range it's discarded. 1223 */ 1224void 1225ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 1226{ 1227 struct ieee80211vap *vap = ni->ni_vap; 1228 struct ieee80211_frame_bar *wh; 1229 struct ieee80211_rx_ampdu *rap; 1230 ieee80211_seq rxseq; 1231 int tid, off; 1232 1233 if (!ieee80211_recv_bar_ena) { 1234#if 0 1235 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 1236 ni->ni_macaddr, "BAR", "%s", "processing disabled"); 1237#endif 1238 vap->iv_stats.is_ampdu_bar_bad++; 1239 return; 1240 } 1241 wh = mtod(m0, struct ieee80211_frame_bar *); 1242 /* XXX check basic BAR */ 1243 tid = _IEEE80211_MASKSHIFT(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 1244 rap = &ni->ni_rx_ampdu[tid]; 1245 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1246 /* 1247 * No ADDBA request yet, don't touch. 1248 */ 1249 IEEE80211_DISCARD_MAC(vap, 1250 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 1251 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 1252 vap->iv_stats.is_ampdu_bar_bad++; 1253 return; 1254 } 1255 vap->iv_stats.is_ampdu_bar_rx++; 1256 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 1257 if (rxseq == rap->rxa_start) 1258 return; 1259 /* calculate offset in BA window */ 1260 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 1261 if (off < IEEE80211_SEQ_BA_RANGE) { 1262 /* 1263 * Flush the reorder q up to rxseq and move the window. 1264 * Sec 9.10.7.6.3 a) (p.138) 1265 */ 1266 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1267 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 1268 rap->rxa_start, 1269 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1270 rap->rxa_qframes, rxseq, tid); 1271 vap->iv_stats.is_ampdu_bar_move++; 1272 1273 ampdu_rx_flush_upto(ni, rap, rxseq); 1274 if (off >= rap->rxa_wnd) { 1275 /* 1276 * BAR specifies a window start to the right of BA 1277 * window; we must move it explicitly since 1278 * ampdu_rx_flush_upto will not. 1279 */ 1280 rap->rxa_start = rxseq; 1281 } 1282 } else { 1283 /* 1284 * Out of range; toss. 1285 * Sec 9.10.7.6.3 b) (p.138) 1286 */ 1287 IEEE80211_DISCARD_MAC(vap, 1288 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1289 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1290 rap->rxa_start, 1291 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1292 rap->rxa_qframes, rxseq, tid, 1293 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1294 vap->iv_stats.is_ampdu_bar_oow++; 1295 IEEE80211_NODE_STAT(ni, rx_drop); 1296 } 1297} 1298 1299/* 1300 * Setup HT-specific state in a node. Called only 1301 * when HT use is negotiated so we don't do extra 1302 * work for temporary and/or legacy sta's. 1303 */ 1304void 1305ieee80211_ht_node_init(struct ieee80211_node *ni) 1306{ 1307 struct ieee80211_tx_ampdu *tap; 1308 int tid; 1309 1310 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1311 ni, 1312 "%s: called (%p)", 1313 __func__, 1314 ni); 1315 1316 if (ni->ni_flags & IEEE80211_NODE_HT) { 1317 /* 1318 * Clean AMPDU state on re-associate. This handles the case 1319 * where a station leaves w/o notifying us and then returns 1320 * before node is reaped for inactivity. 1321 */ 1322 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1323 ni, 1324 "%s: calling cleanup (%p)", 1325 __func__, ni); 1326 ieee80211_ht_node_cleanup(ni); 1327 } 1328 for (tid = 0; tid < WME_NUM_TID; tid++) { 1329 tap = &ni->ni_tx_ampdu[tid]; 1330 tap->txa_tid = tid; 1331 tap->txa_ni = ni; 1332 ieee80211_txampdu_init_pps(tap); 1333 /* NB: further initialization deferred */ 1334 ieee80211_ampdu_rx_init_rap(ni, &ni->ni_rx_ampdu[tid]); 1335 } 1336 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU | 1337 IEEE80211_NODE_AMSDU; 1338} 1339 1340/* 1341 * Cleanup HT-specific state in a node. Called only 1342 * when HT use has been marked. 1343 */ 1344void 1345ieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1346{ 1347 struct ieee80211com *ic = ni->ni_ic; 1348 int i; 1349 1350 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1351 ni, 1352 "%s: called (%p)", 1353 __func__, ni); 1354 1355 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1356 1357 /* XXX optimize this */ 1358 for (i = 0; i < WME_NUM_TID; i++) { 1359 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1360 if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1361 ampdu_tx_stop(tap); 1362 } 1363 for (i = 0; i < WME_NUM_TID; i++) 1364 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1365 1366 ni->ni_htcap = 0; 1367 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1368} 1369 1370/* 1371 * Age out HT resources for a station. 1372 */ 1373void 1374ieee80211_ht_node_age(struct ieee80211_node *ni) 1375{ 1376 struct ieee80211vap *vap = ni->ni_vap; 1377 uint8_t tid; 1378 1379 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1380 1381 for (tid = 0; tid < WME_NUM_TID; tid++) { 1382 struct ieee80211_rx_ampdu *rap; 1383 1384 rap = &ni->ni_rx_ampdu[tid]; 1385 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1386 continue; 1387 if (rap->rxa_qframes == 0) 1388 continue; 1389 /* 1390 * Check for frames sitting too long in the reorder queue. 1391 * See above for more details on what's happening here. 1392 */ 1393 /* XXX honor batimeout? */ 1394 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1395 /* 1396 * Too long since we received the first 1397 * frame; flush the reorder buffer. 1398 */ 1399 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1400 ampdu_rx_flush(ni, rap); 1401 } 1402 } 1403} 1404 1405static struct ieee80211_channel * 1406findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1407{ 1408 return ieee80211_find_channel(ic, c->ic_freq, 1409 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1410} 1411 1412/* 1413 * Adjust a channel to be HT/non-HT according to the vap's configuration. 1414 */ 1415struct ieee80211_channel * 1416ieee80211_ht_adjust_channel(struct ieee80211com *ic, 1417 struct ieee80211_channel *chan, int flags) 1418{ 1419 struct ieee80211_channel *c; 1420 1421 if (flags & IEEE80211_FHT_HT) { 1422 /* promote to HT if possible */ 1423 if (flags & IEEE80211_FHT_USEHT40) { 1424 if (!IEEE80211_IS_CHAN_HT40(chan)) { 1425 /* NB: arbitrarily pick ht40+ over ht40- */ 1426 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1427 if (c == NULL) 1428 c = findhtchan(ic, chan, 1429 IEEE80211_CHAN_HT40D); 1430 if (c == NULL) 1431 c = findhtchan(ic, chan, 1432 IEEE80211_CHAN_HT20); 1433 if (c != NULL) 1434 chan = c; 1435 } 1436 } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1437 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1438 if (c != NULL) 1439 chan = c; 1440 } 1441 } else if (IEEE80211_IS_CHAN_HT(chan)) { 1442 /* demote to legacy, HT use is disabled */ 1443 c = ieee80211_find_channel(ic, chan->ic_freq, 1444 chan->ic_flags &~ IEEE80211_CHAN_HT); 1445 if (c != NULL) 1446 chan = c; 1447 } 1448 return chan; 1449} 1450 1451/* 1452 * Setup HT-specific state for a legacy WDS peer. 1453 */ 1454void 1455ieee80211_ht_wds_init(struct ieee80211_node *ni) 1456{ 1457 struct ieee80211vap *vap = ni->ni_vap; 1458 struct ieee80211_tx_ampdu *tap; 1459 int tid; 1460 1461 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1462 1463 /* XXX check scan cache in case peer has an ap and we have info */ 1464 /* 1465 * If setup with a legacy channel; locate an HT channel. 1466 * Otherwise if the inherited channel (from a companion 1467 * AP) is suitable use it so we use the same location 1468 * for the extension channel). 1469 */ 1470 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1471 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1472 1473 ni->ni_htcap = 0; 1474 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1475 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1476 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1477 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1478 ni->ni_chw = 40; 1479 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1480 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1481 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1482 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1483 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1484 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1485 } else { 1486 ni->ni_chw = 20; 1487 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1488 } 1489 ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1490 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1491 ni->ni_flags |= IEEE80211_NODE_RIFS; 1492 /* XXX does it make sense to enable SMPS? */ 1493 1494 ni->ni_htopmode = 0; /* XXX need protection state */ 1495 ni->ni_htstbc = 0; /* XXX need info */ 1496 1497 for (tid = 0; tid < WME_NUM_TID; tid++) { 1498 tap = &ni->ni_tx_ampdu[tid]; 1499 tap->txa_tid = tid; 1500 ieee80211_txampdu_init_pps(tap); 1501 } 1502 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1503 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU | 1504 IEEE80211_NODE_AMSDU; 1505} 1506 1507/* 1508 * Notify a VAP of a change in the HTINFO ie if it's a hostap VAP. 1509 * 1510 * This is to be called from the deferred HT protection update 1511 * task once the flags are updated. 1512 */ 1513void 1514ieee80211_htinfo_notify(struct ieee80211vap *vap) 1515{ 1516 1517 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1518 1519 if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1520 return; 1521 if (vap->iv_state != IEEE80211_S_RUN || 1522 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1523 return; 1524 1525 IEEE80211_NOTE(vap, 1526 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1527 vap->iv_bss, 1528 "HT bss occupancy change: %d sta, %d ht, " 1529 "%d ht40%s, HT protmode now 0x%x" 1530 , vap->iv_sta_assoc 1531 , vap->iv_ht_sta_assoc 1532 , vap->iv_ht40_sta_assoc 1533 , (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1534 ", non-HT sta present" : "" 1535 , vap->iv_curhtprotmode); 1536 1537 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1538} 1539 1540/* 1541 * Calculate HT protection mode from current 1542 * state and handle updates. 1543 */ 1544static void 1545htinfo_update(struct ieee80211vap *vap) 1546{ 1547 struct ieee80211com *ic = vap->iv_ic; 1548 uint8_t protmode; 1549 1550 if (vap->iv_sta_assoc != vap->iv_ht_sta_assoc) { 1551 protmode = IEEE80211_HTINFO_OPMODE_MIXED 1552 | IEEE80211_HTINFO_NONHT_PRESENT; 1553 } else if (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) { 1554 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1555 | IEEE80211_HTINFO_NONHT_PRESENT; 1556 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1557 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1558 vap->iv_sta_assoc != vap->iv_ht40_sta_assoc) { 1559 protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1560 } else { 1561 protmode = IEEE80211_HTINFO_OPMODE_PURE; 1562 } 1563 if (protmode != vap->iv_curhtprotmode) { 1564 vap->iv_curhtprotmode = protmode; 1565 /* Update VAP with new protection mode */ 1566 ieee80211_vap_update_ht_protmode(vap); 1567 } 1568} 1569 1570/* 1571 * Handle an HT station joining a BSS. 1572 */ 1573void 1574ieee80211_ht_node_join(struct ieee80211_node *ni) 1575{ 1576 struct ieee80211vap *vap = ni->ni_vap; 1577 1578 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1579 1580 if (ni->ni_flags & IEEE80211_NODE_HT) { 1581 vap->iv_ht_sta_assoc++; 1582 if (ni->ni_chw == 40) 1583 vap->iv_ht40_sta_assoc++; 1584 } 1585 htinfo_update(vap); 1586} 1587 1588/* 1589 * Handle an HT station leaving a BSS. 1590 */ 1591void 1592ieee80211_ht_node_leave(struct ieee80211_node *ni) 1593{ 1594 struct ieee80211vap *vap = ni->ni_vap; 1595 1596 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1597 1598 if (ni->ni_flags & IEEE80211_NODE_HT) { 1599 vap->iv_ht_sta_assoc--; 1600 if (ni->ni_chw == 40) 1601 vap->iv_ht40_sta_assoc--; 1602 } 1603 htinfo_update(vap); 1604} 1605 1606/* 1607 * Public version of htinfo_update; used for processing 1608 * beacon frames from overlapping bss. 1609 * 1610 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1611 * (on receipt of a beacon that advertises MIXED) or 1612 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1613 * from an overlapping legacy bss). We treat MIXED with 1614 * a higher precedence than PROTOPT (i.e. we will not change 1615 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1616 * corresponds to how we handle things in htinfo_update. 1617 * 1618 */ 1619void 1620ieee80211_htprot_update(struct ieee80211vap *vap, int protmode) 1621{ 1622 struct ieee80211com *ic = vap->iv_ic; 1623#define OPMODE(x) _IEEE80211_SHIFTMASK(x, IEEE80211_HTINFO_OPMODE) 1624 IEEE80211_LOCK(ic); 1625 1626 /* track non-HT station presence */ 1627 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1628 ("protmode 0x%x", protmode)); 1629 vap->iv_flags_ht |= IEEE80211_FHT_NONHT_PR; 1630 vap->iv_lastnonht = ticks; 1631 1632 if (protmode != vap->iv_curhtprotmode && 1633 (OPMODE(vap->iv_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1634 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1635 vap->iv_curhtprotmode = protmode; 1636 /* Update VAP with new protection mode */ 1637 ieee80211_vap_update_ht_protmode(vap); 1638 } 1639 IEEE80211_UNLOCK(ic); 1640#undef OPMODE 1641} 1642 1643/* 1644 * Time out presence of an overlapping bss with non-HT 1645 * stations. When operating in hostap mode we listen for 1646 * beacons from other stations and if we identify a non-HT 1647 * station is present we update the opmode field of the 1648 * HTINFO ie. To identify when all non-HT stations are 1649 * gone we time out this condition. 1650 */ 1651void 1652ieee80211_ht_timeout(struct ieee80211vap *vap) 1653{ 1654 1655 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1656 1657 if ((vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) && 1658 ieee80211_time_after(ticks, vap->iv_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1659 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N, 1660 "%s", "time out non-HT STA present on channel"); 1661 vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1662 htinfo_update(vap); 1663 } 1664} 1665 1666/* 1667 * Process an 802.11n HT capabilities ie. 1668 */ 1669void 1670ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1671{ 1672 if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1673 /* 1674 * Station used Vendor OUI ie to associate; 1675 * mark the node so when we respond we'll use 1676 * the Vendor OUI's and not the standard ie's. 1677 */ 1678 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1679 ie += 4; 1680 } else 1681 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1682 1683 ni->ni_htcap = le16dec(ie + 1684 __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1685 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1686} 1687 1688static void 1689htinfo_parse(struct ieee80211_node *ni, 1690 const struct ieee80211_ie_htinfo *htinfo) 1691{ 1692 uint16_t w; 1693 1694 ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1695 ni->ni_ht2ndchan = _IEEE80211_SHIFTMASK(htinfo->hi_byte1, 1696 IEEE80211_HTINFO_2NDCHAN); 1697 w = le16dec(&htinfo->hi_byte2); 1698 ni->ni_htopmode = _IEEE80211_SHIFTMASK(w, IEEE80211_HTINFO_OPMODE); 1699 w = le16dec(&htinfo->hi_byte45); 1700 ni->ni_htstbc = _IEEE80211_SHIFTMASK(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1701} 1702 1703/* 1704 * Parse an 802.11n HT info ie and save useful information 1705 * to the node state. Note this does not effect any state 1706 * changes such as for channel width change. 1707 */ 1708void 1709ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1710{ 1711 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1712 ie += 4; 1713 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1714} 1715 1716/* 1717 * Handle 11n/11ac channel switch. 1718 * 1719 * Use the received HT/VHT ie's to identify the right channel to use. 1720 * If we cannot locate it in the channel table then fallback to 1721 * legacy operation. 1722 * 1723 * Note that we use this information to identify the node's 1724 * channel only; the caller is responsible for insuring any 1725 * required channel change is done (e.g. in sta mode when 1726 * parsing the contents of a beacon frame). 1727 */ 1728static int 1729htinfo_update_chw(struct ieee80211_node *ni, int htflags, int vhtflags) 1730{ 1731 struct ieee80211com *ic = ni->ni_ic; 1732 struct ieee80211_channel *c; 1733 int chanflags; 1734 int ret = 0; 1735 1736 /* 1737 * First step - do HT/VHT only channel lookup based on operating mode 1738 * flags. This involves masking out the VHT flags as well. 1739 * Otherwise we end up doing the full channel walk each time 1740 * we trigger this, which is expensive. 1741 */ 1742 chanflags = (ni->ni_chan->ic_flags &~ 1743 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags | vhtflags; 1744 1745 if (chanflags == ni->ni_chan->ic_flags) 1746 goto done; 1747 1748 /* 1749 * If HT /or/ VHT flags have changed then check both. 1750 * We need to start by picking a HT channel anyway. 1751 */ 1752 1753 c = NULL; 1754 chanflags = (ni->ni_chan->ic_flags &~ 1755 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags; 1756 /* XXX not right for ht40- */ 1757 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1758 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1759 /* 1760 * No HT40 channel entry in our table; fall back 1761 * to HT20 operation. This should not happen. 1762 */ 1763 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1764#if 0 1765 IEEE80211_NOTE(ni->ni_vap, 1766 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1767 "no HT40 channel (freq %u), falling back to HT20", 1768 ni->ni_chan->ic_freq); 1769#endif 1770 /* XXX stat */ 1771 } 1772 1773 /* Nothing found - leave it alone; move onto VHT */ 1774 if (c == NULL) 1775 c = ni->ni_chan; 1776 1777 /* 1778 * If it's non-HT, then bail out now. 1779 */ 1780 if (! IEEE80211_IS_CHAN_HT(c)) { 1781 IEEE80211_NOTE(ni->ni_vap, 1782 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1783 "not HT; skipping VHT check (%u/0x%x)", 1784 c->ic_freq, c->ic_flags); 1785 goto done; 1786 } 1787 1788 /* 1789 * Next step - look at the current VHT flags and determine 1790 * if we need to upgrade. Mask out the VHT and HT flags since 1791 * the vhtflags field will already have the correct HT 1792 * flags to use. 1793 */ 1794 if (IEEE80211_CONF_VHT(ic) && ni->ni_vhtcap != 0 && vhtflags != 0) { 1795 chanflags = (c->ic_flags 1796 &~ (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) 1797 | vhtflags; 1798 IEEE80211_NOTE(ni->ni_vap, 1799 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1800 ni, 1801 "%s: VHT; chanwidth=0x%02x; vhtflags=0x%08x", 1802 __func__, ni->ni_vht_chanwidth, vhtflags); 1803 1804 IEEE80211_NOTE(ni->ni_vap, 1805 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1806 ni, 1807 "%s: VHT; trying lookup for %d/0x%08x", 1808 __func__, c->ic_freq, chanflags); 1809 c = ieee80211_find_channel(ic, c->ic_freq, chanflags); 1810 } 1811 1812 /* Finally, if it's changed */ 1813 if (c != NULL && c != ni->ni_chan) { 1814 IEEE80211_NOTE(ni->ni_vap, 1815 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1816 "switch station to %s%d channel %u/0x%x", 1817 IEEE80211_IS_CHAN_VHT(c) ? "VHT" : "HT", 1818 IEEE80211_IS_CHAN_VHT80(c) ? 80 : 1819 (IEEE80211_IS_CHAN_HT40(c) ? 40 : 20), 1820 c->ic_freq, c->ic_flags); 1821 ni->ni_chan = c; 1822 ret = 1; 1823 } 1824 /* NB: caller responsible for forcing any channel change */ 1825 1826done: 1827 /* update node's (11n) tx channel width */ 1828 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1829 return (ret); 1830} 1831 1832/* 1833 * Update 11n MIMO PS state according to received htcap. 1834 */ 1835static __inline int 1836htcap_update_mimo_ps(struct ieee80211_node *ni) 1837{ 1838 uint16_t oflags = ni->ni_flags; 1839 1840 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1841 case IEEE80211_HTCAP_SMPS_DYNAMIC: 1842 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1843 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1844 break; 1845 case IEEE80211_HTCAP_SMPS_ENA: 1846 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1847 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1848 break; 1849 case IEEE80211_HTCAP_SMPS_OFF: 1850 default: /* disable on rx of reserved value */ 1851 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1852 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1853 break; 1854 } 1855 return (oflags ^ ni->ni_flags); 1856} 1857 1858/* 1859 * Update short GI state according to received htcap 1860 * and local settings. 1861 */ 1862static __inline void 1863htcap_update_shortgi(struct ieee80211_node *ni) 1864{ 1865 struct ieee80211vap *vap = ni->ni_vap; 1866 1867 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1868 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1869 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1870 ni->ni_flags |= IEEE80211_NODE_SGI20; 1871 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1872 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1873 ni->ni_flags |= IEEE80211_NODE_SGI40; 1874} 1875 1876/* 1877 * Update LDPC state according to received htcap 1878 * and local settings. 1879 */ 1880static __inline void 1881htcap_update_ldpc(struct ieee80211_node *ni) 1882{ 1883 struct ieee80211vap *vap = ni->ni_vap; 1884 1885 if ((ni->ni_htcap & IEEE80211_HTCAP_LDPC) && 1886 (vap->iv_flags_ht & IEEE80211_FHT_LDPC_TX)) 1887 ni->ni_flags |= IEEE80211_NODE_LDPC; 1888} 1889 1890/* 1891 * Parse and update HT-related state extracted from 1892 * the HT cap and info ie's. 1893 * 1894 * This is called from the STA management path and 1895 * the ieee80211_node_join() path. It will take into 1896 * account the IEs discovered during scanning and 1897 * adjust things accordingly. 1898 */ 1899void 1900ieee80211_ht_updateparams(struct ieee80211_node *ni, 1901 const uint8_t *htcapie, const uint8_t *htinfoie) 1902{ 1903 struct ieee80211vap *vap = ni->ni_vap; 1904 const struct ieee80211_ie_htinfo *htinfo; 1905 1906 ieee80211_parse_htcap(ni, htcapie); 1907 if (vap->iv_htcaps & IEEE80211_HTC_SMPS) 1908 htcap_update_mimo_ps(ni); 1909 htcap_update_shortgi(ni); 1910 htcap_update_ldpc(ni); 1911 1912 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1913 htinfoie += 4; 1914 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1915 htinfo_parse(ni, htinfo); 1916 1917 /* 1918 * Defer the node channel change; we need to now 1919 * update VHT parameters before we do it. 1920 */ 1921 1922 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1923 (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1924 ni->ni_flags |= IEEE80211_NODE_RIFS; 1925 else 1926 ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1927} 1928 1929static uint32_t 1930ieee80211_vht_get_vhtflags(struct ieee80211_node *ni, uint32_t htflags) 1931{ 1932 struct ieee80211vap *vap = ni->ni_vap; 1933 uint32_t vhtflags = 0; 1934 1935 vhtflags = 0; 1936 if (ni->ni_flags & IEEE80211_NODE_VHT && vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1937 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_160MHZ) && 1938 /* XXX 2 means "160MHz and 80+80MHz", 1 means "160MHz" */ 1939 (_IEEE80211_MASKSHIFT(vap->iv_vhtcaps, 1940 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1) && 1941 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT160)) { 1942 vhtflags = IEEE80211_CHAN_VHT160; 1943 /* Mirror the HT40 flags */ 1944 if (htflags == IEEE80211_CHAN_HT40U) { 1945 vhtflags |= IEEE80211_CHAN_HT40U; 1946 } else if (htflags == IEEE80211_CHAN_HT40D) { 1947 vhtflags |= IEEE80211_CHAN_HT40D; 1948 } 1949 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80P80MHZ) && 1950 /* XXX 2 means "160MHz and 80+80MHz" */ 1951 (_IEEE80211_MASKSHIFT(vap->iv_vhtcaps, 1952 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2) && 1953 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80P80)) { 1954 vhtflags = IEEE80211_CHAN_VHT80P80; 1955 /* Mirror the HT40 flags */ 1956 if (htflags == IEEE80211_CHAN_HT40U) { 1957 vhtflags |= IEEE80211_CHAN_HT40U; 1958 } else if (htflags == IEEE80211_CHAN_HT40D) { 1959 vhtflags |= IEEE80211_CHAN_HT40D; 1960 } 1961 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80MHZ) && 1962 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80)) { 1963 vhtflags = IEEE80211_CHAN_VHT80; 1964 /* Mirror the HT40 flags */ 1965 if (htflags == IEEE80211_CHAN_HT40U) { 1966 vhtflags |= IEEE80211_CHAN_HT40U; 1967 } else if (htflags == IEEE80211_CHAN_HT40D) { 1968 vhtflags |= IEEE80211_CHAN_HT40D; 1969 } 1970 } else if (ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_USE_HT) { 1971 /* Mirror the HT40 flags */ 1972 /* 1973 * XXX TODO: if ht40 is disabled, but vht40 isn't 1974 * disabled then this logic will get very, very sad. 1975 * It's quite possible the only sane thing to do is 1976 * to not have vht40 as an option, and just obey 1977 * 'ht40' as that flag. 1978 */ 1979 if ((htflags == IEEE80211_CHAN_HT40U) && 1980 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) { 1981 vhtflags = IEEE80211_CHAN_VHT40U 1982 | IEEE80211_CHAN_HT40U; 1983 } else if (htflags == IEEE80211_CHAN_HT40D && 1984 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) { 1985 vhtflags = IEEE80211_CHAN_VHT40D 1986 | IEEE80211_CHAN_HT40D; 1987 } else if (htflags == IEEE80211_CHAN_HT20) { 1988 vhtflags = IEEE80211_CHAN_VHT20 1989 | IEEE80211_CHAN_HT20; 1990 } 1991 } else { 1992 vhtflags = IEEE80211_CHAN_VHT20; 1993 } 1994 } 1995 return (vhtflags); 1996} 1997 1998/* 1999 * Final part of updating the HT parameters. 2000 * 2001 * This is called from the STA management path and 2002 * the ieee80211_node_join() path. It will take into 2003 * account the IEs discovered during scanning and 2004 * adjust things accordingly. 2005 * 2006 * This is done after a call to ieee80211_ht_updateparams() 2007 * because it (and the upcoming VHT version of updateparams) 2008 * needs to ensure everything is parsed before htinfo_update_chw() 2009 * is called - which will change the channel config for the 2010 * node for us. 2011 */ 2012int 2013ieee80211_ht_updateparams_final(struct ieee80211_node *ni, 2014 const uint8_t *htcapie, const uint8_t *htinfoie) 2015{ 2016 struct ieee80211vap *vap = ni->ni_vap; 2017 const struct ieee80211_ie_htinfo *htinfo; 2018 int htflags, vhtflags; 2019 int ret = 0; 2020 2021 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 2022 2023 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 2024 IEEE80211_CHAN_HT20 : 0; 2025 2026 /* NB: honor operating mode constraint */ 2027 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 2028 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 2029 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 2030 htflags = IEEE80211_CHAN_HT40U; 2031 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 2032 htflags = IEEE80211_CHAN_HT40D; 2033 } 2034 2035 /* 2036 * VHT flags - do much the same; check whether VHT is available 2037 * and if so, what our ideal channel use would be based on our 2038 * capabilities and the (pre-parsed) VHT info IE. 2039 */ 2040 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 2041 2042 if (htinfo_update_chw(ni, htflags, vhtflags)) 2043 ret = 1; 2044 2045 return (ret); 2046} 2047 2048/* 2049 * Parse and update HT-related state extracted from the HT cap ie 2050 * for a station joining an HT BSS. 2051 * 2052 * This is called from the hostap path for each station. 2053 */ 2054void 2055ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 2056{ 2057 struct ieee80211vap *vap = ni->ni_vap; 2058 2059 ieee80211_parse_htcap(ni, htcapie); 2060 if (vap->iv_htcaps & IEEE80211_HTC_SMPS) 2061 htcap_update_mimo_ps(ni); 2062 htcap_update_shortgi(ni); 2063 htcap_update_ldpc(ni); 2064} 2065 2066/* 2067 * Called once HT and VHT capabilities are parsed in hostap mode - 2068 * this will adjust the channel configuration of the given node 2069 * based on the configuration and capabilities. 2070 */ 2071void 2072ieee80211_ht_updatehtcap_final(struct ieee80211_node *ni) 2073{ 2074 struct ieee80211vap *vap = ni->ni_vap; 2075 int htflags; 2076 int vhtflags; 2077 2078 /* NB: honor operating mode constraint */ 2079 /* XXX 40 MHz intolerant */ 2080 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 2081 IEEE80211_CHAN_HT20 : 0; 2082 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 2083 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 2084 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 2085 htflags = IEEE80211_CHAN_HT40U; 2086 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 2087 htflags = IEEE80211_CHAN_HT40D; 2088 } 2089 /* 2090 * VHT flags - do much the same; check whether VHT is available 2091 * and if so, what our ideal channel use would be based on our 2092 * capabilities and the (pre-parsed) VHT info IE. 2093 */ 2094 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 2095 2096 (void) htinfo_update_chw(ni, htflags, vhtflags); 2097} 2098 2099/* 2100 * Install received HT rate set by parsing the HT cap ie. 2101 */ 2102int 2103ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 2104{ 2105 struct ieee80211com *ic = ni->ni_ic; 2106 struct ieee80211vap *vap = ni->ni_vap; 2107 const struct ieee80211_ie_htcap *htcap; 2108 struct ieee80211_htrateset *rs; 2109 int i, maxequalmcs, maxunequalmcs; 2110 2111 maxequalmcs = ic->ic_txstream * 8 - 1; 2112 maxunequalmcs = 0; 2113 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 2114 if (ic->ic_txstream >= 2) 2115 maxunequalmcs = 38; 2116 if (ic->ic_txstream >= 3) 2117 maxunequalmcs = 52; 2118 if (ic->ic_txstream >= 4) 2119 maxunequalmcs = 76; 2120 } 2121 2122 rs = &ni->ni_htrates; 2123 memset(rs, 0, sizeof(*rs)); 2124 if (ie != NULL) { 2125 if (ie[0] == IEEE80211_ELEMID_VENDOR) 2126 ie += 4; 2127 htcap = (const struct ieee80211_ie_htcap *) ie; 2128 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 2129 if (isclr(htcap->hc_mcsset, i)) 2130 continue; 2131 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 2132 IEEE80211_NOTE(vap, 2133 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 2134 "WARNING, HT rate set too large; only " 2135 "using %u rates", IEEE80211_HTRATE_MAXSIZE); 2136 vap->iv_stats.is_rx_rstoobig++; 2137 break; 2138 } 2139 if (i <= 31 && i > maxequalmcs) 2140 continue; 2141 if (i == 32 && 2142 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 2143 continue; 2144 if (i > 32 && i > maxunequalmcs) 2145 continue; 2146 rs->rs_rates[rs->rs_nrates++] = i; 2147 } 2148 } 2149 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 2150} 2151 2152/* 2153 * Mark rates in a node's HT rate set as basic according 2154 * to the information in the supplied HT info ie. 2155 */ 2156void 2157ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 2158{ 2159 const struct ieee80211_ie_htinfo *htinfo; 2160 struct ieee80211_htrateset *rs; 2161 int i, j; 2162 2163 if (ie[0] == IEEE80211_ELEMID_VENDOR) 2164 ie += 4; 2165 htinfo = (const struct ieee80211_ie_htinfo *) ie; 2166 rs = &ni->ni_htrates; 2167 if (rs->rs_nrates == 0) { 2168 IEEE80211_NOTE(ni->ni_vap, 2169 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 2170 "%s", "WARNING, empty HT rate set"); 2171 return; 2172 } 2173 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 2174 if (isclr(htinfo->hi_basicmcsset, i)) 2175 continue; 2176 for (j = 0; j < rs->rs_nrates; j++) 2177 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 2178 rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 2179 } 2180} 2181 2182static void 2183ampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 2184{ 2185 callout_init(&tap->txa_timer, 1); 2186 tap->txa_flags |= IEEE80211_AGGR_SETUP; 2187 tap->txa_lastsample = ticks; 2188} 2189 2190static void 2191ampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 2192{ 2193 struct ieee80211_node *ni = tap->txa_ni; 2194 struct ieee80211com *ic = ni->ni_ic; 2195 2196 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2197 tap->txa_ni, 2198 "%s: called", 2199 __func__); 2200 2201 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 2202 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid, 2203 TID_TO_WME_AC(tap->txa_tid))); 2204 2205 /* 2206 * Stop BA stream if setup so driver has a chance 2207 * to reclaim any resources it might have allocated. 2208 */ 2209 ic->ic_addba_stop(ni, tap); 2210 /* 2211 * Stop any pending BAR transmit. 2212 */ 2213 bar_stop_timer(tap); 2214 2215 /* 2216 * Reset packet estimate. 2217 */ 2218 ieee80211_txampdu_init_pps(tap); 2219 2220 /* NB: clearing NAK means we may re-send ADDBA */ 2221 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 2222} 2223 2224/* 2225 * ADDBA response timeout. 2226 * 2227 * If software aggregation and per-TID queue management was done here, 2228 * that queue would be unpaused after the ADDBA timeout occurs. 2229 */ 2230static void 2231addba_timeout(void *arg) 2232{ 2233 struct ieee80211_tx_ampdu *tap = arg; 2234 struct ieee80211_node *ni = tap->txa_ni; 2235 struct ieee80211com *ic = ni->ni_ic; 2236 2237 /* XXX ? */ 2238 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2239 tap->txa_attempts++; 2240 ic->ic_addba_response_timeout(ni, tap); 2241} 2242 2243static void 2244addba_start_timeout(struct ieee80211_tx_ampdu *tap) 2245{ 2246 /* XXX use CALLOUT_PENDING instead? */ 2247 callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 2248 addba_timeout, tap); 2249 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 2250 tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 2251} 2252 2253static void 2254addba_stop_timeout(struct ieee80211_tx_ampdu *tap) 2255{ 2256 /* XXX use CALLOUT_PENDING instead? */ 2257 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 2258 callout_stop(&tap->txa_timer); 2259 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2260 } 2261} 2262 2263static void 2264null_addba_response_timeout(struct ieee80211_node *ni, 2265 struct ieee80211_tx_ampdu *tap) 2266{ 2267} 2268 2269/* 2270 * Default method for requesting A-MPDU tx aggregation. 2271 * We setup the specified state block and start a timer 2272 * to wait for an ADDBA response frame. 2273 */ 2274static int 2275ieee80211_addba_request(struct ieee80211_node *ni, 2276 struct ieee80211_tx_ampdu *tap, 2277 int dialogtoken, int baparamset, int batimeout) 2278{ 2279 int bufsiz; 2280 2281 /* XXX locking */ 2282 tap->txa_token = dialogtoken; 2283 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 2284 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2285 tap->txa_wnd = (bufsiz == 0) ? 2286 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2287 addba_start_timeout(tap); 2288 return 1; 2289} 2290 2291/* 2292 * Called by drivers that wish to request an ADDBA session be 2293 * setup. This brings it up and starts the request timer. 2294 */ 2295int 2296ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid) 2297{ 2298 struct ieee80211_tx_ampdu *tap; 2299 2300 if (tid < 0 || tid > 15) 2301 return (0); 2302 tap = &ni->ni_tx_ampdu[tid]; 2303 2304 /* XXX locking */ 2305 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2306 /* do deferred setup of state */ 2307 ampdu_tx_setup(tap); 2308 } 2309 /* XXX hack for not doing proper locking */ 2310 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2311 addba_start_timeout(tap); 2312 return (1); 2313} 2314 2315/* 2316 * Called by drivers that have marked a session as active. 2317 */ 2318int 2319ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid, 2320 int status) 2321{ 2322 struct ieee80211_tx_ampdu *tap; 2323 2324 if (tid < 0 || tid > 15) 2325 return (0); 2326 tap = &ni->ni_tx_ampdu[tid]; 2327 2328 /* XXX locking */ 2329 addba_stop_timeout(tap); 2330 if (status == 1) { 2331 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2332 tap->txa_attempts = 0; 2333 } else { 2334 /* mark tid so we don't try again */ 2335 tap->txa_flags |= IEEE80211_AGGR_NAK; 2336 } 2337 return (1); 2338} 2339 2340/* 2341 * Default method for processing an A-MPDU tx aggregation 2342 * response. We shutdown any pending timer and update the 2343 * state block according to the reply. 2344 */ 2345static int 2346ieee80211_addba_response(struct ieee80211_node *ni, 2347 struct ieee80211_tx_ampdu *tap, 2348 int status, int baparamset, int batimeout) 2349{ 2350 struct ieee80211vap *vap = ni->ni_vap; 2351 int bufsiz, tid; 2352 2353 /* XXX locking */ 2354 addba_stop_timeout(tap); 2355 if (status == IEEE80211_STATUS_SUCCESS) { 2356 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2357 /* XXX override our request? */ 2358 tap->txa_wnd = (bufsiz == 0) ? 2359 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2360 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2361 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2362 tap->txa_attempts = 0; 2363 /* TODO: this should be a vap flag */ 2364 if ((vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU) && 2365 (ni->ni_flags & IEEE80211_NODE_AMSDU_TX) && 2366 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU))) 2367 tap->txa_flags |= IEEE80211_AGGR_AMSDU; 2368 else 2369 tap->txa_flags &= ~IEEE80211_AGGR_AMSDU; 2370 } else { 2371 /* mark tid so we don't try again */ 2372 tap->txa_flags |= IEEE80211_AGGR_NAK; 2373 } 2374 return 1; 2375} 2376 2377/* 2378 * Default method for stopping A-MPDU tx aggregation. 2379 * Any timer is cleared and we drain any pending frames. 2380 */ 2381static void 2382ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 2383{ 2384 /* XXX locking */ 2385 addba_stop_timeout(tap); 2386 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 2387 /* XXX clear aggregation queue */ 2388 tap->txa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_AMSDU); 2389 } 2390 tap->txa_attempts = 0; 2391} 2392 2393/* 2394 * Process a received action frame using the default aggregation 2395 * policy. We intercept ADDBA-related frames and use them to 2396 * update our aggregation state. All other frames are passed up 2397 * for processing by ieee80211_recv_action. 2398 */ 2399static int 2400ht_recv_action_ba_addba_request(struct ieee80211_node *ni, 2401 const struct ieee80211_frame *wh, 2402 const uint8_t *frm, const uint8_t *efrm) 2403{ 2404 struct ieee80211com *ic = ni->ni_ic; 2405 struct ieee80211vap *vap = ni->ni_vap; 2406 struct ieee80211_rx_ampdu *rap; 2407 uint8_t dialogtoken; 2408 uint16_t baparamset, batimeout, baseqctl; 2409 uint16_t args[5]; 2410 int tid; 2411 2412 dialogtoken = frm[2]; 2413 baparamset = le16dec(frm+3); 2414 batimeout = le16dec(frm+5); 2415 baseqctl = le16dec(frm+7); 2416 2417 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2418 2419 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2420 "recv ADDBA request: dialogtoken %u baparamset 0x%x " 2421 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d amsdu %d", 2422 dialogtoken, baparamset, 2423 tid, _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ), 2424 batimeout, 2425 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START), 2426 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_FRAG), 2427 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU)); 2428 2429 rap = &ni->ni_rx_ampdu[tid]; 2430 2431 /* Send ADDBA response */ 2432 args[0] = dialogtoken; 2433 /* 2434 * NB: We ack only if the sta associated with HT and 2435 * the ap is configured to do AMPDU rx (the latter 2436 * violates the 11n spec and is mostly for testing). 2437 */ 2438 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 2439 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 2440 /* XXX TODO: handle ampdu_rx_start failure */ 2441 ic->ic_ampdu_rx_start(ni, rap, 2442 baparamset, batimeout, baseqctl); 2443 2444 args[1] = IEEE80211_STATUS_SUCCESS; 2445 } else { 2446 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2447 ni, "reject ADDBA request: %s", 2448 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 2449 "administratively disabled" : 2450 "not negotiated for station"); 2451 vap->iv_stats.is_addba_reject++; 2452 args[1] = IEEE80211_STATUS_UNSPECIFIED; 2453 } 2454 /* XXX honor rap flags? */ 2455 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2456 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID) 2457 | _IEEE80211_SHIFTMASK(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 2458 ; 2459 2460 /* 2461 * TODO: we're out of iv_flags_ht fields; once 2462 * this is extended we should make this configurable. 2463 */ 2464 if ((baparamset & IEEE80211_BAPS_AMSDU) && 2465 (ni->ni_flags & IEEE80211_NODE_AMSDU_RX) && 2466 (vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU)) 2467 args[2] |= IEEE80211_BAPS_AMSDU; 2468 2469 args[3] = 0; 2470 args[4] = 0; 2471 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2472 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 2473 return 0; 2474} 2475 2476static int 2477ht_recv_action_ba_addba_response(struct ieee80211_node *ni, 2478 const struct ieee80211_frame *wh, 2479 const uint8_t *frm, const uint8_t *efrm) 2480{ 2481 struct ieee80211com *ic = ni->ni_ic; 2482 struct ieee80211vap *vap = ni->ni_vap; 2483 struct ieee80211_tx_ampdu *tap; 2484 uint8_t dialogtoken, policy; 2485 uint16_t baparamset, batimeout, code; 2486 int tid, bufsiz; 2487 int amsdu; 2488 2489 dialogtoken = frm[2]; 2490 code = le16dec(frm+3); 2491 baparamset = le16dec(frm+5); 2492 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2493 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2494 policy = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_POLICY); 2495 amsdu = !! _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU); 2496 batimeout = le16dec(frm+7); 2497 2498 tap = &ni->ni_tx_ampdu[tid]; 2499 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 2500 IEEE80211_DISCARD_MAC(vap, 2501 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2502 ni->ni_macaddr, "ADDBA response", 2503 "no pending ADDBA, tid %d dialogtoken %u " 2504 "code %d", tid, dialogtoken, code); 2505 vap->iv_stats.is_addba_norequest++; 2506 return 0; 2507 } 2508 if (dialogtoken != tap->txa_token) { 2509 IEEE80211_DISCARD_MAC(vap, 2510 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2511 ni->ni_macaddr, "ADDBA response", 2512 "dialogtoken mismatch: waiting for %d, " 2513 "received %d, tid %d code %d", 2514 tap->txa_token, dialogtoken, tid, code); 2515 vap->iv_stats.is_addba_badtoken++; 2516 return 0; 2517 } 2518 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 2519 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 2520 IEEE80211_DISCARD_MAC(vap, 2521 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2522 ni->ni_macaddr, "ADDBA response", 2523 "policy mismatch: expecting %s, " 2524 "received %s, tid %d code %d", 2525 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 2526 policy, tid, code); 2527 vap->iv_stats.is_addba_badpolicy++; 2528 return 0; 2529 } 2530#if 0 2531 /* XXX we take MIN in ieee80211_addba_response */ 2532 if (bufsiz > IEEE80211_AGGR_BAWMAX) { 2533 IEEE80211_DISCARD_MAC(vap, 2534 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2535 ni->ni_macaddr, "ADDBA response", 2536 "BA window too large: max %d, " 2537 "received %d, tid %d code %d", 2538 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 2539 vap->iv_stats.is_addba_badbawinsize++; 2540 return 0; 2541 } 2542#endif 2543 2544 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2545 "recv ADDBA response: dialogtoken %u code %d " 2546 "baparamset 0x%x (tid %d bufsiz %d amsdu %d) batimeout %d", 2547 dialogtoken, code, baparamset, tid, 2548 bufsiz, 2549 amsdu, 2550 batimeout); 2551 ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 2552 return 0; 2553} 2554 2555static int 2556ht_recv_action_ba_delba(struct ieee80211_node *ni, 2557 const struct ieee80211_frame *wh, 2558 const uint8_t *frm, const uint8_t *efrm) 2559{ 2560 struct ieee80211com *ic = ni->ni_ic; 2561 struct ieee80211_rx_ampdu *rap; 2562 struct ieee80211_tx_ampdu *tap; 2563 uint16_t baparamset, code; 2564 int tid; 2565 2566 baparamset = le16dec(frm+2); 2567 code = le16dec(frm+4); 2568 2569 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_TID); 2570 2571 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2572 "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 2573 "code %d", baparamset, tid, 2574 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_INIT), code); 2575 2576 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 2577 tap = &ni->ni_tx_ampdu[tid]; 2578 ic->ic_addba_stop(ni, tap); 2579 } else { 2580 rap = &ni->ni_rx_ampdu[tid]; 2581 ic->ic_ampdu_rx_stop(ni, rap); 2582 } 2583 return 0; 2584} 2585 2586static int 2587ht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 2588 const struct ieee80211_frame *wh, 2589 const uint8_t *frm, const uint8_t *efrm) 2590{ 2591 int chw; 2592 2593 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 2594 2595 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2596 "%s: HT txchwidth, width %d%s", 2597 __func__, chw, ni->ni_chw != chw ? "*" : ""); 2598 if (chw != ni->ni_chw) { 2599 /* XXX does this need to change the ht40 station count? */ 2600 ni->ni_chw = chw; 2601 /* XXX notify on change */ 2602 } 2603 return 0; 2604} 2605 2606static int 2607ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 2608 const struct ieee80211_frame *wh, 2609 const uint8_t *frm, const uint8_t *efrm) 2610{ 2611 const struct ieee80211_action_ht_mimopowersave *mps = 2612 (const struct ieee80211_action_ht_mimopowersave *) frm; 2613 2614 /* XXX check iv_htcaps */ 2615 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2616 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2617 else 2618 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2619 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2620 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2621 else 2622 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2623 /* XXX notify on change */ 2624 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2625 "%s: HT MIMO PS (%s%s)", __func__, 2626 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2627 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2628 ); 2629 return 0; 2630} 2631 2632/* 2633 * Transmit processing. 2634 */ 2635 2636/* 2637 * Check if A-MPDU should be requested/enabled for a stream. 2638 * We require a traffic rate above a per-AC threshold and we 2639 * also handle backoff from previous failed attempts. 2640 * 2641 * Drivers may override this method to bring in information 2642 * such as link state conditions in making the decision. 2643 */ 2644static int 2645ieee80211_ampdu_enable(struct ieee80211_node *ni, 2646 struct ieee80211_tx_ampdu *tap) 2647{ 2648 struct ieee80211vap *vap = ni->ni_vap; 2649 2650 if (tap->txa_avgpps < 2651 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)]) 2652 return 0; 2653 /* XXX check rssi? */ 2654 if (tap->txa_attempts >= ieee80211_addba_maxtries && 2655 ieee80211_time_after(ticks, tap->txa_nextrequest)) { 2656 /* 2657 * Don't retry too often; txa_nextrequest is set 2658 * to the minimum interval we'll retry after 2659 * ieee80211_addba_maxtries failed attempts are made. 2660 */ 2661 return 0; 2662 } 2663 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2664 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d", 2665 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)], 2666 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts); 2667 return 1; 2668} 2669 2670/* 2671 * Request A-MPDU tx aggregation. Setup local state and 2672 * issue an ADDBA request. BA use will only happen after 2673 * the other end replies with ADDBA response. 2674 */ 2675int 2676ieee80211_ampdu_request(struct ieee80211_node *ni, 2677 struct ieee80211_tx_ampdu *tap) 2678{ 2679 struct ieee80211com *ic = ni->ni_ic; 2680 uint16_t args[5]; 2681 int tid, dialogtoken; 2682 static int tokens = 0; /* XXX */ 2683 2684 /* XXX locking */ 2685 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2686 /* do deferred setup of state */ 2687 ampdu_tx_setup(tap); 2688 } 2689 /* XXX hack for not doing proper locking */ 2690 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2691 2692 dialogtoken = (tokens+1) % 63; /* XXX */ 2693 tid = tap->txa_tid; 2694 2695 /* 2696 * XXX TODO: This is racy with any other parallel TX going on. :( 2697 */ 2698 tap->txa_start = ni->ni_txseqs[tid]; 2699 2700 args[0] = dialogtoken; 2701 args[1] = 0; /* NB: status code not used */ 2702 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2703 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID) 2704 | _IEEE80211_SHIFTMASK(IEEE80211_AGGR_BAWMAX, 2705 IEEE80211_BAPS_BUFSIZ) 2706 ; 2707 2708 /* XXX TODO: this should be a flag, not iv_htcaps */ 2709 if ((ni->ni_flags & IEEE80211_NODE_AMSDU_TX) && 2710 (ni->ni_vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU)) 2711 args[2] |= IEEE80211_BAPS_AMSDU; 2712 2713 args[3] = 0; /* batimeout */ 2714 /* NB: do first so there's no race against reply */ 2715 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2716 /* unable to setup state, don't make request */ 2717 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2718 ni, "%s: could not setup BA stream for TID %d AC %d", 2719 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid)); 2720 /* defer next try so we don't slam the driver with requests */ 2721 tap->txa_attempts = ieee80211_addba_maxtries; 2722 /* NB: check in case driver wants to override */ 2723 if (tap->txa_nextrequest <= ticks) 2724 tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2725 return 0; 2726 } 2727 tokens = dialogtoken; /* allocate token */ 2728 /* NB: after calling ic_addba_request so driver can set txa_start */ 2729 args[4] = _IEEE80211_SHIFTMASK(tap->txa_start, IEEE80211_BASEQ_START) 2730 | _IEEE80211_SHIFTMASK(0, IEEE80211_BASEQ_FRAG) 2731 ; 2732 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2733 IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2734} 2735 2736/* 2737 * Terminate an AMPDU tx stream. State is reclaimed 2738 * and the peer notified with a DelBA Action frame. 2739 */ 2740void 2741ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2742 int reason) 2743{ 2744 struct ieee80211com *ic = ni->ni_ic; 2745 struct ieee80211vap *vap = ni->ni_vap; 2746 uint16_t args[4]; 2747 2748 /* XXX locking */ 2749 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2750 if (IEEE80211_AMPDU_RUNNING(tap)) { 2751 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2752 ni, "%s: stop BA stream for TID %d (reason: %d (%s))", 2753 __func__, tap->txa_tid, reason, 2754 ieee80211_reason_to_string(reason)); 2755 vap->iv_stats.is_ampdu_stop++; 2756 2757 ic->ic_addba_stop(ni, tap); 2758 args[0] = tap->txa_tid; 2759 args[1] = IEEE80211_DELBAPS_INIT; 2760 args[2] = reason; /* XXX reason code */ 2761 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2762 IEEE80211_ACTION_BA_DELBA, args); 2763 } else { 2764 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2765 ni, "%s: BA stream for TID %d not running " 2766 "(reason: %d (%s))", __func__, tap->txa_tid, reason, 2767 ieee80211_reason_to_string(reason)); 2768 vap->iv_stats.is_ampdu_stop_failed++; 2769 } 2770} 2771 2772/* XXX */ 2773static void bar_start_timer(struct ieee80211_tx_ampdu *tap); 2774 2775static void 2776bar_timeout(void *arg) 2777{ 2778 struct ieee80211_tx_ampdu *tap = arg; 2779 struct ieee80211_node *ni = tap->txa_ni; 2780 2781 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2782 ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2783 2784 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2785 ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2786 tap->txa_tid, tap->txa_flags, tap->txa_attempts); 2787 2788 /* guard against race with bar_tx_complete */ 2789 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2790 return; 2791 /* XXX ? */ 2792 if (tap->txa_attempts >= ieee80211_bar_maxtries) { 2793 struct ieee80211com *ic = ni->ni_ic; 2794 2795 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++; 2796 /* 2797 * If (at least) the last BAR TX timeout was due to 2798 * an ieee80211_send_bar() failures, then we need 2799 * to make sure we notify the driver that a BAR 2800 * TX did occur and fail. This gives the driver 2801 * a chance to undo any queue pause that may 2802 * have occurred. 2803 */ 2804 ic->ic_bar_response(ni, tap, 1); 2805 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2806 } else { 2807 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++; 2808 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) { 2809 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2810 ni, "%s: failed to TX, starting timer\n", 2811 __func__); 2812 /* 2813 * If ieee80211_send_bar() fails here, the 2814 * timer may have stopped and/or the pending 2815 * flag may be clear. Because of this, 2816 * fake the BARPEND and reset the timer. 2817 * A retransmission attempt will then occur 2818 * during the next timeout. 2819 */ 2820 /* XXX locking */ 2821 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2822 bar_start_timer(tap); 2823 } 2824 } 2825} 2826 2827static void 2828bar_start_timer(struct ieee80211_tx_ampdu *tap) 2829{ 2830 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2831 tap->txa_ni, 2832 "%s: called", 2833 __func__); 2834 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2835} 2836 2837static void 2838bar_stop_timer(struct ieee80211_tx_ampdu *tap) 2839{ 2840 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2841 tap->txa_ni, 2842 "%s: called", 2843 __func__); 2844 callout_stop(&tap->txa_timer); 2845} 2846 2847static void 2848bar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2849{ 2850 struct ieee80211_tx_ampdu *tap = arg; 2851 2852 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2853 ni, "%s: tid %u flags 0x%x pending %d status %d", 2854 __func__, tap->txa_tid, tap->txa_flags, 2855 callout_pending(&tap->txa_timer), status); 2856 2857 ni->ni_vap->iv_stats.is_ampdu_bar_tx++; 2858 /* XXX locking */ 2859 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2860 callout_pending(&tap->txa_timer)) { 2861 struct ieee80211com *ic = ni->ni_ic; 2862 2863 if (status == 0) /* ACK'd */ 2864 bar_stop_timer(tap); 2865 ic->ic_bar_response(ni, tap, status); 2866 /* NB: just let timer expire so we pace requests */ 2867 } 2868} 2869 2870static void 2871ieee80211_bar_response(struct ieee80211_node *ni, 2872 struct ieee80211_tx_ampdu *tap, int status) 2873{ 2874 2875 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2876 tap->txa_ni, 2877 "%s: called", 2878 __func__); 2879 if (status == 0) { /* got ACK */ 2880 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2881 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2882 tap->txa_start, 2883 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2884 tap->txa_qframes, tap->txa_seqpending, 2885 tap->txa_tid); 2886 2887 /* NB: timer already stopped in bar_tx_complete */ 2888 tap->txa_start = tap->txa_seqpending; 2889 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2890 } 2891} 2892 2893/* 2894 * Transmit a BAR frame to the specified node. The 2895 * BAR contents are drawn from the supplied aggregation 2896 * state associated with the node. 2897 * 2898 * NB: we only handle immediate ACK w/ compressed bitmap. 2899 */ 2900int 2901ieee80211_send_bar(struct ieee80211_node *ni, 2902 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2903{ 2904#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2905 struct ieee80211vap *vap = ni->ni_vap; 2906 struct ieee80211com *ic = ni->ni_ic; 2907 struct ieee80211_frame_bar *bar; 2908 struct mbuf *m; 2909 uint16_t barctl, barseqctl; 2910 uint8_t *frm; 2911 int tid, ret; 2912 2913 2914 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2915 tap->txa_ni, 2916 "%s: called", 2917 __func__); 2918 2919 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2920 /* no ADDBA response, should not happen */ 2921 /* XXX stat+msg */ 2922 return EINVAL; 2923 } 2924 /* XXX locking */ 2925 bar_stop_timer(tap); 2926 2927 ieee80211_ref_node(ni); 2928 2929 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2930 if (m == NULL) 2931 senderr(ENOMEM, is_tx_nobuf); 2932 2933 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2934 m_freem(m); 2935 senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2936 /* NOTREACHED */ 2937 } 2938 2939 bar = mtod(m, struct ieee80211_frame_bar *); 2940 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2941 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2942 bar->i_fc[1] = 0; 2943 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2944 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2945 2946 tid = tap->txa_tid; 2947 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2948 0 : IEEE80211_BAR_NOACK) 2949 | IEEE80211_BAR_COMP 2950 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAR_TID) 2951 ; 2952 barseqctl = _IEEE80211_SHIFTMASK(seq, IEEE80211_BAR_SEQ_START); 2953 /* NB: known to have proper alignment */ 2954 bar->i_ctl = htole16(barctl); 2955 bar->i_seq = htole16(barseqctl); 2956 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2957 2958 M_WME_SETAC(m, WME_AC_VO); 2959 2960 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2961 2962 /* XXX locking */ 2963 /* init/bump attempts counter */ 2964 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2965 tap->txa_attempts = 1; 2966 else 2967 tap->txa_attempts++; 2968 tap->txa_seqpending = seq; 2969 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2970 2971 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2972 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2973 tid, barctl, seq, tap->txa_attempts); 2974 2975 /* 2976 * ic_raw_xmit will free the node reference 2977 * regardless of queue/TX success or failure. 2978 */ 2979 IEEE80211_TX_LOCK(ic); 2980 ret = ieee80211_raw_output(vap, ni, m, NULL); 2981 IEEE80211_TX_UNLOCK(ic); 2982 if (ret != 0) { 2983 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2984 ni, "send BAR: failed: (ret = %d)\n", 2985 ret); 2986 /* xmit failed, clear state flag */ 2987 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2988 vap->iv_stats.is_ampdu_bar_tx_fail++; 2989 return ret; 2990 } 2991 /* XXX hack against tx complete happening before timer is started */ 2992 if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2993 bar_start_timer(tap); 2994 return 0; 2995bad: 2996 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2997 tap->txa_ni, 2998 "%s: bad! ret=%d", 2999 __func__, ret); 3000 vap->iv_stats.is_ampdu_bar_tx_fail++; 3001 ieee80211_free_node(ni); 3002 return ret; 3003#undef senderr 3004} 3005 3006static int 3007ht_action_output(struct ieee80211_node *ni, struct mbuf *m) 3008{ 3009 struct ieee80211_bpf_params params; 3010 3011 memset(¶ms, 0, sizeof(params)); 3012 params.ibp_pri = WME_AC_VO; 3013 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 3014 /* NB: we know all frames are unicast */ 3015 params.ibp_try0 = ni->ni_txparms->maxretry; 3016 params.ibp_power = ni->ni_txpower; 3017 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 3018 ¶ms); 3019} 3020 3021#define ADDSHORT(frm, v) do { \ 3022 frm[0] = (v) & 0xff; \ 3023 frm[1] = (v) >> 8; \ 3024 frm += 2; \ 3025} while (0) 3026 3027/* 3028 * Send an action management frame. The arguments are stuff 3029 * into a frame without inspection; the caller is assumed to 3030 * prepare them carefully (e.g. based on the aggregation state). 3031 */ 3032static int 3033ht_send_action_ba_addba(struct ieee80211_node *ni, 3034 int category, int action, void *arg0) 3035{ 3036 struct ieee80211vap *vap = ni->ni_vap; 3037 struct ieee80211com *ic = ni->ni_ic; 3038 uint16_t *args = arg0; 3039 struct mbuf *m; 3040 uint8_t *frm; 3041 3042 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3043 "send ADDBA %s: dialogtoken %d status %d " 3044 "baparamset 0x%x (tid %d amsdu %d) batimeout 0x%x baseqctl 0x%x", 3045 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 3046 "request" : "response", args[0], args[1], args[2], 3047 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_TID), 3048 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_AMSDU), 3049 args[3], args[4]); 3050 3051 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3052 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3053 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3054 ieee80211_ref_node(ni); 3055 3056 m = ieee80211_getmgtframe(&frm, 3057 ic->ic_headroom + sizeof(struct ieee80211_frame), 3058 sizeof(uint16_t) /* action+category */ 3059 /* XXX may action payload */ 3060 + sizeof(struct ieee80211_action_ba_addbaresponse) 3061 ); 3062 if (m != NULL) { 3063 *frm++ = category; 3064 *frm++ = action; 3065 *frm++ = args[0]; /* dialog token */ 3066 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 3067 ADDSHORT(frm, args[1]); /* status code */ 3068 ADDSHORT(frm, args[2]); /* baparamset */ 3069 ADDSHORT(frm, args[3]); /* batimeout */ 3070 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 3071 ADDSHORT(frm, args[4]); /* baseqctl */ 3072 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3073 return ht_action_output(ni, m); 3074 } else { 3075 vap->iv_stats.is_tx_nobuf++; 3076 ieee80211_free_node(ni); 3077 return ENOMEM; 3078 } 3079} 3080 3081static int 3082ht_send_action_ba_delba(struct ieee80211_node *ni, 3083 int category, int action, void *arg0) 3084{ 3085 struct ieee80211vap *vap = ni->ni_vap; 3086 struct ieee80211com *ic = ni->ni_ic; 3087 uint16_t *args = arg0; 3088 struct mbuf *m; 3089 uint16_t baparamset; 3090 uint8_t *frm; 3091 3092 baparamset = _IEEE80211_SHIFTMASK(args[0], IEEE80211_DELBAPS_TID) 3093 | args[1] 3094 ; 3095 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3096 "send DELBA action: tid %d, initiator %d reason %d (%s)", 3097 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 3098 3099 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3100 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3101 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3102 ieee80211_ref_node(ni); 3103 3104 m = ieee80211_getmgtframe(&frm, 3105 ic->ic_headroom + sizeof(struct ieee80211_frame), 3106 sizeof(uint16_t) /* action+category */ 3107 /* XXX may action payload */ 3108 + sizeof(struct ieee80211_action_ba_addbaresponse) 3109 ); 3110 if (m != NULL) { 3111 *frm++ = category; 3112 *frm++ = action; 3113 ADDSHORT(frm, baparamset); 3114 ADDSHORT(frm, args[2]); /* reason code */ 3115 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3116 return ht_action_output(ni, m); 3117 } else { 3118 vap->iv_stats.is_tx_nobuf++; 3119 ieee80211_free_node(ni); 3120 return ENOMEM; 3121 } 3122} 3123 3124static int 3125ht_send_action_ht_txchwidth(struct ieee80211_node *ni, 3126 int category, int action, void *arg0) 3127{ 3128 struct ieee80211vap *vap = ni->ni_vap; 3129 struct ieee80211com *ic = ni->ni_ic; 3130 struct mbuf *m; 3131 uint8_t *frm; 3132 3133 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3134 "send HT txchwidth: width %d", 3135 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 3136 3137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3138 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3139 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3140 ieee80211_ref_node(ni); 3141 3142 m = ieee80211_getmgtframe(&frm, 3143 ic->ic_headroom + sizeof(struct ieee80211_frame), 3144 sizeof(uint16_t) /* action+category */ 3145 /* XXX may action payload */ 3146 + sizeof(struct ieee80211_action_ba_addbaresponse) 3147 ); 3148 if (m != NULL) { 3149 *frm++ = category; 3150 *frm++ = action; 3151 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 3152 IEEE80211_A_HT_TXCHWIDTH_2040 : 3153 IEEE80211_A_HT_TXCHWIDTH_20; 3154 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3155 return ht_action_output(ni, m); 3156 } else { 3157 vap->iv_stats.is_tx_nobuf++; 3158 ieee80211_free_node(ni); 3159 return ENOMEM; 3160 } 3161} 3162#undef ADDSHORT 3163 3164/* 3165 * Construct the MCS bit mask for inclusion in an HT capabilities 3166 * information element. 3167 */ 3168static void 3169ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 3170{ 3171 int i; 3172 uint8_t txparams; 3173 3174 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 3175 ("ic_rxstream %d out of range", ic->ic_rxstream)); 3176 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 3177 ("ic_txstream %d out of range", ic->ic_txstream)); 3178 3179 for (i = 0; i < ic->ic_rxstream * 8; i++) 3180 setbit(frm, i); 3181 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 3182 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 3183 setbit(frm, 32); 3184 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 3185 if (ic->ic_rxstream >= 2) { 3186 for (i = 33; i <= 38; i++) 3187 setbit(frm, i); 3188 } 3189 if (ic->ic_rxstream >= 3) { 3190 for (i = 39; i <= 52; i++) 3191 setbit(frm, i); 3192 } 3193 if (ic->ic_txstream >= 4) { 3194 for (i = 53; i <= 76; i++) 3195 setbit(frm, i); 3196 } 3197 } 3198 3199 if (ic->ic_rxstream != ic->ic_txstream) { 3200 txparams = 0x1; /* TX MCS set defined */ 3201 txparams |= 0x2; /* TX RX MCS not equal */ 3202 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 3203 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 3204 txparams |= 0x16; /* TX unequal modulation sup */ 3205 } else 3206 txparams = 0; 3207 frm[12] = txparams; 3208} 3209 3210/* 3211 * Add body of an HTCAP information element. 3212 */ 3213static uint8_t * 3214ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 3215{ 3216#define ADDSHORT(frm, v) do { \ 3217 frm[0] = (v) & 0xff; \ 3218 frm[1] = (v) >> 8; \ 3219 frm += 2; \ 3220} while (0) 3221 struct ieee80211com *ic = ni->ni_ic; 3222 struct ieee80211vap *vap = ni->ni_vap; 3223 uint16_t caps, extcaps; 3224 int rxmax, density; 3225 3226 /* HT capabilities */ 3227 caps = vap->iv_htcaps & 0xffff; 3228 /* 3229 * Note channel width depends on whether we are operating as 3230 * a sta or not. When operating as a sta we are generating 3231 * a request based on our desired configuration. Otherwise 3232 * we are operational and the channel attributes identify 3233 * how we've been setup (which might be different if a fixed 3234 * channel is specified). 3235 */ 3236 if (vap->iv_opmode == IEEE80211_M_STA) { 3237 /* override 20/40 use based on config */ 3238 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 3239 caps |= IEEE80211_HTCAP_CHWIDTH40; 3240 else 3241 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3242 3243 /* Start by using the advertised settings */ 3244 rxmax = _IEEE80211_MASKSHIFT(ni->ni_htparam, 3245 IEEE80211_HTCAP_MAXRXAMPDU); 3246 density = _IEEE80211_MASKSHIFT(ni->ni_htparam, 3247 IEEE80211_HTCAP_MPDUDENSITY); 3248 3249 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N, 3250 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n", 3251 __func__, 3252 rxmax, 3253 density, 3254 vap->iv_ampdu_rxmax, 3255 vap->iv_ampdu_density); 3256 3257 /* Cap at VAP rxmax */ 3258 if (rxmax > vap->iv_ampdu_rxmax) 3259 rxmax = vap->iv_ampdu_rxmax; 3260 3261 /* 3262 * If the VAP ampdu density value greater, use that. 3263 * 3264 * (Larger density value == larger minimum gap between A-MPDU 3265 * subframes.) 3266 */ 3267 if (vap->iv_ampdu_density > density) 3268 density = vap->iv_ampdu_density; 3269 3270 /* 3271 * NB: Hardware might support HT40 on some but not all 3272 * channels. We can't determine this earlier because only 3273 * after association the channel is upgraded to HT based 3274 * on the negotiated capabilities. 3275 */ 3276 if (ni->ni_chan != IEEE80211_CHAN_ANYC && 3277 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL && 3278 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL) 3279 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3280 } else { 3281 /* override 20/40 use based on current channel */ 3282 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3283 caps |= IEEE80211_HTCAP_CHWIDTH40; 3284 else 3285 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3286 3287 /* XXX TODO should it start by using advertised settings? */ 3288 rxmax = vap->iv_ampdu_rxmax; 3289 density = vap->iv_ampdu_density; 3290 } 3291 3292 /* adjust short GI based on channel and config */ 3293 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3294 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3295 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3296 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3297 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3298 3299 /* adjust STBC based on receive capabilities */ 3300 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0) 3301 caps &= ~IEEE80211_HTCAP_RXSTBC; 3302 3303 /* adjust LDPC based on receive capabilites */ 3304 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0) 3305 caps &= ~IEEE80211_HTCAP_LDPC; 3306 3307 ADDSHORT(frm, caps); 3308 3309 /* HT parameters */ 3310 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3311 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY) 3312 ; 3313 frm++; 3314 3315 /* pre-zero remainder of ie */ 3316 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3317 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3318 3319 /* supported MCS set */ 3320 /* 3321 * XXX: For sta mode the rate set should be restricted based 3322 * on the AP's capabilities, but ni_htrates isn't setup when 3323 * we're called to form an AssocReq frame so for now we're 3324 * restricted to the device capabilities. 3325 */ 3326 ieee80211_set_mcsset(ni->ni_ic, frm); 3327 3328 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3329 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3330 3331 /* HT extended capabilities */ 3332 extcaps = vap->iv_htextcaps & 0xffff; 3333 3334 ADDSHORT(frm, extcaps); 3335 3336 frm += sizeof(struct ieee80211_ie_htcap) - 3337 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3338 3339 return frm; 3340#undef ADDSHORT 3341} 3342 3343/* 3344 * Add 802.11n HT capabilities information element 3345 */ 3346uint8_t * 3347ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 3348{ 3349 frm[0] = IEEE80211_ELEMID_HTCAP; 3350 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3351 return ieee80211_add_htcap_body(frm + 2, ni); 3352} 3353 3354/* 3355 * Non-associated probe request - add HT capabilities based on 3356 * the current channel configuration. 3357 */ 3358static uint8_t * 3359ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap, 3360 struct ieee80211_channel *c) 3361{ 3362#define ADDSHORT(frm, v) do { \ 3363 frm[0] = (v) & 0xff; \ 3364 frm[1] = (v) >> 8; \ 3365 frm += 2; \ 3366} while (0) 3367 struct ieee80211com *ic = vap->iv_ic; 3368 uint16_t caps, extcaps; 3369 int rxmax, density; 3370 3371 /* HT capabilities */ 3372 caps = vap->iv_htcaps & 0xffff; 3373 3374 /* 3375 * We don't use this in STA mode; only in IBSS mode. 3376 * So in IBSS mode we base our HTCAP flags on the 3377 * given channel. 3378 */ 3379 3380 /* override 20/40 use based on current channel */ 3381 if (IEEE80211_IS_CHAN_HT40(c)) 3382 caps |= IEEE80211_HTCAP_CHWIDTH40; 3383 else 3384 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3385 3386 /* Use the currently configured values */ 3387 rxmax = vap->iv_ampdu_rxmax; 3388 density = vap->iv_ampdu_density; 3389 3390 /* adjust short GI based on channel and config */ 3391 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3392 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3393 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3394 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3395 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3396 ADDSHORT(frm, caps); 3397 3398 /* HT parameters */ 3399 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3400 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY) 3401 ; 3402 frm++; 3403 3404 /* pre-zero remainder of ie */ 3405 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3406 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3407 3408 /* supported MCS set */ 3409 /* 3410 * XXX: For sta mode the rate set should be restricted based 3411 * on the AP's capabilities, but ni_htrates isn't setup when 3412 * we're called to form an AssocReq frame so for now we're 3413 * restricted to the device capabilities. 3414 */ 3415 ieee80211_set_mcsset(ic, frm); 3416 3417 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3418 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3419 3420 /* HT extended capabilities */ 3421 extcaps = vap->iv_htextcaps & 0xffff; 3422 3423 ADDSHORT(frm, extcaps); 3424 3425 frm += sizeof(struct ieee80211_ie_htcap) - 3426 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3427 3428 return frm; 3429#undef ADDSHORT 3430} 3431 3432/* 3433 * Add 802.11n HT capabilities information element 3434 */ 3435uint8_t * 3436ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap, 3437 struct ieee80211_channel *c) 3438{ 3439 frm[0] = IEEE80211_ELEMID_HTCAP; 3440 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3441 return ieee80211_add_htcap_body_ch(frm + 2, vap, c); 3442} 3443 3444/* 3445 * Add Broadcom OUI wrapped standard HTCAP ie; this is 3446 * used for compatibility w/ pre-draft implementations. 3447 */ 3448uint8_t * 3449ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 3450{ 3451 frm[0] = IEEE80211_ELEMID_VENDOR; 3452 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 3453 frm[2] = (BCM_OUI >> 0) & 0xff; 3454 frm[3] = (BCM_OUI >> 8) & 0xff; 3455 frm[4] = (BCM_OUI >> 16) & 0xff; 3456 frm[5] = BCM_OUI_HTCAP; 3457 return ieee80211_add_htcap_body(frm + 6, ni); 3458} 3459 3460/* 3461 * Construct the MCS bit mask of basic rates 3462 * for inclusion in an HT information element. 3463 */ 3464static void 3465ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 3466{ 3467 int i; 3468 3469 for (i = 0; i < rs->rs_nrates; i++) { 3470 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 3471 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 3472 r < IEEE80211_HTRATE_MAXSIZE) { 3473 /* NB: this assumes a particular implementation */ 3474 setbit(frm, r); 3475 } 3476 } 3477} 3478 3479/* 3480 * Update the HTINFO ie for a beacon frame. 3481 */ 3482void 3483ieee80211_ht_update_beacon(struct ieee80211vap *vap, 3484 struct ieee80211_beacon_offsets *bo) 3485{ 3486#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 3487 struct ieee80211_node *ni; 3488 const struct ieee80211_channel *bsschan; 3489 struct ieee80211com *ic = vap->iv_ic; 3490 struct ieee80211_ie_htinfo *ht = 3491 (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 3492 3493 ni = ieee80211_ref_node(vap->iv_bss); 3494 bsschan = ni->ni_chan; 3495 3496 /* XXX only update on channel change */ 3497 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 3498 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3499 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 3500 else 3501 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 3502 if (IEEE80211_IS_CHAN_HT40U(bsschan)) 3503 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3504 else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 3505 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3506 else 3507 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 3508 if (IEEE80211_IS_CHAN_HT40(bsschan)) 3509 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 3510 3511 /* protection mode */ 3512 /* 3513 * XXX TODO: this uses the global flag, not the per-VAP flag. 3514 * Eventually (once the protection modes are done per-channel 3515 * rather than per-VAP) we can flip this over to be per-VAP but 3516 * using the channel protection mode. 3517 */ 3518 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 3519 3520 ieee80211_free_node(ni); 3521 3522 /* XXX propagate to vendor ie's */ 3523#undef PROTMODE 3524} 3525 3526/* 3527 * Add body of an HTINFO information element. 3528 * 3529 * NB: We don't use struct ieee80211_ie_htinfo because we can 3530 * be called to fillin both a standard ie and a compat ie that 3531 * has a vendor OUI at the front. 3532 */ 3533static uint8_t * 3534ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 3535{ 3536 struct ieee80211vap *vap = ni->ni_vap; 3537 struct ieee80211com *ic = ni->ni_ic; 3538 3539 /* pre-zero remainder of ie */ 3540 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 3541 3542 /* primary/control channel center */ 3543 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3544 3545 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3546 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 3547 else 3548 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 3549 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 3550 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3551 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 3552 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3553 else 3554 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 3555 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3556 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 3557 3558 /* 3559 * Add current protection mode. Unlike for beacons, 3560 * this will respect the per-VAP flags. 3561 */ 3562 frm[1] = vap->iv_curhtprotmode; 3563 3564 frm += 5; 3565 3566 /* basic MCS set */ 3567 ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 3568 frm += sizeof(struct ieee80211_ie_htinfo) - 3569 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 3570 return frm; 3571} 3572 3573/* 3574 * Add 802.11n HT information element. 3575 */ 3576uint8_t * 3577ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 3578{ 3579 frm[0] = IEEE80211_ELEMID_HTINFO; 3580 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 3581 return ieee80211_add_htinfo_body(frm + 2, ni); 3582} 3583 3584/* 3585 * Add Broadcom OUI wrapped standard HTINFO ie; this is 3586 * used for compatibility w/ pre-draft implementations. 3587 */ 3588uint8_t * 3589ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 3590{ 3591 frm[0] = IEEE80211_ELEMID_VENDOR; 3592 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 3593 frm[2] = (BCM_OUI >> 0) & 0xff; 3594 frm[3] = (BCM_OUI >> 8) & 0xff; 3595 frm[4] = (BCM_OUI >> 16) & 0xff; 3596 frm[5] = BCM_OUI_HTINFO; 3597 return ieee80211_add_htinfo_body(frm + 6, ni); 3598} 3599