2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * IEEE 802.11n protocol support.
38 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/systm.h>
42 #include <sys/endian.h>
44 #include <sys/socket.h>
47 #include <net/if_var.h>
48 #include <net/if_media.h>
49 #include <net/ethernet.h>
51 #include <net80211/ieee80211_var.h>
52 #include <net80211/ieee80211_action.h>
53 #include <net80211/ieee80211_input.h>
55 /* define here, used throughout file */
56 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
57 #define SM(_v, _f) (((_v) << _f##_S) & _f)
59 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
60 { 13, 14, 27, 30 }, /* MCS 0 */
61 { 26, 29, 54, 60 }, /* MCS 1 */
62 { 39, 43, 81, 90 }, /* MCS 2 */
63 { 52, 58, 108, 120 }, /* MCS 3 */
64 { 78, 87, 162, 180 }, /* MCS 4 */
65 { 104, 116, 216, 240 }, /* MCS 5 */
66 { 117, 130, 243, 270 }, /* MCS 6 */
67 { 130, 144, 270, 300 }, /* MCS 7 */
68 { 26, 29, 54, 60 }, /* MCS 8 */
69 { 52, 58, 108, 120 }, /* MCS 9 */
70 { 78, 87, 162, 180 }, /* MCS 10 */
71 { 104, 116, 216, 240 }, /* MCS 11 */
72 { 156, 173, 324, 360 }, /* MCS 12 */
73 { 208, 231, 432, 480 }, /* MCS 13 */
74 { 234, 260, 486, 540 }, /* MCS 14 */
75 { 260, 289, 540, 600 }, /* MCS 15 */
76 { 39, 43, 81, 90 }, /* MCS 16 */
77 { 78, 87, 162, 180 }, /* MCS 17 */
78 { 117, 130, 243, 270 }, /* MCS 18 */
79 { 156, 173, 324, 360 }, /* MCS 19 */
80 { 234, 260, 486, 540 }, /* MCS 20 */
81 { 312, 347, 648, 720 }, /* MCS 21 */
82 { 351, 390, 729, 810 }, /* MCS 22 */
83 { 390, 433, 810, 900 }, /* MCS 23 */
84 { 52, 58, 108, 120 }, /* MCS 24 */
85 { 104, 116, 216, 240 }, /* MCS 25 */
86 { 156, 173, 324, 360 }, /* MCS 26 */
87 { 208, 231, 432, 480 }, /* MCS 27 */
88 { 312, 347, 648, 720 }, /* MCS 28 */
89 { 416, 462, 864, 960 }, /* MCS 29 */
90 { 468, 520, 972, 1080 }, /* MCS 30 */
91 { 520, 578, 1080, 1200 }, /* MCS 31 */
92 { 0, 0, 12, 13 }, /* MCS 32 */
93 { 78, 87, 162, 180 }, /* MCS 33 */
94 { 104, 116, 216, 240 }, /* MCS 34 */
95 { 130, 144, 270, 300 }, /* MCS 35 */
96 { 117, 130, 243, 270 }, /* MCS 36 */
97 { 156, 173, 324, 360 }, /* MCS 37 */
98 { 195, 217, 405, 450 }, /* MCS 38 */
99 { 104, 116, 216, 240 }, /* MCS 39 */
100 { 130, 144, 270, 300 }, /* MCS 40 */
101 { 130, 144, 270, 300 }, /* MCS 41 */
102 { 156, 173, 324, 360 }, /* MCS 42 */
103 { 182, 202, 378, 420 }, /* MCS 43 */
104 { 182, 202, 378, 420 }, /* MCS 44 */
105 { 208, 231, 432, 480 }, /* MCS 45 */
106 { 156, 173, 324, 360 }, /* MCS 46 */
107 { 195, 217, 405, 450 }, /* MCS 47 */
108 { 195, 217, 405, 450 }, /* MCS 48 */
109 { 234, 260, 486, 540 }, /* MCS 49 */
110 { 273, 303, 567, 630 }, /* MCS 50 */
111 { 273, 303, 567, 630 }, /* MCS 51 */
112 { 312, 347, 648, 720 }, /* MCS 52 */
113 { 130, 144, 270, 300 }, /* MCS 53 */
114 { 156, 173, 324, 360 }, /* MCS 54 */
115 { 182, 202, 378, 420 }, /* MCS 55 */
116 { 156, 173, 324, 360 }, /* MCS 56 */
117 { 182, 202, 378, 420 }, /* MCS 57 */
118 { 208, 231, 432, 480 }, /* MCS 58 */
119 { 234, 260, 486, 540 }, /* MCS 59 */
120 { 208, 231, 432, 480 }, /* MCS 60 */
121 { 234, 260, 486, 540 }, /* MCS 61 */
122 { 260, 289, 540, 600 }, /* MCS 62 */
123 { 260, 289, 540, 600 }, /* MCS 63 */
124 { 286, 318, 594, 660 }, /* MCS 64 */
125 { 195, 217, 405, 450 }, /* MCS 65 */
126 { 234, 260, 486, 540 }, /* MCS 66 */
127 { 273, 303, 567, 630 }, /* MCS 67 */
128 { 234, 260, 486, 540 }, /* MCS 68 */
129 { 273, 303, 567, 630 }, /* MCS 69 */
130 { 312, 347, 648, 720 }, /* MCS 70 */
131 { 351, 390, 729, 810 }, /* MCS 71 */
132 { 312, 347, 648, 720 }, /* MCS 72 */
133 { 351, 390, 729, 810 }, /* MCS 73 */
134 { 390, 433, 810, 900 }, /* MCS 74 */
135 { 390, 433, 810, 900 }, /* MCS 75 */
136 { 429, 477, 891, 990 }, /* MCS 76 */
139 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
140 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
141 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
142 "AMPDU max reorder age (ms)");
144 static int ieee80211_recv_bar_ena = 1;
145 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
146 0, "BAR frame processing (ena/dis)");
148 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
149 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
150 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
151 "ADDBA request timeout (ms)");
152 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
153 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
154 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
155 "ADDBA request backoff (ms)");
156 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
157 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW,
158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
160 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
161 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
163 static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
164 static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
165 static ieee80211_recv_action_func ht_recv_action_ba_delba;
166 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
167 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
169 static ieee80211_send_action_func ht_send_action_ba_addba;
170 static ieee80211_send_action_func ht_send_action_ba_delba;
171 static ieee80211_send_action_func ht_send_action_ht_txchwidth;
174 ieee80211_ht_init(void)
177 * Setup HT parameters that depends on the clock frequency.
179 ieee80211_ampdu_age = msecs_to_ticks(500);
180 ieee80211_addba_timeout = msecs_to_ticks(250);
181 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
182 ieee80211_bar_timeout = msecs_to_ticks(250);
184 * Register action frame handlers.
186 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
187 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
193 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
197 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
198 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
204 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
206 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
208 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
209 struct ieee80211_tx_ampdu *tap);
210 static int ieee80211_addba_request(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap,
212 int dialogtoken, int baparamset, int batimeout);
213 static int ieee80211_addba_response(struct ieee80211_node *ni,
214 struct ieee80211_tx_ampdu *tap,
215 int code, int baparamset, int batimeout);
216 static void ieee80211_addba_stop(struct ieee80211_node *ni,
217 struct ieee80211_tx_ampdu *tap);
218 static void null_addba_response_timeout(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
221 static void ieee80211_bar_response(struct ieee80211_node *ni,
222 struct ieee80211_tx_ampdu *tap, int status);
223 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
224 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
225 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
226 int baparamset, int batimeout, int baseqctl);
227 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
230 ieee80211_ht_attach(struct ieee80211com *ic)
232 /* setup default aggregation policy */
233 ic->ic_recv_action = ieee80211_recv_action;
234 ic->ic_send_action = ieee80211_send_action;
235 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
236 ic->ic_addba_request = ieee80211_addba_request;
237 ic->ic_addba_response = ieee80211_addba_response;
238 ic->ic_addba_response_timeout = null_addba_response_timeout;
239 ic->ic_addba_stop = ieee80211_addba_stop;
240 ic->ic_bar_response = ieee80211_bar_response;
241 ic->ic_ampdu_rx_start = ampdu_rx_start;
242 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
244 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
245 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
249 ieee80211_ht_detach(struct ieee80211com *ic)
254 ieee80211_ht_vattach(struct ieee80211vap *vap)
257 /* driver can override defaults */
258 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
259 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
260 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
261 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
262 /* tx aggregation traffic thresholds */
263 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
264 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
265 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
266 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
268 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
270 * Device is HT capable; enable all HT-related
271 * facilities by default.
272 * XXX these choices may be too aggressive.
274 vap->iv_flags_ht |= IEEE80211_FHT_HT
275 | IEEE80211_FHT_HTCOMPAT
277 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
278 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
279 /* XXX infer from channel list? */
280 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
281 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
282 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
283 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
285 /* enable RIFS if capable */
286 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
287 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
289 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
290 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
291 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
292 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
293 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
294 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
295 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
297 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC)
298 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX;
299 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC)
300 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX;
302 /* NB: disable default legacy WDS, too many issues right now */
303 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
304 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
308 ieee80211_ht_vdetach(struct ieee80211vap *vap)
313 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode,
318 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
319 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
323 rate = ieee80211_htrates[index].ht20_rate_800ns;
326 rate = ieee80211_htrates[index].ht20_rate_400ns;
329 rate = ieee80211_htrates[index].ht40_rate_800ns;
332 rate = ieee80211_htrates[index].ht40_rate_400ns;
338 static struct printranges {
349 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
350 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
351 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
352 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
357 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype)
359 int minrate, maxrate;
360 struct printranges *range;
362 for (range = ranges; range->txstream != 0; range++) {
363 if (ic->ic_txstream < range->txstream)
365 if (range->htcapflags &&
366 (ic->ic_htcaps & range->htcapflags) == 0)
368 if (ratetype < range->ratetype)
370 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
371 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
373 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
374 range->minmcs, range->maxmcs,
375 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
376 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
378 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs,
379 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
385 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
387 const char *modestr = ieee80211_phymode_name[mode];
389 ic_printf(ic, "%s MCS 20MHz\n", modestr);
390 ht_rateprint(ic, mode, 0);
391 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
392 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr);
393 ht_rateprint(ic, mode, 1);
395 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
396 ic_printf(ic, "%s MCS 40MHz:\n", modestr);
397 ht_rateprint(ic, mode, 2);
399 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
400 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
401 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr);
402 ht_rateprint(ic, mode, 3);
407 ieee80211_ht_announce(struct ieee80211com *ic)
410 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
411 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
412 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
413 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
414 ht_announce(ic, IEEE80211_MODE_11NA);
415 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
416 ht_announce(ic, IEEE80211_MODE_11NG);
419 static struct ieee80211_htrateset htrateset;
421 const struct ieee80211_htrateset *
422 ieee80211_get_suphtrates(struct ieee80211com *ic,
423 const struct ieee80211_channel *c)
425 #define ADDRATE(x) do { \
426 htrateset.rs_rates[htrateset.rs_nrates] = x; \
427 htrateset.rs_nrates++; \
431 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset));
432 for (i = 0; i < ic->ic_txstream * 8; i++)
434 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
435 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
437 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
438 if (ic->ic_txstream >= 2) {
439 for (i = 33; i <= 38; i++)
442 if (ic->ic_txstream >= 3) {
443 for (i = 39; i <= 52; i++)
446 if (ic->ic_txstream == 4) {
447 for (i = 53; i <= 76; i++)
456 * Receive processing.
460 * Decap the encapsulated A-MSDU frames and dispatch all but
461 * the last for delivery. The last frame is returned for
462 * delivery via the normal path.
465 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
467 struct ieee80211vap *vap = ni->ni_vap;
471 /* discard 802.3 header inserted by ieee80211_decap */
472 m_adj(m, sizeof(struct ether_header));
474 vap->iv_stats.is_amsdu_decap++;
478 * Decap the first frame, bust it apart from the
479 * remainder and deliver. We leave the last frame
480 * delivery to the caller (for consistency with other
481 * code paths, could also do it here).
483 m = ieee80211_decap1(m, &framelen);
485 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
486 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
487 vap->iv_stats.is_amsdu_tooshort++;
490 if (m->m_pkthdr.len == framelen)
492 n = m_split(m, framelen, M_NOWAIT);
494 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
495 ni->ni_macaddr, "a-msdu",
496 "%s", "unable to split encapsulated frames");
497 vap->iv_stats.is_amsdu_split++;
498 m_freem(m); /* NB: must reclaim */
501 vap->iv_deliver_data(vap, ni, m);
504 * Remove frame contents; each intermediate frame
505 * is required to be aligned to a 4-byte boundary.
508 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
510 return m; /* last delivered by caller */
514 * Purge all frames in the A-MPDU re-order queue.
517 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
522 for (i = 0; i < rap->rxa_wnd; i++) {
525 rap->rxa_m[i] = NULL;
526 rap->rxa_qbytes -= m->m_pkthdr.len;
528 if (--rap->rxa_qframes == 0)
532 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
533 ("lost %u data, %u frames on ampdu rx q",
534 rap->rxa_qbytes, rap->rxa_qframes));
538 * Start A-MPDU rx/re-order processing for the specified TID.
541 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
542 int baparamset, int batimeout, int baseqctl)
544 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
546 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
548 * AMPDU previously setup and not terminated with a DELBA,
549 * flush the reorder q's in case anything remains.
553 memset(rap, 0, sizeof(*rap));
554 rap->rxa_wnd = (bufsiz == 0) ?
555 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
556 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
557 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
563 * Public function; manually setup the RX ampdu state.
566 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw)
568 struct ieee80211_rx_ampdu *rap;
570 /* XXX TODO: sanity check tid, seq, baw */
572 rap = &ni->ni_rx_ampdu[tid];
574 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
576 * AMPDU previously setup and not terminated with a DELBA,
577 * flush the reorder q's in case anything remains.
582 memset(rap, 0, sizeof(*rap));
583 rap->rxa_wnd = (baw== 0) ?
584 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX);
585 rap->rxa_start = seq;
586 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
588 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
589 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x\n",
600 * Stop A-MPDU rx processing for the specified TID.
603 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
607 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND);
611 * Dispatch a frame from the A-MPDU reorder queue. The
612 * frame is fed back into ieee80211_input marked with an
613 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
614 * permits ieee80211_input to optimize re-processing).
617 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
619 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
620 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
621 (void) ieee80211_input(ni, m, 0, 0);
625 * Dispatch as many frames as possible from the re-order queue.
626 * Frames will always be "at the front"; we process all frames
627 * up to the first empty slot in the window. On completion we
628 * cleanup state if there are still pending frames in the current
629 * BA window. We assume the frame at slot 0 is already handled
630 * by the caller; we always start at slot 1.
633 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
635 struct ieee80211vap *vap = ni->ni_vap;
639 /* flush run of frames */
640 for (i = 1; i < rap->rxa_wnd; i++) {
644 rap->rxa_m[i] = NULL;
645 rap->rxa_qbytes -= m->m_pkthdr.len;
648 ampdu_dispatch(ni, m);
651 * If frames remain, copy the mbuf pointers down so
652 * they correspond to the offsets in the new window.
654 if (rap->rxa_qframes != 0) {
655 int n = rap->rxa_qframes, j;
656 for (j = i+1; j < rap->rxa_wnd; j++) {
657 if (rap->rxa_m[j] != NULL) {
658 rap->rxa_m[j-i] = rap->rxa_m[j];
659 rap->rxa_m[j] = NULL;
664 KASSERT(n == 0, ("lost %d frames", n));
665 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
668 * Adjust the start of the BA window to
669 * reflect the frames just dispatched.
671 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
672 vap->iv_stats.is_ampdu_rx_oor += i;
676 * Dispatch all frames in the A-MPDU re-order queue.
679 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
681 struct ieee80211vap *vap = ni->ni_vap;
685 for (i = 0; i < rap->rxa_wnd; i++) {
689 rap->rxa_m[i] = NULL;
690 rap->rxa_qbytes -= m->m_pkthdr.len;
692 vap->iv_stats.is_ampdu_rx_oor++;
694 ampdu_dispatch(ni, m);
695 if (rap->rxa_qframes == 0)
701 * Dispatch all frames in the A-MPDU re-order queue
702 * preceding the specified sequence number. This logic
703 * handles window moves due to a received MSDU or BAR.
706 ampdu_rx_flush_upto(struct ieee80211_node *ni,
707 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
709 struct ieee80211vap *vap = ni->ni_vap;
715 * Flush any complete MSDU's with a sequence number lower
716 * than winstart. Gaps may exist. Note that we may actually
717 * dispatch frames past winstart if a run continues; this is
718 * an optimization that avoids having to do a separate pass
719 * to dispatch frames after moving the BA window start.
721 seqno = rap->rxa_start;
722 for (i = 0; i < rap->rxa_wnd; i++) {
725 rap->rxa_m[i] = NULL;
726 rap->rxa_qbytes -= m->m_pkthdr.len;
728 vap->iv_stats.is_ampdu_rx_oor++;
730 ampdu_dispatch(ni, m);
732 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
735 seqno = IEEE80211_SEQ_INC(seqno);
738 * If frames remain, copy the mbuf pointers down so
739 * they correspond to the offsets in the new window.
741 if (rap->rxa_qframes != 0) {
742 int n = rap->rxa_qframes, j;
744 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */
745 KASSERT(rap->rxa_m[0] == NULL,
746 ("%s: BA window slot 0 occupied", __func__));
747 for (j = i+1; j < rap->rxa_wnd; j++) {
748 if (rap->rxa_m[j] != NULL) {
749 rap->rxa_m[j-i] = rap->rxa_m[j];
750 rap->rxa_m[j] = NULL;
755 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
756 "BA win <%d:%d> winstart %d",
757 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
758 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
760 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
763 * Move the start of the BA window; we use the
764 * sequence number of the last MSDU that was
765 * passed up the stack+1 or winstart if stopped on
766 * a gap in the reorder buffer.
768 rap->rxa_start = seqno;
772 * Process a received QoS data frame for an HT station. Handle
773 * A-MPDU reordering: if this frame is received out of order
774 * and falls within the BA window hold onto it. Otherwise if
775 * this frame completes a run, flush any pending frames. We
776 * return 1 if the frame is consumed. A 0 is returned if
777 * the frame should be processed normally by the caller.
780 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m)
782 #define IEEE80211_FC0_QOSDATA \
783 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
784 #define PROCESS 0 /* caller should process frame */
785 #define CONSUMED 1 /* frame consumed, caller does nothing */
786 struct ieee80211vap *vap = ni->ni_vap;
787 struct ieee80211_qosframe *wh;
788 struct ieee80211_rx_ampdu *rap;
793 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
794 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
795 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
797 /* NB: m_len known to be sufficient */
798 wh = mtod(m, struct ieee80211_qosframe *);
799 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
801 * Not QoS data, shouldn't get here but just
802 * return it to the caller for processing.
806 if (IEEE80211_IS_DSTODS(wh))
807 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
810 tid &= IEEE80211_QOS_TID;
811 rap = &ni->ni_rx_ampdu[tid];
812 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
814 * No ADDBA request yet, don't touch.
818 rxseq = le16toh(*(uint16_t *)wh->i_seq);
819 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
821 * Fragments are not allowed; toss.
823 IEEE80211_DISCARD_MAC(vap,
824 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
825 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
826 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
827 vap->iv_stats.is_ampdu_rx_drop++;
828 IEEE80211_NODE_STAT(ni, rx_drop);
832 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
835 if (rxseq == rap->rxa_start) {
837 * First frame in window.
839 if (rap->rxa_qframes != 0) {
841 * Dispatch as many packets as we can.
843 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
844 ampdu_dispatch(ni, m);
845 ampdu_rx_dispatch(rap, ni);
849 * In order; advance window and notify
850 * caller to dispatch directly.
852 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
857 * Frame is out of order; store if in the BA window.
859 /* calculate offset in BA window */
860 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
861 if (off < rap->rxa_wnd) {
863 * Common case (hopefully): in the BA window.
864 * Sec 9.10.7.6.2 a) (p.137)
868 * Check for frames sitting too long in the reorder queue.
869 * This should only ever happen if frames are not delivered
870 * without the sender otherwise notifying us (e.g. with a
871 * BAR to move the window). Typically this happens because
872 * of vendor bugs that cause the sequence number to jump.
873 * When this happens we get a gap in the reorder queue that
874 * leaves frame sitting on the queue until they get pushed
875 * out due to window moves. When the vendor does not send
876 * BAR this move only happens due to explicit packet sends
878 * NB: we only track the time of the oldest frame in the
879 * reorder q; this means that if we flush we might push
880 * frames that still "new"; if this happens then subsequent
881 * frames will result in BA window moves which cost something
882 * but is still better than a big throughput dip.
884 if (rap->rxa_qframes != 0) {
885 /* XXX honor batimeout? */
886 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
888 * Too long since we received the first
889 * frame; flush the reorder buffer.
891 if (rap->rxa_qframes != 0) {
892 vap->iv_stats.is_ampdu_rx_age +=
894 ampdu_rx_flush(ni, rap);
896 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
901 * First frame, start aging timer.
903 rap->rxa_age = ticks;
907 if (rap->rxa_m[off] == NULL) {
910 rap->rxa_qbytes += m->m_pkthdr.len;
911 vap->iv_stats.is_ampdu_rx_reorder++;
913 IEEE80211_DISCARD_MAC(vap,
914 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
915 ni->ni_macaddr, "a-mpdu duplicate",
916 "seqno %u tid %u BA win <%u:%u>",
917 rxseq, tid, rap->rxa_start,
918 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
919 vap->iv_stats.is_rx_dup++;
920 IEEE80211_NODE_STAT(ni, rx_dup);
925 if (off < IEEE80211_SEQ_BA_RANGE) {
927 * Outside the BA window, but within range;
928 * flush the reorder q and move the window.
929 * Sec 9.10.7.6.2 b) (p.138)
931 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
932 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
934 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
935 rap->rxa_qframes, rxseq, tid);
936 vap->iv_stats.is_ampdu_rx_move++;
939 * The spec says to flush frames up to but not including:
940 * WinStart_B = rxseq - rap->rxa_wnd + 1
941 * Then insert the frame or notify the caller to process
942 * it immediately. We can safely do this by just starting
943 * over again because we know the frame will now be within
946 /* NB: rxa_wnd known to be >0 */
947 ampdu_rx_flush_upto(ni, rap,
948 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
952 * Outside the BA window and out of range; toss.
953 * Sec 9.10.7.6.2 c) (p.138)
955 IEEE80211_DISCARD_MAC(vap,
956 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
957 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
959 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
960 rap->rxa_qframes, rxseq, tid,
961 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
962 vap->iv_stats.is_ampdu_rx_drop++;
963 IEEE80211_NODE_STAT(ni, rx_drop);
969 #undef IEEE80211_FC0_QOSDATA
973 * Process a BAR ctl frame. Dispatch all frames up to
974 * the sequence number of the frame. If this frame is
975 * out of range it's discarded.
978 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
980 struct ieee80211vap *vap = ni->ni_vap;
981 struct ieee80211_frame_bar *wh;
982 struct ieee80211_rx_ampdu *rap;
986 if (!ieee80211_recv_bar_ena) {
988 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
989 ni->ni_macaddr, "BAR", "%s", "processing disabled");
991 vap->iv_stats.is_ampdu_bar_bad++;
994 wh = mtod(m0, struct ieee80211_frame_bar *);
995 /* XXX check basic BAR */
996 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
997 rap = &ni->ni_rx_ampdu[tid];
998 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1000 * No ADDBA request yet, don't touch.
1002 IEEE80211_DISCARD_MAC(vap,
1003 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
1004 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
1005 vap->iv_stats.is_ampdu_bar_bad++;
1008 vap->iv_stats.is_ampdu_bar_rx++;
1009 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
1010 if (rxseq == rap->rxa_start)
1012 /* calculate offset in BA window */
1013 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1014 if (off < IEEE80211_SEQ_BA_RANGE) {
1016 * Flush the reorder q up to rxseq and move the window.
1017 * Sec 9.10.7.6.3 a) (p.138)
1019 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1020 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
1022 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1023 rap->rxa_qframes, rxseq, tid);
1024 vap->iv_stats.is_ampdu_bar_move++;
1026 ampdu_rx_flush_upto(ni, rap, rxseq);
1027 if (off >= rap->rxa_wnd) {
1029 * BAR specifies a window start to the right of BA
1030 * window; we must move it explicitly since
1031 * ampdu_rx_flush_upto will not.
1033 rap->rxa_start = rxseq;
1037 * Out of range; toss.
1038 * Sec 9.10.7.6.3 b) (p.138)
1040 IEEE80211_DISCARD_MAC(vap,
1041 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1042 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1044 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1045 rap->rxa_qframes, rxseq, tid,
1046 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1047 vap->iv_stats.is_ampdu_bar_oow++;
1048 IEEE80211_NODE_STAT(ni, rx_drop);
1053 * Setup HT-specific state in a node. Called only
1054 * when HT use is negotiated so we don't do extra
1055 * work for temporary and/or legacy sta's.
1058 ieee80211_ht_node_init(struct ieee80211_node *ni)
1060 struct ieee80211_tx_ampdu *tap;
1063 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1069 if (ni->ni_flags & IEEE80211_NODE_HT) {
1071 * Clean AMPDU state on re-associate. This handles the case
1072 * where a station leaves w/o notifying us and then returns
1073 * before node is reaped for inactivity.
1075 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1077 "%s: calling cleanup (%p)",
1079 ieee80211_ht_node_cleanup(ni);
1081 for (tid = 0; tid < WME_NUM_TID; tid++) {
1082 tap = &ni->ni_tx_ampdu[tid];
1085 ieee80211_txampdu_init_pps(tap);
1086 /* NB: further initialization deferred */
1088 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1092 * Cleanup HT-specific state in a node. Called only
1093 * when HT use has been marked.
1096 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1098 struct ieee80211com *ic = ni->ni_ic;
1101 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1106 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1108 /* XXX optimize this */
1109 for (i = 0; i < WME_NUM_TID; i++) {
1110 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1111 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1114 for (i = 0; i < WME_NUM_TID; i++)
1115 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1118 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1122 * Age out HT resources for a station.
1125 ieee80211_ht_node_age(struct ieee80211_node *ni)
1127 struct ieee80211vap *vap = ni->ni_vap;
1130 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1132 for (tid = 0; tid < WME_NUM_TID; tid++) {
1133 struct ieee80211_rx_ampdu *rap;
1135 rap = &ni->ni_rx_ampdu[tid];
1136 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1138 if (rap->rxa_qframes == 0)
1141 * Check for frames sitting too long in the reorder queue.
1142 * See above for more details on what's happening here.
1144 /* XXX honor batimeout? */
1145 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1147 * Too long since we received the first
1148 * frame; flush the reorder buffer.
1150 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1151 ampdu_rx_flush(ni, rap);
1156 static struct ieee80211_channel *
1157 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1159 return ieee80211_find_channel(ic, c->ic_freq,
1160 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1164 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1166 struct ieee80211_channel *
1167 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1168 struct ieee80211_channel *chan, int flags)
1170 struct ieee80211_channel *c;
1172 if (flags & IEEE80211_FHT_HT) {
1173 /* promote to HT if possible */
1174 if (flags & IEEE80211_FHT_USEHT40) {
1175 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1176 /* NB: arbitrarily pick ht40+ over ht40- */
1177 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1179 c = findhtchan(ic, chan,
1180 IEEE80211_CHAN_HT40D);
1182 c = findhtchan(ic, chan,
1183 IEEE80211_CHAN_HT20);
1187 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1188 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1192 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1193 /* demote to legacy, HT use is disabled */
1194 c = ieee80211_find_channel(ic, chan->ic_freq,
1195 chan->ic_flags &~ IEEE80211_CHAN_HT);
1203 * Setup HT-specific state for a legacy WDS peer.
1206 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1208 struct ieee80211vap *vap = ni->ni_vap;
1209 struct ieee80211_tx_ampdu *tap;
1212 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1214 /* XXX check scan cache in case peer has an ap and we have info */
1216 * If setup with a legacy channel; locate an HT channel.
1217 * Otherwise if the inherited channel (from a companion
1218 * AP) is suitable use it so we use the same location
1219 * for the extension channel).
1221 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1222 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1225 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1226 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1227 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1228 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1230 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1231 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1232 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1233 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1234 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1235 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1238 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1240 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1241 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1242 ni->ni_flags |= IEEE80211_NODE_RIFS;
1243 /* XXX does it make sense to enable SMPS? */
1245 ni->ni_htopmode = 0; /* XXX need protection state */
1246 ni->ni_htstbc = 0; /* XXX need info */
1248 for (tid = 0; tid < WME_NUM_TID; tid++) {
1249 tap = &ni->ni_tx_ampdu[tid];
1251 ieee80211_txampdu_init_pps(tap);
1253 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1254 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1258 * Notify hostap vaps of a change in the HTINFO ie.
1261 htinfo_notify(struct ieee80211com *ic)
1263 struct ieee80211vap *vap;
1266 IEEE80211_LOCK_ASSERT(ic);
1268 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1269 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1271 if (vap->iv_state != IEEE80211_S_RUN ||
1272 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1276 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1278 "HT bss occupancy change: %d sta, %d ht, "
1279 "%d ht40%s, HT protmode now 0x%x"
1281 , ic->ic_ht_sta_assoc
1282 , ic->ic_ht40_sta_assoc
1283 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1284 ", non-HT sta present" : ""
1285 , ic->ic_curhtprotmode);
1288 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1293 * Calculate HT protection mode from current
1294 * state and handle updates.
1297 htinfo_update(struct ieee80211com *ic)
1301 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1302 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1303 | IEEE80211_HTINFO_NONHT_PRESENT;
1304 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1305 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1306 | IEEE80211_HTINFO_NONHT_PRESENT;
1307 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1308 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1309 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1310 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1312 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1314 if (protmode != ic->ic_curhtprotmode) {
1315 ic->ic_curhtprotmode = protmode;
1321 * Handle an HT station joining a BSS.
1324 ieee80211_ht_node_join(struct ieee80211_node *ni)
1326 struct ieee80211com *ic = ni->ni_ic;
1328 IEEE80211_LOCK_ASSERT(ic);
1330 if (ni->ni_flags & IEEE80211_NODE_HT) {
1331 ic->ic_ht_sta_assoc++;
1332 if (ni->ni_chw == 40)
1333 ic->ic_ht40_sta_assoc++;
1339 * Handle an HT station leaving a BSS.
1342 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1344 struct ieee80211com *ic = ni->ni_ic;
1346 IEEE80211_LOCK_ASSERT(ic);
1348 if (ni->ni_flags & IEEE80211_NODE_HT) {
1349 ic->ic_ht_sta_assoc--;
1350 if (ni->ni_chw == 40)
1351 ic->ic_ht40_sta_assoc--;
1357 * Public version of htinfo_update; used for processing
1358 * beacon frames from overlapping bss.
1360 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1361 * (on receipt of a beacon that advertises MIXED) or
1362 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1363 * from an overlapping legacy bss). We treat MIXED with
1364 * a higher precedence than PROTOPT (i.e. we will not change
1365 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1366 * corresponds to how we handle things in htinfo_update.
1369 ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1371 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1374 /* track non-HT station presence */
1375 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1376 ("protmode 0x%x", protmode));
1377 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1378 ic->ic_lastnonht = ticks;
1380 if (protmode != ic->ic_curhtprotmode &&
1381 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1382 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1383 /* push beacon update */
1384 ic->ic_curhtprotmode = protmode;
1387 IEEE80211_UNLOCK(ic);
1392 * Time out presence of an overlapping bss with non-HT
1393 * stations. When operating in hostap mode we listen for
1394 * beacons from other stations and if we identify a non-HT
1395 * station is present we update the opmode field of the
1396 * HTINFO ie. To identify when all non-HT stations are
1397 * gone we time out this condition.
1400 ieee80211_ht_timeout(struct ieee80211com *ic)
1402 IEEE80211_LOCK_ASSERT(ic);
1404 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1405 ieee80211_time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1407 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1408 "%s", "time out non-HT STA present on channel");
1410 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1416 * Process an 802.11n HT capabilities ie.
1419 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1421 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1423 * Station used Vendor OUI ie to associate;
1424 * mark the node so when we respond we'll use
1425 * the Vendor OUI's and not the standard ie's.
1427 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1430 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1432 ni->ni_htcap = le16dec(ie +
1433 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1434 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1438 htinfo_parse(struct ieee80211_node *ni,
1439 const struct ieee80211_ie_htinfo *htinfo)
1443 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1444 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1445 w = le16dec(&htinfo->hi_byte2);
1446 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1447 w = le16dec(&htinfo->hi_byte45);
1448 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1452 * Parse an 802.11n HT info ie and save useful information
1453 * to the node state. Note this does not effect any state
1454 * changes such as for channel width change.
1457 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1459 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1461 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1465 * Handle 11n channel switch. Use the received HT ie's to
1466 * identify the right channel to use. If we cannot locate it
1467 * in the channel table then fallback to legacy operation.
1468 * Note that we use this information to identify the node's
1469 * channel only; the caller is responsible for insuring any
1470 * required channel change is done (e.g. in sta mode when
1471 * parsing the contents of a beacon frame).
1474 htinfo_update_chw(struct ieee80211_node *ni, int htflags)
1476 struct ieee80211com *ic = ni->ni_ic;
1477 struct ieee80211_channel *c;
1481 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags;
1482 if (chanflags != ni->ni_chan->ic_flags) {
1483 /* XXX not right for ht40- */
1484 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1485 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1487 * No HT40 channel entry in our table; fall back
1488 * to HT20 operation. This should not happen.
1490 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1492 IEEE80211_NOTE(ni->ni_vap,
1493 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1494 "no HT40 channel (freq %u), falling back to HT20",
1495 ni->ni_chan->ic_freq);
1499 if (c != NULL && c != ni->ni_chan) {
1500 IEEE80211_NOTE(ni->ni_vap,
1501 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1502 "switch station to HT%d channel %u/0x%x",
1503 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20,
1504 c->ic_freq, c->ic_flags);
1508 /* NB: caller responsible for forcing any channel change */
1510 /* update node's tx channel width */
1511 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1516 * Update 11n MIMO PS state according to received htcap.
1519 htcap_update_mimo_ps(struct ieee80211_node *ni)
1521 uint16_t oflags = ni->ni_flags;
1523 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1524 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1525 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1526 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1528 case IEEE80211_HTCAP_SMPS_ENA:
1529 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1530 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1532 case IEEE80211_HTCAP_SMPS_OFF:
1533 default: /* disable on rx of reserved value */
1534 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1535 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1538 return (oflags ^ ni->ni_flags);
1542 * Update short GI state according to received htcap
1543 * and local settings.
1545 static __inline void
1546 htcap_update_shortgi(struct ieee80211_node *ni)
1548 struct ieee80211vap *vap = ni->ni_vap;
1550 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1551 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1552 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1553 ni->ni_flags |= IEEE80211_NODE_SGI20;
1554 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1555 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1556 ni->ni_flags |= IEEE80211_NODE_SGI40;
1560 * Parse and update HT-related state extracted from
1561 * the HT cap and info ie's.
1564 ieee80211_ht_updateparams(struct ieee80211_node *ni,
1565 const uint8_t *htcapie, const uint8_t *htinfoie)
1567 struct ieee80211vap *vap = ni->ni_vap;
1568 const struct ieee80211_ie_htinfo *htinfo;
1572 ieee80211_parse_htcap(ni, htcapie);
1573 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1574 htcap_update_mimo_ps(ni);
1575 htcap_update_shortgi(ni);
1577 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1579 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1580 htinfo_parse(ni, htinfo);
1582 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1583 IEEE80211_CHAN_HT20 : 0;
1584 /* NB: honor operating mode constraint */
1585 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1586 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1587 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1588 htflags = IEEE80211_CHAN_HT40U;
1589 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1590 htflags = IEEE80211_CHAN_HT40D;
1592 if (htinfo_update_chw(ni, htflags))
1595 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1596 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1597 ni->ni_flags |= IEEE80211_NODE_RIFS;
1599 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1605 * Parse and update HT-related state extracted from the HT cap ie
1606 * for a station joining an HT BSS.
1609 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1611 struct ieee80211vap *vap = ni->ni_vap;
1614 ieee80211_parse_htcap(ni, htcapie);
1615 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1616 htcap_update_mimo_ps(ni);
1617 htcap_update_shortgi(ni);
1619 /* NB: honor operating mode constraint */
1620 /* XXX 40 MHz intolerant */
1621 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1622 IEEE80211_CHAN_HT20 : 0;
1623 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1624 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1625 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1626 htflags = IEEE80211_CHAN_HT40U;
1627 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1628 htflags = IEEE80211_CHAN_HT40D;
1630 (void) htinfo_update_chw(ni, htflags);
1634 * Install received HT rate set by parsing the HT cap ie.
1637 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1639 struct ieee80211com *ic = ni->ni_ic;
1640 struct ieee80211vap *vap = ni->ni_vap;
1641 const struct ieee80211_ie_htcap *htcap;
1642 struct ieee80211_htrateset *rs;
1643 int i, maxequalmcs, maxunequalmcs;
1645 maxequalmcs = ic->ic_txstream * 8 - 1;
1646 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1647 if (ic->ic_txstream >= 2)
1649 if (ic->ic_txstream >= 3)
1651 if (ic->ic_txstream >= 4)
1656 rs = &ni->ni_htrates;
1657 memset(rs, 0, sizeof(*rs));
1659 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1661 htcap = (const struct ieee80211_ie_htcap *) ie;
1662 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1663 if (isclr(htcap->hc_mcsset, i))
1665 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1667 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1668 "WARNING, HT rate set too large; only "
1669 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1670 vap->iv_stats.is_rx_rstoobig++;
1673 if (i <= 31 && i > maxequalmcs)
1676 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1678 if (i > 32 && i > maxunequalmcs)
1680 rs->rs_rates[rs->rs_nrates++] = i;
1683 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1687 * Mark rates in a node's HT rate set as basic according
1688 * to the information in the supplied HT info ie.
1691 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1693 const struct ieee80211_ie_htinfo *htinfo;
1694 struct ieee80211_htrateset *rs;
1697 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1699 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1700 rs = &ni->ni_htrates;
1701 if (rs->rs_nrates == 0) {
1702 IEEE80211_NOTE(ni->ni_vap,
1703 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1704 "%s", "WARNING, empty HT rate set");
1707 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1708 if (isclr(htinfo->hi_basicmcsset, i))
1710 for (j = 0; j < rs->rs_nrates; j++)
1711 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
1712 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
1717 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
1719 callout_init(&tap->txa_timer, 1);
1720 tap->txa_flags |= IEEE80211_AGGR_SETUP;
1721 tap->txa_lastsample = ticks;
1725 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
1727 struct ieee80211_node *ni = tap->txa_ni;
1728 struct ieee80211com *ic = ni->ni_ic;
1730 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
1735 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
1736 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid,
1737 TID_TO_WME_AC(tap->txa_tid)));
1740 * Stop BA stream if setup so driver has a chance
1741 * to reclaim any resources it might have allocated.
1743 ic->ic_addba_stop(ni, tap);
1745 * Stop any pending BAR transmit.
1747 bar_stop_timer(tap);
1750 * Reset packet estimate.
1752 ieee80211_txampdu_init_pps(tap);
1754 /* NB: clearing NAK means we may re-send ADDBA */
1755 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
1759 * ADDBA response timeout.
1761 * If software aggregation and per-TID queue management was done here,
1762 * that queue would be unpaused after the ADDBA timeout occurs.
1765 addba_timeout(void *arg)
1767 struct ieee80211_tx_ampdu *tap = arg;
1768 struct ieee80211_node *ni = tap->txa_ni;
1769 struct ieee80211com *ic = ni->ni_ic;
1772 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1773 tap->txa_attempts++;
1774 ic->ic_addba_response_timeout(ni, tap);
1778 addba_start_timeout(struct ieee80211_tx_ampdu *tap)
1780 /* XXX use CALLOUT_PENDING instead? */
1781 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
1782 addba_timeout, tap);
1783 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
1784 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
1788 addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
1790 /* XXX use CALLOUT_PENDING instead? */
1791 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
1792 callout_stop(&tap->txa_timer);
1793 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1798 null_addba_response_timeout(struct ieee80211_node *ni,
1799 struct ieee80211_tx_ampdu *tap)
1804 * Default method for requesting A-MPDU tx aggregation.
1805 * We setup the specified state block and start a timer
1806 * to wait for an ADDBA response frame.
1809 ieee80211_addba_request(struct ieee80211_node *ni,
1810 struct ieee80211_tx_ampdu *tap,
1811 int dialogtoken, int baparamset, int batimeout)
1816 tap->txa_token = dialogtoken;
1817 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
1818 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1819 tap->txa_wnd = (bufsiz == 0) ?
1820 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1821 addba_start_timeout(tap);
1826 * Called by drivers that wish to request an ADDBA session be
1827 * setup. This brings it up and starts the request timer.
1830 ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid)
1832 struct ieee80211_tx_ampdu *tap;
1834 if (tid < 0 || tid > 15)
1836 tap = &ni->ni_tx_ampdu[tid];
1839 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
1840 /* do deferred setup of state */
1841 ampdu_tx_setup(tap);
1843 /* XXX hack for not doing proper locking */
1844 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
1845 addba_start_timeout(tap);
1850 * Called by drivers that have marked a session as active.
1853 ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid,
1856 struct ieee80211_tx_ampdu *tap;
1858 if (tid < 0 || tid > 15)
1860 tap = &ni->ni_tx_ampdu[tid];
1863 addba_stop_timeout(tap);
1865 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1866 tap->txa_attempts = 0;
1868 /* mark tid so we don't try again */
1869 tap->txa_flags |= IEEE80211_AGGR_NAK;
1875 * Default method for processing an A-MPDU tx aggregation
1876 * response. We shutdown any pending timer and update the
1877 * state block according to the reply.
1880 ieee80211_addba_response(struct ieee80211_node *ni,
1881 struct ieee80211_tx_ampdu *tap,
1882 int status, int baparamset, int batimeout)
1887 addba_stop_timeout(tap);
1888 if (status == IEEE80211_STATUS_SUCCESS) {
1889 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1890 /* XXX override our request? */
1891 tap->txa_wnd = (bufsiz == 0) ?
1892 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1894 tid = MS(baparamset, IEEE80211_BAPS_TID);
1895 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1896 tap->txa_attempts = 0;
1898 /* mark tid so we don't try again */
1899 tap->txa_flags |= IEEE80211_AGGR_NAK;
1905 * Default method for stopping A-MPDU tx aggregation.
1906 * Any timer is cleared and we drain any pending frames.
1909 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
1912 addba_stop_timeout(tap);
1913 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
1914 /* XXX clear aggregation queue */
1915 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
1917 tap->txa_attempts = 0;
1921 * Process a received action frame using the default aggregation
1922 * policy. We intercept ADDBA-related frames and use them to
1923 * update our aggregation state. All other frames are passed up
1924 * for processing by ieee80211_recv_action.
1927 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
1928 const struct ieee80211_frame *wh,
1929 const uint8_t *frm, const uint8_t *efrm)
1931 struct ieee80211com *ic = ni->ni_ic;
1932 struct ieee80211vap *vap = ni->ni_vap;
1933 struct ieee80211_rx_ampdu *rap;
1934 uint8_t dialogtoken;
1935 uint16_t baparamset, batimeout, baseqctl;
1939 dialogtoken = frm[2];
1940 baparamset = le16dec(frm+3);
1941 batimeout = le16dec(frm+5);
1942 baseqctl = le16dec(frm+7);
1944 tid = MS(baparamset, IEEE80211_BAPS_TID);
1946 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1947 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
1948 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
1949 dialogtoken, baparamset,
1950 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
1952 MS(baseqctl, IEEE80211_BASEQ_START),
1953 MS(baseqctl, IEEE80211_BASEQ_FRAG));
1955 rap = &ni->ni_rx_ampdu[tid];
1957 /* Send ADDBA response */
1958 args[0] = dialogtoken;
1960 * NB: We ack only if the sta associated with HT and
1961 * the ap is configured to do AMPDU rx (the latter
1962 * violates the 11n spec and is mostly for testing).
1964 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
1965 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
1966 /* XXX handle ampdu_rx_start failure */
1967 ic->ic_ampdu_rx_start(ni, rap,
1968 baparamset, batimeout, baseqctl);
1970 args[1] = IEEE80211_STATUS_SUCCESS;
1972 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1973 ni, "reject ADDBA request: %s",
1974 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
1975 "administratively disabled" :
1976 "not negotiated for station");
1977 vap->iv_stats.is_addba_reject++;
1978 args[1] = IEEE80211_STATUS_UNSPECIFIED;
1980 /* XXX honor rap flags? */
1981 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
1982 | SM(tid, IEEE80211_BAPS_TID)
1983 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
1987 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
1988 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
1993 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
1994 const struct ieee80211_frame *wh,
1995 const uint8_t *frm, const uint8_t *efrm)
1997 struct ieee80211com *ic = ni->ni_ic;
1998 struct ieee80211vap *vap = ni->ni_vap;
1999 struct ieee80211_tx_ampdu *tap;
2000 uint8_t dialogtoken, policy;
2001 uint16_t baparamset, batimeout, code;
2004 dialogtoken = frm[2];
2005 code = le16dec(frm+3);
2006 baparamset = le16dec(frm+5);
2007 tid = MS(baparamset, IEEE80211_BAPS_TID);
2008 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2009 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
2010 batimeout = le16dec(frm+7);
2012 tap = &ni->ni_tx_ampdu[tid];
2013 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
2014 IEEE80211_DISCARD_MAC(vap,
2015 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2016 ni->ni_macaddr, "ADDBA response",
2017 "no pending ADDBA, tid %d dialogtoken %u "
2018 "code %d", tid, dialogtoken, code);
2019 vap->iv_stats.is_addba_norequest++;
2022 if (dialogtoken != tap->txa_token) {
2023 IEEE80211_DISCARD_MAC(vap,
2024 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2025 ni->ni_macaddr, "ADDBA response",
2026 "dialogtoken mismatch: waiting for %d, "
2027 "received %d, tid %d code %d",
2028 tap->txa_token, dialogtoken, tid, code);
2029 vap->iv_stats.is_addba_badtoken++;
2032 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
2033 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
2034 IEEE80211_DISCARD_MAC(vap,
2035 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2036 ni->ni_macaddr, "ADDBA response",
2037 "policy mismatch: expecting %s, "
2038 "received %s, tid %d code %d",
2039 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
2041 vap->iv_stats.is_addba_badpolicy++;
2045 /* XXX we take MIN in ieee80211_addba_response */
2046 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
2047 IEEE80211_DISCARD_MAC(vap,
2048 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2049 ni->ni_macaddr, "ADDBA response",
2050 "BA window too large: max %d, "
2051 "received %d, tid %d code %d",
2052 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
2053 vap->iv_stats.is_addba_badbawinsize++;
2057 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2058 "recv ADDBA response: dialogtoken %u code %d "
2059 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
2060 dialogtoken, code, baparamset, tid, bufsiz,
2062 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
2067 ht_recv_action_ba_delba(struct ieee80211_node *ni,
2068 const struct ieee80211_frame *wh,
2069 const uint8_t *frm, const uint8_t *efrm)
2071 struct ieee80211com *ic = ni->ni_ic;
2072 struct ieee80211_rx_ampdu *rap;
2073 struct ieee80211_tx_ampdu *tap;
2074 uint16_t baparamset, code;
2077 baparamset = le16dec(frm+2);
2078 code = le16dec(frm+4);
2080 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
2082 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2083 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
2084 "code %d", baparamset, tid,
2085 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
2087 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
2088 tap = &ni->ni_tx_ampdu[tid];
2089 ic->ic_addba_stop(ni, tap);
2091 rap = &ni->ni_rx_ampdu[tid];
2092 ic->ic_ampdu_rx_stop(ni, rap);
2098 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
2099 const struct ieee80211_frame *wh,
2100 const uint8_t *frm, const uint8_t *efrm)
2104 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
2106 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2107 "%s: HT txchwidth, width %d%s",
2108 __func__, chw, ni->ni_chw != chw ? "*" : "");
2109 if (chw != ni->ni_chw) {
2111 /* XXX notify on change */
2117 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2118 const struct ieee80211_frame *wh,
2119 const uint8_t *frm, const uint8_t *efrm)
2121 const struct ieee80211_action_ht_mimopowersave *mps =
2122 (const struct ieee80211_action_ht_mimopowersave *) frm;
2124 /* XXX check iv_htcaps */
2125 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2126 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2128 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2129 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2130 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2132 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2133 /* XXX notify on change */
2134 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2135 "%s: HT MIMO PS (%s%s)", __func__,
2136 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2137 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2143 * Transmit processing.
2147 * Check if A-MPDU should be requested/enabled for a stream.
2148 * We require a traffic rate above a per-AC threshold and we
2149 * also handle backoff from previous failed attempts.
2151 * Drivers may override this method to bring in information
2152 * such as link state conditions in making the decision.
2155 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2156 struct ieee80211_tx_ampdu *tap)
2158 struct ieee80211vap *vap = ni->ni_vap;
2160 if (tap->txa_avgpps <
2161 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)])
2163 /* XXX check rssi? */
2164 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2165 ieee80211_time_after(ticks, tap->txa_nextrequest)) {
2167 * Don't retry too often; txa_nextrequest is set
2168 * to the minimum interval we'll retry after
2169 * ieee80211_addba_maxtries failed attempts are made.
2173 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2174 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d",
2175 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)],
2176 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts);
2181 * Request A-MPDU tx aggregation. Setup local state and
2182 * issue an ADDBA request. BA use will only happen after
2183 * the other end replies with ADDBA response.
2186 ieee80211_ampdu_request(struct ieee80211_node *ni,
2187 struct ieee80211_tx_ampdu *tap)
2189 struct ieee80211com *ic = ni->ni_ic;
2191 int tid, dialogtoken;
2192 static int tokens = 0; /* XXX */
2195 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2196 /* do deferred setup of state */
2197 ampdu_tx_setup(tap);
2199 /* XXX hack for not doing proper locking */
2200 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2202 dialogtoken = (tokens+1) % 63; /* XXX */
2204 tap->txa_start = ni->ni_txseqs[tid];
2206 args[0] = dialogtoken;
2207 args[1] = 0; /* NB: status code not used */
2208 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2209 | SM(tid, IEEE80211_BAPS_TID)
2210 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2212 args[3] = 0; /* batimeout */
2213 /* NB: do first so there's no race against reply */
2214 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2215 /* unable to setup state, don't make request */
2216 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2217 ni, "%s: could not setup BA stream for TID %d AC %d",
2218 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid));
2219 /* defer next try so we don't slam the driver with requests */
2220 tap->txa_attempts = ieee80211_addba_maxtries;
2221 /* NB: check in case driver wants to override */
2222 if (tap->txa_nextrequest <= ticks)
2223 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2226 tokens = dialogtoken; /* allocate token */
2227 /* NB: after calling ic_addba_request so driver can set txa_start */
2228 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2229 | SM(0, IEEE80211_BASEQ_FRAG)
2231 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2232 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2236 * Terminate an AMPDU tx stream. State is reclaimed
2237 * and the peer notified with a DelBA Action frame.
2240 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2243 struct ieee80211com *ic = ni->ni_ic;
2244 struct ieee80211vap *vap = ni->ni_vap;
2248 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2249 if (IEEE80211_AMPDU_RUNNING(tap)) {
2250 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2251 ni, "%s: stop BA stream for TID %d (reason: %d (%s))",
2252 __func__, tap->txa_tid, reason,
2253 ieee80211_reason_to_string(reason));
2254 vap->iv_stats.is_ampdu_stop++;
2256 ic->ic_addba_stop(ni, tap);
2257 args[0] = tap->txa_tid;
2258 args[1] = IEEE80211_DELBAPS_INIT;
2259 args[2] = reason; /* XXX reason code */
2260 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2261 IEEE80211_ACTION_BA_DELBA, args);
2263 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2264 ni, "%s: BA stream for TID %d not running "
2265 "(reason: %d (%s))", __func__, tap->txa_tid, reason,
2266 ieee80211_reason_to_string(reason));
2267 vap->iv_stats.is_ampdu_stop_failed++;
2272 static void bar_start_timer(struct ieee80211_tx_ampdu *tap);
2275 bar_timeout(void *arg)
2277 struct ieee80211_tx_ampdu *tap = arg;
2278 struct ieee80211_node *ni = tap->txa_ni;
2280 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2281 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2283 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2284 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2285 tap->txa_tid, tap->txa_flags, tap->txa_attempts);
2287 /* guard against race with bar_tx_complete */
2288 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2291 if (tap->txa_attempts >= ieee80211_bar_maxtries) {
2292 struct ieee80211com *ic = ni->ni_ic;
2294 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++;
2296 * If (at least) the last BAR TX timeout was due to
2297 * an ieee80211_send_bar() failures, then we need
2298 * to make sure we notify the driver that a BAR
2299 * TX did occur and fail. This gives the driver
2300 * a chance to undo any queue pause that may
2303 ic->ic_bar_response(ni, tap, 1);
2304 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2306 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++;
2307 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) {
2308 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2309 ni, "%s: failed to TX, starting timer\n",
2312 * If ieee80211_send_bar() fails here, the
2313 * timer may have stopped and/or the pending
2314 * flag may be clear. Because of this,
2315 * fake the BARPEND and reset the timer.
2316 * A retransmission attempt will then occur
2317 * during the next timeout.
2320 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2321 bar_start_timer(tap);
2327 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2329 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2333 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2337 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2339 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2343 callout_stop(&tap->txa_timer);
2347 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2349 struct ieee80211_tx_ampdu *tap = arg;
2351 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2352 ni, "%s: tid %u flags 0x%x pending %d status %d",
2353 __func__, tap->txa_tid, tap->txa_flags,
2354 callout_pending(&tap->txa_timer), status);
2356 ni->ni_vap->iv_stats.is_ampdu_bar_tx++;
2358 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2359 callout_pending(&tap->txa_timer)) {
2360 struct ieee80211com *ic = ni->ni_ic;
2362 if (status == 0) /* ACK'd */
2363 bar_stop_timer(tap);
2364 ic->ic_bar_response(ni, tap, status);
2365 /* NB: just let timer expire so we pace requests */
2370 ieee80211_bar_response(struct ieee80211_node *ni,
2371 struct ieee80211_tx_ampdu *tap, int status)
2374 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2378 if (status == 0) { /* got ACK */
2379 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2380 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2382 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2383 tap->txa_qframes, tap->txa_seqpending,
2386 /* NB: timer already stopped in bar_tx_complete */
2387 tap->txa_start = tap->txa_seqpending;
2388 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2393 * Transmit a BAR frame to the specified node. The
2394 * BAR contents are drawn from the supplied aggregation
2395 * state associated with the node.
2397 * NB: we only handle immediate ACK w/ compressed bitmap.
2400 ieee80211_send_bar(struct ieee80211_node *ni,
2401 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2403 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2404 struct ieee80211vap *vap = ni->ni_vap;
2405 struct ieee80211com *ic = ni->ni_ic;
2406 struct ieee80211_frame_bar *bar;
2408 uint16_t barctl, barseqctl;
2413 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2418 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2419 /* no ADDBA response, should not happen */
2424 bar_stop_timer(tap);
2426 ieee80211_ref_node(ni);
2428 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2430 senderr(ENOMEM, is_tx_nobuf);
2432 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2434 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2438 bar = mtod(m, struct ieee80211_frame_bar *);
2439 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2440 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2442 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2443 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2446 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2447 0 : IEEE80211_BAR_NOACK)
2448 | IEEE80211_BAR_COMP
2449 | SM(tid, IEEE80211_BAR_TID)
2451 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2452 /* NB: known to have proper alignment */
2453 bar->i_ctl = htole16(barctl);
2454 bar->i_seq = htole16(barseqctl);
2455 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2457 M_WME_SETAC(m, WME_AC_VO);
2459 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2462 /* init/bump attempts counter */
2463 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2464 tap->txa_attempts = 1;
2466 tap->txa_attempts++;
2467 tap->txa_seqpending = seq;
2468 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2470 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2471 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2472 tid, barctl, seq, tap->txa_attempts);
2475 * ic_raw_xmit will free the node reference
2476 * regardless of queue/TX success or failure.
2478 IEEE80211_TX_LOCK(ic);
2479 ret = ieee80211_raw_output(vap, ni, m, NULL);
2480 IEEE80211_TX_UNLOCK(ic);
2482 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2483 ni, "send BAR: failed: (ret = %d)\n",
2485 /* xmit failed, clear state flag */
2486 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2487 vap->iv_stats.is_ampdu_bar_tx_fail++;
2490 /* XXX hack against tx complete happening before timer is started */
2491 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2492 bar_start_timer(tap);
2495 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2499 vap->iv_stats.is_ampdu_bar_tx_fail++;
2500 ieee80211_free_node(ni);
2506 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2508 struct ieee80211_bpf_params params;
2510 memset(¶ms, 0, sizeof(params));
2511 params.ibp_pri = WME_AC_VO;
2512 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2513 /* NB: we know all frames are unicast */
2514 params.ibp_try0 = ni->ni_txparms->maxretry;
2515 params.ibp_power = ni->ni_txpower;
2516 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2520 #define ADDSHORT(frm, v) do { \
2521 frm[0] = (v) & 0xff; \
2522 frm[1] = (v) >> 8; \
2527 * Send an action management frame. The arguments are stuff
2528 * into a frame without inspection; the caller is assumed to
2529 * prepare them carefully (e.g. based on the aggregation state).
2532 ht_send_action_ba_addba(struct ieee80211_node *ni,
2533 int category, int action, void *arg0)
2535 struct ieee80211vap *vap = ni->ni_vap;
2536 struct ieee80211com *ic = ni->ni_ic;
2537 uint16_t *args = arg0;
2541 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2542 "send ADDBA %s: dialogtoken %d status %d "
2543 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2544 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2545 "request" : "response",
2546 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2549 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2550 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2551 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2552 ieee80211_ref_node(ni);
2554 m = ieee80211_getmgtframe(&frm,
2555 ic->ic_headroom + sizeof(struct ieee80211_frame),
2556 sizeof(uint16_t) /* action+category */
2557 /* XXX may action payload */
2558 + sizeof(struct ieee80211_action_ba_addbaresponse)
2563 *frm++ = args[0]; /* dialog token */
2564 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2565 ADDSHORT(frm, args[1]); /* status code */
2566 ADDSHORT(frm, args[2]); /* baparamset */
2567 ADDSHORT(frm, args[3]); /* batimeout */
2568 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2569 ADDSHORT(frm, args[4]); /* baseqctl */
2570 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2571 return ht_action_output(ni, m);
2573 vap->iv_stats.is_tx_nobuf++;
2574 ieee80211_free_node(ni);
2580 ht_send_action_ba_delba(struct ieee80211_node *ni,
2581 int category, int action, void *arg0)
2583 struct ieee80211vap *vap = ni->ni_vap;
2584 struct ieee80211com *ic = ni->ni_ic;
2585 uint16_t *args = arg0;
2587 uint16_t baparamset;
2590 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2593 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2594 "send DELBA action: tid %d, initiator %d reason %d (%s)",
2595 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2597 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2598 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2599 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2600 ieee80211_ref_node(ni);
2602 m = ieee80211_getmgtframe(&frm,
2603 ic->ic_headroom + sizeof(struct ieee80211_frame),
2604 sizeof(uint16_t) /* action+category */
2605 /* XXX may action payload */
2606 + sizeof(struct ieee80211_action_ba_addbaresponse)
2611 ADDSHORT(frm, baparamset);
2612 ADDSHORT(frm, args[2]); /* reason code */
2613 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2614 return ht_action_output(ni, m);
2616 vap->iv_stats.is_tx_nobuf++;
2617 ieee80211_free_node(ni);
2623 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2624 int category, int action, void *arg0)
2626 struct ieee80211vap *vap = ni->ni_vap;
2627 struct ieee80211com *ic = ni->ni_ic;
2631 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2632 "send HT txchwidth: width %d",
2633 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2635 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2636 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2637 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2638 ieee80211_ref_node(ni);
2640 m = ieee80211_getmgtframe(&frm,
2641 ic->ic_headroom + sizeof(struct ieee80211_frame),
2642 sizeof(uint16_t) /* action+category */
2643 /* XXX may action payload */
2644 + sizeof(struct ieee80211_action_ba_addbaresponse)
2649 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2650 IEEE80211_A_HT_TXCHWIDTH_2040 :
2651 IEEE80211_A_HT_TXCHWIDTH_20;
2652 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2653 return ht_action_output(ni, m);
2655 vap->iv_stats.is_tx_nobuf++;
2656 ieee80211_free_node(ni);
2663 * Construct the MCS bit mask for inclusion in an HT capabilities
2664 * information element.
2667 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2672 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2673 ("ic_rxstream %d out of range", ic->ic_rxstream));
2674 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2675 ("ic_txstream %d out of range", ic->ic_txstream));
2677 for (i = 0; i < ic->ic_rxstream * 8; i++)
2679 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2680 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2682 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2683 if (ic->ic_rxstream >= 2) {
2684 for (i = 33; i <= 38; i++)
2687 if (ic->ic_rxstream >= 3) {
2688 for (i = 39; i <= 52; i++)
2691 if (ic->ic_txstream >= 4) {
2692 for (i = 53; i <= 76; i++)
2697 if (ic->ic_rxstream != ic->ic_txstream) {
2698 txparams = 0x1; /* TX MCS set defined */
2699 txparams |= 0x2; /* TX RX MCS not equal */
2700 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2701 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2702 txparams |= 0x16; /* TX unequal modulation sup */
2709 * Add body of an HTCAP information element.
2712 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
2714 #define ADDSHORT(frm, v) do { \
2715 frm[0] = (v) & 0xff; \
2716 frm[1] = (v) >> 8; \
2719 struct ieee80211com *ic = ni->ni_ic;
2720 struct ieee80211vap *vap = ni->ni_vap;
2721 uint16_t caps, extcaps;
2724 /* HT capabilities */
2725 caps = vap->iv_htcaps & 0xffff;
2727 * Note channel width depends on whether we are operating as
2728 * a sta or not. When operating as a sta we are generating
2729 * a request based on our desired configuration. Otherwise
2730 * we are operational and the channel attributes identify
2731 * how we've been setup (which might be different if a fixed
2732 * channel is specified).
2734 if (vap->iv_opmode == IEEE80211_M_STA) {
2735 /* override 20/40 use based on config */
2736 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
2737 caps |= IEEE80211_HTCAP_CHWIDTH40;
2739 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2741 /* Start by using the advertised settings */
2742 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
2743 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
2745 /* Cap at VAP rxmax */
2746 if (rxmax > vap->iv_ampdu_rxmax)
2747 rxmax = vap->iv_ampdu_rxmax;
2750 * If the VAP ampdu density value greater, use that.
2752 * (Larger density value == larger minimum gap between A-MPDU
2755 if (vap->iv_ampdu_density > density)
2756 density = vap->iv_ampdu_density;
2759 * NB: Hardware might support HT40 on some but not all
2760 * channels. We can't determine this earlier because only
2761 * after association the channel is upgraded to HT based
2762 * on the negotiated capabilities.
2764 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
2765 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
2766 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
2767 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2769 /* override 20/40 use based on current channel */
2770 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2771 caps |= IEEE80211_HTCAP_CHWIDTH40;
2773 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2775 /* XXX TODO should it start by using advertised settings? */
2776 rxmax = vap->iv_ampdu_rxmax;
2777 density = vap->iv_ampdu_density;
2780 /* adjust short GI based on channel and config */
2781 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
2782 caps &= ~IEEE80211_HTCAP_SHORTGI20;
2783 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
2784 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
2785 caps &= ~IEEE80211_HTCAP_SHORTGI40;
2787 /* adjust STBC based on receive capabilities */
2788 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
2789 caps &= ~IEEE80211_HTCAP_RXSTBC;
2791 /* XXX TODO: adjust LDPC based on receive capabilities */
2793 ADDSHORT(frm, caps);
2796 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
2797 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
2801 /* pre-zero remainder of ie */
2802 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
2803 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
2805 /* supported MCS set */
2807 * XXX: For sta mode the rate set should be restricted based
2808 * on the AP's capabilities, but ni_htrates isn't setup when
2809 * we're called to form an AssocReq frame so for now we're
2810 * restricted to the device capabilities.
2812 ieee80211_set_mcsset(ni->ni_ic, frm);
2814 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
2815 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
2817 /* HT extended capabilities */
2818 extcaps = vap->iv_htextcaps & 0xffff;
2820 ADDSHORT(frm, extcaps);
2822 frm += sizeof(struct ieee80211_ie_htcap) -
2823 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
2830 * Add 802.11n HT capabilities information element
2833 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
2835 frm[0] = IEEE80211_ELEMID_HTCAP;
2836 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
2837 return ieee80211_add_htcap_body(frm + 2, ni);
2841 * Add Broadcom OUI wrapped standard HTCAP ie; this is
2842 * used for compatibility w/ pre-draft implementations.
2845 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
2847 frm[0] = IEEE80211_ELEMID_VENDOR;
2848 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
2849 frm[2] = (BCM_OUI >> 0) & 0xff;
2850 frm[3] = (BCM_OUI >> 8) & 0xff;
2851 frm[4] = (BCM_OUI >> 16) & 0xff;
2852 frm[5] = BCM_OUI_HTCAP;
2853 return ieee80211_add_htcap_body(frm + 6, ni);
2857 * Construct the MCS bit mask of basic rates
2858 * for inclusion in an HT information element.
2861 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
2865 for (i = 0; i < rs->rs_nrates; i++) {
2866 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
2867 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
2868 r < IEEE80211_HTRATE_MAXSIZE) {
2869 /* NB: this assumes a particular implementation */
2876 * Update the HTINFO ie for a beacon frame.
2879 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
2880 struct ieee80211_beacon_offsets *bo)
2882 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
2883 struct ieee80211_node *ni;
2884 const struct ieee80211_channel *bsschan;
2885 struct ieee80211com *ic = vap->iv_ic;
2886 struct ieee80211_ie_htinfo *ht =
2887 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
2889 ni = ieee80211_ref_node(vap->iv_bss);
2890 bsschan = ni->ni_chan;
2892 /* XXX only update on channel change */
2893 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
2894 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2895 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
2897 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
2898 if (IEEE80211_IS_CHAN_HT40U(bsschan))
2899 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2900 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
2901 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2903 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
2904 if (IEEE80211_IS_CHAN_HT40(bsschan))
2905 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
2907 /* protection mode */
2908 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
2910 ieee80211_free_node(ni);
2912 /* XXX propagate to vendor ie's */
2917 * Add body of an HTINFO information element.
2919 * NB: We don't use struct ieee80211_ie_htinfo because we can
2920 * be called to fillin both a standard ie and a compat ie that
2921 * has a vendor OUI at the front.
2924 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
2926 struct ieee80211vap *vap = ni->ni_vap;
2927 struct ieee80211com *ic = ni->ni_ic;
2929 /* pre-zero remainder of ie */
2930 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
2932 /* primary/control channel center */
2933 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2935 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2936 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
2938 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
2939 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
2940 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2941 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
2942 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2944 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
2945 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2946 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
2948 frm[1] = ic->ic_curhtprotmode;
2953 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
2954 frm += sizeof(struct ieee80211_ie_htinfo) -
2955 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
2960 * Add 802.11n HT information information element.
2963 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
2965 frm[0] = IEEE80211_ELEMID_HTINFO;
2966 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
2967 return ieee80211_add_htinfo_body(frm + 2, ni);
2971 * Add Broadcom OUI wrapped standard HTINFO ie; this is
2972 * used for compatibility w/ pre-draft implementations.
2975 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
2977 frm[0] = IEEE80211_ELEMID_VENDOR;
2978 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
2979 frm[2] = (BCM_OUI >> 0) & 0xff;
2980 frm[3] = (BCM_OUI >> 8) & 0xff;
2981 frm[4] = (BCM_OUI >> 16) & 0xff;
2982 frm[5] = BCM_OUI_HTINFO;
2983 return ieee80211_add_htinfo_body(frm + 6, ni);