2 * Copyright (c) 2017 Adrian Chadd <adrian@FreeBSD.org>
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 802.11ac-2013 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>
54 #include <net80211/ieee80211_vht.h>
56 /* define here, used throughout file */
57 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
58 #define SM(_v, _f) (((_v) << _f##_S) & _f)
60 #define ADDSHORT(frm, v) do { \
61 frm[0] = (v) & 0xff; \
65 #define ADDWORD(frm, v) do { \
66 frm[0] = (v) & 0xff; \
67 frm[1] = ((v) >> 8) & 0xff; \
68 frm[2] = ((v) >> 16) & 0xff; \
69 frm[3] = ((v) >> 24) & 0xff; \
76 * + handle WLAN_ACTION_VHT_OPMODE_NOTIF and other VHT action frames
77 * + ensure vhtinfo/vhtcap parameters correctly use the negotiated
78 * capabilities and ratesets
79 * + group ID management operation
83 * XXX TODO: handle WLAN_ACTION_VHT_OPMODE_NOTIF
85 * Look at mac80211/vht.c:ieee80211_vht_handle_opmode() for further details.
89 vht_recv_action_placeholder(struct ieee80211_node *ni,
90 const struct ieee80211_frame *wh,
91 const uint8_t *frm, const uint8_t *efrm)
94 #ifdef IEEE80211_DEBUG
95 ieee80211_note(ni->ni_vap, "%s: called; fc=0x%.2x/0x%.2x",
104 vht_send_action_placeholder(struct ieee80211_node *ni,
105 int category, int action, void *arg0)
108 #ifdef IEEE80211_DEBUG
109 ieee80211_note(ni->ni_vap, "%s: called; category=%d, action=%d",
118 ieee80211_vht_init(void)
121 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
122 WLAN_ACTION_VHT_COMPRESSED_BF, vht_recv_action_placeholder);
123 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
124 WLAN_ACTION_VHT_GROUPID_MGMT, vht_recv_action_placeholder);
125 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
126 WLAN_ACTION_VHT_OPMODE_NOTIF, vht_recv_action_placeholder);
128 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
129 WLAN_ACTION_VHT_COMPRESSED_BF, vht_send_action_placeholder);
130 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
131 WLAN_ACTION_VHT_GROUPID_MGMT, vht_send_action_placeholder);
132 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
133 WLAN_ACTION_VHT_OPMODE_NOTIF, vht_send_action_placeholder);
136 SYSINIT(wlan_vht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_vht_init, NULL);
139 ieee80211_vht_attach(struct ieee80211com *ic)
144 ieee80211_vht_detach(struct ieee80211com *ic)
149 ieee80211_vht_vattach(struct ieee80211vap *vap)
151 struct ieee80211com *ic = vap->iv_ic;
153 if (! IEEE80211_CONF_VHT(ic))
156 vap->iv_vhtcaps = ic->ic_vhtcaps;
157 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
159 /* XXX assume VHT80 support; should really check vhtcaps */
162 | IEEE80211_FVHT_USEVHT40
163 | IEEE80211_FVHT_USEVHT80;
164 /* XXX TODO: enable VHT80+80, VHT160 capabilities */
166 memcpy(&vap->iv_vht_mcsinfo, &ic->ic_vht_mcsinfo,
167 sizeof(struct ieee80211_vht_mcs_info));
171 ieee80211_vht_vdetach(struct ieee80211vap *vap)
177 vht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
183 vht_mcs_to_num(int m)
187 case IEEE80211_VHT_MCS_SUPPORT_0_7:
189 case IEEE80211_VHT_MCS_SUPPORT_0_8:
191 case IEEE80211_VHT_MCS_SUPPORT_0_9:
199 ieee80211_vht_announce(struct ieee80211com *ic)
203 if (! IEEE80211_CONF_VHT(ic))
207 ic_printf(ic, "[VHT] Channel Widths: 20MHz, 40MHz, 80MHz");
208 if (MS(ic->ic_vhtcaps, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2)
210 if (MS(ic->ic_vhtcaps, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1)
215 ic_printf(ic, "[VHT] Features: %b\n", ic->ic_vhtcaps,
216 IEEE80211_VHTCAP_BITS);
218 /* For now, just 5GHz VHT. Worry about 2GHz VHT later */
219 for (i = 0; i < 7; i++) {
220 /* Each stream is 2 bits */
221 tx = (ic->ic_vht_mcsinfo.tx_mcs_map >> (2*i)) & 0x3;
222 rx = (ic->ic_vht_mcsinfo.rx_mcs_map >> (2*i)) & 0x3;
223 if (tx == 3 && rx == 3)
225 ic_printf(ic, "[VHT] NSS %d: TX MCS 0..%d, RX MCS 0..%d\n",
233 ieee80211_vht_node_init(struct ieee80211_node *ni)
236 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
237 "%s: called", __func__);
238 ni->ni_flags |= IEEE80211_NODE_VHT;
242 ieee80211_vht_node_cleanup(struct ieee80211_node *ni)
245 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
246 "%s: called", __func__);
247 ni->ni_flags &= ~IEEE80211_NODE_VHT;
249 bzero(&ni->ni_vht_mcsinfo, sizeof(struct ieee80211_vht_mcs_info));
253 * Parse an 802.11ac VHT operation IE.
256 ieee80211_parse_vhtopmode(struct ieee80211_node *ni, const uint8_t *ie)
259 ni->ni_vht_chanwidth = ie[2];
260 ni->ni_vht_chan1 = ie[3];
261 ni->ni_vht_chan2 = ie[4];
262 ni->ni_vht_basicmcs = le16dec(ie + 5);
265 printf("%s: chan1=%d, chan2=%d, chanwidth=%d, basicmcs=0x%04x\n",
269 ni->ni_vht_chanwidth,
270 ni->ni_vht_basicmcs);
275 * Parse an 802.11ac VHT capability IE.
278 ieee80211_parse_vhtcap(struct ieee80211_node *ni, const uint8_t *ie)
282 ni->ni_vhtcap = le32dec(ie + 2);
285 ni->ni_vht_mcsinfo.rx_mcs_map = le16dec(ie + 6);
286 ni->ni_vht_mcsinfo.rx_highest = le16dec(ie + 8);
287 ni->ni_vht_mcsinfo.tx_mcs_map = le16dec(ie + 10);
288 ni->ni_vht_mcsinfo.tx_highest = le16dec(ie + 12);
292 ieee80211_vht_updateparams(struct ieee80211_node *ni,
293 const uint8_t *vhtcap_ie,
294 const uint8_t *vhtop_ie)
297 //printf("%s: called\n", __func__);
299 ieee80211_parse_vhtcap(ni, vhtcap_ie);
300 ieee80211_parse_vhtopmode(ni, vhtop_ie);
305 ieee80211_setup_vht_rates(struct ieee80211_node *ni,
306 const uint8_t *vhtcap_ie,
307 const uint8_t *vhtop_ie)
310 //printf("%s: called\n", __func__);
315 ieee80211_vht_timeout(struct ieee80211com *ic)
320 ieee80211_vht_node_join(struct ieee80211_node *ni)
323 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
324 "%s: called", __func__);
328 ieee80211_vht_node_leave(struct ieee80211_node *ni)
331 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
332 "%s: called", __func__);
336 * Calculate the VHTCAP IE for a given node.
338 * This includes calculating the capability intersection based on the
339 * current operating mode and intersection of the TX/RX MCS maps.
341 * The standard only makes it clear about MCS rate negotiation
342 * and MCS basic rates (which must be a subset of the general
343 * negotiated rates). It doesn't make it clear that the AP should
344 * figure out the minimum functional overlap with the STA and
347 * Note: this is in host order, not in 802.11 endian order.
349 * TODO: ensure I re-read 9.7.11 Rate Selection for VHT STAs.
351 * TODO: investigate what we should negotiate for MU-MIMO beamforming
354 * opmode is '1' for "vhtcap as if I'm a STA", 0 otherwise.
357 ieee80211_vht_get_vhtcap_ie(struct ieee80211_node *ni,
358 struct ieee80211_ie_vhtcap *vhtcap, int opmode)
360 struct ieee80211vap *vap = ni->ni_vap;
361 // struct ieee80211com *ic = vap->iv_ic;
362 uint32_t val, val1, val2;
366 vhtcap->ie = IEEE80211_ELEMID_VHT_CAP;
367 vhtcap->len = sizeof(struct ieee80211_ie_vhtcap) - 2;
370 * Capabilities - it depends on whether we are a station
376 * Station - use our desired configuration based on
377 * local config, local device bits and the already-learnt
378 * vhtcap/vhtinfo IE in the node.
381 /* Limit MPDU size to the smaller of the two */
382 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_MAX_MPDU_MASK);
384 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_MAX_MPDU_MASK);
386 val = MIN(val1, val2);
387 new_vhtcap |= SM(val, IEEE80211_VHTCAP_MAX_MPDU_MASK);
389 /* Limit supp channel config */
390 val2 = val1 = MS(vap->iv_vhtcaps,
391 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
393 val2 = MS(ni->ni_vhtcap,
394 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
397 ((vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80P80) == 0))
400 ((vap->iv_flags_vht & IEEE80211_FVHT_USEVHT160) == 0))
402 val = MIN(val1, val2);
403 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
406 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_RXLDPC);
408 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_RXLDPC);
410 val = MIN(val1, val2);
411 new_vhtcap |= SM(val, IEEE80211_VHTCAP_RXLDPC);
414 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_SHORT_GI_80);
416 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_SHORT_GI_80);
418 val = MIN(val1, val2);
419 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SHORT_GI_80);
422 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_SHORT_GI_160);
424 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_SHORT_GI_160);
426 val = MIN(val1, val2);
427 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SHORT_GI_160);
430 * STBC is slightly more complicated.
432 * In non-STA mode, we just announce our capabilities and that
435 * In STA mode, we should calculate our capabilities based on
436 * local capabilities /and/ what the remote says. So:
438 * + Only TX STBC if we support it and the remote supports RX STBC;
439 * + Only announce RX STBC if we support it and the remote supports
441 * + RX STBC should be the minimum of local and remote RX STBC;
445 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_TXSTBC);
447 /* STA mode - enable it only if node RXSTBC is non-zero */
448 val2 = !! MS(ni->ni_vhtcap, IEEE80211_VHTCAP_RXSTBC_MASK);
450 val = MIN(val1, val2);
451 /* XXX For now, use the 11n config flag */
452 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_TX) == 0)
454 new_vhtcap |= SM(val, IEEE80211_VHTCAP_TXSTBC);
457 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_RXSTBC_MASK);
459 /* STA mode - enable it only if node TXSTBC is non-zero */
460 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_TXSTBC);
462 val = MIN(val1, val2);
463 /* XXX For now, use the 11n config flag */
464 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
466 new_vhtcap |= SM(val, IEEE80211_VHTCAP_RXSTBC_MASK);
469 * Finally - if RXSTBC is 0, then don't enable TXSTBC.
470 * Strictly speaking a device can TXSTBC and not RXSTBC, but
474 new_vhtcap &= ~IEEE80211_VHTCAP_TXSTBC;
477 * Some of these fields require other fields to exist.
478 * So before using it, the parent field needs to be checked
479 * otherwise the overridden value may be wrong.
481 * For example, if SU beamformee is set to 0, then BF STS
485 /* SU Beamformer capable */
486 val2 = val1 = MS(vap->iv_vhtcaps,
487 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
489 val2 = MS(ni->ni_vhtcap,
490 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
492 val = MIN(val1, val2);
493 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
495 /* SU Beamformee capable */
496 val2 = val1 = MS(vap->iv_vhtcaps,
497 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
499 val2 = MS(ni->ni_vhtcap,
500 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
502 val = MIN(val1, val2);
503 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
505 /* Beamformee STS capability - only if SU beamformee capable */
506 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
508 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
510 val = MIN(val1, val2);
511 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE) == 0)
513 new_vhtcap |= SM(val, IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
515 /* Sounding dimensions - only if SU beamformer capable */
516 val2 = val1 = MS(vap->iv_vhtcaps,
517 IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
519 val2 = MS(ni->ni_vhtcap,
520 IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
521 val = MIN(val1, val2);
522 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE) == 0)
524 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
527 * MU Beamformer capable - only if SU BFF capable, MU BFF capable
530 val2 = val1 = MS(vap->iv_vhtcaps,
531 IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE);
533 val2 = MS(ni->ni_vhtcap,
534 IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE);
535 val = MIN(val1, val2);
536 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE) == 0)
538 if (opmode != 1) /* Only enable for STA mode */
540 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
543 * MU Beamformee capable - only if SU BFE capable, MU BFE capable
546 val2 = val1 = MS(vap->iv_vhtcaps,
547 IEEE80211_VHTCAP_MU_BEAMFORMEE_CAPABLE);
549 val2 = MS(ni->ni_vhtcap,
550 IEEE80211_VHTCAP_MU_BEAMFORMEE_CAPABLE);
551 val = MIN(val1, val2);
552 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE) == 0)
554 if (opmode != 0) /* Only enable for AP mode */
556 new_vhtcap |= SM(val, IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
559 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_VHT_TXOP_PS);
561 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_VHT_TXOP_PS);
562 val = MIN(val1, val2);
563 new_vhtcap |= SM(val, IEEE80211_VHTCAP_VHT_TXOP_PS);
566 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_HTC_VHT);
568 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_HTC_VHT);
569 val = MIN(val1, val2);
570 new_vhtcap |= SM(val, IEEE80211_VHTCAP_HTC_VHT);
572 /* A-MPDU length max */
573 /* XXX TODO: we need a userland config knob for this */
574 val2 = val1 = MS(vap->iv_vhtcaps,
575 IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
577 val2 = MS(ni->ni_vhtcap,
578 IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
579 val = MIN(val1, val2);
580 new_vhtcap |= SM(val, IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
583 * Link adaptation is only valid if HTC-VHT capable is 1.
584 * Otherwise, always set it to 0.
586 val2 = val1 = MS(vap->iv_vhtcaps,
587 IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
589 val2 = MS(ni->ni_vhtcap,
590 IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
591 val = MIN(val1, val2);
592 if ((new_vhtcap & IEEE80211_VHTCAP_HTC_VHT) == 0)
594 new_vhtcap |= SM(val, IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
597 * The following two options are 0 if the pattern may change, 1 if it
598 * does not change. So, downgrade to the higher value.
601 /* RX antenna pattern */
602 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
604 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
605 val = MAX(val1, val2);
606 new_vhtcap |= SM(val, IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
608 /* TX antenna pattern */
609 val2 = val1 = MS(vap->iv_vhtcaps, IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
611 val2 = MS(ni->ni_vhtcap, IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
612 val = MAX(val1, val2);
613 new_vhtcap |= SM(val, IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
616 * MCS set - again, we announce what we want to use
617 * based on configuration, device capabilities and
618 * already-learnt vhtcap/vhtinfo IE information.
621 /* MCS set - start with whatever the device supports */
622 vhtcap->supp_mcs.rx_mcs_map = vap->iv_vht_mcsinfo.rx_mcs_map;
623 vhtcap->supp_mcs.rx_highest = 0;
624 vhtcap->supp_mcs.tx_mcs_map = vap->iv_vht_mcsinfo.tx_mcs_map;
625 vhtcap->supp_mcs.tx_highest = 0;
627 vhtcap->vht_cap_info = new_vhtcap;
630 * Now, if we're a STA, mask off whatever the AP doesn't support.
631 * Ie, we continue to state we can receive whatever we can do,
632 * but we only announce that we will transmit rates that meet
633 * the AP requirement.
635 * Note: 0 - MCS0..7; 1 - MCS0..8; 2 - MCS0..9; 3 = not supported.
636 * We can't just use MIN() because '3' means "no", so special case it.
639 for (i = 0; i < 8; i++) {
640 val1 = (vhtcap->supp_mcs.tx_mcs_map >> (i*2)) & 0x3;
641 val2 = (ni->ni_vht_mcsinfo.tx_mcs_map >> (i*2)) & 0x3;
642 val = MIN(val1, val2);
643 if (val1 == 3 || val2 == 3)
645 vhtcap->supp_mcs.tx_mcs_map &= ~(0x3 << (i*2));
646 vhtcap->supp_mcs.tx_mcs_map |= (val << (i*2));
652 * Add a VHTCAP field.
654 * If in station mode, we announce what we would like our
655 * desired configuration to be.
657 * Else, we announce our capabilities based on our current
661 ieee80211_add_vhtcap(uint8_t *frm, struct ieee80211_node *ni)
663 struct ieee80211_ie_vhtcap vhtcap;
667 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA)
670 ieee80211_vht_get_vhtcap_ie(ni, &vhtcap, opmode);
672 memset(frm, '\0', sizeof(struct ieee80211_ie_vhtcap));
674 frm[0] = IEEE80211_ELEMID_VHT_CAP;
675 frm[1] = sizeof(struct ieee80211_ie_vhtcap) - 2;
678 /* 32-bit VHT capability */
679 ADDWORD(frm, vhtcap.vht_cap_info);
682 ADDSHORT(frm, vhtcap.supp_mcs.rx_mcs_map);
683 ADDSHORT(frm, vhtcap.supp_mcs.rx_highest);
684 ADDSHORT(frm, vhtcap.supp_mcs.tx_mcs_map);
685 ADDSHORT(frm, vhtcap.supp_mcs.tx_highest);
691 ieee80211_vht_get_chwidth_ie(struct ieee80211_channel *c)
695 * XXX TODO: look at the node configuration as
699 if (IEEE80211_IS_CHAN_VHT160(c)) {
700 return IEEE80211_VHT_CHANWIDTH_160MHZ;
702 if (IEEE80211_IS_CHAN_VHT80_80(c)) {
703 return IEEE80211_VHT_CHANWIDTH_80P80MHZ;
705 if (IEEE80211_IS_CHAN_VHT80(c)) {
706 return IEEE80211_VHT_CHANWIDTH_80MHZ;
708 if (IEEE80211_IS_CHAN_VHT40(c)) {
709 return IEEE80211_VHT_CHANWIDTH_USE_HT;
711 if (IEEE80211_IS_CHAN_VHT20(c)) {
712 return IEEE80211_VHT_CHANWIDTH_USE_HT;
715 /* We shouldn't get here */
716 printf("%s: called on a non-VHT channel (freq=%d, flags=0x%08x\n",
720 return IEEE80211_VHT_CHANWIDTH_USE_HT;
724 * Note: this just uses the current channel information;
725 * it doesn't use the node info after parsing.
727 * XXX TODO: need to make the basic MCS set configurable.
728 * XXX TODO: read 802.11-2013 to determine what to set
729 * chwidth to when scanning. I have a feeling
730 * it isn't involved in scanning and we shouldn't
731 * be sending it; and I don't yet know what to set
732 * it to for IBSS or hostap where the peer may be
733 * a completely different channel width to us.
736 ieee80211_add_vhtinfo(uint8_t *frm, struct ieee80211_node *ni)
738 memset(frm, '\0', sizeof(struct ieee80211_ie_vht_operation));
740 frm[0] = IEEE80211_ELEMID_VHT_OPMODE;
741 frm[1] = sizeof(struct ieee80211_ie_vht_operation) - 2;
744 /* 8-bit chanwidth */
745 *frm++ = ieee80211_vht_get_chwidth_ie(ni->ni_chan);
748 *frm++ = ni->ni_chan->ic_vht_ch_freq1;
751 *frm++ = ni->ni_chan->ic_vht_ch_freq2;
753 /* 16-bit basic MCS set - just MCS0..7 for NSS=1 for now */
754 ADDSHORT(frm, 0xfffc);
760 ieee80211_vht_update_cap(struct ieee80211_node *ni, const uint8_t *vhtcap_ie,
761 const uint8_t *vhtop_ie)
764 ieee80211_parse_vhtcap(ni, vhtcap_ie);
765 ieee80211_parse_vhtopmode(ni, vhtop_ie);
768 static struct ieee80211_channel *
769 findvhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int vhtflags)
772 return (ieee80211_find_channel(ic, c->ic_freq,
773 (c->ic_flags & ~IEEE80211_CHAN_VHT) | vhtflags));
777 * Handle channel promotion to VHT, similar to ieee80211_ht_adjust_channel().
779 struct ieee80211_channel *
780 ieee80211_vht_adjust_channel(struct ieee80211com *ic,
781 struct ieee80211_channel *chan, int flags)
783 struct ieee80211_channel *c;
785 /* First case - handle channel demotion - if VHT isn't set */
786 if ((flags & IEEE80211_FVHT_VHT) == 0) {
788 printf("%s: demoting channel %d/0x%08x\n", __func__,
789 chan->ic_ieee, chan->ic_flags);
791 c = ieee80211_find_channel(ic, chan->ic_freq,
792 chan->ic_flags & ~IEEE80211_CHAN_VHT);
796 printf("%s: .. to %d/0x%08x\n", __func__,
797 c->ic_ieee, c->ic_flags);
803 * We can upgrade to VHT - attempt to do so
805 * Note: we don't clear the HT flags, these are the hints
806 * for HT40U/HT40D when selecting VHT40 or larger channels.
808 /* Start with VHT80 */
810 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT160))
811 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80);
813 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80P80))
814 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80_80);
816 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80))
817 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80);
819 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
820 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40U);
821 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
822 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40D);
824 * If we get here, VHT20 is always possible because we checked
825 * for IEEE80211_FVHT_VHT above.
828 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT20);
834 printf("%s: selected %d/0x%08x\n", __func__, c->ic_ieee, c->ic_flags);
840 * Calculate the VHT operation IE for a given node.
842 * This includes calculating the suitable channel width/parameters
845 * TODO: ensure I read 9.7.11 Rate Selection for VHT STAs.
846 * TODO: ensure I read 10.39.7 - BSS Basic VHT-MCS and NSS set operation.
849 ieee80211_vht_get_vhtinfo_ie(struct ieee80211_node *ni,
850 struct ieee80211_ie_vht_operation *vhtop, int opmode)
852 printf("%s: called; TODO!\n", __func__);