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.
27 * IEEE 802.11ac-2013 protocol support.
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/systm.h>
37 #include <sys/endian.h>
39 #include <sys/socket.h>
42 #include <net/if_var.h>
43 #include <net/if_media.h>
44 #include <net/ethernet.h>
46 #include <net80211/ieee80211_var.h>
47 #include <net80211/ieee80211_action.h>
48 #include <net80211/ieee80211_input.h>
49 #include <net80211/ieee80211_vht.h>
51 #define ADDSHORT(frm, v) do { \
52 frm[0] = (v) & 0xff; \
56 #define ADDWORD(frm, v) do { \
57 frm[0] = (v) & 0xff; \
58 frm[1] = ((v) >> 8) & 0xff; \
59 frm[2] = ((v) >> 16) & 0xff; \
60 frm[3] = ((v) >> 24) & 0xff; \
67 * + handle WLAN_ACTION_VHT_OPMODE_NOTIF and other VHT action frames
68 * + ensure vhtinfo/vhtcap parameters correctly use the negotiated
69 * capabilities and ratesets
70 * + group ID management operation
74 * XXX TODO: handle WLAN_ACTION_VHT_OPMODE_NOTIF
76 * Look at mac80211/vht.c:ieee80211_vht_handle_opmode() for further details.
80 vht_recv_action_placeholder(struct ieee80211_node *ni,
81 const struct ieee80211_frame *wh,
82 const uint8_t *frm, const uint8_t *efrm)
85 #ifdef IEEE80211_DEBUG
86 ieee80211_note(ni->ni_vap, "%s: called; fc=0x%.2x/0x%.2x",
87 __func__, wh->i_fc[0], wh->i_fc[1]);
93 vht_send_action_placeholder(struct ieee80211_node *ni,
94 int category, int action, void *arg0)
97 #ifdef IEEE80211_DEBUG
98 ieee80211_note(ni->ni_vap, "%s: called; category=%d, action=%d",
99 __func__, category, action);
105 ieee80211_vht_init(void)
108 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
109 WLAN_ACTION_VHT_COMPRESSED_BF, vht_recv_action_placeholder);
110 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
111 WLAN_ACTION_VHT_GROUPID_MGMT, vht_recv_action_placeholder);
112 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_VHT,
113 WLAN_ACTION_VHT_OPMODE_NOTIF, vht_recv_action_placeholder);
115 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
116 WLAN_ACTION_VHT_COMPRESSED_BF, vht_send_action_placeholder);
117 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
118 WLAN_ACTION_VHT_GROUPID_MGMT, vht_send_action_placeholder);
119 ieee80211_send_action_register(IEEE80211_ACTION_CAT_VHT,
120 WLAN_ACTION_VHT_OPMODE_NOTIF, vht_send_action_placeholder);
123 SYSINIT(wlan_vht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_vht_init, NULL);
126 ieee80211_vht_attach(struct ieee80211com *ic)
131 ieee80211_vht_detach(struct ieee80211com *ic)
136 ieee80211_vht_vattach(struct ieee80211vap *vap)
138 struct ieee80211com *ic = vap->iv_ic;
140 if (! IEEE80211_CONF_VHT(ic))
143 vap->iv_vht_cap.vht_cap_info = ic->ic_vht_cap.vht_cap_info;
144 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
146 /* XXX assume VHT80 support; should really check vhtcaps */
149 | IEEE80211_FVHT_USEVHT40
150 | IEEE80211_FVHT_USEVHT80;
151 if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(vap->iv_vht_cap.vht_cap_info))
152 vap->iv_vht_flags |= IEEE80211_FVHT_USEVHT160;
153 if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ(vap->iv_vht_cap.vht_cap_info))
154 vap->iv_vht_flags |= IEEE80211_FVHT_USEVHT80P80;
156 memcpy(&vap->iv_vht_cap.supp_mcs, &ic->ic_vht_cap.supp_mcs,
157 sizeof(struct ieee80211_vht_mcs_info));
161 ieee80211_vht_vdetach(struct ieee80211vap *vap)
167 vht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
173 vht_mcs_to_num(int m)
177 case IEEE80211_VHT_MCS_SUPPORT_0_7:
179 case IEEE80211_VHT_MCS_SUPPORT_0_8:
181 case IEEE80211_VHT_MCS_SUPPORT_0_9:
189 ieee80211_vht_announce(struct ieee80211com *ic)
193 if (! IEEE80211_CONF_VHT(ic))
197 ic_printf(ic, "[VHT] Channel Widths: 20MHz, 40MHz, 80MHz%s%s\n",
198 (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(ic->ic_vht_cap.vht_cap_info)) ?
200 (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ(ic->ic_vht_cap.vht_cap_info)) ?
203 ic_printf(ic, "[VHT] Features: %b\n", ic->ic_vht_cap.vht_cap_info,
204 IEEE80211_VHTCAP_BITS);
206 /* For now, just 5GHz VHT. Worry about 2GHz VHT later */
207 for (i = 0; i < 8; i++) {
208 /* Each stream is 2 bits */
209 tx = (ic->ic_vht_cap.supp_mcs.tx_mcs_map >> (2*i)) & 0x3;
210 rx = (ic->ic_vht_cap.supp_mcs.rx_mcs_map >> (2*i)) & 0x3;
211 if (tx == 3 && rx == 3)
213 ic_printf(ic, "[VHT] NSS %d: TX MCS 0..%d, RX MCS 0..%d\n",
214 i + 1, vht_mcs_to_num(tx), vht_mcs_to_num(rx));
219 ieee80211_vht_node_init(struct ieee80211_node *ni)
222 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
223 "%s: called", __func__);
224 ni->ni_flags |= IEEE80211_NODE_VHT;
228 ieee80211_vht_node_cleanup(struct ieee80211_node *ni)
231 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
232 "%s: called", __func__);
233 ni->ni_flags &= ~IEEE80211_NODE_VHT;
235 bzero(&ni->ni_vht_mcsinfo, sizeof(struct ieee80211_vht_mcs_info));
239 * Parse an 802.11ac VHT operation IE.
242 ieee80211_parse_vhtopmode(struct ieee80211_node *ni, const uint8_t *ie)
245 ni->ni_vht_chanwidth = ie[2];
246 ni->ni_vht_chan1 = ie[3];
247 ni->ni_vht_chan2 = ie[4];
248 ni->ni_vht_basicmcs = le16dec(ie + 5);
251 printf("%s: chan1=%d, chan2=%d, chanwidth=%d, basicmcs=0x%04x\n",
252 __func__, ni->ni_vht_chan1, ni->ni_vht_chan2, ni->ni_vht_chanwidth,
253 ni->ni_vht_basicmcs);
258 * Parse an 802.11ac VHT capability IE.
261 ieee80211_parse_vhtcap(struct ieee80211_node *ni, const uint8_t *ie)
265 ni->ni_vhtcap = le32dec(ie + 2);
268 ni->ni_vht_mcsinfo.rx_mcs_map = le16dec(ie + 6);
269 ni->ni_vht_mcsinfo.rx_highest = le16dec(ie + 8);
270 ni->ni_vht_mcsinfo.tx_mcs_map = le16dec(ie + 10);
271 ni->ni_vht_mcsinfo.tx_highest = le16dec(ie + 12);
275 ieee80211_vht_updateparams(struct ieee80211_node *ni,
276 const uint8_t *vhtcap_ie,
277 const uint8_t *vhtop_ie)
280 //printf("%s: called\n", __func__);
282 ieee80211_parse_vhtcap(ni, vhtcap_ie);
283 ieee80211_parse_vhtopmode(ni, vhtop_ie);
288 ieee80211_setup_vht_rates(struct ieee80211_node *ni,
289 const uint8_t *vhtcap_ie,
290 const uint8_t *vhtop_ie)
293 //printf("%s: called\n", __func__);
298 ieee80211_vht_timeout(struct ieee80211vap *vap)
303 ieee80211_vht_node_join(struct ieee80211_node *ni)
306 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
307 "%s: called", __func__);
311 ieee80211_vht_node_leave(struct ieee80211_node *ni)
314 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
315 "%s: called", __func__);
319 * Calculate the VHTCAP IE for a given node.
321 * This includes calculating the capability intersection based on the
322 * current operating mode and intersection of the TX/RX MCS maps.
324 * The standard only makes it clear about MCS rate negotiation
325 * and MCS basic rates (which must be a subset of the general
326 * negotiated rates). It doesn't make it clear that the AP should
327 * figure out the minimum functional overlap with the STA and
330 * Note: this is in host order, not in 802.11 endian order.
332 * TODO: ensure I re-read 9.7.11 Rate Selection for VHT STAs.
334 * TODO: investigate what we should negotiate for MU-MIMO beamforming
337 * opmode is '1' for "vhtcap as if I'm a STA", 0 otherwise.
340 ieee80211_vht_get_vhtcap_ie(struct ieee80211_node *ni,
341 struct ieee80211_vht_cap *vhtcap, int opmode)
343 struct ieee80211vap *vap = ni->ni_vap;
344 // struct ieee80211com *ic = vap->iv_ic;
345 uint32_t val, val1, val2;
350 * Capabilities - it depends on whether we are a station
356 * Station - use our desired configuration based on
357 * local config, local device bits and the already-learnt
358 * vhtcap/vhtinfo IE in the node.
361 /* Limit MPDU size to the smaller of the two */
362 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
363 IEEE80211_VHTCAP_MAX_MPDU_MASK);
365 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
366 IEEE80211_VHTCAP_MAX_MPDU_MASK);
368 val = MIN(val1, val2);
369 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_MAX_MPDU_MASK);
371 /* Limit supp channel config */
372 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
373 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
375 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
376 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
379 ((vap->iv_vht_flags & IEEE80211_FVHT_USEVHT80P80) == 0))
382 ((vap->iv_vht_flags & IEEE80211_FVHT_USEVHT160) == 0))
384 val = MIN(val1, val2);
385 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
386 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK);
389 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
390 IEEE80211_VHTCAP_RXLDPC);
392 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
393 IEEE80211_VHTCAP_RXLDPC);
395 val = MIN(val1, val2);
396 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_RXLDPC);
399 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
400 IEEE80211_VHTCAP_SHORT_GI_80);
402 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
403 IEEE80211_VHTCAP_SHORT_GI_80);
405 val = MIN(val1, val2);
406 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_SHORT_GI_80);
409 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
410 IEEE80211_VHTCAP_SHORT_GI_160);
412 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
413 IEEE80211_VHTCAP_SHORT_GI_160);
415 val = MIN(val1, val2);
416 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_SHORT_GI_160);
419 * STBC is slightly more complicated.
421 * In non-STA mode, we just announce our capabilities and that
424 * In STA mode, we should calculate our capabilities based on
425 * local capabilities /and/ what the remote says. So:
427 * + Only TX STBC if we support it and the remote supports RX STBC;
428 * + Only announce RX STBC if we support it and the remote supports
430 * + RX STBC should be the minimum of local and remote RX STBC;
434 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
435 IEEE80211_VHTCAP_TXSTBC);
437 /* STA mode - enable it only if node RXSTBC is non-zero */
438 val2 = !! _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
439 IEEE80211_VHTCAP_RXSTBC_MASK);
441 val = MIN(val1, val2);
442 /* XXX For now, use the 11n config flag */
443 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_TX) == 0)
445 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_TXSTBC);
448 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
449 IEEE80211_VHTCAP_RXSTBC_MASK);
451 /* STA mode - enable it only if node TXSTBC is non-zero */
452 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
453 IEEE80211_VHTCAP_TXSTBC);
455 val = MIN(val1, val2);
456 /* XXX For now, use the 11n config flag */
457 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
459 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_RXSTBC_MASK);
462 * Finally - if RXSTBC is 0, then don't enable TXSTBC.
463 * Strictly speaking a device can TXSTBC and not RXSTBC, but
467 new_vhtcap &= ~IEEE80211_VHTCAP_TXSTBC;
470 * Some of these fields require other fields to exist.
471 * So before using it, the parent field needs to be checked
472 * otherwise the overridden value may be wrong.
474 * For example, if SU beamformee is set to 0, then BF STS
478 /* SU Beamformer capable */
479 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
480 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
482 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
483 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
485 val = MIN(val1, val2);
486 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
487 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
489 /* SU Beamformee capable */
490 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
491 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
493 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
494 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
496 val = MIN(val1, val2);
497 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
498 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
500 /* Beamformee STS capability - only if SU beamformee capable */
501 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
502 IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
504 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
505 IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
507 val = MIN(val1, val2);
508 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE) == 0)
510 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
511 IEEE80211_VHTCAP_BEAMFORMEE_STS_MASK);
513 /* Sounding dimensions - only if SU beamformer capable */
514 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
515 IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
517 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
518 IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
519 val = MIN(val1, val2);
520 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE) == 0)
522 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
523 IEEE80211_VHTCAP_SOUNDING_DIMENSIONS_MASK);
526 * MU Beamformer capable - only if SU BFF capable, MU BFF capable
529 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
530 IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE);
532 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
533 IEEE80211_VHTCAP_MU_BEAMFORMER_CAPABLE);
534 val = MIN(val1, val2);
535 if ((new_vhtcap & IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE) == 0)
537 if (opmode != 1) /* Only enable for STA mode */
539 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
540 IEEE80211_VHTCAP_SU_BEAMFORMER_CAPABLE);
543 * MU Beamformee capable - only if SU BFE capable, MU BFE capable
546 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
547 IEEE80211_VHTCAP_MU_BEAMFORMEE_CAPABLE);
549 val2 = _IEEE80211_MASKSHIFT(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 |= _IEEE80211_SHIFTMASK(val,
557 IEEE80211_VHTCAP_SU_BEAMFORMEE_CAPABLE);
560 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
561 IEEE80211_VHTCAP_VHT_TXOP_PS);
563 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
564 IEEE80211_VHTCAP_VHT_TXOP_PS);
565 val = MIN(val1, val2);
566 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_VHT_TXOP_PS);
569 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
570 IEEE80211_VHTCAP_HTC_VHT);
572 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
573 IEEE80211_VHTCAP_HTC_VHT);
574 val = MIN(val1, val2);
575 new_vhtcap |= _IEEE80211_SHIFTMASK(val, IEEE80211_VHTCAP_HTC_VHT);
577 /* A-MPDU length max */
578 /* XXX TODO: we need a userland config knob for this */
579 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
580 IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
582 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
583 IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
584 val = MIN(val1, val2);
585 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
586 IEEE80211_VHTCAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
589 * Link adaptation is only valid if HTC-VHT capable is 1.
590 * Otherwise, always set it to 0.
592 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
593 IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
595 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
596 IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
597 val = MIN(val1, val2);
598 if ((new_vhtcap & IEEE80211_VHTCAP_HTC_VHT) == 0)
600 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
601 IEEE80211_VHTCAP_VHT_LINK_ADAPTATION_VHT_MASK);
604 * The following two options are 0 if the pattern may change, 1 if it
605 * does not change. So, downgrade to the higher value.
608 /* RX antenna pattern */
609 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
610 IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
612 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
613 IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
614 val = MAX(val1, val2);
615 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
616 IEEE80211_VHTCAP_RX_ANTENNA_PATTERN);
618 /* TX antenna pattern */
619 val2 = val1 = _IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
620 IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
622 val2 = _IEEE80211_MASKSHIFT(ni->ni_vhtcap,
623 IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
624 val = MAX(val1, val2);
625 new_vhtcap |= _IEEE80211_SHIFTMASK(val,
626 IEEE80211_VHTCAP_TX_ANTENNA_PATTERN);
629 * MCS set - again, we announce what we want to use
630 * based on configuration, device capabilities and
631 * already-learnt vhtcap/vhtinfo IE information.
634 /* MCS set - start with whatever the device supports */
635 vhtcap->supp_mcs.rx_mcs_map = vap->iv_vht_cap.supp_mcs.rx_mcs_map;
636 vhtcap->supp_mcs.rx_highest = 0;
637 vhtcap->supp_mcs.tx_mcs_map = vap->iv_vht_cap.supp_mcs.tx_mcs_map;
638 vhtcap->supp_mcs.tx_highest = 0;
640 vhtcap->vht_cap_info = new_vhtcap;
643 * Now, if we're a STA, mask off whatever the AP doesn't support.
644 * Ie, we continue to state we can receive whatever we can do,
645 * but we only announce that we will transmit rates that meet
646 * the AP requirement.
648 * Note: 0 - MCS0..7; 1 - MCS0..8; 2 - MCS0..9; 3 = not supported.
649 * We can't just use MIN() because '3' means "no", so special case it.
652 for (i = 0; i < 8; i++) {
653 val1 = (vhtcap->supp_mcs.tx_mcs_map >> (i*2)) & 0x3;
654 val2 = (ni->ni_vht_mcsinfo.tx_mcs_map >> (i*2)) & 0x3;
655 val = MIN(val1, val2);
656 if (val1 == 3 || val2 == 3)
658 vhtcap->supp_mcs.tx_mcs_map &= ~(0x3 << (i*2));
659 vhtcap->supp_mcs.tx_mcs_map |= (val << (i*2));
665 * Add a VHTCAP field.
667 * If in station mode, we announce what we would like our
668 * desired configuration to be.
670 * Else, we announce our capabilities based on our current
674 ieee80211_add_vhtcap(uint8_t *frm, struct ieee80211_node *ni)
676 struct ieee80211_vht_cap vhtcap;
678 ieee80211_vht_get_vhtcap_ie(ni, &vhtcap, 1);
680 frm[0] = IEEE80211_ELEMID_VHT_CAP;
681 frm[1] = sizeof(vhtcap);
684 /* 32-bit VHT capability */
685 ADDWORD(frm, vhtcap.vht_cap_info);
688 ADDSHORT(frm, vhtcap.supp_mcs.rx_mcs_map);
689 ADDSHORT(frm, vhtcap.supp_mcs.rx_highest);
690 ADDSHORT(frm, vhtcap.supp_mcs.tx_mcs_map);
691 ADDSHORT(frm, vhtcap.supp_mcs.tx_highest);
697 * Non-associated probe requests. Add VHT capabilities based on
698 * the current channel configuration. No BSS yet.
701 ieee80211_add_vhtcap_ch(uint8_t *frm, struct ieee80211vap *vap,
702 struct ieee80211_channel *c)
704 struct ieee80211_vht_cap *vhtcap;
706 memset(frm, 0, 2 + sizeof(*vhtcap));
707 frm[0] = IEEE80211_ELEMID_VHT_CAP;
708 frm[1] = sizeof(*vhtcap);
711 /* 32-bit VHT capability */
712 ADDWORD(frm, vap->iv_vht_cap.vht_cap_info);
715 ADDSHORT(frm, vap->iv_vht_cap.supp_mcs.rx_mcs_map);
716 ADDSHORT(frm, vap->iv_vht_cap.supp_mcs.rx_highest);
717 ADDSHORT(frm, vap->iv_vht_cap.supp_mcs.tx_mcs_map);
718 ADDSHORT(frm, vap->iv_vht_cap.supp_mcs.tx_highest);
724 ieee80211_vht_get_chwidth_ie(struct ieee80211_channel *c)
728 * XXX TODO: look at the node configuration as
732 if (IEEE80211_IS_CHAN_VHT80P80(c))
733 return IEEE80211_VHT_CHANWIDTH_80P80MHZ;
734 if (IEEE80211_IS_CHAN_VHT160(c))
735 return IEEE80211_VHT_CHANWIDTH_160MHZ;
736 if (IEEE80211_IS_CHAN_VHT80(c))
737 return IEEE80211_VHT_CHANWIDTH_80MHZ;
738 if (IEEE80211_IS_CHAN_VHT40(c))
739 return IEEE80211_VHT_CHANWIDTH_USE_HT;
740 if (IEEE80211_IS_CHAN_VHT20(c))
741 return IEEE80211_VHT_CHANWIDTH_USE_HT;
743 /* We shouldn't get here */
744 printf("%s: called on a non-VHT channel (freq=%d, flags=0x%08x\n",
745 __func__, (int) c->ic_freq, c->ic_flags);
746 return IEEE80211_VHT_CHANWIDTH_USE_HT;
750 * Note: this just uses the current channel information;
751 * it doesn't use the node info after parsing.
753 * XXX TODO: need to make the basic MCS set configurable.
754 * XXX TODO: read 802.11-2013 to determine what to set
755 * chwidth to when scanning. I have a feeling
756 * it isn't involved in scanning and we shouldn't
757 * be sending it; and I don't yet know what to set
758 * it to for IBSS or hostap where the peer may be
759 * a completely different channel width to us.
762 ieee80211_add_vhtinfo(uint8_t *frm, struct ieee80211_node *ni)
765 frm[0] = IEEE80211_ELEMID_VHT_OPMODE;
766 frm[1] = sizeof(struct ieee80211_vht_operation);
769 /* 8-bit chanwidth */
770 *frm++ = ieee80211_vht_get_chwidth_ie(ni->ni_chan);
773 *frm++ = ni->ni_chan->ic_vht_ch_freq1;
776 *frm++ = ni->ni_chan->ic_vht_ch_freq2;
778 /* 16-bit basic MCS set - just MCS0..7 for NSS=1 for now */
779 ADDSHORT(frm, 0xfffc);
785 ieee80211_vht_update_cap(struct ieee80211_node *ni, const uint8_t *vhtcap_ie,
786 const uint8_t *vhtop_ie)
789 ieee80211_parse_vhtcap(ni, vhtcap_ie);
790 ieee80211_parse_vhtopmode(ni, vhtop_ie);
793 static struct ieee80211_channel *
794 findvhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int vhtflags)
797 return (ieee80211_find_channel(ic, c->ic_freq,
798 (c->ic_flags & ~IEEE80211_CHAN_VHT) | vhtflags));
802 * Handle channel promotion to VHT, similar to ieee80211_ht_adjust_channel().
804 struct ieee80211_channel *
805 ieee80211_vht_adjust_channel(struct ieee80211com *ic,
806 struct ieee80211_channel *chan, int flags)
808 struct ieee80211_channel *c;
810 /* First case - handle channel demotion - if VHT isn't set */
811 if ((flags & IEEE80211_FVHT_MASK) == 0) {
813 printf("%s: demoting channel %d/0x%08x\n", __func__,
814 chan->ic_ieee, chan->ic_flags);
816 c = ieee80211_find_channel(ic, chan->ic_freq,
817 chan->ic_flags & ~IEEE80211_CHAN_VHT);
821 printf("%s: .. to %d/0x%08x\n", __func__,
822 c->ic_ieee, c->ic_flags);
828 * We can upgrade to VHT - attempt to do so
830 * Note: we don't clear the HT flags, these are the hints
831 * for HT40U/HT40D when selecting VHT40 or larger channels.
834 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT160))
835 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT160);
837 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80P80))
838 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80P80);
840 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80))
841 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80);
843 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
844 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40U);
845 if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
846 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40D);
848 * If we get here, VHT20 is always possible because we checked
849 * for IEEE80211_FVHT_VHT above.
852 c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT20);
858 printf("%s: selected %d/0x%08x\n", __func__, c->ic_ieee, c->ic_flags);
864 * Calculate the VHT operation IE for a given node.
866 * This includes calculating the suitable channel width/parameters
869 * TODO: ensure I read 9.7.11 Rate Selection for VHT STAs.
870 * TODO: ensure I read 10.39.7 - BSS Basic VHT-MCS and NSS set operation.
873 ieee80211_vht_get_vhtinfo_ie(struct ieee80211_node *ni,
874 struct ieee80211_vht_operation *vhtop, int opmode)
876 printf("%s: called; TODO!\n", __func__);