2 * Copyright (c) 2002-2009 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>
27 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/endian.h>
37 #include <sys/socket.h>
40 #include <net/ethernet.h>
42 #include <net/if_llc.h>
43 #include <net/if_media.h>
45 #include <net80211/ieee80211_var.h>
46 #include <net80211/ieee80211_input.h>
47 #include <net80211/ieee80211_phy.h>
48 #include <net80211/ieee80211_superg.h>
51 * Atheros fast-frame encapsulation format.
53 * 802.2 + FFHDR + HPAD + 802.3 + 802.2 + 1500 + SPAD + 802.3 + 802.2 + 1500:
54 * 8 + 4 + 4 + 14 + 8 + 1500 + 6 + 14 + 8 + 1500
57 /* fast frame header is 32-bits */
58 #define ATH_FF_PROTO 0x0000003f /* protocol */
59 #define ATH_FF_PROTO_S 0
60 #define ATH_FF_FTYPE 0x000000c0 /* frame type */
61 #define ATH_FF_FTYPE_S 6
62 #define ATH_FF_HLEN32 0x00000300 /* optional hdr length */
63 #define ATH_FF_HLEN32_S 8
64 #define ATH_FF_SEQNUM 0x001ffc00 /* sequence number */
65 #define ATH_FF_SEQNUM_S 10
66 #define ATH_FF_OFFSET 0xffe00000 /* offset to 2nd payload */
67 #define ATH_FF_OFFSET_S 21
69 #define ATH_FF_MAX_HDR_PAD 4
70 #define ATH_FF_MAX_SEP_PAD 6
71 #define ATH_FF_MAX_HDR 30
73 #define ATH_FF_PROTO_L2TUNNEL 0 /* L2 tunnel protocol */
74 #define ATH_FF_ETH_TYPE 0x88bd /* Ether type for encapsulated frames */
75 #define ATH_FF_SNAP_ORGCODE_0 0x00
76 #define ATH_FF_SNAP_ORGCODE_1 0x03
77 #define ATH_FF_SNAP_ORGCODE_2 0x7f
79 #define ATH_FF_TXQMIN 2 /* min txq depth for staging */
80 #define ATH_FF_TXQMAX 50 /* maximum # of queued frames allowed */
81 #define ATH_FF_STAGEMAX 5 /* max waiting period for staged frame*/
83 #define ETHER_HEADER_COPY(dst, src) \
84 memcpy(dst, src, sizeof(struct ether_header))
86 /* XXX public for sysctl hookup */
87 int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
88 int ieee80211_ffagemax = -1; /* max time frames held on stage q */
91 ieee80211_superg_attach(struct ieee80211com *ic)
93 struct ieee80211_superg *sg;
95 if (ic->ic_caps & IEEE80211_C_FF) {
96 sg = (struct ieee80211_superg *) malloc(
97 sizeof(struct ieee80211_superg), M_80211_VAP,
100 printf("%s: cannot allocate SuperG state block\n",
106 ieee80211_ffagemax = msecs_to_ticks(150);
110 ieee80211_superg_detach(struct ieee80211com *ic)
112 if (ic->ic_superg != NULL) {
113 free(ic->ic_superg, M_80211_VAP);
114 ic->ic_superg = NULL;
119 ieee80211_superg_vattach(struct ieee80211vap *vap)
121 struct ieee80211com *ic = vap->iv_ic;
123 if (ic->ic_superg == NULL) /* NB: can't do fast-frames w/o state */
124 vap->iv_caps &= ~IEEE80211_C_FF;
125 if (vap->iv_caps & IEEE80211_C_FF)
126 vap->iv_flags |= IEEE80211_F_FF;
127 /* NB: we only implement sta mode */
128 if (vap->iv_opmode == IEEE80211_M_STA &&
129 (vap->iv_caps & IEEE80211_C_TURBOP))
130 vap->iv_flags |= IEEE80211_F_TURBOP;
134 ieee80211_superg_vdetach(struct ieee80211vap *vap)
138 #define ATH_OUI_BYTES 0x00, 0x03, 0x7f
140 * Add a WME information element to a frame.
143 ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
145 static const struct ieee80211_ath_ie info = {
146 .ath_id = IEEE80211_ELEMID_VENDOR,
147 .ath_len = sizeof(struct ieee80211_ath_ie) - 2,
148 .ath_oui = { ATH_OUI_BYTES },
149 .ath_oui_type = ATH_OUI_TYPE,
150 .ath_oui_subtype= ATH_OUI_SUBTYPE,
151 .ath_version = ATH_OUI_VERSION,
153 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
155 memcpy(frm, &info, sizeof(info));
156 ath->ath_capability = caps;
157 if (defkeyix != IEEE80211_KEYIX_NONE) {
158 ath->ath_defkeyix[0] = (defkeyix & 0xff);
159 ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
161 ath->ath_defkeyix[0] = 0xff;
162 ath->ath_defkeyix[1] = 0x7f;
164 return frm + sizeof(info);
169 ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
171 const struct ieee80211vap *vap = bss->ni_vap;
173 return ieee80211_add_ath(frm,
174 vap->iv_flags & IEEE80211_F_ATHEROS,
175 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
176 bss->ni_authmode != IEEE80211_AUTH_8021X) ?
177 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
181 ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
183 const struct ieee80211_ath_ie *ath =
184 (const struct ieee80211_ath_ie *) ie;
186 ni->ni_ath_flags = ath->ath_capability;
187 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
191 ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
192 const struct ieee80211_frame *wh)
194 struct ieee80211vap *vap = ni->ni_vap;
195 const struct ieee80211_ath_ie *ath;
200 if (len < sizeof(struct ieee80211_ath_ie)-2) {
201 IEEE80211_DISCARD_IE(vap,
202 IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
203 wh, "Atheros", "too short, len %u", len);
206 ath = (const struct ieee80211_ath_ie *)frm;
207 capschanged = (ni->ni_ath_flags != ath->ath_capability);
208 defkeyix = LE_READ_2(ath->ath_defkeyix);
209 if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
210 ni->ni_ath_flags = ath->ath_capability;
211 ni->ni_ath_defkeyix = defkeyix;
212 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
213 "ath ie change: new caps 0x%x defkeyix 0x%x",
214 ni->ni_ath_flags, ni->ni_ath_defkeyix);
216 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
217 uint16_t curflags, newflags;
220 * Check for turbo mode switch. Calculate flags
221 * for the new mode and effect the switch.
223 newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
224 /* NB: BOOST is not in ic_flags, so get it from the ie */
225 if (ath->ath_capability & ATHEROS_CAP_BOOST)
226 newflags |= IEEE80211_CHAN_TURBO;
228 newflags &= ~IEEE80211_CHAN_TURBO;
229 if (newflags != curflags)
230 ieee80211_dturbo_switch(vap, newflags);
236 * Decap the encapsulated frame pair and dispatch the first
237 * for delivery. The second frame is returned for delivery
238 * via the normal path.
241 ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
243 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
244 #define MS(x,f) (((x) & f) >> f##_S)
245 struct ieee80211vap *vap = ni->ni_vap;
251 /* NB: we assume caller does this check for us */
252 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
253 ("ff not negotiated"));
255 * Check for fast-frame tunnel encapsulation.
257 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
259 if (m->m_len < FF_LLC_SIZE &&
260 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
261 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
262 ni->ni_macaddr, "fast-frame",
263 "%s", "m_pullup(llc) failed");
264 vap->iv_stats.is_rx_tooshort++;
267 llc = (struct llc *)(mtod(m, uint8_t *) +
268 sizeof(struct ether_header));
269 if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
271 m_adj(m, FF_LLC_SIZE);
272 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
273 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
274 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
275 ni->ni_macaddr, "fast-frame",
276 "unsupport tunnel protocol, header 0x%x", ath);
277 vap->iv_stats.is_ff_badhdr++;
281 /* NB: skip header and alignment padding */
282 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
284 vap->iv_stats.is_ff_decap++;
287 * Decap the first frame, bust it apart from the
288 * second and deliver; then decap the second frame
289 * and return it to the caller for normal delivery.
291 m = ieee80211_decap1(m, &framelen);
293 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
294 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
295 vap->iv_stats.is_ff_tooshort++;
298 n = m_split(m, framelen, M_NOWAIT);
300 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
301 ni->ni_macaddr, "fast-frame",
302 "%s", "unable to split encapsulated frames");
303 vap->iv_stats.is_ff_split++;
304 m_freem(m); /* NB: must reclaim */
307 /* XXX not right for WDS */
308 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
311 * Decap second frame.
313 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
314 n = ieee80211_decap1(n, &framelen);
316 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
317 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
318 vap->iv_stats.is_ff_tooshort++;
320 /* XXX verify framelen against mbuf contents */
321 return n; /* 2nd delivered by caller */
327 * Do Ethernet-LLC encapsulation for each payload in a fast frame
328 * tunnel encapsulation. The frame is assumed to have an Ethernet
329 * header at the front that must be stripped before prepending the
330 * LLC followed by the Ethernet header passed in (with an Ethernet
331 * type that specifies the payload size).
334 ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
335 const struct ether_header *eh)
340 /* XXX optimize by combining m_adj+M_PREPEND */
341 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
342 llc = mtod(m, struct llc *);
343 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
344 llc->llc_control = LLC_UI;
345 llc->llc_snap.org_code[0] = 0;
346 llc->llc_snap.org_code[1] = 0;
347 llc->llc_snap.org_code[2] = 0;
348 llc->llc_snap.ether_type = eh->ether_type;
349 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
351 M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
352 if (m == NULL) { /* XXX cannot happen */
353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
354 "%s: no space for ether_header\n", __func__);
355 vap->iv_stats.is_tx_nobuf++;
358 ETHER_HEADER_COPY(mtod(m, void *), eh);
359 mtod(m, struct ether_header *)->ether_type = htons(payload);
364 * Fast frame encapsulation. There must be two packets
365 * chained with m_nextpkt. We do header adjustment for
366 * each, add the tunnel encapsulation, and then concatenate
367 * the mbuf chains to form a single frame for transmission.
370 ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
371 struct ieee80211_key *key)
374 struct ether_header eh1, eh2;
381 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
382 "%s: only one frame\n", __func__);
385 m1->m_nextpkt = NULL;
387 * Include fast frame headers in adjusting header layout.
389 KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!"));
390 ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t));
391 m1 = ieee80211_mbuf_adjust(vap,
392 hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
393 sizeof(struct ether_header),
396 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
402 * Copy second frame's Ethernet header out of line
403 * and adjust for encapsulation headers. Note that
404 * we make room for padding in case there isn't room
405 * at the end of first frame.
407 KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
408 ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
409 m2 = ieee80211_mbuf_adjust(vap,
410 ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
413 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
418 * Now do tunnel encapsulation. First, each
419 * frame gets a standard encapsulation.
421 m1 = ff_encap1(vap, m1, &eh1);
424 m2 = ff_encap1(vap, m2, &eh2);
429 * Pad leading frame to a 4-byte boundary. If there
430 * is space at the end of the first frame, put it
431 * there; otherwise prepend to the front of the second
432 * frame. We know doing the second will always work
433 * because we reserve space above. We prefer appending
434 * as this typically has better DMA alignment properties.
436 for (m = m1; m->m_next != NULL; m = m->m_next)
438 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
440 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
443 m2->m_pkthdr.len += pad;
444 } else { /* append to first */
446 m1->m_pkthdr.len += pad;
451 * Now, stick 'em together and prepend the tunnel headers;
452 * first the Atheros tunnel header (all zero for now) and
453 * then a special fast frame LLC.
455 * XXX optimize by prepending together
457 m->m_next = m2; /* NB: last mbuf from above */
458 m1->m_pkthdr.len += m2->m_pkthdr.len;
459 M_PREPEND(m1, sizeof(uint32_t)+2, M_DONTWAIT);
460 if (m1 == NULL) { /* XXX cannot happen */
461 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
462 "%s: no space for tunnel header\n", __func__);
463 vap->iv_stats.is_tx_nobuf++;
466 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
468 M_PREPEND(m1, sizeof(struct llc), M_DONTWAIT);
469 if (m1 == NULL) { /* XXX cannot happen */
470 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
471 "%s: no space for llc header\n", __func__);
472 vap->iv_stats.is_tx_nobuf++;
475 llc = mtod(m1, struct llc *);
476 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
477 llc->llc_control = LLC_UI;
478 llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
479 llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
480 llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
481 llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
483 vap->iv_stats.is_ff_encap++;
495 ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
497 struct ieee80211vap *vap = ni->ni_vap;
501 m = ieee80211_encap(vap, ni, m);
503 struct ifnet *ifp = vap->iv_ifp;
504 struct ifnet *parent = ni->ni_ic->ic_ifp;
506 error = parent->if_transmit(parent, m);
508 /* NB: IFQ_HANDOFF reclaims mbuf */
509 ieee80211_free_node(ni);
514 ieee80211_free_node(ni);
518 * Flush frames to device; note we re-use the linked list
519 * the frames were stored on and use the sentinel (unchanged)
520 * which may be non-NULL.
523 ff_flush(struct mbuf *head, struct mbuf *last)
525 struct mbuf *m, *next;
526 struct ieee80211_node *ni;
527 struct ieee80211vap *vap;
529 for (m = head; m != last; m = next) {
533 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
536 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
537 "%s: flush frame, age %u", __func__, M_AGE_GET(m));
538 vap->iv_stats.is_ff_flush++;
545 * Age frames on the staging queue.
548 ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
551 struct ieee80211_superg *sg = ic->ic_superg;
552 struct mbuf *m, *head;
553 struct ieee80211_node *ni;
554 struct ieee80211_tx_ampdu *tap;
556 KASSERT(sq->head != NULL, ("stageq empty"));
560 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
561 /* clear tap ref to frame */
562 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
563 tap = &ni->ni_tx_ampdu[M_WME_GETAC(m)];
564 KASSERT(tap->txa_private == m, ("staging queue empty"));
565 tap->txa_private = NULL;
567 sq->head = m->m_nextpkt;
569 sg->ff_stageqdepth--;
574 M_AGE_SUB(m, quanta);
575 IEEE80211_UNLOCK(ic);
581 stageq_add(struct ieee80211_stageq *sq, struct mbuf *m)
583 int age = ieee80211_ffagemax;
584 if (sq->tail != NULL) {
585 sq->tail->m_nextpkt = m;
586 age -= M_AGE_GET(sq->head);
589 KASSERT(age >= 0, ("age %d", age));
597 stageq_remove(struct ieee80211_stageq *sq, struct mbuf *mstaged)
599 struct mbuf *m, *mprev;
602 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
605 sq->head = m->m_nextpkt;
607 mprev->m_nextpkt = m->m_nextpkt;
615 printf("%s: packet not found\n", __func__);
619 ff_approx_txtime(struct ieee80211_node *ni,
620 const struct mbuf *m1, const struct mbuf *m2)
622 struct ieee80211com *ic = ni->ni_ic;
623 struct ieee80211vap *vap = ni->ni_vap;
627 * Approximate the frame length to be transmitted. A swag to add
628 * the following maximal values to the skb payload:
629 * - 32: 802.11 encap + CRC
630 * - 24: encryption overhead (if wep bit)
631 * - 4 + 6: fast-frame header and padding
632 * - 16: 2 LLC FF tunnel headers
633 * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd)
635 framelen = m1->m_pkthdr.len + 32 +
636 ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR;
637 if (vap->iv_flags & IEEE80211_F_PRIVACY)
640 framelen += m2->m_pkthdr.len;
641 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
645 * Check if the supplied frame can be partnered with an existing
646 * or pending frame. Return a reference to any frame that should be
647 * sent on return; otherwise return NULL.
650 ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
652 struct ieee80211vap *vap = ni->ni_vap;
653 struct ieee80211com *ic = ni->ni_ic;
654 struct ieee80211_superg *sg = ic->ic_superg;
655 const int pri = M_WME_GETAC(m);
656 struct ieee80211_stageq *sq;
657 struct ieee80211_tx_ampdu *tap;
658 struct mbuf *mstaged;
659 uint32_t txtime, limit;
662 * Check if the supplied frame can be aggregated.
664 * NB: we allow EAPOL frames to be aggregated with other ucast traffic.
665 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't
666 * be aggregated with other types of frames when encryption is on?
669 tap = &ni->ni_tx_ampdu[pri];
670 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
671 ieee80211_txampdu_count_packet(tap);
674 * When not in station mode never aggregate a multicast
675 * frame; this insures, for example, that a combined frame
676 * does not require multiple encryption keys.
678 if (vap->iv_opmode != IEEE80211_M_STA &&
679 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
680 /* XXX flush staged frame? */
681 IEEE80211_UNLOCK(ic);
685 * If there is no frame to combine with and the pps is
686 * too low; then do not attempt to aggregate this frame.
688 if (mstaged == NULL &&
689 ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) {
690 IEEE80211_UNLOCK(ic);
693 sq = &sg->ff_stageq[pri];
695 * Check the txop limit to insure the aggregate fits.
697 limit = IEEE80211_TXOP_TO_US(
698 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
700 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
702 * Aggregate too long, return to the caller for direct
703 * transmission. In addition, flush any pending frame
704 * before sending this one.
706 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
707 "%s: txtime %u exceeds txop limit %u\n",
708 __func__, txtime, limit);
710 tap->txa_private = NULL;
712 stageq_remove(sq, mstaged);
713 IEEE80211_UNLOCK(ic);
715 if (mstaged != NULL) {
716 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
717 "%s: flush staged frame", __func__);
719 ff_transmit(ni, mstaged);
721 return m; /* NB: original frame */
724 * An aggregation candidate. If there's a frame to partner
725 * with then combine and return for processing. Otherwise
726 * save this frame and wait for a partner to show up (or
727 * the frame to be flushed). Note that staged frames also
728 * hold their node reference.
730 if (mstaged != NULL) {
731 tap->txa_private = NULL;
732 stageq_remove(sq, mstaged);
733 IEEE80211_UNLOCK(ic);
735 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
736 "%s: aggregate fast-frame", __func__);
738 * Release the node reference; we only need
739 * the one already in mstaged.
741 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
742 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
743 ieee80211_free_node(ni);
746 mstaged->m_nextpkt = m;
747 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
749 KASSERT(tap->txa_private == NULL,
750 ("txa_private %p", tap->txa_private));
751 tap->txa_private = m;
754 sg->ff_stageqdepth++;
755 IEEE80211_UNLOCK(ic);
757 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
758 "%s: stage frame, %u queued", __func__, sq->depth);
759 /* NB: mstaged is NULL */
765 ieee80211_ff_node_init(struct ieee80211_node *ni)
768 * Clean FF state on re-associate. This handles the case
769 * where a station leaves w/o notifying us and then returns
770 * before node is reaped for inactivity.
772 ieee80211_ff_node_cleanup(ni);
776 ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
778 struct ieee80211com *ic = ni->ni_ic;
779 struct ieee80211_superg *sg = ic->ic_superg;
780 struct ieee80211_tx_ampdu *tap;
781 struct mbuf *m, *head;
786 for (ac = 0; ac < WME_NUM_AC; ac++) {
787 tap = &ni->ni_tx_ampdu[ac];
788 m = tap->txa_private;
790 tap->txa_private = NULL;
791 stageq_remove(&sg->ff_stageq[ac], m);
796 IEEE80211_UNLOCK(ic);
798 for (m = head; m != NULL; m = m->m_nextpkt) {
800 ieee80211_free_node(ni);
805 * Switch between turbo and non-turbo operating modes.
806 * Use the specified channel flags to locate the new
807 * channel, update 802.11 state, and then call back into
808 * the driver to effect the change.
811 ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
813 struct ieee80211com *ic = vap->iv_ic;
814 struct ieee80211_channel *chan;
816 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
817 if (chan == NULL) { /* XXX should not happen */
818 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
819 "%s: no channel with freq %u flags 0x%x\n",
820 __func__, ic->ic_bsschan->ic_freq, newflags);
824 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
825 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
826 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
827 ieee80211_phymode_name[ieee80211_chan2mode(chan)],
828 chan->ic_freq, chan->ic_flags);
830 ic->ic_bsschan = chan;
831 ic->ic_prevchan = ic->ic_curchan;
832 ic->ic_curchan = chan;
833 ic->ic_rt = ieee80211_get_ratetable(chan);
834 ic->ic_set_channel(ic);
835 ieee80211_radiotap_chan_change(ic);
836 /* NB: do not need to reset ERP state 'cuz we're in sta mode */
840 * Return the current ``state'' of an Atheros capbility.
841 * If associated in station mode report the negotiated
842 * setting. Otherwise report the current setting.
845 getathcap(struct ieee80211vap *vap, int cap)
847 if (vap->iv_opmode == IEEE80211_M_STA &&
848 vap->iv_state == IEEE80211_S_RUN)
849 return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
851 return (vap->iv_flags & cap) != 0;
855 superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
857 switch (ireq->i_type) {
858 case IEEE80211_IOC_FF:
859 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
861 case IEEE80211_IOC_TURBOP:
862 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
869 IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
872 superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
874 switch (ireq->i_type) {
875 case IEEE80211_IOC_FF:
877 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
879 vap->iv_flags |= IEEE80211_F_FF;
881 vap->iv_flags &= ~IEEE80211_F_FF;
883 case IEEE80211_IOC_TURBOP:
885 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
887 vap->iv_flags |= IEEE80211_F_TURBOP;
889 vap->iv_flags &= ~IEEE80211_F_TURBOP;
896 IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);