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 #ifdef IEEE80211_SUPPORT_SUPERG
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/endian.h>
39 #include <sys/socket.h>
42 #include <net/if_var.h>
43 #include <net/if_llc.h>
44 #include <net/if_media.h>
46 #include <net/ethernet.h>
48 #include <netproto/802_11/ieee80211_var.h>
49 #include <netproto/802_11/ieee80211_input.h>
50 #include <netproto/802_11/ieee80211_phy.h>
51 #include <netproto/802_11/ieee80211_superg.h>
54 * Atheros fast-frame encapsulation format.
56 * 802.2 + FFHDR + HPAD + 802.3 + 802.2 + 1500 + SPAD + 802.3 + 802.2 + 1500:
57 * 8 + 4 + 4 + 14 + 8 + 1500 + 6 + 14 + 8 + 1500
60 /* fast frame header is 32-bits */
61 #define ATH_FF_PROTO 0x0000003f /* protocol */
62 #define ATH_FF_PROTO_S 0
63 #define ATH_FF_FTYPE 0x000000c0 /* frame type */
64 #define ATH_FF_FTYPE_S 6
65 #define ATH_FF_HLEN32 0x00000300 /* optional hdr length */
66 #define ATH_FF_HLEN32_S 8
67 #define ATH_FF_SEQNUM 0x001ffc00 /* sequence number */
68 #define ATH_FF_SEQNUM_S 10
69 #define ATH_FF_OFFSET 0xffe00000 /* offset to 2nd payload */
70 #define ATH_FF_OFFSET_S 21
72 #define ATH_FF_MAX_HDR_PAD 4
73 #define ATH_FF_MAX_SEP_PAD 6
74 #define ATH_FF_MAX_HDR 30
76 #define ATH_FF_PROTO_L2TUNNEL 0 /* L2 tunnel protocol */
77 #define ATH_FF_ETH_TYPE 0x88bd /* Ether type for encapsulated frames */
78 #define ATH_FF_SNAP_ORGCODE_0 0x00
79 #define ATH_FF_SNAP_ORGCODE_1 0x03
80 #define ATH_FF_SNAP_ORGCODE_2 0x7f
82 #define ATH_FF_TXQMIN 2 /* min txq depth for staging */
83 #define ATH_FF_TXQMAX 50 /* maximum # of queued frames allowed */
84 #define ATH_FF_STAGEMAX 5 /* max waiting period for staged frame*/
86 #define ETHER_HEADER_COPY(dst, src) \
87 memcpy(dst, src, sizeof(struct ether_header))
89 static int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
90 SYSCTL_INT(_net_wlan, OID_AUTO, ffppsmin, CTLFLAG_RW,
91 &ieee80211_ffppsmin, 0, "min packet rate before fast-frame staging");
92 static int ieee80211_ffagemax = -1; /* max time frames held on stage q */
93 SYSCTL_PROC(_net_wlan, OID_AUTO, ffagemax, CTLTYPE_INT | CTLFLAG_RW,
94 &ieee80211_ffagemax, 0, ieee80211_sysctl_msecs_ticks, "I",
95 "max hold time for fast-frame staging (ms)");
98 ieee80211_superg_attach(struct ieee80211com *ic)
100 struct ieee80211_superg *sg;
102 if (ic->ic_caps & IEEE80211_C_FF) {
103 sg = (struct ieee80211_superg *) kmalloc(
104 sizeof(struct ieee80211_superg), M_80211_VAP,
107 kprintf("%s: cannot allocate SuperG state block\n",
113 ieee80211_ffagemax = msecs_to_ticks(150);
117 ieee80211_superg_detach(struct ieee80211com *ic)
119 if (ic->ic_superg != NULL) {
120 kfree(ic->ic_superg, M_80211_VAP);
121 ic->ic_superg = NULL;
126 ieee80211_superg_vattach(struct ieee80211vap *vap)
128 struct ieee80211com *ic = vap->iv_ic;
130 if (ic->ic_superg == NULL) /* NB: can't do fast-frames w/o state */
131 vap->iv_caps &= ~IEEE80211_C_FF;
132 if (vap->iv_caps & IEEE80211_C_FF)
133 vap->iv_flags |= IEEE80211_F_FF;
134 /* NB: we only implement sta mode */
135 if (vap->iv_opmode == IEEE80211_M_STA &&
136 (vap->iv_caps & IEEE80211_C_TURBOP))
137 vap->iv_flags |= IEEE80211_F_TURBOP;
141 ieee80211_superg_vdetach(struct ieee80211vap *vap)
145 #define ATH_OUI_BYTES 0x00, 0x03, 0x7f
147 * Add a WME information element to a frame.
150 ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
152 static const struct ieee80211_ath_ie info = {
153 .ath_id = IEEE80211_ELEMID_VENDOR,
154 .ath_len = sizeof(struct ieee80211_ath_ie) - 2,
155 .ath_oui = { ATH_OUI_BYTES },
156 .ath_oui_type = ATH_OUI_TYPE,
157 .ath_oui_subtype= ATH_OUI_SUBTYPE,
158 .ath_version = ATH_OUI_VERSION,
160 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
162 memcpy(frm, &info, sizeof(info));
163 ath->ath_capability = caps;
164 if (defkeyix != IEEE80211_KEYIX_NONE) {
165 ath->ath_defkeyix[0] = (defkeyix & 0xff);
166 ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
168 ath->ath_defkeyix[0] = 0xff;
169 ath->ath_defkeyix[1] = 0x7f;
171 return frm + sizeof(info);
176 ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
178 const struct ieee80211vap *vap = bss->ni_vap;
180 return ieee80211_add_ath(frm,
181 vap->iv_flags & IEEE80211_F_ATHEROS,
182 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
183 bss->ni_authmode != IEEE80211_AUTH_8021X) ?
184 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
188 ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
190 const struct ieee80211_ath_ie *ath =
191 (const struct ieee80211_ath_ie *) ie;
193 ni->ni_ath_flags = ath->ath_capability;
194 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
198 ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
199 const struct ieee80211_frame *wh)
201 struct ieee80211vap *vap = ni->ni_vap;
202 const struct ieee80211_ath_ie *ath;
207 if (len < sizeof(struct ieee80211_ath_ie)-2) {
208 IEEE80211_DISCARD_IE(vap,
209 IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
210 wh, "Atheros", "too short, len %u", len);
213 ath = (const struct ieee80211_ath_ie *)frm;
214 capschanged = (ni->ni_ath_flags != ath->ath_capability);
215 defkeyix = LE_READ_2(ath->ath_defkeyix);
216 if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
217 ni->ni_ath_flags = ath->ath_capability;
218 ni->ni_ath_defkeyix = defkeyix;
219 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
220 "ath ie change: new caps 0x%x defkeyix 0x%x",
221 ni->ni_ath_flags, ni->ni_ath_defkeyix);
223 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
224 uint16_t curflags, newflags;
227 * Check for turbo mode switch. Calculate flags
228 * for the new mode and effect the switch.
230 newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
231 /* NB: BOOST is not in ic_flags, so get it from the ie */
232 if (ath->ath_capability & ATHEROS_CAP_BOOST)
233 newflags |= IEEE80211_CHAN_TURBO;
235 newflags &= ~IEEE80211_CHAN_TURBO;
236 if (newflags != curflags)
237 ieee80211_dturbo_switch(vap, newflags);
243 * Decap the encapsulated frame pair and dispatch the first
244 * for delivery. The second frame is returned for delivery
245 * via the normal path.
248 ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
250 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
251 #define MS(x,f) (((x) & f) >> f##_S)
252 struct ieee80211vap *vap = ni->ni_vap;
258 /* NB: we assume caller does this check for us */
259 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
260 ("ff not negotiated"));
262 * Check for fast-frame tunnel encapsulation.
264 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
266 if (m->m_len < FF_LLC_SIZE &&
267 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
268 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
269 ni->ni_macaddr, "fast-frame",
270 "%s", "m_pullup(llc) failed");
271 vap->iv_stats.is_rx_tooshort++;
274 llc = (struct llc *)(mtod(m, uint8_t *) +
275 sizeof(struct ether_header));
276 if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
278 m_adj(m, FF_LLC_SIZE);
279 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
280 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
281 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
282 ni->ni_macaddr, "fast-frame",
283 "unsupport tunnel protocol, header 0x%x", ath);
284 vap->iv_stats.is_ff_badhdr++;
288 /* NB: skip header and alignment padding */
289 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
291 vap->iv_stats.is_ff_decap++;
294 * Decap the first frame, bust it apart from the
295 * second and deliver; then decap the second frame
296 * and return it to the caller for normal delivery.
298 m = ieee80211_decap1(m, &framelen);
300 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
301 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
302 vap->iv_stats.is_ff_tooshort++;
305 n = m_split(m, framelen, M_NOWAIT);
307 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
308 ni->ni_macaddr, "fast-frame",
309 "%s", "unable to split encapsulated frames");
310 vap->iv_stats.is_ff_split++;
311 m_freem(m); /* NB: must reclaim */
314 /* XXX not right for WDS */
315 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
318 * Decap second frame.
320 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
321 n = ieee80211_decap1(n, &framelen);
323 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
324 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
325 vap->iv_stats.is_ff_tooshort++;
327 /* XXX verify framelen against mbuf contents */
328 return n; /* 2nd delivered by caller */
334 * Fast frame encapsulation. There must be two packets
335 * chained with m_nextpkt. We do header adjustment for
336 * each, add the tunnel encapsulation, and then concatenate
337 * the mbuf chains to form a single frame for transmission.
340 ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
341 struct ieee80211_key *key)
344 struct ether_header eh1, eh2;
351 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
352 "%s: only one frame\n", __func__);
355 m1->m_nextpkt = NULL;
357 * Include fast frame headers in adjusting header layout.
359 KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!"));
360 ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t));
361 m1 = ieee80211_mbuf_adjust(vap,
362 hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
363 sizeof(struct ether_header),
366 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
372 * Copy second frame's Ethernet header out of line
373 * and adjust for encapsulation headers. Note that
374 * we make room for padding in case there isn't room
375 * at the end of first frame.
377 KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
378 ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
379 m2 = ieee80211_mbuf_adjust(vap,
380 ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
383 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
388 * Now do tunnel encapsulation. First, each
389 * frame gets a standard encapsulation.
391 m1 = ieee80211_ff_encap1(vap, m1, &eh1);
394 m2 = ieee80211_ff_encap1(vap, m2, &eh2);
399 * Pad leading frame to a 4-byte boundary. If there
400 * is space at the end of the first frame, put it
401 * there; otherwise prepend to the front of the second
402 * frame. We know doing the second will always work
403 * because we reserve space above. We prefer appending
404 * as this typically has better DMA alignment properties.
406 for (m = m1; m->m_next != NULL; m = m->m_next)
408 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
410 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
413 m2->m_pkthdr.len += pad;
414 } else { /* append to first */
416 m1->m_pkthdr.len += pad;
421 * Now, stick 'em together and prepend the tunnel headers;
422 * first the Atheros tunnel header (all zero for now) and
423 * then a special fast frame LLC.
425 * XXX optimize by prepending together
427 m->m_next = m2; /* NB: last mbuf from above */
428 m1->m_pkthdr.len += m2->m_pkthdr.len;
429 M_PREPEND(m1, sizeof(uint32_t)+2, M_NOWAIT);
430 if (m1 == NULL) { /* XXX cannot happen */
431 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
432 "%s: no space for tunnel header\n", __func__);
433 vap->iv_stats.is_tx_nobuf++;
436 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
438 M_PREPEND(m1, sizeof(struct llc), M_NOWAIT);
439 if (m1 == NULL) { /* XXX cannot happen */
440 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
441 "%s: no space for llc header\n", __func__);
442 vap->iv_stats.is_tx_nobuf++;
445 llc = mtod(m1, struct llc *);
446 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
447 llc->llc_control = LLC_UI;
448 llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
449 llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
450 llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
451 llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
453 vap->iv_stats.is_ff_encap++;
465 ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
467 struct ieee80211vap *vap = ni->ni_vap;
468 struct ieee80211com *ic = ni->ni_ic;
471 IEEE80211_TX_LOCK_ASSERT(vap->iv_ic);
474 m = ieee80211_encap(vap, ni, m);
476 struct ifnet *ifp = vap->iv_ifp;
478 error = ieee80211_parent_xmitpkt(ic, m);;
480 /* NB: IFQ_HANDOFF reclaims mbuf */
481 ieee80211_free_node(ni);
483 IFNET_STAT_INC(ifp, opackets, 1);
486 ieee80211_free_node(ni);
490 * Flush frames to device; note we re-use the linked list
491 * the frames were stored on and use the sentinel (unchanged)
492 * which may be non-NULL.
495 ff_flush(struct mbuf *head, struct mbuf *last)
497 struct mbuf *m, *next;
498 struct ieee80211_node *ni;
499 struct ieee80211vap *vap;
501 for (m = head; m != last; m = next) {
505 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
508 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
509 "%s: flush frame, age %u", __func__, M_AGE_GET(m));
510 vap->iv_stats.is_ff_flush++;
517 * Age frames on the staging queue.
519 * This is called without the comlock held, but it does all its work
520 * behind the comlock. Because of this, it's possible that the
521 * staging queue will be serviced between the function which called
522 * it and now; thus simply checking that the queue has work in it
525 * See PR kern/174283 for more details.
528 ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
531 struct mbuf *m, *head;
532 struct ieee80211_node *ni;
533 struct ieee80211_tx_ampdu *tap;
536 KASSERT(sq->head != NULL, ("stageq empty"));
541 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
542 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
544 /* clear tap ref to frame */
545 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
546 tap = &ni->ni_tx_ampdu[tid];
547 KASSERT(tap->txa_private == m, ("staging queue empty"));
548 tap->txa_private = NULL;
550 sq->head = m->m_nextpkt;
556 M_AGE_SUB(m, quanta);
557 IEEE80211_UNLOCK(ic);
559 IEEE80211_TX_LOCK(ic);
561 IEEE80211_TX_UNLOCK(ic);
565 stageq_add(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *m)
567 int age = ieee80211_ffagemax;
569 IEEE80211_LOCK_ASSERT(ic);
571 if (sq->tail != NULL) {
572 sq->tail->m_nextpkt = m;
573 age -= M_AGE_GET(sq->head);
576 KASSERT(age >= 0, ("age %d", age));
584 stageq_remove(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *mstaged)
586 struct mbuf *m, *mprev;
588 IEEE80211_LOCK_ASSERT(ic);
591 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
594 sq->head = m->m_nextpkt;
596 mprev->m_nextpkt = m->m_nextpkt;
604 kprintf("%s: packet not found\n", __func__);
608 ff_approx_txtime(struct ieee80211_node *ni,
609 const struct mbuf *m1, const struct mbuf *m2)
611 struct ieee80211com *ic = ni->ni_ic;
612 struct ieee80211vap *vap = ni->ni_vap;
616 * Approximate the frame length to be transmitted. A swag to add
617 * the following maximal values to the skb payload:
618 * - 32: 802.11 encap + CRC
619 * - 24: encryption overhead (if wep bit)
620 * - 4 + 6: fast-frame header and padding
621 * - 16: 2 LLC FF tunnel headers
622 * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd)
624 framelen = m1->m_pkthdr.len + 32 +
625 ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR;
626 if (vap->iv_flags & IEEE80211_F_PRIVACY)
629 framelen += m2->m_pkthdr.len;
630 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
634 * Check if the supplied frame can be partnered with an existing
635 * or pending frame. Return a reference to any frame that should be
636 * sent on return; otherwise return NULL.
639 ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
641 struct ieee80211vap *vap = ni->ni_vap;
642 struct ieee80211com *ic = ni->ni_ic;
643 struct ieee80211_superg *sg = ic->ic_superg;
644 const int pri = M_WME_GETAC(m);
645 struct ieee80211_stageq *sq;
646 struct ieee80211_tx_ampdu *tap;
647 struct mbuf *mstaged;
648 uint32_t txtime, limit;
650 IEEE80211_TX_UNLOCK_ASSERT(ic);
653 * Check if the supplied frame can be aggregated.
655 * NB: we allow EAPOL frames to be aggregated with other ucast traffic.
656 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't
657 * be aggregated with other types of frames when encryption is on?
660 tap = &ni->ni_tx_ampdu[WME_AC_TO_TID(pri)];
661 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
662 ieee80211_txampdu_count_packet(tap);
665 * When not in station mode never aggregate a multicast
666 * frame; this insures, for example, that a combined frame
667 * does not require multiple encryption keys.
669 if (vap->iv_opmode != IEEE80211_M_STA &&
670 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
671 /* XXX flush staged frame? */
672 IEEE80211_UNLOCK(ic);
676 * If there is no frame to combine with and the pps is
677 * too low; then do not attempt to aggregate this frame.
679 if (mstaged == NULL &&
680 ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) {
681 IEEE80211_UNLOCK(ic);
684 sq = &sg->ff_stageq[pri];
686 * Check the txop limit to insure the aggregate fits.
688 limit = IEEE80211_TXOP_TO_US(
689 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
691 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
693 * Aggregate too long, return to the caller for direct
694 * transmission. In addition, flush any pending frame
695 * before sending this one.
697 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
698 "%s: txtime %u exceeds txop limit %u\n",
699 __func__, txtime, limit);
701 tap->txa_private = NULL;
703 stageq_remove(ic, sq, mstaged);
704 IEEE80211_UNLOCK(ic);
706 if (mstaged != NULL) {
707 IEEE80211_TX_LOCK(ic);
708 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
709 "%s: flush staged frame", __func__);
711 ff_transmit(ni, mstaged);
712 IEEE80211_TX_UNLOCK(ic);
714 return m; /* NB: original frame */
717 * An aggregation candidate. If there's a frame to partner
718 * with then combine and return for processing. Otherwise
719 * save this frame and wait for a partner to show up (or
720 * the frame to be flushed). Note that staged frames also
721 * hold their node reference.
723 if (mstaged != NULL) {
724 tap->txa_private = NULL;
725 stageq_remove(ic, sq, mstaged);
726 IEEE80211_UNLOCK(ic);
728 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
729 "%s: aggregate fast-frame", __func__);
731 * Release the node reference; we only need
732 * the one already in mstaged.
734 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
735 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
736 ieee80211_free_node(ni);
739 mstaged->m_nextpkt = m;
740 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
742 KASSERT(tap->txa_private == NULL,
743 ("txa_private %p", tap->txa_private));
744 tap->txa_private = m;
746 stageq_add(ic, sq, m);
747 IEEE80211_UNLOCK(ic);
749 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
750 "%s: stage frame, %u queued", __func__, sq->depth);
751 /* NB: mstaged is NULL */
757 ieee80211_ff_node_init(struct ieee80211_node *ni)
760 * Clean FF state on re-associate. This handles the case
761 * where a station leaves w/o notifying us and then returns
762 * before node is reaped for inactivity.
764 ieee80211_ff_node_cleanup(ni);
768 ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
770 struct ieee80211com *ic = ni->ni_ic;
771 struct ieee80211_superg *sg = ic->ic_superg;
772 struct ieee80211_tx_ampdu *tap;
773 struct mbuf *m, *next_m, *head;
778 for (tid = 0; tid < WME_NUM_TID; tid++) {
779 int ac = TID_TO_WME_AC(tid);
781 tap = &ni->ni_tx_ampdu[tid];
782 m = tap->txa_private;
784 tap->txa_private = NULL;
785 stageq_remove(ic, &sg->ff_stageq[ac], m);
790 IEEE80211_UNLOCK(ic);
793 * Free mbufs, taking care to not dereference the mbuf after
794 * we free it (hence grabbing m_nextpkt before we free it.)
798 next_m = m->m_nextpkt;
800 ieee80211_free_node(ni);
806 * Switch between turbo and non-turbo operating modes.
807 * Use the specified channel flags to locate the new
808 * channel, update 802.11 state, and then call back into
809 * the driver to effect the change.
812 ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
814 struct ieee80211com *ic = vap->iv_ic;
815 struct ieee80211_channel *chan;
817 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
818 if (chan == NULL) { /* XXX should not happen */
819 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
820 "%s: no channel with freq %u flags 0x%x\n",
821 __func__, ic->ic_bsschan->ic_freq, newflags);
825 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
826 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
827 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
828 ieee80211_phymode_name[ieee80211_chan2mode(chan)],
829 chan->ic_freq, chan->ic_flags);
831 ic->ic_bsschan = chan;
832 ic->ic_prevchan = ic->ic_curchan;
833 ic->ic_curchan = chan;
834 ic->ic_rt = ieee80211_get_ratetable(chan);
835 ic->ic_set_channel(ic);
836 ieee80211_radiotap_chan_change(ic);
837 /* NB: do not need to reset ERP state 'cuz we're in sta mode */
841 * Return the current ``state'' of an Atheros capbility.
842 * If associated in station mode report the negotiated
843 * setting. Otherwise report the current setting.
846 getathcap(struct ieee80211vap *vap, int cap)
848 if (vap->iv_opmode == IEEE80211_M_STA &&
849 vap->iv_state == IEEE80211_S_RUN)
850 return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
852 return (vap->iv_flags & cap) != 0;
856 superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
858 switch (ireq->i_type) {
859 case IEEE80211_IOC_FF:
860 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
862 case IEEE80211_IOC_TURBOP:
863 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
870 IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
873 superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
875 switch (ireq->i_type) {
876 case IEEE80211_IOC_FF:
878 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
880 vap->iv_flags |= IEEE80211_F_FF;
882 vap->iv_flags &= ~IEEE80211_F_FF;
884 case IEEE80211_IOC_TURBOP:
886 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
888 vap->iv_flags |= IEEE80211_F_TURBOP;
890 vap->iv_flags &= ~IEEE80211_F_TURBOP;
897 IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);
899 #endif /* IEEE80211_SUPPORT_SUPERG */