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.
25 * $FreeBSD: head/sys/net80211/ieee80211_superg.c 193115 2009-05-30 20:11:23Z sam $
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/endian.h>
36 #include <sys/socket.h>
39 #include <net/ethernet.h>
40 #include <net/route.h>
42 #include <net/if_llc.h>
43 #include <net/if_media.h>
45 #include <netproto/802_11/ieee80211_var.h>
46 #include <netproto/802_11/ieee80211_input.h>
47 #include <netproto/802_11/ieee80211_phy.h>
48 #include <netproto/802_11/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 static int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
87 SYSCTL_INT(_net_wlan, OID_AUTO, ffppsmin, CTLTYPE_INT | CTLFLAG_RW,
88 &ieee80211_ffppsmin, 0, "min packet rate before fast-frame staging");
89 static int ieee80211_ffagemax = -1; /* max time frames held on stage q */
90 SYSCTL_PROC(_net_wlan, OID_AUTO, ffagemax, CTLTYPE_INT | CTLFLAG_RW,
91 &ieee80211_ffagemax, 0, ieee80211_sysctl_msecs_ticks, "I",
92 "max hold time for fast-frame staging (ms)");
95 ieee80211_superg_attach(struct ieee80211com *ic)
97 struct ieee80211_superg *sg;
99 if (ic->ic_caps & IEEE80211_C_FF) {
100 sg = (struct ieee80211_superg *) kmalloc(
101 sizeof(struct ieee80211_superg), M_80211_VAP,
104 kprintf("%s: cannot allocate SuperG state block\n",
110 ieee80211_ffagemax = msecs_to_ticks(150);
114 ieee80211_superg_detach(struct ieee80211com *ic)
116 if (ic->ic_superg != NULL) {
117 kfree(ic->ic_superg, M_80211_VAP);
118 ic->ic_superg = NULL;
123 ieee80211_superg_vattach(struct ieee80211vap *vap)
125 struct ieee80211com *ic = vap->iv_ic;
127 if (ic->ic_superg == NULL) /* NB: can't do fast-frames w/o state */
128 vap->iv_caps &= ~IEEE80211_C_FF;
129 if (vap->iv_caps & IEEE80211_C_FF)
130 vap->iv_flags |= IEEE80211_F_FF;
131 /* NB: we only implement sta mode */
132 if (vap->iv_opmode == IEEE80211_M_STA &&
133 (vap->iv_caps & IEEE80211_C_TURBOP))
134 vap->iv_flags |= IEEE80211_F_TURBOP;
138 ieee80211_superg_vdetach(struct ieee80211vap *vap)
142 #define ATH_OUI_BYTES 0x00, 0x03, 0x7f
144 * Add a WME information element to a frame.
147 ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
149 static const struct ieee80211_ath_ie info = {
150 .ath_id = IEEE80211_ELEMID_VENDOR,
151 .ath_len = sizeof(struct ieee80211_ath_ie) - 2,
152 .ath_oui = { ATH_OUI_BYTES },
153 .ath_oui_type = ATH_OUI_TYPE,
154 .ath_oui_subtype= ATH_OUI_SUBTYPE,
155 .ath_version = ATH_OUI_VERSION,
157 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
159 memcpy(frm, &info, sizeof(info));
160 ath->ath_capability = caps;
161 if (defkeyix != IEEE80211_KEYIX_NONE) {
162 ath->ath_defkeyix[0] = (defkeyix & 0xff);
163 ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff);
165 ath->ath_defkeyix[0] = 0xff;
166 ath->ath_defkeyix[1] = 0x7f;
168 return frm + sizeof(info);
173 ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
175 const struct ieee80211vap *vap = bss->ni_vap;
177 return ieee80211_add_ath(frm,
178 vap->iv_flags & IEEE80211_F_ATHEROS,
179 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
180 bss->ni_authmode != IEEE80211_AUTH_8021X) ?
181 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
185 ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
187 const struct ieee80211_ath_ie *ath =
188 (const struct ieee80211_ath_ie *) ie;
190 ni->ni_ath_flags = ath->ath_capability;
191 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
195 ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
196 const struct ieee80211_frame *wh)
198 struct ieee80211vap *vap = ni->ni_vap;
199 const struct ieee80211_ath_ie *ath;
204 if (len < sizeof(struct ieee80211_ath_ie)-2) {
205 IEEE80211_DISCARD_IE(vap,
206 IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG,
207 wh, "Atheros", "too short, len %u", len);
210 ath = (const struct ieee80211_ath_ie *)frm;
211 capschanged = (ni->ni_ath_flags != ath->ath_capability);
212 defkeyix = LE_READ_2(ath->ath_defkeyix);
213 if (capschanged || defkeyix != ni->ni_ath_defkeyix) {
214 ni->ni_ath_flags = ath->ath_capability;
215 ni->ni_ath_defkeyix = defkeyix;
216 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
217 "ath ie change: new caps 0x%x defkeyix 0x%x",
218 ni->ni_ath_flags, ni->ni_ath_defkeyix);
220 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
221 uint16_t curflags, newflags;
224 * Check for turbo mode switch. Calculate flags
225 * for the new mode and effect the switch.
227 newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags;
228 /* NB: BOOST is not in ic_flags, so get it from the ie */
229 if (ath->ath_capability & ATHEROS_CAP_BOOST)
230 newflags |= IEEE80211_CHAN_TURBO;
232 newflags &= ~IEEE80211_CHAN_TURBO;
233 if (newflags != curflags)
234 ieee80211_dturbo_switch(vap, newflags);
240 * Decap the encapsulated frame pair and dispatch the first
241 * for delivery. The second frame is returned for delivery
242 * via the normal path.
245 ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
247 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
248 #define MS(x,f) (((x) & f) >> f##_S)
249 struct ieee80211vap *vap = ni->ni_vap;
255 /* NB: we assume caller does this check for us */
256 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
257 ("ff not negotiated"));
259 * Check for fast-frame tunnel encapsulation.
261 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
263 if (m->m_len < FF_LLC_SIZE &&
264 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
265 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
266 ni->ni_macaddr, "fast-frame",
267 "%s", "m_pullup(llc) failed");
268 vap->iv_stats.is_rx_tooshort++;
271 llc = (struct llc *)(mtod(m, uint8_t *) +
272 sizeof(struct ether_header));
273 if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
275 m_adj(m, FF_LLC_SIZE);
276 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
277 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
278 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
279 ni->ni_macaddr, "fast-frame",
280 "unsupport tunnel protocol, header 0x%x", ath);
281 vap->iv_stats.is_ff_badhdr++;
285 /* NB: skip header and alignment padding */
286 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
288 vap->iv_stats.is_ff_decap++;
291 * Decap the first frame, bust it apart from the
292 * second and deliver; then decap the second frame
293 * and return it to the caller for normal delivery.
295 m = ieee80211_decap1(m, &framelen);
297 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
298 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
299 vap->iv_stats.is_ff_tooshort++;
302 n = m_split(m, framelen, MB_DONTWAIT);
304 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
305 ni->ni_macaddr, "fast-frame",
306 "%s", "unable to split encapsulated frames");
307 vap->iv_stats.is_ff_split++;
308 m_freem(m); /* NB: must reclaim */
311 /* XXX not right for WDS */
312 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
315 * Decap second frame.
317 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
318 n = ieee80211_decap1(n, &framelen);
320 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
321 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
322 vap->iv_stats.is_ff_tooshort++;
324 /* XXX verify framelen against mbuf contents */
325 return n; /* 2nd delivered by caller */
331 * Do Ethernet-LLC encapsulation for each payload in a fast frame
332 * tunnel encapsulation. The frame is assumed to have an Ethernet
333 * header at the front that must be stripped before prepending the
334 * LLC followed by the Ethernet header passed in (with an Ethernet
335 * type that specifies the payload size).
338 ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
339 const struct ether_header *eh)
344 /* XXX optimize by combining m_adj+M_PREPEND */
345 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
346 llc = mtod(m, struct llc *);
347 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
348 llc->llc_control = LLC_UI;
349 llc->llc_snap.org_code[0] = 0;
350 llc->llc_snap.org_code[1] = 0;
351 llc->llc_snap.org_code[2] = 0;
352 llc->llc_snap.ether_type = eh->ether_type;
353 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
355 M_PREPEND(m, sizeof(struct ether_header), MB_DONTWAIT);
356 if (m == NULL) { /* XXX cannot happen */
357 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
358 "%s: no space for ether_header\n", __func__);
359 vap->iv_stats.is_tx_nobuf++;
362 ETHER_HEADER_COPY(mtod(m, void *), eh);
363 mtod(m, struct ether_header *)->ether_type = htons(payload);
368 * Fast frame encapsulation. There must be two packets
369 * chained with m_nextpkt. We do header adjustment for
370 * each, add the tunnel encapsulation, and then concatenate
371 * the mbuf chains to form a single frame for transmission.
374 ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
375 struct ieee80211_key *key)
378 struct ether_header eh1, eh2;
385 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
386 "%s: only one frame\n", __func__);
389 m1->m_nextpkt = NULL;
391 * Include fast frame headers in adjusting header layout.
393 KASSERT(m1->m_len >= sizeof(eh1), ("no ethernet header!"));
394 ETHER_HEADER_COPY(&eh1, mtod(m1, caddr_t));
395 m1 = ieee80211_mbuf_adjust(vap,
396 hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 +
397 sizeof(struct ether_header),
400 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
406 * Copy second frame's Ethernet header out of line
407 * and adjust for encapsulation headers. Note that
408 * we make room for padding in case there isn't room
409 * at the end of first frame.
411 KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!"));
412 ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t));
413 m2 = ieee80211_mbuf_adjust(vap,
414 ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header),
417 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
422 * Now do tunnel encapsulation. First, each
423 * frame gets a standard encapsulation.
425 m1 = ff_encap1(vap, m1, &eh1);
428 m2 = ff_encap1(vap, m2, &eh2);
433 * Pad leading frame to a 4-byte boundary. If there
434 * is space at the end of the first frame, put it
435 * there; otherwise prepend to the front of the second
436 * frame. We know doing the second will always work
437 * because we reserve space above. We prefer appending
438 * as this typically has better DMA alignment properties.
440 for (m = m1; m->m_next != NULL; m = m->m_next)
442 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
444 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
447 m2->m_pkthdr.len += pad;
448 } else { /* append to first */
450 m1->m_pkthdr.len += pad;
455 * Now, stick 'em together and prepend the tunnel headers;
456 * first the Atheros tunnel header (all zero for now) and
457 * then a special fast frame LLC.
459 * XXX optimize by prepending together
461 m->m_next = m2; /* NB: last mbuf from above */
462 m1->m_pkthdr.len += m2->m_pkthdr.len;
463 M_PREPEND(m1, sizeof(uint32_t)+2, MB_DONTWAIT);
464 if (m1 == NULL) { /* XXX cannot happen */
465 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
466 "%s: no space for tunnel header\n", __func__);
467 vap->iv_stats.is_tx_nobuf++;
470 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
472 M_PREPEND(m1, sizeof(struct llc), MB_DONTWAIT);
473 if (m1 == NULL) { /* XXX cannot happen */
474 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
475 "%s: no space for llc header\n", __func__);
476 vap->iv_stats.is_tx_nobuf++;
479 llc = mtod(m1, struct llc *);
480 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
481 llc->llc_control = LLC_UI;
482 llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0;
483 llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1;
484 llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2;
485 llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE);
487 vap->iv_stats.is_ff_encap++;
499 ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
501 struct ieee80211vap *vap = ni->ni_vap;
505 m = ieee80211_encap(vap, ni, m);
507 struct ifnet *ifp = vap->iv_ifp;
508 struct ifnet *parent = ni->ni_ic->ic_ifp;
510 error = ieee80211_handoff(parent, m);
512 /* NB: IFQ_HANDOFF reclaims mbuf */
513 ieee80211_free_node(ni);
515 IFNET_STAT_INC(ifp, opackets, 1);
518 ieee80211_free_node(ni);
522 * Flush frames to device; note we re-use the linked list
523 * the frames were stored on and use the sentinel (unchanged)
524 * which may be non-NULL.
527 ff_flush(struct mbuf *head, struct mbuf *last)
529 struct mbuf *m, *next;
530 struct ieee80211_node *ni;
531 struct ieee80211vap *vap;
533 for (m = head; m != last; m = next) {
537 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
540 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
541 "%s: flush frame, age %u", __func__, M_AGE_GET(m));
542 vap->iv_stats.is_ff_flush++;
549 * Age frames on the staging queue.
552 ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
555 struct ieee80211_superg *sg = ic->ic_superg;
556 struct mbuf *m, *head;
557 struct ieee80211_node *ni;
558 struct ieee80211_tx_ampdu *tap;
560 KASSERT(sq->head != NULL, ("stageq empty"));
563 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
564 /* clear tap ref to frame */
565 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
566 tap = &ni->ni_tx_ampdu[M_WME_GETAC(m)];
567 KASSERT(tap->txa_private == m, ("staging queue empty"));
568 tap->txa_private = NULL;
570 sq->head = m->m_nextpkt;
572 sg->ff_stageqdepth--;
577 M_AGE_SUB(m, quanta);
583 stageq_add(struct ieee80211_stageq *sq, struct mbuf *m)
585 int age = ieee80211_ffagemax;
586 if (sq->tail != NULL) {
587 sq->tail->m_nextpkt = m;
588 age -= M_AGE_GET(sq->head);
591 KASSERT(age >= 0, ("age %d", age));
599 stageq_remove(struct ieee80211_stageq *sq, struct mbuf *mstaged)
601 struct mbuf *m, *mprev;
604 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
607 sq->head = m->m_nextpkt;
609 mprev->m_nextpkt = m->m_nextpkt;
617 kprintf("%s: packet not found\n", __func__);
621 ff_approx_txtime(struct ieee80211_node *ni,
622 const struct mbuf *m1, const struct mbuf *m2)
624 struct ieee80211com *ic = ni->ni_ic;
625 struct ieee80211vap *vap = ni->ni_vap;
629 * Approximate the frame length to be transmitted. A swag to add
630 * the following maximal values to the skb payload:
631 * - 32: 802.11 encap + CRC
632 * - 24: encryption overhead (if wep bit)
633 * - 4 + 6: fast-frame header and padding
634 * - 16: 2 LLC FF tunnel headers
635 * - 14: 1 802.3 FF tunnel header (mbuf already accounts for 2nd)
637 framelen = m1->m_pkthdr.len + 32 +
638 ATH_FF_MAX_HDR_PAD + ATH_FF_MAX_SEP_PAD + ATH_FF_MAX_HDR;
639 if (vap->iv_flags & IEEE80211_F_PRIVACY)
642 framelen += m2->m_pkthdr.len;
643 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
647 * Check if the supplied frame can be partnered with an existing
648 * or pending frame. Return a reference to any frame that should be
649 * sent on return; otherwise return NULL.
652 ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
654 struct ieee80211vap *vap = ni->ni_vap;
655 struct ieee80211com *ic = ni->ni_ic;
656 struct ieee80211_superg *sg = ic->ic_superg;
657 const int pri = M_WME_GETAC(m);
658 struct ieee80211_stageq *sq;
659 struct ieee80211_tx_ampdu *tap;
660 struct mbuf *mstaged;
661 uint32_t txtime, limit;
664 * Check if the supplied frame can be aggregated.
666 * NB: we allow EAPOL frames to be aggregated with other ucast traffic.
667 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't
668 * be aggregated with other types of frames when encryption is on?
670 tap = &ni->ni_tx_ampdu[pri];
671 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
672 ieee80211_txampdu_count_packet(tap);
675 * When not in station mode never aggregate a multicast
676 * frame; this insures, for example, that a combined frame
677 * does not require multiple encryption keys.
679 if (vap->iv_opmode != IEEE80211_M_STA &&
680 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
681 /* XXX flush staged frame? */
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) {
692 sq = &sg->ff_stageq[pri];
694 * Check the txop limit to insure the aggregate fits.
696 limit = IEEE80211_TXOP_TO_US(
697 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
699 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
701 * Aggregate too long, return to the caller for direct
702 * transmission. In addition, flush any pending frame
703 * before sending this one.
705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
706 "%s: txtime %u exceeds txop limit %u\n",
707 __func__, txtime, limit);
709 tap->txa_private = NULL;
711 stageq_remove(sq, mstaged);
713 if (mstaged != NULL) {
714 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
715 "%s: flush staged frame", __func__);
717 ff_transmit(ni, mstaged);
719 return m; /* NB: original frame */
722 * An aggregation candidate. If there's a frame to partner
723 * with then combine and return for processing. Otherwise
724 * save this frame and wait for a partner to show up (or
725 * the frame to be flushed). Note that staged frames also
726 * hold their node reference.
728 if (mstaged != NULL) {
729 tap->txa_private = NULL;
730 stageq_remove(sq, mstaged);
732 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
733 "%s: aggregate fast-frame", __func__);
735 * Release the node reference; we only need
736 * the one already in mstaged.
738 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
739 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
740 ieee80211_free_node(ni);
743 mstaged->m_nextpkt = m;
744 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
746 KASSERT(tap->txa_private == NULL,
747 ("txa_private %p", tap->txa_private));
748 tap->txa_private = m;
751 sg->ff_stageqdepth++;
753 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
754 "%s: stage frame, %u queued", __func__, sq->depth);
755 /* NB: mstaged is NULL */
761 ieee80211_ff_node_init(struct ieee80211_node *ni)
764 * Clean FF state on re-associate. This handles the case
765 * where a station leaves w/o notifying us and then returns
766 * before node is reaped for inactivity.
768 ieee80211_ff_node_cleanup(ni);
772 ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
774 struct ieee80211com *ic = ni->ni_ic;
775 struct ieee80211_superg *sg = ic->ic_superg;
776 struct ieee80211_tx_ampdu *tap;
777 struct mbuf *m, *head;
781 for (ac = 0; ac < WME_NUM_AC; ac++) {
782 tap = &ni->ni_tx_ampdu[ac];
783 m = tap->txa_private;
785 tap->txa_private = NULL;
786 stageq_remove(&sg->ff_stageq[ac], m);
792 for (m = head; m != NULL; m = m->m_nextpkt) {
794 ieee80211_free_node(ni);
799 * Switch between turbo and non-turbo operating modes.
800 * Use the specified channel flags to locate the new
801 * channel, update 802.11 state, and then call back into
802 * the driver to effect the change.
805 ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
807 struct ieee80211com *ic = vap->iv_ic;
808 struct ieee80211_channel *chan;
810 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
811 if (chan == NULL) { /* XXX should not happen */
812 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
813 "%s: no channel with freq %u flags 0x%x\n",
814 __func__, ic->ic_bsschan->ic_freq, newflags);
818 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
819 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
820 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
821 ieee80211_phymode_name[ieee80211_chan2mode(chan)],
822 chan->ic_freq, chan->ic_flags);
824 ic->ic_bsschan = chan;
825 ic->ic_prevchan = ic->ic_curchan;
826 ic->ic_curchan = chan;
827 ic->ic_rt = ieee80211_get_ratetable(chan);
828 ic->ic_set_channel(ic);
829 ieee80211_radiotap_chan_change(ic);
830 /* NB: do not need to reset ERP state 'cuz we're in sta mode */
834 * Return the current ``state'' of an Atheros capbility.
835 * If associated in station mode report the negotiated
836 * setting. Otherwise report the current setting.
839 getathcap(struct ieee80211vap *vap, int cap)
841 if (vap->iv_opmode == IEEE80211_M_STA &&
842 vap->iv_state == IEEE80211_S_RUN)
843 return IEEE80211_ATH_CAP(vap, vap->iv_bss, cap) != 0;
845 return (vap->iv_flags & cap) != 0;
849 superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
851 switch (ireq->i_type) {
852 case IEEE80211_IOC_FF:
853 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
855 case IEEE80211_IOC_TURBOP:
856 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
863 IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
866 superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
868 switch (ireq->i_type) {
869 case IEEE80211_IOC_FF:
871 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
873 vap->iv_flags |= IEEE80211_F_FF;
875 vap->iv_flags &= ~IEEE80211_F_FF;
877 case IEEE80211_IOC_TURBOP:
879 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
881 vap->iv_flags |= IEEE80211_F_TURBOP;
883 vap->iv_flags &= ~IEEE80211_F_TURBOP;
890 IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);