wlan - Update wlan from Adrian / FreeBSD
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_superg.c
CommitLineData
32176cfd
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1/*-
2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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.
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24 */
25
085ff963
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26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD$");
28
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29#include "opt_wlan.h"
30
085ff963
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31#ifdef IEEE80211_SUPPORT_SUPERG
32
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33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/mbuf.h>
36#include <sys/kernel.h>
37#include <sys/endian.h>
38
39#include <sys/socket.h>
40
32176cfd 41#include <net/if.h>
085ff963 42#include <net/if_var.h>
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43#include <net/if_llc.h>
44#include <net/if_media.h>
085ff963
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45#include <net/bpf.h>
46#include <net/ethernet.h>
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47
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>
52
53/*
54 * Atheros fast-frame encapsulation format.
55 * FF max payload:
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
58 * = 3066
59 */
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
71
72#define ATH_FF_MAX_HDR_PAD 4
73#define ATH_FF_MAX_SEP_PAD 6
74#define ATH_FF_MAX_HDR 30
75
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
81
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*/
85
86#define ETHER_HEADER_COPY(dst, src) \
87 memcpy(dst, src, sizeof(struct ether_header))
88
89static int ieee80211_ffppsmin = 2; /* pps threshold for ff aggregation */
085ff963 90SYSCTL_INT(_net_wlan, OID_AUTO, ffppsmin, CTLFLAG_RW,
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91 &ieee80211_ffppsmin, 0, "min packet rate before fast-frame staging");
92static int ieee80211_ffagemax = -1; /* max time frames held on stage q */
93SYSCTL_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)");
96
97void
98ieee80211_superg_attach(struct ieee80211com *ic)
99{
100 struct ieee80211_superg *sg;
101
102 if (ic->ic_caps & IEEE80211_C_FF) {
103 sg = (struct ieee80211_superg *) kmalloc(
104 sizeof(struct ieee80211_superg), M_80211_VAP,
fcaa651d 105 M_INTWAIT | M_ZERO);
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106 if (sg == NULL) {
107 kprintf("%s: cannot allocate SuperG state block\n",
108 __func__);
109 return;
110 }
111 ic->ic_superg = sg;
112 }
113 ieee80211_ffagemax = msecs_to_ticks(150);
114}
115
116void
117ieee80211_superg_detach(struct ieee80211com *ic)
118{
119 if (ic->ic_superg != NULL) {
120 kfree(ic->ic_superg, M_80211_VAP);
121 ic->ic_superg = NULL;
122 }
123}
124
125void
126ieee80211_superg_vattach(struct ieee80211vap *vap)
127{
128 struct ieee80211com *ic = vap->iv_ic;
129
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;
138}
139
140void
141ieee80211_superg_vdetach(struct ieee80211vap *vap)
142{
143}
144
145#define ATH_OUI_BYTES 0x00, 0x03, 0x7f
146/*
147 * Add a WME information element to a frame.
148 */
149uint8_t *
150ieee80211_add_ath(uint8_t *frm, uint8_t caps, ieee80211_keyix defkeyix)
151{
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,
159 };
160 struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm;
161
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);
167 } else {
168 ath->ath_defkeyix[0] = 0xff;
169 ath->ath_defkeyix[1] = 0x7f;
170 }
171 return frm + sizeof(info);
172}
173#undef ATH_OUI_BYTES
174
175uint8_t *
176ieee80211_add_athcaps(uint8_t *frm, const struct ieee80211_node *bss)
177{
178 const struct ieee80211vap *vap = bss->ni_vap;
179
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);
185}
186
187void
188ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
189{
190 const struct ieee80211_ath_ie *ath =
191 (const struct ieee80211_ath_ie *) ie;
192
193 ni->ni_ath_flags = ath->ath_capability;
194 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
195}
196
197int
198ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm,
199 const struct ieee80211_frame *wh)
200{
201 struct ieee80211vap *vap = ni->ni_vap;
202 const struct ieee80211_ath_ie *ath;
203 u_int len = frm[1];
204 int capschanged;
205 uint16_t defkeyix;
206
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);
211 return -1;
212 }
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);
222 }
223 if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) {
224 uint16_t curflags, newflags;
225
226 /*
227 * Check for turbo mode switch. Calculate flags
228 * for the new mode and effect the switch.
229 */
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;
234 else
235 newflags &= ~IEEE80211_CHAN_TURBO;
236 if (newflags != curflags)
237 ieee80211_dturbo_switch(vap, newflags);
238 }
239 return capschanged;
240}
241
242/*
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.
246 */
247struct mbuf *
248ieee80211_ff_decap(struct ieee80211_node *ni, struct mbuf *m)
249{
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;
253 struct llc *llc;
254 uint32_t ath;
255 struct mbuf *n;
256 int framelen;
257
258 /* NB: we assume caller does this check for us */
259 KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
260 ("ff not negotiated"));
261 /*
262 * Check for fast-frame tunnel encapsulation.
263 */
264 if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
265 return m;
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++;
272 return NULL;
273 }
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))
277 return m;
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++;
285 m_freem(m);
286 return NULL;
287 }
288 /* NB: skip header and alignment padding */
289 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
290
291 vap->iv_stats.is_ff_decap++;
292
293 /*
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.
297 */
298 m = ieee80211_decap1(m, &framelen);
299 if (m == NULL) {
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++;
303 return NULL;
304 }
543d1dec 305 n = m_split(m, framelen, MB_DONTWAIT);
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306 if (n == NULL) {
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 */
312 return NULL;
313 }
314 /* XXX not right for WDS */
315 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
316
317 /*
318 * Decap second frame.
319 */
320 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
321 n = ieee80211_decap1(n, &framelen);
322 if (n == NULL) {
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++;
326 }
327 /* XXX verify framelen against mbuf contents */
328 return n; /* 2nd delivered by caller */
329#undef MS
330#undef FF_LLC_SIZE
331}
332
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333/*
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.
338 */
339struct mbuf *
340ieee80211_ff_encap(struct ieee80211vap *vap, struct mbuf *m1, int hdrspace,
341 struct ieee80211_key *key)
342{
343 struct mbuf *m2;
344 struct ether_header eh1, eh2;
345 struct llc *llc;
346 struct mbuf *m;
347 int pad;
348
349 m2 = m1->m_nextpkt;
350 if (m2 == NULL) {
351 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
352 "%s: only one frame\n", __func__);
353 goto bad;
354 }
355 m1->m_nextpkt = NULL;
356 /*
357 * Include fast frame headers in adjusting header layout.
358 */
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),
364 key, m1);
365 if (m1 == NULL) {
366 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
367 m_freem(m2);
368 goto bad;
369 }
370
371 /*
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.
376 */
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),
381 NULL, m2);
382 if (m2 == NULL) {
383 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
384 goto bad;
385 }
386
387 /*
388 * Now do tunnel encapsulation. First, each
389 * frame gets a standard encapsulation.
390 */
085ff963 391 m1 = ieee80211_ff_encap1(vap, m1, &eh1);
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392 if (m1 == NULL)
393 goto bad;
085ff963 394 m2 = ieee80211_ff_encap1(vap, m2, &eh2);
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395 if (m2 == NULL)
396 goto bad;
397
398 /*
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.
405 */
406 for (m = m1; m->m_next != NULL; m = m->m_next)
407 ;
408 pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len;
409 if (pad) {
410 if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */
411 m2->m_data -= pad;
412 m2->m_len += pad;
413 m2->m_pkthdr.len += pad;
414 } else { /* append to first */
415 m->m_len += pad;
416 m1->m_pkthdr.len += pad;
417 }
418 }
419
420 /*
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.
424 *
425 * XXX optimize by prepending together
426 */
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, MB_DONTWAIT);
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++;
434 return NULL;
435 }
436 memset(mtod(m1, void *), 0, sizeof(uint32_t)+2);
437
438 M_PREPEND(m1, sizeof(struct llc), MB_DONTWAIT);
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++;
443 return NULL;
444 }
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);
452
453 vap->iv_stats.is_ff_encap++;
454
455 return m1;
456bad:
457 if (m1 != NULL)
458 m_freem(m1);
459 if (m2 != NULL)
460 m_freem(m2);
461 return NULL;
462}
463
464static void
465ff_transmit(struct ieee80211_node *ni, struct mbuf *m)
466{
467 struct ieee80211vap *vap = ni->ni_vap;
085ff963 468 struct ieee80211com *ic = ni->ni_ic;
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469 int error;
470
085ff963
MD
471 IEEE80211_TX_LOCK_ASSERT(vap->iv_ic);
472
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473 /* encap and xmit */
474 m = ieee80211_encap(vap, ni, m);
475 if (m != NULL) {
476 struct ifnet *ifp = vap->iv_ifp;
32176cfd 477
085ff963 478 error = ieee80211_parent_xmitpkt(ic, m);;
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479 if (error != 0) {
480 /* NB: IFQ_HANDOFF reclaims mbuf */
481 ieee80211_free_node(ni);
482 } else {
d40991ef 483 IFNET_STAT_INC(ifp, opackets, 1);
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484 }
485 } else
486 ieee80211_free_node(ni);
487}
488
489/*
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.
493 */
494static void
495ff_flush(struct mbuf *head, struct mbuf *last)
496{
497 struct mbuf *m, *next;
498 struct ieee80211_node *ni;
499 struct ieee80211vap *vap;
500
501 for (m = head; m != last; m = next) {
502 next = m->m_nextpkt;
503 m->m_nextpkt = NULL;
504
505 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
506 vap = ni->ni_vap;
507
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++;
511
512 ff_transmit(ni, m);
513 }
514}
515
516/*
517 * Age frames on the staging queue.
085ff963
MD
518 *
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
523 * may fail.
524 *
525 * See PR kern/174283 for more details.
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526 */
527void
528ieee80211_ff_age(struct ieee80211com *ic, struct ieee80211_stageq *sq,
529 int quanta)
530{
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531 struct mbuf *m, *head;
532 struct ieee80211_node *ni;
533 struct ieee80211_tx_ampdu *tap;
534
085ff963 535#if 0
32176cfd 536 KASSERT(sq->head != NULL, ("stageq empty"));
085ff963 537#endif
32176cfd 538
085ff963 539 IEEE80211_LOCK(ic);
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540 head = sq->head;
541 while ((m = sq->head) != NULL && M_AGE_GET(m) < quanta) {
085ff963
MD
542 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
543
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544 /* clear tap ref to frame */
545 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
085ff963 546 tap = &ni->ni_tx_ampdu[tid];
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547 KASSERT(tap->txa_private == m, ("staging queue empty"));
548 tap->txa_private = NULL;
549
550 sq->head = m->m_nextpkt;
551 sq->depth--;
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552 }
553 if (m == NULL)
554 sq->tail = NULL;
555 else
556 M_AGE_SUB(m, quanta);
085ff963 557 IEEE80211_UNLOCK(ic);
32176cfd 558
085ff963 559 IEEE80211_TX_LOCK(ic);
32176cfd 560 ff_flush(head, m);
085ff963 561 IEEE80211_TX_UNLOCK(ic);
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562}
563
564static void
085ff963 565stageq_add(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *m)
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566{
567 int age = ieee80211_ffagemax;
085ff963
MD
568
569 IEEE80211_LOCK_ASSERT(ic);
570
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571 if (sq->tail != NULL) {
572 sq->tail->m_nextpkt = m;
573 age -= M_AGE_GET(sq->head);
574 } else
575 sq->head = m;
576 KASSERT(age >= 0, ("age %d", age));
577 M_AGE_SET(m, age);
578 m->m_nextpkt = NULL;
579 sq->tail = m;
580 sq->depth++;
581}
582
583static void
085ff963 584stageq_remove(struct ieee80211com *ic, struct ieee80211_stageq *sq, struct mbuf *mstaged)
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585{
586 struct mbuf *m, *mprev;
587
085ff963
MD
588 IEEE80211_LOCK_ASSERT(ic);
589
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590 mprev = NULL;
591 for (m = sq->head; m != NULL; m = m->m_nextpkt) {
592 if (m == mstaged) {
593 if (mprev == NULL)
594 sq->head = m->m_nextpkt;
595 else
596 mprev->m_nextpkt = m->m_nextpkt;
597 if (sq->tail == m)
598 sq->tail = mprev;
599 sq->depth--;
600 return;
601 }
602 mprev = m;
603 }
604 kprintf("%s: packet not found\n", __func__);
605}
606
607static uint32_t
608ff_approx_txtime(struct ieee80211_node *ni,
609 const struct mbuf *m1, const struct mbuf *m2)
610{
611 struct ieee80211com *ic = ni->ni_ic;
612 struct ieee80211vap *vap = ni->ni_vap;
613 uint32_t framelen;
614
615 /*
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)
623 */
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)
627 framelen += 24;
628 if (m2 != NULL)
629 framelen += m2->m_pkthdr.len;
630 return ieee80211_compute_duration(ic->ic_rt, framelen, ni->ni_txrate, 0);
631}
632
633/*
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.
637 */
638struct mbuf *
639ieee80211_ff_check(struct ieee80211_node *ni, struct mbuf *m)
640{
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;
649
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650 IEEE80211_TX_UNLOCK_ASSERT(ic);
651
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652 /*
653 * Check if the supplied frame can be aggregated.
654 *
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?
658 */
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659 IEEE80211_LOCK(ic);
660 tap = &ni->ni_tx_ampdu[WME_AC_TO_TID(pri)];
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661 mstaged = tap->txa_private; /* NB: we reuse AMPDU state */
662 ieee80211_txampdu_count_packet(tap);
663
664 /*
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.
668 */
669 if (vap->iv_opmode != IEEE80211_M_STA &&
670 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) {
671 /* XXX flush staged frame? */
085ff963 672 IEEE80211_UNLOCK(ic);
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673 return m;
674 }
675 /*
676 * If there is no frame to combine with and the pps is
677 * too low; then do not attempt to aggregate this frame.
678 */
679 if (mstaged == NULL &&
680 ieee80211_txampdu_getpps(tap) < ieee80211_ffppsmin) {
085ff963 681 IEEE80211_UNLOCK(ic);
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682 return m;
683 }
684 sq = &sg->ff_stageq[pri];
685 /*
686 * Check the txop limit to insure the aggregate fits.
687 */
688 limit = IEEE80211_TXOP_TO_US(
689 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit);
690 if (limit != 0 &&
691 (txtime = ff_approx_txtime(ni, m, mstaged)) > limit) {
692 /*
693 * Aggregate too long, return to the caller for direct
694 * transmission. In addition, flush any pending frame
695 * before sending this one.
696 */
697 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
698 "%s: txtime %u exceeds txop limit %u\n",
699 __func__, txtime, limit);
700
701 tap->txa_private = NULL;
702 if (mstaged != NULL)
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703 stageq_remove(ic, sq, mstaged);
704 IEEE80211_UNLOCK(ic);
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705
706 if (mstaged != NULL) {
085ff963 707 IEEE80211_TX_LOCK(ic);
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708 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
709 "%s: flush staged frame", __func__);
710 /* encap and xmit */
711 ff_transmit(ni, mstaged);
085ff963 712 IEEE80211_TX_UNLOCK(ic);
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713 }
714 return m; /* NB: original frame */
715 }
716 /*
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.
722 */
723 if (mstaged != NULL) {
724 tap->txa_private = NULL;
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725 stageq_remove(ic, sq, mstaged);
726 IEEE80211_UNLOCK(ic);
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727
728 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
729 "%s: aggregate fast-frame", __func__);
730 /*
731 * Release the node reference; we only need
732 * the one already in mstaged.
733 */
734 KASSERT(mstaged->m_pkthdr.rcvif == (void *)ni,
735 ("rcvif %p ni %p", mstaged->m_pkthdr.rcvif, ni));
736 ieee80211_free_node(ni);
737
738 m->m_nextpkt = NULL;
739 mstaged->m_nextpkt = m;
740 mstaged->m_flags |= M_FF; /* NB: mark for encap work */
741 } else {
742 KASSERT(tap->txa_private == NULL,
743 ("txa_private %p", tap->txa_private));
744 tap->txa_private = m;
745
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746 stageq_add(ic, sq, m);
747 IEEE80211_UNLOCK(ic);
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748
749 IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni,
750 "%s: stage frame, %u queued", __func__, sq->depth);
751 /* NB: mstaged is NULL */
752 }
753 return mstaged;
754}
755
756void
757ieee80211_ff_node_init(struct ieee80211_node *ni)
758{
759 /*
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.
763 */
764 ieee80211_ff_node_cleanup(ni);
765}
766
767void
768ieee80211_ff_node_cleanup(struct ieee80211_node *ni)
769{
770 struct ieee80211com *ic = ni->ni_ic;
771 struct ieee80211_superg *sg = ic->ic_superg;
772 struct ieee80211_tx_ampdu *tap;
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773 struct mbuf *m, *next_m, *head;
774 int tid;
32176cfd 775
085ff963 776 IEEE80211_LOCK(ic);
32176cfd 777 head = NULL;
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778 for (tid = 0; tid < WME_NUM_TID; tid++) {
779 int ac = TID_TO_WME_AC(tid);
780
781 tap = &ni->ni_tx_ampdu[tid];
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782 m = tap->txa_private;
783 if (m != NULL) {
784 tap->txa_private = NULL;
085ff963 785 stageq_remove(ic, &sg->ff_stageq[ac], m);
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786 m->m_nextpkt = head;
787 head = m;
788 }
789 }
085ff963 790 IEEE80211_UNLOCK(ic);
32176cfd 791
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792 /*
793 * Free mbufs, taking care to not dereference the mbuf after
794 * we free it (hence grabbing m_nextpkt before we free it.)
795 */
796 m = head;
797 while (m != NULL) {
798 next_m = m->m_nextpkt;
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799 m_freem(m);
800 ieee80211_free_node(ni);
085ff963 801 m = next_m;
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802 }
803}
804
805/*
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.
810 */
811void
812ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags)
813{
814 struct ieee80211com *ic = vap->iv_ic;
815 struct ieee80211_channel *chan;
816
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);
822 return;
823 }
824
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);
830
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 */
838}
839
840/*
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.
844 */
845static int
846getathcap(struct ieee80211vap *vap, int cap)
847{
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;
851 else
852 return (vap->iv_flags & cap) != 0;
853}
854
855static int
856superg_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
857{
858 switch (ireq->i_type) {
859 case IEEE80211_IOC_FF:
860 ireq->i_val = getathcap(vap, IEEE80211_F_FF);
861 break;
862 case IEEE80211_IOC_TURBOP:
863 ireq->i_val = getathcap(vap, IEEE80211_F_TURBOP);
864 break;
865 default:
866 return ENOSYS;
867 }
868 return 0;
869}
870IEEE80211_IOCTL_GET(superg, superg_ioctl_get80211);
871
872static int
873superg_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
874{
875 switch (ireq->i_type) {
876 case IEEE80211_IOC_FF:
877 if (ireq->i_val) {
878 if ((vap->iv_caps & IEEE80211_C_FF) == 0)
879 return EOPNOTSUPP;
880 vap->iv_flags |= IEEE80211_F_FF;
881 } else
882 vap->iv_flags &= ~IEEE80211_F_FF;
883 return ENETRESET;
884 case IEEE80211_IOC_TURBOP:
885 if (ireq->i_val) {
886 if ((vap->iv_caps & IEEE80211_C_TURBOP) == 0)
887 return EOPNOTSUPP;
888 vap->iv_flags |= IEEE80211_F_TURBOP;
889 } else
890 vap->iv_flags &= ~IEEE80211_F_TURBOP;
891 return ENETRESET;
892 default:
893 return ENOSYS;
894 }
895 return 0;
896}
897IEEE80211_IOCTL_SET(superg, superg_ioctl_set80211);
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898
899#endif /* IEEE80211_SUPPORT_SUPERG */