Commit | Line | Data |
---|---|---|
f078f209 | 1 | /* |
5b68138e | 2 | * Copyright (c) 2008-2011 Atheros Communications Inc. |
f078f209 LR |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
b7f080cf | 17 | #include <linux/dma-mapping.h> |
394cf0a1 | 18 | #include "ath9k.h" |
f078f209 | 19 | |
5379c8a2 S |
20 | #define FUDGE 2 |
21 | ||
ba4903f9 FF |
22 | static void ath9k_reset_beacon_status(struct ath_softc *sc) |
23 | { | |
24 | sc->beacon.tx_processed = false; | |
25 | sc->beacon.tx_last = false; | |
26 | } | |
27 | ||
f078f209 | 28 | /* |
f078f209 LR |
29 | * This function will modify certain transmit queue properties depending on |
30 | * the operating mode of the station (AP or AdHoc). Parameters are AIFS | |
31 | * settings and channel width min/max | |
32 | */ | |
7e52c8aa | 33 | static void ath9k_beaconq_config(struct ath_softc *sc) |
f078f209 | 34 | { |
cbe61d8a | 35 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 36 | struct ath_common *common = ath9k_hw_common(ah); |
94db2936 | 37 | struct ath9k_tx_queue_info qi, qi_be; |
066dae93 | 38 | struct ath_txq *txq; |
f078f209 | 39 | |
b77f483f | 40 | ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi); |
7e52c8aa | 41 | |
2664d666 TP |
42 | if (sc->sc_ah->opmode == NL80211_IFTYPE_AP || |
43 | sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) { | |
f078f209 LR |
44 | /* Always burst out beacon and CAB traffic. */ |
45 | qi.tqi_aifs = 1; | |
46 | qi.tqi_cwmin = 0; | |
47 | qi.tqi_cwmax = 0; | |
48 | } else { | |
49 | /* Adhoc mode; important thing is to use 2x cwmin. */ | |
bea843c7 | 50 | txq = sc->tx.txq_map[IEEE80211_AC_BE]; |
066dae93 | 51 | ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be); |
94db2936 | 52 | qi.tqi_aifs = qi_be.tqi_aifs; |
d202caff VN |
53 | if (ah->slottime == ATH9K_SLOT_TIME_20) |
54 | qi.tqi_cwmin = 2*qi_be.tqi_cwmin; | |
55 | else | |
56 | qi.tqi_cwmin = 4*qi_be.tqi_cwmin; | |
94db2936 | 57 | qi.tqi_cwmax = qi_be.tqi_cwmax; |
f078f209 LR |
58 | } |
59 | ||
b77f483f | 60 | if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) { |
7e52c8aa | 61 | ath_err(common, "Unable to update h/w beacon queue parameters\n"); |
f078f209 | 62 | } else { |
9fc9ab0a | 63 | ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); |
f078f209 LR |
64 | } |
65 | } | |
66 | ||
67 | /* | |
f078f209 | 68 | * Associates the beacon frame buffer with a transmit descriptor. Will set |
dd347f2f FF |
69 | * up rate codes, and channel flags. Beacons are always sent out at the |
70 | * lowest rate, and are not retried. | |
f078f209 | 71 | */ |
fb6e252f | 72 | static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif, |
64b84010 | 73 | struct ath_buf *bf, int rateidx) |
f078f209 | 74 | { |
a22be22a | 75 | struct sk_buff *skb = bf->bf_mpdu; |
cbe61d8a | 76 | struct ath_hw *ah = sc->sc_ah; |
43c27613 | 77 | struct ath_common *common = ath9k_hw_common(ah); |
493cf04f | 78 | struct ath_tx_info info; |
545750d3 | 79 | struct ieee80211_supported_band *sband; |
493cf04f | 80 | u8 chainmask = ah->txchainmask; |
8b537686 | 81 | u8 i, rate = 0; |
f078f209 | 82 | |
bff11766 | 83 | sband = &common->sbands[sc->cur_chandef.chan->band]; |
64b84010 | 84 | rate = sband->bitrates[rateidx].hw_value; |
d47a61aa | 85 | if (vif->bss_conf.use_short_preamble) |
64b84010 | 86 | rate |= sband->bitrates[rateidx].hw_value_short; |
9fc9ab0a | 87 | |
493cf04f FF |
88 | memset(&info, 0, sizeof(info)); |
89 | info.pkt_len = skb->len + FCS_LEN; | |
90 | info.type = ATH9K_PKT_TYPE_BEACON; | |
8b537686 LB |
91 | for (i = 0; i < 4; i++) |
92 | info.txpower[i] = MAX_RATE_POWER; | |
493cf04f FF |
93 | info.keyix = ATH9K_TXKEYIX_INVALID; |
94 | info.keytype = ATH9K_KEY_TYPE_CLEAR; | |
cd484aeb | 95 | info.flags = ATH9K_TXDESC_NOACK | ATH9K_TXDESC_CLRDMASK; |
493cf04f FF |
96 | |
97 | info.buf_addr[0] = bf->bf_buf_addr; | |
98 | info.buf_len[0] = roundup(skb->len, 4); | |
99 | ||
100 | info.is_first = true; | |
101 | info.is_last = true; | |
102 | ||
103 | info.qcu = sc->beacon.beaconq; | |
104 | ||
105 | info.rates[0].Tries = 1; | |
106 | info.rates[0].Rate = rate; | |
107 | info.rates[0].ChSel = ath_txchainmask_reduction(sc, chainmask, rate); | |
108 | ||
109 | ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); | |
f078f209 LR |
110 | } |
111 | ||
fb6e252f SM |
112 | static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw, |
113 | struct ieee80211_vif *vif) | |
f078f209 | 114 | { |
9ac58615 | 115 | struct ath_softc *sc = hw->priv; |
c46917bb | 116 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
f078f209 | 117 | struct ath_buf *bf; |
aa45fe96 | 118 | struct ath_vif *avp = (void *)vif->drv_priv; |
f078f209 | 119 | struct sk_buff *skb; |
aa45fe96 | 120 | struct ath_txq *cabq = sc->beacon.cabq; |
147583c0 | 121 | struct ieee80211_tx_info *info; |
fb6e252f | 122 | struct ieee80211_mgmt *mgmt_hdr; |
980b24da S |
123 | int cabq_depth; |
124 | ||
aa45fe96 | 125 | if (avp->av_bcbuf == NULL) |
f078f209 | 126 | return NULL; |
980b24da | 127 | |
f078f209 | 128 | bf = avp->av_bcbuf; |
a22be22a | 129 | skb = bf->bf_mpdu; |
a8fff50e | 130 | if (skb) { |
c1739eb3 | 131 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
9fc9ab0a | 132 | skb->len, DMA_TO_DEVICE); |
3fbb9d95 | 133 | dev_kfree_skb_any(skb); |
6cf9e995 | 134 | bf->bf_buf_addr = 0; |
1adb2e2b | 135 | bf->bf_mpdu = NULL; |
a8fff50e | 136 | } |
f078f209 | 137 | |
c52f33d0 | 138 | skb = ieee80211_beacon_get(hw, vif); |
a8fff50e JM |
139 | if (skb == NULL) |
140 | return NULL; | |
fb6e252f SM |
141 | |
142 | bf->bf_mpdu = skb; | |
143 | ||
144 | mgmt_hdr = (struct ieee80211_mgmt *)skb->data; | |
145 | mgmt_hdr->u.beacon.timestamp = avp->tsf_adjust; | |
980b24da | 146 | |
147583c0 | 147 | info = IEEE80211_SKB_CB(skb); |
ca14405e SM |
148 | |
149 | ath_assign_seq(common, skb); | |
980b24da | 150 | |
3ae07d39 FF |
151 | if (vif->p2p) |
152 | ath9k_beacon_add_noa(sc, avp, skb); | |
153 | ||
c1739eb3 BG |
154 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
155 | skb->len, DMA_TO_DEVICE); | |
7da3c55c | 156 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
f8316df1 LR |
157 | dev_kfree_skb_any(skb); |
158 | bf->bf_mpdu = NULL; | |
6cf9e995 | 159 | bf->bf_buf_addr = 0; |
3800276a | 160 | ath_err(common, "dma_mapping_error on beaconing\n"); |
f8316df1 LR |
161 | return NULL; |
162 | } | |
f078f209 | 163 | |
c52f33d0 | 164 | skb = ieee80211_get_buffered_bc(hw, vif); |
f078f209 | 165 | |
f078f209 LR |
166 | /* |
167 | * if the CABQ traffic from previous DTIM is pending and the current | |
168 | * beacon is also a DTIM. | |
17d7904d S |
169 | * 1) if there is only one vif let the cab traffic continue. |
170 | * 2) if there are more than one vif and we are using staggered | |
f078f209 | 171 | * beacons, then drain the cabq by dropping all the frames in |
17d7904d | 172 | * the cabq so that the current vifs cab traffic can be scheduled. |
f078f209 LR |
173 | */ |
174 | spin_lock_bh(&cabq->axq_lock); | |
175 | cabq_depth = cabq->axq_depth; | |
176 | spin_unlock_bh(&cabq->axq_lock); | |
177 | ||
e022edbd | 178 | if (skb && cabq_depth) { |
ca529c93 | 179 | if (sc->cur_chan->nvifs > 1) { |
d2182b69 | 180 | ath_dbg(common, BEACON, |
226afe68 | 181 | "Flushing previous cabq traffic\n"); |
1381559b | 182 | ath_draintxq(sc, cabq); |
f078f209 LR |
183 | } |
184 | } | |
185 | ||
fb6e252f | 186 | ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx); |
f078f209 | 187 | |
59505c02 FF |
188 | if (skb) |
189 | ath_tx_cabq(hw, vif, skb); | |
f078f209 | 190 | |
f078f209 LR |
191 | return bf; |
192 | } | |
193 | ||
130ef6e9 | 194 | void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif) |
f078f209 | 195 | { |
c46917bb | 196 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
130ef6e9 SM |
197 | struct ath_vif *avp = (void *)vif->drv_priv; |
198 | int slot; | |
f078f209 | 199 | |
130ef6e9 SM |
200 | avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list); |
201 | list_del(&avp->av_bcbuf->list); | |
f078f209 | 202 | |
130ef6e9 SM |
203 | for (slot = 0; slot < ATH_BCBUF; slot++) { |
204 | if (sc->beacon.bslot[slot] == NULL) { | |
205 | avp->av_bslot = slot; | |
130ef6e9 | 206 | break; |
f078f209 LR |
207 | } |
208 | } | |
209 | ||
130ef6e9 SM |
210 | sc->beacon.bslot[avp->av_bslot] = vif; |
211 | sc->nbcnvifs++; | |
f078f209 | 212 | |
130ef6e9 SM |
213 | ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n", |
214 | avp->av_bslot); | |
215 | } | |
f078f209 | 216 | |
130ef6e9 SM |
217 | void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif) |
218 | { | |
219 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
220 | struct ath_vif *avp = (void *)vif->drv_priv; | |
221 | struct ath_buf *bf = avp->av_bcbuf; | |
1cf48f22 | 222 | struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; |
f078f209 | 223 | |
130ef6e9 SM |
224 | ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n", |
225 | avp->av_bslot); | |
f078f209 | 226 | |
130ef6e9 | 227 | tasklet_disable(&sc->bcon_tasklet); |
f078f209 | 228 | |
1cf48f22 FF |
229 | cur_conf->enable_beacon &= ~BIT(avp->av_bslot); |
230 | ||
130ef6e9 SM |
231 | if (bf && bf->bf_mpdu) { |
232 | struct sk_buff *skb = bf->bf_mpdu; | |
233 | dma_unmap_single(sc->dev, bf->bf_buf_addr, | |
234 | skb->len, DMA_TO_DEVICE); | |
f8316df1 LR |
235 | dev_kfree_skb_any(skb); |
236 | bf->bf_mpdu = NULL; | |
6cf9e995 | 237 | bf->bf_buf_addr = 0; |
f8316df1 | 238 | } |
f078f209 | 239 | |
130ef6e9 | 240 | avp->av_bcbuf = NULL; |
130ef6e9 SM |
241 | sc->beacon.bslot[avp->av_bslot] = NULL; |
242 | sc->nbcnvifs--; | |
243 | list_add_tail(&bf->list, &sc->beacon.bbuf); | |
f078f209 | 244 | |
130ef6e9 | 245 | tasklet_enable(&sc->bcon_tasklet); |
f078f209 LR |
246 | } |
247 | ||
fb6e252f SM |
248 | static int ath9k_beacon_choose_slot(struct ath_softc *sc) |
249 | { | |
250 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
ca900ac9 | 251 | struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; |
fb6e252f SM |
252 | u16 intval; |
253 | u32 tsftu; | |
254 | u64 tsf; | |
255 | int slot; | |
256 | ||
2664d666 TP |
257 | if (sc->sc_ah->opmode != NL80211_IFTYPE_AP && |
258 | sc->sc_ah->opmode != NL80211_IFTYPE_MESH_POINT) { | |
fb6e252f SM |
259 | ath_dbg(common, BEACON, "slot 0, tsf: %llu\n", |
260 | ath9k_hw_gettsf64(sc->sc_ah)); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL; | |
265 | tsf = ath9k_hw_gettsf64(sc->sc_ah); | |
266 | tsf += TU_TO_USEC(sc->sc_ah->config.sw_beacon_response_time); | |
267 | tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF); | |
268 | slot = (tsftu % (intval * ATH_BCBUF)) / intval; | |
269 | ||
270 | ath_dbg(common, BEACON, "slot: %d tsf: %llu tsftu: %u\n", | |
271 | slot, tsf, tsftu / ATH_BCBUF); | |
272 | ||
273 | return slot; | |
274 | } | |
275 | ||
c32e4e51 | 276 | static void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif) |
2f8e82e8 SM |
277 | { |
278 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
2f8e82e8 | 279 | struct ath_vif *avp = (void *)vif->drv_priv; |
9a9c4fbc | 280 | struct ath_beacon_config *cur_conf = &avp->chanctx->beacon; |
63ded3f0 | 281 | u32 tsfadjust; |
2f8e82e8 SM |
282 | |
283 | if (avp->av_bslot == 0) | |
284 | return; | |
285 | ||
63ded3f0 FF |
286 | tsfadjust = cur_conf->beacon_interval * avp->av_bslot; |
287 | tsfadjust = TU_TO_USEC(tsfadjust) / ATH_BCBUF; | |
288 | avp->tsf_adjust = cpu_to_le64(tsfadjust); | |
2f8e82e8 SM |
289 | |
290 | ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n", | |
291 | (unsigned long long)tsfadjust, avp->av_bslot); | |
292 | } | |
293 | ||
4effc6fd | 294 | bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif) |
d074e8d5 | 295 | { |
d074e8d5 SW |
296 | if (!vif || !vif->csa_active) |
297 | return false; | |
298 | ||
299 | if (!ieee80211_csa_is_complete(vif)) | |
300 | return false; | |
301 | ||
302 | ieee80211_csa_finish(vif); | |
d074e8d5 SW |
303 | return true; |
304 | } | |
305 | ||
4effc6fd MK |
306 | static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif) |
307 | { | |
308 | struct ath_softc *sc = data; | |
309 | ath9k_csa_is_finished(sc, vif); | |
310 | } | |
311 | ||
312 | void ath9k_csa_update(struct ath_softc *sc) | |
313 | { | |
5869e795 FF |
314 | ieee80211_iterate_active_interfaces_atomic(sc->hw, |
315 | IEEE80211_IFACE_ITER_NORMAL, | |
316 | ath9k_csa_update_vif, sc); | |
4effc6fd MK |
317 | } |
318 | ||
fb6e252f | 319 | void ath9k_beacon_tasklet(unsigned long data) |
f078f209 | 320 | { |
f078f209 | 321 | struct ath_softc *sc = (struct ath_softc *)data; |
cbe61d8a | 322 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 323 | struct ath_common *common = ath9k_hw_common(ah); |
f078f209 | 324 | struct ath_buf *bf = NULL; |
2c3db3d5 | 325 | struct ieee80211_vif *vif; |
98f0a5eb | 326 | bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); |
2c3db3d5 | 327 | int slot; |
f078f209 | 328 | |
eefa01dd | 329 | if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) { |
4e7fb718 RM |
330 | ath_dbg(common, RESET, |
331 | "reset work is pending, skip beaconing now\n"); | |
332 | return; | |
333 | } | |
124b979b | 334 | |
f078f209 LR |
335 | /* |
336 | * Check if the previous beacon has gone out. If | |
337 | * not don't try to post another, skip this period | |
338 | * and wait for the next. Missed beacons indicate | |
339 | * a problem and should not occur. If we miss too | |
340 | * many consecutive beacons reset the device. | |
341 | */ | |
b77f483f S |
342 | if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) { |
343 | sc->beacon.bmisscnt++; | |
9546aae0 | 344 | |
1e516ca7 SM |
345 | ath9k_hw_check_nav(ah); |
346 | ||
415ec61b SM |
347 | /* |
348 | * If the previous beacon has not been transmitted | |
349 | * and a MAC/BB hang has been identified, return | |
350 | * here because a chip reset would have been | |
351 | * initiated. | |
352 | */ | |
353 | if (!ath_hw_check(sc)) | |
354 | return; | |
b381fa32 | 355 | |
c944daf4 | 356 | if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) { |
d2182b69 | 357 | ath_dbg(common, BSTUCK, |
226afe68 JP |
358 | "missed %u consecutive beacons\n", |
359 | sc->beacon.bmisscnt); | |
efff395e | 360 | ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq); |
87c510fe FF |
361 | if (sc->beacon.bmisscnt > 3) |
362 | ath9k_hw_bstuck_nfcal(ah); | |
b77f483f | 363 | } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) { |
d2182b69 | 364 | ath_dbg(common, BSTUCK, "beacon is officially stuck\n"); |
4e7fb718 | 365 | sc->beacon.bmisscnt = 0; |
124b979b | 366 | ath9k_queue_reset(sc, RESET_TYPE_BEACON_STUCK); |
f078f209 | 367 | } |
9546aae0 | 368 | |
f078f209 LR |
369 | return; |
370 | } | |
980b24da | 371 | |
fb6e252f SM |
372 | slot = ath9k_beacon_choose_slot(sc); |
373 | vif = sc->beacon.bslot[slot]; | |
980b24da | 374 | |
4effc6fd | 375 | /* EDMA devices check that in the tx completion function. */ |
748299f2 | 376 | if (!edma) { |
27babf9f | 377 | if (ath9k_is_chanctx_enabled()) { |
70b06dac SM |
378 | ath_chanctx_beacon_sent_ev(sc, |
379 | ATH_CHANCTX_EVENT_BEACON_SENT); | |
27babf9f | 380 | } |
748299f2 FF |
381 | |
382 | if (ath9k_csa_is_finished(sc, vif)) | |
383 | return; | |
384 | } | |
4effc6fd | 385 | |
fb6e252f SM |
386 | if (!vif || !vif->bss_conf.enable_beacon) |
387 | return; | |
980b24da | 388 | |
27babf9f SM |
389 | if (ath9k_is_chanctx_enabled()) { |
390 | ath_chanctx_event(sc, vif, ATH_CHANCTX_EVENT_BEACON_PREPARE); | |
391 | } | |
392 | ||
fb6e252f | 393 | bf = ath9k_beacon_generate(sc->hw, vif); |
c944daf4 | 394 | |
fb6e252f SM |
395 | if (sc->beacon.bmisscnt != 0) { |
396 | ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n", | |
397 | sc->beacon.bmisscnt); | |
398 | sc->beacon.bmisscnt = 0; | |
f078f209 | 399 | } |
9546aae0 | 400 | |
f078f209 LR |
401 | /* |
402 | * Handle slot time change when a non-ERP station joins/leaves | |
403 | * an 11g network. The 802.11 layer notifies us via callback, | |
404 | * we mark updateslot, then wait one beacon before effecting | |
405 | * the change. This gives associated stations at least one | |
406 | * beacon interval to note the state change. | |
407 | * | |
408 | * NB: The slot time change state machine is clocked according | |
409 | * to whether we are bursting or staggering beacons. We | |
410 | * recognize the request to update and record the current | |
411 | * slot then don't transition until that slot is reached | |
412 | * again. If we miss a beacon for that slot then we'll be | |
413 | * slow to transition but we'll be sure at least one beacon | |
414 | * interval has passed. When bursting slot is always left | |
415 | * set to ATH_BCBUF so this check is a noop. | |
416 | */ | |
b77f483f | 417 | if (sc->beacon.updateslot == UPDATE) { |
fb6e252f | 418 | sc->beacon.updateslot = COMMIT; |
b77f483f | 419 | sc->beacon.slotupdate = slot; |
fb6e252f SM |
420 | } else if (sc->beacon.updateslot == COMMIT && |
421 | sc->beacon.slotupdate == slot) { | |
0005baf4 FF |
422 | ah->slottime = sc->beacon.slottime; |
423 | ath9k_hw_init_global_settings(ah); | |
b77f483f | 424 | sc->beacon.updateslot = OK; |
ff37e337 | 425 | } |
fb6e252f SM |
426 | |
427 | if (bf) { | |
428 | ath9k_reset_beacon_status(sc); | |
429 | ||
430 | ath_dbg(common, BEACON, | |
431 | "Transmitting beacon for slot: %d\n", slot); | |
432 | ||
f078f209 | 433 | /* NB: cabq traffic should already be queued and primed */ |
fb6e252f | 434 | ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr); |
98f0a5eb MSS |
435 | |
436 | if (!edma) | |
437 | ath9k_hw_txstart(ah, sc->beacon.beaconq); | |
f078f209 | 438 | } |
f078f209 LR |
439 | } |
440 | ||
1a6404a1 SM |
441 | /* |
442 | * Both nexttbtt and intval have to be in usecs. | |
443 | */ | |
444 | static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt, | |
445 | u32 intval, bool reset_tsf) | |
21526d57 | 446 | { |
ef4ad633 | 447 | struct ath_hw *ah = sc->sc_ah; |
21526d57 | 448 | |
ef4ad633 | 449 | ath9k_hw_disable_interrupts(ah); |
1a6404a1 SM |
450 | if (reset_tsf) |
451 | ath9k_hw_reset_tsf(ah); | |
7e52c8aa | 452 | ath9k_beaconq_config(sc); |
ef4ad633 SM |
453 | ath9k_hw_beaconinit(ah, nexttbtt, intval); |
454 | sc->beacon.bmisscnt = 0; | |
455 | ath9k_hw_set_interrupts(ah); | |
456 | ath9k_hw_enable_interrupts(ah); | |
21526d57 LR |
457 | } |
458 | ||
f078f209 | 459 | /* |
5379c8a2 S |
460 | * For multi-bss ap support beacons are either staggered evenly over N slots or |
461 | * burst together. For the former arrange for the SWBA to be delivered for each | |
462 | * slot. Slots that are not occupied will generate nothing. | |
f078f209 | 463 | */ |
ef4ad633 SM |
464 | static void ath9k_beacon_config_ap(struct ath_softc *sc, |
465 | struct ath_beacon_config *conf) | |
f078f209 | 466 | { |
3069168c | 467 | struct ath_hw *ah = sc->sc_ah; |
f078f209 | 468 | |
fa7b52fa OR |
469 | ath9k_cmn_beacon_config_ap(ah, conf, ATH_BCBUF); |
470 | ath9k_beacon_init(sc, conf->nexttbtt, conf->intval, false); | |
5379c8a2 | 471 | } |
459f5f90 | 472 | |
cbbdf2ae | 473 | static void ath9k_beacon_config_sta(struct ath_hw *ah, |
ef4ad633 | 474 | struct ath_beacon_config *conf) |
5379c8a2 S |
475 | { |
476 | struct ath9k_beacon_state bs; | |
5379c8a2 | 477 | |
cbbdf2ae | 478 | if (ath9k_cmn_beacon_config_sta(ah, conf, &bs) == -EPERM) |
1a20034a | 479 | return; |
980b24da | 480 | |
4df3071e | 481 | ath9k_hw_disable_interrupts(ah); |
3069168c PR |
482 | ath9k_hw_set_sta_beacon_timers(ah, &bs); |
483 | ah->imask |= ATH9K_INT_BMISS; | |
deb75188 | 484 | |
72d874c6 | 485 | ath9k_hw_set_interrupts(ah); |
e8fe7336 | 486 | ath9k_hw_enable_interrupts(ah); |
5379c8a2 | 487 | } |
f078f209 | 488 | |
ef4ad633 SM |
489 | static void ath9k_beacon_config_adhoc(struct ath_softc *sc, |
490 | struct ath_beacon_config *conf) | |
5379c8a2 | 491 | { |
3069168c PR |
492 | struct ath_hw *ah = sc->sc_ah; |
493 | struct ath_common *common = ath9k_hw_common(ah); | |
dd347f2f | 494 | |
ba4903f9 FF |
495 | ath9k_reset_beacon_status(sc); |
496 | ||
4c9a1f32 | 497 | ath9k_cmn_beacon_config_adhoc(ah, conf); |
9fc9ab0a | 498 | |
4c9a1f32 | 499 | ath9k_beacon_init(sc, conf->nexttbtt, conf->intval, conf->ibss_creator); |
1a6404a1 SM |
500 | |
501 | /* | |
502 | * Set the global 'beacon has been configured' flag for the | |
503 | * joiner case in IBSS mode. | |
504 | */ | |
505 | if (!conf->ibss_creator && conf->enable_beacon) | |
eefa01dd | 506 | set_bit(ATH_OP_BEACONS, &common->op_flags); |
f078f209 LR |
507 | } |
508 | ||
c32e4e51 FF |
509 | static bool ath9k_allow_beacon_config(struct ath_softc *sc, |
510 | struct ieee80211_vif *vif) | |
f078f209 | 511 | { |
c46917bb | 512 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
12a1b3d4 SM |
513 | struct ath_vif *avp = (void *)vif->drv_priv; |
514 | ||
515 | if (ath9k_is_chanctx_enabled()) { | |
516 | /* | |
517 | * If the VIF is not present in the current channel context, | |
518 | * then we can't do the usual opmode checks. Allow the | |
519 | * beacon config for the VIF to be updated in this case and | |
520 | * return immediately. | |
521 | */ | |
522 | if (sc->cur_chan != avp->chanctx) | |
523 | return true; | |
524 | } | |
5379c8a2 | 525 | |
ef4ad633 | 526 | if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { |
1cf48f22 | 527 | if (vif->type != NL80211_IFTYPE_AP) { |
ef4ad633 SM |
528 | ath_dbg(common, CONFIG, |
529 | "An AP interface is already present !\n"); | |
530 | return false; | |
531 | } | |
99e4d43a | 532 | } |
ef4ad633 SM |
533 | |
534 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) { | |
535 | if ((vif->type == NL80211_IFTYPE_STATION) && | |
eefa01dd | 536 | test_bit(ATH_OP_BEACONS, &common->op_flags) && |
9a9c4fbc | 537 | vif != sc->cur_chan->primary_sta) { |
ef4ad633 SM |
538 | ath_dbg(common, CONFIG, |
539 | "Beacon already configured for a station interface\n"); | |
540 | return false; | |
541 | } | |
ee832d3e | 542 | } |
ef4ad633 | 543 | |
99e4d43a RM |
544 | return true; |
545 | } | |
546 | ||
ef4ad633 | 547 | static void ath9k_cache_beacon_config(struct ath_softc *sc, |
9a9c4fbc | 548 | struct ath_chanctx *ctx, |
ef4ad633 | 549 | struct ieee80211_bss_conf *bss_conf) |
99e4d43a | 550 | { |
ef4ad633 | 551 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
9a9c4fbc | 552 | struct ath_beacon_config *cur_conf = &ctx->beacon; |
ee832d3e | 553 | |
ef4ad633 SM |
554 | ath_dbg(common, BEACON, |
555 | "Caching beacon data for BSS: %pM\n", bss_conf->bssid); | |
99e4d43a | 556 | |
99e4d43a RM |
557 | cur_conf->beacon_interval = bss_conf->beacon_int; |
558 | cur_conf->dtim_period = bss_conf->dtim_period; | |
4801416c | 559 | cur_conf->dtim_count = 1; |
1a6404a1 | 560 | cur_conf->ibss_creator = bss_conf->ibss_creator; |
6b96f93e | 561 | |
c4f9f16b VT |
562 | /* |
563 | * It looks like mac80211 may end up using beacon interval of zero in | |
564 | * some cases (at least for mesh point). Avoid getting into an | |
565 | * infinite loop by using a bit safer value instead. To be safe, | |
566 | * do sanity check on beacon interval for all operating modes. | |
567 | */ | |
568 | if (cur_conf->beacon_interval == 0) | |
569 | cur_conf->beacon_interval = 100; | |
6b96f93e | 570 | |
76c93983 BG |
571 | cur_conf->bmiss_timeout = |
572 | ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval; | |
573 | ||
ee832d3e | 574 | /* |
3a2329f2 MSS |
575 | * We don't parse dtim period from mac80211 during the driver |
576 | * initialization as it breaks association with hidden-ssid | |
577 | * AP and it causes latency in roaming | |
ee832d3e MSS |
578 | */ |
579 | if (cur_conf->dtim_period == 0) | |
580 | cur_conf->dtim_period = 1; | |
581 | ||
99e4d43a RM |
582 | } |
583 | ||
ef4ad633 SM |
584 | void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif, |
585 | u32 changed) | |
8e22ad32 | 586 | { |
ef4ad633 | 587 | struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
eefa01dd OR |
588 | struct ath_hw *ah = sc->sc_ah; |
589 | struct ath_common *common = ath9k_hw_common(ah); | |
9a9c4fbc RM |
590 | struct ath_vif *avp = (void *)vif->drv_priv; |
591 | struct ath_chanctx *ctx = avp->chanctx; | |
592 | struct ath_beacon_config *cur_conf; | |
1a6404a1 SM |
593 | unsigned long flags; |
594 | bool skip_beacon = false; | |
8e22ad32 | 595 | |
9a9c4fbc RM |
596 | if (!ctx) |
597 | return; | |
598 | ||
599 | cur_conf = &avp->chanctx->beacon; | |
c32e4e51 FF |
600 | if (vif->type == NL80211_IFTYPE_AP) |
601 | ath9k_set_tsfadjust(sc, vif); | |
602 | ||
603 | if (!ath9k_allow_beacon_config(sc, vif)) | |
604 | return; | |
605 | ||
9a9c4fbc RM |
606 | if (vif->type == NL80211_IFTYPE_STATION) { |
607 | ath9k_cache_beacon_config(sc, ctx, bss_conf); | |
608 | if (ctx != sc->cur_chan) | |
609 | return; | |
610 | ||
ef4ad633 | 611 | ath9k_set_beacon(sc); |
eefa01dd | 612 | set_bit(ATH_OP_BEACONS, &common->op_flags); |
1a6404a1 | 613 | return; |
1a6404a1 SM |
614 | } |
615 | ||
616 | /* | |
617 | * Take care of multiple interfaces when | |
618 | * enabling/disabling SWBA. | |
619 | */ | |
620 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
1cf48f22 FF |
621 | bool enabled = cur_conf->enable_beacon; |
622 | ||
623 | if (!bss_conf->enable_beacon) { | |
624 | cur_conf->enable_beacon &= ~BIT(avp->av_bslot); | |
625 | } else { | |
626 | cur_conf->enable_beacon |= BIT(avp->av_bslot); | |
627 | if (!enabled) | |
628 | ath9k_cache_beacon_config(sc, ctx, bss_conf); | |
8e22ad32 | 629 | } |
1a6404a1 | 630 | } |
ef4ad633 | 631 | |
9a9c4fbc RM |
632 | if (ctx != sc->cur_chan) |
633 | return; | |
634 | ||
1a6404a1 SM |
635 | /* |
636 | * Configure the HW beacon registers only when we have a valid | |
637 | * beacon interval. | |
638 | */ | |
639 | if (cur_conf->beacon_interval) { | |
640 | /* | |
641 | * If we are joining an existing IBSS network, start beaconing | |
642 | * only after a TSF-sync has taken place. Ensure that this | |
643 | * happens by setting the appropriate flags. | |
644 | */ | |
645 | if ((changed & BSS_CHANGED_IBSS) && !bss_conf->ibss_creator && | |
646 | bss_conf->enable_beacon) { | |
647 | spin_lock_irqsave(&sc->sc_pm_lock, flags); | |
648 | sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON; | |
649 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); | |
650 | skip_beacon = true; | |
651 | } else { | |
ef4ad633 | 652 | ath9k_set_beacon(sc); |
ef4ad633 | 653 | } |
1a6404a1 SM |
654 | |
655 | /* | |
eefa01dd | 656 | * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode |
1a6404a1 SM |
657 | * here, it is done in ath9k_beacon_config_adhoc(). |
658 | */ | |
659 | if (cur_conf->enable_beacon && !skip_beacon) | |
eefa01dd | 660 | set_bit(ATH_OP_BEACONS, &common->op_flags); |
1a6404a1 | 661 | else |
eefa01dd | 662 | clear_bit(ATH_OP_BEACONS, &common->op_flags); |
8e22ad32 | 663 | } |
8e22ad32 RM |
664 | } |
665 | ||
ef4ad633 | 666 | void ath9k_set_beacon(struct ath_softc *sc) |
99e4d43a RM |
667 | { |
668 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
ca900ac9 | 669 | struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; |
99e4d43a | 670 | |
26cd322b | 671 | switch (sc->sc_ah->opmode) { |
6b96f93e | 672 | case NL80211_IFTYPE_AP: |
2664d666 | 673 | case NL80211_IFTYPE_MESH_POINT: |
ef4ad633 | 674 | ath9k_beacon_config_ap(sc, cur_conf); |
6b96f93e VT |
675 | break; |
676 | case NL80211_IFTYPE_ADHOC: | |
ef4ad633 | 677 | ath9k_beacon_config_adhoc(sc, cur_conf); |
6b96f93e VT |
678 | break; |
679 | case NL80211_IFTYPE_STATION: | |
cbbdf2ae | 680 | ath9k_beacon_config_sta(sc->sc_ah, cur_conf); |
6b96f93e VT |
681 | break; |
682 | default: | |
d2182b69 | 683 | ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); |
6b96f93e VT |
684 | return; |
685 | } | |
014cf3bb | 686 | } |