Commit | Line | Data |
---|---|---|
f078f209 | 1 | /* |
cee075a2 | 2 | * Copyright (c) 2008-2009 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 | ||
394cf0a1 | 17 | #include "ath9k.h" |
f078f209 | 18 | |
5379c8a2 S |
19 | #define FUDGE 2 |
20 | ||
f078f209 | 21 | /* |
f078f209 LR |
22 | * This function will modify certain transmit queue properties depending on |
23 | * the operating mode of the station (AP or AdHoc). Parameters are AIFS | |
24 | * settings and channel width min/max | |
25 | */ | |
94db2936 | 26 | int ath_beaconq_config(struct ath_softc *sc) |
f078f209 | 27 | { |
cbe61d8a | 28 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 29 | struct ath_common *common = ath9k_hw_common(ah); |
94db2936 | 30 | struct ath9k_tx_queue_info qi, qi_be; |
066dae93 | 31 | struct ath_txq *txq; |
f078f209 | 32 | |
b77f483f | 33 | ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi); |
2660b81a | 34 | if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { |
f078f209 LR |
35 | /* Always burst out beacon and CAB traffic. */ |
36 | qi.tqi_aifs = 1; | |
37 | qi.tqi_cwmin = 0; | |
38 | qi.tqi_cwmax = 0; | |
39 | } else { | |
40 | /* Adhoc mode; important thing is to use 2x cwmin. */ | |
066dae93 FF |
41 | txq = sc->tx.txq_map[WME_AC_BE]; |
42 | ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be); | |
94db2936 VN |
43 | qi.tqi_aifs = qi_be.tqi_aifs; |
44 | qi.tqi_cwmin = 4*qi_be.tqi_cwmin; | |
45 | qi.tqi_cwmax = qi_be.tqi_cwmax; | |
f078f209 LR |
46 | } |
47 | ||
b77f483f | 48 | if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) { |
3800276a JP |
49 | ath_err(common, |
50 | "Unable to update h/w beacon queue parameters\n"); | |
f078f209 LR |
51 | return 0; |
52 | } else { | |
9fc9ab0a | 53 | ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); |
f078f209 LR |
54 | return 1; |
55 | } | |
56 | } | |
57 | ||
58 | /* | |
f078f209 | 59 | * Associates the beacon frame buffer with a transmit descriptor. Will set |
dd347f2f FF |
60 | * up rate codes, and channel flags. Beacons are always sent out at the |
61 | * lowest rate, and are not retried. | |
f078f209 | 62 | */ |
9fc9ab0a | 63 | static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp, |
64b84010 | 64 | struct ath_buf *bf, int rateidx) |
f078f209 | 65 | { |
a22be22a | 66 | struct sk_buff *skb = bf->bf_mpdu; |
cbe61d8a | 67 | struct ath_hw *ah = sc->sc_ah; |
43c27613 | 68 | struct ath_common *common = ath9k_hw_common(ah); |
f078f209 | 69 | struct ath_desc *ds; |
980b24da | 70 | struct ath9k_11n_rate_series series[4]; |
dd347f2f | 71 | int flags, ctsrate = 0, ctsduration = 0; |
545750d3 FF |
72 | struct ieee80211_supported_band *sband; |
73 | u8 rate = 0; | |
f078f209 | 74 | |
f078f209 | 75 | ds = bf->bf_desc; |
f078f209 LR |
76 | flags = ATH9K_TXDESC_NOACK; |
77 | ||
a65e4cb4 | 78 | ds->ds_link = 0; |
f078f209 | 79 | |
545750d3 | 80 | sband = &sc->sbands[common->hw->conf.channel->band]; |
64b84010 | 81 | rate = sband->bitrates[rateidx].hw_value; |
672840ac | 82 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
64b84010 | 83 | rate |= sband->bitrates[rateidx].hw_value_short; |
9fc9ab0a S |
84 | |
85 | ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN, | |
86 | ATH9K_PKT_TYPE_BEACON, | |
87 | MAX_RATE_POWER, | |
88 | ATH9K_TXKEYIX_INVALID, | |
89 | ATH9K_KEY_TYPE_CLEAR, | |
90 | flags); | |
f078f209 LR |
91 | |
92 | /* NB: beacon's BufLen must be a multiple of 4 bytes */ | |
9fc9ab0a | 93 | ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4), |
cc610ac0 VT |
94 | true, true, ds, bf->bf_buf_addr, |
95 | sc->beacon.beaconq); | |
f078f209 | 96 | |
0345f37b | 97 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); |
f078f209 LR |
98 | series[0].Tries = 1; |
99 | series[0].Rate = rate; | |
ea066d5a MSS |
100 | series[0].ChSel = ath_txchainmask_reduction(sc, |
101 | common->tx_chainmask, series[0].Rate); | |
f078f209 | 102 | series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0; |
9fc9ab0a S |
103 | ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration, |
104 | series, 4, 0); | |
f078f209 LR |
105 | } |
106 | ||
28d16708 FF |
107 | static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
108 | { | |
9ac58615 | 109 | struct ath_softc *sc = hw->priv; |
28d16708 FF |
110 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
111 | struct ath_tx_control txctl; | |
112 | ||
113 | memset(&txctl, 0, sizeof(struct ath_tx_control)); | |
114 | txctl.txq = sc->beacon.cabq; | |
115 | ||
226afe68 JP |
116 | ath_dbg(common, ATH_DBG_XMIT, |
117 | "transmitting CABQ packet, skb: %p\n", skb); | |
28d16708 FF |
118 | |
119 | if (ath_tx_start(hw, skb, &txctl) != 0) { | |
226afe68 | 120 | ath_dbg(common, ATH_DBG_XMIT, "CABQ TX failed\n"); |
28d16708 FF |
121 | dev_kfree_skb_any(skb); |
122 | } | |
123 | } | |
124 | ||
c52f33d0 | 125 | static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw, |
2c3db3d5 | 126 | struct ieee80211_vif *vif) |
f078f209 | 127 | { |
9ac58615 | 128 | struct ath_softc *sc = hw->priv; |
c46917bb | 129 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
f078f209 | 130 | struct ath_buf *bf; |
17d7904d | 131 | struct ath_vif *avp; |
f078f209 | 132 | struct sk_buff *skb; |
f078f209 | 133 | struct ath_txq *cabq; |
147583c0 | 134 | struct ieee80211_tx_info *info; |
980b24da S |
135 | int cabq_depth; |
136 | ||
5640b08e | 137 | avp = (void *)vif->drv_priv; |
b77f483f | 138 | cabq = sc->beacon.cabq; |
f078f209 | 139 | |
014cf3bb | 140 | if ((avp->av_bcbuf == NULL) || !avp->is_bslot_active) |
f078f209 | 141 | return NULL; |
980b24da | 142 | |
9fc9ab0a S |
143 | /* Release the old beacon first */ |
144 | ||
f078f209 | 145 | bf = avp->av_bcbuf; |
a22be22a | 146 | skb = bf->bf_mpdu; |
a8fff50e | 147 | if (skb) { |
c1739eb3 | 148 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
9fc9ab0a | 149 | skb->len, DMA_TO_DEVICE); |
3fbb9d95 | 150 | dev_kfree_skb_any(skb); |
6cf9e995 | 151 | bf->bf_buf_addr = 0; |
a8fff50e | 152 | } |
f078f209 | 153 | |
9fc9ab0a S |
154 | /* Get a new beacon from mac80211 */ |
155 | ||
c52f33d0 | 156 | skb = ieee80211_beacon_get(hw, vif); |
a8fff50e JM |
157 | bf->bf_mpdu = skb; |
158 | if (skb == NULL) | |
159 | return NULL; | |
4ed96f04 JM |
160 | ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp = |
161 | avp->tsf_adjust; | |
980b24da | 162 | |
147583c0 JM |
163 | info = IEEE80211_SKB_CB(skb); |
164 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { | |
165 | /* | |
166 | * TODO: make sure the seq# gets assigned properly (vs. other | |
167 | * TX frames) | |
168 | */ | |
980b24da | 169 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
b77f483f | 170 | sc->tx.seq_no += 0x10; |
147583c0 | 171 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
b77f483f | 172 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
147583c0 | 173 | } |
980b24da | 174 | |
c1739eb3 BG |
175 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
176 | skb->len, DMA_TO_DEVICE); | |
7da3c55c | 177 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
f8316df1 LR |
178 | dev_kfree_skb_any(skb); |
179 | bf->bf_mpdu = NULL; | |
6cf9e995 | 180 | bf->bf_buf_addr = 0; |
3800276a | 181 | ath_err(common, "dma_mapping_error on beaconing\n"); |
f8316df1 LR |
182 | return NULL; |
183 | } | |
f078f209 | 184 | |
c52f33d0 | 185 | skb = ieee80211_get_buffered_bc(hw, vif); |
f078f209 | 186 | |
f078f209 LR |
187 | /* |
188 | * if the CABQ traffic from previous DTIM is pending and the current | |
189 | * beacon is also a DTIM. | |
17d7904d S |
190 | * 1) if there is only one vif let the cab traffic continue. |
191 | * 2) if there are more than one vif and we are using staggered | |
f078f209 | 192 | * beacons, then drain the cabq by dropping all the frames in |
17d7904d | 193 | * the cabq so that the current vifs cab traffic can be scheduled. |
f078f209 LR |
194 | */ |
195 | spin_lock_bh(&cabq->axq_lock); | |
196 | cabq_depth = cabq->axq_depth; | |
197 | spin_unlock_bh(&cabq->axq_lock); | |
198 | ||
e022edbd | 199 | if (skb && cabq_depth) { |
17d7904d | 200 | if (sc->nvifs > 1) { |
226afe68 JP |
201 | ath_dbg(common, ATH_DBG_BEACON, |
202 | "Flushing previous cabq traffic\n"); | |
9fc9ab0a | 203 | ath_draintxq(sc, cabq, false); |
f078f209 LR |
204 | } |
205 | } | |
206 | ||
64b84010 | 207 | ath_beacon_setup(sc, avp, bf, info->control.rates[0].idx); |
f078f209 | 208 | |
e022edbd | 209 | while (skb) { |
c52f33d0 JM |
210 | ath_tx_cabq(hw, skb); |
211 | skb = ieee80211_get_buffered_bc(hw, vif); | |
e022edbd | 212 | } |
f078f209 | 213 | |
f078f209 LR |
214 | return bf; |
215 | } | |
216 | ||
9ac58615 | 217 | int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif) |
f078f209 | 218 | { |
c46917bb | 219 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
17d7904d | 220 | struct ath_vif *avp; |
f078f209 LR |
221 | struct ath_buf *bf; |
222 | struct sk_buff *skb; | |
9814f6b3 | 223 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
459f5f90 | 224 | __le64 tstamp; |
f078f209 | 225 | |
5640b08e | 226 | avp = (void *)vif->drv_priv; |
f078f209 LR |
227 | |
228 | /* Allocate a beacon descriptor if we haven't done so. */ | |
229 | if (!avp->av_bcbuf) { | |
980b24da S |
230 | /* Allocate beacon state for hostap/ibss. We know |
231 | * a buffer is available. */ | |
b77f483f | 232 | avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, |
980b24da | 233 | struct ath_buf, list); |
f078f209 LR |
234 | list_del(&avp->av_bcbuf->list); |
235 | ||
4801416c | 236 | if (ath9k_uses_beacons(vif->type)) { |
f078f209 LR |
237 | int slot; |
238 | /* | |
17d7904d | 239 | * Assign the vif to a beacon xmit slot. As |
f078f209 LR |
240 | * above, this cannot fail to find one. |
241 | */ | |
242 | avp->av_bslot = 0; | |
243 | for (slot = 0; slot < ATH_BCBUF; slot++) | |
2c3db3d5 | 244 | if (sc->beacon.bslot[slot] == NULL) { |
f078f209 | 245 | avp->av_bslot = slot; |
014cf3bb | 246 | avp->is_bslot_active = false; |
774610e4 | 247 | |
f078f209 | 248 | /* NB: keep looking for a double slot */ |
774610e4 FF |
249 | if (slot == 0 || !sc->beacon.bslot[slot-1]) |
250 | break; | |
f078f209 | 251 | } |
2c3db3d5 JM |
252 | BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL); |
253 | sc->beacon.bslot[avp->av_bslot] = vif; | |
17d7904d | 254 | sc->nbcnvifs++; |
f078f209 LR |
255 | } |
256 | } | |
257 | ||
9fc9ab0a | 258 | /* release the previous beacon frame, if it already exists. */ |
f078f209 LR |
259 | bf = avp->av_bcbuf; |
260 | if (bf->bf_mpdu != NULL) { | |
a22be22a | 261 | skb = bf->bf_mpdu; |
c1739eb3 | 262 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
9fc9ab0a | 263 | skb->len, DMA_TO_DEVICE); |
f078f209 LR |
264 | dev_kfree_skb_any(skb); |
265 | bf->bf_mpdu = NULL; | |
6cf9e995 | 266 | bf->bf_buf_addr = 0; |
f078f209 LR |
267 | } |
268 | ||
9fc9ab0a | 269 | /* NB: the beacon data buffer must be 32-bit aligned. */ |
5640b08e | 270 | skb = ieee80211_beacon_get(sc->hw, vif); |
d7e86c32 | 271 | if (skb == NULL) |
f078f209 | 272 | return -ENOMEM; |
f078f209 | 273 | |
459f5f90 | 274 | tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp; |
dd347f2f | 275 | sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp); |
4ed96f04 | 276 | /* Calculate a TSF adjustment factor required for staggered beacons. */ |
f078f209 LR |
277 | if (avp->av_bslot > 0) { |
278 | u64 tsfadjust; | |
f078f209 LR |
279 | int intval; |
280 | ||
9814f6b3 | 281 | intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL; |
f078f209 LR |
282 | |
283 | /* | |
4ed96f04 JM |
284 | * Calculate the TSF offset for this beacon slot, i.e., the |
285 | * number of usecs that need to be added to the timestamp field | |
286 | * in Beacon and Probe Response frames. Beacon slot 0 is | |
287 | * processed at the correct offset, so it does not require TSF | |
288 | * adjustment. Other slots are adjusted to get the timestamp | |
289 | * close to the TBTT for the BSS. | |
f078f209 | 290 | */ |
dd347f2f FF |
291 | tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF; |
292 | avp->tsf_adjust = cpu_to_le64(tsfadjust); | |
f078f209 | 293 | |
226afe68 JP |
294 | ath_dbg(common, ATH_DBG_BEACON, |
295 | "stagger beacons, bslot %d intval %u tsfadjust %llu\n", | |
296 | avp->av_bslot, intval, (unsigned long long)tsfadjust); | |
f078f209 | 297 | |
4ed96f04 JM |
298 | ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp = |
299 | avp->tsf_adjust; | |
300 | } else | |
301 | avp->tsf_adjust = cpu_to_le64(0); | |
f078f209 | 302 | |
f8316df1 | 303 | bf->bf_mpdu = skb; |
c1739eb3 BG |
304 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
305 | skb->len, DMA_TO_DEVICE); | |
7da3c55c | 306 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
f8316df1 LR |
307 | dev_kfree_skb_any(skb); |
308 | bf->bf_mpdu = NULL; | |
6cf9e995 | 309 | bf->bf_buf_addr = 0; |
3800276a | 310 | ath_err(common, "dma_mapping_error on beacon alloc\n"); |
f8316df1 LR |
311 | return -ENOMEM; |
312 | } | |
014cf3bb | 313 | avp->is_bslot_active = true; |
f078f209 LR |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
17d7904d | 318 | void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp) |
f078f209 LR |
319 | { |
320 | if (avp->av_bcbuf != NULL) { | |
321 | struct ath_buf *bf; | |
322 | ||
323 | if (avp->av_bslot != -1) { | |
2c3db3d5 | 324 | sc->beacon.bslot[avp->av_bslot] = NULL; |
17d7904d | 325 | sc->nbcnvifs--; |
66da4241 | 326 | avp->av_bslot = -1; |
f078f209 LR |
327 | } |
328 | ||
329 | bf = avp->av_bcbuf; | |
330 | if (bf->bf_mpdu != NULL) { | |
a22be22a | 331 | struct sk_buff *skb = bf->bf_mpdu; |
c1739eb3 | 332 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
9fc9ab0a | 333 | skb->len, DMA_TO_DEVICE); |
f078f209 LR |
334 | dev_kfree_skb_any(skb); |
335 | bf->bf_mpdu = NULL; | |
6cf9e995 | 336 | bf->bf_buf_addr = 0; |
f078f209 | 337 | } |
b77f483f | 338 | list_add_tail(&bf->list, &sc->beacon.bbuf); |
f078f209 LR |
339 | |
340 | avp->av_bcbuf = NULL; | |
341 | } | |
342 | } | |
343 | ||
9fc9ab0a | 344 | void ath_beacon_tasklet(unsigned long data) |
f078f209 | 345 | { |
f078f209 | 346 | struct ath_softc *sc = (struct ath_softc *)data; |
9814f6b3 | 347 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
cbe61d8a | 348 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 349 | struct ath_common *common = ath9k_hw_common(ah); |
f078f209 | 350 | struct ath_buf *bf = NULL; |
2c3db3d5 JM |
351 | struct ieee80211_vif *vif; |
352 | int slot; | |
9546aae0 | 353 | u32 bfaddr, bc = 0, tsftu; |
f078f209 | 354 | u64 tsf; |
f078f209 LR |
355 | u16 intval; |
356 | ||
f078f209 LR |
357 | /* |
358 | * Check if the previous beacon has gone out. If | |
359 | * not don't try to post another, skip this period | |
360 | * and wait for the next. Missed beacons indicate | |
361 | * a problem and should not occur. If we miss too | |
362 | * many consecutive beacons reset the device. | |
363 | */ | |
b77f483f S |
364 | if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) { |
365 | sc->beacon.bmisscnt++; | |
9546aae0 | 366 | |
c944daf4 | 367 | if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) { |
226afe68 JP |
368 | ath_dbg(common, ATH_DBG_BSTUCK, |
369 | "missed %u consecutive beacons\n", | |
370 | sc->beacon.bmisscnt); | |
efff395e | 371 | ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq); |
87c510fe FF |
372 | if (sc->beacon.bmisscnt > 3) |
373 | ath9k_hw_bstuck_nfcal(ah); | |
b77f483f | 374 | } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) { |
226afe68 JP |
375 | ath_dbg(common, ATH_DBG_BSTUCK, |
376 | "beacon is officially stuck\n"); | |
b74444f8 | 377 | sc->sc_flags |= SC_OP_TSF_RESET; |
fac6b6a0 | 378 | ath_reset(sc, true); |
f078f209 | 379 | } |
9546aae0 | 380 | |
f078f209 LR |
381 | return; |
382 | } | |
980b24da | 383 | |
f078f209 LR |
384 | /* |
385 | * Generate beacon frames. we are sending frames | |
386 | * staggered so calculate the slot for this frame based | |
387 | * on the tsf to safeguard against missing an swba. | |
388 | */ | |
389 | ||
9814f6b3 | 390 | intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL; |
f078f209 LR |
391 | |
392 | tsf = ath9k_hw_gettsf64(ah); | |
dd347f2f FF |
393 | tsf += TU_TO_USEC(ah->config.sw_beacon_response_time); |
394 | tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF); | |
395 | slot = (tsftu % (intval * ATH_BCBUF)) / intval; | |
4ed96f04 | 396 | vif = sc->beacon.bslot[slot]; |
980b24da | 397 | |
226afe68 JP |
398 | ath_dbg(common, ATH_DBG_BEACON, |
399 | "slot %d [tsf %llu tsftu %u intval %u] vif %p\n", | |
dd347f2f | 400 | slot, tsf, tsftu / ATH_BCBUF, intval, vif); |
980b24da | 401 | |
f078f209 | 402 | bfaddr = 0; |
2c3db3d5 | 403 | if (vif) { |
7545daf4 | 404 | bf = ath_beacon_generate(sc->hw, vif); |
f078f209 LR |
405 | if (bf != NULL) { |
406 | bfaddr = bf->bf_daddr; | |
407 | bc = 1; | |
408 | } | |
c944daf4 FF |
409 | |
410 | if (sc->beacon.bmisscnt != 0) { | |
411 | ath_dbg(common, ATH_DBG_BSTUCK, | |
412 | "resume beacon xmit after %u misses\n", | |
413 | sc->beacon.bmisscnt); | |
414 | sc->beacon.bmisscnt = 0; | |
415 | } | |
f078f209 | 416 | } |
9546aae0 | 417 | |
f078f209 LR |
418 | /* |
419 | * Handle slot time change when a non-ERP station joins/leaves | |
420 | * an 11g network. The 802.11 layer notifies us via callback, | |
421 | * we mark updateslot, then wait one beacon before effecting | |
422 | * the change. This gives associated stations at least one | |
423 | * beacon interval to note the state change. | |
424 | * | |
425 | * NB: The slot time change state machine is clocked according | |
426 | * to whether we are bursting or staggering beacons. We | |
427 | * recognize the request to update and record the current | |
428 | * slot then don't transition until that slot is reached | |
429 | * again. If we miss a beacon for that slot then we'll be | |
430 | * slow to transition but we'll be sure at least one beacon | |
431 | * interval has passed. When bursting slot is always left | |
432 | * set to ATH_BCBUF so this check is a noop. | |
433 | */ | |
b77f483f S |
434 | if (sc->beacon.updateslot == UPDATE) { |
435 | sc->beacon.updateslot = COMMIT; /* commit next beacon */ | |
436 | sc->beacon.slotupdate = slot; | |
437 | } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) { | |
0005baf4 FF |
438 | ah->slottime = sc->beacon.slottime; |
439 | ath9k_hw_init_global_settings(ah); | |
b77f483f | 440 | sc->beacon.updateslot = OK; |
ff37e337 | 441 | } |
f078f209 | 442 | if (bfaddr != 0) { |
f078f209 | 443 | /* NB: cabq traffic should already be queued and primed */ |
b77f483f S |
444 | ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr); |
445 | ath9k_hw_txstart(ah, sc->beacon.beaconq); | |
f078f209 | 446 | |
17d7904d | 447 | sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */ |
f078f209 | 448 | } |
f078f209 LR |
449 | } |
450 | ||
21526d57 LR |
451 | static void ath9k_beacon_init(struct ath_softc *sc, |
452 | u32 next_beacon, | |
453 | u32 beacon_period) | |
454 | { | |
dd347f2f | 455 | if (sc->sc_flags & SC_OP_TSF_RESET) { |
21526d57 | 456 | ath9k_ps_wakeup(sc); |
dd347f2f FF |
457 | ath9k_hw_reset_tsf(sc->sc_ah); |
458 | } | |
21526d57 LR |
459 | |
460 | ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period); | |
461 | ||
dd347f2f | 462 | if (sc->sc_flags & SC_OP_TSF_RESET) { |
21526d57 | 463 | ath9k_ps_restore(sc); |
dd347f2f FF |
464 | sc->sc_flags &= ~SC_OP_TSF_RESET; |
465 | } | |
21526d57 LR |
466 | } |
467 | ||
f078f209 | 468 | /* |
5379c8a2 S |
469 | * For multi-bss ap support beacons are either staggered evenly over N slots or |
470 | * burst together. For the former arrange for the SWBA to be delivered for each | |
471 | * slot. Slots that are not occupied will generate nothing. | |
f078f209 | 472 | */ |
5379c8a2 | 473 | static void ath_beacon_config_ap(struct ath_softc *sc, |
d31e20af | 474 | struct ath_beacon_config *conf) |
f078f209 | 475 | { |
3069168c | 476 | struct ath_hw *ah = sc->sc_ah; |
980b24da | 477 | u32 nexttbtt, intval; |
f078f209 | 478 | |
5379c8a2 | 479 | /* NB: the beacon interval is kept internally in TU's */ |
dd347f2f | 480 | intval = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD); |
5379c8a2 S |
481 | intval /= ATH_BCBUF; /* for staggered beacons */ |
482 | nexttbtt = intval; | |
d8728ee9 | 483 | |
5379c8a2 S |
484 | /* |
485 | * In AP mode we enable the beacon timers and SWBA interrupts to | |
486 | * prepare beacon frames. | |
487 | */ | |
3069168c | 488 | ah->imask |= ATH9K_INT_SWBA; |
5379c8a2 | 489 | ath_beaconq_config(sc); |
f078f209 | 490 | |
5379c8a2 | 491 | /* Set the computed AP beacon timers */ |
f078f209 | 492 | |
4df3071e | 493 | ath9k_hw_disable_interrupts(ah); |
21526d57 | 494 | ath9k_beacon_init(sc, nexttbtt, intval); |
5379c8a2 | 495 | sc->beacon.bmisscnt = 0; |
3069168c | 496 | ath9k_hw_set_interrupts(ah, ah->imask); |
5379c8a2 | 497 | } |
459f5f90 | 498 | |
5379c8a2 S |
499 | /* |
500 | * This sets up the beacon timers according to the timestamp of the last | |
501 | * received beacon and the current TSF, configures PCF and DTIM | |
502 | * handling, programs the sleep registers so the hardware will wakeup in | |
503 | * time to receive beacons, and configures the beacon miss handling so | |
504 | * we'll receive a BMISS interrupt when we stop seeing beacons from the AP | |
505 | * we've associated with. | |
506 | */ | |
507 | static void ath_beacon_config_sta(struct ath_softc *sc, | |
d31e20af | 508 | struct ath_beacon_config *conf) |
5379c8a2 | 509 | { |
3069168c PR |
510 | struct ath_hw *ah = sc->sc_ah; |
511 | struct ath_common *common = ath9k_hw_common(ah); | |
5379c8a2 S |
512 | struct ath9k_beacon_state bs; |
513 | int dtimperiod, dtimcount, sleepduration; | |
514 | int cfpperiod, cfpcount; | |
515 | u32 nexttbtt = 0, intval, tsftu; | |
516 | u64 tsf; | |
267a9012 | 517 | int num_beacons, offset, dtim_dec_count, cfp_dec_count; |
5379c8a2 | 518 | |
1a20034a SB |
519 | /* No need to configure beacon if we are not associated */ |
520 | if (!common->curaid) { | |
226afe68 JP |
521 | ath_dbg(common, ATH_DBG_BEACON, |
522 | "STA is not yet associated..skipping beacon config\n"); | |
1a20034a SB |
523 | return; |
524 | } | |
525 | ||
5379c8a2 S |
526 | memset(&bs, 0, sizeof(bs)); |
527 | intval = conf->beacon_interval & ATH9K_BEACON_PERIOD; | |
528 | ||
529 | /* | |
530 | * Setup dtim and cfp parameters according to | |
531 | * last beacon we received (which may be none). | |
532 | */ | |
533 | dtimperiod = conf->dtim_period; | |
5379c8a2 S |
534 | dtimcount = conf->dtim_count; |
535 | if (dtimcount >= dtimperiod) /* NB: sanity check */ | |
536 | dtimcount = 0; | |
537 | cfpperiod = 1; /* NB: no PCF support yet */ | |
538 | cfpcount = 0; | |
539 | ||
540 | sleepduration = conf->listen_interval * intval; | |
5379c8a2 S |
541 | |
542 | /* | |
543 | * Pull nexttbtt forward to reflect the current | |
544 | * TSF and calculate dtim+cfp state for the result. | |
545 | */ | |
3069168c | 546 | tsf = ath9k_hw_gettsf64(ah); |
5379c8a2 | 547 | tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; |
267a9012 JM |
548 | |
549 | num_beacons = tsftu / intval + 1; | |
550 | offset = tsftu % intval; | |
551 | nexttbtt = tsftu - offset; | |
552 | if (offset) | |
5379c8a2 | 553 | nexttbtt += intval; |
267a9012 JM |
554 | |
555 | /* DTIM Beacon every dtimperiod Beacon */ | |
556 | dtim_dec_count = num_beacons % dtimperiod; | |
557 | /* CFP every cfpperiod DTIM Beacon */ | |
558 | cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod; | |
559 | if (dtim_dec_count) | |
560 | cfp_dec_count++; | |
561 | ||
562 | dtimcount -= dtim_dec_count; | |
563 | if (dtimcount < 0) | |
564 | dtimcount += dtimperiod; | |
565 | ||
566 | cfpcount -= cfp_dec_count; | |
567 | if (cfpcount < 0) | |
568 | cfpcount += cfpperiod; | |
5379c8a2 S |
569 | |
570 | bs.bs_intval = intval; | |
571 | bs.bs_nexttbtt = nexttbtt; | |
572 | bs.bs_dtimperiod = dtimperiod*intval; | |
573 | bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; | |
574 | bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; | |
575 | bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; | |
576 | bs.bs_cfpmaxduration = 0; | |
577 | ||
578 | /* | |
579 | * Calculate the number of consecutive beacons to miss* before taking | |
580 | * a BMISS interrupt. The configuration is specified in TU so we only | |
581 | * need calculate based on the beacon interval. Note that we clamp the | |
582 | * result to at most 15 beacons. | |
583 | */ | |
584 | if (sleepduration > intval) { | |
585 | bs.bs_bmissthreshold = conf->listen_interval * | |
586 | ATH_DEFAULT_BMISS_LIMIT / 2; | |
f078f209 | 587 | } else { |
5379c8a2 S |
588 | bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval); |
589 | if (bs.bs_bmissthreshold > 15) | |
590 | bs.bs_bmissthreshold = 15; | |
591 | else if (bs.bs_bmissthreshold <= 0) | |
592 | bs.bs_bmissthreshold = 1; | |
f078f209 LR |
593 | } |
594 | ||
5379c8a2 S |
595 | /* |
596 | * Calculate sleep duration. The configuration is given in ms. | |
597 | * We ensure a multiple of the beacon period is used. Also, if the sleep | |
598 | * duration is greater than the DTIM period then it makes senses | |
599 | * to make it a multiple of that. | |
600 | * | |
601 | * XXX fixed at 100ms | |
602 | */ | |
980b24da | 603 | |
5379c8a2 S |
604 | bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration); |
605 | if (bs.bs_sleepduration > bs.bs_dtimperiod) | |
606 | bs.bs_sleepduration = bs.bs_dtimperiod; | |
980b24da | 607 | |
5379c8a2 S |
608 | /* TSF out of range threshold fixed at 1 second */ |
609 | bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD; | |
f078f209 | 610 | |
226afe68 JP |
611 | ath_dbg(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu); |
612 | ath_dbg(common, ATH_DBG_BEACON, | |
613 | "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n", | |
614 | bs.bs_bmissthreshold, bs.bs_sleepduration, | |
615 | bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext); | |
f078f209 | 616 | |
5379c8a2 | 617 | /* Set the computed STA beacon timers */ |
980b24da | 618 | |
4df3071e | 619 | ath9k_hw_disable_interrupts(ah); |
3069168c PR |
620 | ath9k_hw_set_sta_beacon_timers(ah, &bs); |
621 | ah->imask |= ATH9K_INT_BMISS; | |
622 | ath9k_hw_set_interrupts(ah, ah->imask); | |
5379c8a2 | 623 | } |
f078f209 | 624 | |
5379c8a2 | 625 | static void ath_beacon_config_adhoc(struct ath_softc *sc, |
ee832d3e | 626 | struct ath_beacon_config *conf) |
5379c8a2 | 627 | { |
3069168c PR |
628 | struct ath_hw *ah = sc->sc_ah; |
629 | struct ath_common *common = ath9k_hw_common(ah); | |
dd347f2f FF |
630 | u32 tsf, delta, intval, nexttbtt; |
631 | ||
632 | tsf = ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE); | |
633 | intval = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD); | |
634 | ||
635 | if (!sc->beacon.bc_tstamp) | |
636 | nexttbtt = tsf + intval; | |
637 | else { | |
638 | if (tsf > sc->beacon.bc_tstamp) | |
639 | delta = (tsf - sc->beacon.bc_tstamp); | |
640 | else | |
641 | delta = (tsf + 1 + (~0U - sc->beacon.bc_tstamp)); | |
642 | nexttbtt = tsf + roundup(delta, intval); | |
643 | } | |
f078f209 | 644 | |
226afe68 JP |
645 | ath_dbg(common, ATH_DBG_BEACON, |
646 | "IBSS nexttbtt %u intval %u (%u)\n", | |
647 | nexttbtt, intval, conf->beacon_interval); | |
9fc9ab0a | 648 | |
5379c8a2 S |
649 | /* |
650 | * In IBSS mode enable the beacon timers but only enable SWBA interrupts | |
651 | * if we need to manually prepare beacon frames. Otherwise we use a | |
652 | * self-linked tx descriptor and let the hardware deal with things. | |
653 | */ | |
a65e4cb4 | 654 | ah->imask |= ATH9K_INT_SWBA; |
9fc9ab0a | 655 | |
5379c8a2 S |
656 | ath_beaconq_config(sc); |
657 | ||
658 | /* Set the computed ADHOC beacon timers */ | |
659 | ||
4df3071e | 660 | ath9k_hw_disable_interrupts(ah); |
21526d57 | 661 | ath9k_beacon_init(sc, nexttbtt, intval); |
5379c8a2 | 662 | sc->beacon.bmisscnt = 0; |
3069168c | 663 | ath9k_hw_set_interrupts(ah, ah->imask); |
f078f209 LR |
664 | } |
665 | ||
2c3db3d5 | 666 | void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif) |
f078f209 | 667 | { |
6b96f93e | 668 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
c46917bb | 669 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
6b96f93e | 670 | enum nl80211_iftype iftype; |
5379c8a2 S |
671 | |
672 | /* Setup the beacon configuration parameters */ | |
2c3db3d5 | 673 | if (vif) { |
6b96f93e | 674 | struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
6b96f93e | 675 | iftype = vif->type; |
6b96f93e VT |
676 | cur_conf->beacon_interval = bss_conf->beacon_int; |
677 | cur_conf->dtim_period = bss_conf->dtim_period; | |
ee832d3e MSS |
678 | } else { |
679 | iftype = sc->sc_ah->opmode; | |
680 | } | |
681 | ||
4801416c BG |
682 | cur_conf->listen_interval = 1; |
683 | cur_conf->dtim_count = 1; | |
684 | cur_conf->bmiss_timeout = | |
685 | ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval; | |
6b96f93e | 686 | |
c4f9f16b VT |
687 | /* |
688 | * It looks like mac80211 may end up using beacon interval of zero in | |
689 | * some cases (at least for mesh point). Avoid getting into an | |
690 | * infinite loop by using a bit safer value instead. To be safe, | |
691 | * do sanity check on beacon interval for all operating modes. | |
692 | */ | |
693 | if (cur_conf->beacon_interval == 0) | |
694 | cur_conf->beacon_interval = 100; | |
6b96f93e | 695 | |
ee832d3e | 696 | /* |
3a2329f2 MSS |
697 | * We don't parse dtim period from mac80211 during the driver |
698 | * initialization as it breaks association with hidden-ssid | |
699 | * AP and it causes latency in roaming | |
ee832d3e MSS |
700 | */ |
701 | if (cur_conf->dtim_period == 0) | |
702 | cur_conf->dtim_period = 1; | |
703 | ||
26cd322b | 704 | switch (sc->sc_ah->opmode) { |
6b96f93e VT |
705 | case NL80211_IFTYPE_AP: |
706 | ath_beacon_config_ap(sc, cur_conf); | |
707 | break; | |
708 | case NL80211_IFTYPE_ADHOC: | |
709 | case NL80211_IFTYPE_MESH_POINT: | |
ee832d3e | 710 | ath_beacon_config_adhoc(sc, cur_conf); |
6b96f93e VT |
711 | break; |
712 | case NL80211_IFTYPE_STATION: | |
713 | ath_beacon_config_sta(sc, cur_conf); | |
714 | break; | |
715 | default: | |
226afe68 JP |
716 | ath_dbg(common, ATH_DBG_CONFIG, |
717 | "Unsupported beaconing mode\n"); | |
6b96f93e VT |
718 | return; |
719 | } | |
720 | ||
721 | sc->sc_flags |= SC_OP_BEACONS; | |
f078f209 | 722 | } |
014cf3bb RM |
723 | |
724 | void ath9k_set_beaconing_status(struct ath_softc *sc, bool status) | |
725 | { | |
726 | struct ath_hw *ah = sc->sc_ah; | |
727 | struct ath_vif *avp; | |
728 | int slot; | |
729 | bool found = false; | |
730 | ||
731 | ath9k_ps_wakeup(sc); | |
732 | if (status) { | |
733 | for (slot = 0; slot < ATH_BCBUF; slot++) { | |
734 | if (sc->beacon.bslot[slot]) { | |
735 | avp = (void *)sc->beacon.bslot[slot]->drv_priv; | |
736 | if (avp->is_bslot_active) { | |
737 | found = true; | |
738 | break; | |
739 | } | |
740 | } | |
741 | } | |
742 | if (found) { | |
743 | /* Re-enable beaconing */ | |
744 | ah->imask |= ATH9K_INT_SWBA; | |
745 | ath9k_hw_set_interrupts(ah, ah->imask); | |
746 | } | |
747 | } else { | |
748 | /* Disable SWBA interrupt */ | |
749 | ah->imask &= ~ATH9K_INT_SWBA; | |
750 | ath9k_hw_set_interrupts(ah, ah->imask); | |
751 | tasklet_kill(&sc->bcon_tasklet); | |
efff395e | 752 | ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq); |
014cf3bb RM |
753 | } |
754 | ath9k_ps_restore(sc); | |
755 | } |