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 | |
2660b81a | 42 | if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { |
f078f209 LR |
43 | /* Always burst out beacon and CAB traffic. */ |
44 | qi.tqi_aifs = 1; | |
45 | qi.tqi_cwmin = 0; | |
46 | qi.tqi_cwmax = 0; | |
47 | } else { | |
48 | /* Adhoc mode; important thing is to use 2x cwmin. */ | |
066dae93 FF |
49 | txq = sc->tx.txq_map[WME_AC_BE]; |
50 | ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be); | |
94db2936 | 51 | qi.tqi_aifs = qi_be.tqi_aifs; |
d202caff VN |
52 | if (ah->slottime == ATH9K_SLOT_TIME_20) |
53 | qi.tqi_cwmin = 2*qi_be.tqi_cwmin; | |
54 | else | |
55 | qi.tqi_cwmin = 4*qi_be.tqi_cwmin; | |
94db2936 | 56 | qi.tqi_cwmax = qi_be.tqi_cwmax; |
f078f209 LR |
57 | } |
58 | ||
b77f483f | 59 | if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) { |
7e52c8aa | 60 | ath_err(common, "Unable to update h/w beacon queue parameters\n"); |
f078f209 | 61 | } else { |
9fc9ab0a | 62 | ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); |
f078f209 LR |
63 | } |
64 | } | |
65 | ||
66 | /* | |
f078f209 | 67 | * Associates the beacon frame buffer with a transmit descriptor. Will set |
dd347f2f FF |
68 | * up rate codes, and channel flags. Beacons are always sent out at the |
69 | * lowest rate, and are not retried. | |
f078f209 | 70 | */ |
d47a61aa | 71 | static void ath_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif, |
64b84010 | 72 | struct ath_buf *bf, int rateidx) |
f078f209 | 73 | { |
a22be22a | 74 | struct sk_buff *skb = bf->bf_mpdu; |
cbe61d8a | 75 | struct ath_hw *ah = sc->sc_ah; |
43c27613 | 76 | struct ath_common *common = ath9k_hw_common(ah); |
493cf04f | 77 | struct ath_tx_info info; |
545750d3 | 78 | struct ieee80211_supported_band *sband; |
493cf04f | 79 | u8 chainmask = ah->txchainmask; |
545750d3 | 80 | u8 rate = 0; |
f078f209 | 81 | |
ba4903f9 FF |
82 | ath9k_reset_beacon_status(sc); |
83 | ||
545750d3 | 84 | sband = &sc->sbands[common->hw->conf.channel->band]; |
64b84010 | 85 | rate = sband->bitrates[rateidx].hw_value; |
d47a61aa | 86 | if (vif->bss_conf.use_short_preamble) |
64b84010 | 87 | rate |= sband->bitrates[rateidx].hw_value_short; |
9fc9ab0a | 88 | |
493cf04f FF |
89 | memset(&info, 0, sizeof(info)); |
90 | info.pkt_len = skb->len + FCS_LEN; | |
91 | info.type = ATH9K_PKT_TYPE_BEACON; | |
92 | info.txpower = MAX_RATE_POWER; | |
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 | ||
28d16708 FF |
112 | static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
113 | { | |
9ac58615 | 114 | struct ath_softc *sc = hw->priv; |
28d16708 FF |
115 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
116 | struct ath_tx_control txctl; | |
117 | ||
118 | memset(&txctl, 0, sizeof(struct ath_tx_control)); | |
119 | txctl.txq = sc->beacon.cabq; | |
120 | ||
d2182b69 | 121 | ath_dbg(common, XMIT, "transmitting CABQ packet, skb: %p\n", skb); |
28d16708 FF |
122 | |
123 | if (ath_tx_start(hw, skb, &txctl) != 0) { | |
d2182b69 | 124 | ath_dbg(common, XMIT, "CABQ TX failed\n"); |
28d16708 FF |
125 | dev_kfree_skb_any(skb); |
126 | } | |
127 | } | |
128 | ||
c52f33d0 | 129 | static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw, |
2c3db3d5 | 130 | struct ieee80211_vif *vif) |
f078f209 | 131 | { |
9ac58615 | 132 | struct ath_softc *sc = hw->priv; |
c46917bb | 133 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
f078f209 | 134 | struct ath_buf *bf; |
aa45fe96 | 135 | struct ath_vif *avp = (void *)vif->drv_priv; |
f078f209 | 136 | struct sk_buff *skb; |
aa45fe96 | 137 | struct ath_txq *cabq = sc->beacon.cabq; |
147583c0 | 138 | struct ieee80211_tx_info *info; |
980b24da S |
139 | int cabq_depth; |
140 | ||
aa45fe96 | 141 | if (avp->av_bcbuf == NULL) |
f078f209 | 142 | return NULL; |
980b24da | 143 | |
aa45fe96 SM |
144 | ath9k_reset_beacon_status(sc); |
145 | ||
9fc9ab0a S |
146 | /* Release the old beacon first */ |
147 | ||
f078f209 | 148 | bf = avp->av_bcbuf; |
a22be22a | 149 | skb = bf->bf_mpdu; |
a8fff50e | 150 | if (skb) { |
c1739eb3 | 151 | dma_unmap_single(sc->dev, bf->bf_buf_addr, |
9fc9ab0a | 152 | skb->len, DMA_TO_DEVICE); |
3fbb9d95 | 153 | dev_kfree_skb_any(skb); |
6cf9e995 | 154 | bf->bf_buf_addr = 0; |
a8fff50e | 155 | } |
f078f209 | 156 | |
9fc9ab0a S |
157 | /* Get a new beacon from mac80211 */ |
158 | ||
c52f33d0 | 159 | skb = ieee80211_beacon_get(hw, vif); |
a8fff50e JM |
160 | bf->bf_mpdu = skb; |
161 | if (skb == NULL) | |
162 | return NULL; | |
4ed96f04 JM |
163 | ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp = |
164 | avp->tsf_adjust; | |
980b24da | 165 | |
147583c0 JM |
166 | info = IEEE80211_SKB_CB(skb); |
167 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { | |
168 | /* | |
169 | * TODO: make sure the seq# gets assigned properly (vs. other | |
170 | * TX frames) | |
171 | */ | |
980b24da | 172 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
b77f483f | 173 | sc->tx.seq_no += 0x10; |
147583c0 | 174 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
b77f483f | 175 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
147583c0 | 176 | } |
980b24da | 177 | |
c1739eb3 BG |
178 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
179 | skb->len, DMA_TO_DEVICE); | |
7da3c55c | 180 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
f8316df1 LR |
181 | dev_kfree_skb_any(skb); |
182 | bf->bf_mpdu = NULL; | |
6cf9e995 | 183 | bf->bf_buf_addr = 0; |
3800276a | 184 | ath_err(common, "dma_mapping_error on beaconing\n"); |
f8316df1 LR |
185 | return NULL; |
186 | } | |
f078f209 | 187 | |
c52f33d0 | 188 | skb = ieee80211_get_buffered_bc(hw, vif); |
f078f209 | 189 | |
f078f209 LR |
190 | /* |
191 | * if the CABQ traffic from previous DTIM is pending and the current | |
192 | * beacon is also a DTIM. | |
17d7904d S |
193 | * 1) if there is only one vif let the cab traffic continue. |
194 | * 2) if there are more than one vif and we are using staggered | |
f078f209 | 195 | * beacons, then drain the cabq by dropping all the frames in |
17d7904d | 196 | * the cabq so that the current vifs cab traffic can be scheduled. |
f078f209 LR |
197 | */ |
198 | spin_lock_bh(&cabq->axq_lock); | |
199 | cabq_depth = cabq->axq_depth; | |
200 | spin_unlock_bh(&cabq->axq_lock); | |
201 | ||
e022edbd | 202 | if (skb && cabq_depth) { |
17d7904d | 203 | if (sc->nvifs > 1) { |
d2182b69 | 204 | ath_dbg(common, BEACON, |
226afe68 | 205 | "Flushing previous cabq traffic\n"); |
9fc9ab0a | 206 | ath_draintxq(sc, cabq, false); |
f078f209 LR |
207 | } |
208 | } | |
209 | ||
d47a61aa | 210 | ath_beacon_setup(sc, vif, bf, info->control.rates[0].idx); |
f078f209 | 211 | |
e022edbd | 212 | while (skb) { |
c52f33d0 JM |
213 | ath_tx_cabq(hw, skb); |
214 | skb = ieee80211_get_buffered_bc(hw, vif); | |
e022edbd | 215 | } |
f078f209 | 216 | |
f078f209 LR |
217 | return bf; |
218 | } | |
219 | ||
130ef6e9 | 220 | void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif) |
f078f209 | 221 | { |
c46917bb | 222 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
130ef6e9 SM |
223 | struct ath_vif *avp = (void *)vif->drv_priv; |
224 | int slot; | |
f078f209 | 225 | |
130ef6e9 SM |
226 | avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list); |
227 | list_del(&avp->av_bcbuf->list); | |
f078f209 | 228 | |
130ef6e9 SM |
229 | for (slot = 0; slot < ATH_BCBUF; slot++) { |
230 | if (sc->beacon.bslot[slot] == NULL) { | |
231 | avp->av_bslot = slot; | |
130ef6e9 | 232 | break; |
f078f209 LR |
233 | } |
234 | } | |
235 | ||
130ef6e9 SM |
236 | sc->beacon.bslot[avp->av_bslot] = vif; |
237 | sc->nbcnvifs++; | |
f078f209 | 238 | |
130ef6e9 SM |
239 | ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n", |
240 | avp->av_bslot); | |
241 | } | |
f078f209 | 242 | |
130ef6e9 SM |
243 | void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif) |
244 | { | |
245 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
246 | struct ath_vif *avp = (void *)vif->drv_priv; | |
247 | struct ath_buf *bf = avp->av_bcbuf; | |
f078f209 | 248 | |
130ef6e9 SM |
249 | ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n", |
250 | avp->av_bslot); | |
f078f209 | 251 | |
130ef6e9 | 252 | tasklet_disable(&sc->bcon_tasklet); |
f078f209 | 253 | |
130ef6e9 SM |
254 | if (bf && bf->bf_mpdu) { |
255 | struct sk_buff *skb = bf->bf_mpdu; | |
256 | dma_unmap_single(sc->dev, bf->bf_buf_addr, | |
257 | skb->len, DMA_TO_DEVICE); | |
f8316df1 LR |
258 | dev_kfree_skb_any(skb); |
259 | bf->bf_mpdu = NULL; | |
6cf9e995 | 260 | bf->bf_buf_addr = 0; |
f8316df1 | 261 | } |
f078f209 | 262 | |
130ef6e9 | 263 | avp->av_bcbuf = NULL; |
130ef6e9 SM |
264 | sc->beacon.bslot[avp->av_bslot] = NULL; |
265 | sc->nbcnvifs--; | |
266 | list_add_tail(&bf->list, &sc->beacon.bbuf); | |
f078f209 | 267 | |
130ef6e9 | 268 | tasklet_enable(&sc->bcon_tasklet); |
f078f209 LR |
269 | } |
270 | ||
9fc9ab0a | 271 | void ath_beacon_tasklet(unsigned long data) |
f078f209 | 272 | { |
f078f209 | 273 | struct ath_softc *sc = (struct ath_softc *)data; |
9814f6b3 | 274 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
cbe61d8a | 275 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 276 | struct ath_common *common = ath9k_hw_common(ah); |
f078f209 | 277 | struct ath_buf *bf = NULL; |
2c3db3d5 | 278 | struct ieee80211_vif *vif; |
98f0a5eb | 279 | bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); |
2c3db3d5 | 280 | int slot; |
c6820f1e | 281 | u32 bfaddr, bc = 0; |
f078f209 | 282 | |
4e7fb718 RM |
283 | if (work_pending(&sc->hw_reset_work)) { |
284 | ath_dbg(common, RESET, | |
285 | "reset work is pending, skip beaconing now\n"); | |
286 | return; | |
287 | } | |
f078f209 LR |
288 | /* |
289 | * Check if the previous beacon has gone out. If | |
290 | * not don't try to post another, skip this period | |
291 | * and wait for the next. Missed beacons indicate | |
292 | * a problem and should not occur. If we miss too | |
293 | * many consecutive beacons reset the device. | |
294 | */ | |
b77f483f S |
295 | if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) { |
296 | sc->beacon.bmisscnt++; | |
9546aae0 | 297 | |
b381fa32 FF |
298 | if (!ath9k_hw_check_alive(ah)) |
299 | ieee80211_queue_work(sc->hw, &sc->hw_check_work); | |
300 | ||
c944daf4 | 301 | if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) { |
d2182b69 | 302 | ath_dbg(common, BSTUCK, |
226afe68 JP |
303 | "missed %u consecutive beacons\n", |
304 | sc->beacon.bmisscnt); | |
efff395e | 305 | ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq); |
87c510fe FF |
306 | if (sc->beacon.bmisscnt > 3) |
307 | ath9k_hw_bstuck_nfcal(ah); | |
b77f483f | 308 | } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) { |
d2182b69 | 309 | ath_dbg(common, BSTUCK, "beacon is officially stuck\n"); |
4e7fb718 | 310 | sc->beacon.bmisscnt = 0; |
236de514 | 311 | ieee80211_queue_work(sc->hw, &sc->hw_reset_work); |
f078f209 | 312 | } |
9546aae0 | 313 | |
f078f209 LR |
314 | return; |
315 | } | |
980b24da | 316 | |
f078f209 LR |
317 | /* |
318 | * Generate beacon frames. we are sending frames | |
319 | * staggered so calculate the slot for this frame based | |
320 | * on the tsf to safeguard against missing an swba. | |
321 | */ | |
322 | ||
f078f209 | 323 | |
c6820f1e FF |
324 | if (ah->opmode == NL80211_IFTYPE_AP) { |
325 | u16 intval; | |
326 | u32 tsftu; | |
327 | u64 tsf; | |
328 | ||
329 | intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL; | |
330 | tsf = ath9k_hw_gettsf64(ah); | |
331 | tsf += TU_TO_USEC(ah->config.sw_beacon_response_time); | |
332 | tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF); | |
333 | slot = (tsftu % (intval * ATH_BCBUF)) / intval; | |
334 | vif = sc->beacon.bslot[slot]; | |
335 | ||
d2182b69 | 336 | ath_dbg(common, BEACON, |
c6820f1e FF |
337 | "slot %d [tsf %llu tsftu %u intval %u] vif %p\n", |
338 | slot, tsf, tsftu / ATH_BCBUF, intval, vif); | |
339 | } else { | |
340 | slot = 0; | |
341 | vif = sc->beacon.bslot[slot]; | |
342 | } | |
980b24da | 343 | |
980b24da | 344 | |
f078f209 | 345 | bfaddr = 0; |
2c3db3d5 | 346 | if (vif) { |
7545daf4 | 347 | bf = ath_beacon_generate(sc->hw, vif); |
f078f209 LR |
348 | if (bf != NULL) { |
349 | bfaddr = bf->bf_daddr; | |
350 | bc = 1; | |
351 | } | |
c944daf4 FF |
352 | |
353 | if (sc->beacon.bmisscnt != 0) { | |
d2182b69 | 354 | ath_dbg(common, BSTUCK, |
c944daf4 FF |
355 | "resume beacon xmit after %u misses\n", |
356 | sc->beacon.bmisscnt); | |
357 | sc->beacon.bmisscnt = 0; | |
358 | } | |
f078f209 | 359 | } |
9546aae0 | 360 | |
f078f209 LR |
361 | /* |
362 | * Handle slot time change when a non-ERP station joins/leaves | |
363 | * an 11g network. The 802.11 layer notifies us via callback, | |
364 | * we mark updateslot, then wait one beacon before effecting | |
365 | * the change. This gives associated stations at least one | |
366 | * beacon interval to note the state change. | |
367 | * | |
368 | * NB: The slot time change state machine is clocked according | |
369 | * to whether we are bursting or staggering beacons. We | |
370 | * recognize the request to update and record the current | |
371 | * slot then don't transition until that slot is reached | |
372 | * again. If we miss a beacon for that slot then we'll be | |
373 | * slow to transition but we'll be sure at least one beacon | |
374 | * interval has passed. When bursting slot is always left | |
375 | * set to ATH_BCBUF so this check is a noop. | |
376 | */ | |
b77f483f S |
377 | if (sc->beacon.updateslot == UPDATE) { |
378 | sc->beacon.updateslot = COMMIT; /* commit next beacon */ | |
379 | sc->beacon.slotupdate = slot; | |
380 | } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) { | |
0005baf4 FF |
381 | ah->slottime = sc->beacon.slottime; |
382 | ath9k_hw_init_global_settings(ah); | |
b77f483f | 383 | sc->beacon.updateslot = OK; |
ff37e337 | 384 | } |
f078f209 | 385 | if (bfaddr != 0) { |
f078f209 | 386 | /* NB: cabq traffic should already be queued and primed */ |
b77f483f | 387 | ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr); |
98f0a5eb MSS |
388 | |
389 | if (!edma) | |
390 | ath9k_hw_txstart(ah, sc->beacon.beaconq); | |
f078f209 | 391 | |
17d7904d | 392 | sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */ |
f078f209 | 393 | } |
f078f209 LR |
394 | } |
395 | ||
ef4ad633 | 396 | static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt, u32 intval) |
21526d57 | 397 | { |
ef4ad633 | 398 | struct ath_hw *ah = sc->sc_ah; |
21526d57 | 399 | |
ef4ad633 SM |
400 | ath9k_hw_disable_interrupts(ah); |
401 | ath9k_hw_reset_tsf(ah); | |
7e52c8aa | 402 | ath9k_beaconq_config(sc); |
ef4ad633 SM |
403 | ath9k_hw_beaconinit(ah, nexttbtt, intval); |
404 | sc->beacon.bmisscnt = 0; | |
405 | ath9k_hw_set_interrupts(ah); | |
406 | ath9k_hw_enable_interrupts(ah); | |
21526d57 LR |
407 | } |
408 | ||
f078f209 | 409 | /* |
5379c8a2 S |
410 | * For multi-bss ap support beacons are either staggered evenly over N slots or |
411 | * burst together. For the former arrange for the SWBA to be delivered for each | |
412 | * slot. Slots that are not occupied will generate nothing. | |
f078f209 | 413 | */ |
ef4ad633 SM |
414 | static void ath9k_beacon_config_ap(struct ath_softc *sc, |
415 | struct ath_beacon_config *conf) | |
f078f209 | 416 | { |
3069168c | 417 | struct ath_hw *ah = sc->sc_ah; |
ef4ad633 | 418 | struct ath_common *common = ath9k_hw_common(ah); |
980b24da | 419 | u32 nexttbtt, intval; |
f078f209 | 420 | |
5379c8a2 | 421 | /* NB: the beacon interval is kept internally in TU's */ |
f29f5c08 | 422 | intval = TU_TO_USEC(conf->beacon_interval); |
ef4ad633 | 423 | intval /= ATH_BCBUF; |
5379c8a2 | 424 | nexttbtt = intval; |
d8728ee9 | 425 | |
ef4ad633 SM |
426 | if (conf->enable_beacon) |
427 | ah->imask |= ATH9K_INT_SWBA; | |
428 | else | |
429 | ah->imask &= ~ATH9K_INT_SWBA; | |
f078f209 | 430 | |
ef4ad633 SM |
431 | ath_dbg(common, BEACON, "AP nexttbtt: %u intval: %u conf_intval: %u\n", |
432 | nexttbtt, intval, conf->beacon_interval); | |
f078f209 | 433 | |
21526d57 | 434 | ath9k_beacon_init(sc, nexttbtt, intval); |
5379c8a2 | 435 | } |
459f5f90 | 436 | |
5379c8a2 S |
437 | /* |
438 | * This sets up the beacon timers according to the timestamp of the last | |
439 | * received beacon and the current TSF, configures PCF and DTIM | |
440 | * handling, programs the sleep registers so the hardware will wakeup in | |
441 | * time to receive beacons, and configures the beacon miss handling so | |
442 | * we'll receive a BMISS interrupt when we stop seeing beacons from the AP | |
443 | * we've associated with. | |
444 | */ | |
ef4ad633 SM |
445 | static void ath9k_beacon_config_sta(struct ath_softc *sc, |
446 | struct ath_beacon_config *conf) | |
5379c8a2 | 447 | { |
3069168c PR |
448 | struct ath_hw *ah = sc->sc_ah; |
449 | struct ath_common *common = ath9k_hw_common(ah); | |
5379c8a2 S |
450 | struct ath9k_beacon_state bs; |
451 | int dtimperiod, dtimcount, sleepduration; | |
452 | int cfpperiod, cfpcount; | |
453 | u32 nexttbtt = 0, intval, tsftu; | |
454 | u64 tsf; | |
267a9012 | 455 | int num_beacons, offset, dtim_dec_count, cfp_dec_count; |
5379c8a2 | 456 | |
1a20034a | 457 | /* No need to configure beacon if we are not associated */ |
6c43c090 | 458 | if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) { |
d2182b69 | 459 | ath_dbg(common, BEACON, |
226afe68 | 460 | "STA is not yet associated..skipping beacon config\n"); |
1a20034a SB |
461 | return; |
462 | } | |
463 | ||
5379c8a2 | 464 | memset(&bs, 0, sizeof(bs)); |
f29f5c08 | 465 | intval = conf->beacon_interval; |
5379c8a2 S |
466 | |
467 | /* | |
468 | * Setup dtim and cfp parameters according to | |
469 | * last beacon we received (which may be none). | |
470 | */ | |
471 | dtimperiod = conf->dtim_period; | |
5379c8a2 S |
472 | dtimcount = conf->dtim_count; |
473 | if (dtimcount >= dtimperiod) /* NB: sanity check */ | |
474 | dtimcount = 0; | |
475 | cfpperiod = 1; /* NB: no PCF support yet */ | |
476 | cfpcount = 0; | |
477 | ||
478 | sleepduration = conf->listen_interval * intval; | |
5379c8a2 S |
479 | |
480 | /* | |
481 | * Pull nexttbtt forward to reflect the current | |
482 | * TSF and calculate dtim+cfp state for the result. | |
483 | */ | |
3069168c | 484 | tsf = ath9k_hw_gettsf64(ah); |
5379c8a2 | 485 | tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; |
267a9012 JM |
486 | |
487 | num_beacons = tsftu / intval + 1; | |
488 | offset = tsftu % intval; | |
489 | nexttbtt = tsftu - offset; | |
490 | if (offset) | |
5379c8a2 | 491 | nexttbtt += intval; |
267a9012 JM |
492 | |
493 | /* DTIM Beacon every dtimperiod Beacon */ | |
494 | dtim_dec_count = num_beacons % dtimperiod; | |
495 | /* CFP every cfpperiod DTIM Beacon */ | |
496 | cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod; | |
497 | if (dtim_dec_count) | |
498 | cfp_dec_count++; | |
499 | ||
500 | dtimcount -= dtim_dec_count; | |
501 | if (dtimcount < 0) | |
502 | dtimcount += dtimperiod; | |
503 | ||
504 | cfpcount -= cfp_dec_count; | |
505 | if (cfpcount < 0) | |
506 | cfpcount += cfpperiod; | |
5379c8a2 S |
507 | |
508 | bs.bs_intval = intval; | |
509 | bs.bs_nexttbtt = nexttbtt; | |
510 | bs.bs_dtimperiod = dtimperiod*intval; | |
511 | bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; | |
512 | bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; | |
513 | bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; | |
514 | bs.bs_cfpmaxduration = 0; | |
515 | ||
516 | /* | |
517 | * Calculate the number of consecutive beacons to miss* before taking | |
518 | * a BMISS interrupt. The configuration is specified in TU so we only | |
519 | * need calculate based on the beacon interval. Note that we clamp the | |
520 | * result to at most 15 beacons. | |
521 | */ | |
522 | if (sleepduration > intval) { | |
523 | bs.bs_bmissthreshold = conf->listen_interval * | |
524 | ATH_DEFAULT_BMISS_LIMIT / 2; | |
f078f209 | 525 | } else { |
5379c8a2 S |
526 | bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval); |
527 | if (bs.bs_bmissthreshold > 15) | |
528 | bs.bs_bmissthreshold = 15; | |
529 | else if (bs.bs_bmissthreshold <= 0) | |
530 | bs.bs_bmissthreshold = 1; | |
f078f209 LR |
531 | } |
532 | ||
5379c8a2 S |
533 | /* |
534 | * Calculate sleep duration. The configuration is given in ms. | |
535 | * We ensure a multiple of the beacon period is used. Also, if the sleep | |
536 | * duration is greater than the DTIM period then it makes senses | |
537 | * to make it a multiple of that. | |
538 | * | |
539 | * XXX fixed at 100ms | |
540 | */ | |
980b24da | 541 | |
5379c8a2 S |
542 | bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration); |
543 | if (bs.bs_sleepduration > bs.bs_dtimperiod) | |
544 | bs.bs_sleepduration = bs.bs_dtimperiod; | |
980b24da | 545 | |
5379c8a2 S |
546 | /* TSF out of range threshold fixed at 1 second */ |
547 | bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD; | |
f078f209 | 548 | |
d2182b69 JP |
549 | ath_dbg(common, BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu); |
550 | ath_dbg(common, BEACON, | |
226afe68 JP |
551 | "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n", |
552 | bs.bs_bmissthreshold, bs.bs_sleepduration, | |
553 | bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext); | |
f078f209 | 554 | |
5379c8a2 | 555 | /* Set the computed STA beacon timers */ |
980b24da | 556 | |
4df3071e | 557 | ath9k_hw_disable_interrupts(ah); |
3069168c PR |
558 | ath9k_hw_set_sta_beacon_timers(ah, &bs); |
559 | ah->imask |= ATH9K_INT_BMISS; | |
deb75188 | 560 | |
72d874c6 | 561 | ath9k_hw_set_interrupts(ah); |
e8fe7336 | 562 | ath9k_hw_enable_interrupts(ah); |
5379c8a2 | 563 | } |
f078f209 | 564 | |
ef4ad633 SM |
565 | static void ath9k_beacon_config_adhoc(struct ath_softc *sc, |
566 | struct ath_beacon_config *conf) | |
5379c8a2 | 567 | { |
3069168c PR |
568 | struct ath_hw *ah = sc->sc_ah; |
569 | struct ath_common *common = ath9k_hw_common(ah); | |
ef4ad633 | 570 | u32 intval, nexttbtt; |
dd347f2f | 571 | |
ba4903f9 FF |
572 | ath9k_reset_beacon_status(sc); |
573 | ||
f29f5c08 | 574 | intval = TU_TO_USEC(conf->beacon_interval); |
ef4ad633 | 575 | nexttbtt = intval; |
f078f209 | 576 | |
ef4ad633 SM |
577 | if (conf->enable_beacon) |
578 | ah->imask |= ATH9K_INT_SWBA; | |
579 | else | |
580 | ah->imask &= ~ATH9K_INT_SWBA; | |
9fc9ab0a | 581 | |
ef4ad633 SM |
582 | ath_dbg(common, BEACON, "IBSS nexttbtt: %u intval: %u conf_intval: %u\n", |
583 | nexttbtt, intval, conf->beacon_interval); | |
9fc9ab0a | 584 | |
21526d57 | 585 | ath9k_beacon_init(sc, nexttbtt, intval); |
f078f209 LR |
586 | } |
587 | ||
ef4ad633 | 588 | bool ath9k_allow_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif) |
f078f209 | 589 | { |
c46917bb | 590 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
99e4d43a | 591 | struct ath_vif *avp = (void *)vif->drv_priv; |
5379c8a2 | 592 | |
ef4ad633 SM |
593 | if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { |
594 | if ((vif->type != NL80211_IFTYPE_AP) || | |
595 | (sc->nbcnvifs > 1)) { | |
596 | ath_dbg(common, CONFIG, | |
597 | "An AP interface is already present !\n"); | |
598 | return false; | |
599 | } | |
99e4d43a | 600 | } |
ef4ad633 SM |
601 | |
602 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) { | |
603 | if ((vif->type == NL80211_IFTYPE_STATION) && | |
604 | test_bit(SC_OP_BEACONS, &sc->sc_flags) && | |
605 | !avp->primary_sta_vif) { | |
606 | ath_dbg(common, CONFIG, | |
607 | "Beacon already configured for a station interface\n"); | |
608 | return false; | |
609 | } | |
ee832d3e | 610 | } |
ef4ad633 | 611 | |
99e4d43a RM |
612 | return true; |
613 | } | |
614 | ||
ef4ad633 SM |
615 | static void ath9k_cache_beacon_config(struct ath_softc *sc, |
616 | struct ieee80211_bss_conf *bss_conf) | |
99e4d43a | 617 | { |
ef4ad633 | 618 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
99e4d43a | 619 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
ee832d3e | 620 | |
ef4ad633 SM |
621 | ath_dbg(common, BEACON, |
622 | "Caching beacon data for BSS: %pM\n", bss_conf->bssid); | |
99e4d43a | 623 | |
99e4d43a RM |
624 | cur_conf->beacon_interval = bss_conf->beacon_int; |
625 | cur_conf->dtim_period = bss_conf->dtim_period; | |
4801416c BG |
626 | cur_conf->listen_interval = 1; |
627 | cur_conf->dtim_count = 1; | |
628 | cur_conf->bmiss_timeout = | |
629 | ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval; | |
6b96f93e | 630 | |
c4f9f16b VT |
631 | /* |
632 | * It looks like mac80211 may end up using beacon interval of zero in | |
633 | * some cases (at least for mesh point). Avoid getting into an | |
634 | * infinite loop by using a bit safer value instead. To be safe, | |
635 | * do sanity check on beacon interval for all operating modes. | |
636 | */ | |
637 | if (cur_conf->beacon_interval == 0) | |
638 | cur_conf->beacon_interval = 100; | |
6b96f93e | 639 | |
ee832d3e | 640 | /* |
3a2329f2 MSS |
641 | * We don't parse dtim period from mac80211 during the driver |
642 | * initialization as it breaks association with hidden-ssid | |
643 | * AP and it causes latency in roaming | |
ee832d3e MSS |
644 | */ |
645 | if (cur_conf->dtim_period == 0) | |
646 | cur_conf->dtim_period = 1; | |
647 | ||
99e4d43a RM |
648 | } |
649 | ||
ef4ad633 SM |
650 | void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif, |
651 | u32 changed) | |
8e22ad32 | 652 | { |
ef4ad633 SM |
653 | struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
654 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; | |
8e22ad32 | 655 | |
ef4ad633 SM |
656 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) { |
657 | ath9k_cache_beacon_config(sc, bss_conf); | |
658 | ath9k_set_beacon(sc); | |
659 | set_bit(SC_OP_BEACONS, &sc->sc_flags); | |
660 | } else { | |
661 | /* | |
662 | * Take care of multiple interfaces when | |
663 | * enabling/disabling SWBA. | |
664 | */ | |
665 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
666 | if (!bss_conf->enable_beacon && | |
667 | (sc->nbcnvifs <= 1)) { | |
668 | cur_conf->enable_beacon = false; | |
669 | } else if (bss_conf->enable_beacon) { | |
670 | cur_conf->enable_beacon = true; | |
671 | ath9k_cache_beacon_config(sc, bss_conf); | |
8e22ad32 RM |
672 | } |
673 | } | |
ef4ad633 SM |
674 | |
675 | if (cur_conf->beacon_interval) { | |
676 | ath9k_set_beacon(sc); | |
677 | ||
678 | if (cur_conf->enable_beacon) | |
679 | set_bit(SC_OP_BEACONS, &sc->sc_flags); | |
680 | else | |
681 | clear_bit(SC_OP_BEACONS, &sc->sc_flags); | |
682 | } | |
8e22ad32 | 683 | } |
8e22ad32 RM |
684 | } |
685 | ||
ef4ad633 | 686 | void ath9k_set_beacon(struct ath_softc *sc) |
99e4d43a RM |
687 | { |
688 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
689 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; | |
690 | ||
26cd322b | 691 | switch (sc->sc_ah->opmode) { |
6b96f93e | 692 | case NL80211_IFTYPE_AP: |
ef4ad633 | 693 | ath9k_beacon_config_ap(sc, cur_conf); |
6b96f93e VT |
694 | break; |
695 | case NL80211_IFTYPE_ADHOC: | |
696 | case NL80211_IFTYPE_MESH_POINT: | |
ef4ad633 | 697 | ath9k_beacon_config_adhoc(sc, cur_conf); |
6b96f93e VT |
698 | break; |
699 | case NL80211_IFTYPE_STATION: | |
ef4ad633 | 700 | ath9k_beacon_config_sta(sc, cur_conf); |
6b96f93e VT |
701 | break; |
702 | default: | |
d2182b69 | 703 | ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); |
6b96f93e VT |
704 | return; |
705 | } | |
014cf3bb | 706 | } |