2 * Copyright (c) 2010 Atheros Communications Inc.
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.
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.
21 static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
22 struct htc_beacon_config *bss_conf)
24 struct ath_common *common = ath9k_hw_common(priv->ah);
25 struct ath9k_beacon_state bs;
26 enum ath9k_int imask = 0;
27 int dtimperiod, dtimcount, sleepduration;
28 int cfpperiod, cfpcount, bmiss_timeout;
29 u32 nexttbtt = 0, intval, tsftu;
32 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
36 memset(&bs, 0, sizeof(bs));
38 intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
39 bmiss_timeout = (ATH_DEFAULT_BMISS_LIMIT * bss_conf->beacon_interval);
42 * Setup dtim and cfp parameters according to
43 * last beacon we received (which may be none).
45 dtimperiod = bss_conf->dtim_period;
46 if (dtimperiod <= 0) /* NB: 0 if not known */
49 if (dtimcount >= dtimperiod) /* NB: sanity check */
51 cfpperiod = 1; /* NB: no PCF support yet */
54 sleepduration = intval;
55 if (sleepduration <= 0)
56 sleepduration = intval;
59 * Pull nexttbtt forward to reflect the current
60 * TSF and calculate dtim+cfp state for the result.
62 tsf = ath9k_hw_gettsf64(priv->ah);
63 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
65 num_beacons = tsftu / intval + 1;
66 offset = tsftu % intval;
67 nexttbtt = tsftu - offset;
71 /* DTIM Beacon every dtimperiod Beacon */
72 dtim_dec_count = num_beacons % dtimperiod;
73 /* CFP every cfpperiod DTIM Beacon */
74 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
78 dtimcount -= dtim_dec_count;
80 dtimcount += dtimperiod;
82 cfpcount -= cfp_dec_count;
84 cfpcount += cfpperiod;
86 bs.bs_intval = intval;
87 bs.bs_nexttbtt = nexttbtt;
88 bs.bs_dtimperiod = dtimperiod*intval;
89 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
90 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
91 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
92 bs.bs_cfpmaxduration = 0;
95 * Calculate the number of consecutive beacons to miss* before taking
96 * a BMISS interrupt. The configuration is specified in TU so we only
97 * need calculate based on the beacon interval. Note that we clamp the
98 * result to at most 15 beacons.
100 if (sleepduration > intval) {
101 bs.bs_bmissthreshold = ATH_DEFAULT_BMISS_LIMIT / 2;
103 bs.bs_bmissthreshold = DIV_ROUND_UP(bmiss_timeout, intval);
104 if (bs.bs_bmissthreshold > 15)
105 bs.bs_bmissthreshold = 15;
106 else if (bs.bs_bmissthreshold <= 0)
107 bs.bs_bmissthreshold = 1;
111 * Calculate sleep duration. The configuration is given in ms.
112 * We ensure a multiple of the beacon period is used. Also, if the sleep
113 * duration is greater than the DTIM period then it makes senses
114 * to make it a multiple of that.
119 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
120 if (bs.bs_sleepduration > bs.bs_dtimperiod)
121 bs.bs_sleepduration = bs.bs_dtimperiod;
123 /* TSF out of range threshold fixed at 1 second */
124 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
126 ath_dbg(common, ATH_DBG_CONFIG, "intval: %u tsf: %llu tsftu: %u\n",
128 ath_dbg(common, ATH_DBG_CONFIG,
129 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
130 bs.bs_bmissthreshold, bs.bs_sleepduration,
131 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
133 /* Set the computed STA beacon timers */
135 WMI_CMD(WMI_DISABLE_INTR_CMDID);
136 ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
137 imask |= ATH9K_INT_BMISS;
138 htc_imask = cpu_to_be32(imask);
139 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
142 static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
143 struct htc_beacon_config *bss_conf)
145 struct ath_common *common = ath9k_hw_common(priv->ah);
146 enum ath9k_int imask = 0;
147 u32 nexttbtt, intval, tsftu;
148 __be32 htc_imask = 0;
153 intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
154 intval /= ATH9K_HTC_MAX_BCN_VIF;
157 if (priv->op_flags & OP_TSF_RESET) {
158 ath9k_hw_reset_tsf(priv->ah);
159 priv->op_flags &= ~OP_TSF_RESET;
162 * Pull nexttbtt forward to reflect the current TSF.
164 tsf = ath9k_hw_gettsf64(priv->ah);
165 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
168 } while (nexttbtt < tsftu);
171 if (priv->op_flags & OP_ENABLE_BEACON)
172 imask |= ATH9K_INT_SWBA;
174 ath_dbg(common, ATH_DBG_CONFIG,
175 "AP Beacon config, intval: %d, nexttbtt: %u imask: 0x%x\n",
176 bss_conf->beacon_interval, nexttbtt, imask);
178 WMI_CMD(WMI_DISABLE_INTR_CMDID);
179 ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
181 htc_imask = cpu_to_be32(imask);
182 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
185 static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
186 struct htc_beacon_config *bss_conf)
188 struct ath_common *common = ath9k_hw_common(priv->ah);
189 enum ath9k_int imask = 0;
190 u32 nexttbtt, intval, tsftu;
191 __be32 htc_imask = 0;
196 intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
200 * Pull nexttbtt forward to reflect the current TSF.
202 tsf = ath9k_hw_gettsf64(priv->ah);
203 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
206 } while (nexttbtt < tsftu);
208 if (priv->op_flags & OP_ENABLE_BEACON)
209 imask |= ATH9K_INT_SWBA;
211 ath_dbg(common, ATH_DBG_CONFIG,
212 "IBSS Beacon config, intval: %d, nexttbtt: %u, imask: 0x%x\n",
213 bss_conf->beacon_interval, nexttbtt, imask);
215 WMI_CMD(WMI_DISABLE_INTR_CMDID);
216 ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
218 htc_imask = cpu_to_be32(imask);
219 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
222 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
223 enum htc_endpoint_id ep_id, bool txok)
225 dev_kfree_skb_any(skb);
228 void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending)
230 struct ath9k_htc_vif *avp = (void *)priv->vif->drv_priv;
231 struct tx_beacon_header beacon_hdr;
232 struct ath9k_htc_tx_ctl tx_ctl;
233 struct ieee80211_tx_info *info;
234 struct sk_buff *beacon;
237 memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
238 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
240 /* FIXME: Handle BMISS */
241 if (beacon_pending != 0) {
246 spin_lock_bh(&priv->beacon_lock);
248 if (unlikely(priv->op_flags & OP_SCANNING)) {
249 spin_unlock_bh(&priv->beacon_lock);
253 /* Get a new beacon */
254 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
256 spin_unlock_bh(&priv->beacon_lock);
260 info = IEEE80211_SKB_CB(beacon);
261 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
262 struct ieee80211_hdr *hdr =
263 (struct ieee80211_hdr *) beacon->data;
265 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
266 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
269 tx_ctl.type = ATH9K_HTC_NORMAL;
270 beacon_hdr.vif_index = avp->index;
271 tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
272 memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
274 htc_send(priv->htc, beacon, priv->beacon_ep, &tx_ctl);
276 spin_unlock_bh(&priv->beacon_lock);
279 /* Currently, only for IBSS */
280 void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
282 struct ath_hw *ah = priv->ah;
283 struct ath9k_tx_queue_info qi, qi_be;
284 int qnum = priv->hwq_map[WME_AC_BE];
286 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
287 memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info));
289 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
291 qi.tqi_aifs = qi_be.tqi_aifs;
292 /* For WIFI Beacon Distribution
293 * Long slot time : 2x cwmin
294 * Short slot time : 4x cwmin
296 if (ah->slottime == ATH9K_SLOT_TIME_20)
297 qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
299 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
300 qi.tqi_cwmax = qi_be.tqi_cwmax;
302 if (!ath9k_hw_set_txq_props(ah, priv->beaconq, &qi)) {
303 ath_err(ath9k_hw_common(ah),
304 "Unable to update beacon queue %u!\n", qnum);
306 ath9k_hw_resettxqueue(ah, priv->beaconq);
310 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
312 bool *beacon_configured = (bool *)data;
313 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
315 if (vif->type == NL80211_IFTYPE_STATION &&
316 avp->beacon_configured)
317 *beacon_configured = true;
320 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
321 struct ieee80211_vif *vif)
323 struct ath_common *common = ath9k_hw_common(priv->ah);
324 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
325 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
326 bool beacon_configured;
329 * Changing the beacon interval when multiple AP interfaces
330 * are configured will affect beacon transmission of all
333 if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
334 (priv->num_ap_vif > 1) &&
335 (vif->type == NL80211_IFTYPE_AP) &&
336 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
337 ath_dbg(common, ATH_DBG_CONFIG,
338 "Changing beacon interval of multiple AP interfaces !\n");
343 * If the HW is operating in AP mode, any new station interfaces that
344 * are added cannot change the beacon parameters.
346 if (priv->num_ap_vif &&
347 (vif->type != NL80211_IFTYPE_AP)) {
348 ath_dbg(common, ATH_DBG_CONFIG,
349 "HW in AP mode, cannot set STA beacon parameters\n");
354 * The beacon parameters are configured only for the first
357 if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
358 (priv->num_sta_vif > 1) &&
359 (vif->type == NL80211_IFTYPE_STATION)) {
360 beacon_configured = false;
361 ieee80211_iterate_active_interfaces_atomic(priv->hw,
362 ath9k_htc_beacon_iter,
365 if (beacon_configured) {
366 ath_dbg(common, ATH_DBG_CONFIG,
367 "Beacon already configured for a station interface\n");
375 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
376 struct ieee80211_vif *vif)
378 struct ath_common *common = ath9k_hw_common(priv->ah);
379 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
380 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
381 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
383 if (!ath9k_htc_check_beacon_config(priv, vif))
386 cur_conf->beacon_interval = bss_conf->beacon_int;
387 if (cur_conf->beacon_interval == 0)
388 cur_conf->beacon_interval = 100;
390 cur_conf->dtim_period = bss_conf->dtim_period;
391 cur_conf->bmiss_timeout =
392 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
395 case NL80211_IFTYPE_STATION:
396 ath9k_htc_beacon_config_sta(priv, cur_conf);
397 avp->beacon_configured = true;
399 case NL80211_IFTYPE_ADHOC:
400 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
402 case NL80211_IFTYPE_AP:
403 ath9k_htc_beacon_config_ap(priv, cur_conf);
406 ath_dbg(common, ATH_DBG_CONFIG,
407 "Unsupported beaconing mode\n");
412 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
414 struct ath_common *common = ath9k_hw_common(priv->ah);
415 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
417 switch (priv->ah->opmode) {
418 case NL80211_IFTYPE_STATION:
419 ath9k_htc_beacon_config_sta(priv, cur_conf);
421 case NL80211_IFTYPE_ADHOC:
422 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
424 case NL80211_IFTYPE_AP:
425 ath9k_htc_beacon_config_ap(priv, cur_conf);
428 ath_dbg(common, ATH_DBG_CONFIG,
429 "Unsupported beaconing mode\n");