Commit | Line | Data |
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8ca21f01 JM |
1 | /* |
2 | * Copyright (c) 2008-2009 Atheros Communications Inc. | |
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 | ||
5a0e3ad6 TH |
17 | #include <linux/slab.h> |
18 | ||
8ca21f01 JM |
19 | #include "ath9k.h" |
20 | ||
21 | struct ath9k_vif_iter_data { | |
31a01645 FF |
22 | const u8 *hw_macaddr; |
23 | u8 mask[ETH_ALEN]; | |
8ca21f01 JM |
24 | }; |
25 | ||
26 | static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) | |
27 | { | |
28 | struct ath9k_vif_iter_data *iter_data = data; | |
31a01645 | 29 | int i; |
8ca21f01 | 30 | |
31a01645 FF |
31 | for (i = 0; i < ETH_ALEN; i++) |
32 | iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]); | |
8ca21f01 JM |
33 | } |
34 | ||
31a01645 | 35 | void ath9k_set_bssid_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif) |
8ca21f01 | 36 | { |
bce048d7 JM |
37 | struct ath_wiphy *aphy = hw->priv; |
38 | struct ath_softc *sc = aphy->sc; | |
1510718d | 39 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
8ca21f01 | 40 | struct ath9k_vif_iter_data iter_data; |
31a01645 | 41 | int i; |
8ca21f01 JM |
42 | |
43 | /* | |
31a01645 FF |
44 | * Use the hardware MAC address as reference, the hardware uses it |
45 | * together with the BSSID mask when matching addresses. | |
8ca21f01 | 46 | */ |
31a01645 FF |
47 | iter_data.hw_macaddr = common->macaddr; |
48 | memset(&iter_data.mask, 0xff, ETH_ALEN); | |
49 | ||
50 | if (vif) | |
51 | ath9k_vif_iter(&iter_data, vif->addr, vif); | |
8ca21f01 JM |
52 | |
53 | /* Get list of all active MAC addresses */ | |
c52f33d0 JM |
54 | spin_lock_bh(&sc->wiphy_lock); |
55 | ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter, | |
8ca21f01 | 56 | &iter_data); |
c52f33d0 JM |
57 | for (i = 0; i < sc->num_sec_wiphy; i++) { |
58 | if (sc->sec_wiphy[i] == NULL) | |
59 | continue; | |
60 | ieee80211_iterate_active_interfaces_atomic( | |
61 | sc->sec_wiphy[i]->hw, ath9k_vif_iter, &iter_data); | |
62 | } | |
63 | spin_unlock_bh(&sc->wiphy_lock); | |
8ca21f01 | 64 | |
31a01645 | 65 | memcpy(common->bssidmask, iter_data.mask, ETH_ALEN); |
13b81559 | 66 | ath_hw_setbssidmask(common); |
8ca21f01 | 67 | } |
c52f33d0 JM |
68 | |
69 | int ath9k_wiphy_add(struct ath_softc *sc) | |
70 | { | |
71 | int i, error; | |
72 | struct ath_wiphy *aphy; | |
1510718d | 73 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
c52f33d0 JM |
74 | struct ieee80211_hw *hw; |
75 | u8 addr[ETH_ALEN]; | |
76 | ||
77 | hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy), &ath9k_ops); | |
78 | if (hw == NULL) | |
79 | return -ENOMEM; | |
80 | ||
81 | spin_lock_bh(&sc->wiphy_lock); | |
82 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
83 | if (sc->sec_wiphy[i] == NULL) | |
84 | break; | |
85 | } | |
86 | ||
87 | if (i == sc->num_sec_wiphy) { | |
88 | /* No empty slot available; increase array length */ | |
89 | struct ath_wiphy **n; | |
90 | n = krealloc(sc->sec_wiphy, | |
91 | (sc->num_sec_wiphy + 1) * | |
92 | sizeof(struct ath_wiphy *), | |
93 | GFP_ATOMIC); | |
94 | if (n == NULL) { | |
95 | spin_unlock_bh(&sc->wiphy_lock); | |
96 | ieee80211_free_hw(hw); | |
97 | return -ENOMEM; | |
98 | } | |
99 | n[i] = NULL; | |
100 | sc->sec_wiphy = n; | |
101 | sc->num_sec_wiphy++; | |
102 | } | |
103 | ||
104 | SET_IEEE80211_DEV(hw, sc->dev); | |
105 | ||
106 | aphy = hw->priv; | |
107 | aphy->sc = sc; | |
108 | aphy->hw = hw; | |
109 | sc->sec_wiphy[i] = aphy; | |
9fa23e17 | 110 | aphy->last_rssi = ATH_RSSI_DUMMY_MARKER; |
c52f33d0 JM |
111 | spin_unlock_bh(&sc->wiphy_lock); |
112 | ||
1510718d | 113 | memcpy(addr, common->macaddr, ETH_ALEN); |
c52f33d0 JM |
114 | addr[0] |= 0x02; /* Locally managed address */ |
115 | /* | |
116 | * XOR virtual wiphy index into the least significant bits to generate | |
117 | * a different MAC address for each virtual wiphy. | |
118 | */ | |
119 | addr[5] ^= i & 0xff; | |
120 | addr[4] ^= (i & 0xff00) >> 8; | |
121 | addr[3] ^= (i & 0xff0000) >> 16; | |
122 | ||
123 | SET_IEEE80211_PERM_ADDR(hw, addr); | |
124 | ||
285f2dda | 125 | ath9k_set_hw_capab(sc, hw); |
c52f33d0 JM |
126 | |
127 | error = ieee80211_register_hw(hw); | |
128 | ||
f98c3bd2 JM |
129 | if (error == 0) { |
130 | /* Make sure wiphy scheduler is started (if enabled) */ | |
131 | ath9k_wiphy_set_scheduler(sc, sc->wiphy_scheduler_int); | |
132 | } | |
133 | ||
c52f33d0 JM |
134 | return error; |
135 | } | |
136 | ||
137 | int ath9k_wiphy_del(struct ath_wiphy *aphy) | |
138 | { | |
139 | struct ath_softc *sc = aphy->sc; | |
140 | int i; | |
141 | ||
142 | spin_lock_bh(&sc->wiphy_lock); | |
143 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
144 | if (aphy == sc->sec_wiphy[i]) { | |
145 | sc->sec_wiphy[i] = NULL; | |
146 | spin_unlock_bh(&sc->wiphy_lock); | |
147 | ieee80211_unregister_hw(aphy->hw); | |
148 | ieee80211_free_hw(aphy->hw); | |
149 | return 0; | |
150 | } | |
151 | } | |
152 | spin_unlock_bh(&sc->wiphy_lock); | |
153 | return -ENOENT; | |
154 | } | |
f0ed85c6 JM |
155 | |
156 | static int ath9k_send_nullfunc(struct ath_wiphy *aphy, | |
157 | struct ieee80211_vif *vif, const u8 *bssid, | |
158 | int ps) | |
159 | { | |
160 | struct ath_softc *sc = aphy->sc; | |
161 | struct ath_tx_control txctl; | |
162 | struct sk_buff *skb; | |
163 | struct ieee80211_hdr *hdr; | |
164 | __le16 fc; | |
165 | struct ieee80211_tx_info *info; | |
166 | ||
167 | skb = dev_alloc_skb(24); | |
168 | if (skb == NULL) | |
169 | return -ENOMEM; | |
170 | hdr = (struct ieee80211_hdr *) skb_put(skb, 24); | |
171 | memset(hdr, 0, 24); | |
172 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
173 | IEEE80211_FCTL_TODS); | |
174 | if (ps) | |
175 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
176 | hdr->frame_control = fc; | |
177 | memcpy(hdr->addr1, bssid, ETH_ALEN); | |
178 | memcpy(hdr->addr2, aphy->hw->wiphy->perm_addr, ETH_ALEN); | |
179 | memcpy(hdr->addr3, bssid, ETH_ALEN); | |
180 | ||
181 | info = IEEE80211_SKB_CB(skb); | |
182 | memset(info, 0, sizeof(*info)); | |
183 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS; | |
184 | info->control.vif = vif; | |
185 | info->control.rates[0].idx = 0; | |
186 | info->control.rates[0].count = 4; | |
187 | info->control.rates[1].idx = -1; | |
188 | ||
189 | memset(&txctl, 0, sizeof(struct ath_tx_control)); | |
066dae93 | 190 | txctl.txq = sc->tx.txq_map[WME_AC_VO]; |
c81494d5 | 191 | txctl.frame_type = ps ? ATH9K_IFT_PAUSE : ATH9K_IFT_UNPAUSE; |
f0ed85c6 JM |
192 | |
193 | if (ath_tx_start(aphy->hw, skb, &txctl) != 0) | |
194 | goto exit; | |
195 | ||
196 | return 0; | |
197 | exit: | |
198 | dev_kfree_skb_any(skb); | |
199 | return -1; | |
200 | } | |
201 | ||
0e2dedf9 JM |
202 | static bool __ath9k_wiphy_pausing(struct ath_softc *sc) |
203 | { | |
204 | int i; | |
205 | if (sc->pri_wiphy->state == ATH_WIPHY_PAUSING) | |
206 | return true; | |
207 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
208 | if (sc->sec_wiphy[i] && | |
209 | sc->sec_wiphy[i]->state == ATH_WIPHY_PAUSING) | |
210 | return true; | |
211 | } | |
212 | return false; | |
213 | } | |
214 | ||
215 | static bool ath9k_wiphy_pausing(struct ath_softc *sc) | |
216 | { | |
217 | bool ret; | |
218 | spin_lock_bh(&sc->wiphy_lock); | |
219 | ret = __ath9k_wiphy_pausing(sc); | |
220 | spin_unlock_bh(&sc->wiphy_lock); | |
221 | return ret; | |
222 | } | |
223 | ||
8089cc47 JM |
224 | static bool __ath9k_wiphy_scanning(struct ath_softc *sc) |
225 | { | |
226 | int i; | |
227 | if (sc->pri_wiphy->state == ATH_WIPHY_SCAN) | |
228 | return true; | |
229 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
230 | if (sc->sec_wiphy[i] && | |
231 | sc->sec_wiphy[i]->state == ATH_WIPHY_SCAN) | |
232 | return true; | |
233 | } | |
234 | return false; | |
235 | } | |
236 | ||
237 | bool ath9k_wiphy_scanning(struct ath_softc *sc) | |
238 | { | |
239 | bool ret; | |
240 | spin_lock_bh(&sc->wiphy_lock); | |
241 | ret = __ath9k_wiphy_scanning(sc); | |
242 | spin_unlock_bh(&sc->wiphy_lock); | |
243 | return ret; | |
244 | } | |
245 | ||
0e2dedf9 JM |
246 | static int __ath9k_wiphy_unpause(struct ath_wiphy *aphy); |
247 | ||
248 | /* caller must hold wiphy_lock */ | |
249 | static void __ath9k_wiphy_unpause_ch(struct ath_wiphy *aphy) | |
250 | { | |
251 | if (aphy == NULL) | |
252 | return; | |
253 | if (aphy->chan_idx != aphy->sc->chan_idx) | |
254 | return; /* wiphy not on the selected channel */ | |
255 | __ath9k_wiphy_unpause(aphy); | |
256 | } | |
257 | ||
258 | static void ath9k_wiphy_unpause_channel(struct ath_softc *sc) | |
259 | { | |
260 | int i; | |
261 | spin_lock_bh(&sc->wiphy_lock); | |
262 | __ath9k_wiphy_unpause_ch(sc->pri_wiphy); | |
263 | for (i = 0; i < sc->num_sec_wiphy; i++) | |
264 | __ath9k_wiphy_unpause_ch(sc->sec_wiphy[i]); | |
265 | spin_unlock_bh(&sc->wiphy_lock); | |
266 | } | |
267 | ||
268 | void ath9k_wiphy_chan_work(struct work_struct *work) | |
269 | { | |
270 | struct ath_softc *sc = container_of(work, struct ath_softc, chan_work); | |
1bdf6c3b | 271 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
0e2dedf9 JM |
272 | struct ath_wiphy *aphy = sc->next_wiphy; |
273 | ||
274 | if (aphy == NULL) | |
275 | return; | |
276 | ||
277 | /* | |
278 | * All pending interfaces paused; ready to change | |
279 | * channels. | |
280 | */ | |
281 | ||
282 | /* Change channels */ | |
283 | mutex_lock(&sc->mutex); | |
284 | /* XXX: remove me eventually */ | |
285 | ath9k_update_ichannel(sc, aphy->hw, | |
286 | &sc->sc_ah->channels[sc->chan_idx]); | |
1bdf6c3b LR |
287 | |
288 | /* sync hw configuration for hw code */ | |
289 | common->hw = aphy->hw; | |
290 | ||
0e2dedf9 JM |
291 | if (ath_set_channel(sc, aphy->hw, |
292 | &sc->sc_ah->channels[sc->chan_idx]) < 0) { | |
293 | printk(KERN_DEBUG "ath9k: Failed to set channel for new " | |
294 | "virtual wiphy\n"); | |
295 | mutex_unlock(&sc->mutex); | |
296 | return; | |
297 | } | |
298 | mutex_unlock(&sc->mutex); | |
299 | ||
300 | ath9k_wiphy_unpause_channel(sc); | |
301 | } | |
302 | ||
f0ed85c6 JM |
303 | /* |
304 | * ath9k version of ieee80211_tx_status() for TX frames that are generated | |
305 | * internally in the driver. | |
306 | */ | |
61117f01 | 307 | void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, int ftype) |
f0ed85c6 JM |
308 | { |
309 | struct ath_wiphy *aphy = hw->priv; | |
f0ed85c6 | 310 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
f0ed85c6 | 311 | |
61117f01 | 312 | if (ftype == ATH9K_IFT_PAUSE && aphy->state == ATH_WIPHY_PAUSING) { |
827e69bf | 313 | if (!(tx_info->flags & IEEE80211_TX_STAT_ACK)) { |
f0ed85c6 JM |
314 | printk(KERN_DEBUG "ath9k: %s: no ACK for pause " |
315 | "frame\n", wiphy_name(hw->wiphy)); | |
316 | /* | |
317 | * The AP did not reply; ignore this to allow us to | |
318 | * continue. | |
319 | */ | |
320 | } | |
321 | aphy->state = ATH_WIPHY_PAUSED; | |
0e2dedf9 JM |
322 | if (!ath9k_wiphy_pausing(aphy->sc)) { |
323 | /* | |
324 | * Drop from tasklet to work to allow mutex for channel | |
325 | * change. | |
326 | */ | |
42935eca | 327 | ieee80211_queue_work(aphy->sc->hw, |
0e2dedf9 JM |
328 | &aphy->sc->chan_work); |
329 | } | |
f0ed85c6 JM |
330 | } |
331 | ||
f0ed85c6 JM |
332 | dev_kfree_skb(skb); |
333 | } | |
334 | ||
0e2dedf9 JM |
335 | static void ath9k_mark_paused(struct ath_wiphy *aphy) |
336 | { | |
337 | struct ath_softc *sc = aphy->sc; | |
338 | aphy->state = ATH_WIPHY_PAUSED; | |
339 | if (!__ath9k_wiphy_pausing(sc)) | |
42935eca | 340 | ieee80211_queue_work(sc->hw, &sc->chan_work); |
0e2dedf9 JM |
341 | } |
342 | ||
f0ed85c6 JM |
343 | static void ath9k_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif) |
344 | { | |
345 | struct ath_wiphy *aphy = data; | |
346 | struct ath_vif *avp = (void *) vif->drv_priv; | |
347 | ||
348 | switch (vif->type) { | |
349 | case NL80211_IFTYPE_STATION: | |
350 | if (!vif->bss_conf.assoc) { | |
0e2dedf9 | 351 | ath9k_mark_paused(aphy); |
f0ed85c6 JM |
352 | break; |
353 | } | |
354 | /* TODO: could avoid this if already in PS mode */ | |
0e2dedf9 JM |
355 | if (ath9k_send_nullfunc(aphy, vif, avp->bssid, 1)) { |
356 | printk(KERN_DEBUG "%s: failed to send PS nullfunc\n", | |
357 | __func__); | |
358 | ath9k_mark_paused(aphy); | |
359 | } | |
f0ed85c6 JM |
360 | break; |
361 | case NL80211_IFTYPE_AP: | |
362 | /* Beacon transmission is paused by aphy->state change */ | |
0e2dedf9 | 363 | ath9k_mark_paused(aphy); |
f0ed85c6 JM |
364 | break; |
365 | default: | |
366 | break; | |
367 | } | |
368 | } | |
369 | ||
370 | /* caller must hold wiphy_lock */ | |
371 | static int __ath9k_wiphy_pause(struct ath_wiphy *aphy) | |
372 | { | |
373 | ieee80211_stop_queues(aphy->hw); | |
374 | aphy->state = ATH_WIPHY_PAUSING; | |
375 | /* | |
376 | * TODO: handle PAUSING->PAUSED for the case where there are multiple | |
377 | * active vifs (now we do it on the first vif getting ready; should be | |
378 | * on the last) | |
379 | */ | |
380 | ieee80211_iterate_active_interfaces_atomic(aphy->hw, ath9k_pause_iter, | |
381 | aphy); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | int ath9k_wiphy_pause(struct ath_wiphy *aphy) | |
386 | { | |
387 | int ret; | |
388 | spin_lock_bh(&aphy->sc->wiphy_lock); | |
389 | ret = __ath9k_wiphy_pause(aphy); | |
390 | spin_unlock_bh(&aphy->sc->wiphy_lock); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | static void ath9k_unpause_iter(void *data, u8 *mac, struct ieee80211_vif *vif) | |
395 | { | |
396 | struct ath_wiphy *aphy = data; | |
397 | struct ath_vif *avp = (void *) vif->drv_priv; | |
398 | ||
399 | switch (vif->type) { | |
400 | case NL80211_IFTYPE_STATION: | |
401 | if (!vif->bss_conf.assoc) | |
402 | break; | |
403 | ath9k_send_nullfunc(aphy, vif, avp->bssid, 0); | |
404 | break; | |
405 | case NL80211_IFTYPE_AP: | |
406 | /* Beacon transmission is re-enabled by aphy->state change */ | |
407 | break; | |
408 | default: | |
409 | break; | |
410 | } | |
411 | } | |
412 | ||
413 | /* caller must hold wiphy_lock */ | |
414 | static int __ath9k_wiphy_unpause(struct ath_wiphy *aphy) | |
415 | { | |
416 | ieee80211_iterate_active_interfaces_atomic(aphy->hw, | |
417 | ath9k_unpause_iter, aphy); | |
418 | aphy->state = ATH_WIPHY_ACTIVE; | |
419 | ieee80211_wake_queues(aphy->hw); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | int ath9k_wiphy_unpause(struct ath_wiphy *aphy) | |
424 | { | |
425 | int ret; | |
426 | spin_lock_bh(&aphy->sc->wiphy_lock); | |
427 | ret = __ath9k_wiphy_unpause(aphy); | |
428 | spin_unlock_bh(&aphy->sc->wiphy_lock); | |
429 | return ret; | |
430 | } | |
0e2dedf9 | 431 | |
7ec3e514 JM |
432 | static void __ath9k_wiphy_mark_all_paused(struct ath_softc *sc) |
433 | { | |
434 | int i; | |
435 | if (sc->pri_wiphy->state != ATH_WIPHY_INACTIVE) | |
436 | sc->pri_wiphy->state = ATH_WIPHY_PAUSED; | |
437 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
438 | if (sc->sec_wiphy[i] && | |
439 | sc->sec_wiphy[i]->state != ATH_WIPHY_INACTIVE) | |
440 | sc->sec_wiphy[i]->state = ATH_WIPHY_PAUSED; | |
441 | } | |
442 | } | |
443 | ||
0e2dedf9 JM |
444 | /* caller must hold wiphy_lock */ |
445 | static void __ath9k_wiphy_pause_all(struct ath_softc *sc) | |
446 | { | |
447 | int i; | |
448 | if (sc->pri_wiphy->state == ATH_WIPHY_ACTIVE) | |
449 | __ath9k_wiphy_pause(sc->pri_wiphy); | |
450 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
451 | if (sc->sec_wiphy[i] && | |
452 | sc->sec_wiphy[i]->state == ATH_WIPHY_ACTIVE) | |
453 | __ath9k_wiphy_pause(sc->sec_wiphy[i]); | |
454 | } | |
455 | } | |
456 | ||
457 | int ath9k_wiphy_select(struct ath_wiphy *aphy) | |
458 | { | |
459 | struct ath_softc *sc = aphy->sc; | |
460 | bool now; | |
461 | ||
462 | spin_lock_bh(&sc->wiphy_lock); | |
8089cc47 JM |
463 | if (__ath9k_wiphy_scanning(sc)) { |
464 | /* | |
465 | * For now, we are using mac80211 sw scan and it expects to | |
466 | * have full control over channel changes, so avoid wiphy | |
467 | * scheduling during a scan. This could be optimized if the | |
468 | * scanning control were moved into the driver. | |
469 | */ | |
470 | spin_unlock_bh(&sc->wiphy_lock); | |
471 | return -EBUSY; | |
472 | } | |
0e2dedf9 | 473 | if (__ath9k_wiphy_pausing(sc)) { |
7ec3e514 JM |
474 | if (sc->wiphy_select_failures == 0) |
475 | sc->wiphy_select_first_fail = jiffies; | |
476 | sc->wiphy_select_failures++; | |
477 | if (time_after(jiffies, sc->wiphy_select_first_fail + HZ / 2)) | |
478 | { | |
479 | printk(KERN_DEBUG "ath9k: Previous wiphy select timed " | |
480 | "out; disable/enable hw to recover\n"); | |
481 | __ath9k_wiphy_mark_all_paused(sc); | |
482 | /* | |
483 | * TODO: this workaround to fix hardware is unlikely to | |
484 | * be specific to virtual wiphy changes. It can happen | |
485 | * on normal channel change, too, and as such, this | |
486 | * should really be made more generic. For example, | |
487 | * tricker radio disable/enable on GTT interrupt burst | |
488 | * (say, 10 GTT interrupts received without any TX | |
489 | * frame being completed) | |
490 | */ | |
491 | spin_unlock_bh(&sc->wiphy_lock); | |
68a89116 LR |
492 | ath_radio_disable(sc, aphy->hw); |
493 | ath_radio_enable(sc, aphy->hw); | |
494 | /* Only the primary wiphy hw is used for queuing work */ | |
42935eca | 495 | ieee80211_queue_work(aphy->sc->hw, |
7ec3e514 JM |
496 | &aphy->sc->chan_work); |
497 | return -EBUSY; /* previous select still in progress */ | |
498 | } | |
0e2dedf9 JM |
499 | spin_unlock_bh(&sc->wiphy_lock); |
500 | return -EBUSY; /* previous select still in progress */ | |
501 | } | |
7ec3e514 | 502 | sc->wiphy_select_failures = 0; |
0e2dedf9 JM |
503 | |
504 | /* Store the new channel */ | |
505 | sc->chan_idx = aphy->chan_idx; | |
506 | sc->chan_is_ht = aphy->chan_is_ht; | |
507 | sc->next_wiphy = aphy; | |
508 | ||
509 | __ath9k_wiphy_pause_all(sc); | |
510 | now = !__ath9k_wiphy_pausing(aphy->sc); | |
511 | spin_unlock_bh(&sc->wiphy_lock); | |
512 | ||
513 | if (now) { | |
514 | /* Ready to request channel change immediately */ | |
42935eca | 515 | ieee80211_queue_work(aphy->sc->hw, &aphy->sc->chan_work); |
0e2dedf9 JM |
516 | } |
517 | ||
518 | /* | |
519 | * wiphys will be unpaused in ath9k_tx_status() once channel has been | |
520 | * changed if any wiphy needs time to become paused. | |
521 | */ | |
522 | ||
523 | return 0; | |
524 | } | |
9580a222 JM |
525 | |
526 | bool ath9k_wiphy_started(struct ath_softc *sc) | |
527 | { | |
528 | int i; | |
529 | spin_lock_bh(&sc->wiphy_lock); | |
530 | if (sc->pri_wiphy->state != ATH_WIPHY_INACTIVE) { | |
531 | spin_unlock_bh(&sc->wiphy_lock); | |
532 | return true; | |
533 | } | |
534 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
535 | if (sc->sec_wiphy[i] && | |
536 | sc->sec_wiphy[i]->state != ATH_WIPHY_INACTIVE) { | |
537 | spin_unlock_bh(&sc->wiphy_lock); | |
538 | return true; | |
539 | } | |
540 | } | |
541 | spin_unlock_bh(&sc->wiphy_lock); | |
542 | return false; | |
543 | } | |
18eb62f8 JM |
544 | |
545 | static void ath9k_wiphy_pause_chan(struct ath_wiphy *aphy, | |
546 | struct ath_wiphy *selected) | |
547 | { | |
8089cc47 JM |
548 | if (selected->state == ATH_WIPHY_SCAN) { |
549 | if (aphy == selected) | |
550 | return; | |
551 | /* | |
552 | * Pause all other wiphys for the duration of the scan even if | |
553 | * they are on the current channel now. | |
554 | */ | |
555 | } else if (aphy->chan_idx == selected->chan_idx) | |
18eb62f8 JM |
556 | return; |
557 | aphy->state = ATH_WIPHY_PAUSED; | |
558 | ieee80211_stop_queues(aphy->hw); | |
559 | } | |
560 | ||
561 | void ath9k_wiphy_pause_all_forced(struct ath_softc *sc, | |
562 | struct ath_wiphy *selected) | |
563 | { | |
564 | int i; | |
565 | spin_lock_bh(&sc->wiphy_lock); | |
566 | if (sc->pri_wiphy->state == ATH_WIPHY_ACTIVE) | |
567 | ath9k_wiphy_pause_chan(sc->pri_wiphy, selected); | |
568 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
569 | if (sc->sec_wiphy[i] && | |
570 | sc->sec_wiphy[i]->state == ATH_WIPHY_ACTIVE) | |
571 | ath9k_wiphy_pause_chan(sc->sec_wiphy[i], selected); | |
572 | } | |
573 | spin_unlock_bh(&sc->wiphy_lock); | |
574 | } | |
f98c3bd2 JM |
575 | |
576 | void ath9k_wiphy_work(struct work_struct *work) | |
577 | { | |
578 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
579 | wiphy_work.work); | |
580 | struct ath_wiphy *aphy = NULL; | |
581 | bool first = true; | |
582 | ||
583 | spin_lock_bh(&sc->wiphy_lock); | |
584 | ||
585 | if (sc->wiphy_scheduler_int == 0) { | |
586 | /* wiphy scheduler is disabled */ | |
587 | spin_unlock_bh(&sc->wiphy_lock); | |
588 | return; | |
589 | } | |
590 | ||
591 | try_again: | |
592 | sc->wiphy_scheduler_index++; | |
593 | while (sc->wiphy_scheduler_index <= sc->num_sec_wiphy) { | |
594 | aphy = sc->sec_wiphy[sc->wiphy_scheduler_index - 1]; | |
595 | if (aphy && aphy->state != ATH_WIPHY_INACTIVE) | |
596 | break; | |
597 | ||
598 | sc->wiphy_scheduler_index++; | |
599 | aphy = NULL; | |
600 | } | |
601 | if (aphy == NULL) { | |
602 | sc->wiphy_scheduler_index = 0; | |
603 | if (sc->pri_wiphy->state == ATH_WIPHY_INACTIVE) { | |
604 | if (first) { | |
605 | first = false; | |
606 | goto try_again; | |
607 | } | |
608 | /* No wiphy is ready to be scheduled */ | |
609 | } else | |
610 | aphy = sc->pri_wiphy; | |
611 | } | |
612 | ||
613 | spin_unlock_bh(&sc->wiphy_lock); | |
614 | ||
615 | if (aphy && | |
616 | aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN && | |
617 | ath9k_wiphy_select(aphy)) { | |
618 | printk(KERN_DEBUG "ath9k: Failed to schedule virtual wiphy " | |
619 | "change\n"); | |
620 | } | |
621 | ||
42935eca LR |
622 | ieee80211_queue_delayed_work(sc->hw, |
623 | &sc->wiphy_work, | |
624 | sc->wiphy_scheduler_int); | |
f98c3bd2 JM |
625 | } |
626 | ||
627 | void ath9k_wiphy_set_scheduler(struct ath_softc *sc, unsigned int msec_int) | |
628 | { | |
629 | cancel_delayed_work_sync(&sc->wiphy_work); | |
630 | sc->wiphy_scheduler_int = msecs_to_jiffies(msec_int); | |
631 | if (sc->wiphy_scheduler_int) | |
42935eca LR |
632 | ieee80211_queue_delayed_work(sc->hw, &sc->wiphy_work, |
633 | sc->wiphy_scheduler_int); | |
f98c3bd2 | 634 | } |
64839170 LR |
635 | |
636 | /* caller must hold wiphy_lock */ | |
637 | bool ath9k_all_wiphys_idle(struct ath_softc *sc) | |
638 | { | |
639 | unsigned int i; | |
194b7c13 | 640 | if (!sc->pri_wiphy->idle) |
64839170 | 641 | return false; |
64839170 LR |
642 | for (i = 0; i < sc->num_sec_wiphy; i++) { |
643 | struct ath_wiphy *aphy = sc->sec_wiphy[i]; | |
644 | if (!aphy) | |
645 | continue; | |
194b7c13 | 646 | if (!aphy->idle) |
64839170 LR |
647 | return false; |
648 | } | |
649 | return true; | |
650 | } | |
194b7c13 LR |
651 | |
652 | /* caller must hold wiphy_lock */ | |
653 | void ath9k_set_wiphy_idle(struct ath_wiphy *aphy, bool idle) | |
654 | { | |
655 | struct ath_softc *sc = aphy->sc; | |
656 | ||
657 | aphy->idle = idle; | |
226afe68 JP |
658 | ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG, |
659 | "Marking %s as %sidle\n", | |
660 | wiphy_name(aphy->hw->wiphy), idle ? "" : "not-"); | |
194b7c13 | 661 | } |
f52de03b | 662 | /* Only bother starting a queue on an active virtual wiphy */ |
68e8f2fa | 663 | bool ath_mac80211_start_queue(struct ath_softc *sc, u16 skb_queue) |
f52de03b LR |
664 | { |
665 | struct ieee80211_hw *hw = sc->pri_wiphy->hw; | |
666 | unsigned int i; | |
68e8f2fa | 667 | bool txq_started = false; |
f52de03b LR |
668 | |
669 | spin_lock_bh(&sc->wiphy_lock); | |
670 | ||
671 | /* Start the primary wiphy */ | |
672 | if (sc->pri_wiphy->state == ATH_WIPHY_ACTIVE) { | |
673 | ieee80211_wake_queue(hw, skb_queue); | |
68e8f2fa | 674 | txq_started = true; |
f52de03b LR |
675 | goto unlock; |
676 | } | |
677 | ||
678 | /* Now start the secondary wiphy queues */ | |
679 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
680 | struct ath_wiphy *aphy = sc->sec_wiphy[i]; | |
681 | if (!aphy) | |
682 | continue; | |
683 | if (aphy->state != ATH_WIPHY_ACTIVE) | |
684 | continue; | |
685 | ||
686 | hw = aphy->hw; | |
687 | ieee80211_wake_queue(hw, skb_queue); | |
68e8f2fa | 688 | txq_started = true; |
f52de03b LR |
689 | break; |
690 | } | |
691 | ||
692 | unlock: | |
693 | spin_unlock_bh(&sc->wiphy_lock); | |
68e8f2fa | 694 | return txq_started; |
f52de03b LR |
695 | } |
696 | ||
697 | /* Go ahead and propagate information to all virtual wiphys, it won't hurt */ | |
698 | void ath_mac80211_stop_queue(struct ath_softc *sc, u16 skb_queue) | |
699 | { | |
700 | struct ieee80211_hw *hw = sc->pri_wiphy->hw; | |
701 | unsigned int i; | |
702 | ||
703 | spin_lock_bh(&sc->wiphy_lock); | |
704 | ||
705 | /* Stop the primary wiphy */ | |
706 | ieee80211_stop_queue(hw, skb_queue); | |
707 | ||
708 | /* Now stop the secondary wiphy queues */ | |
709 | for (i = 0; i < sc->num_sec_wiphy; i++) { | |
710 | struct ath_wiphy *aphy = sc->sec_wiphy[i]; | |
711 | if (!aphy) | |
712 | continue; | |
713 | hw = aphy->hw; | |
714 | ieee80211_stop_queue(hw, skb_queue); | |
715 | } | |
716 | spin_unlock_bh(&sc->wiphy_lock); | |
717 | } |