1 /*
2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 /*
20 Module: rt2x00mac
21 Abstract: rt2x00 generic mac80211 routines.
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26
27 #include "rt2x00.h"
28 #include "rt2x00lib.h"
29
rt2x00mac_tx_rts_cts(struct rt2x00_dev * rt2x00dev,struct data_queue * queue,struct sk_buff * frag_skb)30 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
31 struct data_queue *queue,
32 struct sk_buff *frag_skb)
33 {
34 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb);
35 struct ieee80211_tx_info *rts_info;
36 struct sk_buff *skb;
37 unsigned int data_length;
38 int retval = 0;
39
40 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
41 data_length = sizeof(struct ieee80211_cts);
42 else
43 data_length = sizeof(struct ieee80211_rts);
44
45 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom);
46 if (unlikely(!skb)) {
47 rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n");
48 return -ENOMEM;
49 }
50
51 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
52 skb_put(skb, data_length);
53
54 /*
55 * Copy TX information over from original frame to
56 * RTS/CTS frame. Note that we set the no encryption flag
57 * since we don't want this frame to be encrypted.
58 * RTS frames should be acked, while CTS-to-self frames
59 * should not. The ready for TX flag is cleared to prevent
60 * it being automatically send when the descriptor is
61 * written to the hardware.
62 */
63 memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb));
64 rts_info = IEEE80211_SKB_CB(skb);
65 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS;
66 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT;
67
68 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
69 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK;
70 else
71 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
72
73 /* Disable hardware encryption */
74 rts_info->control.hw_key = NULL;
75
76 /*
77 * RTS/CTS frame should use the length of the frame plus any
78 * encryption overhead that will be added by the hardware.
79 */
80 data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);
81
82 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
83 ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif,
84 frag_skb->data, data_length, tx_info,
85 (struct ieee80211_cts *)(skb->data));
86 else
87 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif,
88 frag_skb->data, data_length, tx_info,
89 (struct ieee80211_rts *)(skb->data));
90
91 retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true);
92 if (retval) {
93 dev_kfree_skb_any(skb);
94 rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n");
95 }
96
97 return retval;
98 }
99
rt2x00mac_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)100 void rt2x00mac_tx(struct ieee80211_hw *hw,
101 struct ieee80211_tx_control *control,
102 struct sk_buff *skb)
103 {
104 struct rt2x00_dev *rt2x00dev = hw->priv;
105 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
106 enum data_queue_qid qid = skb_get_queue_mapping(skb);
107 struct data_queue *queue = NULL;
108
109 /*
110 * Mac80211 might be calling this function while we are trying
111 * to remove the device or perhaps suspending it.
112 * Note that we can only stop the TX queues inside the TX path
113 * due to possible race conditions in mac80211.
114 */
115 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
116 goto exit_free_skb;
117
118 /*
119 * Use the ATIM queue if appropriate and present.
120 */
121 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
122 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE))
123 qid = QID_ATIM;
124
125 queue = rt2x00queue_get_tx_queue(rt2x00dev, qid);
126 if (unlikely(!queue)) {
127 rt2x00_err(rt2x00dev,
128 "Attempt to send packet over invalid queue %d\n"
129 "Please file bug report to %s\n", qid, DRV_PROJECT);
130 goto exit_free_skb;
131 }
132
133 /*
134 * If CTS/RTS is required. create and queue that frame first.
135 * Make sure we have at least enough entries available to send
136 * this CTS/RTS frame as well as the data frame.
137 * Note that when the driver has set the set_rts_threshold()
138 * callback function it doesn't need software generation of
139 * either RTS or CTS-to-self frame and handles everything
140 * inside the hardware.
141 */
142 if (!rt2x00dev->ops->hw->set_rts_threshold &&
143 (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS |
144 IEEE80211_TX_RC_USE_CTS_PROTECT))) {
145 if (rt2x00queue_available(queue) <= 1) {
146 /*
147 * Recheck for full queue under lock to avoid race
148 * conditions with rt2x00lib_txdone().
149 */
150 spin_lock(&queue->tx_lock);
151 if (rt2x00queue_threshold(queue))
152 rt2x00queue_pause_queue(queue);
153 spin_unlock(&queue->tx_lock);
154
155 goto exit_free_skb;
156 }
157
158 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
159 goto exit_free_skb;
160 }
161
162 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false)))
163 goto exit_free_skb;
164
165 /*
166 * Pausing queue has to be serialized with rt2x00lib_txdone(). Note
167 * we should not use spin_lock_bh variant as bottom halve was already
168 * disabled before ieee80211_xmit() call.
169 */
170 spin_lock(&queue->tx_lock);
171 if (rt2x00queue_threshold(queue))
172 rt2x00queue_pause_queue(queue);
173 spin_unlock(&queue->tx_lock);
174
175 return;
176
177 exit_free_skb:
178 ieee80211_free_txskb(hw, skb);
179 }
180 EXPORT_SYMBOL_GPL(rt2x00mac_tx);
181
rt2x00mac_start(struct ieee80211_hw * hw)182 int rt2x00mac_start(struct ieee80211_hw *hw)
183 {
184 struct rt2x00_dev *rt2x00dev = hw->priv;
185
186 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
187 return 0;
188
189 return rt2x00lib_start(rt2x00dev);
190 }
191 EXPORT_SYMBOL_GPL(rt2x00mac_start);
192
rt2x00mac_stop(struct ieee80211_hw * hw)193 void rt2x00mac_stop(struct ieee80211_hw *hw)
194 {
195 struct rt2x00_dev *rt2x00dev = hw->priv;
196
197 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
198 return;
199
200 rt2x00lib_stop(rt2x00dev);
201 }
202 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
203
rt2x00mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)204 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif)
206 {
207 struct rt2x00_dev *rt2x00dev = hw->priv;
208 struct rt2x00_intf *intf = vif_to_intf(vif);
209 struct data_queue *queue = rt2x00dev->bcn;
210 struct queue_entry *entry = NULL;
211 unsigned int i;
212
213 /*
214 * Don't allow interfaces to be added
215 * the device has disappeared.
216 */
217 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
218 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
219 return -ENODEV;
220
221 /*
222 * Loop through all beacon queues to find a free
223 * entry. Since there are as much beacon entries
224 * as the maximum interfaces, this search shouldn't
225 * fail.
226 */
227 for (i = 0; i < queue->limit; i++) {
228 entry = &queue->entries[i];
229 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags))
230 break;
231 }
232
233 if (unlikely(i == queue->limit))
234 return -ENOBUFS;
235
236 /*
237 * We are now absolutely sure the interface can be created,
238 * increase interface count and start initialization.
239 */
240
241 if (vif->type == NL80211_IFTYPE_AP)
242 rt2x00dev->intf_ap_count++;
243 else
244 rt2x00dev->intf_sta_count++;
245
246 mutex_init(&intf->beacon_skb_mutex);
247 intf->beacon = entry;
248
249 /*
250 * The MAC address must be configured after the device
251 * has been initialized. Otherwise the device can reset
252 * the MAC registers.
253 * The BSSID address must only be configured in AP mode,
254 * however we should not send an empty BSSID address for
255 * STA interfaces at this time, since this can cause
256 * invalid behavior in the device.
257 */
258 rt2x00lib_config_intf(rt2x00dev, intf, vif->type,
259 vif->addr, NULL);
260
261 /*
262 * Some filters depend on the current working mode. We can force
263 * an update during the next configure_filter() run by mac80211 by
264 * resetting the current packet_filter state.
265 */
266 rt2x00dev->packet_filter = 0;
267
268 return 0;
269 }
270 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
271
rt2x00mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)272 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
273 struct ieee80211_vif *vif)
274 {
275 struct rt2x00_dev *rt2x00dev = hw->priv;
276 struct rt2x00_intf *intf = vif_to_intf(vif);
277
278 /*
279 * Don't allow interfaces to be remove while
280 * either the device has disappeared or when
281 * no interface is present.
282 */
283 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
284 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) ||
285 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count))
286 return;
287
288 if (vif->type == NL80211_IFTYPE_AP)
289 rt2x00dev->intf_ap_count--;
290 else
291 rt2x00dev->intf_sta_count--;
292
293 /*
294 * Release beacon entry so it is available for
295 * new interfaces again.
296 */
297 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags);
298
299 /*
300 * Make sure the bssid and mac address registers
301 * are cleared to prevent false ACKing of frames.
302 */
303 rt2x00lib_config_intf(rt2x00dev, intf,
304 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL);
305 }
306 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
307
rt2x00mac_config(struct ieee80211_hw * hw,u32 changed)308 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
309 {
310 struct rt2x00_dev *rt2x00dev = hw->priv;
311 struct ieee80211_conf *conf = &hw->conf;
312
313 /*
314 * mac80211 might be calling this function while we are trying
315 * to remove the device or perhaps suspending it.
316 */
317 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
318 return 0;
319
320 /*
321 * Some configuration parameters (e.g. channel and antenna values) can
322 * only be set when the radio is enabled, but do require the RX to
323 * be off. During this period we should keep link tuning enabled,
324 * if for any reason the link tuner must be reset, this will be
325 * handled by rt2x00lib_config().
326 */
327 rt2x00queue_stop_queue(rt2x00dev->rx);
328
329 /*
330 * When we've just turned on the radio, we want to reprogram
331 * everything to ensure a consistent state
332 */
333 rt2x00lib_config(rt2x00dev, conf, changed);
334
335 /*
336 * After the radio has been enabled we need to configure
337 * the antenna to the default settings. rt2x00lib_config_antenna()
338 * should determine if any action should be taken based on
339 * checking if diversity has been enabled or no antenna changes
340 * have been made since the last configuration change.
341 */
342 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant);
343
344 /* Turn RX back on */
345 rt2x00queue_start_queue(rt2x00dev->rx);
346
347 return 0;
348 }
349 EXPORT_SYMBOL_GPL(rt2x00mac_config);
350
rt2x00mac_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)351 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
352 unsigned int changed_flags,
353 unsigned int *total_flags,
354 u64 multicast)
355 {
356 struct rt2x00_dev *rt2x00dev = hw->priv;
357
358 /*
359 * Mask off any flags we are going to ignore
360 * from the total_flags field.
361 */
362 *total_flags &=
363 FIF_ALLMULTI |
364 FIF_FCSFAIL |
365 FIF_PLCPFAIL |
366 FIF_CONTROL |
367 FIF_PSPOLL |
368 FIF_OTHER_BSS;
369
370 /*
371 * Apply some rules to the filters:
372 * - Some filters imply different filters to be set.
373 * - Some things we can't filter out at all.
374 * - Multicast filter seems to kill broadcast traffic so never use it.
375 */
376 *total_flags |= FIF_ALLMULTI;
377
378 /*
379 * If the device has a single filter for all control frames,
380 * FIF_CONTROL and FIF_PSPOLL flags imply each other.
381 * And if the device has more than one filter for control frames
382 * of different types, but has no a separate filter for PS Poll frames,
383 * FIF_CONTROL flag implies FIF_PSPOLL.
384 */
385 if (!rt2x00_has_cap_control_filters(rt2x00dev)) {
386 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL)
387 *total_flags |= FIF_CONTROL | FIF_PSPOLL;
388 }
389 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) {
390 if (*total_flags & FIF_CONTROL)
391 *total_flags |= FIF_PSPOLL;
392 }
393
394 rt2x00dev->packet_filter = *total_flags;
395
396 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags);
397 }
398 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter);
399
rt2x00mac_set_tim_iter(void * data,u8 * mac,struct ieee80211_vif * vif)400 static void rt2x00mac_set_tim_iter(void *data, u8 *mac,
401 struct ieee80211_vif *vif)
402 {
403 struct rt2x00_intf *intf = vif_to_intf(vif);
404
405 if (vif->type != NL80211_IFTYPE_AP &&
406 vif->type != NL80211_IFTYPE_ADHOC &&
407 vif->type != NL80211_IFTYPE_MESH_POINT &&
408 vif->type != NL80211_IFTYPE_WDS)
409 return;
410
411 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags);
412 }
413
rt2x00mac_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)414 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
415 bool set)
416 {
417 struct rt2x00_dev *rt2x00dev = hw->priv;
418
419 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
420 return 0;
421
422 ieee80211_iterate_active_interfaces_atomic(
423 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
424 rt2x00mac_set_tim_iter, rt2x00dev);
425
426 /* queue work to upodate the beacon template */
427 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work);
428 return 0;
429 }
430 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim);
431
432 #ifdef CONFIG_RT2X00_LIB_CRYPTO
memcpy_tkip(struct rt2x00lib_crypto * crypto,u8 * key,u8 key_len)433 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len)
434 {
435 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY)
436 memcpy(crypto->key,
437 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY],
438 sizeof(crypto->key));
439
440 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY)
441 memcpy(crypto->tx_mic,
442 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
443 sizeof(crypto->tx_mic));
444
445 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY)
446 memcpy(crypto->rx_mic,
447 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
448 sizeof(crypto->rx_mic));
449 }
450
rt2x00mac_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)451 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
452 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
453 struct ieee80211_key_conf *key)
454 {
455 struct rt2x00_dev *rt2x00dev = hw->priv;
456 int (*set_key) (struct rt2x00_dev *rt2x00dev,
457 struct rt2x00lib_crypto *crypto,
458 struct ieee80211_key_conf *key);
459 struct rt2x00lib_crypto crypto;
460 static const u8 bcast_addr[ETH_ALEN] =
461 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
462 struct rt2x00_sta *sta_priv = NULL;
463
464 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
465 return 0;
466
467 if (!rt2x00_has_cap_hw_crypto(rt2x00dev))
468 return -EOPNOTSUPP;
469
470 /*
471 * To support IBSS RSN, don't program group keys in IBSS, the
472 * hardware will then not attempt to decrypt the frames.
473 */
474 if (vif->type == NL80211_IFTYPE_ADHOC &&
475 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
476 return -EOPNOTSUPP;
477
478 if (key->keylen > 32)
479 return -ENOSPC;
480
481 memset(&crypto, 0, sizeof(crypto));
482
483 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif);
484 crypto.cipher = rt2x00crypto_key_to_cipher(key);
485 if (crypto.cipher == CIPHER_NONE)
486 return -EOPNOTSUPP;
487 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev))
488 return -EOPNOTSUPP;
489
490 crypto.cmd = cmd;
491
492 if (sta) {
493 crypto.address = sta->addr;
494 sta_priv = sta_to_rt2x00_sta(sta);
495 crypto.wcid = sta_priv->wcid;
496 } else
497 crypto.address = bcast_addr;
498
499 if (crypto.cipher == CIPHER_TKIP)
500 memcpy_tkip(&crypto, &key->key[0], key->keylen);
501 else
502 memcpy(crypto.key, &key->key[0], key->keylen);
503 /*
504 * Each BSS has a maximum of 4 shared keys.
505 * Shared key index values:
506 * 0) BSS0 key0
507 * 1) BSS0 key1
508 * ...
509 * 4) BSS1 key0
510 * ...
511 * 8) BSS2 key0
512 * ...
513 * Both pairwise as shared key indeces are determined by
514 * driver. This is required because the hardware requires
515 * keys to be assigned in correct order (When key 1 is
516 * provided but key 0 is not, then the key is not found
517 * by the hardware during RX).
518 */
519 if (cmd == SET_KEY)
520 key->hw_key_idx = 0;
521
522 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
523 set_key = rt2x00dev->ops->lib->config_pairwise_key;
524 else
525 set_key = rt2x00dev->ops->lib->config_shared_key;
526
527 if (!set_key)
528 return -EOPNOTSUPP;
529
530 return set_key(rt2x00dev, &crypto, key);
531 }
532 EXPORT_SYMBOL_GPL(rt2x00mac_set_key);
533 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
534
rt2x00mac_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)535 int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
536 struct ieee80211_sta *sta)
537 {
538 struct rt2x00_dev *rt2x00dev = hw->priv;
539
540 return rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta);
541 }
542 EXPORT_SYMBOL_GPL(rt2x00mac_sta_add);
543
rt2x00mac_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)544 int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
545 struct ieee80211_sta *sta)
546 {
547 struct rt2x00_dev *rt2x00dev = hw->priv;
548 struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);
549
550 return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta_priv->wcid);
551 }
552 EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove);
553
rt2x00mac_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)554 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
555 struct ieee80211_vif *vif,
556 const u8 *mac_addr)
557 {
558 struct rt2x00_dev *rt2x00dev = hw->priv;
559 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
560 rt2x00link_stop_tuner(rt2x00dev);
561 }
562 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start);
563
rt2x00mac_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)564 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
565 struct ieee80211_vif *vif)
566 {
567 struct rt2x00_dev *rt2x00dev = hw->priv;
568 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
569 rt2x00link_start_tuner(rt2x00dev);
570 }
571 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete);
572
rt2x00mac_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)573 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
574 struct ieee80211_low_level_stats *stats)
575 {
576 struct rt2x00_dev *rt2x00dev = hw->priv;
577
578 /*
579 * The dot11ACKFailureCount, dot11RTSFailureCount and
580 * dot11RTSSuccessCount are updated in interrupt time.
581 * dot11FCSErrorCount is updated in the link tuner.
582 */
583 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
584
585 return 0;
586 }
587 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
588
rt2x00mac_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changes)589 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
590 struct ieee80211_vif *vif,
591 struct ieee80211_bss_conf *bss_conf,
592 u32 changes)
593 {
594 struct rt2x00_dev *rt2x00dev = hw->priv;
595 struct rt2x00_intf *intf = vif_to_intf(vif);
596
597 /*
598 * mac80211 might be calling this function while we are trying
599 * to remove the device or perhaps suspending it.
600 */
601 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
602 return;
603
604 /*
605 * Update the BSSID.
606 */
607 if (changes & BSS_CHANGED_BSSID)
608 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL,
609 bss_conf->bssid);
610
611 /*
612 * Start/stop beaconing.
613 */
614 if (changes & BSS_CHANGED_BEACON_ENABLED) {
615 mutex_lock(&intf->beacon_skb_mutex);
616 if (!bss_conf->enable_beacon && intf->enable_beacon) {
617 rt2x00dev->intf_beaconing--;
618 intf->enable_beacon = false;
619
620 if (rt2x00dev->intf_beaconing == 0) {
621 /*
622 * Last beaconing interface disabled
623 * -> stop beacon queue.
624 */
625 rt2x00queue_stop_queue(rt2x00dev->bcn);
626 }
627 /*
628 * Clear beacon in the H/W for this vif. This is needed
629 * to disable beaconing on this particular interface
630 * and keep it running on other interfaces.
631 */
632 rt2x00queue_clear_beacon(rt2x00dev, vif);
633 } else if (bss_conf->enable_beacon && !intf->enable_beacon) {
634 rt2x00dev->intf_beaconing++;
635 intf->enable_beacon = true;
636 /*
637 * Upload beacon to the H/W. This is only required on
638 * USB devices. PCI devices fetch beacons periodically.
639 */
640 if (rt2x00_is_usb(rt2x00dev))
641 rt2x00queue_update_beacon(rt2x00dev, vif);
642
643 if (rt2x00dev->intf_beaconing == 1) {
644 /*
645 * First beaconing interface enabled
646 * -> start beacon queue.
647 */
648 rt2x00queue_start_queue(rt2x00dev->bcn);
649 }
650 }
651 mutex_unlock(&intf->beacon_skb_mutex);
652 }
653
654 /*
655 * When the association status has changed we must reset the link
656 * tuner counter. This is because some drivers determine if they
657 * should perform link tuning based on the number of seconds
658 * while associated or not associated.
659 */
660 if (changes & BSS_CHANGED_ASSOC) {
661 rt2x00dev->link.count = 0;
662
663 if (bss_conf->assoc)
664 rt2x00dev->intf_associated++;
665 else
666 rt2x00dev->intf_associated--;
667
668 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
669
670 clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags);
671 }
672
673 /*
674 * Check for access point which do not support 802.11e . We have to
675 * generate data frames sequence number in S/W for such AP, because
676 * of H/W bug.
677 */
678 if (changes & BSS_CHANGED_QOS && !bss_conf->qos)
679 set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags);
680
681 /*
682 * When the erp information has changed, we should perform
683 * additional configuration steps. For all other changes we are done.
684 */
685 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE |
686 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES |
687 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT))
688 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes);
689 }
690 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);
691
rt2x00mac_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue_idx,const struct ieee80211_tx_queue_params * params)692 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
693 struct ieee80211_vif *vif, u16 queue_idx,
694 const struct ieee80211_tx_queue_params *params)
695 {
696 struct rt2x00_dev *rt2x00dev = hw->priv;
697 struct data_queue *queue;
698
699 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx);
700 if (unlikely(!queue))
701 return -EINVAL;
702
703 /*
704 * The passed variables are stored as real value ((2^n)-1).
705 * Ralink registers require to know the bit number 'n'.
706 */
707 if (params->cw_min > 0)
708 queue->cw_min = fls(params->cw_min);
709 else
710 queue->cw_min = 5; /* cw_min: 2^5 = 32. */
711
712 if (params->cw_max > 0)
713 queue->cw_max = fls(params->cw_max);
714 else
715 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */
716
717 queue->aifs = params->aifs;
718 queue->txop = params->txop;
719
720 rt2x00_dbg(rt2x00dev,
721 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n",
722 queue_idx, queue->cw_min, queue->cw_max, queue->aifs,
723 queue->txop);
724
725 return 0;
726 }
727 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);
728
rt2x00mac_rfkill_poll(struct ieee80211_hw * hw)729 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw)
730 {
731 struct rt2x00_dev *rt2x00dev = hw->priv;
732 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
733
734 wiphy_rfkill_set_hw_state(hw->wiphy, !active);
735 }
736 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll);
737
rt2x00mac_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)738 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
739 u32 queues, bool drop)
740 {
741 struct rt2x00_dev *rt2x00dev = hw->priv;
742 struct data_queue *queue;
743
744 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
745 return;
746
747 tx_queue_for_each(rt2x00dev, queue)
748 rt2x00queue_flush_queue(queue, drop);
749 }
750 EXPORT_SYMBOL_GPL(rt2x00mac_flush);
751
rt2x00mac_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)752 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
753 {
754 struct rt2x00_dev *rt2x00dev = hw->priv;
755 struct link_ant *ant = &rt2x00dev->link.ant;
756 struct antenna_setup *def = &rt2x00dev->default_ant;
757 struct antenna_setup setup;
758
759 // The antenna value is not supposed to be 0,
760 // or exceed the maximum number of antenna's.
761 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3))
762 return -EINVAL;
763
764 // When the client tried to configure the antenna to or from
765 // diversity mode, we must reset the default antenna as well
766 // as that controls the diversity switch.
767 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3)
768 ant->flags &= ~ANTENNA_TX_DIVERSITY;
769 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3)
770 ant->flags &= ~ANTENNA_RX_DIVERSITY;
771
772 // If diversity is being enabled, check if we need hardware
773 // or software diversity. In the latter case, reset the value,
774 // and make sure we update the antenna flags to have the
775 // link tuner pick up the diversity tuning.
776 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) {
777 tx_ant = ANTENNA_SW_DIVERSITY;
778 ant->flags |= ANTENNA_TX_DIVERSITY;
779 }
780
781 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) {
782 rx_ant = ANTENNA_SW_DIVERSITY;
783 ant->flags |= ANTENNA_RX_DIVERSITY;
784 }
785
786 setup.tx = tx_ant;
787 setup.rx = rx_ant;
788 setup.rx_chain_num = 0;
789 setup.tx_chain_num = 0;
790
791 rt2x00lib_config_antenna(rt2x00dev, setup);
792
793 return 0;
794 }
795 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna);
796
rt2x00mac_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)797 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
798 {
799 struct rt2x00_dev *rt2x00dev = hw->priv;
800 struct link_ant *ant = &rt2x00dev->link.ant;
801 struct antenna_setup *active = &rt2x00dev->link.ant.active;
802
803 // When software diversity is active, we must report this to the
804 // client and not the current active antenna state.
805 if (ant->flags & ANTENNA_TX_DIVERSITY)
806 *tx_ant = ANTENNA_HW_DIVERSITY;
807 else
808 *tx_ant = active->tx;
809
810 if (ant->flags & ANTENNA_RX_DIVERSITY)
811 *rx_ant = ANTENNA_HW_DIVERSITY;
812 else
813 *rx_ant = active->rx;
814
815 return 0;
816 }
817 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna);
818
rt2x00mac_get_ringparam(struct ieee80211_hw * hw,u32 * tx,u32 * tx_max,u32 * rx,u32 * rx_max)819 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
820 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
821 {
822 struct rt2x00_dev *rt2x00dev = hw->priv;
823 struct data_queue *queue;
824
825 tx_queue_for_each(rt2x00dev, queue) {
826 *tx += queue->length;
827 *tx_max += queue->limit;
828 }
829
830 *rx = rt2x00dev->rx->length;
831 *rx_max = rt2x00dev->rx->limit;
832 }
833 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam);
834
rt2x00mac_tx_frames_pending(struct ieee80211_hw * hw)835 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw)
836 {
837 struct rt2x00_dev *rt2x00dev = hw->priv;
838 struct data_queue *queue;
839
840 tx_queue_for_each(rt2x00dev, queue) {
841 if (!rt2x00queue_empty(queue))
842 return true;
843 }
844
845 return false;
846 }
847 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending);
848