1 /*
2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 /*
22 Module: rt2x00mac
23 Abstract: rt2x00 generic mac80211 routines.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28
29 #include "rt2x00.h"
30 #include "rt2x00lib.h"
31
rt2x00mac_tx_rts_cts(struct rt2x00_dev * rt2x00dev,struct data_queue * queue,struct sk_buff * frag_skb)32 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
33 struct data_queue *queue,
34 struct sk_buff *frag_skb)
35 {
36 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb);
37 struct ieee80211_tx_info *rts_info;
38 struct sk_buff *skb;
39 unsigned int data_length;
40 int retval = 0;
41
42 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
43 data_length = sizeof(struct ieee80211_cts);
44 else
45 data_length = sizeof(struct ieee80211_rts);
46
47 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom);
48 if (unlikely(!skb)) {
49 WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n");
50 return -ENOMEM;
51 }
52
53 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
54 skb_put(skb, data_length);
55
56 /*
57 * Copy TX information over from original frame to
58 * RTS/CTS frame. Note that we set the no encryption flag
59 * since we don't want this frame to be encrypted.
60 * RTS frames should be acked, while CTS-to-self frames
61 * should not. The ready for TX flag is cleared to prevent
62 * it being automatically send when the descriptor is
63 * written to the hardware.
64 */
65 memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb));
66 rts_info = IEEE80211_SKB_CB(skb);
67 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS;
68 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT;
69 rts_info->flags &= ~IEEE80211_TX_CTL_REQ_TX_STATUS;
70
71 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
72 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK;
73 else
74 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
75
76 skb->do_not_encrypt = 1;
77
78 /*
79 * RTS/CTS frame should use the length of the frame plus any
80 * encryption overhead that will be added by the hardware.
81 */
82 if (!frag_skb->do_not_encrypt)
83 data_length += rt2x00crypto_tx_overhead(tx_info);
84
85 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
86 ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif,
87 frag_skb->data, data_length, tx_info,
88 (struct ieee80211_cts *)(skb->data));
89 else
90 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif,
91 frag_skb->data, data_length, tx_info,
92 (struct ieee80211_rts *)(skb->data));
93
94 retval = rt2x00queue_write_tx_frame(queue, skb);
95 if (retval) {
96 dev_kfree_skb_any(skb);
97 WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n");
98 }
99
100 return retval;
101 }
102
rt2x00mac_tx(struct ieee80211_hw * hw,struct sk_buff * skb)103 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
104 {
105 struct rt2x00_dev *rt2x00dev = hw->priv;
106 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
107 struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
108 enum data_queue_qid qid = skb_get_queue_mapping(skb);
109 struct data_queue *queue;
110 u16 frame_control;
111
112 /*
113 * Mac80211 might be calling this function while we are trying
114 * to remove the device or perhaps suspending it.
115 * Note that we can only stop the TX queues inside the TX path
116 * due to possible race conditions in mac80211.
117 */
118 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
119 goto exit_fail;
120
121 /*
122 * Determine which queue to put packet on.
123 */
124 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
125 test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags))
126 queue = rt2x00queue_get_queue(rt2x00dev, QID_ATIM);
127 else
128 queue = rt2x00queue_get_queue(rt2x00dev, qid);
129 if (unlikely(!queue)) {
130 ERROR(rt2x00dev,
131 "Attempt to send packet over invalid queue %d.\n"
132 "Please file bug report to %s.\n", qid, DRV_PROJECT);
133 goto exit_fail;
134 }
135
136 /*
137 * If CTS/RTS is required. create and queue that frame first.
138 * Make sure we have at least enough entries available to send
139 * this CTS/RTS frame as well as the data frame.
140 * Note that when the driver has set the set_rts_threshold()
141 * callback function it doesn't need software generation of
142 * either RTS or CTS-to-self frame and handles everything
143 * inside the hardware.
144 */
145 frame_control = le16_to_cpu(ieee80211hdr->frame_control);
146 if ((tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS |
147 IEEE80211_TX_RC_USE_CTS_PROTECT)) &&
148 !rt2x00dev->ops->hw->set_rts_threshold) {
149 if (rt2x00queue_available(queue) <= 1)
150 goto exit_fail;
151
152 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
153 goto exit_fail;
154 }
155
156 if (rt2x00queue_write_tx_frame(queue, skb))
157 goto exit_fail;
158
159 if (rt2x00queue_threshold(queue))
160 ieee80211_stop_queue(rt2x00dev->hw, qid);
161
162 return NETDEV_TX_OK;
163
164 exit_fail:
165 ieee80211_stop_queue(rt2x00dev->hw, qid);
166 dev_kfree_skb_any(skb);
167 return NETDEV_TX_OK;
168 }
169 EXPORT_SYMBOL_GPL(rt2x00mac_tx);
170
rt2x00mac_start(struct ieee80211_hw * hw)171 int rt2x00mac_start(struct ieee80211_hw *hw)
172 {
173 struct rt2x00_dev *rt2x00dev = hw->priv;
174
175 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
176 return 0;
177
178 return rt2x00lib_start(rt2x00dev);
179 }
180 EXPORT_SYMBOL_GPL(rt2x00mac_start);
181
rt2x00mac_stop(struct ieee80211_hw * hw)182 void rt2x00mac_stop(struct ieee80211_hw *hw)
183 {
184 struct rt2x00_dev *rt2x00dev = hw->priv;
185
186 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
187 return;
188
189 rt2x00lib_stop(rt2x00dev);
190 }
191 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
192
rt2x00mac_add_interface(struct ieee80211_hw * hw,struct ieee80211_if_init_conf * conf)193 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
194 struct ieee80211_if_init_conf *conf)
195 {
196 struct rt2x00_dev *rt2x00dev = hw->priv;
197 struct rt2x00_intf *intf = vif_to_intf(conf->vif);
198 struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, QID_BEACON);
199 struct queue_entry *entry = NULL;
200 unsigned int i;
201
202 /*
203 * Don't allow interfaces to be added
204 * the device has disappeared.
205 */
206 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
207 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
208 return -ENODEV;
209
210 switch (conf->type) {
211 case NL80211_IFTYPE_AP:
212 /*
213 * We don't support mixed combinations of
214 * sta and ap interfaces.
215 */
216 if (rt2x00dev->intf_sta_count)
217 return -ENOBUFS;
218
219 /*
220 * Check if we exceeded the maximum amount
221 * of supported interfaces.
222 */
223 if (rt2x00dev->intf_ap_count >= rt2x00dev->ops->max_ap_intf)
224 return -ENOBUFS;
225
226 break;
227 case NL80211_IFTYPE_STATION:
228 case NL80211_IFTYPE_ADHOC:
229 /*
230 * We don't support mixed combinations of
231 * sta and ap interfaces.
232 */
233 if (rt2x00dev->intf_ap_count)
234 return -ENOBUFS;
235
236 /*
237 * Check if we exceeded the maximum amount
238 * of supported interfaces.
239 */
240 if (rt2x00dev->intf_sta_count >= rt2x00dev->ops->max_sta_intf)
241 return -ENOBUFS;
242
243 break;
244 default:
245 return -EINVAL;
246 }
247
248 /*
249 * Loop through all beacon queues to find a free
250 * entry. Since there are as much beacon entries
251 * as the maximum interfaces, this search shouldn't
252 * fail.
253 */
254 for (i = 0; i < queue->limit; i++) {
255 entry = &queue->entries[i];
256 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags))
257 break;
258 }
259
260 if (unlikely(i == queue->limit))
261 return -ENOBUFS;
262
263 /*
264 * We are now absolutely sure the interface can be created,
265 * increase interface count and start initialization.
266 */
267
268 if (conf->type == NL80211_IFTYPE_AP)
269 rt2x00dev->intf_ap_count++;
270 else
271 rt2x00dev->intf_sta_count++;
272
273 spin_lock_init(&intf->lock);
274 spin_lock_init(&intf->seqlock);
275 intf->beacon = entry;
276
277 if (conf->type == NL80211_IFTYPE_AP)
278 memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN);
279 memcpy(&intf->mac, conf->mac_addr, ETH_ALEN);
280
281 /*
282 * The MAC adddress must be configured after the device
283 * has been initialized. Otherwise the device can reset
284 * the MAC registers.
285 */
286 rt2x00lib_config_intf(rt2x00dev, intf, conf->type, intf->mac, NULL);
287
288 /*
289 * Some filters depend on the current working mode. We can force
290 * an update during the next configure_filter() run by mac80211 by
291 * resetting the current packet_filter state.
292 */
293 rt2x00dev->packet_filter = 0;
294
295 return 0;
296 }
297 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
298
rt2x00mac_remove_interface(struct ieee80211_hw * hw,struct ieee80211_if_init_conf * conf)299 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
300 struct ieee80211_if_init_conf *conf)
301 {
302 struct rt2x00_dev *rt2x00dev = hw->priv;
303 struct rt2x00_intf *intf = vif_to_intf(conf->vif);
304
305 /*
306 * Don't allow interfaces to be remove while
307 * either the device has disappeared or when
308 * no interface is present.
309 */
310 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
311 (conf->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) ||
312 (conf->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count))
313 return;
314
315 if (conf->type == NL80211_IFTYPE_AP)
316 rt2x00dev->intf_ap_count--;
317 else
318 rt2x00dev->intf_sta_count--;
319
320 /*
321 * Release beacon entry so it is available for
322 * new interfaces again.
323 */
324 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags);
325
326 /*
327 * Make sure the bssid and mac address registers
328 * are cleared to prevent false ACKing of frames.
329 */
330 rt2x00lib_config_intf(rt2x00dev, intf,
331 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL);
332 }
333 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
334
rt2x00mac_config(struct ieee80211_hw * hw,u32 changed)335 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
336 {
337 struct rt2x00_dev *rt2x00dev = hw->priv;
338 struct ieee80211_conf *conf = &hw->conf;
339 int status;
340
341 /*
342 * Mac80211 might be calling this function while we are trying
343 * to remove the device or perhaps suspending it.
344 */
345 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
346 return 0;
347
348 /*
349 * Only change device state when the radio is enabled. It does not
350 * matter what parameters we have configured when the radio is disabled
351 * because we won't be able to send or receive anyway. Also note that
352 * some configuration parameters (e.g. channel and antenna values) can
353 * only be set when the radio is enabled.
354 */
355 if (conf->radio_enabled) {
356 /* For programming the values, we have to turn RX off */
357 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
358
359 /* Enable the radio */
360 status = rt2x00lib_enable_radio(rt2x00dev);
361 if (unlikely(status))
362 return status;
363
364 /*
365 * When we've just turned on the radio, we want to reprogram
366 * everything to ensure a consistent state
367 */
368 rt2x00lib_config(rt2x00dev, conf, changed);
369
370 /*
371 * The radio was enabled, configure the antenna to the
372 * default settings, the link tuner will later start
373 * continue configuring the antenna based on the software
374 * diversity. But for non-diversity configurations, we need
375 * to have configured the correct state now.
376 */
377 if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED)
378 rt2x00lib_config_antenna(rt2x00dev,
379 &rt2x00dev->default_ant);
380
381 /* Turn RX back on */
382 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
383 } else {
384 /* Disable the radio */
385 rt2x00lib_disable_radio(rt2x00dev);
386 }
387
388 return 0;
389 }
390 EXPORT_SYMBOL_GPL(rt2x00mac_config);
391
rt2x00mac_config_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_if_conf * conf)392 int rt2x00mac_config_interface(struct ieee80211_hw *hw,
393 struct ieee80211_vif *vif,
394 struct ieee80211_if_conf *conf)
395 {
396 struct rt2x00_dev *rt2x00dev = hw->priv;
397 struct rt2x00_intf *intf = vif_to_intf(vif);
398 int update_bssid = 0;
399 int status = 0;
400
401 /*
402 * Mac80211 might be calling this function while we are trying
403 * to remove the device or perhaps suspending it.
404 */
405 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
406 return 0;
407
408 spin_lock(&intf->lock);
409
410 /*
411 * conf->bssid can be NULL if coming from the internal
412 * beacon update routine.
413 */
414 if (conf->changed & IEEE80211_IFCC_BSSID && conf->bssid) {
415 update_bssid = 1;
416 memcpy(&intf->bssid, conf->bssid, ETH_ALEN);
417 }
418
419 spin_unlock(&intf->lock);
420
421 /*
422 * Call rt2x00_config_intf() outside of the spinlock context since
423 * the call will sleep for USB drivers. By using the ieee80211_if_conf
424 * values as arguments we make keep access to rt2x00_intf thread safe
425 * even without the lock.
426 */
427 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL,
428 update_bssid ? conf->bssid : NULL);
429
430 /*
431 * Update the beacon.
432 */
433 if (conf->changed & IEEE80211_IFCC_BEACON)
434 status = rt2x00queue_update_beacon(rt2x00dev, vif);
435
436 return status;
437 }
438 EXPORT_SYMBOL_GPL(rt2x00mac_config_interface);
439
rt2x00mac_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,int mc_count,struct dev_addr_list * mc_list)440 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
441 unsigned int changed_flags,
442 unsigned int *total_flags,
443 int mc_count, struct dev_addr_list *mc_list)
444 {
445 struct rt2x00_dev *rt2x00dev = hw->priv;
446
447 /*
448 * Mask off any flags we are going to ignore
449 * from the total_flags field.
450 */
451 *total_flags &=
452 FIF_ALLMULTI |
453 FIF_FCSFAIL |
454 FIF_PLCPFAIL |
455 FIF_CONTROL |
456 FIF_OTHER_BSS |
457 FIF_PROMISC_IN_BSS;
458
459 /*
460 * Apply some rules to the filters:
461 * - Some filters imply different filters to be set.
462 * - Some things we can't filter out at all.
463 * - Multicast filter seems to kill broadcast traffic so never use it.
464 */
465 *total_flags |= FIF_ALLMULTI;
466 if (*total_flags & FIF_OTHER_BSS ||
467 *total_flags & FIF_PROMISC_IN_BSS)
468 *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;
469
470 /*
471 * Check if there is any work left for us.
472 */
473 if (rt2x00dev->packet_filter == *total_flags)
474 return;
475 rt2x00dev->packet_filter = *total_flags;
476
477 if (!test_bit(DRIVER_REQUIRE_SCHEDULED, &rt2x00dev->flags))
478 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags);
479 else
480 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->filter_work);
481 }
482 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter);
483
484 #ifdef CONFIG_RT2X00_LIB_CRYPTO
rt2x00mac_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,const u8 * local_address,const u8 * address,struct ieee80211_key_conf * key)485 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
486 const u8 *local_address, const u8 *address,
487 struct ieee80211_key_conf *key)
488 {
489 struct rt2x00_dev *rt2x00dev = hw->priv;
490 struct ieee80211_sta *sta;
491 int (*set_key) (struct rt2x00_dev *rt2x00dev,
492 struct rt2x00lib_crypto *crypto,
493 struct ieee80211_key_conf *key);
494 struct rt2x00lib_crypto crypto;
495
496 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
497 return 0;
498 else if (!test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
499 return -EOPNOTSUPP;
500 else if (key->keylen > 32)
501 return -ENOSPC;
502
503 memset(&crypto, 0, sizeof(crypto));
504
505 /*
506 * When in STA mode, bssidx is always 0 otherwise local_address[5]
507 * contains the bss number, see BSS_ID_MASK comments for details.
508 */
509 if (rt2x00dev->intf_sta_count)
510 crypto.bssidx = 0;
511 else
512 crypto.bssidx =
513 local_address[5] & (rt2x00dev->ops->max_ap_intf - 1);
514
515 crypto.cipher = rt2x00crypto_key_to_cipher(key);
516 if (crypto.cipher == CIPHER_NONE)
517 return -EOPNOTSUPP;
518
519 crypto.cmd = cmd;
520 crypto.address = address;
521
522 if (crypto.cipher == CIPHER_TKIP) {
523 if (key->keylen > NL80211_TKIP_DATA_OFFSET_ENCR_KEY)
524 memcpy(&crypto.key,
525 &key->key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY],
526 sizeof(crypto.key));
527
528 if (key->keylen > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY)
529 memcpy(&crypto.tx_mic,
530 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
531 sizeof(crypto.tx_mic));
532
533 if (key->keylen > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY)
534 memcpy(&crypto.rx_mic,
535 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
536 sizeof(crypto.rx_mic));
537 } else
538 memcpy(&crypto.key, &key->key[0], key->keylen);
539
540 /*
541 * Discover the Association ID from mac80211.
542 * Some drivers need this information when updating the
543 * hardware key (either adding or removing).
544 */
545 rcu_read_lock();
546 sta = ieee80211_find_sta(hw, address);
547 if (sta)
548 crypto.aid = sta->aid;
549 rcu_read_unlock();
550
551 /*
552 * Each BSS has a maximum of 4 shared keys.
553 * Shared key index values:
554 * 0) BSS0 key0
555 * 1) BSS0 key1
556 * ...
557 * 4) BSS1 key0
558 * ...
559 * 8) BSS2 key0
560 * ...
561 * Both pairwise as shared key indeces are determined by
562 * driver. This is required because the hardware requires
563 * keys to be assigned in correct order (When key 1 is
564 * provided but key 0 is not, then the key is not found
565 * by the hardware during RX).
566 */
567 if (cmd == SET_KEY)
568 key->hw_key_idx = 0;
569
570 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
571 set_key = rt2x00dev->ops->lib->config_pairwise_key;
572 else
573 set_key = rt2x00dev->ops->lib->config_shared_key;
574
575 if (!set_key)
576 return -EOPNOTSUPP;
577
578 return set_key(rt2x00dev, &crypto, key);
579 }
580 EXPORT_SYMBOL_GPL(rt2x00mac_set_key);
581 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
582
rt2x00mac_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)583 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
584 struct ieee80211_low_level_stats *stats)
585 {
586 struct rt2x00_dev *rt2x00dev = hw->priv;
587
588 /*
589 * The dot11ACKFailureCount, dot11RTSFailureCount and
590 * dot11RTSSuccessCount are updated in interrupt time.
591 * dot11FCSErrorCount is updated in the link tuner.
592 */
593 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
594
595 return 0;
596 }
597 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
598
rt2x00mac_get_tx_stats(struct ieee80211_hw * hw,struct ieee80211_tx_queue_stats * stats)599 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
600 struct ieee80211_tx_queue_stats *stats)
601 {
602 struct rt2x00_dev *rt2x00dev = hw->priv;
603 unsigned int i;
604
605 for (i = 0; i < rt2x00dev->ops->tx_queues; i++) {
606 stats[i].len = rt2x00dev->tx[i].length;
607 stats[i].limit = rt2x00dev->tx[i].limit;
608 stats[i].count = rt2x00dev->tx[i].count;
609 }
610
611 return 0;
612 }
613 EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);
614
rt2x00mac_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changes)615 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
616 struct ieee80211_vif *vif,
617 struct ieee80211_bss_conf *bss_conf,
618 u32 changes)
619 {
620 struct rt2x00_dev *rt2x00dev = hw->priv;
621 struct rt2x00_intf *intf = vif_to_intf(vif);
622 unsigned int delayed = 0;
623
624 /*
625 * When the association status has changed we must reset the link
626 * tuner counter. This is because some drivers determine if they
627 * should perform link tuning based on the number of seconds
628 * while associated or not associated.
629 */
630 if (changes & BSS_CHANGED_ASSOC) {
631 rt2x00dev->link.count = 0;
632
633 if (bss_conf->assoc)
634 rt2x00dev->intf_associated++;
635 else
636 rt2x00dev->intf_associated--;
637
638 if (!test_bit(DRIVER_REQUIRE_SCHEDULED, &rt2x00dev->flags))
639 rt2x00leds_led_assoc(rt2x00dev,
640 !!rt2x00dev->intf_associated);
641 else
642 delayed |= DELAYED_LED_ASSOC;
643 }
644
645 /*
646 * When the erp information has changed, we should perform
647 * additional configuration steps. For all other changes we are done.
648 */
649 if (changes & ~(BSS_CHANGED_ASSOC | BSS_CHANGED_HT)) {
650 if (!test_bit(DRIVER_REQUIRE_SCHEDULED, &rt2x00dev->flags))
651 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf);
652 else
653 delayed |= DELAYED_CONFIG_ERP;
654 }
655
656 spin_lock(&intf->lock);
657 if (delayed) {
658 intf->delayed_flags |= delayed;
659 schedule_work(&rt2x00dev->intf_work);
660 }
661 spin_unlock(&intf->lock);
662 }
663 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);
664
rt2x00mac_conf_tx(struct ieee80211_hw * hw,u16 queue_idx,const struct ieee80211_tx_queue_params * params)665 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue_idx,
666 const struct ieee80211_tx_queue_params *params)
667 {
668 struct rt2x00_dev *rt2x00dev = hw->priv;
669 struct data_queue *queue;
670
671 queue = rt2x00queue_get_queue(rt2x00dev, queue_idx);
672 if (unlikely(!queue))
673 return -EINVAL;
674
675 /*
676 * The passed variables are stored as real value ((2^n)-1).
677 * Ralink registers require to know the bit number 'n'.
678 */
679 if (params->cw_min > 0)
680 queue->cw_min = fls(params->cw_min);
681 else
682 queue->cw_min = 5; /* cw_min: 2^5 = 32. */
683
684 if (params->cw_max > 0)
685 queue->cw_max = fls(params->cw_max);
686 else
687 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */
688
689 queue->aifs = params->aifs;
690 queue->txop = params->txop;
691
692 INFO(rt2x00dev,
693 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d.\n",
694 queue_idx, queue->cw_min, queue->cw_max, queue->aifs, queue->txop);
695
696 return 0;
697 }
698 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);
699