2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
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.
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.
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/>.
21 Abstract: rt2x00 generic mac80211 routines.
24 #include <linux/kernel.h>
25 #include <linux/module.h>
28 #include "rt2x00lib.h"
30 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
31 struct data_queue *queue,
32 struct sk_buff *frag_skb)
34 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb);
35 struct ieee80211_tx_info *rts_info;
37 unsigned int data_length;
40 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
41 data_length = sizeof(struct ieee80211_cts);
43 data_length = sizeof(struct ieee80211_rts);
45 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom);
47 rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n");
51 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
52 skb_put(skb, data_length);
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.
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;
68 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
69 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK;
71 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
73 /* Disable hardware encryption */
74 rts_info->control.hw_key = NULL;
77 * RTS/CTS frame should use the length of the frame plus any
78 * encryption overhead that will be added by the hardware.
80 data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);
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));
87 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif,
88 frag_skb->data, data_length, tx_info,
89 (struct ieee80211_rts *)(skb->data));
91 retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true);
93 dev_kfree_skb_any(skb);
94 rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n");
100 void rt2x00mac_tx(struct ieee80211_hw *hw,
101 struct ieee80211_tx_control *control,
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;
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.
115 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
119 * Use the ATIM queue if appropriate and present.
121 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
122 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE))
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);
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.
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)
148 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
152 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false)))
156 * Pausing queue has to be serialized with rt2x00lib_txdone(). Note
157 * we should not use spin_lock_bh variant as bottom halve was already
158 * disabled before ieee80211_xmit() call.
160 spin_lock(&queue->tx_lock);
161 if (rt2x00queue_threshold(queue))
162 rt2x00queue_pause_queue(queue);
163 spin_unlock(&queue->tx_lock);
168 spin_lock(&queue->tx_lock);
169 rt2x00queue_pause_queue(queue);
170 spin_unlock(&queue->tx_lock);
172 ieee80211_free_txskb(hw, skb);
174 EXPORT_SYMBOL_GPL(rt2x00mac_tx);
176 int rt2x00mac_start(struct ieee80211_hw *hw)
178 struct rt2x00_dev *rt2x00dev = hw->priv;
180 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
183 return rt2x00lib_start(rt2x00dev);
185 EXPORT_SYMBOL_GPL(rt2x00mac_start);
187 void rt2x00mac_stop(struct ieee80211_hw *hw)
189 struct rt2x00_dev *rt2x00dev = hw->priv;
191 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
194 rt2x00lib_stop(rt2x00dev);
196 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
198 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
199 struct ieee80211_vif *vif)
201 struct rt2x00_dev *rt2x00dev = hw->priv;
202 struct rt2x00_intf *intf = vif_to_intf(vif);
203 struct data_queue *queue = rt2x00dev->bcn;
204 struct queue_entry *entry = NULL;
208 * Don't allow interfaces to be added
209 * the device has disappeared.
211 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
212 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
216 * Loop through all beacon queues to find a free
217 * entry. Since there are as much beacon entries
218 * as the maximum interfaces, this search shouldn't
221 for (i = 0; i < queue->limit; i++) {
222 entry = &queue->entries[i];
223 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags))
227 if (unlikely(i == queue->limit))
231 * We are now absolutely sure the interface can be created,
232 * increase interface count and start initialization.
235 if (vif->type == NL80211_IFTYPE_AP)
236 rt2x00dev->intf_ap_count++;
238 rt2x00dev->intf_sta_count++;
240 mutex_init(&intf->beacon_skb_mutex);
241 intf->beacon = entry;
244 * The MAC address must be configured after the device
245 * has been initialized. Otherwise the device can reset
247 * The BSSID address must only be configured in AP mode,
248 * however we should not send an empty BSSID address for
249 * STA interfaces at this time, since this can cause
250 * invalid behavior in the device.
252 rt2x00lib_config_intf(rt2x00dev, intf, vif->type,
256 * Some filters depend on the current working mode. We can force
257 * an update during the next configure_filter() run by mac80211 by
258 * resetting the current packet_filter state.
260 rt2x00dev->packet_filter = 0;
264 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
266 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
267 struct ieee80211_vif *vif)
269 struct rt2x00_dev *rt2x00dev = hw->priv;
270 struct rt2x00_intf *intf = vif_to_intf(vif);
273 * Don't allow interfaces to be remove while
274 * either the device has disappeared or when
275 * no interface is present.
277 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
278 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) ||
279 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count))
282 if (vif->type == NL80211_IFTYPE_AP)
283 rt2x00dev->intf_ap_count--;
285 rt2x00dev->intf_sta_count--;
288 * Release beacon entry so it is available for
289 * new interfaces again.
291 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags);
294 * Make sure the bssid and mac address registers
295 * are cleared to prevent false ACKing of frames.
297 rt2x00lib_config_intf(rt2x00dev, intf,
298 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL);
300 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
302 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
304 struct rt2x00_dev *rt2x00dev = hw->priv;
305 struct ieee80211_conf *conf = &hw->conf;
308 * mac80211 might be calling this function while we are trying
309 * to remove the device or perhaps suspending it.
311 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
315 * Some configuration parameters (e.g. channel and antenna values) can
316 * only be set when the radio is enabled, but do require the RX to
317 * be off. During this period we should keep link tuning enabled,
318 * if for any reason the link tuner must be reset, this will be
319 * handled by rt2x00lib_config().
321 rt2x00queue_stop_queue(rt2x00dev->rx);
324 * When we've just turned on the radio, we want to reprogram
325 * everything to ensure a consistent state
327 rt2x00lib_config(rt2x00dev, conf, changed);
330 * After the radio has been enabled we need to configure
331 * the antenna to the default settings. rt2x00lib_config_antenna()
332 * should determine if any action should be taken based on
333 * checking if diversity has been enabled or no antenna changes
334 * have been made since the last configuration change.
336 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant);
338 /* Turn RX back on */
339 rt2x00queue_start_queue(rt2x00dev->rx);
343 EXPORT_SYMBOL_GPL(rt2x00mac_config);
345 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
346 unsigned int changed_flags,
347 unsigned int *total_flags,
350 struct rt2x00_dev *rt2x00dev = hw->priv;
353 * Mask off any flags we are going to ignore
354 * from the total_flags field.
365 * Apply some rules to the filters:
366 * - Some filters imply different filters to be set.
367 * - Some things we can't filter out at all.
368 * - Multicast filter seems to kill broadcast traffic so never use it.
370 *total_flags |= FIF_ALLMULTI;
373 * If the device has a single filter for all control frames,
374 * FIF_CONTROL and FIF_PSPOLL flags imply each other.
375 * And if the device has more than one filter for control frames
376 * of different types, but has no a separate filter for PS Poll frames,
377 * FIF_CONTROL flag implies FIF_PSPOLL.
379 if (!rt2x00_has_cap_control_filters(rt2x00dev)) {
380 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL)
381 *total_flags |= FIF_CONTROL | FIF_PSPOLL;
383 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) {
384 if (*total_flags & FIF_CONTROL)
385 *total_flags |= FIF_PSPOLL;
389 * Check if there is any work left for us.
391 if (rt2x00dev->packet_filter == *total_flags)
393 rt2x00dev->packet_filter = *total_flags;
395 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags);
397 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter);
399 static void rt2x00mac_set_tim_iter(void *data, u8 *mac,
400 struct ieee80211_vif *vif)
402 struct rt2x00_intf *intf = vif_to_intf(vif);
404 if (vif->type != NL80211_IFTYPE_AP &&
405 vif->type != NL80211_IFTYPE_ADHOC &&
406 vif->type != NL80211_IFTYPE_MESH_POINT &&
407 vif->type != NL80211_IFTYPE_WDS)
410 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags);
413 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
416 struct rt2x00_dev *rt2x00dev = hw->priv;
418 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
421 ieee80211_iterate_active_interfaces_atomic(
422 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
423 rt2x00mac_set_tim_iter, rt2x00dev);
425 /* queue work to upodate the beacon template */
426 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work);
429 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim);
431 #ifdef CONFIG_RT2X00_LIB_CRYPTO
432 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len)
434 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY)
436 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY],
437 sizeof(crypto->key));
439 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY)
440 memcpy(crypto->tx_mic,
441 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
442 sizeof(crypto->tx_mic));
444 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY)
445 memcpy(crypto->rx_mic,
446 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
447 sizeof(crypto->rx_mic));
450 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
451 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
452 struct ieee80211_key_conf *key)
454 struct rt2x00_dev *rt2x00dev = hw->priv;
455 int (*set_key) (struct rt2x00_dev *rt2x00dev,
456 struct rt2x00lib_crypto *crypto,
457 struct ieee80211_key_conf *key);
458 struct rt2x00lib_crypto crypto;
459 static const u8 bcast_addr[ETH_ALEN] =
460 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
461 struct rt2x00_sta *sta_priv = NULL;
463 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
466 if (!rt2x00_has_cap_hw_crypto(rt2x00dev))
470 * To support IBSS RSN, don't program group keys in IBSS, the
471 * hardware will then not attempt to decrypt the frames.
473 if (vif->type == NL80211_IFTYPE_ADHOC &&
474 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
477 if (key->keylen > 32)
480 memset(&crypto, 0, sizeof(crypto));
482 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif);
483 crypto.cipher = rt2x00crypto_key_to_cipher(key);
484 if (crypto.cipher == CIPHER_NONE)
486 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev))
492 crypto.address = sta->addr;
493 sta_priv = sta_to_rt2x00_sta(sta);
494 crypto.wcid = sta_priv->wcid;
496 crypto.address = bcast_addr;
498 if (crypto.cipher == CIPHER_TKIP)
499 memcpy_tkip(&crypto, &key->key[0], key->keylen);
501 memcpy(crypto.key, &key->key[0], key->keylen);
503 * Each BSS has a maximum of 4 shared keys.
504 * Shared key index values:
512 * Both pairwise as shared key indeces are determined by
513 * driver. This is required because the hardware requires
514 * keys to be assigned in correct order (When key 1 is
515 * provided but key 0 is not, then the key is not found
516 * by the hardware during RX).
521 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
522 set_key = rt2x00dev->ops->lib->config_pairwise_key;
524 set_key = rt2x00dev->ops->lib->config_shared_key;
529 return set_key(rt2x00dev, &crypto, key);
531 EXPORT_SYMBOL_GPL(rt2x00mac_set_key);
532 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
534 int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
535 struct ieee80211_sta *sta)
537 struct rt2x00_dev *rt2x00dev = hw->priv;
538 struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);
541 * If there's no space left in the device table store
542 * -1 as wcid but tell mac80211 everything went ok.
544 if (rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta))
549 EXPORT_SYMBOL_GPL(rt2x00mac_sta_add);
551 int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
552 struct ieee80211_sta *sta)
554 struct rt2x00_dev *rt2x00dev = hw->priv;
555 struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);
558 * If we never sent the STA to the device no need to clean it up.
560 if (sta_priv->wcid < 0)
563 return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta_priv->wcid);
565 EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove);
567 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
568 struct ieee80211_vif *vif,
571 struct rt2x00_dev *rt2x00dev = hw->priv;
572 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
573 rt2x00link_stop_tuner(rt2x00dev);
575 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start);
577 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
578 struct ieee80211_vif *vif)
580 struct rt2x00_dev *rt2x00dev = hw->priv;
581 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
582 rt2x00link_start_tuner(rt2x00dev);
584 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete);
586 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
587 struct ieee80211_low_level_stats *stats)
589 struct rt2x00_dev *rt2x00dev = hw->priv;
592 * The dot11ACKFailureCount, dot11RTSFailureCount and
593 * dot11RTSSuccessCount are updated in interrupt time.
594 * dot11FCSErrorCount is updated in the link tuner.
596 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
600 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
602 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
603 struct ieee80211_vif *vif,
604 struct ieee80211_bss_conf *bss_conf,
607 struct rt2x00_dev *rt2x00dev = hw->priv;
608 struct rt2x00_intf *intf = vif_to_intf(vif);
611 * mac80211 might be calling this function while we are trying
612 * to remove the device or perhaps suspending it.
614 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
620 if (changes & BSS_CHANGED_BSSID)
621 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL,
625 * Start/stop beaconing.
627 if (changes & BSS_CHANGED_BEACON_ENABLED) {
628 mutex_lock(&intf->beacon_skb_mutex);
629 if (!bss_conf->enable_beacon && intf->enable_beacon) {
630 rt2x00dev->intf_beaconing--;
631 intf->enable_beacon = false;
633 if (rt2x00dev->intf_beaconing == 0) {
635 * Last beaconing interface disabled
636 * -> stop beacon queue.
638 rt2x00queue_stop_queue(rt2x00dev->bcn);
641 * Clear beacon in the H/W for this vif. This is needed
642 * to disable beaconing on this particular interface
643 * and keep it running on other interfaces.
645 rt2x00queue_clear_beacon(rt2x00dev, vif);
646 } else if (bss_conf->enable_beacon && !intf->enable_beacon) {
647 rt2x00dev->intf_beaconing++;
648 intf->enable_beacon = true;
650 * Upload beacon to the H/W. This is only required on
651 * USB devices. PCI devices fetch beacons periodically.
653 if (rt2x00_is_usb(rt2x00dev))
654 rt2x00queue_update_beacon(rt2x00dev, vif);
656 if (rt2x00dev->intf_beaconing == 1) {
658 * First beaconing interface enabled
659 * -> start beacon queue.
661 rt2x00queue_start_queue(rt2x00dev->bcn);
664 mutex_unlock(&intf->beacon_skb_mutex);
668 * When the association status has changed we must reset the link
669 * tuner counter. This is because some drivers determine if they
670 * should perform link tuning based on the number of seconds
671 * while associated or not associated.
673 if (changes & BSS_CHANGED_ASSOC) {
674 rt2x00dev->link.count = 0;
677 rt2x00dev->intf_associated++;
679 rt2x00dev->intf_associated--;
681 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
683 clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags);
687 * Check for access point which do not support 802.11e . We have to
688 * generate data frames sequence number in S/W for such AP, because
691 if (changes & BSS_CHANGED_QOS && !bss_conf->qos)
692 set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags);
695 * When the erp information has changed, we should perform
696 * additional configuration steps. For all other changes we are done.
698 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE |
699 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES |
700 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT))
701 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes);
703 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);
705 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
706 struct ieee80211_vif *vif, u16 queue_idx,
707 const struct ieee80211_tx_queue_params *params)
709 struct rt2x00_dev *rt2x00dev = hw->priv;
710 struct data_queue *queue;
712 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx);
713 if (unlikely(!queue))
717 * The passed variables are stored as real value ((2^n)-1).
718 * Ralink registers require to know the bit number 'n'.
720 if (params->cw_min > 0)
721 queue->cw_min = fls(params->cw_min);
723 queue->cw_min = 5; /* cw_min: 2^5 = 32. */
725 if (params->cw_max > 0)
726 queue->cw_max = fls(params->cw_max);
728 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */
730 queue->aifs = params->aifs;
731 queue->txop = params->txop;
733 rt2x00_dbg(rt2x00dev,
734 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n",
735 queue_idx, queue->cw_min, queue->cw_max, queue->aifs,
740 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);
742 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw)
744 struct rt2x00_dev *rt2x00dev = hw->priv;
745 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
747 wiphy_rfkill_set_hw_state(hw->wiphy, !active);
749 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll);
751 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
752 u32 queues, bool drop)
754 struct rt2x00_dev *rt2x00dev = hw->priv;
755 struct data_queue *queue;
757 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
760 tx_queue_for_each(rt2x00dev, queue)
761 rt2x00queue_flush_queue(queue, drop);
763 EXPORT_SYMBOL_GPL(rt2x00mac_flush);
765 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
767 struct rt2x00_dev *rt2x00dev = hw->priv;
768 struct link_ant *ant = &rt2x00dev->link.ant;
769 struct antenna_setup *def = &rt2x00dev->default_ant;
770 struct antenna_setup setup;
772 // The antenna value is not supposed to be 0,
773 // or exceed the maximum number of antenna's.
774 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3))
777 // When the client tried to configure the antenna to or from
778 // diversity mode, we must reset the default antenna as well
779 // as that controls the diversity switch.
780 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3)
781 ant->flags &= ~ANTENNA_TX_DIVERSITY;
782 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3)
783 ant->flags &= ~ANTENNA_RX_DIVERSITY;
785 // If diversity is being enabled, check if we need hardware
786 // or software diversity. In the latter case, reset the value,
787 // and make sure we update the antenna flags to have the
788 // link tuner pick up the diversity tuning.
789 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) {
790 tx_ant = ANTENNA_SW_DIVERSITY;
791 ant->flags |= ANTENNA_TX_DIVERSITY;
794 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) {
795 rx_ant = ANTENNA_SW_DIVERSITY;
796 ant->flags |= ANTENNA_RX_DIVERSITY;
801 setup.rx_chain_num = 0;
802 setup.tx_chain_num = 0;
804 rt2x00lib_config_antenna(rt2x00dev, setup);
808 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna);
810 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
812 struct rt2x00_dev *rt2x00dev = hw->priv;
813 struct link_ant *ant = &rt2x00dev->link.ant;
814 struct antenna_setup *active = &rt2x00dev->link.ant.active;
816 // When software diversity is active, we must report this to the
817 // client and not the current active antenna state.
818 if (ant->flags & ANTENNA_TX_DIVERSITY)
819 *tx_ant = ANTENNA_HW_DIVERSITY;
821 *tx_ant = active->tx;
823 if (ant->flags & ANTENNA_RX_DIVERSITY)
824 *rx_ant = ANTENNA_HW_DIVERSITY;
826 *rx_ant = active->rx;
830 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna);
832 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
833 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
835 struct rt2x00_dev *rt2x00dev = hw->priv;
836 struct data_queue *queue;
838 tx_queue_for_each(rt2x00dev, queue) {
839 *tx += queue->length;
840 *tx_max += queue->limit;
843 *rx = rt2x00dev->rx->length;
844 *rx_max = rt2x00dev->rx->limit;
846 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam);
848 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw)
850 struct rt2x00_dev *rt2x00dev = hw->priv;
851 struct data_queue *queue;
853 tx_queue_for_each(rt2x00dev, queue) {
854 if (!rt2x00queue_empty(queue))
860 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending);