1 // SPDX-License-Identifier: GPL-2.0-or-later
3 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
10 Abstract: rt2x00 generic mac80211 routines.
13 #include <linux/kernel.h>
14 #include <linux/module.h>
17 #include "rt2x00lib.h"
19 static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
20 struct data_queue *queue,
21 struct sk_buff *frag_skb)
23 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb);
24 struct ieee80211_tx_info *rts_info;
26 unsigned int data_length;
29 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
30 data_length = sizeof(struct ieee80211_cts);
32 data_length = sizeof(struct ieee80211_rts);
34 skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom);
36 rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n");
40 skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom);
41 skb_put(skb, data_length);
44 * Copy TX information over from original frame to
45 * RTS/CTS frame. Note that we set the no encryption flag
46 * since we don't want this frame to be encrypted.
47 * RTS frames should be acked, while CTS-to-self frames
48 * should not. The ready for TX flag is cleared to prevent
49 * it being automatically send when the descriptor is
50 * written to the hardware.
52 memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb));
53 rts_info = IEEE80211_SKB_CB(skb);
54 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS;
55 rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT;
57 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
58 rts_info->flags |= IEEE80211_TX_CTL_NO_ACK;
60 rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
62 /* Disable hardware encryption */
63 rts_info->control.hw_key = NULL;
66 * RTS/CTS frame should use the length of the frame plus any
67 * encryption overhead that will be added by the hardware.
69 data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);
71 if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
72 ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif,
73 frag_skb->data, data_length, tx_info,
74 (struct ieee80211_cts *)(skb->data));
76 ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif,
77 frag_skb->data, data_length, tx_info,
78 (struct ieee80211_rts *)(skb->data));
80 retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true);
82 dev_kfree_skb_any(skb);
83 rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n");
89 void rt2x00mac_tx(struct ieee80211_hw *hw,
90 struct ieee80211_tx_control *control,
93 struct rt2x00_dev *rt2x00dev = hw->priv;
94 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
95 enum data_queue_qid qid = skb_get_queue_mapping(skb);
96 struct data_queue *queue = NULL;
99 * Mac80211 might be calling this function while we are trying
100 * to remove the device or perhaps suspending it.
101 * Note that we can only stop the TX queues inside the TX path
102 * due to possible race conditions in mac80211.
104 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
108 * Use the ATIM queue if appropriate and present.
110 if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
111 rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE))
114 queue = rt2x00queue_get_tx_queue(rt2x00dev, qid);
115 if (unlikely(!queue)) {
116 rt2x00_err(rt2x00dev,
117 "Attempt to send packet over invalid queue %d\n"
118 "Please file bug report to %s\n", qid, DRV_PROJECT);
123 * If CTS/RTS is required. create and queue that frame first.
124 * Make sure we have at least enough entries available to send
125 * this CTS/RTS frame as well as the data frame.
126 * Note that when the driver has set the set_rts_threshold()
127 * callback function it doesn't need software generation of
128 * either RTS or CTS-to-self frame and handles everything
129 * inside the hardware.
131 if (!rt2x00dev->ops->hw->set_rts_threshold &&
132 (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS |
133 IEEE80211_TX_RC_USE_CTS_PROTECT))) {
134 if (rt2x00queue_available(queue) <= 1) {
136 * Recheck for full queue under lock to avoid race
137 * conditions with rt2x00lib_txdone().
139 spin_lock(&queue->tx_lock);
140 if (rt2x00queue_threshold(queue))
141 rt2x00queue_pause_queue(queue);
142 spin_unlock(&queue->tx_lock);
147 if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb))
151 if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false)))
157 ieee80211_free_txskb(hw, skb);
159 EXPORT_SYMBOL_GPL(rt2x00mac_tx);
161 int rt2x00mac_start(struct ieee80211_hw *hw)
163 struct rt2x00_dev *rt2x00dev = hw->priv;
165 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
168 return rt2x00lib_start(rt2x00dev);
170 EXPORT_SYMBOL_GPL(rt2x00mac_start);
172 void rt2x00mac_stop(struct ieee80211_hw *hw)
174 struct rt2x00_dev *rt2x00dev = hw->priv;
176 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
179 rt2x00lib_stop(rt2x00dev);
181 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
183 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
184 struct ieee80211_vif *vif)
186 struct rt2x00_dev *rt2x00dev = hw->priv;
187 struct rt2x00_intf *intf = vif_to_intf(vif);
188 struct data_queue *queue = rt2x00dev->bcn;
189 struct queue_entry *entry = NULL;
193 * Don't allow interfaces to be added
194 * the device has disappeared.
196 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
197 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
201 * Loop through all beacon queues to find a free
202 * entry. Since there are as much beacon entries
203 * as the maximum interfaces, this search shouldn't
206 for (i = 0; i < queue->limit; i++) {
207 entry = &queue->entries[i];
208 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags))
212 if (unlikely(i == queue->limit))
216 * We are now absolutely sure the interface can be created,
217 * increase interface count and start initialization.
220 if (vif->type == NL80211_IFTYPE_AP)
221 rt2x00dev->intf_ap_count++;
223 rt2x00dev->intf_sta_count++;
225 mutex_init(&intf->beacon_skb_mutex);
226 intf->beacon = entry;
229 * The MAC address must be configured after the device
230 * has been initialized. Otherwise the device can reset
232 * The BSSID address must only be configured in AP mode,
233 * however we should not send an empty BSSID address for
234 * STA interfaces at this time, since this can cause
235 * invalid behavior in the device.
237 rt2x00lib_config_intf(rt2x00dev, intf, vif->type,
241 * Some filters depend on the current working mode. We can force
242 * an update during the next configure_filter() run by mac80211 by
243 * resetting the current packet_filter state.
245 rt2x00dev->packet_filter = 0;
249 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface);
251 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
252 struct ieee80211_vif *vif)
254 struct rt2x00_dev *rt2x00dev = hw->priv;
255 struct rt2x00_intf *intf = vif_to_intf(vif);
258 * Don't allow interfaces to be remove while
259 * either the device has disappeared or when
260 * no interface is present.
262 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
263 (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) ||
264 (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count))
267 if (vif->type == NL80211_IFTYPE_AP)
268 rt2x00dev->intf_ap_count--;
270 rt2x00dev->intf_sta_count--;
273 * Release beacon entry so it is available for
274 * new interfaces again.
276 clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags);
279 * Make sure the bssid and mac address registers
280 * are cleared to prevent false ACKing of frames.
282 rt2x00lib_config_intf(rt2x00dev, intf,
283 NL80211_IFTYPE_UNSPECIFIED, NULL, NULL);
285 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface);
287 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
289 struct rt2x00_dev *rt2x00dev = hw->priv;
290 struct ieee80211_conf *conf = &hw->conf;
293 * mac80211 might be calling this function while we are trying
294 * to remove the device or perhaps suspending it.
296 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
300 * Some configuration parameters (e.g. channel and antenna values) can
301 * only be set when the radio is enabled, but do require the RX to
302 * be off. During this period we should keep link tuning enabled,
303 * if for any reason the link tuner must be reset, this will be
304 * handled by rt2x00lib_config().
306 rt2x00queue_stop_queue(rt2x00dev->rx);
308 /* Do not race with with link tuner. */
309 mutex_lock(&rt2x00dev->conf_mutex);
312 * When we've just turned on the radio, we want to reprogram
313 * everything to ensure a consistent state
315 rt2x00lib_config(rt2x00dev, conf, changed);
318 * After the radio has been enabled we need to configure
319 * the antenna to the default settings. rt2x00lib_config_antenna()
320 * should determine if any action should be taken based on
321 * checking if diversity has been enabled or no antenna changes
322 * have been made since the last configuration change.
324 rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant);
326 mutex_unlock(&rt2x00dev->conf_mutex);
328 /* Turn RX back on */
329 rt2x00queue_start_queue(rt2x00dev->rx);
333 EXPORT_SYMBOL_GPL(rt2x00mac_config);
335 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
336 unsigned int changed_flags,
337 unsigned int *total_flags,
340 struct rt2x00_dev *rt2x00dev = hw->priv;
343 * Mask off any flags we are going to ignore
344 * from the total_flags field.
355 * Apply some rules to the filters:
356 * - Some filters imply different filters to be set.
357 * - Some things we can't filter out at all.
358 * - Multicast filter seems to kill broadcast traffic so never use it.
360 *total_flags |= FIF_ALLMULTI;
363 * If the device has a single filter for all control frames,
364 * FIF_CONTROL and FIF_PSPOLL flags imply each other.
365 * And if the device has more than one filter for control frames
366 * of different types, but has no a separate filter for PS Poll frames,
367 * FIF_CONTROL flag implies FIF_PSPOLL.
369 if (!rt2x00_has_cap_control_filters(rt2x00dev)) {
370 if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL)
371 *total_flags |= FIF_CONTROL | FIF_PSPOLL;
373 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) {
374 if (*total_flags & FIF_CONTROL)
375 *total_flags |= FIF_PSPOLL;
378 rt2x00dev->packet_filter = *total_flags;
380 rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags);
382 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter);
384 static void rt2x00mac_set_tim_iter(void *data, u8 *mac,
385 struct ieee80211_vif *vif)
387 struct rt2x00_intf *intf = vif_to_intf(vif);
389 if (vif->type != NL80211_IFTYPE_AP &&
390 vif->type != NL80211_IFTYPE_ADHOC &&
391 vif->type != NL80211_IFTYPE_MESH_POINT &&
392 vif->type != NL80211_IFTYPE_WDS)
395 set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags);
398 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
401 struct rt2x00_dev *rt2x00dev = hw->priv;
403 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
406 ieee80211_iterate_active_interfaces_atomic(
407 rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
408 rt2x00mac_set_tim_iter, rt2x00dev);
410 /* queue work to upodate the beacon template */
411 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work);
414 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim);
416 #ifdef CONFIG_RT2X00_LIB_CRYPTO
417 static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len)
419 if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY)
421 &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY],
422 sizeof(crypto->key));
424 if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY)
425 memcpy(crypto->tx_mic,
426 &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
427 sizeof(crypto->tx_mic));
429 if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY)
430 memcpy(crypto->rx_mic,
431 &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
432 sizeof(crypto->rx_mic));
435 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
436 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
437 struct ieee80211_key_conf *key)
439 struct rt2x00_dev *rt2x00dev = hw->priv;
440 int (*set_key) (struct rt2x00_dev *rt2x00dev,
441 struct rt2x00lib_crypto *crypto,
442 struct ieee80211_key_conf *key);
443 struct rt2x00lib_crypto crypto;
444 static const u8 bcast_addr[ETH_ALEN] =
445 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
446 struct rt2x00_sta *sta_priv = NULL;
448 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
451 if (!rt2x00_has_cap_hw_crypto(rt2x00dev))
455 * To support IBSS RSN, don't program group keys in IBSS, the
456 * hardware will then not attempt to decrypt the frames.
458 if (vif->type == NL80211_IFTYPE_ADHOC &&
459 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
462 if (key->keylen > 32)
465 memset(&crypto, 0, sizeof(crypto));
467 crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif);
468 crypto.cipher = rt2x00crypto_key_to_cipher(key);
469 if (crypto.cipher == CIPHER_NONE)
471 if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev))
477 crypto.address = sta->addr;
478 sta_priv = sta_to_rt2x00_sta(sta);
479 crypto.wcid = sta_priv->wcid;
481 crypto.address = bcast_addr;
483 if (crypto.cipher == CIPHER_TKIP)
484 memcpy_tkip(&crypto, &key->key[0], key->keylen);
486 memcpy(crypto.key, &key->key[0], key->keylen);
488 * Each BSS has a maximum of 4 shared keys.
489 * Shared key index values:
497 * Both pairwise as shared key indeces are determined by
498 * driver. This is required because the hardware requires
499 * keys to be assigned in correct order (When key 1 is
500 * provided but key 0 is not, then the key is not found
501 * by the hardware during RX).
506 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
507 set_key = rt2x00dev->ops->lib->config_pairwise_key;
509 set_key = rt2x00dev->ops->lib->config_shared_key;
514 return set_key(rt2x00dev, &crypto, key);
516 EXPORT_SYMBOL_GPL(rt2x00mac_set_key);
517 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
519 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
520 struct ieee80211_vif *vif,
523 struct rt2x00_dev *rt2x00dev = hw->priv;
524 set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
525 rt2x00link_stop_tuner(rt2x00dev);
527 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start);
529 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
530 struct ieee80211_vif *vif)
532 struct rt2x00_dev *rt2x00dev = hw->priv;
533 clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags);
534 rt2x00link_start_tuner(rt2x00dev);
536 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete);
538 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
539 struct ieee80211_low_level_stats *stats)
541 struct rt2x00_dev *rt2x00dev = hw->priv;
544 * The dot11ACKFailureCount, dot11RTSFailureCount and
545 * dot11RTSSuccessCount are updated in interrupt time.
546 * dot11FCSErrorCount is updated in the link tuner.
548 memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
552 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats);
554 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
555 struct ieee80211_vif *vif,
556 struct ieee80211_bss_conf *bss_conf,
559 struct rt2x00_dev *rt2x00dev = hw->priv;
560 struct rt2x00_intf *intf = vif_to_intf(vif);
563 * mac80211 might be calling this function while we are trying
564 * to remove the device or perhaps suspending it.
566 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
572 if (changes & BSS_CHANGED_BSSID)
573 rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL,
577 * Start/stop beaconing.
579 if (changes & BSS_CHANGED_BEACON_ENABLED) {
580 mutex_lock(&intf->beacon_skb_mutex);
581 if (!bss_conf->enable_beacon && intf->enable_beacon) {
582 rt2x00dev->intf_beaconing--;
583 intf->enable_beacon = false;
585 if (rt2x00dev->intf_beaconing == 0) {
587 * Last beaconing interface disabled
588 * -> stop beacon queue.
590 rt2x00queue_stop_queue(rt2x00dev->bcn);
593 * Clear beacon in the H/W for this vif. This is needed
594 * to disable beaconing on this particular interface
595 * and keep it running on other interfaces.
597 rt2x00queue_clear_beacon(rt2x00dev, vif);
598 } else if (bss_conf->enable_beacon && !intf->enable_beacon) {
599 rt2x00dev->intf_beaconing++;
600 intf->enable_beacon = true;
602 * Upload beacon to the H/W. This is only required on
603 * USB devices. PCI devices fetch beacons periodically.
605 if (rt2x00_is_usb(rt2x00dev))
606 rt2x00queue_update_beacon(rt2x00dev, vif);
608 if (rt2x00dev->intf_beaconing == 1) {
610 * First beaconing interface enabled
611 * -> start beacon queue.
613 rt2x00queue_start_queue(rt2x00dev->bcn);
616 mutex_unlock(&intf->beacon_skb_mutex);
620 * When the association status has changed we must reset the link
621 * tuner counter. This is because some drivers determine if they
622 * should perform link tuning based on the number of seconds
623 * while associated or not associated.
625 if (changes & BSS_CHANGED_ASSOC) {
626 rt2x00dev->link.count = 0;
629 rt2x00dev->intf_associated++;
631 rt2x00dev->intf_associated--;
633 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
637 * When the erp information has changed, we should perform
638 * additional configuration steps. For all other changes we are done.
640 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE |
641 BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES |
642 BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT))
643 rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes);
645 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed);
647 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
648 struct ieee80211_vif *vif, u16 queue_idx,
649 const struct ieee80211_tx_queue_params *params)
651 struct rt2x00_dev *rt2x00dev = hw->priv;
652 struct data_queue *queue;
654 queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx);
655 if (unlikely(!queue))
659 * The passed variables are stored as real value ((2^n)-1).
660 * Ralink registers require to know the bit number 'n'.
662 if (params->cw_min > 0)
663 queue->cw_min = fls(params->cw_min);
665 queue->cw_min = 5; /* cw_min: 2^5 = 32. */
667 if (params->cw_max > 0)
668 queue->cw_max = fls(params->cw_max);
670 queue->cw_max = 10; /* cw_min: 2^10 = 1024. */
672 queue->aifs = params->aifs;
673 queue->txop = params->txop;
675 rt2x00_dbg(rt2x00dev,
676 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n",
677 queue_idx, queue->cw_min, queue->cw_max, queue->aifs,
682 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx);
684 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw)
686 struct rt2x00_dev *rt2x00dev = hw->priv;
687 bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
689 wiphy_rfkill_set_hw_state(hw->wiphy, !active);
691 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll);
693 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
694 u32 queues, bool drop)
696 struct rt2x00_dev *rt2x00dev = hw->priv;
697 struct data_queue *queue;
699 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
702 set_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags);
704 tx_queue_for_each(rt2x00dev, queue)
705 rt2x00queue_flush_queue(queue, drop);
707 clear_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags);
709 EXPORT_SYMBOL_GPL(rt2x00mac_flush);
711 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
713 struct rt2x00_dev *rt2x00dev = hw->priv;
714 struct link_ant *ant = &rt2x00dev->link.ant;
715 struct antenna_setup *def = &rt2x00dev->default_ant;
716 struct antenna_setup setup;
718 // The antenna value is not supposed to be 0,
719 // or exceed the maximum number of antenna's.
720 if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3))
723 // When the client tried to configure the antenna to or from
724 // diversity mode, we must reset the default antenna as well
725 // as that controls the diversity switch.
726 if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3)
727 ant->flags &= ~ANTENNA_TX_DIVERSITY;
728 if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3)
729 ant->flags &= ~ANTENNA_RX_DIVERSITY;
731 // If diversity is being enabled, check if we need hardware
732 // or software diversity. In the latter case, reset the value,
733 // and make sure we update the antenna flags to have the
734 // link tuner pick up the diversity tuning.
735 if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) {
736 tx_ant = ANTENNA_SW_DIVERSITY;
737 ant->flags |= ANTENNA_TX_DIVERSITY;
740 if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) {
741 rx_ant = ANTENNA_SW_DIVERSITY;
742 ant->flags |= ANTENNA_RX_DIVERSITY;
747 setup.rx_chain_num = 0;
748 setup.tx_chain_num = 0;
750 rt2x00lib_config_antenna(rt2x00dev, setup);
754 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna);
756 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
758 struct rt2x00_dev *rt2x00dev = hw->priv;
759 struct link_ant *ant = &rt2x00dev->link.ant;
760 struct antenna_setup *active = &rt2x00dev->link.ant.active;
762 // When software diversity is active, we must report this to the
763 // client and not the current active antenna state.
764 if (ant->flags & ANTENNA_TX_DIVERSITY)
765 *tx_ant = ANTENNA_HW_DIVERSITY;
767 *tx_ant = active->tx;
769 if (ant->flags & ANTENNA_RX_DIVERSITY)
770 *rx_ant = ANTENNA_HW_DIVERSITY;
772 *rx_ant = active->rx;
776 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna);
778 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
779 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
781 struct rt2x00_dev *rt2x00dev = hw->priv;
782 struct data_queue *queue;
784 tx_queue_for_each(rt2x00dev, queue) {
785 *tx += queue->length;
786 *tx_max += queue->limit;
789 *rx = rt2x00dev->rx->length;
790 *rx_max = rt2x00dev->rx->limit;
792 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam);
794 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw)
796 struct rt2x00_dev *rt2x00dev = hw->priv;
797 struct data_queue *queue;
799 tx_queue_for_each(rt2x00dev, queue) {
800 if (!rt2x00queue_empty(queue))
806 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending);