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) {
147 * Recheck for full queue under lock to avoid race
148 * conditions with rt2x00lib_txdone().
150 spin_lock(&queue
->tx_lock
);
151 if (rt2x00queue_threshold(queue
))
152 rt2x00queue_pause_queue(queue
);
153 spin_unlock(&queue
->tx_lock
);
158 if (rt2x00mac_tx_rts_cts(rt2x00dev
, queue
, skb
))
162 if (unlikely(rt2x00queue_write_tx_frame(queue
, skb
, control
->sta
, false)))
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.
170 spin_lock(&queue
->tx_lock
);
171 if (rt2x00queue_threshold(queue
))
172 rt2x00queue_pause_queue(queue
);
173 spin_unlock(&queue
->tx_lock
);
178 ieee80211_free_txskb(hw
, skb
);
180 EXPORT_SYMBOL_GPL(rt2x00mac_tx
);
182 int rt2x00mac_start(struct ieee80211_hw
*hw
)
184 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
186 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
189 return rt2x00lib_start(rt2x00dev
);
191 EXPORT_SYMBOL_GPL(rt2x00mac_start
);
193 void rt2x00mac_stop(struct ieee80211_hw
*hw
)
195 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
197 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
200 rt2x00lib_stop(rt2x00dev
);
202 EXPORT_SYMBOL_GPL(rt2x00mac_stop
);
204 int rt2x00mac_add_interface(struct ieee80211_hw
*hw
,
205 struct ieee80211_vif
*vif
)
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
;
214 * Don't allow interfaces to be added
215 * the device has disappeared.
217 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) ||
218 !test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
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
227 for (i
= 0; i
< queue
->limit
; i
++) {
228 entry
= &queue
->entries
[i
];
229 if (!test_and_set_bit(ENTRY_BCN_ASSIGNED
, &entry
->flags
))
233 if (unlikely(i
== queue
->limit
))
237 * We are now absolutely sure the interface can be created,
238 * increase interface count and start initialization.
241 if (vif
->type
== NL80211_IFTYPE_AP
)
242 rt2x00dev
->intf_ap_count
++;
244 rt2x00dev
->intf_sta_count
++;
246 mutex_init(&intf
->beacon_skb_mutex
);
247 intf
->beacon
= entry
;
250 * The MAC address must be configured after the device
251 * has been initialized. Otherwise the device can reset
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.
258 rt2x00lib_config_intf(rt2x00dev
, intf
, vif
->type
,
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.
266 rt2x00dev
->packet_filter
= 0;
270 EXPORT_SYMBOL_GPL(rt2x00mac_add_interface
);
272 void rt2x00mac_remove_interface(struct ieee80211_hw
*hw
,
273 struct ieee80211_vif
*vif
)
275 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
276 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
279 * Don't allow interfaces to be remove while
280 * either the device has disappeared or when
281 * no interface is present.
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
))
288 if (vif
->type
== NL80211_IFTYPE_AP
)
289 rt2x00dev
->intf_ap_count
--;
291 rt2x00dev
->intf_sta_count
--;
294 * Release beacon entry so it is available for
295 * new interfaces again.
297 clear_bit(ENTRY_BCN_ASSIGNED
, &intf
->beacon
->flags
);
300 * Make sure the bssid and mac address registers
301 * are cleared to prevent false ACKing of frames.
303 rt2x00lib_config_intf(rt2x00dev
, intf
,
304 NL80211_IFTYPE_UNSPECIFIED
, NULL
, NULL
);
306 EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface
);
308 int rt2x00mac_config(struct ieee80211_hw
*hw
, u32 changed
)
310 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
311 struct ieee80211_conf
*conf
= &hw
->conf
;
314 * mac80211 might be calling this function while we are trying
315 * to remove the device or perhaps suspending it.
317 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
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().
327 rt2x00queue_stop_queue(rt2x00dev
->rx
);
329 /* Do not race with with link tuner. */
330 mutex_lock(&rt2x00dev
->conf_mutex
);
333 * When we've just turned on the radio, we want to reprogram
334 * everything to ensure a consistent state
336 rt2x00lib_config(rt2x00dev
, conf
, changed
);
339 * After the radio has been enabled we need to configure
340 * the antenna to the default settings. rt2x00lib_config_antenna()
341 * should determine if any action should be taken based on
342 * checking if diversity has been enabled or no antenna changes
343 * have been made since the last configuration change.
345 rt2x00lib_config_antenna(rt2x00dev
, rt2x00dev
->default_ant
);
347 mutex_unlock(&rt2x00dev
->conf_mutex
);
349 /* Turn RX back on */
350 rt2x00queue_start_queue(rt2x00dev
->rx
);
354 EXPORT_SYMBOL_GPL(rt2x00mac_config
);
356 void rt2x00mac_configure_filter(struct ieee80211_hw
*hw
,
357 unsigned int changed_flags
,
358 unsigned int *total_flags
,
361 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
364 * Mask off any flags we are going to ignore
365 * from the total_flags field.
376 * Apply some rules to the filters:
377 * - Some filters imply different filters to be set.
378 * - Some things we can't filter out at all.
379 * - Multicast filter seems to kill broadcast traffic so never use it.
381 *total_flags
|= FIF_ALLMULTI
;
384 * If the device has a single filter for all control frames,
385 * FIF_CONTROL and FIF_PSPOLL flags imply each other.
386 * And if the device has more than one filter for control frames
387 * of different types, but has no a separate filter for PS Poll frames,
388 * FIF_CONTROL flag implies FIF_PSPOLL.
390 if (!rt2x00_has_cap_control_filters(rt2x00dev
)) {
391 if (*total_flags
& FIF_CONTROL
|| *total_flags
& FIF_PSPOLL
)
392 *total_flags
|= FIF_CONTROL
| FIF_PSPOLL
;
394 if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev
)) {
395 if (*total_flags
& FIF_CONTROL
)
396 *total_flags
|= FIF_PSPOLL
;
399 rt2x00dev
->packet_filter
= *total_flags
;
401 rt2x00dev
->ops
->lib
->config_filter(rt2x00dev
, *total_flags
);
403 EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter
);
405 static void rt2x00mac_set_tim_iter(void *data
, u8
*mac
,
406 struct ieee80211_vif
*vif
)
408 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
410 if (vif
->type
!= NL80211_IFTYPE_AP
&&
411 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
412 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
413 vif
->type
!= NL80211_IFTYPE_WDS
)
416 set_bit(DELAYED_UPDATE_BEACON
, &intf
->delayed_flags
);
419 int rt2x00mac_set_tim(struct ieee80211_hw
*hw
, struct ieee80211_sta
*sta
,
422 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
424 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
427 ieee80211_iterate_active_interfaces_atomic(
428 rt2x00dev
->hw
, IEEE80211_IFACE_ITER_RESUME_ALL
,
429 rt2x00mac_set_tim_iter
, rt2x00dev
);
431 /* queue work to upodate the beacon template */
432 ieee80211_queue_work(rt2x00dev
->hw
, &rt2x00dev
->intf_work
);
435 EXPORT_SYMBOL_GPL(rt2x00mac_set_tim
);
437 #ifdef CONFIG_RT2X00_LIB_CRYPTO
438 static void memcpy_tkip(struct rt2x00lib_crypto
*crypto
, u8
*key
, u8 key_len
)
440 if (key_len
> NL80211_TKIP_DATA_OFFSET_ENCR_KEY
)
442 &key
[NL80211_TKIP_DATA_OFFSET_ENCR_KEY
],
443 sizeof(crypto
->key
));
445 if (key_len
> NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY
)
446 memcpy(crypto
->tx_mic
,
447 &key
[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY
],
448 sizeof(crypto
->tx_mic
));
450 if (key_len
> NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY
)
451 memcpy(crypto
->rx_mic
,
452 &key
[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY
],
453 sizeof(crypto
->rx_mic
));
456 int rt2x00mac_set_key(struct ieee80211_hw
*hw
, enum set_key_cmd cmd
,
457 struct ieee80211_vif
*vif
, struct ieee80211_sta
*sta
,
458 struct ieee80211_key_conf
*key
)
460 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
461 int (*set_key
) (struct rt2x00_dev
*rt2x00dev
,
462 struct rt2x00lib_crypto
*crypto
,
463 struct ieee80211_key_conf
*key
);
464 struct rt2x00lib_crypto crypto
;
465 static const u8 bcast_addr
[ETH_ALEN
] =
466 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, };
467 struct rt2x00_sta
*sta_priv
= NULL
;
469 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
472 if (!rt2x00_has_cap_hw_crypto(rt2x00dev
))
476 * To support IBSS RSN, don't program group keys in IBSS, the
477 * hardware will then not attempt to decrypt the frames.
479 if (vif
->type
== NL80211_IFTYPE_ADHOC
&&
480 !(key
->flags
& IEEE80211_KEY_FLAG_PAIRWISE
))
483 if (key
->keylen
> 32)
486 memset(&crypto
, 0, sizeof(crypto
));
488 crypto
.bssidx
= rt2x00lib_get_bssidx(rt2x00dev
, vif
);
489 crypto
.cipher
= rt2x00crypto_key_to_cipher(key
);
490 if (crypto
.cipher
== CIPHER_NONE
)
492 if (crypto
.cipher
== CIPHER_TKIP
&& rt2x00_is_usb(rt2x00dev
))
498 crypto
.address
= sta
->addr
;
499 sta_priv
= sta_to_rt2x00_sta(sta
);
500 crypto
.wcid
= sta_priv
->wcid
;
502 crypto
.address
= bcast_addr
;
504 if (crypto
.cipher
== CIPHER_TKIP
)
505 memcpy_tkip(&crypto
, &key
->key
[0], key
->keylen
);
507 memcpy(crypto
.key
, &key
->key
[0], key
->keylen
);
509 * Each BSS has a maximum of 4 shared keys.
510 * Shared key index values:
518 * Both pairwise as shared key indeces are determined by
519 * driver. This is required because the hardware requires
520 * keys to be assigned in correct order (When key 1 is
521 * provided but key 0 is not, then the key is not found
522 * by the hardware during RX).
527 if (key
->flags
& IEEE80211_KEY_FLAG_PAIRWISE
)
528 set_key
= rt2x00dev
->ops
->lib
->config_pairwise_key
;
530 set_key
= rt2x00dev
->ops
->lib
->config_shared_key
;
535 return set_key(rt2x00dev
, &crypto
, key
);
537 EXPORT_SYMBOL_GPL(rt2x00mac_set_key
);
538 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
540 int rt2x00mac_sta_add(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
541 struct ieee80211_sta
*sta
)
543 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
545 return rt2x00dev
->ops
->lib
->sta_add(rt2x00dev
, vif
, sta
);
547 EXPORT_SYMBOL_GPL(rt2x00mac_sta_add
);
549 int rt2x00mac_sta_remove(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
550 struct ieee80211_sta
*sta
)
552 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
554 return rt2x00dev
->ops
->lib
->sta_remove(rt2x00dev
, sta
);
556 EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove
);
558 void rt2x00mac_sw_scan_start(struct ieee80211_hw
*hw
,
559 struct ieee80211_vif
*vif
,
562 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
563 set_bit(DEVICE_STATE_SCANNING
, &rt2x00dev
->flags
);
564 rt2x00link_stop_tuner(rt2x00dev
);
566 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start
);
568 void rt2x00mac_sw_scan_complete(struct ieee80211_hw
*hw
,
569 struct ieee80211_vif
*vif
)
571 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
572 clear_bit(DEVICE_STATE_SCANNING
, &rt2x00dev
->flags
);
573 rt2x00link_start_tuner(rt2x00dev
);
575 EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete
);
577 int rt2x00mac_get_stats(struct ieee80211_hw
*hw
,
578 struct ieee80211_low_level_stats
*stats
)
580 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
583 * The dot11ACKFailureCount, dot11RTSFailureCount and
584 * dot11RTSSuccessCount are updated in interrupt time.
585 * dot11FCSErrorCount is updated in the link tuner.
587 memcpy(stats
, &rt2x00dev
->low_level_stats
, sizeof(*stats
));
591 EXPORT_SYMBOL_GPL(rt2x00mac_get_stats
);
593 void rt2x00mac_bss_info_changed(struct ieee80211_hw
*hw
,
594 struct ieee80211_vif
*vif
,
595 struct ieee80211_bss_conf
*bss_conf
,
598 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
599 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
602 * mac80211 might be calling this function while we are trying
603 * to remove the device or perhaps suspending it.
605 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
611 if (changes
& BSS_CHANGED_BSSID
)
612 rt2x00lib_config_intf(rt2x00dev
, intf
, vif
->type
, NULL
,
616 * Start/stop beaconing.
618 if (changes
& BSS_CHANGED_BEACON_ENABLED
) {
619 mutex_lock(&intf
->beacon_skb_mutex
);
620 if (!bss_conf
->enable_beacon
&& intf
->enable_beacon
) {
621 rt2x00dev
->intf_beaconing
--;
622 intf
->enable_beacon
= false;
624 if (rt2x00dev
->intf_beaconing
== 0) {
626 * Last beaconing interface disabled
627 * -> stop beacon queue.
629 rt2x00queue_stop_queue(rt2x00dev
->bcn
);
632 * Clear beacon in the H/W for this vif. This is needed
633 * to disable beaconing on this particular interface
634 * and keep it running on other interfaces.
636 rt2x00queue_clear_beacon(rt2x00dev
, vif
);
637 } else if (bss_conf
->enable_beacon
&& !intf
->enable_beacon
) {
638 rt2x00dev
->intf_beaconing
++;
639 intf
->enable_beacon
= true;
641 * Upload beacon to the H/W. This is only required on
642 * USB devices. PCI devices fetch beacons periodically.
644 if (rt2x00_is_usb(rt2x00dev
))
645 rt2x00queue_update_beacon(rt2x00dev
, vif
);
647 if (rt2x00dev
->intf_beaconing
== 1) {
649 * First beaconing interface enabled
650 * -> start beacon queue.
652 rt2x00queue_start_queue(rt2x00dev
->bcn
);
655 mutex_unlock(&intf
->beacon_skb_mutex
);
659 * When the association status has changed we must reset the link
660 * tuner counter. This is because some drivers determine if they
661 * should perform link tuning based on the number of seconds
662 * while associated or not associated.
664 if (changes
& BSS_CHANGED_ASSOC
) {
665 rt2x00dev
->link
.count
= 0;
668 rt2x00dev
->intf_associated
++;
670 rt2x00dev
->intf_associated
--;
672 rt2x00leds_led_assoc(rt2x00dev
, !!rt2x00dev
->intf_associated
);
674 clear_bit(CONFIG_QOS_DISABLED
, &rt2x00dev
->flags
);
678 * Check for access point which do not support 802.11e . We have to
679 * generate data frames sequence number in S/W for such AP, because
682 if (changes
& BSS_CHANGED_QOS
&& !bss_conf
->qos
)
683 set_bit(CONFIG_QOS_DISABLED
, &rt2x00dev
->flags
);
686 * When the erp information has changed, we should perform
687 * additional configuration steps. For all other changes we are done.
689 if (changes
& (BSS_CHANGED_ERP_CTS_PROT
| BSS_CHANGED_ERP_PREAMBLE
|
690 BSS_CHANGED_ERP_SLOT
| BSS_CHANGED_BASIC_RATES
|
691 BSS_CHANGED_BEACON_INT
| BSS_CHANGED_HT
))
692 rt2x00lib_config_erp(rt2x00dev
, intf
, bss_conf
, changes
);
694 EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed
);
696 int rt2x00mac_conf_tx(struct ieee80211_hw
*hw
,
697 struct ieee80211_vif
*vif
, u16 queue_idx
,
698 const struct ieee80211_tx_queue_params
*params
)
700 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
701 struct data_queue
*queue
;
703 queue
= rt2x00queue_get_tx_queue(rt2x00dev
, queue_idx
);
704 if (unlikely(!queue
))
708 * The passed variables are stored as real value ((2^n)-1).
709 * Ralink registers require to know the bit number 'n'.
711 if (params
->cw_min
> 0)
712 queue
->cw_min
= fls(params
->cw_min
);
714 queue
->cw_min
= 5; /* cw_min: 2^5 = 32. */
716 if (params
->cw_max
> 0)
717 queue
->cw_max
= fls(params
->cw_max
);
719 queue
->cw_max
= 10; /* cw_min: 2^10 = 1024. */
721 queue
->aifs
= params
->aifs
;
722 queue
->txop
= params
->txop
;
724 rt2x00_dbg(rt2x00dev
,
725 "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n",
726 queue_idx
, queue
->cw_min
, queue
->cw_max
, queue
->aifs
,
731 EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx
);
733 void rt2x00mac_rfkill_poll(struct ieee80211_hw
*hw
)
735 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
736 bool active
= !!rt2x00dev
->ops
->lib
->rfkill_poll(rt2x00dev
);
738 wiphy_rfkill_set_hw_state(hw
->wiphy
, !active
);
740 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll
);
742 void rt2x00mac_flush(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
743 u32 queues
, bool drop
)
745 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
746 struct data_queue
*queue
;
748 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
751 tx_queue_for_each(rt2x00dev
, queue
)
752 if (!rt2x00queue_empty(queue
))
753 rt2x00queue_flush_queue(queue
, drop
);
755 EXPORT_SYMBOL_GPL(rt2x00mac_flush
);
757 int rt2x00mac_set_antenna(struct ieee80211_hw
*hw
, u32 tx_ant
, u32 rx_ant
)
759 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
760 struct link_ant
*ant
= &rt2x00dev
->link
.ant
;
761 struct antenna_setup
*def
= &rt2x00dev
->default_ant
;
762 struct antenna_setup setup
;
764 // The antenna value is not supposed to be 0,
765 // or exceed the maximum number of antenna's.
766 if (!tx_ant
|| (tx_ant
& ~3) || !rx_ant
|| (rx_ant
& ~3))
769 // When the client tried to configure the antenna to or from
770 // diversity mode, we must reset the default antenna as well
771 // as that controls the diversity switch.
772 if (ant
->flags
& ANTENNA_TX_DIVERSITY
&& tx_ant
!= 3)
773 ant
->flags
&= ~ANTENNA_TX_DIVERSITY
;
774 if (ant
->flags
& ANTENNA_RX_DIVERSITY
&& rx_ant
!= 3)
775 ant
->flags
&= ~ANTENNA_RX_DIVERSITY
;
777 // If diversity is being enabled, check if we need hardware
778 // or software diversity. In the latter case, reset the value,
779 // and make sure we update the antenna flags to have the
780 // link tuner pick up the diversity tuning.
781 if (tx_ant
== 3 && def
->tx
== ANTENNA_SW_DIVERSITY
) {
782 tx_ant
= ANTENNA_SW_DIVERSITY
;
783 ant
->flags
|= ANTENNA_TX_DIVERSITY
;
786 if (rx_ant
== 3 && def
->rx
== ANTENNA_SW_DIVERSITY
) {
787 rx_ant
= ANTENNA_SW_DIVERSITY
;
788 ant
->flags
|= ANTENNA_RX_DIVERSITY
;
793 setup
.rx_chain_num
= 0;
794 setup
.tx_chain_num
= 0;
796 rt2x00lib_config_antenna(rt2x00dev
, setup
);
800 EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna
);
802 int rt2x00mac_get_antenna(struct ieee80211_hw
*hw
, u32
*tx_ant
, u32
*rx_ant
)
804 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
805 struct link_ant
*ant
= &rt2x00dev
->link
.ant
;
806 struct antenna_setup
*active
= &rt2x00dev
->link
.ant
.active
;
808 // When software diversity is active, we must report this to the
809 // client and not the current active antenna state.
810 if (ant
->flags
& ANTENNA_TX_DIVERSITY
)
811 *tx_ant
= ANTENNA_HW_DIVERSITY
;
813 *tx_ant
= active
->tx
;
815 if (ant
->flags
& ANTENNA_RX_DIVERSITY
)
816 *rx_ant
= ANTENNA_HW_DIVERSITY
;
818 *rx_ant
= active
->rx
;
822 EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna
);
824 void rt2x00mac_get_ringparam(struct ieee80211_hw
*hw
,
825 u32
*tx
, u32
*tx_max
, u32
*rx
, u32
*rx_max
)
827 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
828 struct data_queue
*queue
;
830 tx_queue_for_each(rt2x00dev
, queue
) {
831 *tx
+= queue
->length
;
832 *tx_max
+= queue
->limit
;
835 *rx
= rt2x00dev
->rx
->length
;
836 *rx_max
= rt2x00dev
->rx
->limit
;
838 EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam
);
840 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw
*hw
)
842 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
843 struct data_queue
*queue
;
845 tx_queue_for_each(rt2x00dev
, queue
) {
846 if (!rt2x00queue_empty(queue
))
852 EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending
);