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1/*-
2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004-2005 Atheros Communications, Inc.
4 * Copyright (c) 2006 Devicescape Software, Inc.
5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
7 * Copyright (c) 2010 Bruno Randolf <br1@einfach.org>
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
19 * redistribution must be conditioned upon including a substantially
20 * similar Disclaimer requirement for further binary redistribution.
21 * 3. Neither the names of the above-listed copyright holders nor the names
22 * of any contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * Alternatively, this software may be distributed under the terms of the
26 * GNU General Public License ("GPL") version 2 as published by the Free
27 * Software Foundation.
28 *
29 * NO WARRANTY
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
33 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
34 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
35 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
40 * THE POSSIBILITY OF SUCH DAMAGES.
41 *
42 */
43
44#include <asm/unaligned.h>
45
46#include "base.h"
47#include "reg.h"
48
49/********************\
50* Mac80211 functions *
51\********************/
52
53static void
54ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
55{
56 struct ath5k_hw *ah = hw->priv;
57 u16 qnum = skb_get_queue_mapping(skb);
58
59 if (WARN_ON(qnum >= ah->ah_capabilities.cap_queues.q_tx_num)) {
60 dev_kfree_skb_any(skb);
61 return;
62 }
63
64 ath5k_tx_queue(hw, skb, &ah->txqs[qnum]);
65}
66
67
68static int
69ath5k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
70{
71 struct ath5k_hw *ah = hw->priv;
72 int ret;
73 struct ath5k_vif *avf = (void *)vif->drv_priv;
74
75 mutex_lock(&ah->lock);
76
77 if ((vif->type == NL80211_IFTYPE_AP ||
78 vif->type == NL80211_IFTYPE_ADHOC)
79 && (ah->num_ap_vifs + ah->num_adhoc_vifs) >= ATH_BCBUF) {
80 ret = -ELNRNG;
81 goto end;
82 }
83
84 /* Don't allow other interfaces if one ad-hoc is configured.
85 * TODO: Fix the problems with ad-hoc and multiple other interfaces.
86 * We would need to operate the HW in ad-hoc mode to allow TSF updates
87 * for the IBSS, but this breaks with additional AP or STA interfaces
88 * at the moment. */
89 if (ah->num_adhoc_vifs ||
90 (ah->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) {
91 ATH5K_ERR(ah, "Only one single ad-hoc interface is allowed.\n");
92 ret = -ELNRNG;
93 goto end;
94 }
95
96 switch (vif->type) {
97 case NL80211_IFTYPE_AP:
98 case NL80211_IFTYPE_STATION:
99 case NL80211_IFTYPE_ADHOC:
100 case NL80211_IFTYPE_MESH_POINT:
101 avf->opmode = vif->type;
102 break;
103 default:
104 ret = -EOPNOTSUPP;
105 goto end;
106 }
107
108 ah->nvifs++;
109 ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode);
110
111 /* Assign the vap/adhoc to a beacon xmit slot. */
112 if ((avf->opmode == NL80211_IFTYPE_AP) ||
113 (avf->opmode == NL80211_IFTYPE_ADHOC) ||
114 (avf->opmode == NL80211_IFTYPE_MESH_POINT)) {
115 int slot;
116
117 WARN_ON(list_empty(&ah->bcbuf));
118 avf->bbuf = list_first_entry(&ah->bcbuf, struct ath5k_buf,
119 list);
120 list_del(&avf->bbuf->list);
121
122 avf->bslot = 0;
123 for (slot = 0; slot < ATH_BCBUF; slot++) {
124 if (!ah->bslot[slot]) {
125 avf->bslot = slot;
126 break;
127 }
128 }
129 BUG_ON(ah->bslot[avf->bslot] != NULL);
130 ah->bslot[avf->bslot] = vif;
131 if (avf->opmode == NL80211_IFTYPE_AP)
132 ah->num_ap_vifs++;
133 else if (avf->opmode == NL80211_IFTYPE_ADHOC)
134 ah->num_adhoc_vifs++;
135 }
136
137 /* Any MAC address is fine, all others are included through the
138 * filter.
139 */
140 memcpy(&ah->lladdr, vif->addr, ETH_ALEN);
141 ath5k_hw_set_lladdr(ah, vif->addr);
142
143 memcpy(&avf->lladdr, vif->addr, ETH_ALEN);
144
145 ath5k_update_bssid_mask_and_opmode(ah, vif);
146 ret = 0;
147end:
148 mutex_unlock(&ah->lock);
149 return ret;
150}
151
152
153static void
154ath5k_remove_interface(struct ieee80211_hw *hw,
155 struct ieee80211_vif *vif)
156{
157 struct ath5k_hw *ah = hw->priv;
158 struct ath5k_vif *avf = (void *)vif->drv_priv;
159 unsigned int i;
160
161 mutex_lock(&ah->lock);
162 ah->nvifs--;
163
164 if (avf->bbuf) {
165 ath5k_txbuf_free_skb(ah, avf->bbuf);
166 list_add_tail(&avf->bbuf->list, &ah->bcbuf);
167 for (i = 0; i < ATH_BCBUF; i++) {
168 if (ah->bslot[i] == vif) {
169 ah->bslot[i] = NULL;
170 break;
171 }
172 }
173 avf->bbuf = NULL;
174 }
175 if (avf->opmode == NL80211_IFTYPE_AP)
176 ah->num_ap_vifs--;
177 else if (avf->opmode == NL80211_IFTYPE_ADHOC)
178 ah->num_adhoc_vifs--;
179
180 ath5k_update_bssid_mask_and_opmode(ah, NULL);
181 mutex_unlock(&ah->lock);
182}
183
184
185/*
186 * TODO: Phy disable/diversity etc
187 */
188static int
189ath5k_config(struct ieee80211_hw *hw, u32 changed)
190{
191 struct ath5k_hw *ah = hw->priv;
192 struct ieee80211_conf *conf = &hw->conf;
193 int ret = 0;
194 int i;
195
196 mutex_lock(&ah->lock);
197
198 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
199 ret = ath5k_chan_set(ah, conf->channel);
200 if (ret < 0)
201 goto unlock;
202 }
203
204 if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
205 (ah->power_level != conf->power_level)) {
206 ah->power_level = conf->power_level;
207
208 /* Half dB steps */
209 ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2));
210 }
211
212 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
213 ah->ah_retry_long = conf->long_frame_max_tx_count;
214 ah->ah_retry_short = conf->short_frame_max_tx_count;
215
216 for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++)
217 ath5k_hw_set_tx_retry_limits(ah, i);
218 }
219
220 /* TODO:
221 * 1) Move this on config_interface and handle each case
222 * separately eg. when we have only one STA vif, use
223 * AR5K_ANTMODE_SINGLE_AP
224 *
225 * 2) Allow the user to change antenna mode eg. when only
226 * one antenna is present
227 *
228 * 3) Allow the user to set default/tx antenna when possible
229 *
230 * 4) Default mode should handle 90% of the cases, together
231 * with fixed a/b and single AP modes we should be able to
232 * handle 99%. Sectored modes are extreme cases and i still
233 * haven't found a usage for them. If we decide to support them,
234 * then we must allow the user to set how many tx antennas we
235 * have available
236 */
237 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);
238
239unlock:
240 mutex_unlock(&ah->lock);
241 return ret;
242}
243
244
245static void
246ath5k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
247 struct ieee80211_bss_conf *bss_conf, u32 changes)
248{
249 struct ath5k_vif *avf = (void *)vif->drv_priv;
250 struct ath5k_hw *ah = hw->priv;
251 struct ath_common *common = ath5k_hw_common(ah);
252 unsigned long flags;
253
254 mutex_lock(&ah->lock);
255
256 if (changes & BSS_CHANGED_BSSID) {
257 /* Cache for later use during resets */
258 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
259 common->curaid = 0;
260 ath5k_hw_set_bssid(ah);
261 mmiowb();
262 }
263
264 if (changes & BSS_CHANGED_BEACON_INT)
265 ah->bintval = bss_conf->beacon_int;
266
267 if (changes & BSS_CHANGED_ERP_SLOT) {
268 int slot_time;
269
270 ah->ah_short_slot = bss_conf->use_short_slot;
271 slot_time = ath5k_hw_get_default_slottime(ah) +
272 3 * ah->ah_coverage_class;
273 ath5k_hw_set_ifs_intervals(ah, slot_time);
274 }
275
276 if (changes & BSS_CHANGED_ASSOC) {
277 avf->assoc = bss_conf->assoc;
278 if (bss_conf->assoc)
279 ah->assoc = bss_conf->assoc;
280 else
281 ah->assoc = ath5k_any_vif_assoc(ah);
282
283 if (ah->opmode == NL80211_IFTYPE_STATION)
284 ath5k_set_beacon_filter(hw, ah->assoc);
285 ath5k_hw_set_ledstate(ah, ah->assoc ?
286 AR5K_LED_ASSOC : AR5K_LED_INIT);
287 if (bss_conf->assoc) {
288 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
289 "Bss Info ASSOC %d, bssid: %pM\n",
290 bss_conf->aid, common->curbssid);
291 common->curaid = bss_conf->aid;
292 ath5k_hw_set_bssid(ah);
293 /* Once ANI is available you would start it here */
294 }
295 }
296
297 if (changes & BSS_CHANGED_BEACON) {
298 spin_lock_irqsave(&ah->block, flags);
299 ath5k_beacon_update(hw, vif);
300 spin_unlock_irqrestore(&ah->block, flags);
301 }
302
303 if (changes & BSS_CHANGED_BEACON_ENABLED)
304 ah->enable_beacon = bss_conf->enable_beacon;
305
306 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
307 BSS_CHANGED_BEACON_INT))
308 ath5k_beacon_config(ah);
309
310 mutex_unlock(&ah->lock);
311}
312
313
314static u64
315ath5k_prepare_multicast(struct ieee80211_hw *hw,
316 struct netdev_hw_addr_list *mc_list)
317{
318 u32 mfilt[2], val;
319 u8 pos;
320 struct netdev_hw_addr *ha;
321
322 mfilt[0] = 0;
323 mfilt[1] = 1;
324
325 netdev_hw_addr_list_for_each(ha, mc_list) {
326 /* calculate XOR of eight 6-bit values */
327 val = get_unaligned_le32(ha->addr + 0);
328 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
329 val = get_unaligned_le32(ha->addr + 3);
330 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
331 pos &= 0x3f;
332 mfilt[pos / 32] |= (1 << (pos % 32));
333 /* XXX: we might be able to just do this instead,
334 * but not sure, needs testing, if we do use this we'd
335 * need to inform below not to reset the mcast */
336 /* ath5k_hw_set_mcast_filterindex(ah,
337 * ha->addr[5]); */
338 }
339
340 return ((u64)(mfilt[1]) << 32) | mfilt[0];
341}
342
343
344/*
345 * o always accept unicast, broadcast, and multicast traffic
346 * o multicast traffic for all BSSIDs will be enabled if mac80211
347 * says it should be
348 * o maintain current state of phy ofdm or phy cck error reception.
349 * If the hardware detects any of these type of errors then
350 * ath5k_hw_get_rx_filter() will pass to us the respective
351 * hardware filters to be able to receive these type of frames.
352 * o probe request frames are accepted only when operating in
353 * hostap, adhoc, or monitor modes
354 * o enable promiscuous mode according to the interface state
355 * o accept beacons:
356 * - when operating in adhoc mode so the 802.11 layer creates
357 * node table entries for peers,
358 * - when operating in station mode for collecting rssi data when
359 * the station is otherwise quiet, or
360 * - when scanning
361 */
362static void
363ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
364 unsigned int *new_flags, u64 multicast)
365{
366#define SUPPORTED_FIF_FLAGS \
367 (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
368 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
369 FIF_BCN_PRBRESP_PROMISC)
370
371 struct ath5k_hw *ah = hw->priv;
372 u32 mfilt[2], rfilt;
373 struct ath5k_vif_iter_data iter_data; /* to count STA interfaces */
374
375 mutex_lock(&ah->lock);
376
377 mfilt[0] = multicast;
378 mfilt[1] = multicast >> 32;
379
380 /* Only deal with supported flags */
381 changed_flags &= SUPPORTED_FIF_FLAGS;
382 *new_flags &= SUPPORTED_FIF_FLAGS;
383
384 /* If HW detects any phy or radar errors, leave those filters on.
385 * Also, always enable Unicast, Broadcasts and Multicast
386 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
387 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
388 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
389 AR5K_RX_FILTER_MCAST);
390
391 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
392 if (*new_flags & FIF_PROMISC_IN_BSS)
393 __set_bit(ATH_STAT_PROMISC, ah->status);
394 else
395 __clear_bit(ATH_STAT_PROMISC, ah->status);
396 }
397
398 if (test_bit(ATH_STAT_PROMISC, ah->status))
399 rfilt |= AR5K_RX_FILTER_PROM;
400
401 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
402 if (*new_flags & FIF_ALLMULTI) {
403 mfilt[0] = ~0;
404 mfilt[1] = ~0;
405 }
406
407 /* This is the best we can do */
408 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
409 rfilt |= AR5K_RX_FILTER_PHYERR;
410
411 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
412 * and probes for any BSSID */
413 if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (ah->nvifs > 1))
414 rfilt |= AR5K_RX_FILTER_BEACON;
415
416 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
417 * set we should only pass on control frames for this
418 * station. This needs testing. I believe right now this
419 * enables *all* control frames, which is OK.. but
420 * but we should see if we can improve on granularity */
421 if (*new_flags & FIF_CONTROL)
422 rfilt |= AR5K_RX_FILTER_CONTROL;
423
424 /* Additional settings per mode -- this is per ath5k */
425
426 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
427
428 switch (ah->opmode) {
429 case NL80211_IFTYPE_MESH_POINT:
430 rfilt |= AR5K_RX_FILTER_CONTROL |
431 AR5K_RX_FILTER_BEACON |
432 AR5K_RX_FILTER_PROBEREQ |
433 AR5K_RX_FILTER_PROM;
434 break;
435 case NL80211_IFTYPE_AP:
436 case NL80211_IFTYPE_ADHOC:
437 rfilt |= AR5K_RX_FILTER_PROBEREQ |
438 AR5K_RX_FILTER_BEACON;
439 break;
440 case NL80211_IFTYPE_STATION:
441 if (ah->assoc)
442 rfilt |= AR5K_RX_FILTER_BEACON;
443 default:
444 break;
445 }
446
447 iter_data.hw_macaddr = NULL;
448 iter_data.n_stas = 0;
449 iter_data.need_set_hw_addr = false;
450 ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter,
451 &iter_data);
452
453 /* Set up RX Filter */
454 if (iter_data.n_stas > 1) {
455 /* If you have multiple STA interfaces connected to
456 * different APs, ARPs are not received (most of the time?)
457 * Enabling PROMISC appears to fix that problem.
458 */
459 rfilt |= AR5K_RX_FILTER_PROM;
460 }
461
462 /* Set filters */
463 ath5k_hw_set_rx_filter(ah, rfilt);
464
465 /* Set multicast bits */
466 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
467 /* Set the cached hw filter flags, this will later actually
468 * be set in HW */
469 ah->filter_flags = rfilt;
470
471 mutex_unlock(&ah->lock);
472}
473
474
475static int
476ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
477 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
478 struct ieee80211_key_conf *key)
479{
480 struct ath5k_hw *ah = hw->priv;
481 struct ath_common *common = ath5k_hw_common(ah);
482 int ret = 0;
483
484 if (ath5k_modparam_nohwcrypt)
485 return -EOPNOTSUPP;
486
487 switch (key->cipher) {
488 case WLAN_CIPHER_SUITE_WEP40:
489 case WLAN_CIPHER_SUITE_WEP104:
490 case WLAN_CIPHER_SUITE_TKIP:
491 break;
492 case WLAN_CIPHER_SUITE_CCMP:
493 if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
494 break;
495 return -EOPNOTSUPP;
496 default:
497 WARN_ON(1);
498 return -EINVAL;
499 }
500
501 mutex_lock(&ah->lock);
502
503 switch (cmd) {
504 case SET_KEY:
505 ret = ath_key_config(common, vif, sta, key);
506 if (ret >= 0) {
507 key->hw_key_idx = ret;
508 /* push IV and Michael MIC generation to stack */
509 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
510 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
511 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
512 if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
513 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
514 ret = 0;
515 }
516 break;
517 case DISABLE_KEY:
518 ath_key_delete(common, key);
519 break;
520 default:
521 ret = -EINVAL;
522 }
523
524 mmiowb();
525 mutex_unlock(&ah->lock);
526 return ret;
527}
528
529
530static void
531ath5k_sw_scan_start(struct ieee80211_hw *hw)
532{
533 struct ath5k_hw *ah = hw->priv;
534 if (!ah->assoc)
535 ath5k_hw_set_ledstate(ah, AR5K_LED_SCAN);
536}
537
538
539static void
540ath5k_sw_scan_complete(struct ieee80211_hw *hw)
541{
542 struct ath5k_hw *ah = hw->priv;
543 ath5k_hw_set_ledstate(ah, ah->assoc ?
544 AR5K_LED_ASSOC : AR5K_LED_INIT);
545}
546
547
548static int
549ath5k_get_stats(struct ieee80211_hw *hw,
550 struct ieee80211_low_level_stats *stats)
551{
552 struct ath5k_hw *ah = hw->priv;
553
554 /* Force update */
555 ath5k_hw_update_mib_counters(ah);
556
557 stats->dot11ACKFailureCount = ah->stats.ack_fail;
558 stats->dot11RTSFailureCount = ah->stats.rts_fail;
559 stats->dot11RTSSuccessCount = ah->stats.rts_ok;
560 stats->dot11FCSErrorCount = ah->stats.fcs_error;
561
562 return 0;
563}
564
565
566static int
567ath5k_conf_tx(struct ieee80211_hw *hw, u16 queue,
568 const struct ieee80211_tx_queue_params *params)
569{
570 struct ath5k_hw *ah = hw->priv;
571 struct ath5k_txq_info qi;
572 int ret = 0;
573
574 if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
575 return 0;
576
577 mutex_lock(&ah->lock);
578
579 ath5k_hw_get_tx_queueprops(ah, queue, &qi);
580
581 qi.tqi_aifs = params->aifs;
582 qi.tqi_cw_min = params->cw_min;
583 qi.tqi_cw_max = params->cw_max;
584 qi.tqi_burst_time = params->txop;
585
586 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
587 "Configure tx [queue %d], "
588 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
589 queue, params->aifs, params->cw_min,
590 params->cw_max, params->txop);
591
592 if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
593 ATH5K_ERR(ah,
594 "Unable to update hardware queue %u!\n", queue);
595 ret = -EIO;
596 } else
597 ath5k_hw_reset_tx_queue(ah, queue);
598
599 mutex_unlock(&ah->lock);
600
601 return ret;
602}
603
604
605static u64
606ath5k_get_tsf(struct ieee80211_hw *hw)
607{
608 struct ath5k_hw *ah = hw->priv;
609
610 return ath5k_hw_get_tsf64(ah);
611}
612
613
614static void
615ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
616{
617 struct ath5k_hw *ah = hw->priv;
618
619 ath5k_hw_set_tsf64(ah, tsf);
620}
621
622
623static void
624ath5k_reset_tsf(struct ieee80211_hw *hw)
625{
626 struct ath5k_hw *ah = hw->priv;
627
628 /*
629 * in IBSS mode we need to update the beacon timers too.
630 * this will also reset the TSF if we call it with 0
631 */
632 if (ah->opmode == NL80211_IFTYPE_ADHOC)
633 ath5k_beacon_update_timers(ah, 0);
634 else
635 ath5k_hw_reset_tsf(ah);
636}
637
638
639static int
640ath5k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey)
641{
642 struct ath5k_hw *ah = hw->priv;
643 struct ieee80211_conf *conf = &hw->conf;
644 struct ath_common *common = ath5k_hw_common(ah);
645 struct ath_cycle_counters *cc = &common->cc_survey;
646 unsigned int div = common->clockrate * 1000;
647
648 if (idx != 0)
649 return -ENOENT;
650
651 spin_lock_bh(&common->cc_lock);
652 ath_hw_cycle_counters_update(common);
653 if (cc->cycles > 0) {
654 ah->survey.channel_time += cc->cycles / div;
655 ah->survey.channel_time_busy += cc->rx_busy / div;
656 ah->survey.channel_time_rx += cc->rx_frame / div;
657 ah->survey.channel_time_tx += cc->tx_frame / div;
658 }
659 memset(cc, 0, sizeof(*cc));
660 spin_unlock_bh(&common->cc_lock);
661
662 memcpy(survey, &ah->survey, sizeof(*survey));
663
664 survey->channel = conf->channel;
665 survey->noise = ah->ah_noise_floor;
666 survey->filled = SURVEY_INFO_NOISE_DBM |
667 SURVEY_INFO_CHANNEL_TIME |
668 SURVEY_INFO_CHANNEL_TIME_BUSY |
669 SURVEY_INFO_CHANNEL_TIME_RX |
670 SURVEY_INFO_CHANNEL_TIME_TX;
671
672 return 0;
673}
674
675
676/**
677 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
678 *
679 * @hw: struct ieee80211_hw pointer
680 * @coverage_class: IEEE 802.11 coverage class number
681 *
682 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
683 * coverage class. The values are persistent, they are restored after device
684 * reset.
685 */
686static void
687ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
688{
689 struct ath5k_hw *ah = hw->priv;
690
691 mutex_lock(&ah->lock);
692 ath5k_hw_set_coverage_class(ah, coverage_class);
693 mutex_unlock(&ah->lock);
694}
695
696
697static int
698ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
699{
700 struct ath5k_hw *ah = hw->priv;
701
702 if (tx_ant == 1 && rx_ant == 1)
703 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_A);
704 else if (tx_ant == 2 && rx_ant == 2)
705 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_B);
706 else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3)
707 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT);
708 else
709 return -EINVAL;
710 return 0;
711}
712
713
714static int
715ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
716{
717 struct ath5k_hw *ah = hw->priv;
718
719 switch (ah->ah_ant_mode) {
720 case AR5K_ANTMODE_FIXED_A:
721 *tx_ant = 1; *rx_ant = 1; break;
722 case AR5K_ANTMODE_FIXED_B:
723 *tx_ant = 2; *rx_ant = 2; break;
724 case AR5K_ANTMODE_DEFAULT:
725 *tx_ant = 3; *rx_ant = 3; break;
726 }
727 return 0;
728}
729
730
731static void ath5k_get_ringparam(struct ieee80211_hw *hw,
732 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
733{
734 struct ath5k_hw *ah = hw->priv;
735
736 *tx = ah->txqs[AR5K_TX_QUEUE_ID_DATA_MIN].txq_max;
737
738 *tx_max = ATH5K_TXQ_LEN_MAX;
739 *rx = *rx_max = ATH_RXBUF;
740}
741
742
743static int ath5k_set_ringparam(struct ieee80211_hw *hw, u32 tx, u32 rx)
744{
745 struct ath5k_hw *ah = hw->priv;
746 u16 qnum;
747
748 /* only support setting tx ring size for now */
749 if (rx != ATH_RXBUF)
750 return -EINVAL;
751
752 /* restrict tx ring size min/max */
753 if (!tx || tx > ATH5K_TXQ_LEN_MAX)
754 return -EINVAL;
755
756 for (qnum = 0; qnum < ARRAY_SIZE(ah->txqs); qnum++) {
757 if (!ah->txqs[qnum].setup)
758 continue;
759 if (ah->txqs[qnum].qnum < AR5K_TX_QUEUE_ID_DATA_MIN ||
760 ah->txqs[qnum].qnum > AR5K_TX_QUEUE_ID_DATA_MAX)
761 continue;
762
763 ah->txqs[qnum].txq_max = tx;
764 if (ah->txqs[qnum].txq_len >= ah->txqs[qnum].txq_max)
765 ieee80211_stop_queue(hw, ah->txqs[qnum].qnum);
766 }
767
768 return 0;
769}
770
771
772const struct ieee80211_ops ath5k_hw_ops = {
773 .tx = ath5k_tx,
774 .start = ath5k_start,
775 .stop = ath5k_stop,
776 .add_interface = ath5k_add_interface,
777 /* .change_interface = not implemented */
778 .remove_interface = ath5k_remove_interface,
779 .config = ath5k_config,
780 .bss_info_changed = ath5k_bss_info_changed,
781 .prepare_multicast = ath5k_prepare_multicast,
782 .configure_filter = ath5k_configure_filter,
783 /* .set_tim = not implemented */
784 .set_key = ath5k_set_key,
785 /* .update_tkip_key = not implemented */
786 /* .hw_scan = not implemented */
787 .sw_scan_start = ath5k_sw_scan_start,
788 .sw_scan_complete = ath5k_sw_scan_complete,
789 .get_stats = ath5k_get_stats,
790 /* .get_tkip_seq = not implemented */
791 /* .set_frag_threshold = not implemented */
792 /* .set_rts_threshold = not implemented */
793 /* .sta_add = not implemented */
794 /* .sta_remove = not implemented */
795 /* .sta_notify = not implemented */
796 .conf_tx = ath5k_conf_tx,
797 .get_tsf = ath5k_get_tsf,
798 .set_tsf = ath5k_set_tsf,
799 .reset_tsf = ath5k_reset_tsf,
800 /* .tx_last_beacon = not implemented */
801 /* .ampdu_action = not needed */
802 .get_survey = ath5k_get_survey,
803 .set_coverage_class = ath5k_set_coverage_class,
804 /* .rfkill_poll = not implemented */
805 /* .flush = not implemented */
806 /* .channel_switch = not implemented */
807 /* .napi_poll = not implemented */
808 .set_antenna = ath5k_set_antenna,
809 .get_antenna = ath5k_get_antenna,
810 .set_ringparam = ath5k_set_ringparam,
811 .get_ringparam = ath5k_get_ringparam,
812};
1/*-
2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004-2005 Atheros Communications, Inc.
4 * Copyright (c) 2006 Devicescape Software, Inc.
5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
7 * Copyright (c) 2010 Bruno Randolf <br1@einfach.org>
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
19 * redistribution must be conditioned upon including a substantially
20 * similar Disclaimer requirement for further binary redistribution.
21 * 3. Neither the names of the above-listed copyright holders nor the names
22 * of any contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * Alternatively, this software may be distributed under the terms of the
26 * GNU General Public License ("GPL") version 2 as published by the Free
27 * Software Foundation.
28 *
29 * NO WARRANTY
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
33 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
34 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
35 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
40 * THE POSSIBILITY OF SUCH DAMAGES.
41 *
42 */
43
44#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
45
46#include <net/mac80211.h>
47#include <asm/unaligned.h>
48
49#include "ath5k.h"
50#include "base.h"
51#include "reg.h"
52
53/********************\
54* Mac80211 functions *
55\********************/
56
57static void
58ath5k_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
59 struct sk_buff *skb)
60{
61 struct ath5k_hw *ah = hw->priv;
62 u16 qnum = skb_get_queue_mapping(skb);
63
64 if (WARN_ON(qnum >= ah->ah_capabilities.cap_queues.q_tx_num)) {
65 ieee80211_free_txskb(hw, skb);
66 return;
67 }
68
69 ath5k_tx_queue(hw, skb, &ah->txqs[qnum], control);
70}
71
72
73static int
74ath5k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
75{
76 struct ath5k_hw *ah = hw->priv;
77 int ret;
78 struct ath5k_vif *avf = (void *)vif->drv_priv;
79
80 mutex_lock(&ah->lock);
81
82 if ((vif->type == NL80211_IFTYPE_AP ||
83 vif->type == NL80211_IFTYPE_ADHOC)
84 && (ah->num_ap_vifs + ah->num_adhoc_vifs) >= ATH_BCBUF) {
85 ret = -ELNRNG;
86 goto end;
87 }
88
89 /* Don't allow other interfaces if one ad-hoc is configured.
90 * TODO: Fix the problems with ad-hoc and multiple other interfaces.
91 * We would need to operate the HW in ad-hoc mode to allow TSF updates
92 * for the IBSS, but this breaks with additional AP or STA interfaces
93 * at the moment. */
94 if (ah->num_adhoc_vifs ||
95 (ah->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) {
96 ATH5K_ERR(ah, "Only one single ad-hoc interface is allowed.\n");
97 ret = -ELNRNG;
98 goto end;
99 }
100
101 switch (vif->type) {
102 case NL80211_IFTYPE_AP:
103 case NL80211_IFTYPE_STATION:
104 case NL80211_IFTYPE_ADHOC:
105 case NL80211_IFTYPE_MESH_POINT:
106 avf->opmode = vif->type;
107 break;
108 default:
109 ret = -EOPNOTSUPP;
110 goto end;
111 }
112
113 ah->nvifs++;
114 ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode);
115
116 /* Assign the vap/adhoc to a beacon xmit slot. */
117 if ((avf->opmode == NL80211_IFTYPE_AP) ||
118 (avf->opmode == NL80211_IFTYPE_ADHOC) ||
119 (avf->opmode == NL80211_IFTYPE_MESH_POINT)) {
120 int slot;
121
122 WARN_ON(list_empty(&ah->bcbuf));
123 avf->bbuf = list_first_entry(&ah->bcbuf, struct ath5k_buf,
124 list);
125 list_del(&avf->bbuf->list);
126
127 avf->bslot = 0;
128 for (slot = 0; slot < ATH_BCBUF; slot++) {
129 if (!ah->bslot[slot]) {
130 avf->bslot = slot;
131 break;
132 }
133 }
134 BUG_ON(ah->bslot[avf->bslot] != NULL);
135 ah->bslot[avf->bslot] = vif;
136 if (avf->opmode == NL80211_IFTYPE_AP)
137 ah->num_ap_vifs++;
138 else if (avf->opmode == NL80211_IFTYPE_ADHOC)
139 ah->num_adhoc_vifs++;
140 else if (avf->opmode == NL80211_IFTYPE_MESH_POINT)
141 ah->num_mesh_vifs++;
142 }
143
144 /* Any MAC address is fine, all others are included through the
145 * filter.
146 */
147 ath5k_hw_set_lladdr(ah, vif->addr);
148
149 ath5k_update_bssid_mask_and_opmode(ah, vif);
150 ret = 0;
151end:
152 mutex_unlock(&ah->lock);
153 return ret;
154}
155
156
157static void
158ath5k_remove_interface(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif)
160{
161 struct ath5k_hw *ah = hw->priv;
162 struct ath5k_vif *avf = (void *)vif->drv_priv;
163 unsigned int i;
164
165 mutex_lock(&ah->lock);
166 ah->nvifs--;
167
168 if (avf->bbuf) {
169 ath5k_txbuf_free_skb(ah, avf->bbuf);
170 list_add_tail(&avf->bbuf->list, &ah->bcbuf);
171 for (i = 0; i < ATH_BCBUF; i++) {
172 if (ah->bslot[i] == vif) {
173 ah->bslot[i] = NULL;
174 break;
175 }
176 }
177 avf->bbuf = NULL;
178 }
179 if (avf->opmode == NL80211_IFTYPE_AP)
180 ah->num_ap_vifs--;
181 else if (avf->opmode == NL80211_IFTYPE_ADHOC)
182 ah->num_adhoc_vifs--;
183 else if (avf->opmode == NL80211_IFTYPE_MESH_POINT)
184 ah->num_mesh_vifs--;
185
186 ath5k_update_bssid_mask_and_opmode(ah, NULL);
187 mutex_unlock(&ah->lock);
188}
189
190
191/*
192 * TODO: Phy disable/diversity etc
193 */
194static int
195ath5k_config(struct ieee80211_hw *hw, u32 changed)
196{
197 struct ath5k_hw *ah = hw->priv;
198 struct ieee80211_conf *conf = &hw->conf;
199 int ret = 0;
200 int i;
201
202 mutex_lock(&ah->lock);
203
204 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
205 ret = ath5k_chan_set(ah, &conf->chandef);
206 if (ret < 0)
207 goto unlock;
208 }
209
210 if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
211 (ah->ah_txpower.txp_requested != conf->power_level)) {
212 ah->ah_txpower.txp_requested = conf->power_level;
213
214 /* Half dB steps */
215 ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2));
216 }
217
218 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
219 ah->ah_retry_long = conf->long_frame_max_tx_count;
220 ah->ah_retry_short = conf->short_frame_max_tx_count;
221
222 for (i = 0; i < ah->ah_capabilities.cap_queues.q_tx_num; i++)
223 ath5k_hw_set_tx_retry_limits(ah, i);
224 }
225
226 /* TODO:
227 * 1) Move this on config_interface and handle each case
228 * separately eg. when we have only one STA vif, use
229 * AR5K_ANTMODE_SINGLE_AP
230 *
231 * 2) Allow the user to change antenna mode eg. when only
232 * one antenna is present
233 *
234 * 3) Allow the user to set default/tx antenna when possible
235 *
236 * 4) Default mode should handle 90% of the cases, together
237 * with fixed a/b and single AP modes we should be able to
238 * handle 99%. Sectored modes are extreme cases and i still
239 * haven't found a usage for them. If we decide to support them,
240 * then we must allow the user to set how many tx antennas we
241 * have available
242 */
243 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);
244
245unlock:
246 mutex_unlock(&ah->lock);
247 return ret;
248}
249
250
251static void
252ath5k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
253 struct ieee80211_bss_conf *bss_conf, u32 changes)
254{
255 struct ath5k_vif *avf = (void *)vif->drv_priv;
256 struct ath5k_hw *ah = hw->priv;
257 struct ath_common *common = ath5k_hw_common(ah);
258
259 mutex_lock(&ah->lock);
260
261 if (changes & BSS_CHANGED_BSSID) {
262 /* Cache for later use during resets */
263 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
264 common->curaid = 0;
265 ath5k_hw_set_bssid(ah);
266 mmiowb();
267 }
268
269 if (changes & BSS_CHANGED_BEACON_INT)
270 ah->bintval = bss_conf->beacon_int;
271
272 if (changes & BSS_CHANGED_ERP_SLOT) {
273 int slot_time;
274
275 ah->ah_short_slot = bss_conf->use_short_slot;
276 slot_time = ath5k_hw_get_default_slottime(ah) +
277 3 * ah->ah_coverage_class;
278 ath5k_hw_set_ifs_intervals(ah, slot_time);
279 }
280
281 if (changes & BSS_CHANGED_ASSOC) {
282 avf->assoc = bss_conf->assoc;
283 if (bss_conf->assoc)
284 ah->assoc = bss_conf->assoc;
285 else
286 ah->assoc = ath5k_any_vif_assoc(ah);
287
288 if (ah->opmode == NL80211_IFTYPE_STATION)
289 ath5k_set_beacon_filter(hw, ah->assoc);
290 ath5k_hw_set_ledstate(ah, ah->assoc ?
291 AR5K_LED_ASSOC : AR5K_LED_INIT);
292 if (bss_conf->assoc) {
293 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
294 "Bss Info ASSOC %d, bssid: %pM\n",
295 bss_conf->aid, common->curbssid);
296 common->curaid = bss_conf->aid;
297 ath5k_hw_set_bssid(ah);
298 /* Once ANI is available you would start it here */
299 }
300 }
301
302 if (changes & BSS_CHANGED_BEACON) {
303 spin_lock_bh(&ah->block);
304 ath5k_beacon_update(hw, vif);
305 spin_unlock_bh(&ah->block);
306 }
307
308 if (changes & BSS_CHANGED_BEACON_ENABLED)
309 ah->enable_beacon = bss_conf->enable_beacon;
310
311 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
312 BSS_CHANGED_BEACON_INT))
313 ath5k_beacon_config(ah);
314
315 mutex_unlock(&ah->lock);
316}
317
318
319static u64
320ath5k_prepare_multicast(struct ieee80211_hw *hw,
321 struct netdev_hw_addr_list *mc_list)
322{
323 u32 mfilt[2], val;
324 u8 pos;
325 struct netdev_hw_addr *ha;
326
327 mfilt[0] = 0;
328 mfilt[1] = 0;
329
330 netdev_hw_addr_list_for_each(ha, mc_list) {
331 /* calculate XOR of eight 6-bit values */
332 val = get_unaligned_le32(ha->addr + 0);
333 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
334 val = get_unaligned_le32(ha->addr + 3);
335 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
336 pos &= 0x3f;
337 mfilt[pos / 32] |= (1 << (pos % 32));
338 /* XXX: we might be able to just do this instead,
339 * but not sure, needs testing, if we do use this we'd
340 * need to inform below not to reset the mcast */
341 /* ath5k_hw_set_mcast_filterindex(ah,
342 * ha->addr[5]); */
343 }
344
345 return ((u64)(mfilt[1]) << 32) | mfilt[0];
346}
347
348
349/*
350 * o always accept unicast, broadcast, and multicast traffic
351 * o multicast traffic for all BSSIDs will be enabled if mac80211
352 * says it should be
353 * o maintain current state of phy ofdm or phy cck error reception.
354 * If the hardware detects any of these type of errors then
355 * ath5k_hw_get_rx_filter() will pass to us the respective
356 * hardware filters to be able to receive these type of frames.
357 * o probe request frames are accepted only when operating in
358 * hostap, adhoc, or monitor modes
359 * o enable promiscuous mode according to the interface state
360 * o accept beacons:
361 * - when operating in adhoc mode so the 802.11 layer creates
362 * node table entries for peers,
363 * - when operating in station mode for collecting rssi data when
364 * the station is otherwise quiet, or
365 * - when scanning
366 */
367static void
368ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
369 unsigned int *new_flags, u64 multicast)
370{
371#define SUPPORTED_FIF_FLAGS \
372 (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
373 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
374 FIF_BCN_PRBRESP_PROMISC)
375
376 struct ath5k_hw *ah = hw->priv;
377 u32 mfilt[2], rfilt;
378 struct ath5k_vif_iter_data iter_data; /* to count STA interfaces */
379
380 mutex_lock(&ah->lock);
381
382 mfilt[0] = multicast;
383 mfilt[1] = multicast >> 32;
384
385 /* Only deal with supported flags */
386 changed_flags &= SUPPORTED_FIF_FLAGS;
387 *new_flags &= SUPPORTED_FIF_FLAGS;
388
389 /* If HW detects any phy or radar errors, leave those filters on.
390 * Also, always enable Unicast, Broadcasts and Multicast
391 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
392 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
393 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
394 AR5K_RX_FILTER_MCAST);
395
396 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
397 if (*new_flags & FIF_PROMISC_IN_BSS)
398 __set_bit(ATH_STAT_PROMISC, ah->status);
399 else
400 __clear_bit(ATH_STAT_PROMISC, ah->status);
401 }
402
403 if (test_bit(ATH_STAT_PROMISC, ah->status))
404 rfilt |= AR5K_RX_FILTER_PROM;
405
406 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
407 if (*new_flags & FIF_ALLMULTI) {
408 mfilt[0] = ~0;
409 mfilt[1] = ~0;
410 }
411
412 /* This is the best we can do */
413 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
414 rfilt |= AR5K_RX_FILTER_PHYERR;
415
416 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
417 * and probes for any BSSID */
418 if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (ah->nvifs > 1))
419 rfilt |= AR5K_RX_FILTER_BEACON;
420
421 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
422 * set we should only pass on control frames for this
423 * station. This needs testing. I believe right now this
424 * enables *all* control frames, which is OK.. but
425 * but we should see if we can improve on granularity */
426 if (*new_flags & FIF_CONTROL)
427 rfilt |= AR5K_RX_FILTER_CONTROL;
428
429 /* Additional settings per mode -- this is per ath5k */
430
431 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
432
433 switch (ah->opmode) {
434 case NL80211_IFTYPE_MESH_POINT:
435 rfilt |= AR5K_RX_FILTER_CONTROL |
436 AR5K_RX_FILTER_BEACON |
437 AR5K_RX_FILTER_PROBEREQ |
438 AR5K_RX_FILTER_PROM;
439 break;
440 case NL80211_IFTYPE_AP:
441 case NL80211_IFTYPE_ADHOC:
442 rfilt |= AR5K_RX_FILTER_PROBEREQ |
443 AR5K_RX_FILTER_BEACON;
444 break;
445 case NL80211_IFTYPE_STATION:
446 if (ah->assoc)
447 rfilt |= AR5K_RX_FILTER_BEACON;
448 default:
449 break;
450 }
451
452 iter_data.hw_macaddr = NULL;
453 iter_data.n_stas = 0;
454 iter_data.need_set_hw_addr = false;
455 ieee80211_iterate_active_interfaces_atomic(
456 ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
457 ath5k_vif_iter, &iter_data);
458
459 /* Set up RX Filter */
460 if (iter_data.n_stas > 1) {
461 /* If you have multiple STA interfaces connected to
462 * different APs, ARPs are not received (most of the time?)
463 * Enabling PROMISC appears to fix that problem.
464 */
465 rfilt |= AR5K_RX_FILTER_PROM;
466 }
467
468 /* Set filters */
469 ath5k_hw_set_rx_filter(ah, rfilt);
470
471 /* Set multicast bits */
472 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
473 /* Set the cached hw filter flags, this will later actually
474 * be set in HW */
475 ah->filter_flags = rfilt;
476
477 mutex_unlock(&ah->lock);
478}
479
480
481static int
482ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
483 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
484 struct ieee80211_key_conf *key)
485{
486 struct ath5k_hw *ah = hw->priv;
487 struct ath_common *common = ath5k_hw_common(ah);
488 int ret = 0;
489
490 if (ath5k_modparam_nohwcrypt)
491 return -EOPNOTSUPP;
492
493 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT)
494 return -EOPNOTSUPP;
495
496 if (vif->type == NL80211_IFTYPE_ADHOC &&
497 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
498 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
499 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
500 /* don't program group keys when using IBSS_RSN */
501 return -EOPNOTSUPP;
502 }
503
504 switch (key->cipher) {
505 case WLAN_CIPHER_SUITE_WEP40:
506 case WLAN_CIPHER_SUITE_WEP104:
507 case WLAN_CIPHER_SUITE_TKIP:
508 break;
509 case WLAN_CIPHER_SUITE_CCMP:
510 if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
511 break;
512 return -EOPNOTSUPP;
513 default:
514 WARN_ON(1);
515 return -EINVAL;
516 }
517
518 mutex_lock(&ah->lock);
519
520 switch (cmd) {
521 case SET_KEY:
522 ret = ath_key_config(common, vif, sta, key);
523 if (ret >= 0) {
524 key->hw_key_idx = ret;
525 /* push IV and Michael MIC generation to stack */
526 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
527 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
528 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
529 if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
530 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
531 ret = 0;
532 }
533 break;
534 case DISABLE_KEY:
535 ath_key_delete(common, key);
536 break;
537 default:
538 ret = -EINVAL;
539 }
540
541 mmiowb();
542 mutex_unlock(&ah->lock);
543 return ret;
544}
545
546
547static void
548ath5k_sw_scan_start(struct ieee80211_hw *hw)
549{
550 struct ath5k_hw *ah = hw->priv;
551 if (!ah->assoc)
552 ath5k_hw_set_ledstate(ah, AR5K_LED_SCAN);
553}
554
555
556static void
557ath5k_sw_scan_complete(struct ieee80211_hw *hw)
558{
559 struct ath5k_hw *ah = hw->priv;
560 ath5k_hw_set_ledstate(ah, ah->assoc ?
561 AR5K_LED_ASSOC : AR5K_LED_INIT);
562}
563
564
565static int
566ath5k_get_stats(struct ieee80211_hw *hw,
567 struct ieee80211_low_level_stats *stats)
568{
569 struct ath5k_hw *ah = hw->priv;
570
571 /* Force update */
572 ath5k_hw_update_mib_counters(ah);
573
574 stats->dot11ACKFailureCount = ah->stats.ack_fail;
575 stats->dot11RTSFailureCount = ah->stats.rts_fail;
576 stats->dot11RTSSuccessCount = ah->stats.rts_ok;
577 stats->dot11FCSErrorCount = ah->stats.fcs_error;
578
579 return 0;
580}
581
582
583static int
584ath5k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
585 const struct ieee80211_tx_queue_params *params)
586{
587 struct ath5k_hw *ah = hw->priv;
588 struct ath5k_txq_info qi;
589 int ret = 0;
590
591 if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
592 return 0;
593
594 mutex_lock(&ah->lock);
595
596 ath5k_hw_get_tx_queueprops(ah, queue, &qi);
597
598 qi.tqi_aifs = params->aifs;
599 qi.tqi_cw_min = params->cw_min;
600 qi.tqi_cw_max = params->cw_max;
601 qi.tqi_burst_time = params->txop * 32;
602
603 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
604 "Configure tx [queue %d], "
605 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
606 queue, params->aifs, params->cw_min,
607 params->cw_max, params->txop);
608
609 if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
610 ATH5K_ERR(ah,
611 "Unable to update hardware queue %u!\n", queue);
612 ret = -EIO;
613 } else
614 ath5k_hw_reset_tx_queue(ah, queue);
615
616 mutex_unlock(&ah->lock);
617
618 return ret;
619}
620
621
622static u64
623ath5k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
624{
625 struct ath5k_hw *ah = hw->priv;
626
627 return ath5k_hw_get_tsf64(ah);
628}
629
630
631static void
632ath5k_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf)
633{
634 struct ath5k_hw *ah = hw->priv;
635
636 ath5k_hw_set_tsf64(ah, tsf);
637}
638
639
640static void
641ath5k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
642{
643 struct ath5k_hw *ah = hw->priv;
644
645 /*
646 * in IBSS mode we need to update the beacon timers too.
647 * this will also reset the TSF if we call it with 0
648 */
649 if (ah->opmode == NL80211_IFTYPE_ADHOC)
650 ath5k_beacon_update_timers(ah, 0);
651 else
652 ath5k_hw_reset_tsf(ah);
653}
654
655
656static int
657ath5k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey)
658{
659 struct ath5k_hw *ah = hw->priv;
660 struct ieee80211_conf *conf = &hw->conf;
661 struct ath_common *common = ath5k_hw_common(ah);
662 struct ath_cycle_counters *cc = &common->cc_survey;
663 unsigned int div = common->clockrate * 1000;
664
665 if (idx != 0)
666 return -ENOENT;
667
668 spin_lock_bh(&common->cc_lock);
669 ath_hw_cycle_counters_update(common);
670 if (cc->cycles > 0) {
671 ah->survey.channel_time += cc->cycles / div;
672 ah->survey.channel_time_busy += cc->rx_busy / div;
673 ah->survey.channel_time_rx += cc->rx_frame / div;
674 ah->survey.channel_time_tx += cc->tx_frame / div;
675 }
676 memset(cc, 0, sizeof(*cc));
677 spin_unlock_bh(&common->cc_lock);
678
679 memcpy(survey, &ah->survey, sizeof(*survey));
680
681 survey->channel = conf->chandef.chan;
682 survey->noise = ah->ah_noise_floor;
683 survey->filled = SURVEY_INFO_NOISE_DBM |
684 SURVEY_INFO_IN_USE |
685 SURVEY_INFO_CHANNEL_TIME |
686 SURVEY_INFO_CHANNEL_TIME_BUSY |
687 SURVEY_INFO_CHANNEL_TIME_RX |
688 SURVEY_INFO_CHANNEL_TIME_TX;
689
690 return 0;
691}
692
693
694/**
695 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
696 *
697 * @hw: struct ieee80211_hw pointer
698 * @coverage_class: IEEE 802.11 coverage class number
699 *
700 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
701 * coverage class. The values are persistent, they are restored after device
702 * reset.
703 */
704static void
705ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
706{
707 struct ath5k_hw *ah = hw->priv;
708
709 mutex_lock(&ah->lock);
710 ath5k_hw_set_coverage_class(ah, coverage_class);
711 mutex_unlock(&ah->lock);
712}
713
714
715static int
716ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
717{
718 struct ath5k_hw *ah = hw->priv;
719
720 if (tx_ant == 1 && rx_ant == 1)
721 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_A);
722 else if (tx_ant == 2 && rx_ant == 2)
723 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_B);
724 else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3)
725 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT);
726 else
727 return -EINVAL;
728 return 0;
729}
730
731
732static int
733ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
734{
735 struct ath5k_hw *ah = hw->priv;
736
737 switch (ah->ah_ant_mode) {
738 case AR5K_ANTMODE_FIXED_A:
739 *tx_ant = 1; *rx_ant = 1; break;
740 case AR5K_ANTMODE_FIXED_B:
741 *tx_ant = 2; *rx_ant = 2; break;
742 case AR5K_ANTMODE_DEFAULT:
743 *tx_ant = 3; *rx_ant = 3; break;
744 }
745 return 0;
746}
747
748
749static void ath5k_get_ringparam(struct ieee80211_hw *hw,
750 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
751{
752 struct ath5k_hw *ah = hw->priv;
753
754 *tx = ah->txqs[AR5K_TX_QUEUE_ID_DATA_MIN].txq_max;
755
756 *tx_max = ATH5K_TXQ_LEN_MAX;
757 *rx = *rx_max = ATH_RXBUF;
758}
759
760
761static int ath5k_set_ringparam(struct ieee80211_hw *hw, u32 tx, u32 rx)
762{
763 struct ath5k_hw *ah = hw->priv;
764 u16 qnum;
765
766 /* only support setting tx ring size for now */
767 if (rx != ATH_RXBUF)
768 return -EINVAL;
769
770 /* restrict tx ring size min/max */
771 if (!tx || tx > ATH5K_TXQ_LEN_MAX)
772 return -EINVAL;
773
774 for (qnum = 0; qnum < ARRAY_SIZE(ah->txqs); qnum++) {
775 if (!ah->txqs[qnum].setup)
776 continue;
777 if (ah->txqs[qnum].qnum < AR5K_TX_QUEUE_ID_DATA_MIN ||
778 ah->txqs[qnum].qnum > AR5K_TX_QUEUE_ID_DATA_MAX)
779 continue;
780
781 ah->txqs[qnum].txq_max = tx;
782 if (ah->txqs[qnum].txq_len >= ah->txqs[qnum].txq_max)
783 ieee80211_stop_queue(hw, ah->txqs[qnum].qnum);
784 }
785
786 return 0;
787}
788
789
790const struct ieee80211_ops ath5k_hw_ops = {
791 .tx = ath5k_tx,
792 .start = ath5k_start,
793 .stop = ath5k_stop,
794 .add_interface = ath5k_add_interface,
795 /* .change_interface = not implemented */
796 .remove_interface = ath5k_remove_interface,
797 .config = ath5k_config,
798 .bss_info_changed = ath5k_bss_info_changed,
799 .prepare_multicast = ath5k_prepare_multicast,
800 .configure_filter = ath5k_configure_filter,
801 /* .set_tim = not implemented */
802 .set_key = ath5k_set_key,
803 /* .update_tkip_key = not implemented */
804 /* .hw_scan = not implemented */
805 .sw_scan_start = ath5k_sw_scan_start,
806 .sw_scan_complete = ath5k_sw_scan_complete,
807 .get_stats = ath5k_get_stats,
808 /* .get_tkip_seq = not implemented */
809 /* .set_frag_threshold = not implemented */
810 /* .set_rts_threshold = not implemented */
811 /* .sta_add = not implemented */
812 /* .sta_remove = not implemented */
813 /* .sta_notify = not implemented */
814 .conf_tx = ath5k_conf_tx,
815 .get_tsf = ath5k_get_tsf,
816 .set_tsf = ath5k_set_tsf,
817 .reset_tsf = ath5k_reset_tsf,
818 /* .tx_last_beacon = not implemented */
819 /* .ampdu_action = not needed */
820 .get_survey = ath5k_get_survey,
821 .set_coverage_class = ath5k_set_coverage_class,
822 /* .rfkill_poll = not implemented */
823 /* .flush = not implemented */
824 /* .channel_switch = not implemented */
825 /* .napi_poll = not implemented */
826 .set_antenna = ath5k_set_antenna,
827 .get_antenna = ath5k_get_antenna,
828 .set_ringparam = ath5k_set_ringparam,
829 .get_ringparam = ath5k_get_ringparam,
830};