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 <linux/unaligned.h>
48
49 #include "ath5k.h"
50 #include "base.h"
51 #include "reg.h"
52
53 /********************\
54 * Mac80211 functions *
55 \********************/
56
57 static void
ath5k_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)58 ath5k_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
73 static int
ath5k_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)74 ath5k_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;
151 end:
152 mutex_unlock(&ah->lock);
153 return ret;
154 }
155
156
157 static void
ath5k_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)158 ath5k_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 */
194 static int
ath5k_config(struct ieee80211_hw * hw,u32 changed)195 ath5k_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
245 unlock:
246 mutex_unlock(&ah->lock);
247 return ret;
248 }
249
250
251 static void
ath5k_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changes)252 ath5k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
253 struct ieee80211_bss_conf *bss_conf, u64 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 }
267
268 if (changes & BSS_CHANGED_BEACON_INT)
269 ah->bintval = bss_conf->beacon_int;
270
271 if (changes & BSS_CHANGED_ERP_SLOT) {
272 int slot_time;
273
274 ah->ah_short_slot = bss_conf->use_short_slot;
275 slot_time = ath5k_hw_get_default_slottime(ah) +
276 3 * ah->ah_coverage_class;
277 ath5k_hw_set_ifs_intervals(ah, slot_time);
278 }
279
280 if (changes & BSS_CHANGED_ASSOC) {
281 avf->assoc = vif->cfg.assoc;
282 if (vif->cfg.assoc)
283 ah->assoc = vif->cfg.assoc;
284 else
285 ah->assoc = ath5k_any_vif_assoc(ah);
286
287 if (ah->opmode == NL80211_IFTYPE_STATION)
288 ath5k_set_beacon_filter(hw, ah->assoc);
289 ath5k_hw_set_ledstate(ah, ah->assoc ?
290 AR5K_LED_ASSOC : AR5K_LED_INIT);
291 if (vif->cfg.assoc) {
292 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
293 "Bss Info ASSOC %d, bssid: %pM\n",
294 vif->cfg.aid, common->curbssid);
295 common->curaid = vif->cfg.aid;
296 ath5k_hw_set_bssid(ah);
297 /* Once ANI is available you would start it here */
298 }
299 }
300
301 if (changes & BSS_CHANGED_BEACON) {
302 spin_lock_bh(&ah->block);
303 ath5k_beacon_update(hw, vif);
304 spin_unlock_bh(&ah->block);
305 }
306
307 if (changes & BSS_CHANGED_BEACON_ENABLED)
308 ah->enable_beacon = bss_conf->enable_beacon;
309
310 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
311 BSS_CHANGED_BEACON_INT))
312 ath5k_beacon_config(ah);
313
314 mutex_unlock(&ah->lock);
315 }
316
317
318 static u64
ath5k_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)319 ath5k_prepare_multicast(struct ieee80211_hw *hw,
320 struct netdev_hw_addr_list *mc_list)
321 {
322 u32 mfilt[2], val;
323 u8 pos;
324 struct netdev_hw_addr *ha;
325
326 mfilt[0] = 0;
327 mfilt[1] = 0;
328
329 netdev_hw_addr_list_for_each(ha, mc_list) {
330 /* calculate XOR of eight 6-bit values */
331 val = get_unaligned_le32(ha->addr + 0);
332 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
333 val = get_unaligned_le32(ha->addr + 3);
334 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
335 pos &= 0x3f;
336 mfilt[pos / 32] |= (1 << (pos % 32));
337 /* XXX: we might be able to just do this instead,
338 * but not sure, needs testing, if we do use this we'd
339 * need to inform below not to reset the mcast */
340 /* ath5k_hw_set_mcast_filterindex(ah,
341 * ha->addr[5]); */
342 }
343
344 return ((u64)(mfilt[1]) << 32) | mfilt[0];
345 }
346
347
348 /*
349 * o always accept unicast, broadcast, and multicast traffic
350 * o multicast traffic for all BSSIDs will be enabled if mac80211
351 * says it should be
352 * o maintain current state of phy ofdm or phy cck error reception.
353 * If the hardware detects any of these type of errors then
354 * ath5k_hw_get_rx_filter() will pass to us the respective
355 * hardware filters to be able to receive these type of frames.
356 * o probe request frames are accepted only when operating in
357 * hostap, adhoc, or monitor modes
358 * o enable promiscuous mode according to the interface state
359 * o accept beacons:
360 * - when operating in adhoc mode so the 802.11 layer creates
361 * node table entries for peers,
362 * - when operating in station mode for collecting rssi data when
363 * the station is otherwise quiet, or
364 * - when scanning
365 */
366 static void
ath5k_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * new_flags,u64 multicast)367 ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
368 unsigned int *new_flags, u64 multicast)
369 {
370 #define SUPPORTED_FIF_FLAGS \
371 (FIF_ALLMULTI | FIF_FCSFAIL | \
372 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
373 FIF_BCN_PRBRESP_PROMISC)
374
375 struct ath5k_hw *ah = hw->priv;
376 u32 mfilt[2], rfilt;
377 struct ath5k_vif_iter_data iter_data; /* to count STA interfaces */
378
379 mutex_lock(&ah->lock);
380
381 mfilt[0] = multicast;
382 mfilt[1] = multicast >> 32;
383
384 /* Only deal with supported flags */
385 *new_flags &= SUPPORTED_FIF_FLAGS;
386
387 /* If HW detects any phy or radar errors, leave those filters on.
388 * Also, always enable Unicast, Broadcasts and Multicast
389 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
390 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
391 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
392 AR5K_RX_FILTER_MCAST);
393
394 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
395 if (*new_flags & FIF_ALLMULTI) {
396 mfilt[0] = ~0;
397 mfilt[1] = ~0;
398 }
399
400 /* This is the best we can do */
401 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
402 rfilt |= AR5K_RX_FILTER_PHYERR;
403
404 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
405 * and probes for any BSSID */
406 if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (ah->nvifs > 1))
407 rfilt |= AR5K_RX_FILTER_BEACON;
408
409 /* FIF_CONTROL doc says we should only pass on control frames for this
410 * station. This needs testing. I believe right now this
411 * enables *all* control frames, which is OK.. but
412 * we should see if we can improve on granularity */
413 if (*new_flags & FIF_CONTROL)
414 rfilt |= AR5K_RX_FILTER_CONTROL;
415
416 /* Additional settings per mode -- this is per ath5k */
417
418 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
419
420 switch (ah->opmode) {
421 case NL80211_IFTYPE_MESH_POINT:
422 rfilt |= AR5K_RX_FILTER_CONTROL |
423 AR5K_RX_FILTER_BEACON |
424 AR5K_RX_FILTER_PROBEREQ |
425 AR5K_RX_FILTER_PROM;
426 break;
427 case NL80211_IFTYPE_AP:
428 case NL80211_IFTYPE_ADHOC:
429 rfilt |= AR5K_RX_FILTER_PROBEREQ |
430 AR5K_RX_FILTER_BEACON;
431 break;
432 case NL80211_IFTYPE_STATION:
433 if (ah->assoc)
434 rfilt |= AR5K_RX_FILTER_BEACON;
435 break;
436 default:
437 break;
438 }
439
440 iter_data.hw_macaddr = NULL;
441 iter_data.n_stas = 0;
442 iter_data.need_set_hw_addr = false;
443 ieee80211_iterate_active_interfaces_atomic(
444 ah->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
445 ath5k_vif_iter, &iter_data);
446
447 /* Set up RX Filter */
448 if (iter_data.n_stas > 1) {
449 /* If you have multiple STA interfaces connected to
450 * different APs, ARPs are not received (most of the time?)
451 * Enabling PROMISC appears to fix that problem.
452 */
453 rfilt |= AR5K_RX_FILTER_PROM;
454 }
455
456 /* Set filters */
457 ath5k_hw_set_rx_filter(ah, rfilt);
458
459 /* Set multicast bits */
460 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
461 /* Set the cached hw filter flags, this will later actually
462 * be set in HW */
463 ah->filter_flags = rfilt;
464 /* Store current FIF filter flags */
465 ah->fif_filter_flags = *new_flags;
466
467 mutex_unlock(&ah->lock);
468 }
469
470
471 static int
ath5k_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)472 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
473 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
474 struct ieee80211_key_conf *key)
475 {
476 struct ath5k_hw *ah = hw->priv;
477 struct ath_common *common = ath5k_hw_common(ah);
478 int ret = 0;
479
480 if (ath5k_modparam_nohwcrypt)
481 return -EOPNOTSUPP;
482
483 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT)
484 return -EOPNOTSUPP;
485
486 if (vif->type == NL80211_IFTYPE_ADHOC &&
487 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
488 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
489 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
490 /* don't program group keys when using IBSS_RSN */
491 return -EOPNOTSUPP;
492 }
493
494 switch (key->cipher) {
495 case WLAN_CIPHER_SUITE_WEP40:
496 case WLAN_CIPHER_SUITE_WEP104:
497 case WLAN_CIPHER_SUITE_TKIP:
498 break;
499 case WLAN_CIPHER_SUITE_CCMP:
500 if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
501 break;
502 return -EOPNOTSUPP;
503 default:
504 return -EOPNOTSUPP;
505 }
506
507 mutex_lock(&ah->lock);
508
509 switch (cmd) {
510 case SET_KEY:
511 ret = ath_key_config(common, vif, sta, key);
512 if (ret >= 0) {
513 key->hw_key_idx = ret;
514 /* push IV and Michael MIC generation to stack */
515 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
516 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
517 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
518 if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
519 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
520 ret = 0;
521 }
522 break;
523 case DISABLE_KEY:
524 ath_key_delete(common, key->hw_key_idx);
525 break;
526 default:
527 ret = -EINVAL;
528 }
529
530 mutex_unlock(&ah->lock);
531 return ret;
532 }
533
534
535 static void
ath5k_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)536 ath5k_sw_scan_start(struct ieee80211_hw *hw,
537 struct ieee80211_vif *vif,
538 const u8 *mac_addr)
539 {
540 struct ath5k_hw *ah = hw->priv;
541 if (!ah->assoc)
542 ath5k_hw_set_ledstate(ah, AR5K_LED_SCAN);
543 }
544
545
546 static void
ath5k_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)547 ath5k_sw_scan_complete(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
548 {
549 struct ath5k_hw *ah = hw->priv;
550 ath5k_hw_set_ledstate(ah, ah->assoc ?
551 AR5K_LED_ASSOC : AR5K_LED_INIT);
552 }
553
554
555 static int
ath5k_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)556 ath5k_get_stats(struct ieee80211_hw *hw,
557 struct ieee80211_low_level_stats *stats)
558 {
559 struct ath5k_hw *ah = hw->priv;
560
561 /* Force update */
562 ath5k_hw_update_mib_counters(ah);
563
564 stats->dot11ACKFailureCount = ah->stats.ack_fail;
565 stats->dot11RTSFailureCount = ah->stats.rts_fail;
566 stats->dot11RTSSuccessCount = ah->stats.rts_ok;
567 stats->dot11FCSErrorCount = ah->stats.fcs_error;
568
569 return 0;
570 }
571
572
573 static int
ath5k_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)574 ath5k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
575 unsigned int link_id, u16 queue,
576 const struct ieee80211_tx_queue_params *params)
577 {
578 struct ath5k_hw *ah = hw->priv;
579 struct ath5k_txq_info qi;
580 int ret = 0;
581
582 if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
583 return 0;
584
585 mutex_lock(&ah->lock);
586
587 ath5k_hw_get_tx_queueprops(ah, queue, &qi);
588
589 qi.tqi_aifs = params->aifs;
590 qi.tqi_cw_min = params->cw_min;
591 qi.tqi_cw_max = params->cw_max;
592 qi.tqi_burst_time = params->txop * 32;
593
594 ATH5K_DBG(ah, ATH5K_DEBUG_ANY,
595 "Configure tx [queue %d], "
596 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
597 queue, params->aifs, params->cw_min,
598 params->cw_max, params->txop);
599
600 if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
601 ATH5K_ERR(ah,
602 "Unable to update hardware queue %u!\n", queue);
603 ret = -EIO;
604 } else
605 ath5k_hw_reset_tx_queue(ah, queue);
606
607 mutex_unlock(&ah->lock);
608
609 return ret;
610 }
611
612
613 static u64
ath5k_get_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)614 ath5k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
615 {
616 struct ath5k_hw *ah = hw->priv;
617
618 return ath5k_hw_get_tsf64(ah);
619 }
620
621
622 static void
ath5k_set_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u64 tsf)623 ath5k_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf)
624 {
625 struct ath5k_hw *ah = hw->priv;
626
627 ath5k_hw_set_tsf64(ah, tsf);
628 }
629
630
631 static void
ath5k_reset_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)632 ath5k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
633 {
634 struct ath5k_hw *ah = hw->priv;
635
636 /*
637 * in IBSS mode we need to update the beacon timers too.
638 * this will also reset the TSF if we call it with 0
639 */
640 if (ah->opmode == NL80211_IFTYPE_ADHOC)
641 ath5k_beacon_update_timers(ah, 0);
642 else
643 ath5k_hw_reset_tsf(ah);
644 }
645
646
647 static int
ath5k_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)648 ath5k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey)
649 {
650 struct ath5k_hw *ah = hw->priv;
651 struct ieee80211_conf *conf = &hw->conf;
652 struct ath_common *common = ath5k_hw_common(ah);
653 struct ath_cycle_counters *cc = &common->cc_survey;
654 unsigned int div = common->clockrate * 1000;
655
656 if (idx != 0)
657 return -ENOENT;
658
659 spin_lock_bh(&common->cc_lock);
660 ath_hw_cycle_counters_update(common);
661 if (cc->cycles > 0) {
662 ah->survey.time += cc->cycles / div;
663 ah->survey.time_busy += cc->rx_busy / div;
664 ah->survey.time_rx += cc->rx_frame / div;
665 ah->survey.time_tx += cc->tx_frame / div;
666 }
667 memset(cc, 0, sizeof(*cc));
668 spin_unlock_bh(&common->cc_lock);
669
670 memcpy(survey, &ah->survey, sizeof(*survey));
671
672 survey->channel = conf->chandef.chan;
673 survey->noise = ah->ah_noise_floor;
674 survey->filled = SURVEY_INFO_NOISE_DBM |
675 SURVEY_INFO_IN_USE |
676 SURVEY_INFO_TIME |
677 SURVEY_INFO_TIME_BUSY |
678 SURVEY_INFO_TIME_RX |
679 SURVEY_INFO_TIME_TX;
680
681 return 0;
682 }
683
684
685 /**
686 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
687 *
688 * @hw: struct ieee80211_hw pointer
689 * @coverage_class: IEEE 802.11 coverage class number
690 *
691 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
692 * coverage class. The values are persistent, they are restored after device
693 * reset.
694 */
695 static void
ath5k_set_coverage_class(struct ieee80211_hw * hw,s16 coverage_class)696 ath5k_set_coverage_class(struct ieee80211_hw *hw, s16 coverage_class)
697 {
698 struct ath5k_hw *ah = hw->priv;
699
700 mutex_lock(&ah->lock);
701 ath5k_hw_set_coverage_class(ah, coverage_class);
702 mutex_unlock(&ah->lock);
703 }
704
705
706 static int
ath5k_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)707 ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
708 {
709 struct ath5k_hw *ah = hw->priv;
710
711 if (tx_ant == 1 && rx_ant == 1)
712 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_A);
713 else if (tx_ant == 2 && rx_ant == 2)
714 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_FIXED_B);
715 else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3)
716 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT);
717 else
718 return -EINVAL;
719 return 0;
720 }
721
722
723 static int
ath5k_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)724 ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
725 {
726 struct ath5k_hw *ah = hw->priv;
727
728 switch (ah->ah_ant_mode) {
729 case AR5K_ANTMODE_FIXED_A:
730 *tx_ant = 1; *rx_ant = 1; break;
731 case AR5K_ANTMODE_FIXED_B:
732 *tx_ant = 2; *rx_ant = 2; break;
733 case AR5K_ANTMODE_DEFAULT:
734 *tx_ant = 3; *rx_ant = 3; break;
735 }
736 return 0;
737 }
738
739
ath5k_get_ringparam(struct ieee80211_hw * hw,u32 * tx,u32 * tx_max,u32 * rx,u32 * rx_max)740 static void ath5k_get_ringparam(struct ieee80211_hw *hw,
741 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max)
742 {
743 struct ath5k_hw *ah = hw->priv;
744
745 *tx = ah->txqs[AR5K_TX_QUEUE_ID_DATA_MIN].txq_max;
746
747 *tx_max = ATH5K_TXQ_LEN_MAX;
748 *rx = *rx_max = ATH_RXBUF;
749 }
750
751
ath5k_set_ringparam(struct ieee80211_hw * hw,u32 tx,u32 rx)752 static int ath5k_set_ringparam(struct ieee80211_hw *hw, u32 tx, u32 rx)
753 {
754 struct ath5k_hw *ah = hw->priv;
755 u16 qnum;
756
757 /* only support setting tx ring size for now */
758 if (rx != ATH_RXBUF)
759 return -EINVAL;
760
761 /* restrict tx ring size min/max */
762 if (!tx || tx > ATH5K_TXQ_LEN_MAX)
763 return -EINVAL;
764
765 for (qnum = 0; qnum < ARRAY_SIZE(ah->txqs); qnum++) {
766 if (!ah->txqs[qnum].setup)
767 continue;
768 if (ah->txqs[qnum].qnum < AR5K_TX_QUEUE_ID_DATA_MIN ||
769 ah->txqs[qnum].qnum > AR5K_TX_QUEUE_ID_DATA_MAX)
770 continue;
771
772 ah->txqs[qnum].txq_max = tx;
773 if (ah->txqs[qnum].txq_len >= ah->txqs[qnum].txq_max)
774 ieee80211_stop_queue(hw, ah->txqs[qnum].qnum);
775 }
776
777 return 0;
778 }
779
780
781 const struct ieee80211_ops ath5k_hw_ops = {
782 .add_chanctx = ieee80211_emulate_add_chanctx,
783 .remove_chanctx = ieee80211_emulate_remove_chanctx,
784 .change_chanctx = ieee80211_emulate_change_chanctx,
785 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
786 .tx = ath5k_tx,
787 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
788 .start = ath5k_start,
789 .stop = ath5k_stop,
790 .add_interface = ath5k_add_interface,
791 /* .change_interface = not implemented */
792 .remove_interface = ath5k_remove_interface,
793 .config = ath5k_config,
794 .bss_info_changed = ath5k_bss_info_changed,
795 .prepare_multicast = ath5k_prepare_multicast,
796 .configure_filter = ath5k_configure_filter,
797 /* .set_tim = not implemented */
798 .set_key = ath5k_set_key,
799 /* .update_tkip_key = not implemented */
800 /* .hw_scan = not implemented */
801 .sw_scan_start = ath5k_sw_scan_start,
802 .sw_scan_complete = ath5k_sw_scan_complete,
803 .get_stats = ath5k_get_stats,
804 /* .set_frag_threshold = not implemented */
805 /* .set_rts_threshold = not implemented */
806 /* .sta_add = not implemented */
807 /* .sta_remove = not implemented */
808 /* .sta_notify = not implemented */
809 .conf_tx = ath5k_conf_tx,
810 .get_tsf = ath5k_get_tsf,
811 .set_tsf = ath5k_set_tsf,
812 .reset_tsf = ath5k_reset_tsf,
813 /* .tx_last_beacon = not implemented */
814 /* .ampdu_action = not needed */
815 .get_survey = ath5k_get_survey,
816 .set_coverage_class = ath5k_set_coverage_class,
817 /* .rfkill_poll = not implemented */
818 /* .flush = not implemented */
819 /* .channel_switch = not implemented */
820 /* .napi_poll = not implemented */
821 .set_antenna = ath5k_set_antenna,
822 .get_antenna = ath5k_get_antenna,
823 .set_ringparam = ath5k_set_ringparam,
824 .get_ringparam = ath5k_get_ringparam,
825 };
826