1 /*
2 * mac80211 glue code for mac80211 Prism54 drivers
3 *
4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 *
8 * Based on:
9 * - the islsm (softmac prism54) driver, which is:
10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
11 * - stlc45xx driver
12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18
19 #include <linux/slab.h>
20 #include <linux/firmware.h>
21 #include <linux/etherdevice.h>
22 #include <linux/module.h>
23
24 #include <net/mac80211.h>
25
26 #include "p54.h"
27 #include "lmac.h"
28
29 static bool modparam_nohwcrypt;
30 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
31 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
32 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
33 MODULE_DESCRIPTION("Softmac Prism54 common code");
34 MODULE_LICENSE("GPL");
35 MODULE_ALIAS("prism54common");
36
p54_sta_add_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)37 static int p54_sta_add_remove(struct ieee80211_hw *hw,
38 struct ieee80211_vif *vif,
39 struct ieee80211_sta *sta)
40 {
41 struct p54_common *priv = hw->priv;
42
43 /*
44 * Notify the firmware that we don't want or we don't
45 * need to buffer frames for this station anymore.
46 */
47
48 p54_sta_unlock(priv, sta->addr);
49
50 return 0;
51 }
52
p54_sta_notify(struct ieee80211_hw * dev,struct ieee80211_vif * vif,enum sta_notify_cmd notify_cmd,struct ieee80211_sta * sta)53 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
54 enum sta_notify_cmd notify_cmd,
55 struct ieee80211_sta *sta)
56 {
57 struct p54_common *priv = dev->priv;
58
59 switch (notify_cmd) {
60 case STA_NOTIFY_AWAKE:
61 /* update the firmware's filter table */
62 p54_sta_unlock(priv, sta->addr);
63 break;
64 default:
65 break;
66 }
67 }
68
p54_set_tim(struct ieee80211_hw * dev,struct ieee80211_sta * sta,bool set)69 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
70 bool set)
71 {
72 struct p54_common *priv = dev->priv;
73
74 return p54_update_beacon_tim(priv, sta->aid, set);
75 }
76
p54_find_ie(struct sk_buff * skb,u8 ie)77 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
78 {
79 struct ieee80211_mgmt *mgmt = (void *)skb->data;
80 u8 *pos, *end;
81
82 if (skb->len <= sizeof(mgmt))
83 return NULL;
84
85 pos = (u8 *)mgmt->u.beacon.variable;
86 end = skb->data + skb->len;
87 while (pos < end) {
88 if (pos + 2 + pos[1] > end)
89 return NULL;
90
91 if (pos[0] == ie)
92 return pos;
93
94 pos += 2 + pos[1];
95 }
96 return NULL;
97 }
98
p54_beacon_format_ie_tim(struct sk_buff * skb)99 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
100 {
101 /*
102 * the good excuse for this mess is ... the firmware.
103 * The dummy TIM MUST be at the end of the beacon frame,
104 * because it'll be overwritten!
105 */
106 u8 *tim;
107 u8 dtim_len;
108 u8 dtim_period;
109 u8 *next;
110
111 tim = p54_find_ie(skb, WLAN_EID_TIM);
112 if (!tim)
113 return 0;
114
115 dtim_len = tim[1];
116 dtim_period = tim[3];
117 next = tim + 2 + dtim_len;
118
119 if (dtim_len < 3)
120 return -EINVAL;
121
122 memmove(tim, next, skb_tail_pointer(skb) - next);
123 tim = skb_tail_pointer(skb) - (dtim_len + 2);
124
125 /* add the dummy at the end */
126 tim[0] = WLAN_EID_TIM;
127 tim[1] = 3;
128 tim[2] = 0;
129 tim[3] = dtim_period;
130 tim[4] = 0;
131
132 if (dtim_len > 3)
133 skb_trim(skb, skb->len - (dtim_len - 3));
134
135 return 0;
136 }
137
p54_beacon_update(struct p54_common * priv,struct ieee80211_vif * vif)138 static int p54_beacon_update(struct p54_common *priv,
139 struct ieee80211_vif *vif)
140 {
141 struct ieee80211_tx_control control = { };
142 struct sk_buff *beacon;
143 int ret;
144
145 beacon = ieee80211_beacon_get(priv->hw, vif);
146 if (!beacon)
147 return -ENOMEM;
148 ret = p54_beacon_format_ie_tim(beacon);
149 if (ret)
150 return ret;
151
152 /*
153 * During operation, the firmware takes care of beaconing.
154 * The driver only needs to upload a new beacon template, once
155 * the template was changed by the stack or userspace.
156 *
157 * LMAC API 3.2.2 also specifies that the driver does not need
158 * to cancel the old beacon template by hand, instead the firmware
159 * will release the previous one through the feedback mechanism.
160 */
161 p54_tx_80211(priv->hw, &control, beacon);
162 priv->tsf_high32 = 0;
163 priv->tsf_low32 = 0;
164
165 return 0;
166 }
167
p54_start(struct ieee80211_hw * dev)168 static int p54_start(struct ieee80211_hw *dev)
169 {
170 struct p54_common *priv = dev->priv;
171 int err;
172
173 mutex_lock(&priv->conf_mutex);
174 err = priv->open(dev);
175 if (err)
176 goto out;
177 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
178 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
179 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
180 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
181 err = p54_set_edcf(priv);
182 if (err)
183 goto out;
184
185 eth_broadcast_addr(priv->bssid);
186 priv->mode = NL80211_IFTYPE_MONITOR;
187 err = p54_setup_mac(priv);
188 if (err) {
189 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
190 goto out;
191 }
192
193 ieee80211_queue_delayed_work(dev, &priv->work, 0);
194
195 priv->softled_state = 0;
196 err = p54_set_leds(priv);
197
198 out:
199 mutex_unlock(&priv->conf_mutex);
200 return err;
201 }
202
p54_stop(struct ieee80211_hw * dev)203 static void p54_stop(struct ieee80211_hw *dev)
204 {
205 struct p54_common *priv = dev->priv;
206 int i;
207
208 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
209 priv->softled_state = 0;
210 cancel_delayed_work_sync(&priv->work);
211 mutex_lock(&priv->conf_mutex);
212 p54_set_leds(priv);
213 priv->stop(dev);
214 skb_queue_purge(&priv->tx_pending);
215 skb_queue_purge(&priv->tx_queue);
216 for (i = 0; i < P54_QUEUE_NUM; i++) {
217 priv->tx_stats[i].count = 0;
218 priv->tx_stats[i].len = 0;
219 }
220
221 priv->beacon_req_id = cpu_to_le32(0);
222 priv->tsf_high32 = priv->tsf_low32 = 0;
223 mutex_unlock(&priv->conf_mutex);
224 }
225
p54_add_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)226 static int p54_add_interface(struct ieee80211_hw *dev,
227 struct ieee80211_vif *vif)
228 {
229 struct p54_common *priv = dev->priv;
230 int err;
231
232 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
233
234 mutex_lock(&priv->conf_mutex);
235 if (priv->mode != NL80211_IFTYPE_MONITOR) {
236 mutex_unlock(&priv->conf_mutex);
237 return -EOPNOTSUPP;
238 }
239
240 priv->vif = vif;
241
242 switch (vif->type) {
243 case NL80211_IFTYPE_STATION:
244 case NL80211_IFTYPE_ADHOC:
245 case NL80211_IFTYPE_AP:
246 case NL80211_IFTYPE_MESH_POINT:
247 priv->mode = vif->type;
248 break;
249 default:
250 mutex_unlock(&priv->conf_mutex);
251 return -EOPNOTSUPP;
252 }
253
254 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
255 err = p54_setup_mac(priv);
256 mutex_unlock(&priv->conf_mutex);
257 return err;
258 }
259
p54_remove_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)260 static void p54_remove_interface(struct ieee80211_hw *dev,
261 struct ieee80211_vif *vif)
262 {
263 struct p54_common *priv = dev->priv;
264
265 mutex_lock(&priv->conf_mutex);
266 priv->vif = NULL;
267
268 /*
269 * LMAC API 3.2.2 states that any active beacon template must be
270 * canceled by the driver before attempting a mode transition.
271 */
272 if (le32_to_cpu(priv->beacon_req_id) != 0) {
273 p54_tx_cancel(priv, priv->beacon_req_id);
274 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
275 }
276 priv->mode = NL80211_IFTYPE_MONITOR;
277 eth_zero_addr(priv->mac_addr);
278 eth_zero_addr(priv->bssid);
279 p54_setup_mac(priv);
280 mutex_unlock(&priv->conf_mutex);
281 }
282
p54_wait_for_stats(struct ieee80211_hw * dev)283 static int p54_wait_for_stats(struct ieee80211_hw *dev)
284 {
285 struct p54_common *priv = dev->priv;
286 int ret;
287
288 priv->update_stats = true;
289 ret = p54_fetch_statistics(priv);
290 if (ret)
291 return ret;
292
293 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
294 if (ret == 0)
295 return -ETIMEDOUT;
296
297 return 0;
298 }
299
p54_reset_stats(struct p54_common * priv)300 static void p54_reset_stats(struct p54_common *priv)
301 {
302 struct ieee80211_channel *chan = priv->curchan;
303
304 if (chan) {
305 struct survey_info *info = &priv->survey[chan->hw_value];
306
307 /* only reset channel statistics, don't touch .filled, etc. */
308 info->time = 0;
309 info->time_busy = 0;
310 info->time_tx = 0;
311 }
312
313 priv->update_stats = true;
314 priv->survey_raw.active = 0;
315 priv->survey_raw.cca = 0;
316 priv->survey_raw.tx = 0;
317 }
318
p54_config(struct ieee80211_hw * dev,u32 changed)319 static int p54_config(struct ieee80211_hw *dev, u32 changed)
320 {
321 int ret = 0;
322 struct p54_common *priv = dev->priv;
323 struct ieee80211_conf *conf = &dev->conf;
324
325 mutex_lock(&priv->conf_mutex);
326 if (changed & IEEE80211_CONF_CHANGE_POWER)
327 priv->output_power = conf->power_level << 2;
328 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
329 struct ieee80211_channel *oldchan;
330 WARN_ON(p54_wait_for_stats(dev));
331 oldchan = priv->curchan;
332 priv->curchan = NULL;
333 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
334 if (ret) {
335 priv->curchan = oldchan;
336 goto out;
337 }
338 /*
339 * TODO: Use the LM_SCAN_TRAP to determine the current
340 * operating channel.
341 */
342 priv->curchan = priv->hw->conf.chandef.chan;
343 p54_reset_stats(priv);
344 WARN_ON(p54_fetch_statistics(priv));
345 }
346 if (changed & IEEE80211_CONF_CHANGE_PS) {
347 WARN_ON(p54_wait_for_stats(dev));
348 ret = p54_set_ps(priv);
349 if (ret)
350 goto out;
351 WARN_ON(p54_wait_for_stats(dev));
352 }
353 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
354 WARN_ON(p54_wait_for_stats(dev));
355 ret = p54_setup_mac(priv);
356 if (ret)
357 goto out;
358 WARN_ON(p54_wait_for_stats(dev));
359 }
360
361 out:
362 mutex_unlock(&priv->conf_mutex);
363 return ret;
364 }
365
p54_prepare_multicast(struct ieee80211_hw * dev,struct netdev_hw_addr_list * mc_list)366 static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
367 struct netdev_hw_addr_list *mc_list)
368 {
369 struct p54_common *priv = dev->priv;
370 struct netdev_hw_addr *ha;
371 int i;
372
373 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
374 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
375 /*
376 * The first entry is reserved for the global broadcast MAC.
377 * Otherwise the firmware will drop it and ARP will no longer work.
378 */
379 i = 1;
380 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
381 netdev_hw_addr_list_for_each(ha, mc_list) {
382 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
383 i++;
384 if (i >= ARRAY_SIZE(priv->mc_maclist))
385 break;
386 }
387
388 return 1; /* update */
389 }
390
p54_configure_filter(struct ieee80211_hw * dev,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)391 static void p54_configure_filter(struct ieee80211_hw *dev,
392 unsigned int changed_flags,
393 unsigned int *total_flags,
394 u64 multicast)
395 {
396 struct p54_common *priv = dev->priv;
397
398 *total_flags &= FIF_PROMISC_IN_BSS |
399 FIF_ALLMULTI |
400 FIF_OTHER_BSS;
401
402 priv->filter_flags = *total_flags;
403
404 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
405 p54_setup_mac(priv);
406
407 if (changed_flags & FIF_ALLMULTI || multicast)
408 p54_set_groupfilter(priv);
409 }
410
p54_conf_tx(struct ieee80211_hw * dev,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)411 static int p54_conf_tx(struct ieee80211_hw *dev,
412 struct ieee80211_vif *vif, u16 queue,
413 const struct ieee80211_tx_queue_params *params)
414 {
415 struct p54_common *priv = dev->priv;
416 int ret;
417
418 mutex_lock(&priv->conf_mutex);
419 if (queue < dev->queues) {
420 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
421 params->cw_min, params->cw_max, params->txop);
422 ret = p54_set_edcf(priv);
423 } else
424 ret = -EINVAL;
425 mutex_unlock(&priv->conf_mutex);
426 return ret;
427 }
428
p54_work(struct work_struct * work)429 static void p54_work(struct work_struct *work)
430 {
431 struct p54_common *priv = container_of(work, struct p54_common,
432 work.work);
433
434 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
435 return ;
436
437 /*
438 * TODO: walk through tx_queue and do the following tasks
439 * 1. initiate bursts.
440 * 2. cancel stuck frames / reset the device if necessary.
441 */
442
443 mutex_lock(&priv->conf_mutex);
444 WARN_ON_ONCE(p54_fetch_statistics(priv));
445 mutex_unlock(&priv->conf_mutex);
446 }
447
p54_get_stats(struct ieee80211_hw * dev,struct ieee80211_low_level_stats * stats)448 static int p54_get_stats(struct ieee80211_hw *dev,
449 struct ieee80211_low_level_stats *stats)
450 {
451 struct p54_common *priv = dev->priv;
452
453 memcpy(stats, &priv->stats, sizeof(*stats));
454 return 0;
455 }
456
p54_bss_info_changed(struct ieee80211_hw * dev,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)457 static void p54_bss_info_changed(struct ieee80211_hw *dev,
458 struct ieee80211_vif *vif,
459 struct ieee80211_bss_conf *info,
460 u32 changed)
461 {
462 struct p54_common *priv = dev->priv;
463
464 mutex_lock(&priv->conf_mutex);
465 if (changed & BSS_CHANGED_BSSID) {
466 memcpy(priv->bssid, info->bssid, ETH_ALEN);
467 p54_setup_mac(priv);
468 }
469
470 if (changed & BSS_CHANGED_BEACON) {
471 p54_scan(priv, P54_SCAN_EXIT, 0);
472 p54_setup_mac(priv);
473 p54_beacon_update(priv, vif);
474 p54_set_edcf(priv);
475 }
476
477 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
478 priv->use_short_slot = info->use_short_slot;
479 p54_set_edcf(priv);
480 }
481 if (changed & BSS_CHANGED_BASIC_RATES) {
482 if (dev->conf.chandef.chan->band == IEEE80211_BAND_5GHZ)
483 priv->basic_rate_mask = (info->basic_rates << 4);
484 else
485 priv->basic_rate_mask = info->basic_rates;
486 p54_setup_mac(priv);
487 if (priv->fw_var >= 0x500)
488 p54_scan(priv, P54_SCAN_EXIT, 0);
489 }
490 if (changed & BSS_CHANGED_ASSOC) {
491 if (info->assoc) {
492 priv->aid = info->aid;
493 priv->wakeup_timer = info->beacon_int *
494 info->dtim_period * 5;
495 p54_setup_mac(priv);
496 } else {
497 priv->wakeup_timer = 500;
498 priv->aid = 0;
499 }
500 }
501
502 mutex_unlock(&priv->conf_mutex);
503 }
504
p54_set_key(struct ieee80211_hw * dev,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)505 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
506 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
507 struct ieee80211_key_conf *key)
508 {
509 struct p54_common *priv = dev->priv;
510 int slot, ret = 0;
511 u8 algo = 0;
512 u8 *addr = NULL;
513
514 if (modparam_nohwcrypt)
515 return -EOPNOTSUPP;
516
517 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
518 /*
519 * Unfortunately most/all firmwares are trying to decrypt
520 * incoming management frames if a suitable key can be found.
521 * However, in doing so the data in these frames gets
522 * corrupted. So, we can't have firmware supported crypto
523 * offload in this case.
524 */
525 return -EOPNOTSUPP;
526 }
527
528 mutex_lock(&priv->conf_mutex);
529 if (cmd == SET_KEY) {
530 switch (key->cipher) {
531 case WLAN_CIPHER_SUITE_TKIP:
532 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
533 BR_DESC_PRIV_CAP_TKIP))) {
534 ret = -EOPNOTSUPP;
535 goto out_unlock;
536 }
537 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
538 algo = P54_CRYPTO_TKIPMICHAEL;
539 break;
540 case WLAN_CIPHER_SUITE_WEP40:
541 case WLAN_CIPHER_SUITE_WEP104:
542 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
543 ret = -EOPNOTSUPP;
544 goto out_unlock;
545 }
546 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
547 algo = P54_CRYPTO_WEP;
548 break;
549 case WLAN_CIPHER_SUITE_CCMP:
550 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
551 ret = -EOPNOTSUPP;
552 goto out_unlock;
553 }
554 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
555 algo = P54_CRYPTO_AESCCMP;
556 break;
557 default:
558 ret = -EOPNOTSUPP;
559 goto out_unlock;
560 }
561 slot = bitmap_find_free_region(priv->used_rxkeys,
562 priv->rx_keycache_size, 0);
563
564 if (slot < 0) {
565 /*
566 * The device supports the chosen algorithm, but the
567 * firmware does not provide enough key slots to store
568 * all of them.
569 * But encryption offload for outgoing frames is always
570 * possible, so we just pretend that the upload was
571 * successful and do the decryption in software.
572 */
573
574 /* mark the key as invalid. */
575 key->hw_key_idx = 0xff;
576 goto out_unlock;
577 }
578
579 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
580 } else {
581 slot = key->hw_key_idx;
582
583 if (slot == 0xff) {
584 /* This key was not uploaded into the rx key cache. */
585
586 goto out_unlock;
587 }
588
589 bitmap_release_region(priv->used_rxkeys, slot, 0);
590 algo = 0;
591 }
592
593 if (sta)
594 addr = sta->addr;
595
596 ret = p54_upload_key(priv, algo, slot, key->keyidx,
597 key->keylen, addr, key->key);
598 if (ret) {
599 bitmap_release_region(priv->used_rxkeys, slot, 0);
600 ret = -EOPNOTSUPP;
601 goto out_unlock;
602 }
603
604 key->hw_key_idx = slot;
605
606 out_unlock:
607 mutex_unlock(&priv->conf_mutex);
608 return ret;
609 }
610
p54_get_survey(struct ieee80211_hw * dev,int idx,struct survey_info * survey)611 static int p54_get_survey(struct ieee80211_hw *dev, int idx,
612 struct survey_info *survey)
613 {
614 struct p54_common *priv = dev->priv;
615 struct ieee80211_channel *chan;
616 int err, tries;
617 bool in_use = false;
618
619 if (idx >= priv->chan_num)
620 return -ENOENT;
621
622 #define MAX_TRIES 1
623 for (tries = 0; tries < MAX_TRIES; tries++) {
624 chan = priv->curchan;
625 if (chan && chan->hw_value == idx) {
626 mutex_lock(&priv->conf_mutex);
627 err = p54_wait_for_stats(dev);
628 mutex_unlock(&priv->conf_mutex);
629 if (err)
630 return err;
631
632 in_use = true;
633 }
634
635 memcpy(survey, &priv->survey[idx], sizeof(*survey));
636
637 if (in_use) {
638 /* test if the reported statistics are valid. */
639 if (survey->time != 0) {
640 survey->filled |= SURVEY_INFO_IN_USE;
641 } else {
642 /*
643 * hw/fw has not accumulated enough sample sets.
644 * Wait for 100ms, this ought to be enough to
645 * to get at least one non-null set of channel
646 * usage statistics.
647 */
648 msleep(100);
649 continue;
650 }
651 }
652 return 0;
653 }
654 return -ETIMEDOUT;
655 #undef MAX_TRIES
656 }
657
p54_flush_count(struct p54_common * priv)658 static unsigned int p54_flush_count(struct p54_common *priv)
659 {
660 unsigned int total = 0, i;
661
662 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
663
664 /*
665 * Because the firmware has the sole control over any frames
666 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
667 * don't really count as pending or active.
668 */
669 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
670 total += priv->tx_stats[i].len;
671 return total;
672 }
673
p54_flush(struct ieee80211_hw * dev,struct ieee80211_vif * vif,u32 queues,bool drop)674 static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
675 u32 queues, bool drop)
676 {
677 struct p54_common *priv = dev->priv;
678 unsigned int total, i;
679
680 /*
681 * Currently, it wouldn't really matter if we wait for one second
682 * or 15 minutes. But once someone gets around and completes the
683 * TODOs [ancel stuck frames / reset device] in p54_work, it will
684 * suddenly make sense to wait that long.
685 */
686 i = P54_STATISTICS_UPDATE * 2 / 20;
687
688 /*
689 * In this case no locking is required because as we speak the
690 * queues have already been stopped and no new frames can sneak
691 * up from behind.
692 */
693 while ((total = p54_flush_count(priv) && i--)) {
694 /* waste time */
695 msleep(20);
696 }
697
698 WARN(total, "tx flush timeout, unresponsive firmware");
699 }
700
p54_set_coverage_class(struct ieee80211_hw * dev,s16 coverage_class)701 static void p54_set_coverage_class(struct ieee80211_hw *dev,
702 s16 coverage_class)
703 {
704 struct p54_common *priv = dev->priv;
705
706 mutex_lock(&priv->conf_mutex);
707 /* support all coverage class values as in 802.11-2007 Table 7-27 */
708 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
709 p54_set_edcf(priv);
710 mutex_unlock(&priv->conf_mutex);
711 }
712
713 static const struct ieee80211_ops p54_ops = {
714 .tx = p54_tx_80211,
715 .start = p54_start,
716 .stop = p54_stop,
717 .add_interface = p54_add_interface,
718 .remove_interface = p54_remove_interface,
719 .set_tim = p54_set_tim,
720 .sta_notify = p54_sta_notify,
721 .sta_add = p54_sta_add_remove,
722 .sta_remove = p54_sta_add_remove,
723 .set_key = p54_set_key,
724 .config = p54_config,
725 .flush = p54_flush,
726 .bss_info_changed = p54_bss_info_changed,
727 .prepare_multicast = p54_prepare_multicast,
728 .configure_filter = p54_configure_filter,
729 .conf_tx = p54_conf_tx,
730 .get_stats = p54_get_stats,
731 .get_survey = p54_get_survey,
732 .set_coverage_class = p54_set_coverage_class,
733 };
734
p54_init_common(size_t priv_data_len)735 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
736 {
737 struct ieee80211_hw *dev;
738 struct p54_common *priv;
739
740 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
741 if (!dev)
742 return NULL;
743
744 priv = dev->priv;
745 priv->hw = dev;
746 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
747 priv->basic_rate_mask = 0x15f;
748 spin_lock_init(&priv->tx_stats_lock);
749 skb_queue_head_init(&priv->tx_queue);
750 skb_queue_head_init(&priv->tx_pending);
751 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
752 IEEE80211_HW_SIGNAL_DBM |
753 IEEE80211_HW_SUPPORTS_PS |
754 IEEE80211_HW_PS_NULLFUNC_STACK |
755 IEEE80211_HW_MFP_CAPABLE |
756 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
757
758 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
759 BIT(NL80211_IFTYPE_ADHOC) |
760 BIT(NL80211_IFTYPE_AP) |
761 BIT(NL80211_IFTYPE_MESH_POINT);
762
763 priv->beacon_req_id = cpu_to_le32(0);
764 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
765 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
766 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
767 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
768 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
769 dev->queues = 1;
770 priv->noise = -94;
771 /*
772 * We support at most 8 tries no matter which rate they're at,
773 * we cannot support max_rates * max_rate_tries as we set it
774 * here, but setting it correctly to 4/2 or so would limit us
775 * artificially if the RC algorithm wants just two rates, so
776 * let's say 4/7, we'll redistribute it at TX time, see the
777 * comments there.
778 */
779 dev->max_rates = 4;
780 dev->max_rate_tries = 7;
781 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
782 sizeof(struct p54_tx_data);
783
784 /*
785 * For now, disable PS by default because it affects
786 * link stability significantly.
787 */
788 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
789
790 mutex_init(&priv->conf_mutex);
791 mutex_init(&priv->eeprom_mutex);
792 init_completion(&priv->stat_comp);
793 init_completion(&priv->eeprom_comp);
794 init_completion(&priv->beacon_comp);
795 INIT_DELAYED_WORK(&priv->work, p54_work);
796
797 eth_broadcast_addr(priv->mc_maclist[0]);
798 priv->curchan = NULL;
799 p54_reset_stats(priv);
800 return dev;
801 }
802 EXPORT_SYMBOL_GPL(p54_init_common);
803
p54_register_common(struct ieee80211_hw * dev,struct device * pdev)804 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
805 {
806 struct p54_common __maybe_unused *priv = dev->priv;
807 int err;
808
809 err = ieee80211_register_hw(dev);
810 if (err) {
811 dev_err(pdev, "Cannot register device (%d).\n", err);
812 return err;
813 }
814 priv->registered = true;
815
816 #ifdef CONFIG_P54_LEDS
817 err = p54_init_leds(priv);
818 if (err) {
819 p54_unregister_common(dev);
820 return err;
821 }
822 #endif /* CONFIG_P54_LEDS */
823
824 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
825 return 0;
826 }
827 EXPORT_SYMBOL_GPL(p54_register_common);
828
p54_free_common(struct ieee80211_hw * dev)829 void p54_free_common(struct ieee80211_hw *dev)
830 {
831 struct p54_common *priv = dev->priv;
832 unsigned int i;
833
834 for (i = 0; i < IEEE80211_NUM_BANDS; i++)
835 kfree(priv->band_table[i]);
836
837 kfree(priv->iq_autocal);
838 kfree(priv->output_limit);
839 kfree(priv->curve_data);
840 kfree(priv->rssi_db);
841 kfree(priv->used_rxkeys);
842 kfree(priv->survey);
843 priv->iq_autocal = NULL;
844 priv->output_limit = NULL;
845 priv->curve_data = NULL;
846 priv->rssi_db = NULL;
847 priv->used_rxkeys = NULL;
848 priv->survey = NULL;
849 ieee80211_free_hw(dev);
850 }
851 EXPORT_SYMBOL_GPL(p54_free_common);
852
p54_unregister_common(struct ieee80211_hw * dev)853 void p54_unregister_common(struct ieee80211_hw *dev)
854 {
855 struct p54_common *priv = dev->priv;
856
857 #ifdef CONFIG_P54_LEDS
858 p54_unregister_leds(priv);
859 #endif /* CONFIG_P54_LEDS */
860
861 if (priv->registered) {
862 priv->registered = false;
863 ieee80211_unregister_hw(dev);
864 }
865
866 mutex_destroy(&priv->conf_mutex);
867 mutex_destroy(&priv->eeprom_mutex);
868 }
869 EXPORT_SYMBOL_GPL(p54_unregister_common);
870