1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * mac80211 glue code for mac80211 Prism54 drivers
4 *
5 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
6 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 *
9 * Based on:
10 * - the islsm (softmac prism54) driver, which is:
11 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12 * - stlc45xx driver
13 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
14 */
15
16 #include <linux/slab.h>
17 #include <linux/firmware.h>
18 #include <linux/etherdevice.h>
19 #include <linux/module.h>
20
21 #include <net/mac80211.h>
22
23 #include "p54.h"
24 #include "lmac.h"
25
26 static bool modparam_nohwcrypt;
27 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
28 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
29 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
30 MODULE_DESCRIPTION("Softmac Prism54 common code");
31 MODULE_LICENSE("GPL");
32 MODULE_ALIAS("prism54common");
33
p54_sta_add_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)34 static int p54_sta_add_remove(struct ieee80211_hw *hw,
35 struct ieee80211_vif *vif,
36 struct ieee80211_sta *sta)
37 {
38 struct p54_common *priv = hw->priv;
39
40 /*
41 * Notify the firmware that we don't want or we don't
42 * need to buffer frames for this station anymore.
43 */
44
45 p54_sta_unlock(priv, sta->addr);
46
47 return 0;
48 }
49
p54_sta_notify(struct ieee80211_hw * dev,struct ieee80211_vif * vif,enum sta_notify_cmd notify_cmd,struct ieee80211_sta * sta)50 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
51 enum sta_notify_cmd notify_cmd,
52 struct ieee80211_sta *sta)
53 {
54 struct p54_common *priv = dev->priv;
55
56 switch (notify_cmd) {
57 case STA_NOTIFY_AWAKE:
58 /* update the firmware's filter table */
59 p54_sta_unlock(priv, sta->addr);
60 break;
61 default:
62 break;
63 }
64 }
65
p54_set_tim(struct ieee80211_hw * dev,struct ieee80211_sta * sta,bool set)66 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
67 bool set)
68 {
69 struct p54_common *priv = dev->priv;
70
71 return p54_update_beacon_tim(priv, sta->aid, set);
72 }
73
p54_find_ie(struct sk_buff * skb,u8 ie)74 u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
75 {
76 struct ieee80211_mgmt *mgmt = (void *)skb->data;
77 u8 *pos, *end;
78
79 if (skb->len <= sizeof(mgmt))
80 return NULL;
81
82 pos = (u8 *)mgmt->u.beacon.variable;
83 end = skb->data + skb->len;
84 while (pos < end) {
85 if (pos + 2 + pos[1] > end)
86 return NULL;
87
88 if (pos[0] == ie)
89 return pos;
90
91 pos += 2 + pos[1];
92 }
93 return NULL;
94 }
95
p54_beacon_format_ie_tim(struct sk_buff * skb)96 static int p54_beacon_format_ie_tim(struct sk_buff *skb)
97 {
98 /*
99 * the good excuse for this mess is ... the firmware.
100 * The dummy TIM MUST be at the end of the beacon frame,
101 * because it'll be overwritten!
102 */
103 u8 *tim;
104 u8 dtim_len;
105 u8 dtim_period;
106 u8 *next;
107
108 tim = p54_find_ie(skb, WLAN_EID_TIM);
109 if (!tim)
110 return 0;
111
112 dtim_len = tim[1];
113 dtim_period = tim[3];
114 next = tim + 2 + dtim_len;
115
116 if (dtim_len < 3)
117 return -EINVAL;
118
119 memmove(tim, next, skb_tail_pointer(skb) - next);
120 tim = skb_tail_pointer(skb) - (dtim_len + 2);
121
122 /* add the dummy at the end */
123 tim[0] = WLAN_EID_TIM;
124 tim[1] = 3;
125 tim[2] = 0;
126 tim[3] = dtim_period;
127 tim[4] = 0;
128
129 if (dtim_len > 3)
130 skb_trim(skb, skb->len - (dtim_len - 3));
131
132 return 0;
133 }
134
p54_beacon_update(struct p54_common * priv,struct ieee80211_vif * vif)135 static int p54_beacon_update(struct p54_common *priv,
136 struct ieee80211_vif *vif)
137 {
138 struct ieee80211_tx_control control = { };
139 struct sk_buff *beacon;
140 int ret;
141
142 beacon = ieee80211_beacon_get(priv->hw, vif, 0);
143 if (!beacon)
144 return -ENOMEM;
145 ret = p54_beacon_format_ie_tim(beacon);
146 if (ret) {
147 dev_kfree_skb_any(beacon);
148 return ret;
149 }
150
151 /*
152 * During operation, the firmware takes care of beaconing.
153 * The driver only needs to upload a new beacon template, once
154 * the template was changed by the stack or userspace.
155 *
156 * LMAC API 3.2.2 also specifies that the driver does not need
157 * to cancel the old beacon template by hand, instead the firmware
158 * will release the previous one through the feedback mechanism.
159 */
160 p54_tx_80211(priv->hw, &control, beacon);
161 priv->tsf_high32 = 0;
162 priv->tsf_low32 = 0;
163
164 return 0;
165 }
166
p54_start(struct ieee80211_hw * dev)167 static int p54_start(struct ieee80211_hw *dev)
168 {
169 struct p54_common *priv = dev->priv;
170 int err;
171
172 mutex_lock(&priv->conf_mutex);
173 err = priv->open(dev);
174 if (err)
175 goto out;
176 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
177 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
178 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
179 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
180 err = p54_set_edcf(priv);
181 if (err)
182 goto out;
183
184 eth_broadcast_addr(priv->bssid);
185 priv->mode = NL80211_IFTYPE_MONITOR;
186 err = p54_setup_mac(priv);
187 if (err) {
188 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
189 goto out;
190 }
191
192 ieee80211_queue_delayed_work(dev, &priv->work, 0);
193
194 priv->softled_state = 0;
195 err = p54_set_leds(priv);
196
197 out:
198 mutex_unlock(&priv->conf_mutex);
199 return err;
200 }
201
p54_stop(struct ieee80211_hw * dev,bool suspend)202 static void p54_stop(struct ieee80211_hw *dev, bool suspend)
203 {
204 struct p54_common *priv = dev->priv;
205 int i;
206
207 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
208 priv->softled_state = 0;
209 cancel_delayed_work_sync(&priv->work);
210 mutex_lock(&priv->conf_mutex);
211 p54_set_leds(priv);
212 priv->stop(dev);
213 skb_queue_purge(&priv->tx_pending);
214 skb_queue_purge(&priv->tx_queue);
215 for (i = 0; i < P54_QUEUE_NUM; i++) {
216 priv->tx_stats[i].count = 0;
217 priv->tx_stats[i].len = 0;
218 }
219
220 priv->beacon_req_id = cpu_to_le32(0);
221 priv->tsf_high32 = priv->tsf_low32 = 0;
222 mutex_unlock(&priv->conf_mutex);
223 }
224
p54_add_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)225 static int p54_add_interface(struct ieee80211_hw *dev,
226 struct ieee80211_vif *vif)
227 {
228 struct p54_common *priv = dev->priv;
229 int err;
230
231 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
232
233 mutex_lock(&priv->conf_mutex);
234 if (priv->mode != NL80211_IFTYPE_MONITOR) {
235 mutex_unlock(&priv->conf_mutex);
236 return -EOPNOTSUPP;
237 }
238
239 priv->vif = vif;
240
241 switch (vif->type) {
242 case NL80211_IFTYPE_STATION:
243 case NL80211_IFTYPE_ADHOC:
244 case NL80211_IFTYPE_AP:
245 case NL80211_IFTYPE_MESH_POINT:
246 priv->mode = vif->type;
247 break;
248 default:
249 mutex_unlock(&priv->conf_mutex);
250 return -EOPNOTSUPP;
251 }
252
253 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
254 err = p54_setup_mac(priv);
255 mutex_unlock(&priv->conf_mutex);
256 return err;
257 }
258
p54_remove_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)259 static void p54_remove_interface(struct ieee80211_hw *dev,
260 struct ieee80211_vif *vif)
261 {
262 struct p54_common *priv = dev->priv;
263
264 mutex_lock(&priv->conf_mutex);
265 priv->vif = NULL;
266
267 /*
268 * LMAC API 3.2.2 states that any active beacon template must be
269 * canceled by the driver before attempting a mode transition.
270 */
271 if (le32_to_cpu(priv->beacon_req_id) != 0) {
272 p54_tx_cancel(priv, priv->beacon_req_id);
273 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
274 }
275 priv->mode = NL80211_IFTYPE_MONITOR;
276 eth_zero_addr(priv->mac_addr);
277 eth_zero_addr(priv->bssid);
278 p54_setup_mac(priv);
279 mutex_unlock(&priv->conf_mutex);
280 }
281
p54_wait_for_stats(struct ieee80211_hw * dev)282 static int p54_wait_for_stats(struct ieee80211_hw *dev)
283 {
284 struct p54_common *priv = dev->priv;
285 int ret;
286
287 priv->update_stats = true;
288 ret = p54_fetch_statistics(priv);
289 if (ret)
290 return ret;
291
292 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
293 if (ret == 0)
294 return -ETIMEDOUT;
295
296 return 0;
297 }
298
p54_reset_stats(struct p54_common * priv)299 static void p54_reset_stats(struct p54_common *priv)
300 {
301 struct ieee80211_channel *chan = priv->curchan;
302
303 if (chan) {
304 struct survey_info *info = &priv->survey[chan->hw_value];
305
306 /* only reset channel statistics, don't touch .filled, etc. */
307 info->time = 0;
308 info->time_busy = 0;
309 info->time_tx = 0;
310 }
311
312 priv->update_stats = true;
313 priv->survey_raw.active = 0;
314 priv->survey_raw.cca = 0;
315 priv->survey_raw.tx = 0;
316 }
317
p54_config(struct ieee80211_hw * dev,int radio_idx,u32 changed)318 static int p54_config(struct ieee80211_hw *dev, int radio_idx, u32 changed)
319 {
320 int ret = 0;
321 struct p54_common *priv = dev->priv;
322 struct ieee80211_conf *conf = &dev->conf;
323
324 mutex_lock(&priv->conf_mutex);
325 if (changed & IEEE80211_CONF_CHANGE_POWER)
326 priv->output_power = conf->power_level << 2;
327 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
328 struct ieee80211_channel *oldchan;
329 WARN_ON(p54_wait_for_stats(dev));
330 oldchan = priv->curchan;
331 priv->curchan = NULL;
332 ret = p54_scan(priv, P54_SCAN_EXIT, 0);
333 if (ret) {
334 priv->curchan = oldchan;
335 goto out;
336 }
337 /*
338 * TODO: Use the LM_SCAN_TRAP to determine the current
339 * operating channel.
340 */
341 priv->curchan = priv->hw->conf.chandef.chan;
342 p54_reset_stats(priv);
343 WARN_ON(p54_fetch_statistics(priv));
344 }
345 if (changed & IEEE80211_CONF_CHANGE_PS) {
346 WARN_ON(p54_wait_for_stats(dev));
347 ret = p54_set_ps(priv);
348 if (ret)
349 goto out;
350 WARN_ON(p54_wait_for_stats(dev));
351 }
352 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
353 WARN_ON(p54_wait_for_stats(dev));
354 ret = p54_setup_mac(priv);
355 if (ret)
356 goto out;
357 WARN_ON(p54_wait_for_stats(dev));
358 }
359
360 out:
361 mutex_unlock(&priv->conf_mutex);
362 return ret;
363 }
364
p54_prepare_multicast(struct ieee80211_hw * dev,struct netdev_hw_addr_list * mc_list)365 static u64 p54_prepare_multicast(struct ieee80211_hw *dev,
366 struct netdev_hw_addr_list *mc_list)
367 {
368 struct p54_common *priv = dev->priv;
369 struct netdev_hw_addr *ha;
370 int i;
371
372 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) !=
373 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list));
374 /*
375 * The first entry is reserved for the global broadcast MAC.
376 * Otherwise the firmware will drop it and ARP will no longer work.
377 */
378 i = 1;
379 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i;
380 netdev_hw_addr_list_for_each(ha, mc_list) {
381 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN);
382 i++;
383 if (i >= ARRAY_SIZE(priv->mc_maclist))
384 break;
385 }
386
387 return 1; /* update */
388 }
389
p54_configure_filter(struct ieee80211_hw * dev,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)390 static void p54_configure_filter(struct ieee80211_hw *dev,
391 unsigned int changed_flags,
392 unsigned int *total_flags,
393 u64 multicast)
394 {
395 struct p54_common *priv = dev->priv;
396
397 *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS;
398
399 priv->filter_flags = *total_flags;
400
401 if (changed_flags & FIF_OTHER_BSS)
402 p54_setup_mac(priv);
403
404 if (changed_flags & FIF_ALLMULTI || multicast)
405 p54_set_groupfilter(priv);
406 }
407
p54_conf_tx(struct ieee80211_hw * dev,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)408 static int p54_conf_tx(struct ieee80211_hw *dev,
409 struct ieee80211_vif *vif,
410 unsigned int link_id, u16 queue,
411 const struct ieee80211_tx_queue_params *params)
412 {
413 struct p54_common *priv = dev->priv;
414 int ret;
415
416 mutex_lock(&priv->conf_mutex);
417 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
418 params->cw_min, params->cw_max, params->txop);
419 ret = p54_set_edcf(priv);
420 mutex_unlock(&priv->conf_mutex);
421 return ret;
422 }
423
p54_work(struct work_struct * work)424 static void p54_work(struct work_struct *work)
425 {
426 struct p54_common *priv = container_of(work, struct p54_common,
427 work.work);
428
429 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
430 return ;
431
432 /*
433 * TODO: walk through tx_queue and do the following tasks
434 * 1. initiate bursts.
435 * 2. cancel stuck frames / reset the device if necessary.
436 */
437
438 mutex_lock(&priv->conf_mutex);
439 WARN_ON_ONCE(p54_fetch_statistics(priv));
440 mutex_unlock(&priv->conf_mutex);
441 }
442
p54_get_stats(struct ieee80211_hw * dev,struct ieee80211_low_level_stats * stats)443 static int p54_get_stats(struct ieee80211_hw *dev,
444 struct ieee80211_low_level_stats *stats)
445 {
446 struct p54_common *priv = dev->priv;
447
448 memcpy(stats, &priv->stats, sizeof(*stats));
449 return 0;
450 }
451
p54_bss_info_changed(struct ieee80211_hw * dev,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u64 changed)452 static void p54_bss_info_changed(struct ieee80211_hw *dev,
453 struct ieee80211_vif *vif,
454 struct ieee80211_bss_conf *info,
455 u64 changed)
456 {
457 struct p54_common *priv = dev->priv;
458
459 mutex_lock(&priv->conf_mutex);
460 if (changed & BSS_CHANGED_BSSID) {
461 memcpy(priv->bssid, info->bssid, ETH_ALEN);
462 p54_setup_mac(priv);
463 }
464
465 if (changed & BSS_CHANGED_BEACON) {
466 p54_scan(priv, P54_SCAN_EXIT, 0);
467 p54_setup_mac(priv);
468 p54_beacon_update(priv, vif);
469 p54_set_edcf(priv);
470 }
471
472 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
473 priv->use_short_slot = info->use_short_slot;
474 p54_set_edcf(priv);
475 }
476 if (changed & BSS_CHANGED_BASIC_RATES) {
477 if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ)
478 priv->basic_rate_mask = (info->basic_rates << 4);
479 else
480 priv->basic_rate_mask = info->basic_rates;
481 p54_setup_mac(priv);
482 if (priv->fw_var >= 0x500)
483 p54_scan(priv, P54_SCAN_EXIT, 0);
484 }
485 if (changed & BSS_CHANGED_ASSOC) {
486 if (vif->cfg.assoc) {
487 priv->aid = vif->cfg.aid;
488 priv->wakeup_timer = info->beacon_int *
489 info->dtim_period * 5;
490 p54_setup_mac(priv);
491 } else {
492 priv->wakeup_timer = 500;
493 priv->aid = 0;
494 }
495 }
496
497 mutex_unlock(&priv->conf_mutex);
498 }
499
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)500 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
501 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
502 struct ieee80211_key_conf *key)
503 {
504 struct p54_common *priv = dev->priv;
505 int slot, ret = 0;
506 u8 algo = 0;
507 u8 *addr = NULL;
508
509 if (modparam_nohwcrypt)
510 return -EOPNOTSUPP;
511
512 if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
513 /*
514 * Unfortunately most/all firmwares are trying to decrypt
515 * incoming management frames if a suitable key can be found.
516 * However, in doing so the data in these frames gets
517 * corrupted. So, we can't have firmware supported crypto
518 * offload in this case.
519 */
520 return -EOPNOTSUPP;
521 }
522
523 mutex_lock(&priv->conf_mutex);
524 if (cmd == SET_KEY) {
525 switch (key->cipher) {
526 case WLAN_CIPHER_SUITE_TKIP:
527 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
528 BR_DESC_PRIV_CAP_TKIP))) {
529 ret = -EOPNOTSUPP;
530 goto out_unlock;
531 }
532 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
533 algo = P54_CRYPTO_TKIPMICHAEL;
534 break;
535 case WLAN_CIPHER_SUITE_WEP40:
536 case WLAN_CIPHER_SUITE_WEP104:
537 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
538 ret = -EOPNOTSUPP;
539 goto out_unlock;
540 }
541 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
542 algo = P54_CRYPTO_WEP;
543 break;
544 case WLAN_CIPHER_SUITE_CCMP:
545 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
546 ret = -EOPNOTSUPP;
547 goto out_unlock;
548 }
549 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
550 algo = P54_CRYPTO_AESCCMP;
551 break;
552 default:
553 ret = -EOPNOTSUPP;
554 goto out_unlock;
555 }
556 slot = bitmap_find_free_region(priv->used_rxkeys,
557 priv->rx_keycache_size, 0);
558
559 if (slot < 0) {
560 /*
561 * The device supports the chosen algorithm, but the
562 * firmware does not provide enough key slots to store
563 * all of them.
564 * But encryption offload for outgoing frames is always
565 * possible, so we just pretend that the upload was
566 * successful and do the decryption in software.
567 */
568
569 /* mark the key as invalid. */
570 key->hw_key_idx = 0xff;
571 goto out_unlock;
572 }
573
574 key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
575 } else {
576 slot = key->hw_key_idx;
577
578 if (slot == 0xff) {
579 /* This key was not uploaded into the rx key cache. */
580
581 goto out_unlock;
582 }
583
584 bitmap_release_region(priv->used_rxkeys, slot, 0);
585 algo = 0;
586 }
587
588 if (sta)
589 addr = sta->addr;
590
591 ret = p54_upload_key(priv, algo, slot, key->keyidx,
592 key->keylen, addr, key->key);
593 if (ret) {
594 bitmap_release_region(priv->used_rxkeys, slot, 0);
595 ret = -EOPNOTSUPP;
596 goto out_unlock;
597 }
598
599 key->hw_key_idx = slot;
600
601 out_unlock:
602 mutex_unlock(&priv->conf_mutex);
603 return ret;
604 }
605
p54_get_survey(struct ieee80211_hw * dev,int idx,struct survey_info * survey)606 static int p54_get_survey(struct ieee80211_hw *dev, int idx,
607 struct survey_info *survey)
608 {
609 struct p54_common *priv = dev->priv;
610 struct ieee80211_channel *chan;
611 int err, tries;
612 bool in_use = false;
613
614 if (idx >= priv->chan_num)
615 return -ENOENT;
616
617 #define MAX_TRIES 1
618 for (tries = 0; tries < MAX_TRIES; tries++) {
619 chan = priv->curchan;
620 if (chan && chan->hw_value == idx) {
621 mutex_lock(&priv->conf_mutex);
622 err = p54_wait_for_stats(dev);
623 mutex_unlock(&priv->conf_mutex);
624 if (err)
625 return err;
626
627 in_use = true;
628 }
629
630 memcpy(survey, &priv->survey[idx], sizeof(*survey));
631
632 if (in_use) {
633 /* test if the reported statistics are valid. */
634 if (survey->time != 0) {
635 survey->filled |= SURVEY_INFO_IN_USE;
636 } else {
637 /*
638 * hw/fw has not accumulated enough sample sets.
639 * Wait for 100ms, this ought to be enough to
640 * get at least one non-null set of channel
641 * usage statistics.
642 */
643 msleep(100);
644 continue;
645 }
646 }
647 return 0;
648 }
649 return -ETIMEDOUT;
650 #undef MAX_TRIES
651 }
652
p54_flush_count(struct p54_common * priv)653 static unsigned int p54_flush_count(struct p54_common *priv)
654 {
655 unsigned int total = 0, i;
656
657 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
658
659 /*
660 * Because the firmware has the sole control over any frames
661 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
662 * don't really count as pending or active.
663 */
664 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
665 total += priv->tx_stats[i].len;
666 return total;
667 }
668
p54_flush(struct ieee80211_hw * dev,struct ieee80211_vif * vif,u32 queues,bool drop)669 static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
670 u32 queues, bool drop)
671 {
672 struct p54_common *priv = dev->priv;
673 unsigned int total, i;
674
675 /*
676 * Currently, it wouldn't really matter if we wait for one second
677 * or 15 minutes. But once someone gets around and completes the
678 * TODOs [ancel stuck frames / reset device] in p54_work, it will
679 * suddenly make sense to wait that long.
680 */
681 i = P54_STATISTICS_UPDATE * 2 / 20;
682
683 /*
684 * In this case no locking is required because as we speak the
685 * queues have already been stopped and no new frames can sneak
686 * up from behind.
687 */
688 while ((total = p54_flush_count(priv)) && i--) {
689 /* waste time */
690 msleep(20);
691 }
692
693 WARN(total, "tx flush timeout, unresponsive firmware");
694 }
695
p54_set_coverage_class(struct ieee80211_hw * dev,int radio_idx,s16 coverage_class)696 static void p54_set_coverage_class(struct ieee80211_hw *dev,
697 int radio_idx,
698 s16 coverage_class)
699 {
700 struct p54_common *priv = dev->priv;
701
702 mutex_lock(&priv->conf_mutex);
703 /* support all coverage class values as in 802.11-2007 Table 7-27 */
704 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31);
705 p54_set_edcf(priv);
706 mutex_unlock(&priv->conf_mutex);
707 }
708
709 static const struct ieee80211_ops p54_ops = {
710 .add_chanctx = ieee80211_emulate_add_chanctx,
711 .remove_chanctx = ieee80211_emulate_remove_chanctx,
712 .change_chanctx = ieee80211_emulate_change_chanctx,
713 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
714 .tx = p54_tx_80211,
715 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
716 .start = p54_start,
717 .stop = p54_stop,
718 .add_interface = p54_add_interface,
719 .remove_interface = p54_remove_interface,
720 .set_tim = p54_set_tim,
721 .sta_notify = p54_sta_notify,
722 .sta_add = p54_sta_add_remove,
723 .sta_remove = p54_sta_add_remove,
724 .set_key = p54_set_key,
725 .config = p54_config,
726 .flush = p54_flush,
727 .bss_info_changed = p54_bss_info_changed,
728 .prepare_multicast = p54_prepare_multicast,
729 .configure_filter = p54_configure_filter,
730 .conf_tx = p54_conf_tx,
731 .get_stats = p54_get_stats,
732 .get_survey = p54_get_survey,
733 .set_coverage_class = p54_set_coverage_class,
734 };
735
p54_init_common(size_t priv_data_len)736 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
737 {
738 struct ieee80211_hw *dev;
739 struct p54_common *priv;
740
741 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
742 if (!dev)
743 return NULL;
744
745 priv = dev->priv;
746 priv->hw = dev;
747 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
748 priv->basic_rate_mask = 0x15f;
749 spin_lock_init(&priv->tx_stats_lock);
750 skb_queue_head_init(&priv->tx_queue);
751 skb_queue_head_init(&priv->tx_pending);
752 ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS);
753 ieee80211_hw_set(dev, MFP_CAPABLE);
754 ieee80211_hw_set(dev, PS_NULLFUNC_STACK);
755 ieee80211_hw_set(dev, SUPPORTS_PS);
756 ieee80211_hw_set(dev, RX_INCLUDES_FCS);
757 ieee80211_hw_set(dev, SIGNAL_DBM);
758
759 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
760 BIT(NL80211_IFTYPE_ADHOC) |
761 BIT(NL80211_IFTYPE_AP) |
762 BIT(NL80211_IFTYPE_MESH_POINT);
763
764 priv->beacon_req_id = cpu_to_le32(0);
765 priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
766 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
767 priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
768 priv->tx_stats[P54_QUEUE_CAB].limit = 3;
769 priv->tx_stats[P54_QUEUE_DATA].limit = 5;
770 dev->queues = 1;
771 priv->noise = -94;
772 /*
773 * We support at most 8 tries no matter which rate they're at,
774 * we cannot support max_rates * max_rate_tries as we set it
775 * here, but setting it correctly to 4/2 or so would limit us
776 * artificially if the RC algorithm wants just two rates, so
777 * let's say 4/7, we'll redistribute it at TX time, see the
778 * comments there.
779 */
780 dev->max_rates = 4;
781 dev->max_rate_tries = 7;
782 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
783 sizeof(struct p54_tx_data);
784
785 /*
786 * For now, disable PS by default because it affects
787 * link stability significantly.
788 */
789 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
790
791 mutex_init(&priv->conf_mutex);
792 mutex_init(&priv->eeprom_mutex);
793 init_completion(&priv->stat_comp);
794 init_completion(&priv->eeprom_comp);
795 init_completion(&priv->beacon_comp);
796 INIT_DELAYED_WORK(&priv->work, p54_work);
797
798 eth_broadcast_addr(priv->mc_maclist[0]);
799 priv->curchan = NULL;
800 p54_reset_stats(priv);
801 return dev;
802 }
803 EXPORT_SYMBOL_GPL(p54_init_common);
804
p54_register_common(struct ieee80211_hw * dev,struct device * pdev)805 int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
806 {
807 struct p54_common __maybe_unused *priv = dev->priv;
808 int err;
809
810 err = ieee80211_register_hw(dev);
811 if (err) {
812 dev_err(pdev, "Cannot register device (%d).\n", err);
813 return err;
814 }
815 priv->registered = true;
816
817 #ifdef CONFIG_P54_LEDS
818 err = p54_init_leds(priv);
819 if (err) {
820 p54_unregister_common(dev);
821 return err;
822 }
823 #endif /* CONFIG_P54_LEDS */
824
825 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
826 return 0;
827 }
828 EXPORT_SYMBOL_GPL(p54_register_common);
829
p54_free_common(struct ieee80211_hw * dev)830 void p54_free_common(struct ieee80211_hw *dev)
831 {
832 struct p54_common *priv = dev->priv;
833 unsigned int i;
834
835 for (i = 0; i < NUM_NL80211_BANDS; i++)
836 kfree(priv->band_table[i]);
837
838 kfree(priv->iq_autocal);
839 kfree(priv->output_limit);
840 kfree(priv->curve_data);
841 kfree(priv->rssi_db);
842 bitmap_free(priv->used_rxkeys);
843 kfree(priv->survey);
844 priv->iq_autocal = NULL;
845 priv->output_limit = NULL;
846 priv->curve_data = NULL;
847 priv->rssi_db = NULL;
848 priv->used_rxkeys = NULL;
849 priv->survey = NULL;
850 ieee80211_free_hw(dev);
851 }
852 EXPORT_SYMBOL_GPL(p54_free_common);
853
p54_unregister_common(struct ieee80211_hw * dev)854 void p54_unregister_common(struct ieee80211_hw *dev)
855 {
856 struct p54_common *priv = dev->priv;
857
858 if (priv->registered) {
859 priv->registered = false;
860 #ifdef CONFIG_P54_LEDS
861 p54_unregister_leds(priv);
862 #endif /* CONFIG_P54_LEDS */
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