Commit | Line | Data |
---|---|---|
0ac0d6ce CL |
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 | ||
5a0e3ad6 | 19 | #include <linux/slab.h> |
0ac0d6ce CL |
20 | #include <linux/firmware.h> |
21 | #include <linux/etherdevice.h> | |
9d9779e7 | 22 | #include <linux/module.h> |
0ac0d6ce CL |
23 | |
24 | #include <net/mac80211.h> | |
25 | ||
26 | #include "p54.h" | |
27 | #include "lmac.h" | |
28 | ||
eb939922 | 29 | static bool modparam_nohwcrypt; |
0ac0d6ce CL |
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 | ||
17f6f054 JB |
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 | ||
0ac0d6ce CL |
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; | |
0ac0d6ce | 58 | |
17f6f054 | 59 | switch (notify_cmd) { |
0ac0d6ce CL |
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 | ||
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 | ||
e0f114e8 | 77 | u8 *p54_find_ie(struct sk_buff *skb, u8 ie) |
0ac0d6ce | 78 | { |
0ac0d6ce CL |
79 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
80 | u8 *pos, *end; | |
81 | ||
82 | if (skb->len <= sizeof(mgmt)) | |
e0f114e8 | 83 | return NULL; |
0ac0d6ce CL |
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) | |
e0f114e8 | 89 | return NULL; |
0ac0d6ce | 90 | |
e0f114e8 CL |
91 | if (pos[0] == ie) |
92 | return pos; | |
0ac0d6ce | 93 | |
e0f114e8 CL |
94 | pos += 2 + pos[1]; |
95 | } | |
96 | return NULL; | |
97 | } | |
0ac0d6ce | 98 | |
e0f114e8 CL |
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; | |
0ac0d6ce | 110 | |
e0f114e8 CL |
111 | tim = p54_find_ie(skb, WLAN_EID_TIM); |
112 | if (!tim) | |
113 | return 0; | |
0ac0d6ce | 114 | |
e0f114e8 CL |
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)); | |
0ac0d6ce | 134 | |
0ac0d6ce CL |
135 | return 0; |
136 | } | |
137 | ||
138 | static int p54_beacon_update(struct p54_common *priv, | |
139 | struct ieee80211_vif *vif) | |
140 | { | |
390fd9d6 | 141 | struct ieee80211_tx_control control = { }; |
0ac0d6ce | 142 | struct sk_buff *beacon; |
0ac0d6ce CL |
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 | ||
46df10ae CL |
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 | */ | |
390fd9d6 | 161 | p54_tx_80211(priv->hw, &control, beacon); |
0ac0d6ce CL |
162 | priv->tsf_high32 = 0; |
163 | priv->tsf_low32 = 0; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
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 | ||
93803b33 | 185 | eth_broadcast_addr(priv->bssid); |
0ac0d6ce CL |
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 | ||
42935eca | 193 | ieee80211_queue_delayed_work(dev, &priv->work, 0); |
0ac0d6ce CL |
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 | ||
203 | static void p54_stop(struct ieee80211_hw *dev) | |
204 | { | |
205 | struct p54_common *priv = dev->priv; | |
206 | int i; | |
207 | ||
0ac0d6ce CL |
208 | priv->mode = NL80211_IFTYPE_UNSPECIFIED; |
209 | priv->softled_state = 0; | |
0ac0d6ce | 210 | cancel_delayed_work_sync(&priv->work); |
0d78156e CL |
211 | mutex_lock(&priv->conf_mutex); |
212 | p54_set_leds(priv); | |
0ac0d6ce CL |
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 | ||
226 | static int p54_add_interface(struct ieee80211_hw *dev, | |
1ed32e4f | 227 | struct ieee80211_vif *vif) |
0ac0d6ce CL |
228 | { |
229 | struct p54_common *priv = dev->priv; | |
972a3136 | 230 | int err; |
0ac0d6ce | 231 | |
c1288b12 JB |
232 | vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER; |
233 | ||
0ac0d6ce CL |
234 | mutex_lock(&priv->conf_mutex); |
235 | if (priv->mode != NL80211_IFTYPE_MONITOR) { | |
236 | mutex_unlock(&priv->conf_mutex); | |
237 | return -EOPNOTSUPP; | |
238 | } | |
239 | ||
1ed32e4f | 240 | priv->vif = vif; |
0ac0d6ce | 241 | |
1ed32e4f | 242 | switch (vif->type) { |
0ac0d6ce CL |
243 | case NL80211_IFTYPE_STATION: |
244 | case NL80211_IFTYPE_ADHOC: | |
245 | case NL80211_IFTYPE_AP: | |
246 | case NL80211_IFTYPE_MESH_POINT: | |
1ed32e4f | 247 | priv->mode = vif->type; |
0ac0d6ce CL |
248 | break; |
249 | default: | |
250 | mutex_unlock(&priv->conf_mutex); | |
251 | return -EOPNOTSUPP; | |
252 | } | |
253 | ||
1ed32e4f | 254 | memcpy(priv->mac_addr, vif->addr, ETH_ALEN); |
972a3136 | 255 | err = p54_setup_mac(priv); |
0ac0d6ce | 256 | mutex_unlock(&priv->conf_mutex); |
972a3136 | 257 | return err; |
0ac0d6ce CL |
258 | } |
259 | ||
260 | static void p54_remove_interface(struct ieee80211_hw *dev, | |
1ed32e4f | 261 | struct ieee80211_vif *vif) |
0ac0d6ce CL |
262 | { |
263 | struct p54_common *priv = dev->priv; | |
264 | ||
265 | mutex_lock(&priv->conf_mutex); | |
266 | priv->vif = NULL; | |
46df10ae CL |
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) { | |
0ac0d6ce | 273 | p54_tx_cancel(priv, priv->beacon_req_id); |
46df10ae | 274 | wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ); |
0ac0d6ce CL |
275 | } |
276 | priv->mode = NL80211_IFTYPE_MONITOR; | |
93803b33 JP |
277 | eth_zero_addr(priv->mac_addr); |
278 | eth_zero_addr(priv->bssid); | |
0ac0d6ce CL |
279 | p54_setup_mac(priv); |
280 | mutex_unlock(&priv->conf_mutex); | |
281 | } | |
282 | ||
0d78156e CL |
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 | ||
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. */ | |
4ed20beb JB |
308 | info->time = 0; |
309 | info->time_busy = 0; | |
310 | info->time_tx = 0; | |
0d78156e CL |
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 | ||
0ac0d6ce CL |
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) { | |
0d78156e CL |
329 | struct ieee80211_channel *oldchan; |
330 | WARN_ON(p54_wait_for_stats(dev)); | |
331 | oldchan = priv->curchan; | |
332 | priv->curchan = NULL; | |
0ac0d6ce | 333 | ret = p54_scan(priv, P54_SCAN_EXIT, 0); |
0d78156e CL |
334 | if (ret) { |
335 | priv->curchan = oldchan; | |
0ac0d6ce | 336 | goto out; |
0d78156e CL |
337 | } |
338 | /* | |
339 | * TODO: Use the LM_SCAN_TRAP to determine the current | |
340 | * operating channel. | |
341 | */ | |
675a0b04 | 342 | priv->curchan = priv->hw->conf.chandef.chan; |
0d78156e CL |
343 | p54_reset_stats(priv); |
344 | WARN_ON(p54_fetch_statistics(priv)); | |
0ac0d6ce CL |
345 | } |
346 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
0d78156e | 347 | WARN_ON(p54_wait_for_stats(dev)); |
0ac0d6ce CL |
348 | ret = p54_set_ps(priv); |
349 | if (ret) | |
350 | goto out; | |
0d78156e | 351 | WARN_ON(p54_wait_for_stats(dev)); |
0ac0d6ce | 352 | } |
6208f8b2 | 353 | if (changed & IEEE80211_CONF_CHANGE_IDLE) { |
0d78156e | 354 | WARN_ON(p54_wait_for_stats(dev)); |
6208f8b2 CL |
355 | ret = p54_setup_mac(priv); |
356 | if (ret) | |
357 | goto out; | |
0d78156e | 358 | WARN_ON(p54_wait_for_stats(dev)); |
6208f8b2 | 359 | } |
0ac0d6ce CL |
360 | |
361 | out: | |
362 | mutex_unlock(&priv->conf_mutex); | |
363 | return ret; | |
364 | } | |
365 | ||
be8d98ea CL |
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 | ||
0ac0d6ce CL |
391 | static void p54_configure_filter(struct ieee80211_hw *dev, |
392 | unsigned int changed_flags, | |
393 | unsigned int *total_flags, | |
3ac64bee | 394 | u64 multicast) |
0ac0d6ce CL |
395 | { |
396 | struct p54_common *priv = dev->priv; | |
397 | ||
df140465 | 398 | *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS; |
0ac0d6ce CL |
399 | |
400 | priv->filter_flags = *total_flags; | |
401 | ||
df140465 | 402 | if (changed_flags & FIF_OTHER_BSS) |
0ac0d6ce | 403 | p54_setup_mac(priv); |
be8d98ea CL |
404 | |
405 | if (changed_flags & FIF_ALLMULTI || multicast) | |
406 | p54_set_groupfilter(priv); | |
0ac0d6ce CL |
407 | } |
408 | ||
8a3a3c85 EP |
409 | static int p54_conf_tx(struct ieee80211_hw *dev, |
410 | struct ieee80211_vif *vif, u16 queue, | |
0ac0d6ce CL |
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); | |
718126a7 | 417 | if (queue < dev->queues) { |
0ac0d6ce CL |
418 | P54_SET_QUEUE(priv->qos_params[queue], params->aifs, |
419 | params->cw_min, params->cw_max, params->txop); | |
420 | ret = p54_set_edcf(priv); | |
421 | } else | |
422 | ret = -EINVAL; | |
423 | mutex_unlock(&priv->conf_mutex); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | static void p54_work(struct work_struct *work) | |
428 | { | |
429 | struct p54_common *priv = container_of(work, struct p54_common, | |
430 | work.work); | |
431 | ||
432 | if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) | |
433 | return ; | |
434 | ||
435 | /* | |
436 | * TODO: walk through tx_queue and do the following tasks | |
437 | * 1. initiate bursts. | |
438 | * 2. cancel stuck frames / reset the device if necessary. | |
439 | */ | |
440 | ||
0d78156e CL |
441 | mutex_lock(&priv->conf_mutex); |
442 | WARN_ON_ONCE(p54_fetch_statistics(priv)); | |
443 | mutex_unlock(&priv->conf_mutex); | |
0ac0d6ce CL |
444 | } |
445 | ||
446 | static int p54_get_stats(struct ieee80211_hw *dev, | |
447 | struct ieee80211_low_level_stats *stats) | |
448 | { | |
449 | struct p54_common *priv = dev->priv; | |
450 | ||
451 | memcpy(stats, &priv->stats, sizeof(*stats)); | |
452 | return 0; | |
453 | } | |
454 | ||
0ac0d6ce CL |
455 | static void p54_bss_info_changed(struct ieee80211_hw *dev, |
456 | struct ieee80211_vif *vif, | |
457 | struct ieee80211_bss_conf *info, | |
458 | u32 changed) | |
459 | { | |
460 | struct p54_common *priv = dev->priv; | |
461 | ||
462 | mutex_lock(&priv->conf_mutex); | |
463 | if (changed & BSS_CHANGED_BSSID) { | |
464 | memcpy(priv->bssid, info->bssid, ETH_ALEN); | |
465 | p54_setup_mac(priv); | |
466 | } | |
467 | ||
468 | if (changed & BSS_CHANGED_BEACON) { | |
469 | p54_scan(priv, P54_SCAN_EXIT, 0); | |
470 | p54_setup_mac(priv); | |
471 | p54_beacon_update(priv, vif); | |
472 | p54_set_edcf(priv); | |
473 | } | |
474 | ||
475 | if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) { | |
476 | priv->use_short_slot = info->use_short_slot; | |
477 | p54_set_edcf(priv); | |
478 | } | |
479 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
57fbcce3 | 480 | if (dev->conf.chandef.chan->band == NL80211_BAND_5GHZ) |
0ac0d6ce CL |
481 | priv->basic_rate_mask = (info->basic_rates << 4); |
482 | else | |
483 | priv->basic_rate_mask = info->basic_rates; | |
484 | p54_setup_mac(priv); | |
485 | if (priv->fw_var >= 0x500) | |
486 | p54_scan(priv, P54_SCAN_EXIT, 0); | |
487 | } | |
488 | if (changed & BSS_CHANGED_ASSOC) { | |
489 | if (info->assoc) { | |
490 | priv->aid = info->aid; | |
491 | priv->wakeup_timer = info->beacon_int * | |
492 | info->dtim_period * 5; | |
493 | p54_setup_mac(priv); | |
e0f114e8 CL |
494 | } else { |
495 | priv->wakeup_timer = 500; | |
496 | priv->aid = 0; | |
0ac0d6ce CL |
497 | } |
498 | } | |
499 | ||
500 | mutex_unlock(&priv->conf_mutex); | |
501 | } | |
502 | ||
503 | static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, | |
504 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, | |
505 | struct ieee80211_key_conf *key) | |
506 | { | |
507 | struct p54_common *priv = dev->priv; | |
508 | int slot, ret = 0; | |
509 | u8 algo = 0; | |
510 | u8 *addr = NULL; | |
511 | ||
512 | if (modparam_nohwcrypt) | |
513 | return -EOPNOTSUPP; | |
514 | ||
960334a7 CL |
515 | if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) { |
516 | /* | |
517 | * Unfortunately most/all firmwares are trying to decrypt | |
518 | * incoming management frames if a suitable key can be found. | |
519 | * However, in doing so the data in these frames gets | |
520 | * corrupted. So, we can't have firmware supported crypto | |
521 | * offload in this case. | |
522 | */ | |
523 | return -EOPNOTSUPP; | |
524 | } | |
525 | ||
0ac0d6ce CL |
526 | mutex_lock(&priv->conf_mutex); |
527 | if (cmd == SET_KEY) { | |
97359d12 JB |
528 | switch (key->cipher) { |
529 | case WLAN_CIPHER_SUITE_TKIP: | |
0ac0d6ce CL |
530 | if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | |
531 | BR_DESC_PRIV_CAP_TKIP))) { | |
532 | ret = -EOPNOTSUPP; | |
533 | goto out_unlock; | |
534 | } | |
535 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
536 | algo = P54_CRYPTO_TKIPMICHAEL; | |
537 | break; | |
97359d12 JB |
538 | case WLAN_CIPHER_SUITE_WEP40: |
539 | case WLAN_CIPHER_SUITE_WEP104: | |
0ac0d6ce CL |
540 | if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) { |
541 | ret = -EOPNOTSUPP; | |
542 | goto out_unlock; | |
543 | } | |
544 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
545 | algo = P54_CRYPTO_WEP; | |
546 | break; | |
97359d12 | 547 | case WLAN_CIPHER_SUITE_CCMP: |
0ac0d6ce CL |
548 | if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) { |
549 | ret = -EOPNOTSUPP; | |
550 | goto out_unlock; | |
551 | } | |
552 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
553 | algo = P54_CRYPTO_AESCCMP; | |
554 | break; | |
555 | default: | |
556 | ret = -EOPNOTSUPP; | |
557 | goto out_unlock; | |
558 | } | |
559 | slot = bitmap_find_free_region(priv->used_rxkeys, | |
560 | priv->rx_keycache_size, 0); | |
561 | ||
562 | if (slot < 0) { | |
563 | /* | |
25985edc | 564 | * The device supports the chosen algorithm, but the |
0ac0d6ce CL |
565 | * firmware does not provide enough key slots to store |
566 | * all of them. | |
567 | * But encryption offload for outgoing frames is always | |
568 | * possible, so we just pretend that the upload was | |
569 | * successful and do the decryption in software. | |
570 | */ | |
571 | ||
572 | /* mark the key as invalid. */ | |
573 | key->hw_key_idx = 0xff; | |
574 | goto out_unlock; | |
575 | } | |
db12847c IY |
576 | |
577 | key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM; | |
0ac0d6ce CL |
578 | } else { |
579 | slot = key->hw_key_idx; | |
580 | ||
581 | if (slot == 0xff) { | |
582 | /* This key was not uploaded into the rx key cache. */ | |
583 | ||
584 | goto out_unlock; | |
585 | } | |
586 | ||
587 | bitmap_release_region(priv->used_rxkeys, slot, 0); | |
588 | algo = 0; | |
589 | } | |
590 | ||
591 | if (sta) | |
592 | addr = sta->addr; | |
593 | ||
594 | ret = p54_upload_key(priv, algo, slot, key->keyidx, | |
595 | key->keylen, addr, key->key); | |
596 | if (ret) { | |
597 | bitmap_release_region(priv->used_rxkeys, slot, 0); | |
598 | ret = -EOPNOTSUPP; | |
599 | goto out_unlock; | |
600 | } | |
601 | ||
602 | key->hw_key_idx = slot; | |
603 | ||
604 | out_unlock: | |
605 | mutex_unlock(&priv->conf_mutex); | |
606 | return ret; | |
607 | } | |
608 | ||
1b2fb7dc JL |
609 | static int p54_get_survey(struct ieee80211_hw *dev, int idx, |
610 | struct survey_info *survey) | |
611 | { | |
612 | struct p54_common *priv = dev->priv; | |
0d78156e CL |
613 | struct ieee80211_channel *chan; |
614 | int err, tries; | |
615 | bool in_use = false; | |
1b2fb7dc | 616 | |
0d78156e | 617 | if (idx >= priv->chan_num) |
1b2fb7dc JL |
618 | return -ENOENT; |
619 | ||
0d78156e CL |
620 | #define MAX_TRIES 1 |
621 | for (tries = 0; tries < MAX_TRIES; tries++) { | |
622 | chan = priv->curchan; | |
623 | if (chan && chan->hw_value == idx) { | |
624 | mutex_lock(&priv->conf_mutex); | |
625 | err = p54_wait_for_stats(dev); | |
626 | mutex_unlock(&priv->conf_mutex); | |
627 | if (err) | |
628 | return err; | |
629 | ||
630 | in_use = true; | |
631 | } | |
1b2fb7dc | 632 | |
0d78156e CL |
633 | memcpy(survey, &priv->survey[idx], sizeof(*survey)); |
634 | ||
635 | if (in_use) { | |
636 | /* test if the reported statistics are valid. */ | |
4ed20beb | 637 | if (survey->time != 0) { |
0d78156e CL |
638 | survey->filled |= SURVEY_INFO_IN_USE; |
639 | } else { | |
640 | /* | |
641 | * hw/fw has not accumulated enough sample sets. | |
642 | * Wait for 100ms, this ought to be enough to | |
643 | * to get at least one non-null set of channel | |
644 | * usage statistics. | |
645 | */ | |
646 | msleep(100); | |
647 | continue; | |
648 | } | |
649 | } | |
650 | return 0; | |
651 | } | |
652 | return -ETIMEDOUT; | |
653 | #undef MAX_TRIES | |
1b2fb7dc JL |
654 | } |
655 | ||
0d4171e2 CL |
656 | static unsigned int p54_flush_count(struct p54_common *priv) |
657 | { | |
658 | unsigned int total = 0, i; | |
659 | ||
660 | BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats)); | |
661 | ||
662 | /* | |
663 | * Because the firmware has the sole control over any frames | |
664 | * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they | |
665 | * don't really count as pending or active. | |
666 | */ | |
667 | for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++) | |
668 | total += priv->tx_stats[i].len; | |
669 | return total; | |
670 | } | |
671 | ||
77be2c54 EG |
672 | static void p54_flush(struct ieee80211_hw *dev, struct ieee80211_vif *vif, |
673 | u32 queues, bool drop) | |
0d4171e2 CL |
674 | { |
675 | struct p54_common *priv = dev->priv; | |
676 | unsigned int total, i; | |
677 | ||
678 | /* | |
679 | * Currently, it wouldn't really matter if we wait for one second | |
680 | * or 15 minutes. But once someone gets around and completes the | |
681 | * TODOs [ancel stuck frames / reset device] in p54_work, it will | |
682 | * suddenly make sense to wait that long. | |
683 | */ | |
684 | i = P54_STATISTICS_UPDATE * 2 / 20; | |
685 | ||
686 | /* | |
687 | * In this case no locking is required because as we speak the | |
688 | * queues have already been stopped and no new frames can sneak | |
689 | * up from behind. | |
690 | */ | |
691 | while ((total = p54_flush_count(priv) && i--)) { | |
692 | /* waste time */ | |
693 | msleep(20); | |
694 | } | |
695 | ||
696 | WARN(total, "tx flush timeout, unresponsive firmware"); | |
697 | } | |
698 | ||
a4bcaf55 LB |
699 | static void p54_set_coverage_class(struct ieee80211_hw *dev, |
700 | s16 coverage_class) | |
3083e83c CL |
701 | { |
702 | struct p54_common *priv = dev->priv; | |
703 | ||
704 | mutex_lock(&priv->conf_mutex); | |
705 | /* support all coverage class values as in 802.11-2007 Table 7-27 */ | |
706 | priv->coverage_class = clamp_t(u8, coverage_class, 0, 31); | |
707 | p54_set_edcf(priv); | |
708 | mutex_unlock(&priv->conf_mutex); | |
709 | } | |
710 | ||
0ac0d6ce CL |
711 | static const struct ieee80211_ops p54_ops = { |
712 | .tx = p54_tx_80211, | |
713 | .start = p54_start, | |
714 | .stop = p54_stop, | |
715 | .add_interface = p54_add_interface, | |
716 | .remove_interface = p54_remove_interface, | |
717 | .set_tim = p54_set_tim, | |
718 | .sta_notify = p54_sta_notify, | |
17f6f054 JB |
719 | .sta_add = p54_sta_add_remove, |
720 | .sta_remove = p54_sta_add_remove, | |
0ac0d6ce CL |
721 | .set_key = p54_set_key, |
722 | .config = p54_config, | |
0d4171e2 | 723 | .flush = p54_flush, |
0ac0d6ce | 724 | .bss_info_changed = p54_bss_info_changed, |
be8d98ea | 725 | .prepare_multicast = p54_prepare_multicast, |
0ac0d6ce CL |
726 | .configure_filter = p54_configure_filter, |
727 | .conf_tx = p54_conf_tx, | |
728 | .get_stats = p54_get_stats, | |
1b2fb7dc | 729 | .get_survey = p54_get_survey, |
3083e83c | 730 | .set_coverage_class = p54_set_coverage_class, |
0ac0d6ce CL |
731 | }; |
732 | ||
733 | struct ieee80211_hw *p54_init_common(size_t priv_data_len) | |
734 | { | |
735 | struct ieee80211_hw *dev; | |
736 | struct p54_common *priv; | |
737 | ||
738 | dev = ieee80211_alloc_hw(priv_data_len, &p54_ops); | |
739 | if (!dev) | |
740 | return NULL; | |
741 | ||
742 | priv = dev->priv; | |
743 | priv->hw = dev; | |
744 | priv->mode = NL80211_IFTYPE_UNSPECIFIED; | |
745 | priv->basic_rate_mask = 0x15f; | |
746 | spin_lock_init(&priv->tx_stats_lock); | |
747 | skb_queue_head_init(&priv->tx_queue); | |
748 | skb_queue_head_init(&priv->tx_pending); | |
30686bf7 JB |
749 | ieee80211_hw_set(dev, REPORTS_TX_ACK_STATUS); |
750 | ieee80211_hw_set(dev, MFP_CAPABLE); | |
751 | ieee80211_hw_set(dev, PS_NULLFUNC_STACK); | |
752 | ieee80211_hw_set(dev, SUPPORTS_PS); | |
753 | ieee80211_hw_set(dev, RX_INCLUDES_FCS); | |
754 | ieee80211_hw_set(dev, SIGNAL_DBM); | |
0ac0d6ce CL |
755 | |
756 | dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
757 | BIT(NL80211_IFTYPE_ADHOC) | | |
758 | BIT(NL80211_IFTYPE_AP) | | |
759 | BIT(NL80211_IFTYPE_MESH_POINT); | |
760 | ||
46df10ae | 761 | priv->beacon_req_id = cpu_to_le32(0); |
0ac0d6ce CL |
762 | priv->tx_stats[P54_QUEUE_BEACON].limit = 1; |
763 | priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1; | |
764 | priv->tx_stats[P54_QUEUE_MGMT].limit = 3; | |
765 | priv->tx_stats[P54_QUEUE_CAB].limit = 3; | |
766 | priv->tx_stats[P54_QUEUE_DATA].limit = 5; | |
767 | dev->queues = 1; | |
768 | priv->noise = -94; | |
769 | /* | |
770 | * We support at most 8 tries no matter which rate they're at, | |
771 | * we cannot support max_rates * max_rate_tries as we set it | |
772 | * here, but setting it correctly to 4/2 or so would limit us | |
773 | * artificially if the RC algorithm wants just two rates, so | |
774 | * let's say 4/7, we'll redistribute it at TX time, see the | |
775 | * comments there. | |
776 | */ | |
777 | dev->max_rates = 4; | |
778 | dev->max_rate_tries = 7; | |
779 | dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 + | |
780 | sizeof(struct p54_tx_data); | |
781 | ||
c46aaba7 CL |
782 | /* |
783 | * For now, disable PS by default because it affects | |
784 | * link stability significantly. | |
785 | */ | |
5be83de5 | 786 | dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; |
c46aaba7 | 787 | |
0ac0d6ce CL |
788 | mutex_init(&priv->conf_mutex); |
789 | mutex_init(&priv->eeprom_mutex); | |
0d78156e | 790 | init_completion(&priv->stat_comp); |
0ac0d6ce | 791 | init_completion(&priv->eeprom_comp); |
46df10ae | 792 | init_completion(&priv->beacon_comp); |
0ac0d6ce CL |
793 | INIT_DELAYED_WORK(&priv->work, p54_work); |
794 | ||
93803b33 | 795 | eth_broadcast_addr(priv->mc_maclist[0]); |
0d78156e CL |
796 | priv->curchan = NULL; |
797 | p54_reset_stats(priv); | |
0ac0d6ce CL |
798 | return dev; |
799 | } | |
800 | EXPORT_SYMBOL_GPL(p54_init_common); | |
801 | ||
802 | int p54_register_common(struct ieee80211_hw *dev, struct device *pdev) | |
803 | { | |
fe0b7c61 | 804 | struct p54_common __maybe_unused *priv = dev->priv; |
0ac0d6ce CL |
805 | int err; |
806 | ||
807 | err = ieee80211_register_hw(dev); | |
808 | if (err) { | |
809 | dev_err(pdev, "Cannot register device (%d).\n", err); | |
810 | return err; | |
811 | } | |
a9b9361d | 812 | priv->registered = true; |
0ac0d6ce CL |
813 | |
814 | #ifdef CONFIG_P54_LEDS | |
815 | err = p54_init_leds(priv); | |
a9b9361d CL |
816 | if (err) { |
817 | p54_unregister_common(dev); | |
0ac0d6ce | 818 | return err; |
a9b9361d | 819 | } |
0ac0d6ce CL |
820 | #endif /* CONFIG_P54_LEDS */ |
821 | ||
822 | dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy)); | |
823 | return 0; | |
824 | } | |
825 | EXPORT_SYMBOL_GPL(p54_register_common); | |
826 | ||
827 | void p54_free_common(struct ieee80211_hw *dev) | |
828 | { | |
829 | struct p54_common *priv = dev->priv; | |
1a9b6679 CL |
830 | unsigned int i; |
831 | ||
57fbcce3 | 832 | for (i = 0; i < NUM_NL80211_BANDS; i++) |
1a9b6679 | 833 | kfree(priv->band_table[i]); |
0ac0d6ce CL |
834 | |
835 | kfree(priv->iq_autocal); | |
836 | kfree(priv->output_limit); | |
837 | kfree(priv->curve_data); | |
7a047f4f | 838 | kfree(priv->rssi_db); |
0ac0d6ce | 839 | kfree(priv->used_rxkeys); |
0d78156e | 840 | kfree(priv->survey); |
0ac0d6ce CL |
841 | priv->iq_autocal = NULL; |
842 | priv->output_limit = NULL; | |
843 | priv->curve_data = NULL; | |
7a047f4f | 844 | priv->rssi_db = NULL; |
0ac0d6ce | 845 | priv->used_rxkeys = NULL; |
0d78156e | 846 | priv->survey = NULL; |
0ac0d6ce CL |
847 | ieee80211_free_hw(dev); |
848 | } | |
849 | EXPORT_SYMBOL_GPL(p54_free_common); | |
850 | ||
851 | void p54_unregister_common(struct ieee80211_hw *dev) | |
852 | { | |
853 | struct p54_common *priv = dev->priv; | |
854 | ||
855 | #ifdef CONFIG_P54_LEDS | |
856 | p54_unregister_leds(priv); | |
857 | #endif /* CONFIG_P54_LEDS */ | |
858 | ||
a9b9361d CL |
859 | if (priv->registered) { |
860 | priv->registered = false; | |
861 | ieee80211_unregister_hw(dev); | |
862 | } | |
863 | ||
0ac0d6ce CL |
864 | mutex_destroy(&priv->conf_mutex); |
865 | mutex_destroy(&priv->eeprom_mutex); | |
866 | } | |
867 | EXPORT_SYMBOL_GPL(p54_unregister_common); |