1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
4 | <http://rt2x00.serialmonkey.com> |
5 | |
6 | */ |
7 | |
8 | /* |
9 | Module: rt2x00mac |
10 | Abstract: rt2x00 generic mac80211 routines. |
11 | */ |
12 | |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | |
16 | #include "rt2x00.h" |
17 | #include "rt2x00lib.h" |
18 | |
19 | static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, |
20 | struct data_queue *queue, |
21 | struct sk_buff *frag_skb) |
22 | { |
23 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb: frag_skb); |
24 | struct ieee80211_tx_info *rts_info; |
25 | struct sk_buff *skb; |
26 | unsigned int data_length; |
27 | int retval = 0; |
28 | |
29 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
30 | data_length = sizeof(struct ieee80211_cts); |
31 | else |
32 | data_length = sizeof(struct ieee80211_rts); |
33 | |
34 | skb = dev_alloc_skb(length: data_length + rt2x00dev->hw->extra_tx_headroom); |
35 | if (unlikely(!skb)) { |
36 | rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n" ); |
37 | return -ENOMEM; |
38 | } |
39 | |
40 | skb_reserve(skb, len: rt2x00dev->hw->extra_tx_headroom); |
41 | skb_put(skb, len: data_length); |
42 | |
43 | /* |
44 | * Copy TX information over from original frame to |
45 | * RTS/CTS frame. Note that we set the no encryption flag |
46 | * since we don't want this frame to be encrypted. |
47 | * RTS frames should be acked, while CTS-to-self frames |
48 | * should not. The ready for TX flag is cleared to prevent |
49 | * it being automatically send when the descriptor is |
50 | * written to the hardware. |
51 | */ |
52 | memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); |
53 | rts_info = IEEE80211_SKB_CB(skb); |
54 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; |
55 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; |
56 | |
57 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
58 | rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; |
59 | else |
60 | rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; |
61 | |
62 | /* Disable hardware encryption */ |
63 | rts_info->control.hw_key = NULL; |
64 | |
65 | /* |
66 | * RTS/CTS frame should use the length of the frame plus any |
67 | * encryption overhead that will be added by the hardware. |
68 | */ |
69 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); |
70 | |
71 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
72 | ieee80211_ctstoself_get(hw: rt2x00dev->hw, vif: tx_info->control.vif, |
73 | frame: frag_skb->data, frame_len: data_length, frame_txctl: tx_info, |
74 | cts: (struct ieee80211_cts *)(skb->data)); |
75 | else |
76 | ieee80211_rts_get(hw: rt2x00dev->hw, vif: tx_info->control.vif, |
77 | frame: frag_skb->data, frame_len: data_length, frame_txctl: tx_info, |
78 | rts: (struct ieee80211_rts *)(skb->data)); |
79 | |
80 | retval = rt2x00queue_write_tx_frame(queue, skb, NULL, local: true); |
81 | if (retval) { |
82 | dev_kfree_skb_any(skb); |
83 | rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n" ); |
84 | } |
85 | |
86 | return retval; |
87 | } |
88 | |
89 | void rt2x00mac_tx(struct ieee80211_hw *hw, |
90 | struct ieee80211_tx_control *control, |
91 | struct sk_buff *skb) |
92 | { |
93 | struct rt2x00_dev *rt2x00dev = hw->priv; |
94 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
95 | enum data_queue_qid qid = skb_get_queue_mapping(skb); |
96 | struct data_queue *queue = NULL; |
97 | |
98 | /* |
99 | * Mac80211 might be calling this function while we are trying |
100 | * to remove the device or perhaps suspending it. |
101 | * Note that we can only stop the TX queues inside the TX path |
102 | * due to possible race conditions in mac80211. |
103 | */ |
104 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
105 | goto exit_free_skb; |
106 | |
107 | /* |
108 | * Use the ATIM queue if appropriate and present. |
109 | */ |
110 | if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
111 | rt2x00_has_cap_flag(rt2x00dev, cap_flag: REQUIRE_ATIM_QUEUE)) |
112 | qid = QID_ATIM; |
113 | |
114 | queue = rt2x00queue_get_tx_queue(rt2x00dev, queue: qid); |
115 | if (unlikely(!queue)) { |
116 | rt2x00_err(rt2x00dev, |
117 | "Attempt to send packet over invalid queue %d\n" |
118 | "Please file bug report to %s\n" , qid, DRV_PROJECT); |
119 | goto exit_free_skb; |
120 | } |
121 | |
122 | /* |
123 | * If CTS/RTS is required. create and queue that frame first. |
124 | * Make sure we have at least enough entries available to send |
125 | * this CTS/RTS frame as well as the data frame. |
126 | * Note that when the driver has set the set_rts_threshold() |
127 | * callback function it doesn't need software generation of |
128 | * either RTS or CTS-to-self frame and handles everything |
129 | * inside the hardware. |
130 | */ |
131 | if (!rt2x00dev->ops->hw->set_rts_threshold && |
132 | (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | |
133 | IEEE80211_TX_RC_USE_CTS_PROTECT))) { |
134 | if (rt2x00queue_available(queue) <= 1) { |
135 | /* |
136 | * Recheck for full queue under lock to avoid race |
137 | * conditions with rt2x00lib_txdone(). |
138 | */ |
139 | spin_lock(lock: &queue->tx_lock); |
140 | if (rt2x00queue_threshold(queue)) |
141 | rt2x00queue_pause_queue(queue); |
142 | spin_unlock(lock: &queue->tx_lock); |
143 | |
144 | goto exit_free_skb; |
145 | } |
146 | |
147 | if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, frag_skb: skb)) |
148 | goto exit_free_skb; |
149 | } |
150 | |
151 | if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) |
152 | goto exit_free_skb; |
153 | |
154 | return; |
155 | |
156 | exit_free_skb: |
157 | ieee80211_free_txskb(hw, skb); |
158 | } |
159 | EXPORT_SYMBOL_GPL(rt2x00mac_tx); |
160 | |
161 | int rt2x00mac_start(struct ieee80211_hw *hw) |
162 | { |
163 | struct rt2x00_dev *rt2x00dev = hw->priv; |
164 | |
165 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
166 | return 0; |
167 | |
168 | if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) { |
169 | /* |
170 | * This is special case for ieee80211_restart_hw(), otherwise |
171 | * mac80211 never call start() two times in row without stop(); |
172 | */ |
173 | set_bit(nr: DEVICE_STATE_RESET, addr: &rt2x00dev->flags); |
174 | rt2x00dev->ops->lib->pre_reset_hw(rt2x00dev); |
175 | rt2x00lib_stop(rt2x00dev); |
176 | } |
177 | return rt2x00lib_start(rt2x00dev); |
178 | } |
179 | EXPORT_SYMBOL_GPL(rt2x00mac_start); |
180 | |
181 | void rt2x00mac_stop(struct ieee80211_hw *hw) |
182 | { |
183 | struct rt2x00_dev *rt2x00dev = hw->priv; |
184 | |
185 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
186 | return; |
187 | |
188 | rt2x00lib_stop(rt2x00dev); |
189 | } |
190 | EXPORT_SYMBOL_GPL(rt2x00mac_stop); |
191 | |
192 | void |
193 | rt2x00mac_reconfig_complete(struct ieee80211_hw *hw, |
194 | enum ieee80211_reconfig_type reconfig_type) |
195 | { |
196 | struct rt2x00_dev *rt2x00dev = hw->priv; |
197 | |
198 | if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART) |
199 | clear_bit(nr: DEVICE_STATE_RESET, addr: &rt2x00dev->flags); |
200 | } |
201 | EXPORT_SYMBOL_GPL(rt2x00mac_reconfig_complete); |
202 | |
203 | int rt2x00mac_add_interface(struct ieee80211_hw *hw, |
204 | struct ieee80211_vif *vif) |
205 | { |
206 | struct rt2x00_dev *rt2x00dev = hw->priv; |
207 | struct rt2x00_intf *intf = vif_to_intf(vif); |
208 | struct data_queue *queue = rt2x00dev->bcn; |
209 | struct queue_entry *entry = NULL; |
210 | unsigned int i; |
211 | |
212 | /* |
213 | * Don't allow interfaces to be added |
214 | * the device has disappeared. |
215 | */ |
216 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
217 | !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
218 | return -ENODEV; |
219 | |
220 | /* |
221 | * Loop through all beacon queues to find a free |
222 | * entry. Since there are as much beacon entries |
223 | * as the maximum interfaces, this search shouldn't |
224 | * fail. |
225 | */ |
226 | for (i = 0; i < queue->limit; i++) { |
227 | entry = &queue->entries[i]; |
228 | if (!test_and_set_bit(nr: ENTRY_BCN_ASSIGNED, addr: &entry->flags)) |
229 | break; |
230 | } |
231 | |
232 | if (unlikely(i == queue->limit)) |
233 | return -ENOBUFS; |
234 | |
235 | /* |
236 | * We are now absolutely sure the interface can be created, |
237 | * increase interface count and start initialization. |
238 | */ |
239 | |
240 | if (vif->type == NL80211_IFTYPE_AP) |
241 | rt2x00dev->intf_ap_count++; |
242 | else |
243 | rt2x00dev->intf_sta_count++; |
244 | |
245 | mutex_init(&intf->beacon_skb_mutex); |
246 | intf->beacon = entry; |
247 | |
248 | /* |
249 | * The MAC address must be configured after the device |
250 | * has been initialized. Otherwise the device can reset |
251 | * the MAC registers. |
252 | * The BSSID address must only be configured in AP mode, |
253 | * however we should not send an empty BSSID address for |
254 | * STA interfaces at this time, since this can cause |
255 | * invalid behavior in the device. |
256 | */ |
257 | rt2x00lib_config_intf(rt2x00dev, intf, type: vif->type, |
258 | mac: vif->addr, NULL); |
259 | |
260 | /* |
261 | * Some filters depend on the current working mode. We can force |
262 | * an update during the next configure_filter() run by mac80211 by |
263 | * resetting the current packet_filter state. |
264 | */ |
265 | rt2x00dev->packet_filter = 0; |
266 | |
267 | return 0; |
268 | } |
269 | EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); |
270 | |
271 | void rt2x00mac_remove_interface(struct ieee80211_hw *hw, |
272 | struct ieee80211_vif *vif) |
273 | { |
274 | struct rt2x00_dev *rt2x00dev = hw->priv; |
275 | struct rt2x00_intf *intf = vif_to_intf(vif); |
276 | |
277 | /* |
278 | * Don't allow interfaces to be remove while |
279 | * either the device has disappeared or when |
280 | * no interface is present. |
281 | */ |
282 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
283 | (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || |
284 | (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) |
285 | return; |
286 | |
287 | if (vif->type == NL80211_IFTYPE_AP) |
288 | rt2x00dev->intf_ap_count--; |
289 | else |
290 | rt2x00dev->intf_sta_count--; |
291 | |
292 | /* |
293 | * Release beacon entry so it is available for |
294 | * new interfaces again. |
295 | */ |
296 | clear_bit(nr: ENTRY_BCN_ASSIGNED, addr: &intf->beacon->flags); |
297 | |
298 | /* |
299 | * Make sure the bssid and mac address registers |
300 | * are cleared to prevent false ACKing of frames. |
301 | */ |
302 | rt2x00lib_config_intf(rt2x00dev, intf, |
303 | type: NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); |
304 | } |
305 | EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); |
306 | |
307 | int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) |
308 | { |
309 | struct rt2x00_dev *rt2x00dev = hw->priv; |
310 | struct ieee80211_conf *conf = &hw->conf; |
311 | |
312 | /* |
313 | * mac80211 might be calling this function while we are trying |
314 | * to remove the device or perhaps suspending it. |
315 | */ |
316 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
317 | return 0; |
318 | |
319 | /* |
320 | * Some configuration parameters (e.g. channel and antenna values) can |
321 | * only be set when the radio is enabled, but do require the RX to |
322 | * be off. During this period we should keep link tuning enabled, |
323 | * if for any reason the link tuner must be reset, this will be |
324 | * handled by rt2x00lib_config(). |
325 | */ |
326 | rt2x00queue_stop_queue(queue: rt2x00dev->rx); |
327 | |
328 | /* Do not race with link tuner. */ |
329 | mutex_lock(&rt2x00dev->conf_mutex); |
330 | |
331 | /* |
332 | * When we've just turned on the radio, we want to reprogram |
333 | * everything to ensure a consistent state |
334 | */ |
335 | rt2x00lib_config(rt2x00dev, conf, changed_flags: changed); |
336 | |
337 | /* |
338 | * After the radio has been enabled we need to configure |
339 | * the antenna to the default settings. rt2x00lib_config_antenna() |
340 | * should determine if any action should be taken based on |
341 | * checking if diversity has been enabled or no antenna changes |
342 | * have been made since the last configuration change. |
343 | */ |
344 | rt2x00lib_config_antenna(rt2x00dev, ant: rt2x00dev->default_ant); |
345 | |
346 | mutex_unlock(lock: &rt2x00dev->conf_mutex); |
347 | |
348 | /* Turn RX back on */ |
349 | rt2x00queue_start_queue(queue: rt2x00dev->rx); |
350 | |
351 | return 0; |
352 | } |
353 | EXPORT_SYMBOL_GPL(rt2x00mac_config); |
354 | |
355 | void rt2x00mac_configure_filter(struct ieee80211_hw *hw, |
356 | unsigned int changed_flags, |
357 | unsigned int *total_flags, |
358 | u64 multicast) |
359 | { |
360 | struct rt2x00_dev *rt2x00dev = hw->priv; |
361 | |
362 | /* |
363 | * Mask off any flags we are going to ignore |
364 | * from the total_flags field. |
365 | */ |
366 | *total_flags &= |
367 | FIF_ALLMULTI | |
368 | FIF_FCSFAIL | |
369 | FIF_PLCPFAIL | |
370 | FIF_CONTROL | |
371 | FIF_PSPOLL | |
372 | FIF_OTHER_BSS; |
373 | |
374 | /* |
375 | * Apply some rules to the filters: |
376 | * - Some filters imply different filters to be set. |
377 | * - Some things we can't filter out at all. |
378 | * - Multicast filter seems to kill broadcast traffic so never use it. |
379 | */ |
380 | *total_flags |= FIF_ALLMULTI; |
381 | |
382 | /* |
383 | * If the device has a single filter for all control frames, |
384 | * FIF_CONTROL and FIF_PSPOLL flags imply each other. |
385 | * And if the device has more than one filter for control frames |
386 | * of different types, but has no a separate filter for PS Poll frames, |
387 | * FIF_CONTROL flag implies FIF_PSPOLL. |
388 | */ |
389 | if (!rt2x00_has_cap_control_filters(rt2x00dev)) { |
390 | if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) |
391 | *total_flags |= FIF_CONTROL | FIF_PSPOLL; |
392 | } |
393 | if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { |
394 | if (*total_flags & FIF_CONTROL) |
395 | *total_flags |= FIF_PSPOLL; |
396 | } |
397 | |
398 | rt2x00dev->packet_filter = *total_flags; |
399 | |
400 | rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); |
401 | } |
402 | EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); |
403 | |
404 | static void rt2x00mac_set_tim_iter(void *data, u8 *mac, |
405 | struct ieee80211_vif *vif) |
406 | { |
407 | struct rt2x00_intf *intf = vif_to_intf(vif); |
408 | |
409 | if (vif->type != NL80211_IFTYPE_AP && |
410 | vif->type != NL80211_IFTYPE_ADHOC && |
411 | vif->type != NL80211_IFTYPE_MESH_POINT) |
412 | return; |
413 | |
414 | set_bit(nr: DELAYED_UPDATE_BEACON, addr: &intf->delayed_flags); |
415 | } |
416 | |
417 | int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
418 | bool set) |
419 | { |
420 | struct rt2x00_dev *rt2x00dev = hw->priv; |
421 | |
422 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
423 | return 0; |
424 | |
425 | ieee80211_iterate_active_interfaces_atomic( |
426 | hw: rt2x00dev->hw, iter_flags: IEEE80211_IFACE_ITER_RESUME_ALL, |
427 | iterator: rt2x00mac_set_tim_iter, data: rt2x00dev); |
428 | |
429 | /* queue work to upodate the beacon template */ |
430 | ieee80211_queue_work(hw: rt2x00dev->hw, work: &rt2x00dev->intf_work); |
431 | return 0; |
432 | } |
433 | EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); |
434 | |
435 | #ifdef CONFIG_RT2X00_LIB_CRYPTO |
436 | static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) |
437 | { |
438 | if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) |
439 | memcpy(crypto->key, |
440 | &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], |
441 | sizeof(crypto->key)); |
442 | |
443 | if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) |
444 | memcpy(crypto->tx_mic, |
445 | &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], |
446 | sizeof(crypto->tx_mic)); |
447 | |
448 | if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) |
449 | memcpy(crypto->rx_mic, |
450 | &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], |
451 | sizeof(crypto->rx_mic)); |
452 | } |
453 | |
454 | int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
455 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
456 | struct ieee80211_key_conf *key) |
457 | { |
458 | struct rt2x00_dev *rt2x00dev = hw->priv; |
459 | int (*set_key) (struct rt2x00_dev *rt2x00dev, |
460 | struct rt2x00lib_crypto *crypto, |
461 | struct ieee80211_key_conf *key); |
462 | struct rt2x00lib_crypto crypto; |
463 | static const u8 bcast_addr[ETH_ALEN] = |
464 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; |
465 | struct rt2x00_sta *sta_priv = NULL; |
466 | |
467 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
468 | return 0; |
469 | |
470 | /* The hardware can't do MFP */ |
471 | if (!rt2x00_has_cap_hw_crypto(rt2x00dev) || (sta && sta->mfp)) |
472 | return -EOPNOTSUPP; |
473 | |
474 | /* |
475 | * To support IBSS RSN, don't program group keys in IBSS, the |
476 | * hardware will then not attempt to decrypt the frames. |
477 | */ |
478 | if (vif->type == NL80211_IFTYPE_ADHOC && |
479 | !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) |
480 | return -EOPNOTSUPP; |
481 | |
482 | if (key->keylen > 32) |
483 | return -ENOSPC; |
484 | |
485 | memset(&crypto, 0, sizeof(crypto)); |
486 | |
487 | crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); |
488 | crypto.cipher = rt2x00crypto_key_to_cipher(key); |
489 | if (crypto.cipher == CIPHER_NONE) |
490 | return -EOPNOTSUPP; |
491 | if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) |
492 | return -EOPNOTSUPP; |
493 | |
494 | crypto.cmd = cmd; |
495 | |
496 | if (sta) { |
497 | crypto.address = sta->addr; |
498 | sta_priv = sta_to_rt2x00_sta(sta); |
499 | crypto.wcid = sta_priv->wcid; |
500 | } else |
501 | crypto.address = bcast_addr; |
502 | |
503 | if (crypto.cipher == CIPHER_TKIP) |
504 | memcpy_tkip(crypto: &crypto, key: &key->key[0], key_len: key->keylen); |
505 | else |
506 | memcpy(crypto.key, &key->key[0], key->keylen); |
507 | /* |
508 | * Each BSS has a maximum of 4 shared keys. |
509 | * Shared key index values: |
510 | * 0) BSS0 key0 |
511 | * 1) BSS0 key1 |
512 | * ... |
513 | * 4) BSS1 key0 |
514 | * ... |
515 | * 8) BSS2 key0 |
516 | * ... |
517 | * Both pairwise as shared key indeces are determined by |
518 | * driver. This is required because the hardware requires |
519 | * keys to be assigned in correct order (When key 1 is |
520 | * provided but key 0 is not, then the key is not found |
521 | * by the hardware during RX). |
522 | */ |
523 | if (cmd == SET_KEY) |
524 | key->hw_key_idx = 0; |
525 | |
526 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) |
527 | set_key = rt2x00dev->ops->lib->config_pairwise_key; |
528 | else |
529 | set_key = rt2x00dev->ops->lib->config_shared_key; |
530 | |
531 | if (!set_key) |
532 | return -EOPNOTSUPP; |
533 | |
534 | return set_key(rt2x00dev, &crypto, key); |
535 | } |
536 | EXPORT_SYMBOL_GPL(rt2x00mac_set_key); |
537 | #endif /* CONFIG_RT2X00_LIB_CRYPTO */ |
538 | |
539 | void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, |
540 | struct ieee80211_vif *vif, |
541 | const u8 *mac_addr) |
542 | { |
543 | struct rt2x00_dev *rt2x00dev = hw->priv; |
544 | set_bit(nr: DEVICE_STATE_SCANNING, addr: &rt2x00dev->flags); |
545 | rt2x00link_stop_tuner(rt2x00dev); |
546 | } |
547 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); |
548 | |
549 | void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, |
550 | struct ieee80211_vif *vif) |
551 | { |
552 | struct rt2x00_dev *rt2x00dev = hw->priv; |
553 | clear_bit(nr: DEVICE_STATE_SCANNING, addr: &rt2x00dev->flags); |
554 | rt2x00link_start_tuner(rt2x00dev); |
555 | } |
556 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); |
557 | |
558 | int rt2x00mac_get_stats(struct ieee80211_hw *hw, |
559 | struct ieee80211_low_level_stats *stats) |
560 | { |
561 | struct rt2x00_dev *rt2x00dev = hw->priv; |
562 | |
563 | /* |
564 | * The dot11ACKFailureCount, dot11RTSFailureCount and |
565 | * dot11RTSSuccessCount are updated in interrupt time. |
566 | * dot11FCSErrorCount is updated in the link tuner. |
567 | */ |
568 | memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); |
569 | |
570 | return 0; |
571 | } |
572 | EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); |
573 | |
574 | void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, |
575 | struct ieee80211_vif *vif, |
576 | struct ieee80211_bss_conf *bss_conf, |
577 | u64 changes) |
578 | { |
579 | struct rt2x00_dev *rt2x00dev = hw->priv; |
580 | struct rt2x00_intf *intf = vif_to_intf(vif); |
581 | |
582 | /* |
583 | * mac80211 might be calling this function while we are trying |
584 | * to remove the device or perhaps suspending it. |
585 | */ |
586 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
587 | return; |
588 | |
589 | /* |
590 | * Update the BSSID. |
591 | */ |
592 | if (changes & BSS_CHANGED_BSSID) |
593 | rt2x00lib_config_intf(rt2x00dev, intf, type: vif->type, NULL, |
594 | bssid: bss_conf->bssid); |
595 | |
596 | /* |
597 | * Start/stop beaconing. |
598 | */ |
599 | if (changes & BSS_CHANGED_BEACON_ENABLED) { |
600 | mutex_lock(&intf->beacon_skb_mutex); |
601 | |
602 | /* |
603 | * Clear the 'enable_beacon' flag and clear beacon because |
604 | * the beacon queue has been stopped after hardware reset. |
605 | */ |
606 | if (test_bit(DEVICE_STATE_RESET, &rt2x00dev->flags) && |
607 | intf->enable_beacon) { |
608 | intf->enable_beacon = false; |
609 | rt2x00queue_clear_beacon(rt2x00dev, vif); |
610 | } |
611 | |
612 | if (!bss_conf->enable_beacon && intf->enable_beacon) { |
613 | rt2x00dev->intf_beaconing--; |
614 | intf->enable_beacon = false; |
615 | |
616 | if (rt2x00dev->intf_beaconing == 0) { |
617 | /* |
618 | * Last beaconing interface disabled |
619 | * -> stop beacon queue. |
620 | */ |
621 | rt2x00queue_stop_queue(queue: rt2x00dev->bcn); |
622 | } |
623 | /* |
624 | * Clear beacon in the H/W for this vif. This is needed |
625 | * to disable beaconing on this particular interface |
626 | * and keep it running on other interfaces. |
627 | */ |
628 | rt2x00queue_clear_beacon(rt2x00dev, vif); |
629 | } else if (bss_conf->enable_beacon && !intf->enable_beacon) { |
630 | rt2x00dev->intf_beaconing++; |
631 | intf->enable_beacon = true; |
632 | /* |
633 | * Upload beacon to the H/W. This is only required on |
634 | * USB devices. PCI devices fetch beacons periodically. |
635 | */ |
636 | if (rt2x00_is_usb(rt2x00dev)) |
637 | rt2x00queue_update_beacon(rt2x00dev, vif); |
638 | |
639 | if (rt2x00dev->intf_beaconing == 1) { |
640 | /* |
641 | * First beaconing interface enabled |
642 | * -> start beacon queue. |
643 | */ |
644 | rt2x00queue_start_queue(queue: rt2x00dev->bcn); |
645 | } |
646 | } |
647 | mutex_unlock(lock: &intf->beacon_skb_mutex); |
648 | } |
649 | |
650 | /* |
651 | * When the association status has changed we must reset the link |
652 | * tuner counter. This is because some drivers determine if they |
653 | * should perform link tuning based on the number of seconds |
654 | * while associated or not associated. |
655 | */ |
656 | if (changes & BSS_CHANGED_ASSOC) { |
657 | rt2x00dev->link.count = 0; |
658 | |
659 | if (vif->cfg.assoc) |
660 | rt2x00dev->intf_associated++; |
661 | else |
662 | rt2x00dev->intf_associated--; |
663 | |
664 | rt2x00leds_led_assoc(rt2x00dev, enabled: !!rt2x00dev->intf_associated); |
665 | } |
666 | |
667 | /* |
668 | * When the erp information has changed, we should perform |
669 | * additional configuration steps. For all other changes we are done. |
670 | */ |
671 | if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | |
672 | BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | |
673 | BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) |
674 | rt2x00lib_config_erp(rt2x00dev, intf, conf: bss_conf, changed: changes); |
675 | } |
676 | EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |
677 | |
678 | int rt2x00mac_conf_tx(struct ieee80211_hw *hw, |
679 | struct ieee80211_vif *vif, |
680 | unsigned int link_id, u16 queue_idx, |
681 | const struct ieee80211_tx_queue_params *params) |
682 | { |
683 | struct rt2x00_dev *rt2x00dev = hw->priv; |
684 | struct data_queue *queue; |
685 | |
686 | queue = rt2x00queue_get_tx_queue(rt2x00dev, queue: queue_idx); |
687 | if (unlikely(!queue)) |
688 | return -EINVAL; |
689 | |
690 | /* |
691 | * The passed variables are stored as real value ((2^n)-1). |
692 | * Ralink registers require to know the bit number 'n'. |
693 | */ |
694 | if (params->cw_min > 0) |
695 | queue->cw_min = fls(x: params->cw_min); |
696 | else |
697 | queue->cw_min = 5; /* cw_min: 2^5 = 32. */ |
698 | |
699 | if (params->cw_max > 0) |
700 | queue->cw_max = fls(x: params->cw_max); |
701 | else |
702 | queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ |
703 | |
704 | queue->aifs = params->aifs; |
705 | queue->txop = params->txop; |
706 | |
707 | rt2x00_dbg(rt2x00dev, |
708 | "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n" , |
709 | queue_idx, queue->cw_min, queue->cw_max, queue->aifs, |
710 | queue->txop); |
711 | |
712 | return 0; |
713 | } |
714 | EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); |
715 | |
716 | void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) |
717 | { |
718 | struct rt2x00_dev *rt2x00dev = hw->priv; |
719 | bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); |
720 | |
721 | wiphy_rfkill_set_hw_state(wiphy: hw->wiphy, blocked: !active); |
722 | } |
723 | EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); |
724 | |
725 | void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
726 | u32 queues, bool drop) |
727 | { |
728 | struct rt2x00_dev *rt2x00dev = hw->priv; |
729 | struct data_queue *queue; |
730 | |
731 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
732 | return; |
733 | |
734 | set_bit(nr: DEVICE_STATE_FLUSHING, addr: &rt2x00dev->flags); |
735 | |
736 | tx_queue_for_each(rt2x00dev, queue) |
737 | rt2x00queue_flush_queue(queue, drop); |
738 | |
739 | clear_bit(nr: DEVICE_STATE_FLUSHING, addr: &rt2x00dev->flags); |
740 | } |
741 | EXPORT_SYMBOL_GPL(rt2x00mac_flush); |
742 | |
743 | int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) |
744 | { |
745 | struct rt2x00_dev *rt2x00dev = hw->priv; |
746 | struct link_ant *ant = &rt2x00dev->link.ant; |
747 | struct antenna_setup *def = &rt2x00dev->default_ant; |
748 | struct antenna_setup setup; |
749 | |
750 | // The antenna value is not supposed to be 0, |
751 | // or exceed the maximum number of antenna's. |
752 | if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) |
753 | return -EINVAL; |
754 | |
755 | // When the client tried to configure the antenna to or from |
756 | // diversity mode, we must reset the default antenna as well |
757 | // as that controls the diversity switch. |
758 | if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) |
759 | ant->flags &= ~ANTENNA_TX_DIVERSITY; |
760 | if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) |
761 | ant->flags &= ~ANTENNA_RX_DIVERSITY; |
762 | |
763 | // If diversity is being enabled, check if we need hardware |
764 | // or software diversity. In the latter case, reset the value, |
765 | // and make sure we update the antenna flags to have the |
766 | // link tuner pick up the diversity tuning. |
767 | if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { |
768 | tx_ant = ANTENNA_SW_DIVERSITY; |
769 | ant->flags |= ANTENNA_TX_DIVERSITY; |
770 | } |
771 | |
772 | if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { |
773 | rx_ant = ANTENNA_SW_DIVERSITY; |
774 | ant->flags |= ANTENNA_RX_DIVERSITY; |
775 | } |
776 | |
777 | setup.tx = tx_ant; |
778 | setup.rx = rx_ant; |
779 | setup.rx_chain_num = 0; |
780 | setup.tx_chain_num = 0; |
781 | |
782 | rt2x00lib_config_antenna(rt2x00dev, ant: setup); |
783 | |
784 | return 0; |
785 | } |
786 | EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); |
787 | |
788 | int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) |
789 | { |
790 | struct rt2x00_dev *rt2x00dev = hw->priv; |
791 | struct link_ant *ant = &rt2x00dev->link.ant; |
792 | struct antenna_setup *active = &rt2x00dev->link.ant.active; |
793 | |
794 | // When software diversity is active, we must report this to the |
795 | // client and not the current active antenna state. |
796 | if (ant->flags & ANTENNA_TX_DIVERSITY) |
797 | *tx_ant = ANTENNA_HW_DIVERSITY; |
798 | else |
799 | *tx_ant = active->tx; |
800 | |
801 | if (ant->flags & ANTENNA_RX_DIVERSITY) |
802 | *rx_ant = ANTENNA_HW_DIVERSITY; |
803 | else |
804 | *rx_ant = active->rx; |
805 | |
806 | return 0; |
807 | } |
808 | EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); |
809 | |
810 | void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, |
811 | u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) |
812 | { |
813 | struct rt2x00_dev *rt2x00dev = hw->priv; |
814 | struct data_queue *queue; |
815 | |
816 | tx_queue_for_each(rt2x00dev, queue) { |
817 | *tx += queue->length; |
818 | *tx_max += queue->limit; |
819 | } |
820 | |
821 | *rx = rt2x00dev->rx->length; |
822 | *rx_max = rt2x00dev->rx->limit; |
823 | } |
824 | EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); |
825 | |
826 | bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) |
827 | { |
828 | struct rt2x00_dev *rt2x00dev = hw->priv; |
829 | struct data_queue *queue; |
830 | |
831 | tx_queue_for_each(rt2x00dev, queue) { |
832 | if (!rt2x00queue_empty(queue)) |
833 | return true; |
834 | } |
835 | |
836 | return false; |
837 | } |
838 | EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); |
839 | |