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95ea3627 | 1 | /* |
9c9a0d14 | 2 | Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
95ea3627 ID |
3 | <http://rt2x00.serialmonkey.com> |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
a05b8c58 | 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
95ea3627 ID |
17 | */ |
18 | ||
19 | /* | |
20 | Module: rt2x00mac | |
21 | Abstract: rt2x00 generic mac80211 routines. | |
22 | */ | |
23 | ||
95ea3627 ID |
24 | #include <linux/kernel.h> |
25 | #include <linux/module.h> | |
26 | ||
27 | #include "rt2x00.h" | |
28 | #include "rt2x00lib.h" | |
29 | ||
30 | static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 31 | struct data_queue *queue, |
e039fa4a | 32 | struct sk_buff *frag_skb) |
95ea3627 | 33 | { |
e039fa4a | 34 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb); |
e039fa4a | 35 | struct ieee80211_tx_info *rts_info; |
95ea3627 | 36 | struct sk_buff *skb; |
2bb057d0 | 37 | unsigned int data_length; |
b9740c23 | 38 | int retval = 0; |
95ea3627 | 39 | |
e6a9854b | 40 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
2bb057d0 | 41 | data_length = sizeof(struct ieee80211_cts); |
95ea3627 | 42 | else |
2bb057d0 | 43 | data_length = sizeof(struct ieee80211_rts); |
95ea3627 | 44 | |
2bb057d0 | 45 | skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom); |
b9740c23 | 46 | if (unlikely(!skb)) { |
ec9c4989 | 47 | rt2x00_warn(rt2x00dev, "Failed to create RTS/CTS frame\n"); |
b9740c23 | 48 | return -ENOMEM; |
95ea3627 ID |
49 | } |
50 | ||
51 | skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); | |
2bb057d0 | 52 | skb_put(skb, data_length); |
95ea3627 | 53 | |
e039fa4a JB |
54 | /* |
55 | * Copy TX information over from original frame to | |
56 | * RTS/CTS frame. Note that we set the no encryption flag | |
57 | * since we don't want this frame to be encrypted. | |
58 | * RTS frames should be acked, while CTS-to-self frames | |
59 | * should not. The ready for TX flag is cleared to prevent | |
60 | * it being automatically send when the descriptor is | |
61 | * written to the hardware. | |
62 | */ | |
63 | memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); | |
64 | rts_info = IEEE80211_SKB_CB(skb); | |
e6a9854b JB |
65 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; |
66 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e039fa4a | 67 | |
e6a9854b | 68 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
e039fa4a JB |
69 | rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; |
70 | else | |
71 | rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; | |
72 | ||
18ad01c4 JB |
73 | /* Disable hardware encryption */ |
74 | rts_info->control.hw_key = NULL; | |
2bb057d0 ID |
75 | |
76 | /* | |
77 | * RTS/CTS frame should use the length of the frame plus any | |
78 | * encryption overhead that will be added by the hardware. | |
79 | */ | |
7b40982e | 80 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); |
2bb057d0 | 81 | |
e6a9854b | 82 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
e039fa4a | 83 | ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif, |
2bb057d0 | 84 | frag_skb->data, data_length, tx_info, |
95ea3627 ID |
85 | (struct ieee80211_cts *)(skb->data)); |
86 | else | |
e039fa4a | 87 | ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif, |
2bb057d0 | 88 | frag_skb->data, data_length, tx_info, |
95ea3627 ID |
89 | (struct ieee80211_rts *)(skb->data)); |
90 | ||
3d8bfe14 | 91 | retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true); |
b9740c23 | 92 | if (retval) { |
e7087a82 | 93 | dev_kfree_skb_any(skb); |
ec9c4989 | 94 | rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n"); |
95ea3627 ID |
95 | } |
96 | ||
b9740c23 | 97 | return retval; |
95ea3627 ID |
98 | } |
99 | ||
36323f81 TH |
100 | void rt2x00mac_tx(struct ieee80211_hw *hw, |
101 | struct ieee80211_tx_control *control, | |
102 | struct sk_buff *skb) | |
95ea3627 ID |
103 | { |
104 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
e039fa4a | 105 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
e2530083 | 106 | enum data_queue_qid qid = skb_get_queue_mapping(skb); |
0b7fde54 | 107 | struct data_queue *queue = NULL; |
95ea3627 | 108 | |
066cb637 ID |
109 | /* |
110 | * Mac80211 might be calling this function while we are trying | |
111 | * to remove the device or perhaps suspending it. | |
112 | * Note that we can only stop the TX queues inside the TX path | |
113 | * due to possible race conditions in mac80211. | |
114 | */ | |
0262ab0d | 115 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
00898a47 | 116 | goto exit_free_skb; |
066cb637 | 117 | |
95ea3627 | 118 | /* |
61c6e489 | 119 | * Use the ATIM queue if appropriate and present. |
95ea3627 | 120 | */ |
e039fa4a | 121 | if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
b9d305cc | 122 | rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE)) |
61c6e489 GW |
123 | qid = QID_ATIM; |
124 | ||
125 | queue = rt2x00queue_get_tx_queue(rt2x00dev, qid); | |
181d6902 | 126 | if (unlikely(!queue)) { |
ec9c4989 JP |
127 | rt2x00_err(rt2x00dev, |
128 | "Attempt to send packet over invalid queue %d\n" | |
129 | "Please file bug report to %s\n", qid, DRV_PROJECT); | |
00898a47 | 130 | goto exit_free_skb; |
95ea3627 ID |
131 | } |
132 | ||
133 | /* | |
772a249d ID |
134 | * If CTS/RTS is required. create and queue that frame first. |
135 | * Make sure we have at least enough entries available to send | |
136 | * this CTS/RTS frame as well as the data frame. | |
2d9ccf84 ID |
137 | * Note that when the driver has set the set_rts_threshold() |
138 | * callback function it doesn't need software generation of | |
772a249d | 139 | * either RTS or CTS-to-self frame and handles everything |
2d9ccf84 | 140 | * inside the hardware. |
95ea3627 | 141 | */ |
430df798 HS |
142 | if (!rt2x00dev->ops->hw->set_rts_threshold && |
143 | (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | | |
144 | IEEE80211_TX_RC_USE_CTS_PROTECT))) { | |
b9740c23 DW |
145 | if (rt2x00queue_available(queue) <= 1) |
146 | goto exit_fail; | |
95ea3627 | 147 | |
b9740c23 DW |
148 | if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) |
149 | goto exit_fail; | |
1230cb83 ID |
150 | } |
151 | ||
3d8bfe14 | 152 | if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false))) |
b9740c23 DW |
153 | goto exit_fail; |
154 | ||
3780d038 SG |
155 | /* |
156 | * Pausing queue has to be serialized with rt2x00lib_txdone(). Note | |
157 | * we should not use spin_lock_bh variant as bottom halve was already | |
158 | * disabled before ieee80211_xmit() call. | |
159 | */ | |
160 | spin_lock(&queue->tx_lock); | |
b869767b | 161 | if (rt2x00queue_threshold(queue)) |
0b7fde54 | 162 | rt2x00queue_pause_queue(queue); |
3780d038 | 163 | spin_unlock(&queue->tx_lock); |
95ea3627 | 164 | |
7bb45683 | 165 | return; |
b9740c23 DW |
166 | |
167 | exit_fail: | |
3780d038 | 168 | spin_lock(&queue->tx_lock); |
62fe7784 | 169 | rt2x00queue_pause_queue(queue); |
3780d038 | 170 | spin_unlock(&queue->tx_lock); |
00898a47 | 171 | exit_free_skb: |
e4522ab1 | 172 | ieee80211_free_txskb(hw, skb); |
95ea3627 ID |
173 | } |
174 | EXPORT_SYMBOL_GPL(rt2x00mac_tx); | |
175 | ||
176 | int rt2x00mac_start(struct ieee80211_hw *hw) | |
177 | { | |
178 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 | 179 | |
0262ab0d | 180 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
181 | return 0; |
182 | ||
e37ea213 | 183 | return rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
184 | } |
185 | EXPORT_SYMBOL_GPL(rt2x00mac_start); | |
186 | ||
187 | void rt2x00mac_stop(struct ieee80211_hw *hw) | |
188 | { | |
189 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
190 | ||
0262ab0d | 191 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
066cb637 ID |
192 | return; |
193 | ||
e37ea213 | 194 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
195 | } |
196 | EXPORT_SYMBOL_GPL(rt2x00mac_stop); | |
197 | ||
198 | int rt2x00mac_add_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 199 | struct ieee80211_vif *vif) |
95ea3627 ID |
200 | { |
201 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
1ed32e4f | 202 | struct rt2x00_intf *intf = vif_to_intf(vif); |
a2440830 | 203 | struct data_queue *queue = rt2x00dev->bcn; |
6bb40dd1 ID |
204 | struct queue_entry *entry = NULL; |
205 | unsigned int i; | |
95ea3627 ID |
206 | |
207 | /* | |
6bb40dd1 ID |
208 | * Don't allow interfaces to be added |
209 | * the device has disappeared. | |
95ea3627 | 210 | */ |
0262ab0d ID |
211 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
212 | !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) | |
6bb40dd1 ID |
213 | return -ENODEV; |
214 | ||
6bb40dd1 ID |
215 | /* |
216 | * Loop through all beacon queues to find a free | |
217 | * entry. Since there are as much beacon entries | |
218 | * as the maximum interfaces, this search shouldn't | |
219 | * fail. | |
220 | */ | |
221 | for (i = 0; i < queue->limit; i++) { | |
222 | entry = &queue->entries[i]; | |
0262ab0d | 223 | if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) |
6bb40dd1 ID |
224 | break; |
225 | } | |
226 | ||
227 | if (unlikely(i == queue->limit)) | |
95ea3627 ID |
228 | return -ENOBUFS; |
229 | ||
6bb40dd1 ID |
230 | /* |
231 | * We are now absolutely sure the interface can be created, | |
232 | * increase interface count and start initialization. | |
233 | */ | |
234 | ||
1ed32e4f | 235 | if (vif->type == NL80211_IFTYPE_AP) |
6bb40dd1 ID |
236 | rt2x00dev->intf_ap_count++; |
237 | else | |
238 | rt2x00dev->intf_sta_count++; | |
239 | ||
17512dc3 | 240 | mutex_init(&intf->beacon_skb_mutex); |
6bb40dd1 ID |
241 | intf->beacon = entry; |
242 | ||
95ea3627 | 243 | /* |
b595076a | 244 | * The MAC address must be configured after the device |
4150c572 JB |
245 | * has been initialized. Otherwise the device can reset |
246 | * the MAC registers. | |
06b3cda0 ID |
247 | * The BSSID address must only be configured in AP mode, |
248 | * however we should not send an empty BSSID address for | |
249 | * STA interfaces at this time, since this can cause | |
250 | * invalid behavior in the device. | |
95ea3627 | 251 | */ |
fa8b4b22 | 252 | rt2x00lib_config_intf(rt2x00dev, intf, vif->type, |
a39fd6be | 253 | vif->addr, NULL); |
95ea3627 | 254 | |
e0b005fa ID |
255 | /* |
256 | * Some filters depend on the current working mode. We can force | |
257 | * an update during the next configure_filter() run by mac80211 by | |
258 | * resetting the current packet_filter state. | |
259 | */ | |
260 | rt2x00dev->packet_filter = 0; | |
261 | ||
95ea3627 ID |
262 | return 0; |
263 | } | |
264 | EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); | |
265 | ||
266 | void rt2x00mac_remove_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 267 | struct ieee80211_vif *vif) |
95ea3627 ID |
268 | { |
269 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
1ed32e4f | 270 | struct rt2x00_intf *intf = vif_to_intf(vif); |
95ea3627 ID |
271 | |
272 | /* | |
066cb637 ID |
273 | * Don't allow interfaces to be remove while |
274 | * either the device has disappeared or when | |
275 | * no interface is present. | |
95ea3627 | 276 | */ |
0262ab0d | 277 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
1ed32e4f JB |
278 | (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || |
279 | (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) | |
95ea3627 ID |
280 | return; |
281 | ||
1ed32e4f | 282 | if (vif->type == NL80211_IFTYPE_AP) |
6bb40dd1 ID |
283 | rt2x00dev->intf_ap_count--; |
284 | else | |
285 | rt2x00dev->intf_sta_count--; | |
286 | ||
287 | /* | |
288 | * Release beacon entry so it is available for | |
289 | * new interfaces again. | |
290 | */ | |
0262ab0d | 291 | clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); |
95ea3627 ID |
292 | |
293 | /* | |
294 | * Make sure the bssid and mac address registers | |
295 | * are cleared to prevent false ACKing of frames. | |
296 | */ | |
6bb40dd1 | 297 | rt2x00lib_config_intf(rt2x00dev, intf, |
05c914fe | 298 | NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); |
95ea3627 ID |
299 | } |
300 | EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); | |
301 | ||
e8975581 | 302 | int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) |
95ea3627 ID |
303 | { |
304 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
e8975581 | 305 | struct ieee80211_conf *conf = &hw->conf; |
95ea3627 ID |
306 | |
307 | /* | |
49513481 | 308 | * mac80211 might be calling this function while we are trying |
066cb637 | 309 | * to remove the device or perhaps suspending it. |
95ea3627 | 310 | */ |
0262ab0d | 311 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
312 | return 0; |
313 | ||
314 | /* | |
bdfa500b ID |
315 | * Some configuration parameters (e.g. channel and antenna values) can |
316 | * only be set when the radio is enabled, but do require the RX to | |
d8147f9d ID |
317 | * be off. During this period we should keep link tuning enabled, |
318 | * if for any reason the link tuner must be reset, this will be | |
319 | * handled by rt2x00lib_config(). | |
95ea3627 | 320 | */ |
0b7fde54 | 321 | rt2x00queue_stop_queue(rt2x00dev->rx); |
95ea3627 | 322 | |
bdfa500b ID |
323 | /* |
324 | * When we've just turned on the radio, we want to reprogram | |
325 | * everything to ensure a consistent state | |
326 | */ | |
327 | rt2x00lib_config(rt2x00dev, conf, changed); | |
74c0ee9b | 328 | |
bdfa500b ID |
329 | /* |
330 | * After the radio has been enabled we need to configure | |
331 | * the antenna to the default settings. rt2x00lib_config_antenna() | |
332 | * should determine if any action should be taken based on | |
333 | * checking if diversity has been enabled or no antenna changes | |
334 | * have been made since the last configuration change. | |
335 | */ | |
336 | rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); | |
95ea3627 | 337 | |
bdfa500b | 338 | /* Turn RX back on */ |
0b7fde54 | 339 | rt2x00queue_start_queue(rt2x00dev->rx); |
95ea3627 ID |
340 | |
341 | return 0; | |
342 | } | |
343 | EXPORT_SYMBOL_GPL(rt2x00mac_config); | |
344 | ||
3a643d24 ID |
345 | void rt2x00mac_configure_filter(struct ieee80211_hw *hw, |
346 | unsigned int changed_flags, | |
347 | unsigned int *total_flags, | |
3ac64bee | 348 | u64 multicast) |
3a643d24 ID |
349 | { |
350 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
351 | ||
352 | /* | |
353 | * Mask off any flags we are going to ignore | |
354 | * from the total_flags field. | |
355 | */ | |
356 | *total_flags &= | |
357 | FIF_ALLMULTI | | |
358 | FIF_FCSFAIL | | |
359 | FIF_PLCPFAIL | | |
360 | FIF_CONTROL | | |
1afcfd54 | 361 | FIF_PSPOLL | |
df140465 | 362 | FIF_OTHER_BSS; |
3a643d24 ID |
363 | |
364 | /* | |
365 | * Apply some rules to the filters: | |
366 | * - Some filters imply different filters to be set. | |
367 | * - Some things we can't filter out at all. | |
368 | * - Multicast filter seems to kill broadcast traffic so never use it. | |
369 | */ | |
370 | *total_flags |= FIF_ALLMULTI; | |
3a643d24 | 371 | |
1afcfd54 IP |
372 | /* |
373 | * If the device has a single filter for all control frames, | |
374 | * FIF_CONTROL and FIF_PSPOLL flags imply each other. | |
375 | * And if the device has more than one filter for control frames | |
376 | * of different types, but has no a separate filter for PS Poll frames, | |
377 | * FIF_CONTROL flag implies FIF_PSPOLL. | |
378 | */ | |
7b8a00dc | 379 | if (!rt2x00_has_cap_control_filters(rt2x00dev)) { |
1afcfd54 IP |
380 | if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) |
381 | *total_flags |= FIF_CONTROL | FIF_PSPOLL; | |
382 | } | |
7b8a00dc | 383 | if (!rt2x00_has_cap_control_filter_pspoll(rt2x00dev)) { |
1afcfd54 IP |
384 | if (*total_flags & FIF_CONTROL) |
385 | *total_flags |= FIF_PSPOLL; | |
386 | } | |
387 | ||
3a643d24 ID |
388 | rt2x00dev->packet_filter = *total_flags; |
389 | ||
afa62042 | 390 | rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); |
3a643d24 ID |
391 | } |
392 | EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); | |
393 | ||
4dee32f5 HS |
394 | static void rt2x00mac_set_tim_iter(void *data, u8 *mac, |
395 | struct ieee80211_vif *vif) | |
396 | { | |
397 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
398 | ||
399 | if (vif->type != NL80211_IFTYPE_AP && | |
400 | vif->type != NL80211_IFTYPE_ADHOC && | |
401 | vif->type != NL80211_IFTYPE_MESH_POINT && | |
402 | vif->type != NL80211_IFTYPE_WDS) | |
403 | return; | |
404 | ||
bfe6a15d | 405 | set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); |
4dee32f5 HS |
406 | } |
407 | ||
ad2f34b4 ID |
408 | int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
409 | bool set) | |
410 | { | |
411 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
412 | ||
4dee32f5 HS |
413 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
414 | return 0; | |
415 | ||
8b2c9824 JB |
416 | ieee80211_iterate_active_interfaces_atomic( |
417 | rt2x00dev->hw, IEEE80211_IFACE_ITER_RESUME_ALL, | |
418 | rt2x00mac_set_tim_iter, rt2x00dev); | |
4dee32f5 HS |
419 | |
420 | /* queue work to upodate the beacon template */ | |
421 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); | |
ad2f34b4 ID |
422 | return 0; |
423 | } | |
424 | EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); | |
425 | ||
2bb057d0 | 426 | #ifdef CONFIG_RT2X00_LIB_CRYPTO |
7b40982e ID |
427 | static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) |
428 | { | |
429 | if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) | |
736e3aca | 430 | memcpy(crypto->key, |
7b40982e ID |
431 | &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], |
432 | sizeof(crypto->key)); | |
433 | ||
434 | if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) | |
736e3aca | 435 | memcpy(crypto->tx_mic, |
7b40982e ID |
436 | &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], |
437 | sizeof(crypto->tx_mic)); | |
438 | ||
439 | if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) | |
736e3aca | 440 | memcpy(crypto->rx_mic, |
7b40982e ID |
441 | &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], |
442 | sizeof(crypto->rx_mic)); | |
443 | } | |
444 | ||
2bb057d0 | 445 | int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
dc822b5d | 446 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
2bb057d0 ID |
447 | struct ieee80211_key_conf *key) |
448 | { | |
449 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
450 | int (*set_key) (struct rt2x00_dev *rt2x00dev, | |
451 | struct rt2x00lib_crypto *crypto, | |
452 | struct ieee80211_key_conf *key); | |
453 | struct rt2x00lib_crypto crypto; | |
dc822b5d JB |
454 | static const u8 bcast_addr[ETH_ALEN] = |
455 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; | |
f03fcfc1 | 456 | struct rt2x00_sta *sta_priv = NULL; |
2bb057d0 | 457 | |
8058409c ID |
458 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
459 | return 0; | |
6851dff3 | 460 | |
7b8a00dc | 461 | if (!rt2x00_has_cap_hw_crypto(rt2x00dev)) |
6851dff3 SG |
462 | return -EOPNOTSUPP; |
463 | ||
464 | /* | |
465 | * To support IBSS RSN, don't program group keys in IBSS, the | |
466 | * hardware will then not attempt to decrypt the frames. | |
467 | */ | |
468 | if (vif->type == NL80211_IFTYPE_ADHOC && | |
469 | !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
2bb057d0 | 470 | return -EOPNOTSUPP; |
6851dff3 SG |
471 | |
472 | if (key->keylen > 32) | |
2bb057d0 ID |
473 | return -ENOSPC; |
474 | ||
475 | memset(&crypto, 0, sizeof(crypto)); | |
476 | ||
18325523 | 477 | crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); |
2bb057d0 ID |
478 | crypto.cipher = rt2x00crypto_key_to_cipher(key); |
479 | if (crypto.cipher == CIPHER_NONE) | |
480 | return -EOPNOTSUPP; | |
8edcb0ba SG |
481 | if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) |
482 | return -EOPNOTSUPP; | |
2bb057d0 ID |
483 | |
484 | crypto.cmd = cmd; | |
dc822b5d | 485 | |
f03fcfc1 | 486 | if (sta) { |
dc822b5d | 487 | crypto.address = sta->addr; |
f03fcfc1 HS |
488 | sta_priv = sta_to_rt2x00_sta(sta); |
489 | crypto.wcid = sta_priv->wcid; | |
490 | } else | |
dc822b5d | 491 | crypto.address = bcast_addr; |
2bb057d0 | 492 | |
7b40982e ID |
493 | if (crypto.cipher == CIPHER_TKIP) |
494 | memcpy_tkip(&crypto, &key->key[0], key->keylen); | |
495 | else | |
736e3aca | 496 | memcpy(crypto.key, &key->key[0], key->keylen); |
2bb057d0 ID |
497 | /* |
498 | * Each BSS has a maximum of 4 shared keys. | |
499 | * Shared key index values: | |
500 | * 0) BSS0 key0 | |
501 | * 1) BSS0 key1 | |
502 | * ... | |
503 | * 4) BSS1 key0 | |
504 | * ... | |
505 | * 8) BSS2 key0 | |
506 | * ... | |
507 | * Both pairwise as shared key indeces are determined by | |
508 | * driver. This is required because the hardware requires | |
509 | * keys to be assigned in correct order (When key 1 is | |
510 | * provided but key 0 is not, then the key is not found | |
511 | * by the hardware during RX). | |
512 | */ | |
acaf908d ID |
513 | if (cmd == SET_KEY) |
514 | key->hw_key_idx = 0; | |
2bb057d0 ID |
515 | |
516 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) | |
517 | set_key = rt2x00dev->ops->lib->config_pairwise_key; | |
518 | else | |
519 | set_key = rt2x00dev->ops->lib->config_shared_key; | |
520 | ||
521 | if (!set_key) | |
522 | return -EOPNOTSUPP; | |
523 | ||
524 | return set_key(rt2x00dev, &crypto, key); | |
525 | } | |
526 | EXPORT_SYMBOL_GPL(rt2x00mac_set_key); | |
527 | #endif /* CONFIG_RT2X00_LIB_CRYPTO */ | |
528 | ||
b4943d81 HS |
529 | int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
530 | struct ieee80211_sta *sta) | |
531 | { | |
532 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
b4943d81 | 533 | |
ed8e0ed5 | 534 | return rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta); |
b4943d81 HS |
535 | } |
536 | EXPORT_SYMBOL_GPL(rt2x00mac_sta_add); | |
537 | ||
538 | int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, | |
539 | struct ieee80211_sta *sta) | |
540 | { | |
541 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
b4943d81 | 542 | |
8f03a7c6 | 543 | return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta); |
b4943d81 HS |
544 | } |
545 | EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove); | |
546 | ||
a344d677 JB |
547 | void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, |
548 | struct ieee80211_vif *vif, | |
549 | const u8 *mac_addr) | |
d8147f9d ID |
550 | { |
551 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
7dab73b3 | 552 | set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
d8147f9d ID |
553 | rt2x00link_stop_tuner(rt2x00dev); |
554 | } | |
555 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); | |
556 | ||
a344d677 JB |
557 | void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, |
558 | struct ieee80211_vif *vif) | |
d8147f9d ID |
559 | { |
560 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
7dab73b3 | 561 | clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
d8147f9d ID |
562 | rt2x00link_start_tuner(rt2x00dev); |
563 | } | |
564 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); | |
565 | ||
95ea3627 ID |
566 | int rt2x00mac_get_stats(struct ieee80211_hw *hw, |
567 | struct ieee80211_low_level_stats *stats) | |
568 | { | |
569 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
570 | ||
571 | /* | |
572 | * The dot11ACKFailureCount, dot11RTSFailureCount and | |
573 | * dot11RTSSuccessCount are updated in interrupt time. | |
574 | * dot11FCSErrorCount is updated in the link tuner. | |
575 | */ | |
576 | memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); | |
577 | ||
578 | return 0; | |
579 | } | |
580 | EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); | |
581 | ||
471b3efd JB |
582 | void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, |
583 | struct ieee80211_vif *vif, | |
584 | struct ieee80211_bss_conf *bss_conf, | |
585 | u32 changes) | |
5c58ee51 ID |
586 | { |
587 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
6bb40dd1 | 588 | struct rt2x00_intf *intf = vif_to_intf(vif); |
2d0ddec5 JB |
589 | |
590 | /* | |
49513481 | 591 | * mac80211 might be calling this function while we are trying |
2d0ddec5 JB |
592 | * to remove the device or perhaps suspending it. |
593 | */ | |
594 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
595 | return; | |
596 | ||
2d0ddec5 | 597 | /* |
5af3c1d1 | 598 | * Update the BSSID. |
2d0ddec5 JB |
599 | */ |
600 | if (changes & BSS_CHANGED_BSSID) | |
601 | rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, | |
1ed7a17a | 602 | bss_conf->bssid); |
2d0ddec5 | 603 | |
69cf36a4 HS |
604 | /* |
605 | * Start/stop beaconing. | |
606 | */ | |
607 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
283dafa1 | 608 | mutex_lock(&intf->beacon_skb_mutex); |
69cf36a4 | 609 | if (!bss_conf->enable_beacon && intf->enable_beacon) { |
69cf36a4 HS |
610 | rt2x00dev->intf_beaconing--; |
611 | intf->enable_beacon = false; | |
612 | ||
613 | if (rt2x00dev->intf_beaconing == 0) { | |
614 | /* | |
615 | * Last beaconing interface disabled | |
616 | * -> stop beacon queue. | |
617 | */ | |
69cf36a4 | 618 | rt2x00queue_stop_queue(rt2x00dev->bcn); |
69cf36a4 | 619 | } |
ddb40550 SG |
620 | /* |
621 | * Clear beacon in the H/W for this vif. This is needed | |
622 | * to disable beaconing on this particular interface | |
623 | * and keep it running on other interfaces. | |
624 | */ | |
625 | rt2x00queue_clear_beacon(rt2x00dev, vif); | |
69cf36a4 HS |
626 | } else if (bss_conf->enable_beacon && !intf->enable_beacon) { |
627 | rt2x00dev->intf_beaconing++; | |
628 | intf->enable_beacon = true; | |
8834d360 SG |
629 | /* |
630 | * Upload beacon to the H/W. This is only required on | |
631 | * USB devices. PCI devices fetch beacons periodically. | |
632 | */ | |
633 | if (rt2x00_is_usb(rt2x00dev)) | |
634 | rt2x00queue_update_beacon(rt2x00dev, vif); | |
69cf36a4 HS |
635 | |
636 | if (rt2x00dev->intf_beaconing == 1) { | |
637 | /* | |
638 | * First beaconing interface enabled | |
639 | * -> start beacon queue. | |
640 | */ | |
69cf36a4 | 641 | rt2x00queue_start_queue(rt2x00dev->bcn); |
69cf36a4 HS |
642 | } |
643 | } | |
283dafa1 | 644 | mutex_unlock(&intf->beacon_skb_mutex); |
69cf36a4 | 645 | } |
5c58ee51 ID |
646 | |
647 | /* | |
6bb40dd1 ID |
648 | * When the association status has changed we must reset the link |
649 | * tuner counter. This is because some drivers determine if they | |
650 | * should perform link tuning based on the number of seconds | |
651 | * while associated or not associated. | |
5c58ee51 | 652 | */ |
6bb40dd1 ID |
653 | if (changes & BSS_CHANGED_ASSOC) { |
654 | rt2x00dev->link.count = 0; | |
5c58ee51 | 655 | |
6bb40dd1 ID |
656 | if (bss_conf->assoc) |
657 | rt2x00dev->intf_associated++; | |
658 | else | |
659 | rt2x00dev->intf_associated--; | |
a2e1d52a | 660 | |
d904dc17 | 661 | rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); |
e66a8ddf SG |
662 | |
663 | clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); | |
6bb40dd1 | 664 | } |
5c58ee51 | 665 | |
e66a8ddf SG |
666 | /* |
667 | * Check for access point which do not support 802.11e . We have to | |
668 | * generate data frames sequence number in S/W for such AP, because | |
669 | * of H/W bug. | |
670 | */ | |
671 | if (changes & BSS_CHANGED_QOS && !bss_conf->qos) | |
672 | set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); | |
673 | ||
6bb40dd1 | 674 | /* |
72810379 ID |
675 | * When the erp information has changed, we should perform |
676 | * additional configuration steps. For all other changes we are done. | |
6bb40dd1 | 677 | */ |
02044643 HS |
678 | if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | |
679 | BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | | |
87c1915d | 680 | BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) |
02044643 | 681 | rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); |
5c58ee51 | 682 | } |
471b3efd | 683 | EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |
5c58ee51 | 684 | |
8a3a3c85 EP |
685 | int rt2x00mac_conf_tx(struct ieee80211_hw *hw, |
686 | struct ieee80211_vif *vif, u16 queue_idx, | |
95ea3627 ID |
687 | const struct ieee80211_tx_queue_params *params) |
688 | { | |
689 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
181d6902 | 690 | struct data_queue *queue; |
95ea3627 | 691 | |
11f818e0 | 692 | queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); |
181d6902 | 693 | if (unlikely(!queue)) |
95ea3627 ID |
694 | return -EINVAL; |
695 | ||
696 | /* | |
697 | * The passed variables are stored as real value ((2^n)-1). | |
698 | * Ralink registers require to know the bit number 'n'. | |
699 | */ | |
3b3618ad | 700 | if (params->cw_min > 0) |
181d6902 | 701 | queue->cw_min = fls(params->cw_min); |
95ea3627 | 702 | else |
181d6902 | 703 | queue->cw_min = 5; /* cw_min: 2^5 = 32. */ |
95ea3627 | 704 | |
3b3618ad | 705 | if (params->cw_max > 0) |
181d6902 | 706 | queue->cw_max = fls(params->cw_max); |
95ea3627 | 707 | else |
181d6902 | 708 | queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ |
95ea3627 | 709 | |
0b57664c | 710 | queue->aifs = params->aifs; |
2af0a570 | 711 | queue->txop = params->txop; |
95ea3627 | 712 | |
ec9c4989 JP |
713 | rt2x00_dbg(rt2x00dev, |
714 | "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d\n", | |
715 | queue_idx, queue->cw_min, queue->cw_max, queue->aifs, | |
716 | queue->txop); | |
95ea3627 ID |
717 | |
718 | return 0; | |
719 | } | |
720 | EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); | |
e47a5cdd ID |
721 | |
722 | void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) | |
723 | { | |
724 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
73077c85 | 725 | bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); |
e47a5cdd | 726 | |
73077c85 | 727 | wiphy_rfkill_set_hw_state(hw->wiphy, !active); |
e47a5cdd ID |
728 | } |
729 | EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); | |
f44df18c | 730 | |
77be2c54 EG |
731 | void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
732 | u32 queues, bool drop) | |
f44df18c ID |
733 | { |
734 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
735 | struct data_queue *queue; | |
f44df18c | 736 | |
5671ab05 SG |
737 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
738 | return; | |
739 | ||
5be65609 ID |
740 | tx_queue_for_each(rt2x00dev, queue) |
741 | rt2x00queue_flush_queue(queue, drop); | |
f44df18c ID |
742 | } |
743 | EXPORT_SYMBOL_GPL(rt2x00mac_flush); | |
e7dee444 | 744 | |
0ed7b3c0 ID |
745 | int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) |
746 | { | |
747 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
748 | struct link_ant *ant = &rt2x00dev->link.ant; | |
749 | struct antenna_setup *def = &rt2x00dev->default_ant; | |
750 | struct antenna_setup setup; | |
751 | ||
752 | // The antenna value is not supposed to be 0, | |
753 | // or exceed the maximum number of antenna's. | |
754 | if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) | |
755 | return -EINVAL; | |
756 | ||
757 | // When the client tried to configure the antenna to or from | |
758 | // diversity mode, we must reset the default antenna as well | |
759 | // as that controls the diversity switch. | |
760 | if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) | |
761 | ant->flags &= ~ANTENNA_TX_DIVERSITY; | |
762 | if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) | |
763 | ant->flags &= ~ANTENNA_RX_DIVERSITY; | |
764 | ||
765 | // If diversity is being enabled, check if we need hardware | |
766 | // or software diversity. In the latter case, reset the value, | |
767 | // and make sure we update the antenna flags to have the | |
768 | // link tuner pick up the diversity tuning. | |
769 | if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { | |
770 | tx_ant = ANTENNA_SW_DIVERSITY; | |
771 | ant->flags |= ANTENNA_TX_DIVERSITY; | |
772 | } | |
773 | ||
774 | if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { | |
775 | rx_ant = ANTENNA_SW_DIVERSITY; | |
776 | ant->flags |= ANTENNA_RX_DIVERSITY; | |
777 | } | |
778 | ||
779 | setup.tx = tx_ant; | |
780 | setup.rx = rx_ant; | |
57eaeb6e RS |
781 | setup.rx_chain_num = 0; |
782 | setup.tx_chain_num = 0; | |
0ed7b3c0 ID |
783 | |
784 | rt2x00lib_config_antenna(rt2x00dev, setup); | |
785 | ||
786 | return 0; | |
787 | } | |
788 | EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); | |
789 | ||
790 | int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) | |
791 | { | |
792 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
793 | struct link_ant *ant = &rt2x00dev->link.ant; | |
794 | struct antenna_setup *active = &rt2x00dev->link.ant.active; | |
795 | ||
796 | // When software diversity is active, we must report this to the | |
797 | // client and not the current active antenna state. | |
798 | if (ant->flags & ANTENNA_TX_DIVERSITY) | |
799 | *tx_ant = ANTENNA_HW_DIVERSITY; | |
800 | else | |
801 | *tx_ant = active->tx; | |
802 | ||
803 | if (ant->flags & ANTENNA_RX_DIVERSITY) | |
804 | *rx_ant = ANTENNA_HW_DIVERSITY; | |
805 | else | |
806 | *rx_ant = active->rx; | |
807 | ||
808 | return 0; | |
809 | } | |
810 | EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); | |
811 | ||
e7dee444 ID |
812 | void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, |
813 | u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) | |
814 | { | |
815 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
816 | struct data_queue *queue; | |
817 | ||
818 | tx_queue_for_each(rt2x00dev, queue) { | |
819 | *tx += queue->length; | |
820 | *tx_max += queue->limit; | |
821 | } | |
822 | ||
823 | *rx = rt2x00dev->rx->length; | |
824 | *rx_max = rt2x00dev->rx->limit; | |
825 | } | |
826 | EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); | |
5f0dd296 GW |
827 | |
828 | bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) | |
829 | { | |
830 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
831 | struct data_queue *queue; | |
832 | ||
833 | tx_queue_for_each(rt2x00dev, queue) { | |
834 | if (!rt2x00queue_empty(queue)) | |
835 | return true; | |
836 | } | |
837 | ||
838 | return false; | |
839 | } | |
840 | EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); |