Commit | Line | Data |
---|---|---|
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 | |
16 | along with this program; if not, write to the | |
17 | Free Software Foundation, Inc., | |
18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | /* | |
22 | Module: rt2x00mac | |
23 | Abstract: rt2x00 generic mac80211 routines. | |
24 | */ | |
25 | ||
95ea3627 ID |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | ||
29 | #include "rt2x00.h" | |
30 | #include "rt2x00lib.h" | |
31 | ||
32 | static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 33 | struct data_queue *queue, |
e039fa4a | 34 | struct sk_buff *frag_skb) |
95ea3627 | 35 | { |
e039fa4a | 36 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(frag_skb); |
e039fa4a | 37 | struct ieee80211_tx_info *rts_info; |
95ea3627 | 38 | struct sk_buff *skb; |
2bb057d0 | 39 | unsigned int data_length; |
b9740c23 | 40 | int retval = 0; |
95ea3627 | 41 | |
e6a9854b | 42 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
2bb057d0 | 43 | data_length = sizeof(struct ieee80211_cts); |
95ea3627 | 44 | else |
2bb057d0 | 45 | data_length = sizeof(struct ieee80211_rts); |
95ea3627 | 46 | |
2bb057d0 | 47 | skb = dev_alloc_skb(data_length + rt2x00dev->hw->extra_tx_headroom); |
b9740c23 | 48 | if (unlikely(!skb)) { |
95ea3627 | 49 | WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n"); |
b9740c23 | 50 | return -ENOMEM; |
95ea3627 ID |
51 | } |
52 | ||
53 | skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); | |
2bb057d0 | 54 | skb_put(skb, data_length); |
95ea3627 | 55 | |
e039fa4a JB |
56 | /* |
57 | * Copy TX information over from original frame to | |
58 | * RTS/CTS frame. Note that we set the no encryption flag | |
59 | * since we don't want this frame to be encrypted. | |
60 | * RTS frames should be acked, while CTS-to-self frames | |
61 | * should not. The ready for TX flag is cleared to prevent | |
62 | * it being automatically send when the descriptor is | |
63 | * written to the hardware. | |
64 | */ | |
65 | memcpy(skb->cb, frag_skb->cb, sizeof(skb->cb)); | |
66 | rts_info = IEEE80211_SKB_CB(skb); | |
e6a9854b JB |
67 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_RTS_CTS; |
68 | rts_info->control.rates[0].flags &= ~IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e039fa4a | 69 | |
e6a9854b | 70 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
e039fa4a JB |
71 | rts_info->flags |= IEEE80211_TX_CTL_NO_ACK; |
72 | else | |
73 | rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK; | |
74 | ||
18ad01c4 JB |
75 | /* Disable hardware encryption */ |
76 | rts_info->control.hw_key = NULL; | |
2bb057d0 ID |
77 | |
78 | /* | |
79 | * RTS/CTS frame should use the length of the frame plus any | |
80 | * encryption overhead that will be added by the hardware. | |
81 | */ | |
7b40982e | 82 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); |
2bb057d0 | 83 | |
e6a9854b | 84 | if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
e039fa4a | 85 | ieee80211_ctstoself_get(rt2x00dev->hw, tx_info->control.vif, |
2bb057d0 | 86 | frag_skb->data, data_length, tx_info, |
95ea3627 ID |
87 | (struct ieee80211_cts *)(skb->data)); |
88 | else | |
e039fa4a | 89 | ieee80211_rts_get(rt2x00dev->hw, tx_info->control.vif, |
2bb057d0 | 90 | frag_skb->data, data_length, tx_info, |
95ea3627 ID |
91 | (struct ieee80211_rts *)(skb->data)); |
92 | ||
7351c6bd | 93 | retval = rt2x00queue_write_tx_frame(queue, skb, true); |
b9740c23 | 94 | if (retval) { |
e7087a82 | 95 | dev_kfree_skb_any(skb); |
95ea3627 | 96 | WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n"); |
95ea3627 ID |
97 | } |
98 | ||
b9740c23 | 99 | return retval; |
95ea3627 ID |
100 | } |
101 | ||
36323f81 TH |
102 | void rt2x00mac_tx(struct ieee80211_hw *hw, |
103 | struct ieee80211_tx_control *control, | |
104 | struct sk_buff *skb) | |
95ea3627 ID |
105 | { |
106 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
e039fa4a | 107 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
e2530083 | 108 | enum data_queue_qid qid = skb_get_queue_mapping(skb); |
0b7fde54 | 109 | struct data_queue *queue = NULL; |
95ea3627 | 110 | |
066cb637 ID |
111 | /* |
112 | * Mac80211 might be calling this function while we are trying | |
113 | * to remove the device or perhaps suspending it. | |
114 | * Note that we can only stop the TX queues inside the TX path | |
115 | * due to possible race conditions in mac80211. | |
116 | */ | |
0262ab0d | 117 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
00898a47 | 118 | goto exit_free_skb; |
066cb637 | 119 | |
95ea3627 | 120 | /* |
61c6e489 | 121 | * Use the ATIM queue if appropriate and present. |
95ea3627 | 122 | */ |
e039fa4a | 123 | if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
7dab73b3 | 124 | test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags)) |
61c6e489 GW |
125 | qid = QID_ATIM; |
126 | ||
127 | queue = rt2x00queue_get_tx_queue(rt2x00dev, qid); | |
181d6902 | 128 | if (unlikely(!queue)) { |
95ea3627 ID |
129 | ERROR(rt2x00dev, |
130 | "Attempt to send packet over invalid queue %d.\n" | |
e58c6aca | 131 | "Please file bug report to %s.\n", qid, DRV_PROJECT); |
00898a47 | 132 | goto exit_free_skb; |
95ea3627 ID |
133 | } |
134 | ||
135 | /* | |
772a249d ID |
136 | * If CTS/RTS is required. create and queue that frame first. |
137 | * Make sure we have at least enough entries available to send | |
138 | * this CTS/RTS frame as well as the data frame. | |
2d9ccf84 ID |
139 | * Note that when the driver has set the set_rts_threshold() |
140 | * callback function it doesn't need software generation of | |
772a249d | 141 | * either RTS or CTS-to-self frame and handles everything |
2d9ccf84 | 142 | * inside the hardware. |
95ea3627 | 143 | */ |
430df798 HS |
144 | if (!rt2x00dev->ops->hw->set_rts_threshold && |
145 | (tx_info->control.rates[0].flags & (IEEE80211_TX_RC_USE_RTS_CTS | | |
146 | IEEE80211_TX_RC_USE_CTS_PROTECT))) { | |
b9740c23 DW |
147 | if (rt2x00queue_available(queue) <= 1) |
148 | goto exit_fail; | |
95ea3627 | 149 | |
b9740c23 DW |
150 | if (rt2x00mac_tx_rts_cts(rt2x00dev, queue, skb)) |
151 | goto exit_fail; | |
1230cb83 ID |
152 | } |
153 | ||
208f19dc | 154 | if (unlikely(rt2x00queue_write_tx_frame(queue, skb, false))) |
b9740c23 DW |
155 | goto exit_fail; |
156 | ||
3780d038 SG |
157 | /* |
158 | * Pausing queue has to be serialized with rt2x00lib_txdone(). Note | |
159 | * we should not use spin_lock_bh variant as bottom halve was already | |
160 | * disabled before ieee80211_xmit() call. | |
161 | */ | |
162 | spin_lock(&queue->tx_lock); | |
b869767b | 163 | if (rt2x00queue_threshold(queue)) |
0b7fde54 | 164 | rt2x00queue_pause_queue(queue); |
3780d038 | 165 | spin_unlock(&queue->tx_lock); |
95ea3627 | 166 | |
7bb45683 | 167 | return; |
b9740c23 DW |
168 | |
169 | exit_fail: | |
3780d038 | 170 | spin_lock(&queue->tx_lock); |
62fe7784 | 171 | rt2x00queue_pause_queue(queue); |
3780d038 | 172 | spin_unlock(&queue->tx_lock); |
00898a47 | 173 | exit_free_skb: |
e4522ab1 | 174 | ieee80211_free_txskb(hw, skb); |
95ea3627 ID |
175 | } |
176 | EXPORT_SYMBOL_GPL(rt2x00mac_tx); | |
177 | ||
178 | int rt2x00mac_start(struct ieee80211_hw *hw) | |
179 | { | |
180 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 | 181 | |
0262ab0d | 182 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
183 | return 0; |
184 | ||
e37ea213 | 185 | return rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
186 | } |
187 | EXPORT_SYMBOL_GPL(rt2x00mac_start); | |
188 | ||
189 | void rt2x00mac_stop(struct ieee80211_hw *hw) | |
190 | { | |
191 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
192 | ||
0262ab0d | 193 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
066cb637 ID |
194 | return; |
195 | ||
e37ea213 | 196 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
197 | } |
198 | EXPORT_SYMBOL_GPL(rt2x00mac_stop); | |
199 | ||
200 | int rt2x00mac_add_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 201 | struct ieee80211_vif *vif) |
95ea3627 ID |
202 | { |
203 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
1ed32e4f | 204 | struct rt2x00_intf *intf = vif_to_intf(vif); |
a2440830 | 205 | struct data_queue *queue = rt2x00dev->bcn; |
6bb40dd1 ID |
206 | struct queue_entry *entry = NULL; |
207 | unsigned int i; | |
95ea3627 ID |
208 | |
209 | /* | |
6bb40dd1 ID |
210 | * Don't allow interfaces to be added |
211 | * the device has disappeared. | |
95ea3627 | 212 | */ |
0262ab0d ID |
213 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
214 | !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) | |
6bb40dd1 ID |
215 | return -ENODEV; |
216 | ||
6bb40dd1 ID |
217 | /* |
218 | * Loop through all beacon queues to find a free | |
219 | * entry. Since there are as much beacon entries | |
220 | * as the maximum interfaces, this search shouldn't | |
221 | * fail. | |
222 | */ | |
223 | for (i = 0; i < queue->limit; i++) { | |
224 | entry = &queue->entries[i]; | |
0262ab0d | 225 | if (!test_and_set_bit(ENTRY_BCN_ASSIGNED, &entry->flags)) |
6bb40dd1 ID |
226 | break; |
227 | } | |
228 | ||
229 | if (unlikely(i == queue->limit)) | |
95ea3627 ID |
230 | return -ENOBUFS; |
231 | ||
6bb40dd1 ID |
232 | /* |
233 | * We are now absolutely sure the interface can be created, | |
234 | * increase interface count and start initialization. | |
235 | */ | |
236 | ||
1ed32e4f | 237 | if (vif->type == NL80211_IFTYPE_AP) |
6bb40dd1 ID |
238 | rt2x00dev->intf_ap_count++; |
239 | else | |
240 | rt2x00dev->intf_sta_count++; | |
241 | ||
17512dc3 | 242 | mutex_init(&intf->beacon_skb_mutex); |
6bb40dd1 ID |
243 | intf->beacon = entry; |
244 | ||
95ea3627 | 245 | /* |
b595076a | 246 | * The MAC address must be configured after the device |
4150c572 JB |
247 | * has been initialized. Otherwise the device can reset |
248 | * the MAC registers. | |
06b3cda0 ID |
249 | * The BSSID address must only be configured in AP mode, |
250 | * however we should not send an empty BSSID address for | |
251 | * STA interfaces at this time, since this can cause | |
252 | * invalid behavior in the device. | |
95ea3627 | 253 | */ |
fa8b4b22 | 254 | rt2x00lib_config_intf(rt2x00dev, intf, vif->type, |
a39fd6be | 255 | vif->addr, NULL); |
95ea3627 | 256 | |
e0b005fa ID |
257 | /* |
258 | * Some filters depend on the current working mode. We can force | |
259 | * an update during the next configure_filter() run by mac80211 by | |
260 | * resetting the current packet_filter state. | |
261 | */ | |
262 | rt2x00dev->packet_filter = 0; | |
263 | ||
95ea3627 ID |
264 | return 0; |
265 | } | |
266 | EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); | |
267 | ||
268 | void rt2x00mac_remove_interface(struct ieee80211_hw *hw, | |
1ed32e4f | 269 | struct ieee80211_vif *vif) |
95ea3627 ID |
270 | { |
271 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
1ed32e4f | 272 | struct rt2x00_intf *intf = vif_to_intf(vif); |
95ea3627 ID |
273 | |
274 | /* | |
066cb637 ID |
275 | * Don't allow interfaces to be remove while |
276 | * either the device has disappeared or when | |
277 | * no interface is present. | |
95ea3627 | 278 | */ |
0262ab0d | 279 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
1ed32e4f JB |
280 | (vif->type == NL80211_IFTYPE_AP && !rt2x00dev->intf_ap_count) || |
281 | (vif->type != NL80211_IFTYPE_AP && !rt2x00dev->intf_sta_count)) | |
95ea3627 ID |
282 | return; |
283 | ||
1ed32e4f | 284 | if (vif->type == NL80211_IFTYPE_AP) |
6bb40dd1 ID |
285 | rt2x00dev->intf_ap_count--; |
286 | else | |
287 | rt2x00dev->intf_sta_count--; | |
288 | ||
289 | /* | |
290 | * Release beacon entry so it is available for | |
291 | * new interfaces again. | |
292 | */ | |
0262ab0d | 293 | clear_bit(ENTRY_BCN_ASSIGNED, &intf->beacon->flags); |
95ea3627 ID |
294 | |
295 | /* | |
296 | * Make sure the bssid and mac address registers | |
297 | * are cleared to prevent false ACKing of frames. | |
298 | */ | |
6bb40dd1 | 299 | rt2x00lib_config_intf(rt2x00dev, intf, |
05c914fe | 300 | NL80211_IFTYPE_UNSPECIFIED, NULL, NULL); |
95ea3627 ID |
301 | } |
302 | EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); | |
303 | ||
e8975581 | 304 | int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed) |
95ea3627 ID |
305 | { |
306 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
e8975581 | 307 | struct ieee80211_conf *conf = &hw->conf; |
95ea3627 ID |
308 | |
309 | /* | |
49513481 | 310 | * mac80211 might be calling this function while we are trying |
066cb637 | 311 | * to remove the device or perhaps suspending it. |
95ea3627 | 312 | */ |
0262ab0d | 313 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
314 | return 0; |
315 | ||
316 | /* | |
bdfa500b ID |
317 | * Some configuration parameters (e.g. channel and antenna values) can |
318 | * only be set when the radio is enabled, but do require the RX to | |
d8147f9d ID |
319 | * be off. During this period we should keep link tuning enabled, |
320 | * if for any reason the link tuner must be reset, this will be | |
321 | * handled by rt2x00lib_config(). | |
95ea3627 | 322 | */ |
0b7fde54 | 323 | rt2x00queue_stop_queue(rt2x00dev->rx); |
95ea3627 | 324 | |
bdfa500b ID |
325 | /* |
326 | * When we've just turned on the radio, we want to reprogram | |
327 | * everything to ensure a consistent state | |
328 | */ | |
329 | rt2x00lib_config(rt2x00dev, conf, changed); | |
74c0ee9b | 330 | |
bdfa500b ID |
331 | /* |
332 | * After the radio has been enabled we need to configure | |
333 | * the antenna to the default settings. rt2x00lib_config_antenna() | |
334 | * should determine if any action should be taken based on | |
335 | * checking if diversity has been enabled or no antenna changes | |
336 | * have been made since the last configuration change. | |
337 | */ | |
338 | rt2x00lib_config_antenna(rt2x00dev, rt2x00dev->default_ant); | |
95ea3627 | 339 | |
bdfa500b | 340 | /* Turn RX back on */ |
0b7fde54 | 341 | rt2x00queue_start_queue(rt2x00dev->rx); |
95ea3627 ID |
342 | |
343 | return 0; | |
344 | } | |
345 | EXPORT_SYMBOL_GPL(rt2x00mac_config); | |
346 | ||
3a643d24 ID |
347 | void rt2x00mac_configure_filter(struct ieee80211_hw *hw, |
348 | unsigned int changed_flags, | |
349 | unsigned int *total_flags, | |
3ac64bee | 350 | u64 multicast) |
3a643d24 ID |
351 | { |
352 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
353 | ||
354 | /* | |
355 | * Mask off any flags we are going to ignore | |
356 | * from the total_flags field. | |
357 | */ | |
358 | *total_flags &= | |
359 | FIF_ALLMULTI | | |
360 | FIF_FCSFAIL | | |
361 | FIF_PLCPFAIL | | |
362 | FIF_CONTROL | | |
1afcfd54 | 363 | FIF_PSPOLL | |
3a643d24 ID |
364 | FIF_OTHER_BSS | |
365 | FIF_PROMISC_IN_BSS; | |
366 | ||
367 | /* | |
368 | * Apply some rules to the filters: | |
369 | * - Some filters imply different filters to be set. | |
370 | * - Some things we can't filter out at all. | |
371 | * - Multicast filter seems to kill broadcast traffic so never use it. | |
372 | */ | |
373 | *total_flags |= FIF_ALLMULTI; | |
374 | if (*total_flags & FIF_OTHER_BSS || | |
375 | *total_flags & FIF_PROMISC_IN_BSS) | |
376 | *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS; | |
377 | ||
1afcfd54 IP |
378 | /* |
379 | * If the device has a single filter for all control frames, | |
380 | * FIF_CONTROL and FIF_PSPOLL flags imply each other. | |
381 | * And if the device has more than one filter for control frames | |
382 | * of different types, but has no a separate filter for PS Poll frames, | |
383 | * FIF_CONTROL flag implies FIF_PSPOLL. | |
384 | */ | |
7dab73b3 | 385 | if (!test_bit(CAPABILITY_CONTROL_FILTERS, &rt2x00dev->cap_flags)) { |
1afcfd54 IP |
386 | if (*total_flags & FIF_CONTROL || *total_flags & FIF_PSPOLL) |
387 | *total_flags |= FIF_CONTROL | FIF_PSPOLL; | |
388 | } | |
7dab73b3 | 389 | if (!test_bit(CAPABILITY_CONTROL_FILTER_PSPOLL, &rt2x00dev->cap_flags)) { |
1afcfd54 IP |
390 | if (*total_flags & FIF_CONTROL) |
391 | *total_flags |= FIF_PSPOLL; | |
392 | } | |
393 | ||
3a643d24 ID |
394 | /* |
395 | * Check if there is any work left for us. | |
396 | */ | |
397 | if (rt2x00dev->packet_filter == *total_flags) | |
398 | return; | |
399 | rt2x00dev->packet_filter = *total_flags; | |
400 | ||
afa62042 | 401 | rt2x00dev->ops->lib->config_filter(rt2x00dev, *total_flags); |
3a643d24 ID |
402 | } |
403 | EXPORT_SYMBOL_GPL(rt2x00mac_configure_filter); | |
404 | ||
4dee32f5 HS |
405 | static void rt2x00mac_set_tim_iter(void *data, u8 *mac, |
406 | struct ieee80211_vif *vif) | |
407 | { | |
408 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
409 | ||
410 | if (vif->type != NL80211_IFTYPE_AP && | |
411 | vif->type != NL80211_IFTYPE_ADHOC && | |
412 | vif->type != NL80211_IFTYPE_MESH_POINT && | |
413 | vif->type != NL80211_IFTYPE_WDS) | |
414 | return; | |
415 | ||
bfe6a15d | 416 | set_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags); |
4dee32f5 HS |
417 | } |
418 | ||
ad2f34b4 ID |
419 | int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
420 | bool set) | |
421 | { | |
422 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
423 | ||
4dee32f5 HS |
424 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
425 | return 0; | |
426 | ||
427 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, | |
428 | rt2x00mac_set_tim_iter, | |
429 | rt2x00dev); | |
430 | ||
431 | /* queue work to upodate the beacon template */ | |
432 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); | |
ad2f34b4 ID |
433 | return 0; |
434 | } | |
435 | EXPORT_SYMBOL_GPL(rt2x00mac_set_tim); | |
436 | ||
2bb057d0 | 437 | #ifdef CONFIG_RT2X00_LIB_CRYPTO |
7b40982e ID |
438 | static void memcpy_tkip(struct rt2x00lib_crypto *crypto, u8 *key, u8 key_len) |
439 | { | |
440 | if (key_len > NL80211_TKIP_DATA_OFFSET_ENCR_KEY) | |
736e3aca | 441 | memcpy(crypto->key, |
7b40982e ID |
442 | &key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY], |
443 | sizeof(crypto->key)); | |
444 | ||
445 | if (key_len > NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY) | |
736e3aca | 446 | memcpy(crypto->tx_mic, |
7b40982e ID |
447 | &key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], |
448 | sizeof(crypto->tx_mic)); | |
449 | ||
450 | if (key_len > NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY) | |
736e3aca | 451 | memcpy(crypto->rx_mic, |
7b40982e ID |
452 | &key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], |
453 | sizeof(crypto->rx_mic)); | |
454 | } | |
455 | ||
2bb057d0 | 456 | int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
dc822b5d | 457 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
2bb057d0 ID |
458 | struct ieee80211_key_conf *key) |
459 | { | |
460 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
461 | int (*set_key) (struct rt2x00_dev *rt2x00dev, | |
462 | struct rt2x00lib_crypto *crypto, | |
463 | struct ieee80211_key_conf *key); | |
464 | struct rt2x00lib_crypto crypto; | |
dc822b5d JB |
465 | static const u8 bcast_addr[ETH_ALEN] = |
466 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; | |
f03fcfc1 | 467 | struct rt2x00_sta *sta_priv = NULL; |
2bb057d0 | 468 | |
8058409c ID |
469 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
470 | return 0; | |
6851dff3 SG |
471 | |
472 | if (!test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags)) | |
473 | return -EOPNOTSUPP; | |
474 | ||
475 | /* | |
476 | * To support IBSS RSN, don't program group keys in IBSS, the | |
477 | * hardware will then not attempt to decrypt the frames. | |
478 | */ | |
479 | if (vif->type == NL80211_IFTYPE_ADHOC && | |
480 | !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
2bb057d0 | 481 | return -EOPNOTSUPP; |
6851dff3 SG |
482 | |
483 | if (key->keylen > 32) | |
2bb057d0 ID |
484 | return -ENOSPC; |
485 | ||
486 | memset(&crypto, 0, sizeof(crypto)); | |
487 | ||
18325523 | 488 | crypto.bssidx = rt2x00lib_get_bssidx(rt2x00dev, vif); |
2bb057d0 ID |
489 | crypto.cipher = rt2x00crypto_key_to_cipher(key); |
490 | if (crypto.cipher == CIPHER_NONE) | |
491 | return -EOPNOTSUPP; | |
492 | ||
493 | crypto.cmd = cmd; | |
dc822b5d | 494 | |
f03fcfc1 | 495 | if (sta) { |
dc822b5d | 496 | crypto.address = sta->addr; |
f03fcfc1 HS |
497 | sta_priv = sta_to_rt2x00_sta(sta); |
498 | crypto.wcid = sta_priv->wcid; | |
499 | } else | |
dc822b5d | 500 | crypto.address = bcast_addr; |
2bb057d0 | 501 | |
7b40982e ID |
502 | if (crypto.cipher == CIPHER_TKIP) |
503 | memcpy_tkip(&crypto, &key->key[0], key->keylen); | |
504 | else | |
736e3aca | 505 | memcpy(crypto.key, &key->key[0], key->keylen); |
2bb057d0 ID |
506 | /* |
507 | * Each BSS has a maximum of 4 shared keys. | |
508 | * Shared key index values: | |
509 | * 0) BSS0 key0 | |
510 | * 1) BSS0 key1 | |
511 | * ... | |
512 | * 4) BSS1 key0 | |
513 | * ... | |
514 | * 8) BSS2 key0 | |
515 | * ... | |
516 | * Both pairwise as shared key indeces are determined by | |
517 | * driver. This is required because the hardware requires | |
518 | * keys to be assigned in correct order (When key 1 is | |
519 | * provided but key 0 is not, then the key is not found | |
520 | * by the hardware during RX). | |
521 | */ | |
acaf908d ID |
522 | if (cmd == SET_KEY) |
523 | key->hw_key_idx = 0; | |
2bb057d0 ID |
524 | |
525 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) | |
526 | set_key = rt2x00dev->ops->lib->config_pairwise_key; | |
527 | else | |
528 | set_key = rt2x00dev->ops->lib->config_shared_key; | |
529 | ||
530 | if (!set_key) | |
531 | return -EOPNOTSUPP; | |
532 | ||
533 | return set_key(rt2x00dev, &crypto, key); | |
534 | } | |
535 | EXPORT_SYMBOL_GPL(rt2x00mac_set_key); | |
536 | #endif /* CONFIG_RT2X00_LIB_CRYPTO */ | |
537 | ||
b4943d81 HS |
538 | int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
539 | struct ieee80211_sta *sta) | |
540 | { | |
541 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
542 | struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta); | |
543 | ||
544 | /* | |
545 | * If there's no space left in the device table store | |
546 | * -1 as wcid but tell mac80211 everything went ok. | |
547 | */ | |
548 | if (rt2x00dev->ops->lib->sta_add(rt2x00dev, vif, sta)) | |
549 | sta_priv->wcid = -1; | |
550 | ||
551 | return 0; | |
552 | } | |
553 | EXPORT_SYMBOL_GPL(rt2x00mac_sta_add); | |
554 | ||
555 | int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, | |
556 | struct ieee80211_sta *sta) | |
557 | { | |
558 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
559 | struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta); | |
560 | ||
561 | /* | |
562 | * If we never sent the STA to the device no need to clean it up. | |
563 | */ | |
564 | if (sta_priv->wcid < 0) | |
565 | return 0; | |
566 | ||
567 | return rt2x00dev->ops->lib->sta_remove(rt2x00dev, sta_priv->wcid); | |
568 | } | |
569 | EXPORT_SYMBOL_GPL(rt2x00mac_sta_remove); | |
570 | ||
d8147f9d ID |
571 | void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw) |
572 | { | |
573 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
7dab73b3 | 574 | set_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
d8147f9d ID |
575 | rt2x00link_stop_tuner(rt2x00dev); |
576 | } | |
577 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_start); | |
578 | ||
579 | void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw) | |
580 | { | |
581 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
7dab73b3 | 582 | clear_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags); |
d8147f9d ID |
583 | rt2x00link_start_tuner(rt2x00dev); |
584 | } | |
585 | EXPORT_SYMBOL_GPL(rt2x00mac_sw_scan_complete); | |
586 | ||
95ea3627 ID |
587 | int rt2x00mac_get_stats(struct ieee80211_hw *hw, |
588 | struct ieee80211_low_level_stats *stats) | |
589 | { | |
590 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
591 | ||
592 | /* | |
593 | * The dot11ACKFailureCount, dot11RTSFailureCount and | |
594 | * dot11RTSSuccessCount are updated in interrupt time. | |
595 | * dot11FCSErrorCount is updated in the link tuner. | |
596 | */ | |
597 | memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); | |
602 | ||
471b3efd JB |
603 | void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, |
604 | struct ieee80211_vif *vif, | |
605 | struct ieee80211_bss_conf *bss_conf, | |
606 | u32 changes) | |
5c58ee51 ID |
607 | { |
608 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
6bb40dd1 | 609 | struct rt2x00_intf *intf = vif_to_intf(vif); |
2d0ddec5 JB |
610 | |
611 | /* | |
49513481 | 612 | * mac80211 might be calling this function while we are trying |
2d0ddec5 JB |
613 | * to remove the device or perhaps suspending it. |
614 | */ | |
615 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
616 | return; | |
617 | ||
2d0ddec5 | 618 | /* |
5af3c1d1 | 619 | * Update the BSSID. |
2d0ddec5 JB |
620 | */ |
621 | if (changes & BSS_CHANGED_BSSID) | |
622 | rt2x00lib_config_intf(rt2x00dev, intf, vif->type, NULL, | |
1ed7a17a | 623 | bss_conf->bssid); |
2d0ddec5 JB |
624 | |
625 | /* | |
1dae8d34 HS |
626 | * Update the beacon. This is only required on USB devices. PCI |
627 | * devices fetch beacons periodically. | |
2d0ddec5 | 628 | */ |
1dae8d34 | 629 | if (changes & BSS_CHANGED_BEACON && rt2x00_is_usb(rt2x00dev)) |
69cf36a4 HS |
630 | rt2x00queue_update_beacon(rt2x00dev, vif); |
631 | ||
632 | /* | |
633 | * Start/stop beaconing. | |
634 | */ | |
635 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
636 | if (!bss_conf->enable_beacon && intf->enable_beacon) { | |
637 | rt2x00queue_clear_beacon(rt2x00dev, vif); | |
638 | rt2x00dev->intf_beaconing--; | |
639 | intf->enable_beacon = false; | |
640 | ||
641 | if (rt2x00dev->intf_beaconing == 0) { | |
642 | /* | |
643 | * Last beaconing interface disabled | |
644 | * -> stop beacon queue. | |
645 | */ | |
646 | mutex_lock(&intf->beacon_skb_mutex); | |
647 | rt2x00queue_stop_queue(rt2x00dev->bcn); | |
648 | mutex_unlock(&intf->beacon_skb_mutex); | |
649 | } | |
650 | ||
651 | ||
652 | } else if (bss_conf->enable_beacon && !intf->enable_beacon) { | |
653 | rt2x00dev->intf_beaconing++; | |
654 | intf->enable_beacon = true; | |
655 | ||
656 | if (rt2x00dev->intf_beaconing == 1) { | |
657 | /* | |
658 | * First beaconing interface enabled | |
659 | * -> start beacon queue. | |
660 | */ | |
661 | mutex_lock(&intf->beacon_skb_mutex); | |
662 | rt2x00queue_start_queue(rt2x00dev->bcn); | |
663 | mutex_unlock(&intf->beacon_skb_mutex); | |
664 | } | |
665 | } | |
666 | } | |
5c58ee51 ID |
667 | |
668 | /* | |
6bb40dd1 ID |
669 | * When the association status has changed we must reset the link |
670 | * tuner counter. This is because some drivers determine if they | |
671 | * should perform link tuning based on the number of seconds | |
672 | * while associated or not associated. | |
5c58ee51 | 673 | */ |
6bb40dd1 ID |
674 | if (changes & BSS_CHANGED_ASSOC) { |
675 | rt2x00dev->link.count = 0; | |
5c58ee51 | 676 | |
6bb40dd1 ID |
677 | if (bss_conf->assoc) |
678 | rt2x00dev->intf_associated++; | |
679 | else | |
680 | rt2x00dev->intf_associated--; | |
a2e1d52a | 681 | |
d904dc17 | 682 | rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated); |
e66a8ddf SG |
683 | |
684 | clear_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); | |
6bb40dd1 | 685 | } |
5c58ee51 | 686 | |
e66a8ddf SG |
687 | /* |
688 | * Check for access point which do not support 802.11e . We have to | |
689 | * generate data frames sequence number in S/W for such AP, because | |
690 | * of H/W bug. | |
691 | */ | |
692 | if (changes & BSS_CHANGED_QOS && !bss_conf->qos) | |
693 | set_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags); | |
694 | ||
6bb40dd1 | 695 | /* |
72810379 ID |
696 | * When the erp information has changed, we should perform |
697 | * additional configuration steps. For all other changes we are done. | |
6bb40dd1 | 698 | */ |
02044643 HS |
699 | if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE | |
700 | BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BASIC_RATES | | |
87c1915d | 701 | BSS_CHANGED_BEACON_INT | BSS_CHANGED_HT)) |
02044643 | 702 | rt2x00lib_config_erp(rt2x00dev, intf, bss_conf, changes); |
5c58ee51 | 703 | } |
471b3efd | 704 | EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |
5c58ee51 | 705 | |
8a3a3c85 EP |
706 | int rt2x00mac_conf_tx(struct ieee80211_hw *hw, |
707 | struct ieee80211_vif *vif, u16 queue_idx, | |
95ea3627 ID |
708 | const struct ieee80211_tx_queue_params *params) |
709 | { | |
710 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
181d6902 | 711 | struct data_queue *queue; |
95ea3627 | 712 | |
11f818e0 | 713 | queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx); |
181d6902 | 714 | if (unlikely(!queue)) |
95ea3627 ID |
715 | return -EINVAL; |
716 | ||
717 | /* | |
718 | * The passed variables are stored as real value ((2^n)-1). | |
719 | * Ralink registers require to know the bit number 'n'. | |
720 | */ | |
3b3618ad | 721 | if (params->cw_min > 0) |
181d6902 | 722 | queue->cw_min = fls(params->cw_min); |
95ea3627 | 723 | else |
181d6902 | 724 | queue->cw_min = 5; /* cw_min: 2^5 = 32. */ |
95ea3627 | 725 | |
3b3618ad | 726 | if (params->cw_max > 0) |
181d6902 | 727 | queue->cw_max = fls(params->cw_max); |
95ea3627 | 728 | else |
181d6902 | 729 | queue->cw_max = 10; /* cw_min: 2^10 = 1024. */ |
95ea3627 | 730 | |
0b57664c | 731 | queue->aifs = params->aifs; |
2af0a570 | 732 | queue->txop = params->txop; |
95ea3627 ID |
733 | |
734 | INFO(rt2x00dev, | |
2af0a570 ID |
735 | "Configured TX queue %d - CWmin: %d, CWmax: %d, Aifs: %d, TXop: %d.\n", |
736 | queue_idx, queue->cw_min, queue->cw_max, queue->aifs, queue->txop); | |
95ea3627 ID |
737 | |
738 | return 0; | |
739 | } | |
740 | EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); | |
e47a5cdd ID |
741 | |
742 | void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw) | |
743 | { | |
744 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
73077c85 | 745 | bool active = !!rt2x00dev->ops->lib->rfkill_poll(rt2x00dev); |
e47a5cdd | 746 | |
73077c85 | 747 | wiphy_rfkill_set_hw_state(hw->wiphy, !active); |
e47a5cdd ID |
748 | } |
749 | EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll); | |
f44df18c ID |
750 | |
751 | void rt2x00mac_flush(struct ieee80211_hw *hw, bool drop) | |
752 | { | |
753 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
754 | struct data_queue *queue; | |
f44df18c | 755 | |
5be65609 ID |
756 | tx_queue_for_each(rt2x00dev, queue) |
757 | rt2x00queue_flush_queue(queue, drop); | |
f44df18c ID |
758 | } |
759 | EXPORT_SYMBOL_GPL(rt2x00mac_flush); | |
e7dee444 | 760 | |
0ed7b3c0 ID |
761 | int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) |
762 | { | |
763 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
764 | struct link_ant *ant = &rt2x00dev->link.ant; | |
765 | struct antenna_setup *def = &rt2x00dev->default_ant; | |
766 | struct antenna_setup setup; | |
767 | ||
768 | // The antenna value is not supposed to be 0, | |
769 | // or exceed the maximum number of antenna's. | |
770 | if (!tx_ant || (tx_ant & ~3) || !rx_ant || (rx_ant & ~3)) | |
771 | return -EINVAL; | |
772 | ||
773 | // When the client tried to configure the antenna to or from | |
774 | // diversity mode, we must reset the default antenna as well | |
775 | // as that controls the diversity switch. | |
776 | if (ant->flags & ANTENNA_TX_DIVERSITY && tx_ant != 3) | |
777 | ant->flags &= ~ANTENNA_TX_DIVERSITY; | |
778 | if (ant->flags & ANTENNA_RX_DIVERSITY && rx_ant != 3) | |
779 | ant->flags &= ~ANTENNA_RX_DIVERSITY; | |
780 | ||
781 | // If diversity is being enabled, check if we need hardware | |
782 | // or software diversity. In the latter case, reset the value, | |
783 | // and make sure we update the antenna flags to have the | |
784 | // link tuner pick up the diversity tuning. | |
785 | if (tx_ant == 3 && def->tx == ANTENNA_SW_DIVERSITY) { | |
786 | tx_ant = ANTENNA_SW_DIVERSITY; | |
787 | ant->flags |= ANTENNA_TX_DIVERSITY; | |
788 | } | |
789 | ||
790 | if (rx_ant == 3 && def->rx == ANTENNA_SW_DIVERSITY) { | |
791 | rx_ant = ANTENNA_SW_DIVERSITY; | |
792 | ant->flags |= ANTENNA_RX_DIVERSITY; | |
793 | } | |
794 | ||
795 | setup.tx = tx_ant; | |
796 | setup.rx = rx_ant; | |
797 | ||
798 | rt2x00lib_config_antenna(rt2x00dev, setup); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | EXPORT_SYMBOL_GPL(rt2x00mac_set_antenna); | |
803 | ||
804 | int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) | |
805 | { | |
806 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
807 | struct link_ant *ant = &rt2x00dev->link.ant; | |
808 | struct antenna_setup *active = &rt2x00dev->link.ant.active; | |
809 | ||
810 | // When software diversity is active, we must report this to the | |
811 | // client and not the current active antenna state. | |
812 | if (ant->flags & ANTENNA_TX_DIVERSITY) | |
813 | *tx_ant = ANTENNA_HW_DIVERSITY; | |
814 | else | |
815 | *tx_ant = active->tx; | |
816 | ||
817 | if (ant->flags & ANTENNA_RX_DIVERSITY) | |
818 | *rx_ant = ANTENNA_HW_DIVERSITY; | |
819 | else | |
820 | *rx_ant = active->rx; | |
821 | ||
822 | return 0; | |
823 | } | |
824 | EXPORT_SYMBOL_GPL(rt2x00mac_get_antenna); | |
825 | ||
e7dee444 ID |
826 | void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, |
827 | u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max) | |
828 | { | |
829 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
830 | struct data_queue *queue; | |
831 | ||
832 | tx_queue_for_each(rt2x00dev, queue) { | |
833 | *tx += queue->length; | |
834 | *tx_max += queue->limit; | |
835 | } | |
836 | ||
837 | *rx = rt2x00dev->rx->length; | |
838 | *rx_max = rt2x00dev->rx->limit; | |
839 | } | |
840 | EXPORT_SYMBOL_GPL(rt2x00mac_get_ringparam); | |
5f0dd296 GW |
841 | |
842 | bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw) | |
843 | { | |
844 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
845 | struct data_queue *queue; | |
846 | ||
847 | tx_queue_for_each(rt2x00dev, queue) { | |
848 | if (!rt2x00queue_empty(queue)) | |
849 | return true; | |
850 | } | |
851 | ||
852 | return false; | |
853 | } | |
854 | EXPORT_SYMBOL_GPL(rt2x00mac_tx_frames_pending); |