Commit | Line | Data |
---|---|---|
95ea3627 ID |
1 | /* |
2 | Copyright (C) 2004 - 2007 rt2x00 SourceForge Project | |
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, | |
33 | struct data_ring *ring, | |
34 | struct sk_buff *frag_skb, | |
35 | struct ieee80211_tx_control *control) | |
36 | { | |
37 | struct sk_buff *skb; | |
38 | int size; | |
39 | ||
40 | if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) | |
41 | size = sizeof(struct ieee80211_cts); | |
42 | else | |
43 | size = sizeof(struct ieee80211_rts); | |
44 | ||
45 | skb = dev_alloc_skb(size + rt2x00dev->hw->extra_tx_headroom); | |
46 | if (!skb) { | |
47 | WARNING(rt2x00dev, "Failed to create RTS/CTS frame.\n"); | |
48 | return NETDEV_TX_BUSY; | |
49 | } | |
50 | ||
51 | skb_reserve(skb, rt2x00dev->hw->extra_tx_headroom); | |
52 | skb_put(skb, size); | |
53 | ||
54 | if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) | |
55 | ieee80211_ctstoself_get(rt2x00dev->hw, rt2x00dev->interface.id, | |
56 | frag_skb->data, frag_skb->len, control, | |
57 | (struct ieee80211_cts *)(skb->data)); | |
58 | else | |
59 | ieee80211_rts_get(rt2x00dev->hw, rt2x00dev->interface.id, | |
60 | frag_skb->data, frag_skb->len, control, | |
61 | (struct ieee80211_rts *)(skb->data)); | |
62 | ||
63 | if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) { | |
64 | WARNING(rt2x00dev, "Failed to send RTS/CTS frame.\n"); | |
65 | return NETDEV_TX_BUSY; | |
66 | } | |
67 | ||
68 | return NETDEV_TX_OK; | |
69 | } | |
70 | ||
71 | int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
72 | struct ieee80211_tx_control *control) | |
73 | { | |
74 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
75 | struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data; | |
76 | struct data_ring *ring; | |
77 | u16 frame_control; | |
78 | ||
066cb637 ID |
79 | /* |
80 | * Mac80211 might be calling this function while we are trying | |
81 | * to remove the device or perhaps suspending it. | |
82 | * Note that we can only stop the TX queues inside the TX path | |
83 | * due to possible race conditions in mac80211. | |
84 | */ | |
85 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) { | |
86 | ieee80211_stop_queues(hw); | |
1230cb83 | 87 | return NETDEV_TX_OK; |
066cb637 ID |
88 | } |
89 | ||
95ea3627 ID |
90 | /* |
91 | * Determine which ring to put packet on. | |
92 | */ | |
93 | ring = rt2x00lib_get_ring(rt2x00dev, control->queue); | |
94 | if (unlikely(!ring)) { | |
95 | ERROR(rt2x00dev, | |
96 | "Attempt to send packet over invalid queue %d.\n" | |
97 | "Please file bug report to %s.\n", | |
98 | control->queue, DRV_PROJECT); | |
99 | dev_kfree_skb_any(skb); | |
100 | return NETDEV_TX_OK; | |
101 | } | |
102 | ||
103 | /* | |
104 | * If CTS/RTS is required. and this frame is not CTS or RTS, | |
105 | * create and queue that frame first. But make sure we have | |
106 | * at least enough entries available to send this CTS/RTS | |
107 | * frame as well as the data frame. | |
108 | */ | |
109 | frame_control = le16_to_cpu(ieee80211hdr->frame_control); | |
110 | if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) && | |
111 | (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS | | |
112 | IEEE80211_TXCTL_USE_CTS_PROTECT))) { | |
1230cb83 ID |
113 | if (rt2x00_ring_free(ring) <= 1) { |
114 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); | |
95ea3627 | 115 | return NETDEV_TX_BUSY; |
1230cb83 | 116 | } |
95ea3627 | 117 | |
1230cb83 ID |
118 | if (rt2x00mac_tx_rts_cts(rt2x00dev, ring, skb, control)) { |
119 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); | |
95ea3627 | 120 | return NETDEV_TX_BUSY; |
1230cb83 | 121 | } |
95ea3627 ID |
122 | } |
123 | ||
1230cb83 ID |
124 | if (rt2x00dev->ops->lib->write_tx_data(rt2x00dev, ring, skb, control)) { |
125 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); | |
95ea3627 | 126 | return NETDEV_TX_BUSY; |
1230cb83 ID |
127 | } |
128 | ||
129 | if (rt2x00_ring_full(ring)) | |
130 | ieee80211_stop_queue(rt2x00dev->hw, control->queue); | |
95ea3627 ID |
131 | |
132 | if (rt2x00dev->ops->lib->kick_tx_queue) | |
133 | rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue); | |
134 | ||
135 | return NETDEV_TX_OK; | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(rt2x00mac_tx); | |
138 | ||
139 | int rt2x00mac_start(struct ieee80211_hw *hw) | |
140 | { | |
141 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 | 142 | |
e37ea213 | 143 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
144 | return 0; |
145 | ||
e37ea213 | 146 | return rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
147 | } |
148 | EXPORT_SYMBOL_GPL(rt2x00mac_start); | |
149 | ||
150 | void rt2x00mac_stop(struct ieee80211_hw *hw) | |
151 | { | |
152 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
153 | ||
066cb637 ID |
154 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) |
155 | return; | |
156 | ||
e37ea213 | 157 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
158 | } |
159 | EXPORT_SYMBOL_GPL(rt2x00mac_stop); | |
160 | ||
161 | int rt2x00mac_add_interface(struct ieee80211_hw *hw, | |
162 | struct ieee80211_if_init_conf *conf) | |
163 | { | |
164 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
165 | struct interface *intf = &rt2x00dev->interface; | |
95ea3627 | 166 | |
453a3fb9 ID |
167 | /* FIXME: Beaconing is broken in rt2x00. */ |
168 | if (conf->type == IEEE80211_IF_TYPE_IBSS || | |
169 | conf->type == IEEE80211_IF_TYPE_AP) { | |
170 | ERROR(rt2x00dev, | |
171 | "rt2x00 does not support Adhoc or Master mode"); | |
172 | return -EOPNOTSUPP; | |
173 | } | |
174 | ||
95ea3627 | 175 | /* |
066cb637 ID |
176 | * Don't allow interfaces to be added while |
177 | * either the device has disappeared or when | |
178 | * another interface is already present. | |
95ea3627 | 179 | */ |
066cb637 ID |
180 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) || |
181 | is_interface_present(intf)) | |
95ea3627 ID |
182 | return -ENOBUFS; |
183 | ||
32bfd35d | 184 | intf->id = conf->vif; |
4150c572 JB |
185 | intf->type = conf->type; |
186 | if (conf->type == IEEE80211_IF_TYPE_AP) | |
187 | memcpy(&intf->bssid, conf->mac_addr, ETH_ALEN); | |
188 | memcpy(&intf->mac, conf->mac_addr, ETH_ALEN); | |
95ea3627 ID |
189 | |
190 | /* | |
95ea3627 | 191 | * The MAC adddress must be configured after the device |
4150c572 JB |
192 | * has been initialized. Otherwise the device can reset |
193 | * the MAC registers. | |
95ea3627 ID |
194 | */ |
195 | rt2x00lib_config_mac_addr(rt2x00dev, intf->mac); | |
196 | rt2x00lib_config_type(rt2x00dev, conf->type); | |
95ea3627 ID |
197 | |
198 | return 0; | |
199 | } | |
200 | EXPORT_SYMBOL_GPL(rt2x00mac_add_interface); | |
201 | ||
202 | void rt2x00mac_remove_interface(struct ieee80211_hw *hw, | |
203 | struct ieee80211_if_init_conf *conf) | |
204 | { | |
205 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
206 | struct interface *intf = &rt2x00dev->interface; | |
207 | ||
208 | /* | |
066cb637 ID |
209 | * Don't allow interfaces to be remove while |
210 | * either the device has disappeared or when | |
211 | * no interface is present. | |
95ea3627 | 212 | */ |
066cb637 ID |
213 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) || |
214 | !is_interface_present(intf)) | |
95ea3627 ID |
215 | return; |
216 | ||
4150c572 | 217 | intf->id = 0; |
d28c2561 | 218 | intf->type = IEEE80211_IF_TYPE_INVALID; |
4150c572 JB |
219 | memset(&intf->bssid, 0x00, ETH_ALEN); |
220 | memset(&intf->mac, 0x00, ETH_ALEN); | |
95ea3627 ID |
221 | |
222 | /* | |
223 | * Make sure the bssid and mac address registers | |
224 | * are cleared to prevent false ACKing of frames. | |
225 | */ | |
226 | rt2x00lib_config_mac_addr(rt2x00dev, intf->mac); | |
227 | rt2x00lib_config_bssid(rt2x00dev, intf->bssid); | |
228 | rt2x00lib_config_type(rt2x00dev, intf->type); | |
95ea3627 ID |
229 | } |
230 | EXPORT_SYMBOL_GPL(rt2x00mac_remove_interface); | |
231 | ||
232 | int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf) | |
233 | { | |
234 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
235 | ||
236 | /* | |
066cb637 ID |
237 | * Mac80211 might be calling this function while we are trying |
238 | * to remove the device or perhaps suspending it. | |
95ea3627 | 239 | */ |
066cb637 | 240 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
241 | return 0; |
242 | ||
243 | /* | |
244 | * Check if we need to disable the radio, | |
245 | * if this is not the case, at least the RX must be disabled. | |
246 | */ | |
247 | if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) { | |
248 | if (!conf->radio_enabled) | |
249 | rt2x00lib_disable_radio(rt2x00dev); | |
250 | else | |
5cbf830e | 251 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
252 | } |
253 | ||
066cb637 | 254 | rt2x00lib_config(rt2x00dev, conf, 0); |
95ea3627 | 255 | |
95ea3627 ID |
256 | /* |
257 | * Reenable RX only if the radio should be on. | |
258 | */ | |
259 | if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
5cbf830e | 260 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
261 | else if (conf->radio_enabled) |
262 | return rt2x00lib_enable_radio(rt2x00dev); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | EXPORT_SYMBOL_GPL(rt2x00mac_config); | |
267 | ||
32bfd35d JB |
268 | int rt2x00mac_config_interface(struct ieee80211_hw *hw, |
269 | struct ieee80211_vif *vif, | |
95ea3627 ID |
270 | struct ieee80211_if_conf *conf) |
271 | { | |
272 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
273 | struct interface *intf = &rt2x00dev->interface; | |
274 | int status; | |
275 | ||
276 | /* | |
066cb637 ID |
277 | * Mac80211 might be calling this function while we are trying |
278 | * to remove the device or perhaps suspending it. | |
95ea3627 | 279 | */ |
066cb637 | 280 | if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) |
95ea3627 ID |
281 | return 0; |
282 | ||
283 | /* | |
95ea3627 ID |
284 | * If the given type does not match the configured type, |
285 | * there has been a problem. | |
286 | */ | |
4150c572 | 287 | if (conf->type != intf->type) |
95ea3627 ID |
288 | return -EINVAL; |
289 | ||
290 | /* | |
291 | * If the interface does not work in master mode, | |
292 | * then the bssid value in the interface structure | |
293 | * should now be set. | |
294 | */ | |
295 | if (conf->type != IEEE80211_IF_TYPE_AP) | |
296 | memcpy(&intf->bssid, conf->bssid, ETH_ALEN); | |
297 | rt2x00lib_config_bssid(rt2x00dev, intf->bssid); | |
298 | ||
299 | /* | |
300 | * We only need to initialize the beacon when master mode is enabled. | |
301 | */ | |
302 | if (conf->type != IEEE80211_IF_TYPE_AP || !conf->beacon) | |
303 | return 0; | |
304 | ||
305 | status = rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, | |
306 | conf->beacon, | |
307 | conf->beacon_control); | |
308 | if (status) | |
309 | dev_kfree_skb(conf->beacon); | |
310 | ||
311 | return status; | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(rt2x00mac_config_interface); | |
314 | ||
95ea3627 ID |
315 | int rt2x00mac_get_stats(struct ieee80211_hw *hw, |
316 | struct ieee80211_low_level_stats *stats) | |
317 | { | |
318 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
319 | ||
320 | /* | |
321 | * The dot11ACKFailureCount, dot11RTSFailureCount and | |
322 | * dot11RTSSuccessCount are updated in interrupt time. | |
323 | * dot11FCSErrorCount is updated in the link tuner. | |
324 | */ | |
325 | memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats)); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | EXPORT_SYMBOL_GPL(rt2x00mac_get_stats); | |
330 | ||
331 | int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw, | |
332 | struct ieee80211_tx_queue_stats *stats) | |
333 | { | |
334 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
335 | unsigned int i; | |
336 | ||
337 | for (i = 0; i < hw->queues; i++) | |
338 | memcpy(&stats->data[i], &rt2x00dev->tx[i].stats, | |
339 | sizeof(rt2x00dev->tx[i].stats)); | |
340 | ||
341 | return 0; | |
342 | } | |
343 | EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats); | |
344 | ||
471b3efd JB |
345 | void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, |
346 | struct ieee80211_vif *vif, | |
347 | struct ieee80211_bss_conf *bss_conf, | |
348 | u32 changes) | |
5c58ee51 ID |
349 | { |
350 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
351 | int short_preamble; | |
352 | int ack_timeout; | |
353 | int ack_consume_time; | |
354 | int difs; | |
471b3efd | 355 | int preamble; |
5c58ee51 ID |
356 | |
357 | /* | |
358 | * We only support changing preamble mode. | |
359 | */ | |
471b3efd | 360 | if (!(changes & BSS_CHANGED_ERP_PREAMBLE)) |
5c58ee51 ID |
361 | return; |
362 | ||
471b3efd JB |
363 | short_preamble = bss_conf->use_short_preamble; |
364 | preamble = bss_conf->use_short_preamble ? | |
365 | SHORT_PREAMBLE : PREAMBLE; | |
5c58ee51 ID |
366 | |
367 | difs = (hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) ? | |
368 | SHORT_DIFS : DIFS; | |
369 | ack_timeout = difs + PLCP + preamble + get_duration(ACK_SIZE, 10); | |
370 | ||
371 | ack_consume_time = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10); | |
372 | ||
373 | if (short_preamble) | |
374 | __set_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags); | |
375 | else | |
376 | __clear_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags); | |
377 | ||
378 | rt2x00dev->ops->lib->config_preamble(rt2x00dev, short_preamble, | |
379 | ack_timeout, ack_consume_time); | |
380 | } | |
471b3efd | 381 | EXPORT_SYMBOL_GPL(rt2x00mac_bss_info_changed); |
5c58ee51 | 382 | |
95ea3627 ID |
383 | int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue, |
384 | const struct ieee80211_tx_queue_params *params) | |
385 | { | |
386 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
387 | struct data_ring *ring; | |
388 | ||
389 | ring = rt2x00lib_get_ring(rt2x00dev, queue); | |
390 | if (unlikely(!ring)) | |
391 | return -EINVAL; | |
392 | ||
393 | /* | |
394 | * The passed variables are stored as real value ((2^n)-1). | |
395 | * Ralink registers require to know the bit number 'n'. | |
396 | */ | |
397 | if (params->cw_min) | |
398 | ring->tx_params.cw_min = fls(params->cw_min); | |
399 | else | |
400 | ring->tx_params.cw_min = 5; /* cw_min: 2^5 = 32. */ | |
401 | ||
402 | if (params->cw_max) | |
403 | ring->tx_params.cw_max = fls(params->cw_max); | |
404 | else | |
405 | ring->tx_params.cw_max = 10; /* cw_min: 2^10 = 1024. */ | |
406 | ||
407 | if (params->aifs) | |
408 | ring->tx_params.aifs = params->aifs; | |
409 | else | |
410 | ring->tx_params.aifs = 2; | |
411 | ||
412 | INFO(rt2x00dev, | |
413 | "Configured TX ring %d - CWmin: %d, CWmax: %d, Aifs: %d.\n", | |
414 | queue, ring->tx_params.cw_min, ring->tx_params.cw_max, | |
415 | ring->tx_params.aifs); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | EXPORT_SYMBOL_GPL(rt2x00mac_conf_tx); |