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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: rt2x00lib | |
23 | Abstract: rt2x00 generic device routines. | |
24 | */ | |
25 | ||
95ea3627 ID |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | ||
29 | #include "rt2x00.h" | |
30 | #include "rt2x00lib.h" | |
4d8dd66c | 31 | #include "rt2x00dump.h" |
95ea3627 ID |
32 | |
33 | /* | |
34 | * Ring handler. | |
35 | */ | |
36 | struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev, | |
37 | const unsigned int queue) | |
38 | { | |
066cb637 | 39 | int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags); |
95ea3627 ID |
40 | |
41 | /* | |
42 | * Check if we are requesting a reqular TX ring, | |
43 | * or if we are requesting a Beacon or Atim ring. | |
44 | * For Atim rings, we should check if it is supported. | |
45 | */ | |
46 | if (queue < rt2x00dev->hw->queues && rt2x00dev->tx) | |
47 | return &rt2x00dev->tx[queue]; | |
48 | ||
49 | if (!rt2x00dev->bcn || !beacon) | |
50 | return NULL; | |
51 | ||
52 | if (queue == IEEE80211_TX_QUEUE_BEACON) | |
53 | return &rt2x00dev->bcn[0]; | |
54 | else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON) | |
55 | return &rt2x00dev->bcn[1]; | |
56 | ||
57 | return NULL; | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(rt2x00lib_get_ring); | |
60 | ||
61 | /* | |
62 | * Link tuning handlers | |
63 | */ | |
64 | static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev) | |
65 | { | |
8de8c516 ID |
66 | rt2x00dev->link.count = 0; |
67 | rt2x00dev->link.vgc_level = 0; | |
68 | ||
69 | memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual)); | |
70 | ||
71 | /* | |
72 | * The RX and TX percentage should start at 50% | |
73 | * this will assure we will get at least get some | |
74 | * decent value when the link tuner starts. | |
75 | * The value will be dropped and overwritten with | |
76 | * the correct (measured )value anyway during the | |
77 | * first run of the link tuner. | |
78 | */ | |
79 | rt2x00dev->link.qual.rx_percentage = 50; | |
80 | rt2x00dev->link.qual.tx_percentage = 50; | |
95ea3627 ID |
81 | |
82 | /* | |
83 | * Reset the link tuner. | |
84 | */ | |
85 | rt2x00dev->ops->lib->reset_tuner(rt2x00dev); | |
86 | ||
87 | queue_delayed_work(rt2x00dev->hw->workqueue, | |
88 | &rt2x00dev->link.work, LINK_TUNE_INTERVAL); | |
89 | } | |
90 | ||
91 | static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev) | |
92 | { | |
3e30968e | 93 | cancel_delayed_work_sync(&rt2x00dev->link.work); |
95ea3627 ID |
94 | } |
95 | ||
96 | void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev) | |
97 | { | |
fdd0abc8 ID |
98 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) |
99 | return; | |
100 | ||
95ea3627 ID |
101 | rt2x00lib_stop_link_tuner(rt2x00dev); |
102 | rt2x00lib_start_link_tuner(rt2x00dev); | |
103 | } | |
104 | ||
837e7f24 ID |
105 | /* |
106 | * Ring initialization | |
107 | */ | |
108 | static void rt2x00lib_init_rxrings(struct rt2x00_dev *rt2x00dev) | |
109 | { | |
110 | struct data_ring *ring = rt2x00dev->rx; | |
111 | unsigned int i; | |
112 | ||
113 | if (!rt2x00dev->ops->lib->init_rxentry) | |
114 | return; | |
115 | ||
116 | if (ring->data_addr) | |
117 | memset(ring->data_addr, 0, rt2x00_get_ring_size(ring)); | |
118 | ||
119 | for (i = 0; i < ring->stats.limit; i++) | |
120 | rt2x00dev->ops->lib->init_rxentry(rt2x00dev, &ring->entry[i]); | |
121 | ||
122 | rt2x00_ring_index_clear(ring); | |
123 | } | |
124 | ||
125 | static void rt2x00lib_init_txrings(struct rt2x00_dev *rt2x00dev) | |
126 | { | |
127 | struct data_ring *ring; | |
128 | unsigned int i; | |
129 | ||
130 | if (!rt2x00dev->ops->lib->init_txentry) | |
131 | return; | |
132 | ||
133 | txringall_for_each(rt2x00dev, ring) { | |
134 | if (ring->data_addr) | |
135 | memset(ring->data_addr, 0, rt2x00_get_ring_size(ring)); | |
136 | ||
137 | for (i = 0; i < ring->stats.limit; i++) | |
138 | rt2x00dev->ops->lib->init_txentry(rt2x00dev, | |
139 | &ring->entry[i]); | |
140 | ||
141 | rt2x00_ring_index_clear(ring); | |
142 | } | |
143 | } | |
144 | ||
95ea3627 ID |
145 | /* |
146 | * Radio control handlers. | |
147 | */ | |
148 | int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) | |
149 | { | |
150 | int status; | |
151 | ||
152 | /* | |
153 | * Don't enable the radio twice. | |
154 | * And check if the hardware button has been disabled. | |
155 | */ | |
156 | if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || | |
81873e9c | 157 | test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags)) |
95ea3627 ID |
158 | return 0; |
159 | ||
837e7f24 ID |
160 | /* |
161 | * Initialize all data rings. | |
162 | */ | |
163 | rt2x00lib_init_rxrings(rt2x00dev); | |
164 | rt2x00lib_init_txrings(rt2x00dev); | |
165 | ||
95ea3627 ID |
166 | /* |
167 | * Enable radio. | |
168 | */ | |
169 | status = rt2x00dev->ops->lib->set_device_state(rt2x00dev, | |
170 | STATE_RADIO_ON); | |
171 | if (status) | |
172 | return status; | |
173 | ||
174 | __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); | |
175 | ||
176 | /* | |
177 | * Enable RX. | |
178 | */ | |
5cbf830e | 179 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 ID |
180 | |
181 | /* | |
182 | * Start the TX queues. | |
183 | */ | |
184 | ieee80211_start_queues(rt2x00dev->hw); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
190 | { | |
191 | if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
192 | return; | |
193 | ||
194 | /* | |
4150c572 | 195 | * Stop all scheduled work. |
95ea3627 ID |
196 | */ |
197 | if (work_pending(&rt2x00dev->beacon_work)) | |
198 | cancel_work_sync(&rt2x00dev->beacon_work); | |
4150c572 JB |
199 | if (work_pending(&rt2x00dev->filter_work)) |
200 | cancel_work_sync(&rt2x00dev->filter_work); | |
5c58ee51 ID |
201 | if (work_pending(&rt2x00dev->config_work)) |
202 | cancel_work_sync(&rt2x00dev->config_work); | |
95ea3627 ID |
203 | |
204 | /* | |
205 | * Stop the TX queues. | |
206 | */ | |
207 | ieee80211_stop_queues(rt2x00dev->hw); | |
208 | ||
209 | /* | |
210 | * Disable RX. | |
211 | */ | |
5cbf830e | 212 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
213 | |
214 | /* | |
215 | * Disable radio. | |
216 | */ | |
217 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
218 | } | |
219 | ||
5cbf830e | 220 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 221 | { |
95ea3627 ID |
222 | /* |
223 | * When we are disabling the RX, we should also stop the link tuner. | |
224 | */ | |
5cbf830e | 225 | if (state == STATE_RADIO_RX_OFF) |
95ea3627 ID |
226 | rt2x00lib_stop_link_tuner(rt2x00dev); |
227 | ||
228 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
229 | ||
230 | /* | |
231 | * When we are enabling the RX, we should also start the link tuner. | |
232 | */ | |
5cbf830e ID |
233 | if (state == STATE_RADIO_RX_ON && |
234 | is_interface_present(&rt2x00dev->interface)) | |
95ea3627 ID |
235 | rt2x00lib_start_link_tuner(rt2x00dev); |
236 | } | |
237 | ||
69f81a2c ID |
238 | static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev) |
239 | { | |
240 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
241 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
242 | int sample_a = | |
243 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A); | |
244 | int sample_b = | |
245 | rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B); | |
246 | ||
247 | /* | |
248 | * We are done sampling. Now we should evaluate the results. | |
249 | */ | |
250 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
251 | ||
252 | /* | |
253 | * During the last period we have sampled the RSSI | |
254 | * from both antenna's. It now is time to determine | |
255 | * which antenna demonstrated the best performance. | |
256 | * When we are already on the antenna with the best | |
257 | * performance, then there really is nothing for us | |
258 | * left to do. | |
259 | */ | |
260 | if (sample_a == sample_b) | |
261 | return; | |
262 | ||
05253c93 ID |
263 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) |
264 | rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c | 265 | |
05253c93 ID |
266 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) |
267 | tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B; | |
69f81a2c ID |
268 | |
269 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
270 | } | |
271 | ||
272 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
273 | { | |
274 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
275 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
276 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
277 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
278 | ||
279 | /* | |
280 | * Legacy driver indicates that we should swap antenna's | |
281 | * when the difference in RSSI is greater that 5. This | |
282 | * also should be done when the RSSI was actually better | |
283 | * then the previous sample. | |
284 | * When the difference exceeds the threshold we should | |
285 | * sample the rssi from the other antenna to make a valid | |
286 | * comparison between the 2 antennas. | |
287 | */ | |
b290d433 | 288 | if (abs(rssi_curr - rssi_old) < 5) |
69f81a2c ID |
289 | return; |
290 | ||
291 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
292 | ||
293 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
294 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
295 | ||
296 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
297 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
298 | ||
299 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
300 | } | |
301 | ||
302 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
303 | { | |
304 | /* | |
305 | * Determine if software diversity is enabled for | |
306 | * either the TX or RX antenna (or both). | |
307 | * Always perform this check since within the link | |
308 | * tuner interval the configuration might have changed. | |
309 | */ | |
310 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
311 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
312 | ||
313 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
b290d433 | 314 | rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
315 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; |
316 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
b290d433 | 317 | rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY) |
69f81a2c ID |
318 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; |
319 | ||
320 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
321 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
05253c93 | 322 | rt2x00dev->link.ant.flags = 0; |
69f81a2c ID |
323 | return; |
324 | } | |
325 | ||
326 | /* | |
327 | * If we have only sampled the data over the last period | |
328 | * we should now harvest the data. Otherwise just evaluate | |
329 | * the data. The latter should only be performed once | |
330 | * every 2 seconds. | |
331 | */ | |
332 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
333 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
334 | else if (rt2x00dev->link.count & 1) | |
335 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
336 | } | |
337 | ||
338 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
339 | { | |
340 | int avg_rssi = rssi; | |
341 | ||
342 | /* | |
343 | * Update global RSSI | |
344 | */ | |
345 | if (link->qual.avg_rssi) | |
346 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
347 | link->qual.avg_rssi = avg_rssi; | |
348 | ||
349 | /* | |
350 | * Update antenna RSSI | |
351 | */ | |
352 | if (link->ant.rssi_ant) | |
353 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
354 | link->ant.rssi_ant = rssi; | |
355 | } | |
356 | ||
ebcf26da | 357 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 358 | { |
ebcf26da ID |
359 | if (qual->rx_failed || qual->rx_success) |
360 | qual->rx_percentage = | |
361 | (qual->rx_success * 100) / | |
362 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 363 | else |
ebcf26da | 364 | qual->rx_percentage = 50; |
95ea3627 | 365 | |
ebcf26da ID |
366 | if (qual->tx_failed || qual->tx_success) |
367 | qual->tx_percentage = | |
368 | (qual->tx_success * 100) / | |
369 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 370 | else |
ebcf26da | 371 | qual->tx_percentage = 50; |
95ea3627 | 372 | |
ebcf26da ID |
373 | qual->rx_success = 0; |
374 | qual->rx_failed = 0; | |
375 | qual->tx_success = 0; | |
376 | qual->tx_failed = 0; | |
95ea3627 ID |
377 | } |
378 | ||
379 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
380 | int rssi) | |
381 | { | |
382 | int rssi_percentage = 0; | |
383 | int signal; | |
384 | ||
385 | /* | |
386 | * We need a positive value for the RSSI. | |
387 | */ | |
388 | if (rssi < 0) | |
389 | rssi += rt2x00dev->rssi_offset; | |
390 | ||
391 | /* | |
392 | * Calculate the different percentages, | |
393 | * which will be used for the signal. | |
394 | */ | |
395 | if (rt2x00dev->rssi_offset) | |
396 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
397 | ||
398 | /* | |
399 | * Add the individual percentages and use the WEIGHT | |
400 | * defines to calculate the current link signal. | |
401 | */ | |
402 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
403 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
404 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
405 | |
406 | return (signal > 100) ? 100 : signal; | |
407 | } | |
408 | ||
409 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
410 | { | |
411 | struct rt2x00_dev *rt2x00dev = | |
412 | container_of(work, struct rt2x00_dev, link.work.work); | |
413 | ||
25ab002f ID |
414 | /* |
415 | * When the radio is shutting down we should | |
416 | * immediately cease all link tuning. | |
417 | */ | |
418 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
419 | return; | |
420 | ||
95ea3627 ID |
421 | /* |
422 | * Update statistics. | |
423 | */ | |
ebcf26da | 424 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 425 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 426 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 427 | |
95ea3627 ID |
428 | /* |
429 | * Only perform the link tuning when Link tuning | |
430 | * has been enabled (This could have been disabled from the EEPROM). | |
431 | */ | |
432 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
433 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
434 | ||
69f81a2c ID |
435 | /* |
436 | * Evaluate antenna setup. | |
437 | */ | |
438 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
439 | ||
725d99d4 ID |
440 | /* |
441 | * Precalculate a portion of the link signal which is | |
442 | * in based on the tx/rx success/failure counters. | |
443 | */ | |
ebcf26da | 444 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 445 | |
95ea3627 ID |
446 | /* |
447 | * Increase tuner counter, and reschedule the next link tuner run. | |
448 | */ | |
449 | rt2x00dev->link.count++; | |
450 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
451 | LINK_TUNE_INTERVAL); | |
452 | } | |
453 | ||
4150c572 JB |
454 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
455 | { | |
456 | struct rt2x00_dev *rt2x00dev = | |
457 | container_of(work, struct rt2x00_dev, filter_work); | |
3c4f2085 | 458 | unsigned int filter = rt2x00dev->packet_filter; |
5886d0db ID |
459 | |
460 | /* | |
461 | * Since we had stored the filter inside interface.filter, | |
462 | * we should now clear that field. Otherwise the driver will | |
463 | * assume nothing has changed (*total_flags will be compared | |
464 | * to interface.filter to determine if any action is required). | |
465 | */ | |
3c4f2085 | 466 | rt2x00dev->packet_filter = 0; |
4150c572 JB |
467 | |
468 | rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw, | |
5886d0db | 469 | filter, &filter, 0, NULL); |
4150c572 JB |
470 | } |
471 | ||
5c58ee51 ID |
472 | static void rt2x00lib_configuration_scheduled(struct work_struct *work) |
473 | { | |
474 | struct rt2x00_dev *rt2x00dev = | |
475 | container_of(work, struct rt2x00_dev, config_work); | |
471b3efd | 476 | struct ieee80211_bss_conf bss_conf; |
5c58ee51 | 477 | |
471b3efd JB |
478 | bss_conf.use_short_preamble = |
479 | test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags); | |
480 | ||
481 | /* | |
482 | * FIXME: shouldn't invoke it this way because all other contents | |
483 | * of bss_conf is invalid. | |
484 | */ | |
485 | rt2x00mac_bss_info_changed(rt2x00dev->hw, rt2x00dev->interface.id, | |
486 | &bss_conf, BSS_CHANGED_ERP_PREAMBLE); | |
5c58ee51 ID |
487 | } |
488 | ||
95ea3627 ID |
489 | /* |
490 | * Interrupt context handlers. | |
491 | */ | |
492 | static void rt2x00lib_beacondone_scheduled(struct work_struct *work) | |
493 | { | |
494 | struct rt2x00_dev *rt2x00dev = | |
495 | container_of(work, struct rt2x00_dev, beacon_work); | |
496 | struct data_ring *ring = | |
497 | rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON); | |
498 | struct data_entry *entry = rt2x00_get_data_entry(ring); | |
499 | struct sk_buff *skb; | |
500 | ||
501 | skb = ieee80211_beacon_get(rt2x00dev->hw, | |
502 | rt2x00dev->interface.id, | |
503 | &entry->tx_status.control); | |
504 | if (!skb) | |
505 | return; | |
506 | ||
507 | rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, | |
508 | &entry->tx_status.control); | |
509 | ||
510 | dev_kfree_skb(skb); | |
511 | } | |
512 | ||
513 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
514 | { | |
515 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
516 | return; | |
517 | ||
518 | queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work); | |
519 | } | |
520 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
521 | ||
522 | void rt2x00lib_txdone(struct data_entry *entry, | |
523 | const int status, const int retry) | |
524 | { | |
525 | struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; | |
526 | struct ieee80211_tx_status *tx_status = &entry->tx_status; | |
527 | struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats; | |
528 | int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY); | |
529 | int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID || | |
530 | status == TX_FAIL_OTHER); | |
531 | ||
532 | /* | |
533 | * Update TX statistics. | |
534 | */ | |
535 | tx_status->flags = 0; | |
536 | tx_status->ack_signal = 0; | |
537 | tx_status->excessive_retries = (status == TX_FAIL_RETRY); | |
538 | tx_status->retry_count = retry; | |
ebcf26da ID |
539 | rt2x00dev->link.qual.tx_success += success; |
540 | rt2x00dev->link.qual.tx_failed += retry + fail; | |
95ea3627 ID |
541 | |
542 | if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
543 | if (success) | |
544 | tx_status->flags |= IEEE80211_TX_STATUS_ACK; | |
545 | else | |
546 | stats->dot11ACKFailureCount++; | |
547 | } | |
548 | ||
549 | tx_status->queue_length = entry->ring->stats.limit; | |
550 | tx_status->queue_number = tx_status->control.queue; | |
551 | ||
552 | if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { | |
553 | if (success) | |
554 | stats->dot11RTSSuccessCount++; | |
555 | else | |
556 | stats->dot11RTSFailureCount++; | |
557 | } | |
558 | ||
559 | /* | |
4d8dd66c ID |
560 | * Send the tx_status to mac80211 & debugfs. |
561 | * mac80211 will clean up the skb structure. | |
95ea3627 | 562 | */ |
4d8dd66c ID |
563 | get_skb_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE; |
564 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
95ea3627 ID |
565 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status); |
566 | entry->skb = NULL; | |
567 | } | |
568 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
569 | ||
570 | void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb, | |
4150c572 | 571 | struct rxdata_entry_desc *desc) |
95ea3627 ID |
572 | { |
573 | struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; | |
574 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; | |
575 | struct ieee80211_hw_mode *mode; | |
576 | struct ieee80211_rate *rate; | |
61af43c5 | 577 | struct ieee80211_hdr *hdr; |
95ea3627 ID |
578 | unsigned int i; |
579 | int val = 0; | |
61af43c5 | 580 | u16 fc; |
95ea3627 ID |
581 | |
582 | /* | |
583 | * Update RX statistics. | |
584 | */ | |
585 | mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode]; | |
586 | for (i = 0; i < mode->num_rates; i++) { | |
587 | rate = &mode->rates[i]; | |
588 | ||
589 | /* | |
590 | * When frame was received with an OFDM bitrate, | |
591 | * the signal is the PLCP value. If it was received with | |
592 | * a CCK bitrate the signal is the rate in 0.5kbit/s. | |
593 | */ | |
4150c572 | 594 | if (!desc->ofdm) |
95ea3627 ID |
595 | val = DEVICE_GET_RATE_FIELD(rate->val, RATE); |
596 | else | |
597 | val = DEVICE_GET_RATE_FIELD(rate->val, PLCP); | |
598 | ||
4150c572 | 599 | if (val == desc->signal) { |
95ea3627 ID |
600 | val = rate->val; |
601 | break; | |
602 | } | |
603 | } | |
604 | ||
61af43c5 | 605 | /* |
7e56d38d | 606 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 607 | */ |
7e56d38d ID |
608 | hdr = (struct ieee80211_hdr*)skb->data; |
609 | fc = le16_to_cpu(hdr->frame_control); | |
610 | if (is_beacon(fc) && desc->my_bss) | |
611 | rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi); | |
61af43c5 | 612 | |
ebcf26da | 613 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 614 | |
95ea3627 | 615 | rx_status->rate = val; |
4150c572 JB |
616 | rx_status->signal = |
617 | rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi); | |
618 | rx_status->ssi = desc->rssi; | |
619 | rx_status->flag = desc->flags; | |
69f81a2c | 620 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
621 | |
622 | /* | |
4d8dd66c | 623 | * Send frame to mac80211 & debugfs |
95ea3627 | 624 | */ |
4d8dd66c ID |
625 | get_skb_desc(skb)->frame_type = DUMP_FRAME_RXDONE; |
626 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
627 | ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status); |
628 | } | |
629 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
630 | ||
631 | /* | |
632 | * TX descriptor initializer | |
633 | */ | |
634 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 635 | struct sk_buff *skb, |
95ea3627 ID |
636 | struct ieee80211_tx_control *control) |
637 | { | |
4150c572 | 638 | struct txdata_entry_desc desc; |
08992f7f ID |
639 | struct skb_desc *skbdesc = get_skb_desc(skb); |
640 | struct ieee80211_hdr *ieee80211hdr = skbdesc->data; | |
95ea3627 ID |
641 | int tx_rate; |
642 | int bitrate; | |
08992f7f | 643 | int length; |
95ea3627 ID |
644 | int duration; |
645 | int residual; | |
646 | u16 frame_control; | |
647 | u16 seq_ctrl; | |
648 | ||
08992f7f | 649 | memset(&desc, 0, sizeof(desc)); |
95ea3627 | 650 | |
08992f7f ID |
651 | desc.cw_min = skbdesc->ring->tx_params.cw_min; |
652 | desc.cw_max = skbdesc->ring->tx_params.cw_max; | |
653 | desc.aifs = skbdesc->ring->tx_params.aifs; | |
95ea3627 ID |
654 | |
655 | /* | |
656 | * Identify queue | |
657 | */ | |
658 | if (control->queue < rt2x00dev->hw->queues) | |
659 | desc.queue = control->queue; | |
660 | else if (control->queue == IEEE80211_TX_QUEUE_BEACON || | |
661 | control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON) | |
662 | desc.queue = QUEUE_MGMT; | |
663 | else | |
664 | desc.queue = QUEUE_OTHER; | |
665 | ||
666 | /* | |
667 | * Read required fields from ieee80211 header. | |
668 | */ | |
669 | frame_control = le16_to_cpu(ieee80211hdr->frame_control); | |
670 | seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl); | |
671 | ||
672 | tx_rate = control->tx_rate; | |
673 | ||
2700f8b0 MN |
674 | /* |
675 | * Check whether this frame is to be acked | |
676 | */ | |
677 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
678 | __set_bit(ENTRY_TXD_ACK, &desc.flags); | |
679 | ||
95ea3627 ID |
680 | /* |
681 | * Check if this is a RTS/CTS frame | |
682 | */ | |
683 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
684 | __set_bit(ENTRY_TXD_BURST, &desc.flags); | |
2700f8b0 | 685 | if (is_rts_frame(frame_control)) { |
95ea3627 | 686 | __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags); |
2700f8b0 MN |
687 | __set_bit(ENTRY_TXD_ACK, &desc.flags); |
688 | } else | |
689 | __clear_bit(ENTRY_TXD_ACK, &desc.flags); | |
95ea3627 ID |
690 | if (control->rts_cts_rate) |
691 | tx_rate = control->rts_cts_rate; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Check for OFDM | |
696 | */ | |
697 | if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK) | |
698 | __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags); | |
699 | ||
700 | /* | |
701 | * Check if more fragments are pending | |
702 | */ | |
703 | if (ieee80211_get_morefrag(ieee80211hdr)) { | |
704 | __set_bit(ENTRY_TXD_BURST, &desc.flags); | |
705 | __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags); | |
706 | } | |
707 | ||
708 | /* | |
709 | * Beacons and probe responses require the tsf timestamp | |
710 | * to be inserted into the frame. | |
711 | */ | |
712 | if (control->queue == IEEE80211_TX_QUEUE_BEACON || | |
713 | is_probe_resp(frame_control)) | |
714 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags); | |
715 | ||
716 | /* | |
717 | * Determine with what IFS priority this frame should be send. | |
718 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
719 | * or this fragment came after RTS/CTS. | |
720 | */ | |
721 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
722 | test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags)) | |
723 | desc.ifs = IFS_SIFS; | |
724 | else | |
725 | desc.ifs = IFS_BACKOFF; | |
726 | ||
727 | /* | |
728 | * PLCP setup | |
729 | * Length calculation depends on OFDM/CCK rate. | |
730 | */ | |
731 | desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP); | |
732 | desc.service = 0x04; | |
733 | ||
08992f7f | 734 | length = skbdesc->data_len + FCS_LEN; |
95ea3627 | 735 | if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) { |
08992f7f ID |
736 | desc.length_high = (length >> 6) & 0x3f; |
737 | desc.length_low = length & 0x3f; | |
95ea3627 ID |
738 | } else { |
739 | bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE); | |
740 | ||
741 | /* | |
742 | * Convert length to microseconds. | |
743 | */ | |
08992f7f ID |
744 | residual = get_duration_res(length, bitrate); |
745 | duration = get_duration(length, bitrate); | |
95ea3627 ID |
746 | |
747 | if (residual != 0) { | |
748 | duration++; | |
749 | ||
750 | /* | |
751 | * Check if we need to set the Length Extension | |
752 | */ | |
db151787 | 753 | if (bitrate == 110 && residual <= 30) |
95ea3627 ID |
754 | desc.service |= 0x80; |
755 | } | |
756 | ||
757 | desc.length_high = (duration >> 8) & 0xff; | |
758 | desc.length_low = duration & 0xff; | |
759 | ||
760 | /* | |
761 | * When preamble is enabled we should set the | |
762 | * preamble bit for the signal. | |
763 | */ | |
764 | if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE)) | |
765 | desc.signal |= 0x08; | |
766 | } | |
767 | ||
dd3193e1 | 768 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &desc, control); |
08992f7f ID |
769 | |
770 | /* | |
771 | * Update ring entry. | |
772 | */ | |
773 | skbdesc->entry->skb = skb; | |
774 | memcpy(&skbdesc->entry->tx_status.control, control, sizeof(*control)); | |
4d8dd66c ID |
775 | |
776 | /* | |
777 | * The frame has been completely initialized and ready | |
778 | * for sending to the device. The caller will push the | |
779 | * frame to the device, but we are going to push the | |
780 | * frame to debugfs here. | |
781 | */ | |
782 | skbdesc->frame_type = DUMP_FRAME_TX; | |
783 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
784 | } |
785 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
786 | ||
787 | /* | |
788 | * Driver initialization handlers. | |
789 | */ | |
790 | static void rt2x00lib_channel(struct ieee80211_channel *entry, | |
791 | const int channel, const int tx_power, | |
792 | const int value) | |
793 | { | |
794 | entry->chan = channel; | |
795 | if (channel <= 14) | |
796 | entry->freq = 2407 + (5 * channel); | |
797 | else | |
798 | entry->freq = 5000 + (5 * channel); | |
799 | entry->val = value; | |
800 | entry->flag = | |
801 | IEEE80211_CHAN_W_IBSS | | |
802 | IEEE80211_CHAN_W_ACTIVE_SCAN | | |
803 | IEEE80211_CHAN_W_SCAN; | |
804 | entry->power_level = tx_power; | |
805 | entry->antenna_max = 0xff; | |
806 | } | |
807 | ||
808 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
809 | const int rate, const int mask, | |
810 | const int plcp, const int flags) | |
811 | { | |
812 | entry->rate = rate; | |
813 | entry->val = | |
814 | DEVICE_SET_RATE_FIELD(rate, RATE) | | |
815 | DEVICE_SET_RATE_FIELD(mask, RATEMASK) | | |
816 | DEVICE_SET_RATE_FIELD(plcp, PLCP); | |
817 | entry->flags = flags; | |
818 | entry->val2 = entry->val; | |
819 | if (entry->flags & IEEE80211_RATE_PREAMBLE2) | |
820 | entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE); | |
821 | entry->min_rssi_ack = 0; | |
822 | entry->min_rssi_ack_delta = 0; | |
823 | } | |
824 | ||
825 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
826 | struct hw_mode_spec *spec) | |
827 | { | |
828 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
829 | struct ieee80211_hw_mode *hwmodes; | |
830 | struct ieee80211_channel *channels; | |
831 | struct ieee80211_rate *rates; | |
832 | unsigned int i; | |
833 | unsigned char tx_power; | |
834 | ||
835 | hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL); | |
836 | if (!hwmodes) | |
837 | goto exit; | |
838 | ||
839 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
840 | if (!channels) | |
841 | goto exit_free_modes; | |
842 | ||
843 | rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL); | |
844 | if (!rates) | |
845 | goto exit_free_channels; | |
846 | ||
847 | /* | |
848 | * Initialize Rate list. | |
849 | */ | |
850 | rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB, | |
851 | 0x00, IEEE80211_RATE_CCK); | |
852 | rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB, | |
853 | 0x01, IEEE80211_RATE_CCK_2); | |
854 | rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB, | |
855 | 0x02, IEEE80211_RATE_CCK_2); | |
856 | rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB, | |
857 | 0x03, IEEE80211_RATE_CCK_2); | |
858 | ||
859 | if (spec->num_rates > 4) { | |
860 | rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB, | |
861 | 0x0b, IEEE80211_RATE_OFDM); | |
862 | rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB, | |
863 | 0x0f, IEEE80211_RATE_OFDM); | |
864 | rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB, | |
865 | 0x0a, IEEE80211_RATE_OFDM); | |
866 | rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB, | |
867 | 0x0e, IEEE80211_RATE_OFDM); | |
868 | rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB, | |
869 | 0x09, IEEE80211_RATE_OFDM); | |
870 | rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB, | |
871 | 0x0d, IEEE80211_RATE_OFDM); | |
872 | rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB, | |
873 | 0x08, IEEE80211_RATE_OFDM); | |
874 | rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB, | |
875 | 0x0c, IEEE80211_RATE_OFDM); | |
876 | } | |
877 | ||
878 | /* | |
879 | * Initialize Channel list. | |
880 | */ | |
881 | for (i = 0; i < spec->num_channels; i++) { | |
882 | if (spec->channels[i].channel <= 14) | |
883 | tx_power = spec->tx_power_bg[i]; | |
884 | else if (spec->tx_power_a) | |
885 | tx_power = spec->tx_power_a[i]; | |
886 | else | |
887 | tx_power = spec->tx_power_default; | |
888 | ||
889 | rt2x00lib_channel(&channels[i], | |
890 | spec->channels[i].channel, tx_power, i); | |
891 | } | |
892 | ||
893 | /* | |
894 | * Intitialize 802.11b | |
895 | * Rates: CCK. | |
896 | * Channels: OFDM. | |
897 | */ | |
898 | if (spec->num_modes > HWMODE_B) { | |
899 | hwmodes[HWMODE_B].mode = MODE_IEEE80211B; | |
900 | hwmodes[HWMODE_B].num_channels = 14; | |
901 | hwmodes[HWMODE_B].num_rates = 4; | |
902 | hwmodes[HWMODE_B].channels = channels; | |
903 | hwmodes[HWMODE_B].rates = rates; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Intitialize 802.11g | |
908 | * Rates: CCK, OFDM. | |
909 | * Channels: OFDM. | |
910 | */ | |
911 | if (spec->num_modes > HWMODE_G) { | |
912 | hwmodes[HWMODE_G].mode = MODE_IEEE80211G; | |
913 | hwmodes[HWMODE_G].num_channels = 14; | |
914 | hwmodes[HWMODE_G].num_rates = spec->num_rates; | |
915 | hwmodes[HWMODE_G].channels = channels; | |
916 | hwmodes[HWMODE_G].rates = rates; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Intitialize 802.11a | |
921 | * Rates: OFDM. | |
922 | * Channels: OFDM, UNII, HiperLAN2. | |
923 | */ | |
924 | if (spec->num_modes > HWMODE_A) { | |
925 | hwmodes[HWMODE_A].mode = MODE_IEEE80211A; | |
926 | hwmodes[HWMODE_A].num_channels = spec->num_channels - 14; | |
927 | hwmodes[HWMODE_A].num_rates = spec->num_rates - 4; | |
928 | hwmodes[HWMODE_A].channels = &channels[14]; | |
929 | hwmodes[HWMODE_A].rates = &rates[4]; | |
930 | } | |
931 | ||
932 | if (spec->num_modes > HWMODE_G && | |
933 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G])) | |
934 | goto exit_free_rates; | |
935 | ||
936 | if (spec->num_modes > HWMODE_B && | |
937 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B])) | |
938 | goto exit_free_rates; | |
939 | ||
940 | if (spec->num_modes > HWMODE_A && | |
941 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A])) | |
942 | goto exit_free_rates; | |
943 | ||
944 | rt2x00dev->hwmodes = hwmodes; | |
945 | ||
946 | return 0; | |
947 | ||
948 | exit_free_rates: | |
949 | kfree(rates); | |
950 | ||
951 | exit_free_channels: | |
952 | kfree(channels); | |
953 | ||
954 | exit_free_modes: | |
955 | kfree(hwmodes); | |
956 | ||
957 | exit: | |
958 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); | |
959 | return -ENOMEM; | |
960 | } | |
961 | ||
962 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
963 | { | |
066cb637 | 964 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
965 | ieee80211_unregister_hw(rt2x00dev->hw); |
966 | ||
967 | if (likely(rt2x00dev->hwmodes)) { | |
968 | kfree(rt2x00dev->hwmodes->channels); | |
969 | kfree(rt2x00dev->hwmodes->rates); | |
970 | kfree(rt2x00dev->hwmodes); | |
971 | rt2x00dev->hwmodes = NULL; | |
972 | } | |
973 | } | |
974 | ||
975 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
976 | { | |
977 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
978 | int status; | |
979 | ||
980 | /* | |
981 | * Initialize HW modes. | |
982 | */ | |
983 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
984 | if (status) | |
985 | return status; | |
986 | ||
987 | /* | |
988 | * Register HW. | |
989 | */ | |
990 | status = ieee80211_register_hw(rt2x00dev->hw); | |
991 | if (status) { | |
992 | rt2x00lib_remove_hw(rt2x00dev); | |
993 | return status; | |
994 | } | |
995 | ||
066cb637 | 996 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
997 | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * Initialization/uninitialization handlers. | |
1003 | */ | |
1004 | static int rt2x00lib_alloc_entries(struct data_ring *ring, | |
1005 | const u16 max_entries, const u16 data_size, | |
1006 | const u16 desc_size) | |
1007 | { | |
1008 | struct data_entry *entry; | |
1009 | unsigned int i; | |
1010 | ||
1011 | ring->stats.limit = max_entries; | |
1012 | ring->data_size = data_size; | |
1013 | ring->desc_size = desc_size; | |
1014 | ||
1015 | /* | |
1016 | * Allocate all ring entries. | |
1017 | */ | |
1018 | entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL); | |
1019 | if (!entry) | |
1020 | return -ENOMEM; | |
1021 | ||
1022 | for (i = 0; i < ring->stats.limit; i++) { | |
1023 | entry[i].flags = 0; | |
1024 | entry[i].ring = ring; | |
1025 | entry[i].skb = NULL; | |
04267104 | 1026 | entry[i].entry_idx = i; |
95ea3627 ID |
1027 | } |
1028 | ||
1029 | ring->entry = entry; | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev) | |
1035 | { | |
1036 | struct data_ring *ring; | |
1037 | ||
1038 | /* | |
1039 | * Allocate the RX ring. | |
1040 | */ | |
1041 | if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE, | |
1042 | rt2x00dev->ops->rxd_size)) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | /* | |
1046 | * First allocate the TX rings. | |
1047 | */ | |
1048 | txring_for_each(rt2x00dev, ring) { | |
1049 | if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE, | |
1050 | rt2x00dev->ops->txd_size)) | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
066cb637 | 1054 | if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) |
95ea3627 ID |
1055 | return 0; |
1056 | ||
1057 | /* | |
1058 | * Allocate the BEACON ring. | |
1059 | */ | |
1060 | if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES, | |
1061 | MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size)) | |
1062 | return -ENOMEM; | |
1063 | ||
1064 | /* | |
1065 | * Allocate the Atim ring. | |
1066 | */ | |
1067 | if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES, | |
1068 | DATA_FRAME_SIZE, rt2x00dev->ops->txd_size)) | |
1069 | return -ENOMEM; | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev) | |
1075 | { | |
1076 | struct data_ring *ring; | |
1077 | ||
1078 | ring_for_each(rt2x00dev, ring) { | |
1079 | kfree(ring->entry); | |
1080 | ring->entry = NULL; | |
1081 | } | |
1082 | } | |
1083 | ||
e37ea213 | 1084 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1085 | { |
1086 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1087 | return; | |
1088 | ||
1089 | /* | |
1090 | * Unregister rfkill. | |
1091 | */ | |
1092 | rt2x00rfkill_unregister(rt2x00dev); | |
1093 | ||
1094 | /* | |
1095 | * Allow the HW to uninitialize. | |
1096 | */ | |
1097 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1098 | ||
1099 | /* | |
1100 | * Free allocated ring entries. | |
1101 | */ | |
1102 | rt2x00lib_free_ring_entries(rt2x00dev); | |
1103 | } | |
1104 | ||
e37ea213 | 1105 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1106 | { |
1107 | int status; | |
1108 | ||
1109 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1110 | return 0; | |
1111 | ||
1112 | /* | |
1113 | * Allocate all ring entries. | |
1114 | */ | |
1115 | status = rt2x00lib_alloc_ring_entries(rt2x00dev); | |
1116 | if (status) { | |
1117 | ERROR(rt2x00dev, "Ring entries allocation failed.\n"); | |
1118 | return status; | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * Initialize the device. | |
1123 | */ | |
1124 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
1125 | if (status) | |
1126 | goto exit; | |
1127 | ||
1128 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
1129 | ||
1130 | /* | |
1131 | * Register the rfkill handler. | |
1132 | */ | |
1133 | status = rt2x00rfkill_register(rt2x00dev); | |
1134 | if (status) | |
1135 | goto exit_unitialize; | |
1136 | ||
1137 | return 0; | |
1138 | ||
1139 | exit_unitialize: | |
1140 | rt2x00lib_uninitialize(rt2x00dev); | |
1141 | ||
1142 | exit: | |
1143 | rt2x00lib_free_ring_entries(rt2x00dev); | |
1144 | ||
1145 | return status; | |
1146 | } | |
1147 | ||
e37ea213 ID |
1148 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1149 | { | |
1150 | int retval; | |
1151 | ||
1152 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1153 | return 0; | |
1154 | ||
1155 | /* | |
1156 | * If this is the first interface which is added, | |
1157 | * we should load the firmware now. | |
1158 | */ | |
1159 | if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) { | |
1160 | retval = rt2x00lib_load_firmware(rt2x00dev); | |
1161 | if (retval) | |
1162 | return retval; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Initialize the device. | |
1167 | */ | |
1168 | retval = rt2x00lib_initialize(rt2x00dev); | |
1169 | if (retval) | |
1170 | return retval; | |
1171 | ||
1172 | /* | |
1173 | * Enable radio. | |
1174 | */ | |
1175 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1176 | if (retval) { | |
1177 | rt2x00lib_uninitialize(rt2x00dev); | |
1178 | return retval; | |
1179 | } | |
1180 | ||
1181 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1187 | { | |
1188 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1189 | return; | |
1190 | ||
1191 | /* | |
1192 | * Perhaps we can add something smarter here, | |
1193 | * but for now just disabling the radio should do. | |
1194 | */ | |
1195 | rt2x00lib_disable_radio(rt2x00dev); | |
1196 | ||
1197 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); | |
1198 | } | |
1199 | ||
95ea3627 ID |
1200 | /* |
1201 | * driver allocation handlers. | |
1202 | */ | |
1203 | static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev) | |
1204 | { | |
1205 | struct data_ring *ring; | |
04267104 | 1206 | unsigned int index; |
95ea3627 ID |
1207 | |
1208 | /* | |
1209 | * We need the following rings: | |
1210 | * RX: 1 | |
1211 | * TX: hw->queues | |
1212 | * Beacon: 1 (if required) | |
1213 | * Atim: 1 (if required) | |
1214 | */ | |
1215 | rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues + | |
066cb637 | 1216 | (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)); |
95ea3627 ID |
1217 | |
1218 | ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL); | |
1219 | if (!ring) { | |
1220 | ERROR(rt2x00dev, "Ring allocation failed.\n"); | |
1221 | return -ENOMEM; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Initialize pointers | |
1226 | */ | |
1227 | rt2x00dev->rx = ring; | |
1228 | rt2x00dev->tx = &rt2x00dev->rx[1]; | |
066cb637 | 1229 | if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) |
95ea3627 ID |
1230 | rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues]; |
1231 | ||
1232 | /* | |
1233 | * Initialize ring parameters. | |
89539ebe ID |
1234 | * RX: queue_idx = 0 |
1235 | * TX: queue_idx = IEEE80211_TX_QUEUE_DATA0 + index | |
1236 | * TX: cw_min: 2^5 = 32. | |
1237 | * TX: cw_max: 2^10 = 1024. | |
95ea3627 | 1238 | */ |
89539ebe ID |
1239 | rt2x00dev->rx->rt2x00dev = rt2x00dev; |
1240 | rt2x00dev->rx->queue_idx = 0; | |
1241 | ||
1242 | index = IEEE80211_TX_QUEUE_DATA0; | |
1243 | txring_for_each(rt2x00dev, ring) { | |
95ea3627 | 1244 | ring->rt2x00dev = rt2x00dev; |
04267104 | 1245 | ring->queue_idx = index++; |
95ea3627 ID |
1246 | ring->tx_params.aifs = 2; |
1247 | ring->tx_params.cw_min = 5; | |
1248 | ring->tx_params.cw_max = 10; | |
1249 | } | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev) | |
1255 | { | |
1256 | kfree(rt2x00dev->rx); | |
1257 | rt2x00dev->rx = NULL; | |
1258 | rt2x00dev->tx = NULL; | |
1259 | rt2x00dev->bcn = NULL; | |
1260 | } | |
1261 | ||
1262 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) | |
1263 | { | |
1264 | int retval = -ENOMEM; | |
1265 | ||
1266 | /* | |
1267 | * Let the driver probe the device to detect the capabilities. | |
1268 | */ | |
1269 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1270 | if (retval) { | |
1271 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1272 | goto exit; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Initialize configuration work. | |
1277 | */ | |
1278 | INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled); | |
4150c572 | 1279 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
5c58ee51 | 1280 | INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled); |
95ea3627 ID |
1281 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1282 | ||
1283 | /* | |
1284 | * Reset current working type. | |
1285 | */ | |
d28c2561 | 1286 | rt2x00dev->interface.type = IEEE80211_IF_TYPE_INVALID; |
95ea3627 ID |
1287 | |
1288 | /* | |
1289 | * Allocate ring array. | |
1290 | */ | |
1291 | retval = rt2x00lib_alloc_rings(rt2x00dev); | |
1292 | if (retval) | |
1293 | goto exit; | |
1294 | ||
1295 | /* | |
1296 | * Initialize ieee80211 structure. | |
1297 | */ | |
1298 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1299 | if (retval) { | |
1300 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1301 | goto exit; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * Allocatie rfkill. | |
1306 | */ | |
1307 | retval = rt2x00rfkill_allocate(rt2x00dev); | |
1308 | if (retval) | |
1309 | goto exit; | |
1310 | ||
1311 | /* | |
1312 | * Open the debugfs entry. | |
1313 | */ | |
1314 | rt2x00debug_register(rt2x00dev); | |
1315 | ||
066cb637 ID |
1316 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1317 | ||
95ea3627 ID |
1318 | return 0; |
1319 | ||
1320 | exit: | |
1321 | rt2x00lib_remove_dev(rt2x00dev); | |
1322 | ||
1323 | return retval; | |
1324 | } | |
1325 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1326 | ||
1327 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1328 | { | |
066cb637 ID |
1329 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1330 | ||
95ea3627 ID |
1331 | /* |
1332 | * Disable radio. | |
1333 | */ | |
1334 | rt2x00lib_disable_radio(rt2x00dev); | |
1335 | ||
1336 | /* | |
1337 | * Uninitialize device. | |
1338 | */ | |
1339 | rt2x00lib_uninitialize(rt2x00dev); | |
1340 | ||
1341 | /* | |
1342 | * Close debugfs entry. | |
1343 | */ | |
1344 | rt2x00debug_deregister(rt2x00dev); | |
1345 | ||
1346 | /* | |
1347 | * Free rfkill | |
1348 | */ | |
1349 | rt2x00rfkill_free(rt2x00dev); | |
1350 | ||
1351 | /* | |
1352 | * Free ieee80211_hw memory. | |
1353 | */ | |
1354 | rt2x00lib_remove_hw(rt2x00dev); | |
1355 | ||
1356 | /* | |
1357 | * Free firmware image. | |
1358 | */ | |
1359 | rt2x00lib_free_firmware(rt2x00dev); | |
1360 | ||
1361 | /* | |
1362 | * Free ring structures. | |
1363 | */ | |
1364 | rt2x00lib_free_rings(rt2x00dev); | |
1365 | } | |
1366 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1367 | ||
1368 | /* | |
1369 | * Device state handlers | |
1370 | */ | |
1371 | #ifdef CONFIG_PM | |
1372 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1373 | { | |
1374 | int retval; | |
1375 | ||
1376 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1377 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1378 | ||
1379 | /* | |
1380 | * Only continue if mac80211 has open interfaces. | |
1381 | */ | |
1382 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1383 | goto exit; | |
6d7f9877 | 1384 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1385 | |
1386 | /* | |
1387 | * Disable radio and unitialize all items | |
1388 | * that must be recreated on resume. | |
1389 | */ | |
e37ea213 | 1390 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
1391 | rt2x00lib_uninitialize(rt2x00dev); |
1392 | rt2x00debug_deregister(rt2x00dev); | |
1393 | ||
066cb637 | 1394 | exit: |
95ea3627 ID |
1395 | /* |
1396 | * Set device mode to sleep for power management. | |
1397 | */ | |
1398 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1399 | if (retval) | |
1400 | return retval; | |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1405 | ||
1406 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) | |
1407 | { | |
1408 | struct interface *intf = &rt2x00dev->interface; | |
1409 | int retval; | |
1410 | ||
1411 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1412 | |
1413 | /* | |
1414 | * Open the debugfs entry. | |
1415 | */ | |
1416 | rt2x00debug_register(rt2x00dev); | |
1417 | ||
066cb637 | 1418 | /* |
6d7f9877 | 1419 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1420 | */ |
6d7f9877 | 1421 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1422 | return 0; |
1423 | ||
95ea3627 ID |
1424 | /* |
1425 | * Reinitialize device and all active interfaces. | |
1426 | */ | |
e37ea213 | 1427 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1428 | if (retval) |
1429 | goto exit; | |
1430 | ||
1431 | /* | |
1432 | * Reconfigure device. | |
1433 | */ | |
066cb637 ID |
1434 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1435 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1436 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 ID |
1437 | |
1438 | rt2x00lib_config_mac_addr(rt2x00dev, intf->mac); | |
1439 | rt2x00lib_config_bssid(rt2x00dev, intf->bssid); | |
1440 | rt2x00lib_config_type(rt2x00dev, intf->type); | |
95ea3627 | 1441 | |
e37ea213 ID |
1442 | /* |
1443 | * We are ready again to receive requests from mac80211. | |
1444 | */ | |
1445 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1446 | ||
066cb637 ID |
1447 | /* |
1448 | * It is possible that during that mac80211 has attempted | |
1449 | * to send frames while we were suspending or resuming. | |
1450 | * In that case we have disabled the TX queue and should | |
1451 | * now enable it again | |
1452 | */ | |
1453 | ieee80211_start_queues(rt2x00dev->hw); | |
1454 | ||
95ea3627 ID |
1455 | /* |
1456 | * When in Master or Ad-hoc mode, | |
1457 | * restart Beacon transmitting by faking a beacondone event. | |
1458 | */ | |
1459 | if (intf->type == IEEE80211_IF_TYPE_AP || | |
1460 | intf->type == IEEE80211_IF_TYPE_IBSS) | |
1461 | rt2x00lib_beacondone(rt2x00dev); | |
1462 | ||
95ea3627 ID |
1463 | return 0; |
1464 | ||
1465 | exit: | |
1466 | rt2x00lib_disable_radio(rt2x00dev); | |
1467 | rt2x00lib_uninitialize(rt2x00dev); | |
1468 | rt2x00debug_deregister(rt2x00dev); | |
1469 | ||
95ea3627 ID |
1470 | return retval; |
1471 | } | |
1472 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1473 | #endif /* CONFIG_PM */ | |
1474 | ||
1475 | /* | |
1476 | * rt2x00lib module information. | |
1477 | */ | |
1478 | MODULE_AUTHOR(DRV_PROJECT); | |
1479 | MODULE_VERSION(DRV_VERSION); | |
1480 | MODULE_DESCRIPTION("rt2x00 library"); | |
1481 | MODULE_LICENSE("GPL"); |