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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 | ||
263 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) { | |
264 | if (sample_a > sample_b && rx == ANTENNA_B) | |
265 | rx = ANTENNA_A; | |
266 | else if (rx == ANTENNA_A) | |
267 | rx = ANTENNA_B; | |
268 | } | |
269 | ||
270 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) { | |
271 | if (sample_a > sample_b && tx == ANTENNA_B) | |
272 | tx = ANTENNA_A; | |
273 | else if (tx == ANTENNA_A) | |
274 | tx = ANTENNA_B; | |
275 | } | |
276 | ||
277 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
278 | } | |
279 | ||
280 | static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev) | |
281 | { | |
282 | enum antenna rx = rt2x00dev->link.ant.active.rx; | |
283 | enum antenna tx = rt2x00dev->link.ant.active.tx; | |
284 | int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link); | |
285 | int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr); | |
286 | ||
287 | /* | |
288 | * Legacy driver indicates that we should swap antenna's | |
289 | * when the difference in RSSI is greater that 5. This | |
290 | * also should be done when the RSSI was actually better | |
291 | * then the previous sample. | |
292 | * When the difference exceeds the threshold we should | |
293 | * sample the rssi from the other antenna to make a valid | |
294 | * comparison between the 2 antennas. | |
295 | */ | |
296 | if ((rssi_curr - rssi_old) > -5 || (rssi_curr - rssi_old) < 5) | |
297 | return; | |
298 | ||
299 | rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE; | |
300 | ||
301 | if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) | |
302 | rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
303 | ||
304 | if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) | |
305 | tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A; | |
306 | ||
307 | rt2x00lib_config_antenna(rt2x00dev, rx, tx); | |
308 | } | |
309 | ||
310 | static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev) | |
311 | { | |
312 | /* | |
313 | * Determine if software diversity is enabled for | |
314 | * either the TX or RX antenna (or both). | |
315 | * Always perform this check since within the link | |
316 | * tuner interval the configuration might have changed. | |
317 | */ | |
318 | rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY; | |
319 | rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY; | |
320 | ||
321 | if (rt2x00dev->hw->conf.antenna_sel_rx == 0 && | |
322 | rt2x00dev->default_ant.rx != ANTENNA_SW_DIVERSITY) | |
323 | rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY; | |
324 | if (rt2x00dev->hw->conf.antenna_sel_tx == 0 && | |
325 | rt2x00dev->default_ant.tx != ANTENNA_SW_DIVERSITY) | |
326 | rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY; | |
327 | ||
328 | if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) && | |
329 | !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) { | |
330 | rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE; | |
331 | return; | |
332 | } | |
333 | ||
334 | /* | |
335 | * If we have only sampled the data over the last period | |
336 | * we should now harvest the data. Otherwise just evaluate | |
337 | * the data. The latter should only be performed once | |
338 | * every 2 seconds. | |
339 | */ | |
340 | if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE) | |
341 | rt2x00lib_evaluate_antenna_sample(rt2x00dev); | |
342 | else if (rt2x00dev->link.count & 1) | |
343 | rt2x00lib_evaluate_antenna_eval(rt2x00dev); | |
344 | } | |
345 | ||
346 | static void rt2x00lib_update_link_stats(struct link *link, int rssi) | |
347 | { | |
348 | int avg_rssi = rssi; | |
349 | ||
350 | /* | |
351 | * Update global RSSI | |
352 | */ | |
353 | if (link->qual.avg_rssi) | |
354 | avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8); | |
355 | link->qual.avg_rssi = avg_rssi; | |
356 | ||
357 | /* | |
358 | * Update antenna RSSI | |
359 | */ | |
360 | if (link->ant.rssi_ant) | |
361 | rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8); | |
362 | link->ant.rssi_ant = rssi; | |
363 | } | |
364 | ||
ebcf26da | 365 | static void rt2x00lib_precalculate_link_signal(struct link_qual *qual) |
95ea3627 | 366 | { |
ebcf26da ID |
367 | if (qual->rx_failed || qual->rx_success) |
368 | qual->rx_percentage = | |
369 | (qual->rx_success * 100) / | |
370 | (qual->rx_failed + qual->rx_success); | |
95ea3627 | 371 | else |
ebcf26da | 372 | qual->rx_percentage = 50; |
95ea3627 | 373 | |
ebcf26da ID |
374 | if (qual->tx_failed || qual->tx_success) |
375 | qual->tx_percentage = | |
376 | (qual->tx_success * 100) / | |
377 | (qual->tx_failed + qual->tx_success); | |
95ea3627 | 378 | else |
ebcf26da | 379 | qual->tx_percentage = 50; |
95ea3627 | 380 | |
ebcf26da ID |
381 | qual->rx_success = 0; |
382 | qual->rx_failed = 0; | |
383 | qual->tx_success = 0; | |
384 | qual->tx_failed = 0; | |
95ea3627 ID |
385 | } |
386 | ||
387 | static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, | |
388 | int rssi) | |
389 | { | |
390 | int rssi_percentage = 0; | |
391 | int signal; | |
392 | ||
393 | /* | |
394 | * We need a positive value for the RSSI. | |
395 | */ | |
396 | if (rssi < 0) | |
397 | rssi += rt2x00dev->rssi_offset; | |
398 | ||
399 | /* | |
400 | * Calculate the different percentages, | |
401 | * which will be used for the signal. | |
402 | */ | |
403 | if (rt2x00dev->rssi_offset) | |
404 | rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; | |
405 | ||
406 | /* | |
407 | * Add the individual percentages and use the WEIGHT | |
408 | * defines to calculate the current link signal. | |
409 | */ | |
410 | signal = ((WEIGHT_RSSI * rssi_percentage) + | |
ebcf26da ID |
411 | (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) + |
412 | (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100; | |
95ea3627 ID |
413 | |
414 | return (signal > 100) ? 100 : signal; | |
415 | } | |
416 | ||
417 | static void rt2x00lib_link_tuner(struct work_struct *work) | |
418 | { | |
419 | struct rt2x00_dev *rt2x00dev = | |
420 | container_of(work, struct rt2x00_dev, link.work.work); | |
421 | ||
25ab002f ID |
422 | /* |
423 | * When the radio is shutting down we should | |
424 | * immediately cease all link tuning. | |
425 | */ | |
426 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
427 | return; | |
428 | ||
95ea3627 ID |
429 | /* |
430 | * Update statistics. | |
431 | */ | |
ebcf26da | 432 | rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual); |
95ea3627 | 433 | rt2x00dev->low_level_stats.dot11FCSErrorCount += |
ebcf26da | 434 | rt2x00dev->link.qual.rx_failed; |
95ea3627 | 435 | |
95ea3627 ID |
436 | /* |
437 | * Only perform the link tuning when Link tuning | |
438 | * has been enabled (This could have been disabled from the EEPROM). | |
439 | */ | |
440 | if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) | |
441 | rt2x00dev->ops->lib->link_tuner(rt2x00dev); | |
442 | ||
69f81a2c ID |
443 | /* |
444 | * Evaluate antenna setup. | |
445 | */ | |
446 | rt2x00lib_evaluate_antenna(rt2x00dev); | |
447 | ||
725d99d4 ID |
448 | /* |
449 | * Precalculate a portion of the link signal which is | |
450 | * in based on the tx/rx success/failure counters. | |
451 | */ | |
ebcf26da | 452 | rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual); |
725d99d4 | 453 | |
95ea3627 ID |
454 | /* |
455 | * Increase tuner counter, and reschedule the next link tuner run. | |
456 | */ | |
457 | rt2x00dev->link.count++; | |
458 | queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, | |
459 | LINK_TUNE_INTERVAL); | |
460 | } | |
461 | ||
4150c572 JB |
462 | static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) |
463 | { | |
464 | struct rt2x00_dev *rt2x00dev = | |
465 | container_of(work, struct rt2x00_dev, filter_work); | |
3c4f2085 | 466 | unsigned int filter = rt2x00dev->packet_filter; |
5886d0db ID |
467 | |
468 | /* | |
469 | * Since we had stored the filter inside interface.filter, | |
470 | * we should now clear that field. Otherwise the driver will | |
471 | * assume nothing has changed (*total_flags will be compared | |
472 | * to interface.filter to determine if any action is required). | |
473 | */ | |
3c4f2085 | 474 | rt2x00dev->packet_filter = 0; |
4150c572 JB |
475 | |
476 | rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw, | |
5886d0db | 477 | filter, &filter, 0, NULL); |
4150c572 JB |
478 | } |
479 | ||
5c58ee51 ID |
480 | static void rt2x00lib_configuration_scheduled(struct work_struct *work) |
481 | { | |
482 | struct rt2x00_dev *rt2x00dev = | |
483 | container_of(work, struct rt2x00_dev, config_work); | |
471b3efd | 484 | struct ieee80211_bss_conf bss_conf; |
5c58ee51 | 485 | |
471b3efd JB |
486 | bss_conf.use_short_preamble = |
487 | test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags); | |
488 | ||
489 | /* | |
490 | * FIXME: shouldn't invoke it this way because all other contents | |
491 | * of bss_conf is invalid. | |
492 | */ | |
493 | rt2x00mac_bss_info_changed(rt2x00dev->hw, rt2x00dev->interface.id, | |
494 | &bss_conf, BSS_CHANGED_ERP_PREAMBLE); | |
5c58ee51 ID |
495 | } |
496 | ||
95ea3627 ID |
497 | /* |
498 | * Interrupt context handlers. | |
499 | */ | |
500 | static void rt2x00lib_beacondone_scheduled(struct work_struct *work) | |
501 | { | |
502 | struct rt2x00_dev *rt2x00dev = | |
503 | container_of(work, struct rt2x00_dev, beacon_work); | |
504 | struct data_ring *ring = | |
505 | rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON); | |
506 | struct data_entry *entry = rt2x00_get_data_entry(ring); | |
507 | struct sk_buff *skb; | |
508 | ||
509 | skb = ieee80211_beacon_get(rt2x00dev->hw, | |
510 | rt2x00dev->interface.id, | |
511 | &entry->tx_status.control); | |
512 | if (!skb) | |
513 | return; | |
514 | ||
515 | rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, | |
516 | &entry->tx_status.control); | |
517 | ||
518 | dev_kfree_skb(skb); | |
519 | } | |
520 | ||
521 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
522 | { | |
523 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) | |
524 | return; | |
525 | ||
526 | queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work); | |
527 | } | |
528 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
529 | ||
530 | void rt2x00lib_txdone(struct data_entry *entry, | |
531 | const int status, const int retry) | |
532 | { | |
533 | struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; | |
534 | struct ieee80211_tx_status *tx_status = &entry->tx_status; | |
535 | struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats; | |
536 | int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY); | |
537 | int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID || | |
538 | status == TX_FAIL_OTHER); | |
539 | ||
540 | /* | |
541 | * Update TX statistics. | |
542 | */ | |
543 | tx_status->flags = 0; | |
544 | tx_status->ack_signal = 0; | |
545 | tx_status->excessive_retries = (status == TX_FAIL_RETRY); | |
546 | tx_status->retry_count = retry; | |
ebcf26da ID |
547 | rt2x00dev->link.qual.tx_success += success; |
548 | rt2x00dev->link.qual.tx_failed += retry + fail; | |
95ea3627 ID |
549 | |
550 | if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) { | |
551 | if (success) | |
552 | tx_status->flags |= IEEE80211_TX_STATUS_ACK; | |
553 | else | |
554 | stats->dot11ACKFailureCount++; | |
555 | } | |
556 | ||
557 | tx_status->queue_length = entry->ring->stats.limit; | |
558 | tx_status->queue_number = tx_status->control.queue; | |
559 | ||
560 | if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { | |
561 | if (success) | |
562 | stats->dot11RTSSuccessCount++; | |
563 | else | |
564 | stats->dot11RTSFailureCount++; | |
565 | } | |
566 | ||
567 | /* | |
4d8dd66c ID |
568 | * Send the tx_status to mac80211 & debugfs. |
569 | * mac80211 will clean up the skb structure. | |
95ea3627 | 570 | */ |
4d8dd66c ID |
571 | get_skb_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE; |
572 | rt2x00debug_dump_frame(rt2x00dev, entry->skb); | |
95ea3627 ID |
573 | ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status); |
574 | entry->skb = NULL; | |
575 | } | |
576 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
577 | ||
578 | void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb, | |
4150c572 | 579 | struct rxdata_entry_desc *desc) |
95ea3627 ID |
580 | { |
581 | struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; | |
582 | struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; | |
583 | struct ieee80211_hw_mode *mode; | |
584 | struct ieee80211_rate *rate; | |
61af43c5 | 585 | struct ieee80211_hdr *hdr; |
95ea3627 ID |
586 | unsigned int i; |
587 | int val = 0; | |
61af43c5 | 588 | u16 fc; |
95ea3627 ID |
589 | |
590 | /* | |
591 | * Update RX statistics. | |
592 | */ | |
593 | mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode]; | |
594 | for (i = 0; i < mode->num_rates; i++) { | |
595 | rate = &mode->rates[i]; | |
596 | ||
597 | /* | |
598 | * When frame was received with an OFDM bitrate, | |
599 | * the signal is the PLCP value. If it was received with | |
600 | * a CCK bitrate the signal is the rate in 0.5kbit/s. | |
601 | */ | |
4150c572 | 602 | if (!desc->ofdm) |
95ea3627 ID |
603 | val = DEVICE_GET_RATE_FIELD(rate->val, RATE); |
604 | else | |
605 | val = DEVICE_GET_RATE_FIELD(rate->val, PLCP); | |
606 | ||
4150c572 | 607 | if (val == desc->signal) { |
95ea3627 ID |
608 | val = rate->val; |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
61af43c5 | 613 | /* |
7e56d38d | 614 | * Only update link status if this is a beacon frame carrying our bssid. |
61af43c5 | 615 | */ |
7e56d38d ID |
616 | hdr = (struct ieee80211_hdr*)skb->data; |
617 | fc = le16_to_cpu(hdr->frame_control); | |
618 | if (is_beacon(fc) && desc->my_bss) | |
619 | rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi); | |
61af43c5 | 620 | |
ebcf26da | 621 | rt2x00dev->link.qual.rx_success++; |
69f81a2c | 622 | |
95ea3627 | 623 | rx_status->rate = val; |
4150c572 JB |
624 | rx_status->signal = |
625 | rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi); | |
626 | rx_status->ssi = desc->rssi; | |
627 | rx_status->flag = desc->flags; | |
69f81a2c | 628 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 ID |
629 | |
630 | /* | |
4d8dd66c | 631 | * Send frame to mac80211 & debugfs |
95ea3627 | 632 | */ |
4d8dd66c ID |
633 | get_skb_desc(skb)->frame_type = DUMP_FRAME_RXDONE; |
634 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
635 | ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status); |
636 | } | |
637 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
638 | ||
639 | /* | |
640 | * TX descriptor initializer | |
641 | */ | |
642 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
08992f7f | 643 | struct sk_buff *skb, |
95ea3627 ID |
644 | struct ieee80211_tx_control *control) |
645 | { | |
4150c572 | 646 | struct txdata_entry_desc desc; |
08992f7f ID |
647 | struct skb_desc *skbdesc = get_skb_desc(skb); |
648 | struct ieee80211_hdr *ieee80211hdr = skbdesc->data; | |
95ea3627 ID |
649 | int tx_rate; |
650 | int bitrate; | |
08992f7f | 651 | int length; |
95ea3627 ID |
652 | int duration; |
653 | int residual; | |
654 | u16 frame_control; | |
655 | u16 seq_ctrl; | |
656 | ||
08992f7f | 657 | memset(&desc, 0, sizeof(desc)); |
95ea3627 | 658 | |
08992f7f ID |
659 | desc.cw_min = skbdesc->ring->tx_params.cw_min; |
660 | desc.cw_max = skbdesc->ring->tx_params.cw_max; | |
661 | desc.aifs = skbdesc->ring->tx_params.aifs; | |
95ea3627 ID |
662 | |
663 | /* | |
664 | * Identify queue | |
665 | */ | |
666 | if (control->queue < rt2x00dev->hw->queues) | |
667 | desc.queue = control->queue; | |
668 | else if (control->queue == IEEE80211_TX_QUEUE_BEACON || | |
669 | control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON) | |
670 | desc.queue = QUEUE_MGMT; | |
671 | else | |
672 | desc.queue = QUEUE_OTHER; | |
673 | ||
674 | /* | |
675 | * Read required fields from ieee80211 header. | |
676 | */ | |
677 | frame_control = le16_to_cpu(ieee80211hdr->frame_control); | |
678 | seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl); | |
679 | ||
680 | tx_rate = control->tx_rate; | |
681 | ||
2700f8b0 MN |
682 | /* |
683 | * Check whether this frame is to be acked | |
684 | */ | |
685 | if (!(control->flags & IEEE80211_TXCTL_NO_ACK)) | |
686 | __set_bit(ENTRY_TXD_ACK, &desc.flags); | |
687 | ||
95ea3627 ID |
688 | /* |
689 | * Check if this is a RTS/CTS frame | |
690 | */ | |
691 | if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { | |
692 | __set_bit(ENTRY_TXD_BURST, &desc.flags); | |
2700f8b0 | 693 | if (is_rts_frame(frame_control)) { |
95ea3627 | 694 | __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags); |
2700f8b0 MN |
695 | __set_bit(ENTRY_TXD_ACK, &desc.flags); |
696 | } else | |
697 | __clear_bit(ENTRY_TXD_ACK, &desc.flags); | |
95ea3627 ID |
698 | if (control->rts_cts_rate) |
699 | tx_rate = control->rts_cts_rate; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Check for OFDM | |
704 | */ | |
705 | if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK) | |
706 | __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags); | |
707 | ||
708 | /* | |
709 | * Check if more fragments are pending | |
710 | */ | |
711 | if (ieee80211_get_morefrag(ieee80211hdr)) { | |
712 | __set_bit(ENTRY_TXD_BURST, &desc.flags); | |
713 | __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags); | |
714 | } | |
715 | ||
716 | /* | |
717 | * Beacons and probe responses require the tsf timestamp | |
718 | * to be inserted into the frame. | |
719 | */ | |
720 | if (control->queue == IEEE80211_TX_QUEUE_BEACON || | |
721 | is_probe_resp(frame_control)) | |
722 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags); | |
723 | ||
724 | /* | |
725 | * Determine with what IFS priority this frame should be send. | |
726 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
727 | * or this fragment came after RTS/CTS. | |
728 | */ | |
729 | if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || | |
730 | test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags)) | |
731 | desc.ifs = IFS_SIFS; | |
732 | else | |
733 | desc.ifs = IFS_BACKOFF; | |
734 | ||
735 | /* | |
736 | * PLCP setup | |
737 | * Length calculation depends on OFDM/CCK rate. | |
738 | */ | |
739 | desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP); | |
740 | desc.service = 0x04; | |
741 | ||
08992f7f | 742 | length = skbdesc->data_len + FCS_LEN; |
95ea3627 | 743 | if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) { |
08992f7f ID |
744 | desc.length_high = (length >> 6) & 0x3f; |
745 | desc.length_low = length & 0x3f; | |
95ea3627 ID |
746 | } else { |
747 | bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE); | |
748 | ||
749 | /* | |
750 | * Convert length to microseconds. | |
751 | */ | |
08992f7f ID |
752 | residual = get_duration_res(length, bitrate); |
753 | duration = get_duration(length, bitrate); | |
95ea3627 ID |
754 | |
755 | if (residual != 0) { | |
756 | duration++; | |
757 | ||
758 | /* | |
759 | * Check if we need to set the Length Extension | |
760 | */ | |
db151787 | 761 | if (bitrate == 110 && residual <= 30) |
95ea3627 ID |
762 | desc.service |= 0x80; |
763 | } | |
764 | ||
765 | desc.length_high = (duration >> 8) & 0xff; | |
766 | desc.length_low = duration & 0xff; | |
767 | ||
768 | /* | |
769 | * When preamble is enabled we should set the | |
770 | * preamble bit for the signal. | |
771 | */ | |
772 | if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE)) | |
773 | desc.signal |= 0x08; | |
774 | } | |
775 | ||
dd3193e1 | 776 | rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &desc, control); |
08992f7f ID |
777 | |
778 | /* | |
779 | * Update ring entry. | |
780 | */ | |
781 | skbdesc->entry->skb = skb; | |
782 | memcpy(&skbdesc->entry->tx_status.control, control, sizeof(*control)); | |
4d8dd66c ID |
783 | |
784 | /* | |
785 | * The frame has been completely initialized and ready | |
786 | * for sending to the device. The caller will push the | |
787 | * frame to the device, but we are going to push the | |
788 | * frame to debugfs here. | |
789 | */ | |
790 | skbdesc->frame_type = DUMP_FRAME_TX; | |
791 | rt2x00debug_dump_frame(rt2x00dev, skb); | |
95ea3627 ID |
792 | } |
793 | EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); | |
794 | ||
795 | /* | |
796 | * Driver initialization handlers. | |
797 | */ | |
798 | static void rt2x00lib_channel(struct ieee80211_channel *entry, | |
799 | const int channel, const int tx_power, | |
800 | const int value) | |
801 | { | |
802 | entry->chan = channel; | |
803 | if (channel <= 14) | |
804 | entry->freq = 2407 + (5 * channel); | |
805 | else | |
806 | entry->freq = 5000 + (5 * channel); | |
807 | entry->val = value; | |
808 | entry->flag = | |
809 | IEEE80211_CHAN_W_IBSS | | |
810 | IEEE80211_CHAN_W_ACTIVE_SCAN | | |
811 | IEEE80211_CHAN_W_SCAN; | |
812 | entry->power_level = tx_power; | |
813 | entry->antenna_max = 0xff; | |
814 | } | |
815 | ||
816 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
817 | const int rate, const int mask, | |
818 | const int plcp, const int flags) | |
819 | { | |
820 | entry->rate = rate; | |
821 | entry->val = | |
822 | DEVICE_SET_RATE_FIELD(rate, RATE) | | |
823 | DEVICE_SET_RATE_FIELD(mask, RATEMASK) | | |
824 | DEVICE_SET_RATE_FIELD(plcp, PLCP); | |
825 | entry->flags = flags; | |
826 | entry->val2 = entry->val; | |
827 | if (entry->flags & IEEE80211_RATE_PREAMBLE2) | |
828 | entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE); | |
829 | entry->min_rssi_ack = 0; | |
830 | entry->min_rssi_ack_delta = 0; | |
831 | } | |
832 | ||
833 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
834 | struct hw_mode_spec *spec) | |
835 | { | |
836 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
837 | struct ieee80211_hw_mode *hwmodes; | |
838 | struct ieee80211_channel *channels; | |
839 | struct ieee80211_rate *rates; | |
840 | unsigned int i; | |
841 | unsigned char tx_power; | |
842 | ||
843 | hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL); | |
844 | if (!hwmodes) | |
845 | goto exit; | |
846 | ||
847 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
848 | if (!channels) | |
849 | goto exit_free_modes; | |
850 | ||
851 | rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL); | |
852 | if (!rates) | |
853 | goto exit_free_channels; | |
854 | ||
855 | /* | |
856 | * Initialize Rate list. | |
857 | */ | |
858 | rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB, | |
859 | 0x00, IEEE80211_RATE_CCK); | |
860 | rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB, | |
861 | 0x01, IEEE80211_RATE_CCK_2); | |
862 | rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB, | |
863 | 0x02, IEEE80211_RATE_CCK_2); | |
864 | rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB, | |
865 | 0x03, IEEE80211_RATE_CCK_2); | |
866 | ||
867 | if (spec->num_rates > 4) { | |
868 | rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB, | |
869 | 0x0b, IEEE80211_RATE_OFDM); | |
870 | rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB, | |
871 | 0x0f, IEEE80211_RATE_OFDM); | |
872 | rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB, | |
873 | 0x0a, IEEE80211_RATE_OFDM); | |
874 | rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB, | |
875 | 0x0e, IEEE80211_RATE_OFDM); | |
876 | rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB, | |
877 | 0x09, IEEE80211_RATE_OFDM); | |
878 | rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB, | |
879 | 0x0d, IEEE80211_RATE_OFDM); | |
880 | rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB, | |
881 | 0x08, IEEE80211_RATE_OFDM); | |
882 | rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB, | |
883 | 0x0c, IEEE80211_RATE_OFDM); | |
884 | } | |
885 | ||
886 | /* | |
887 | * Initialize Channel list. | |
888 | */ | |
889 | for (i = 0; i < spec->num_channels; i++) { | |
890 | if (spec->channels[i].channel <= 14) | |
891 | tx_power = spec->tx_power_bg[i]; | |
892 | else if (spec->tx_power_a) | |
893 | tx_power = spec->tx_power_a[i]; | |
894 | else | |
895 | tx_power = spec->tx_power_default; | |
896 | ||
897 | rt2x00lib_channel(&channels[i], | |
898 | spec->channels[i].channel, tx_power, i); | |
899 | } | |
900 | ||
901 | /* | |
902 | * Intitialize 802.11b | |
903 | * Rates: CCK. | |
904 | * Channels: OFDM. | |
905 | */ | |
906 | if (spec->num_modes > HWMODE_B) { | |
907 | hwmodes[HWMODE_B].mode = MODE_IEEE80211B; | |
908 | hwmodes[HWMODE_B].num_channels = 14; | |
909 | hwmodes[HWMODE_B].num_rates = 4; | |
910 | hwmodes[HWMODE_B].channels = channels; | |
911 | hwmodes[HWMODE_B].rates = rates; | |
912 | } | |
913 | ||
914 | /* | |
915 | * Intitialize 802.11g | |
916 | * Rates: CCK, OFDM. | |
917 | * Channels: OFDM. | |
918 | */ | |
919 | if (spec->num_modes > HWMODE_G) { | |
920 | hwmodes[HWMODE_G].mode = MODE_IEEE80211G; | |
921 | hwmodes[HWMODE_G].num_channels = 14; | |
922 | hwmodes[HWMODE_G].num_rates = spec->num_rates; | |
923 | hwmodes[HWMODE_G].channels = channels; | |
924 | hwmodes[HWMODE_G].rates = rates; | |
925 | } | |
926 | ||
927 | /* | |
928 | * Intitialize 802.11a | |
929 | * Rates: OFDM. | |
930 | * Channels: OFDM, UNII, HiperLAN2. | |
931 | */ | |
932 | if (spec->num_modes > HWMODE_A) { | |
933 | hwmodes[HWMODE_A].mode = MODE_IEEE80211A; | |
934 | hwmodes[HWMODE_A].num_channels = spec->num_channels - 14; | |
935 | hwmodes[HWMODE_A].num_rates = spec->num_rates - 4; | |
936 | hwmodes[HWMODE_A].channels = &channels[14]; | |
937 | hwmodes[HWMODE_A].rates = &rates[4]; | |
938 | } | |
939 | ||
940 | if (spec->num_modes > HWMODE_G && | |
941 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G])) | |
942 | goto exit_free_rates; | |
943 | ||
944 | if (spec->num_modes > HWMODE_B && | |
945 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B])) | |
946 | goto exit_free_rates; | |
947 | ||
948 | if (spec->num_modes > HWMODE_A && | |
949 | ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A])) | |
950 | goto exit_free_rates; | |
951 | ||
952 | rt2x00dev->hwmodes = hwmodes; | |
953 | ||
954 | return 0; | |
955 | ||
956 | exit_free_rates: | |
957 | kfree(rates); | |
958 | ||
959 | exit_free_channels: | |
960 | kfree(channels); | |
961 | ||
962 | exit_free_modes: | |
963 | kfree(hwmodes); | |
964 | ||
965 | exit: | |
966 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); | |
967 | return -ENOMEM; | |
968 | } | |
969 | ||
970 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
971 | { | |
066cb637 | 972 | if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
973 | ieee80211_unregister_hw(rt2x00dev->hw); |
974 | ||
975 | if (likely(rt2x00dev->hwmodes)) { | |
976 | kfree(rt2x00dev->hwmodes->channels); | |
977 | kfree(rt2x00dev->hwmodes->rates); | |
978 | kfree(rt2x00dev->hwmodes); | |
979 | rt2x00dev->hwmodes = NULL; | |
980 | } | |
981 | } | |
982 | ||
983 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
984 | { | |
985 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
986 | int status; | |
987 | ||
988 | /* | |
989 | * Initialize HW modes. | |
990 | */ | |
991 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
992 | if (status) | |
993 | return status; | |
994 | ||
995 | /* | |
996 | * Register HW. | |
997 | */ | |
998 | status = ieee80211_register_hw(rt2x00dev->hw); | |
999 | if (status) { | |
1000 | rt2x00lib_remove_hw(rt2x00dev); | |
1001 | return status; | |
1002 | } | |
1003 | ||
066cb637 | 1004 | __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
1005 | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Initialization/uninitialization handlers. | |
1011 | */ | |
1012 | static int rt2x00lib_alloc_entries(struct data_ring *ring, | |
1013 | const u16 max_entries, const u16 data_size, | |
1014 | const u16 desc_size) | |
1015 | { | |
1016 | struct data_entry *entry; | |
1017 | unsigned int i; | |
1018 | ||
1019 | ring->stats.limit = max_entries; | |
1020 | ring->data_size = data_size; | |
1021 | ring->desc_size = desc_size; | |
1022 | ||
1023 | /* | |
1024 | * Allocate all ring entries. | |
1025 | */ | |
1026 | entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL); | |
1027 | if (!entry) | |
1028 | return -ENOMEM; | |
1029 | ||
1030 | for (i = 0; i < ring->stats.limit; i++) { | |
1031 | entry[i].flags = 0; | |
1032 | entry[i].ring = ring; | |
1033 | entry[i].skb = NULL; | |
04267104 | 1034 | entry[i].entry_idx = i; |
95ea3627 ID |
1035 | } |
1036 | ||
1037 | ring->entry = entry; | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev) | |
1043 | { | |
1044 | struct data_ring *ring; | |
1045 | ||
1046 | /* | |
1047 | * Allocate the RX ring. | |
1048 | */ | |
1049 | if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE, | |
1050 | rt2x00dev->ops->rxd_size)) | |
1051 | return -ENOMEM; | |
1052 | ||
1053 | /* | |
1054 | * First allocate the TX rings. | |
1055 | */ | |
1056 | txring_for_each(rt2x00dev, ring) { | |
1057 | if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE, | |
1058 | rt2x00dev->ops->txd_size)) | |
1059 | return -ENOMEM; | |
1060 | } | |
1061 | ||
066cb637 | 1062 | if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) |
95ea3627 ID |
1063 | return 0; |
1064 | ||
1065 | /* | |
1066 | * Allocate the BEACON ring. | |
1067 | */ | |
1068 | if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES, | |
1069 | MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size)) | |
1070 | return -ENOMEM; | |
1071 | ||
1072 | /* | |
1073 | * Allocate the Atim ring. | |
1074 | */ | |
1075 | if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES, | |
1076 | DATA_FRAME_SIZE, rt2x00dev->ops->txd_size)) | |
1077 | return -ENOMEM; | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev) | |
1083 | { | |
1084 | struct data_ring *ring; | |
1085 | ||
1086 | ring_for_each(rt2x00dev, ring) { | |
1087 | kfree(ring->entry); | |
1088 | ring->entry = NULL; | |
1089 | } | |
1090 | } | |
1091 | ||
e37ea213 | 1092 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1093 | { |
1094 | if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1095 | return; | |
1096 | ||
1097 | /* | |
1098 | * Unregister rfkill. | |
1099 | */ | |
1100 | rt2x00rfkill_unregister(rt2x00dev); | |
1101 | ||
1102 | /* | |
1103 | * Allow the HW to uninitialize. | |
1104 | */ | |
1105 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1106 | ||
1107 | /* | |
1108 | * Free allocated ring entries. | |
1109 | */ | |
1110 | rt2x00lib_free_ring_entries(rt2x00dev); | |
1111 | } | |
1112 | ||
e37ea213 | 1113 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1114 | { |
1115 | int status; | |
1116 | ||
1117 | if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) | |
1118 | return 0; | |
1119 | ||
1120 | /* | |
1121 | * Allocate all ring entries. | |
1122 | */ | |
1123 | status = rt2x00lib_alloc_ring_entries(rt2x00dev); | |
1124 | if (status) { | |
1125 | ERROR(rt2x00dev, "Ring entries allocation failed.\n"); | |
1126 | return status; | |
1127 | } | |
1128 | ||
1129 | /* | |
1130 | * Initialize the device. | |
1131 | */ | |
1132 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
1133 | if (status) | |
1134 | goto exit; | |
1135 | ||
1136 | __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); | |
1137 | ||
1138 | /* | |
1139 | * Register the rfkill handler. | |
1140 | */ | |
1141 | status = rt2x00rfkill_register(rt2x00dev); | |
1142 | if (status) | |
1143 | goto exit_unitialize; | |
1144 | ||
1145 | return 0; | |
1146 | ||
1147 | exit_unitialize: | |
1148 | rt2x00lib_uninitialize(rt2x00dev); | |
1149 | ||
1150 | exit: | |
1151 | rt2x00lib_free_ring_entries(rt2x00dev); | |
1152 | ||
1153 | return status; | |
1154 | } | |
1155 | ||
e37ea213 ID |
1156 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1157 | { | |
1158 | int retval; | |
1159 | ||
1160 | if (test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1161 | return 0; | |
1162 | ||
1163 | /* | |
1164 | * If this is the first interface which is added, | |
1165 | * we should load the firmware now. | |
1166 | */ | |
1167 | if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) { | |
1168 | retval = rt2x00lib_load_firmware(rt2x00dev); | |
1169 | if (retval) | |
1170 | return retval; | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Initialize the device. | |
1175 | */ | |
1176 | retval = rt2x00lib_initialize(rt2x00dev); | |
1177 | if (retval) | |
1178 | return retval; | |
1179 | ||
1180 | /* | |
1181 | * Enable radio. | |
1182 | */ | |
1183 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1184 | if (retval) { | |
1185 | rt2x00lib_uninitialize(rt2x00dev); | |
1186 | return retval; | |
1187 | } | |
1188 | ||
1189 | __set_bit(DEVICE_STARTED, &rt2x00dev->flags); | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1195 | { | |
1196 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1197 | return; | |
1198 | ||
1199 | /* | |
1200 | * Perhaps we can add something smarter here, | |
1201 | * but for now just disabling the radio should do. | |
1202 | */ | |
1203 | rt2x00lib_disable_radio(rt2x00dev); | |
1204 | ||
1205 | __clear_bit(DEVICE_STARTED, &rt2x00dev->flags); | |
1206 | } | |
1207 | ||
95ea3627 ID |
1208 | /* |
1209 | * driver allocation handlers. | |
1210 | */ | |
1211 | static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev) | |
1212 | { | |
1213 | struct data_ring *ring; | |
04267104 | 1214 | unsigned int index; |
95ea3627 ID |
1215 | |
1216 | /* | |
1217 | * We need the following rings: | |
1218 | * RX: 1 | |
1219 | * TX: hw->queues | |
1220 | * Beacon: 1 (if required) | |
1221 | * Atim: 1 (if required) | |
1222 | */ | |
1223 | rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues + | |
066cb637 | 1224 | (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)); |
95ea3627 ID |
1225 | |
1226 | ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL); | |
1227 | if (!ring) { | |
1228 | ERROR(rt2x00dev, "Ring allocation failed.\n"); | |
1229 | return -ENOMEM; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * Initialize pointers | |
1234 | */ | |
1235 | rt2x00dev->rx = ring; | |
1236 | rt2x00dev->tx = &rt2x00dev->rx[1]; | |
066cb637 | 1237 | if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) |
95ea3627 ID |
1238 | rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues]; |
1239 | ||
1240 | /* | |
1241 | * Initialize ring parameters. | |
1242 | * cw_min: 2^5 = 32. | |
1243 | * cw_max: 2^10 = 1024. | |
1244 | */ | |
04267104 | 1245 | index = 0; |
95ea3627 ID |
1246 | ring_for_each(rt2x00dev, ring) { |
1247 | ring->rt2x00dev = rt2x00dev; | |
04267104 | 1248 | ring->queue_idx = index++; |
95ea3627 ID |
1249 | ring->tx_params.aifs = 2; |
1250 | ring->tx_params.cw_min = 5; | |
1251 | ring->tx_params.cw_max = 10; | |
1252 | } | |
1253 | ||
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev) | |
1258 | { | |
1259 | kfree(rt2x00dev->rx); | |
1260 | rt2x00dev->rx = NULL; | |
1261 | rt2x00dev->tx = NULL; | |
1262 | rt2x00dev->bcn = NULL; | |
1263 | } | |
1264 | ||
1265 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) | |
1266 | { | |
1267 | int retval = -ENOMEM; | |
1268 | ||
1269 | /* | |
1270 | * Let the driver probe the device to detect the capabilities. | |
1271 | */ | |
1272 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1273 | if (retval) { | |
1274 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1275 | goto exit; | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Initialize configuration work. | |
1280 | */ | |
1281 | INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled); | |
4150c572 | 1282 | INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); |
5c58ee51 | 1283 | INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled); |
95ea3627 ID |
1284 | INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); |
1285 | ||
1286 | /* | |
1287 | * Reset current working type. | |
1288 | */ | |
d28c2561 | 1289 | rt2x00dev->interface.type = IEEE80211_IF_TYPE_INVALID; |
95ea3627 ID |
1290 | |
1291 | /* | |
1292 | * Allocate ring array. | |
1293 | */ | |
1294 | retval = rt2x00lib_alloc_rings(rt2x00dev); | |
1295 | if (retval) | |
1296 | goto exit; | |
1297 | ||
1298 | /* | |
1299 | * Initialize ieee80211 structure. | |
1300 | */ | |
1301 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1302 | if (retval) { | |
1303 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1304 | goto exit; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Allocatie rfkill. | |
1309 | */ | |
1310 | retval = rt2x00rfkill_allocate(rt2x00dev); | |
1311 | if (retval) | |
1312 | goto exit; | |
1313 | ||
1314 | /* | |
1315 | * Open the debugfs entry. | |
1316 | */ | |
1317 | rt2x00debug_register(rt2x00dev); | |
1318 | ||
066cb637 ID |
1319 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1320 | ||
95ea3627 ID |
1321 | return 0; |
1322 | ||
1323 | exit: | |
1324 | rt2x00lib_remove_dev(rt2x00dev); | |
1325 | ||
1326 | return retval; | |
1327 | } | |
1328 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1329 | ||
1330 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1331 | { | |
066cb637 ID |
1332 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1333 | ||
95ea3627 ID |
1334 | /* |
1335 | * Disable radio. | |
1336 | */ | |
1337 | rt2x00lib_disable_radio(rt2x00dev); | |
1338 | ||
1339 | /* | |
1340 | * Uninitialize device. | |
1341 | */ | |
1342 | rt2x00lib_uninitialize(rt2x00dev); | |
1343 | ||
1344 | /* | |
1345 | * Close debugfs entry. | |
1346 | */ | |
1347 | rt2x00debug_deregister(rt2x00dev); | |
1348 | ||
1349 | /* | |
1350 | * Free rfkill | |
1351 | */ | |
1352 | rt2x00rfkill_free(rt2x00dev); | |
1353 | ||
1354 | /* | |
1355 | * Free ieee80211_hw memory. | |
1356 | */ | |
1357 | rt2x00lib_remove_hw(rt2x00dev); | |
1358 | ||
1359 | /* | |
1360 | * Free firmware image. | |
1361 | */ | |
1362 | rt2x00lib_free_firmware(rt2x00dev); | |
1363 | ||
1364 | /* | |
1365 | * Free ring structures. | |
1366 | */ | |
1367 | rt2x00lib_free_rings(rt2x00dev); | |
1368 | } | |
1369 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1370 | ||
1371 | /* | |
1372 | * Device state handlers | |
1373 | */ | |
1374 | #ifdef CONFIG_PM | |
1375 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1376 | { | |
1377 | int retval; | |
1378 | ||
1379 | NOTICE(rt2x00dev, "Going to sleep.\n"); | |
066cb637 ID |
1380 | __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); |
1381 | ||
1382 | /* | |
1383 | * Only continue if mac80211 has open interfaces. | |
1384 | */ | |
1385 | if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) | |
1386 | goto exit; | |
6d7f9877 | 1387 | __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); |
95ea3627 ID |
1388 | |
1389 | /* | |
1390 | * Disable radio and unitialize all items | |
1391 | * that must be recreated on resume. | |
1392 | */ | |
e37ea213 | 1393 | rt2x00lib_stop(rt2x00dev); |
95ea3627 ID |
1394 | rt2x00lib_uninitialize(rt2x00dev); |
1395 | rt2x00debug_deregister(rt2x00dev); | |
1396 | ||
066cb637 | 1397 | exit: |
95ea3627 ID |
1398 | /* |
1399 | * Set device mode to sleep for power management. | |
1400 | */ | |
1401 | retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); | |
1402 | if (retval) | |
1403 | return retval; | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1408 | ||
1409 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) | |
1410 | { | |
1411 | struct interface *intf = &rt2x00dev->interface; | |
1412 | int retval; | |
1413 | ||
1414 | NOTICE(rt2x00dev, "Waking up.\n"); | |
95ea3627 ID |
1415 | |
1416 | /* | |
1417 | * Open the debugfs entry. | |
1418 | */ | |
1419 | rt2x00debug_register(rt2x00dev); | |
1420 | ||
066cb637 | 1421 | /* |
6d7f9877 | 1422 | * Only continue if mac80211 had open interfaces. |
066cb637 | 1423 | */ |
6d7f9877 | 1424 | if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) |
066cb637 ID |
1425 | return 0; |
1426 | ||
95ea3627 ID |
1427 | /* |
1428 | * Reinitialize device and all active interfaces. | |
1429 | */ | |
e37ea213 | 1430 | retval = rt2x00lib_start(rt2x00dev); |
95ea3627 ID |
1431 | if (retval) |
1432 | goto exit; | |
1433 | ||
1434 | /* | |
1435 | * Reconfigure device. | |
1436 | */ | |
066cb637 ID |
1437 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); |
1438 | if (!rt2x00dev->hw->conf.radio_enabled) | |
1439 | rt2x00lib_disable_radio(rt2x00dev); | |
95ea3627 ID |
1440 | |
1441 | rt2x00lib_config_mac_addr(rt2x00dev, intf->mac); | |
1442 | rt2x00lib_config_bssid(rt2x00dev, intf->bssid); | |
1443 | rt2x00lib_config_type(rt2x00dev, intf->type); | |
95ea3627 | 1444 | |
e37ea213 ID |
1445 | /* |
1446 | * We are ready again to receive requests from mac80211. | |
1447 | */ | |
1448 | __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); | |
1449 | ||
066cb637 ID |
1450 | /* |
1451 | * It is possible that during that mac80211 has attempted | |
1452 | * to send frames while we were suspending or resuming. | |
1453 | * In that case we have disabled the TX queue and should | |
1454 | * now enable it again | |
1455 | */ | |
1456 | ieee80211_start_queues(rt2x00dev->hw); | |
1457 | ||
95ea3627 ID |
1458 | /* |
1459 | * When in Master or Ad-hoc mode, | |
1460 | * restart Beacon transmitting by faking a beacondone event. | |
1461 | */ | |
1462 | if (intf->type == IEEE80211_IF_TYPE_AP || | |
1463 | intf->type == IEEE80211_IF_TYPE_IBSS) | |
1464 | rt2x00lib_beacondone(rt2x00dev); | |
1465 | ||
95ea3627 ID |
1466 | return 0; |
1467 | ||
1468 | exit: | |
1469 | rt2x00lib_disable_radio(rt2x00dev); | |
1470 | rt2x00lib_uninitialize(rt2x00dev); | |
1471 | rt2x00debug_deregister(rt2x00dev); | |
1472 | ||
95ea3627 ID |
1473 | return retval; |
1474 | } | |
1475 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1476 | #endif /* CONFIG_PM */ | |
1477 | ||
1478 | /* | |
1479 | * rt2x00lib module information. | |
1480 | */ | |
1481 | MODULE_AUTHOR(DRV_PROJECT); | |
1482 | MODULE_VERSION(DRV_VERSION); | |
1483 | MODULE_DESCRIPTION("rt2x00 library"); | |
1484 | MODULE_LICENSE("GPL"); |