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95ea3627 | 1 | /* |
7e613e16 ID |
2 | Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
3 | Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> | |
95ea3627 ID |
4 | <http://rt2x00.serialmonkey.com> |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the | |
18 | Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | /* | |
23 | Module: rt2x00lib | |
24 | Abstract: rt2x00 generic device routines. | |
25 | */ | |
26 | ||
95ea3627 ID |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
95ea3627 ID |
30 | |
31 | #include "rt2x00.h" | |
32 | #include "rt2x00lib.h" | |
33 | ||
95ea3627 ID |
34 | /* |
35 | * Radio control handlers. | |
36 | */ | |
37 | int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) | |
38 | { | |
39 | int status; | |
40 | ||
41 | /* | |
42 | * Don't enable the radio twice. | |
43 | * And check if the hardware button has been disabled. | |
44 | */ | |
4b9631a4 | 45 | if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
46 | return 0; |
47 | ||
837e7f24 | 48 | /* |
181d6902 | 49 | * Initialize all data queues. |
837e7f24 | 50 | */ |
798b7adb | 51 | rt2x00queue_init_queues(rt2x00dev); |
837e7f24 | 52 | |
95ea3627 ID |
53 | /* |
54 | * Enable radio. | |
55 | */ | |
a2e1d52a ID |
56 | status = |
57 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON); | |
95ea3627 ID |
58 | if (status) |
59 | return status; | |
60 | ||
2b08da3f ID |
61 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON); |
62 | ||
a2e1d52a | 63 | rt2x00leds_led_radio(rt2x00dev, true); |
61c2b682 | 64 | rt2x00led_led_activity(rt2x00dev, true); |
a2e1d52a | 65 | |
0262ab0d | 66 | set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags); |
95ea3627 ID |
67 | |
68 | /* | |
69 | * Enable RX. | |
70 | */ | |
5cbf830e | 71 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); |
95ea3627 | 72 | |
c965c74b ID |
73 | /* |
74 | * Start watchdog monitoring. | |
75 | */ | |
76 | rt2x00link_start_watchdog(rt2x00dev); | |
77 | ||
95ea3627 ID |
78 | /* |
79 | * Start the TX queues. | |
80 | */ | |
36d6825b | 81 | ieee80211_wake_queues(rt2x00dev->hw); |
95ea3627 ID |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
86 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
87 | { | |
0262ab0d | 88 | if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
89 | return; |
90 | ||
95ea3627 | 91 | /* |
a2c9b652 | 92 | * Stop the TX queues in mac80211. |
95ea3627 ID |
93 | */ |
94 | ieee80211_stop_queues(rt2x00dev->hw); | |
a2c9b652 | 95 | rt2x00queue_stop_queues(rt2x00dev); |
95ea3627 | 96 | |
c965c74b ID |
97 | /* |
98 | * Stop watchdog monitoring. | |
99 | */ | |
100 | rt2x00link_stop_watchdog(rt2x00dev); | |
101 | ||
95ea3627 ID |
102 | /* |
103 | * Disable RX. | |
104 | */ | |
5cbf830e | 105 | rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); |
95ea3627 ID |
106 | |
107 | /* | |
108 | * Disable radio. | |
109 | */ | |
110 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
2b08da3f | 111 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF); |
61c2b682 | 112 | rt2x00led_led_activity(rt2x00dev, false); |
a2e1d52a | 113 | rt2x00leds_led_radio(rt2x00dev, false); |
95ea3627 ID |
114 | } |
115 | ||
5cbf830e | 116 | void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) |
95ea3627 | 117 | { |
95ea3627 ID |
118 | /* |
119 | * When we are disabling the RX, we should also stop the link tuner. | |
120 | */ | |
5cbf830e | 121 | if (state == STATE_RADIO_RX_OFF) |
84e3196f | 122 | rt2x00link_stop_tuner(rt2x00dev); |
95ea3627 ID |
123 | |
124 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); | |
125 | ||
126 | /* | |
127 | * When we are enabling the RX, we should also start the link tuner. | |
128 | */ | |
84e3196f ID |
129 | if (state == STATE_RADIO_RX_ON) |
130 | rt2x00link_start_tuner(rt2x00dev); | |
95ea3627 ID |
131 | } |
132 | ||
6bb40dd1 ID |
133 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
134 | struct ieee80211_vif *vif) | |
5c58ee51 | 135 | { |
6bb40dd1 ID |
136 | struct rt2x00_dev *rt2x00dev = data; |
137 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
6bb40dd1 ID |
138 | int delayed_flags; |
139 | ||
140 | /* | |
141 | * Copy all data we need during this action under the protection | |
142 | * of a spinlock. Otherwise race conditions might occur which results | |
143 | * into an invalid configuration. | |
144 | */ | |
145 | spin_lock(&intf->lock); | |
146 | ||
6bb40dd1 ID |
147 | delayed_flags = intf->delayed_flags; |
148 | intf->delayed_flags = 0; | |
149 | ||
150 | spin_unlock(&intf->lock); | |
151 | ||
980dfcb9 ID |
152 | /* |
153 | * It is possible the radio was disabled while the work had been | |
154 | * scheduled. If that happens we should return here immediately, | |
155 | * note that in the spinlock protected area above the delayed_flags | |
156 | * have been cleared correctly. | |
157 | */ | |
0262ab0d | 158 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
980dfcb9 ID |
159 | return; |
160 | ||
bd88a781 | 161 | if (delayed_flags & DELAYED_UPDATE_BEACON) |
a2c9b652 | 162 | rt2x00queue_update_beacon(rt2x00dev, vif, true); |
6bb40dd1 | 163 | } |
5c58ee51 | 164 | |
6bb40dd1 ID |
165 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
166 | { | |
167 | struct rt2x00_dev *rt2x00dev = | |
168 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
169 | |
170 | /* | |
6bb40dd1 ID |
171 | * Iterate over each interface and perform the |
172 | * requested configurations. | |
471b3efd | 173 | */ |
6bb40dd1 ID |
174 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
175 | rt2x00lib_intf_scheduled_iter, | |
176 | rt2x00dev); | |
5c58ee51 ID |
177 | } |
178 | ||
95ea3627 ID |
179 | /* |
180 | * Interrupt context handlers. | |
181 | */ | |
07896fe2 HS |
182 | static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac, |
183 | struct ieee80211_vif *vif) | |
184 | { | |
185 | struct rt2x00_dev *rt2x00dev = data; | |
186 | struct sk_buff *skb; | |
187 | ||
188 | /* | |
189 | * Only AP mode interfaces do broad- and multicast buffering | |
190 | */ | |
191 | if (vif->type != NL80211_IFTYPE_AP) | |
192 | return; | |
193 | ||
194 | /* | |
195 | * Send out buffered broad- and multicast frames | |
196 | */ | |
197 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
198 | while (skb) { | |
199 | rt2x00mac_tx(rt2x00dev->hw, skb); | |
200 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
201 | } | |
202 | } | |
203 | ||
9f926fb5 HS |
204 | static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac, |
205 | struct ieee80211_vif *vif) | |
95ea3627 | 206 | { |
4dee32f5 | 207 | struct rt2x00_dev *rt2x00dev = data; |
95ea3627 | 208 | |
05c914fe | 209 | if (vif->type != NL80211_IFTYPE_AP && |
a07dbea2 | 210 | vif->type != NL80211_IFTYPE_ADHOC && |
ce292a64 ID |
211 | vif->type != NL80211_IFTYPE_MESH_POINT && |
212 | vif->type != NL80211_IFTYPE_WDS) | |
95ea3627 ID |
213 | return; |
214 | ||
4dee32f5 | 215 | rt2x00queue_update_beacon(rt2x00dev, vif, true); |
95ea3627 ID |
216 | } |
217 | ||
218 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
219 | { | |
0262ab0d | 220 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
221 | return; |
222 | ||
07896fe2 | 223 | /* send buffered bc/mc frames out for every bssid */ |
4dee32f5 | 224 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
07896fe2 HS |
225 | rt2x00lib_bc_buffer_iter, |
226 | rt2x00dev); | |
9f926fb5 HS |
227 | /* |
228 | * Devices with pre tbtt interrupt don't need to update the beacon | |
229 | * here as they will fetch the next beacon directly prior to | |
230 | * transmission. | |
231 | */ | |
232 | if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT, &rt2x00dev->flags)) | |
233 | return; | |
07896fe2 HS |
234 | |
235 | /* fetch next beacon */ | |
236 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
9f926fb5 | 237 | rt2x00lib_beaconupdate_iter, |
07896fe2 | 238 | rt2x00dev); |
95ea3627 ID |
239 | } |
240 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
241 | ||
9f926fb5 HS |
242 | void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev) |
243 | { | |
244 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
245 | return; | |
246 | ||
247 | /* fetch next beacon */ | |
248 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, | |
249 | rt2x00lib_beaconupdate_iter, | |
250 | rt2x00dev); | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt); | |
253 | ||
652a9dd2 ID |
254 | void rt2x00lib_dmadone(struct queue_entry *entry) |
255 | { | |
a13c8f31 | 256 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
652a9dd2 ID |
257 | rt2x00queue_index_inc(entry->queue, Q_INDEX_DMA_DONE); |
258 | } | |
259 | EXPORT_SYMBOL_GPL(rt2x00lib_dmadone); | |
260 | ||
181d6902 ID |
261 | void rt2x00lib_txdone(struct queue_entry *entry, |
262 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 263 | { |
181d6902 | 264 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
e039fa4a | 265 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
e6a9854b | 266 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
d74f5ba4 | 267 | enum data_queue_qid qid = skb_get_queue_mapping(entry->skb); |
9f166171 | 268 | unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
92ed48e5 | 269 | u8 rate_idx, rate_flags, retry_rates; |
7351c6bd | 270 | u8 skbdesc_flags = skbdesc->flags; |
92ed48e5 | 271 | unsigned int i; |
2e27cff8 | 272 | bool success; |
d74f5ba4 | 273 | |
e513a0b6 GW |
274 | /* |
275 | * Unmap the skb. | |
276 | */ | |
fa69560f | 277 | rt2x00queue_unmap_skb(entry); |
e513a0b6 GW |
278 | |
279 | /* | |
280 | * Remove the extra tx headroom from the skb. | |
281 | */ | |
282 | skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom); | |
283 | ||
284 | /* | |
285 | * Signal that the TX descriptor is no longer in the skb. | |
286 | */ | |
287 | skbdesc->flags &= ~SKBDESC_DESC_IN_SKB; | |
288 | ||
9f166171 ID |
289 | /* |
290 | * Remove L2 padding which was added during | |
291 | */ | |
292 | if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags)) | |
daee6c09 | 293 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
9f166171 | 294 | |
2bb057d0 ID |
295 | /* |
296 | * If the IV/EIV data was stripped from the frame before it was | |
297 | * passed to the hardware, we should now reinsert it again because | |
77c2061d | 298 | * mac80211 will expect the same data to be present it the |
2bb057d0 ID |
299 | * frame as it was passed to us. |
300 | */ | |
301 | if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) | |
9f166171 | 302 | rt2x00crypto_tx_insert_iv(entry->skb, header_length); |
2bb057d0 | 303 | |
e039fa4a JB |
304 | /* |
305 | * Send frame to debugfs immediately, after this call is completed | |
306 | * we are going to overwrite the skb->cb array. | |
307 | */ | |
308 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb); | |
95ea3627 ID |
309 | |
310 | /* | |
2e27cff8 | 311 | * Determine if the frame has been successfully transmitted. |
95ea3627 | 312 | */ |
2e27cff8 | 313 | success = |
ce4c45e0 | 314 | test_bit(TXDONE_SUCCESS, &txdesc->flags) || |
fd6dcb88 | 315 | test_bit(TXDONE_UNKNOWN, &txdesc->flags); |
2e27cff8 ID |
316 | |
317 | /* | |
318 | * Update TX statistics. | |
319 | */ | |
320 | rt2x00dev->link.qual.tx_success += success; | |
321 | rt2x00dev->link.qual.tx_failed += !success; | |
95ea3627 | 322 | |
e6a9854b JB |
323 | rate_idx = skbdesc->tx_rate_idx; |
324 | rate_flags = skbdesc->tx_rate_flags; | |
92ed48e5 BP |
325 | retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ? |
326 | (txdesc->retry + 1) : 1; | |
e6a9854b | 327 | |
181d6902 ID |
328 | /* |
329 | * Initialize TX status | |
330 | */ | |
e039fa4a JB |
331 | memset(&tx_info->status, 0, sizeof(tx_info->status)); |
332 | tx_info->status.ack_signal = 0; | |
92ed48e5 BP |
333 | |
334 | /* | |
335 | * Frame was send with retries, hardware tried | |
336 | * different rates to send out the frame, at each | |
3d2bc103 HS |
337 | * retry it lowered the rate 1 step except when the |
338 | * lowest rate was used. | |
92ed48e5 BP |
339 | */ |
340 | for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) { | |
341 | tx_info->status.rates[i].idx = rate_idx - i; | |
342 | tx_info->status.rates[i].flags = rate_flags; | |
3d2bc103 HS |
343 | |
344 | if (rate_idx - i == 0) { | |
345 | /* | |
346 | * The lowest rate (index 0) was used until the | |
347 | * number of max retries was reached. | |
348 | */ | |
349 | tx_info->status.rates[i].count = retry_rates - i; | |
350 | i++; | |
351 | break; | |
352 | } | |
92ed48e5 BP |
353 | tx_info->status.rates[i].count = 1; |
354 | } | |
2e27cff8 | 355 | if (i < (IEEE80211_TX_MAX_RATES - 1)) |
92ed48e5 | 356 | tx_info->status.rates[i].idx = -1; /* terminate */ |
181d6902 | 357 | |
e039fa4a | 358 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) { |
2e27cff8 | 359 | if (success) |
e039fa4a | 360 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
2e27cff8 | 361 | else |
181d6902 | 362 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
363 | } |
364 | ||
1df90809 HS |
365 | /* |
366 | * Every single frame has it's own tx status, hence report | |
367 | * every frame as ampdu of size 1. | |
368 | * | |
369 | * TODO: if we can find out how many frames were aggregated | |
370 | * by the hw we could provide the real ampdu_len to mac80211 | |
371 | * which would allow the rc algorithm to better decide on | |
372 | * which rates are suitable. | |
373 | */ | |
374 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { | |
375 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; | |
376 | tx_info->status.ampdu_len = 1; | |
377 | tx_info->status.ampdu_ack_len = success ? 1 : 0; | |
378 | } | |
379 | ||
e6a9854b | 380 | if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
2e27cff8 | 381 | if (success) |
181d6902 | 382 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
2e27cff8 | 383 | else |
181d6902 | 384 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
385 | } |
386 | ||
387 | /* | |
7351c6bd JB |
388 | * Only send the status report to mac80211 when it's a frame |
389 | * that originated in mac80211. If this was a extra frame coming | |
390 | * through a mac80211 library call (RTS/CTS) then we should not | |
391 | * send the status report back. | |
95ea3627 | 392 | */ |
7351c6bd | 393 | if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) |
7e613e16 | 394 | ieee80211_tx_status(rt2x00dev->hw, entry->skb); |
baf26a7e | 395 | else |
78e256c9 | 396 | dev_kfree_skb_any(entry->skb); |
d74f5ba4 ID |
397 | |
398 | /* | |
399 | * Make this entry available for reuse. | |
400 | */ | |
95ea3627 | 401 | entry->skb = NULL; |
d74f5ba4 ID |
402 | entry->flags = 0; |
403 | ||
798b7adb | 404 | rt2x00dev->ops->lib->clear_entry(entry); |
d74f5ba4 | 405 | |
d74f5ba4 ID |
406 | rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE); |
407 | ||
408 | /* | |
409 | * If the data queue was below the threshold before the txdone | |
410 | * handler we must make sure the packet queue in the mac80211 stack | |
411 | * is reenabled when the txdone handler has finished. | |
412 | */ | |
413 | if (!rt2x00queue_threshold(entry->queue)) | |
414 | ieee80211_wake_queue(rt2x00dev->hw, qid); | |
95ea3627 ID |
415 | } |
416 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
3392bece ID |
417 | |
418 | void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status) | |
419 | { | |
420 | struct txdone_entry_desc txdesc; | |
421 | ||
422 | txdesc.flags = 0; | |
423 | __set_bit(status, &txdesc.flags); | |
424 | txdesc.retry = 0; | |
425 | ||
426 | rt2x00lib_txdone(entry, &txdesc); | |
427 | } | |
428 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo); | |
95ea3627 | 429 | |
35f00cfc ID |
430 | static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev, |
431 | struct rxdone_entry_desc *rxdesc) | |
432 | { | |
433 | struct ieee80211_supported_band *sband; | |
434 | const struct rt2x00_rate *rate; | |
435 | unsigned int i; | |
3590eea4 ID |
436 | int signal = rxdesc->signal; |
437 | int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK); | |
438 | ||
439 | switch (rxdesc->rate_mode) { | |
440 | case RATE_MODE_CCK: | |
441 | case RATE_MODE_OFDM: | |
442 | /* | |
443 | * For non-HT rates the MCS value needs to contain the | |
444 | * actually used rate modulation (CCK or OFDM). | |
445 | */ | |
446 | if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS) | |
447 | signal = RATE_MCS(rxdesc->rate_mode, signal); | |
448 | ||
449 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; | |
450 | for (i = 0; i < sband->n_bitrates; i++) { | |
451 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); | |
452 | if (((type == RXDONE_SIGNAL_PLCP) && | |
453 | (rate->plcp == signal)) || | |
454 | ((type == RXDONE_SIGNAL_BITRATE) && | |
455 | (rate->bitrate == signal)) || | |
456 | ((type == RXDONE_SIGNAL_MCS) && | |
457 | (rate->mcs == signal))) { | |
458 | return i; | |
459 | } | |
35f00cfc | 460 | } |
3590eea4 ID |
461 | break; |
462 | case RATE_MODE_HT_MIX: | |
463 | case RATE_MODE_HT_GREENFIELD: | |
464 | if (signal >= 0 && signal <= 76) | |
465 | return signal; | |
466 | break; | |
467 | default: | |
468 | break; | |
35f00cfc ID |
469 | } |
470 | ||
471 | WARNING(rt2x00dev, "Frame received with unrecognized signal, " | |
3590eea4 ID |
472 | "mode=0x%.4x, signal=0x%.4x, type=%d.\n", |
473 | rxdesc->rate_mode, signal, type); | |
35f00cfc ID |
474 | return 0; |
475 | } | |
476 | ||
fa69560f | 477 | void rt2x00lib_rxdone(struct queue_entry *entry) |
95ea3627 | 478 | { |
fa69560f | 479 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c4da0048 GW |
480 | struct rxdone_entry_desc rxdesc; |
481 | struct sk_buff *skb; | |
e5ef5bad | 482 | struct ieee80211_rx_status *rx_status; |
2bb057d0 | 483 | unsigned int header_length; |
35f00cfc | 484 | int rate_idx; |
7e613e16 | 485 | |
070192dd ID |
486 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
487 | !test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
488 | goto submit_entry; | |
489 | ||
7e613e16 ID |
490 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
491 | goto submit_entry; | |
492 | ||
c4da0048 GW |
493 | /* |
494 | * Allocate a new sk_buffer. If no new buffer available, drop the | |
495 | * received frame and reuse the existing buffer. | |
496 | */ | |
fa69560f | 497 | skb = rt2x00queue_alloc_rxskb(entry); |
c4da0048 | 498 | if (!skb) |
1550c8ef | 499 | goto submit_entry; |
c4da0048 GW |
500 | |
501 | /* | |
502 | * Unmap the skb. | |
503 | */ | |
fa69560f | 504 | rt2x00queue_unmap_skb(entry); |
c4da0048 GW |
505 | |
506 | /* | |
507 | * Extract the RXD details. | |
508 | */ | |
509 | memset(&rxdesc, 0, sizeof(rxdesc)); | |
510 | rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); | |
95ea3627 | 511 | |
239c249d GW |
512 | /* |
513 | * The data behind the ieee80211 header must be | |
a9f853dd | 514 | * aligned on a 4 byte boundary. |
239c249d | 515 | */ |
2bb057d0 | 516 | header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
239c249d | 517 | |
2bb057d0 ID |
518 | /* |
519 | * Hardware might have stripped the IV/EIV/ICV data, | |
520 | * in that case it is possible that the data was | |
3ad2f3fb | 521 | * provided separately (through hardware descriptor) |
2bb057d0 ID |
522 | * in which case we should reinsert the data into the frame. |
523 | */ | |
74415edb | 524 | if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) && |
9f166171 | 525 | (rxdesc.flags & RX_FLAG_IV_STRIPPED)) |
daee6c09 | 526 | rt2x00crypto_rx_insert_iv(entry->skb, header_length, |
9f166171 | 527 | &rxdesc); |
b7340833 GW |
528 | else if (header_length && |
529 | (rxdesc.size > header_length) && | |
530 | (rxdesc.dev_flags & RXDONE_L2PAD)) | |
daee6c09 | 531 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
9f166171 | 532 | else |
daee6c09 | 533 | rt2x00queue_align_payload(entry->skb, header_length); |
239c249d | 534 | |
1398d458 AB |
535 | /* Trim buffer to correct size */ |
536 | skb_trim(entry->skb, rxdesc.size); | |
537 | ||
95ea3627 | 538 | /* |
3590eea4 | 539 | * Translate the signal to the correct bitrate index. |
95ea3627 | 540 | */ |
3590eea4 ID |
541 | rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc); |
542 | if (rxdesc.rate_mode == RATE_MODE_HT_MIX || | |
543 | rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD) | |
35f00cfc | 544 | rxdesc.flags |= RX_FLAG_HT; |
866a0503 | 545 | |
61af43c5 | 546 | /* |
84e3196f | 547 | * Update extra components |
61af43c5 | 548 | */ |
84e3196f ID |
549 | rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc); |
550 | rt2x00debug_update_crypto(rt2x00dev, &rxdesc); | |
e5ef5bad | 551 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); |
69f81a2c | 552 | |
e5ef5bad ID |
553 | /* |
554 | * Initialize RX status information, and send frame | |
555 | * to mac80211. | |
556 | */ | |
557 | rx_status = IEEE80211_SKB_RXCB(entry->skb); | |
ae73e58e | 558 | rx_status->mactime = rxdesc.timestamp; |
e5ef5bad ID |
559 | rx_status->band = rt2x00dev->curr_band; |
560 | rx_status->freq = rt2x00dev->curr_freq; | |
35f00cfc | 561 | rx_status->rate_idx = rate_idx; |
c4da0048 GW |
562 | rx_status->signal = rxdesc.rssi; |
563 | rx_status->flag = rxdesc.flags; | |
69f81a2c | 564 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 | 565 | |
7e613e16 | 566 | ieee80211_rx_ni(rt2x00dev->hw, entry->skb); |
c4da0048 GW |
567 | |
568 | /* | |
569 | * Replace the skb with the freshly allocated one. | |
570 | */ | |
571 | entry->skb = skb; | |
d74f5ba4 | 572 | |
7e613e16 | 573 | submit_entry: |
070192dd | 574 | entry->flags = 0; |
7e613e16 | 575 | rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE); |
070192dd ID |
576 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && |
577 | test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) { | |
578 | rt2x00dev->ops->lib->clear_entry(entry); | |
579 | rt2x00queue_index_inc(entry->queue, Q_INDEX); | |
580 | } | |
95ea3627 ID |
581 | } |
582 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
583 | ||
95ea3627 ID |
584 | /* |
585 | * Driver initialization handlers. | |
586 | */ | |
70e2fed4 ID |
587 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
588 | { | |
3d8606a6 | 589 | .flags = DEV_RATE_CCK, |
70e2fed4 | 590 | .bitrate = 10, |
aa776721 | 591 | .ratemask = BIT(0), |
70e2fed4 | 592 | .plcp = 0x00, |
35f00cfc | 593 | .mcs = RATE_MCS(RATE_MODE_CCK, 0), |
70e2fed4 ID |
594 | }, |
595 | { | |
3d8606a6 | 596 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 597 | .bitrate = 20, |
aa776721 | 598 | .ratemask = BIT(1), |
70e2fed4 | 599 | .plcp = 0x01, |
35f00cfc | 600 | .mcs = RATE_MCS(RATE_MODE_CCK, 1), |
70e2fed4 ID |
601 | }, |
602 | { | |
3d8606a6 | 603 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 604 | .bitrate = 55, |
aa776721 | 605 | .ratemask = BIT(2), |
70e2fed4 | 606 | .plcp = 0x02, |
35f00cfc | 607 | .mcs = RATE_MCS(RATE_MODE_CCK, 2), |
70e2fed4 ID |
608 | }, |
609 | { | |
3d8606a6 | 610 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 611 | .bitrate = 110, |
aa776721 | 612 | .ratemask = BIT(3), |
70e2fed4 | 613 | .plcp = 0x03, |
35f00cfc | 614 | .mcs = RATE_MCS(RATE_MODE_CCK, 3), |
70e2fed4 ID |
615 | }, |
616 | { | |
3d8606a6 | 617 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 618 | .bitrate = 60, |
aa776721 | 619 | .ratemask = BIT(4), |
70e2fed4 | 620 | .plcp = 0x0b, |
35f00cfc | 621 | .mcs = RATE_MCS(RATE_MODE_OFDM, 0), |
70e2fed4 ID |
622 | }, |
623 | { | |
624 | .flags = DEV_RATE_OFDM, | |
625 | .bitrate = 90, | |
aa776721 | 626 | .ratemask = BIT(5), |
70e2fed4 | 627 | .plcp = 0x0f, |
35f00cfc | 628 | .mcs = RATE_MCS(RATE_MODE_OFDM, 1), |
70e2fed4 ID |
629 | }, |
630 | { | |
3d8606a6 | 631 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 632 | .bitrate = 120, |
aa776721 | 633 | .ratemask = BIT(6), |
70e2fed4 | 634 | .plcp = 0x0a, |
35f00cfc | 635 | .mcs = RATE_MCS(RATE_MODE_OFDM, 2), |
70e2fed4 ID |
636 | }, |
637 | { | |
638 | .flags = DEV_RATE_OFDM, | |
639 | .bitrate = 180, | |
aa776721 | 640 | .ratemask = BIT(7), |
70e2fed4 | 641 | .plcp = 0x0e, |
35f00cfc | 642 | .mcs = RATE_MCS(RATE_MODE_OFDM, 3), |
70e2fed4 ID |
643 | }, |
644 | { | |
3d8606a6 | 645 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 646 | .bitrate = 240, |
aa776721 | 647 | .ratemask = BIT(8), |
70e2fed4 | 648 | .plcp = 0x09, |
35f00cfc | 649 | .mcs = RATE_MCS(RATE_MODE_OFDM, 4), |
70e2fed4 ID |
650 | }, |
651 | { | |
652 | .flags = DEV_RATE_OFDM, | |
653 | .bitrate = 360, | |
aa776721 | 654 | .ratemask = BIT(9), |
70e2fed4 | 655 | .plcp = 0x0d, |
35f00cfc | 656 | .mcs = RATE_MCS(RATE_MODE_OFDM, 5), |
70e2fed4 ID |
657 | }, |
658 | { | |
659 | .flags = DEV_RATE_OFDM, | |
660 | .bitrate = 480, | |
aa776721 | 661 | .ratemask = BIT(10), |
70e2fed4 | 662 | .plcp = 0x08, |
35f00cfc | 663 | .mcs = RATE_MCS(RATE_MODE_OFDM, 6), |
70e2fed4 ID |
664 | }, |
665 | { | |
666 | .flags = DEV_RATE_OFDM, | |
667 | .bitrate = 540, | |
aa776721 | 668 | .ratemask = BIT(11), |
70e2fed4 | 669 | .plcp = 0x0c, |
35f00cfc | 670 | .mcs = RATE_MCS(RATE_MODE_OFDM, 7), |
70e2fed4 ID |
671 | }, |
672 | }; | |
673 | ||
95ea3627 ID |
674 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
675 | const int channel, const int tx_power, | |
676 | const int value) | |
677 | { | |
f2a3c7f5 | 678 | entry->center_freq = ieee80211_channel_to_frequency(channel); |
8318d78a JB |
679 | entry->hw_value = value; |
680 | entry->max_power = tx_power; | |
681 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
682 | } |
683 | ||
684 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 685 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 686 | { |
70e2fed4 ID |
687 | entry->flags = 0; |
688 | entry->bitrate = rate->bitrate; | |
3ea96463 ID |
689 | entry->hw_value =index; |
690 | entry->hw_value_short = index; | |
70e2fed4 | 691 | |
3ea96463 | 692 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) |
70e2fed4 | 693 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; |
95ea3627 ID |
694 | } |
695 | ||
696 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
697 | struct hw_mode_spec *spec) | |
698 | { | |
699 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
95ea3627 ID |
700 | struct ieee80211_channel *channels; |
701 | struct ieee80211_rate *rates; | |
31562e80 | 702 | unsigned int num_rates; |
95ea3627 | 703 | unsigned int i; |
95ea3627 | 704 | |
31562e80 ID |
705 | num_rates = 0; |
706 | if (spec->supported_rates & SUPPORT_RATE_CCK) | |
707 | num_rates += 4; | |
708 | if (spec->supported_rates & SUPPORT_RATE_OFDM) | |
709 | num_rates += 8; | |
95ea3627 ID |
710 | |
711 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
712 | if (!channels) | |
8318d78a | 713 | return -ENOMEM; |
95ea3627 | 714 | |
31562e80 | 715 | rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL); |
95ea3627 ID |
716 | if (!rates) |
717 | goto exit_free_channels; | |
718 | ||
719 | /* | |
720 | * Initialize Rate list. | |
721 | */ | |
31562e80 | 722 | for (i = 0; i < num_rates; i++) |
8f5fa7f0 | 723 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
724 | |
725 | /* | |
726 | * Initialize Channel list. | |
727 | */ | |
728 | for (i = 0; i < spec->num_channels; i++) { | |
95ea3627 | 729 | rt2x00lib_channel(&channels[i], |
8c5e7a5f | 730 | spec->channels[i].channel, |
8d1331b3 | 731 | spec->channels_info[i].max_power, i); |
95ea3627 ID |
732 | } |
733 | ||
734 | /* | |
31562e80 | 735 | * Intitialize 802.11b, 802.11g |
95ea3627 | 736 | * Rates: CCK, OFDM. |
8318d78a | 737 | * Channels: 2.4 GHz |
95ea3627 | 738 | */ |
47ac2683 | 739 | if (spec->supported_bands & SUPPORT_BAND_2GHZ) { |
31562e80 ID |
740 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14; |
741 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates; | |
742 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels; | |
743 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
744 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
745 | &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
35f00cfc ID |
746 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap, |
747 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
748 | } |
749 | ||
750 | /* | |
751 | * Intitialize 802.11a | |
752 | * Rates: OFDM. | |
753 | * Channels: OFDM, UNII, HiperLAN2. | |
754 | */ | |
47ac2683 | 755 | if (spec->supported_bands & SUPPORT_BAND_5GHZ) { |
31562e80 ID |
756 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels = |
757 | spec->num_channels - 14; | |
758 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates = | |
759 | num_rates - 4; | |
760 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
761 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
762 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
763 | &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
35f00cfc ID |
764 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap, |
765 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
766 | } |
767 | ||
95ea3627 ID |
768 | return 0; |
769 | ||
8318d78a | 770 | exit_free_channels: |
95ea3627 | 771 | kfree(channels); |
95ea3627 ID |
772 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
773 | return -ENOMEM; | |
774 | } | |
775 | ||
776 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
777 | { | |
0262ab0d | 778 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
779 | ieee80211_unregister_hw(rt2x00dev->hw); |
780 | ||
8318d78a JB |
781 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
782 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
783 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
784 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
785 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 | 786 | } |
8c5e7a5f ID |
787 | |
788 | kfree(rt2x00dev->spec.channels_info); | |
95ea3627 ID |
789 | } |
790 | ||
791 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
792 | { | |
793 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
794 | int status; | |
795 | ||
0262ab0d ID |
796 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
797 | return 0; | |
798 | ||
95ea3627 ID |
799 | /* |
800 | * Initialize HW modes. | |
801 | */ | |
802 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
803 | if (status) | |
804 | return status; | |
805 | ||
61448f88 GW |
806 | /* |
807 | * Initialize HW fields. | |
808 | */ | |
809 | rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues; | |
810 | ||
e6218cc4 GW |
811 | /* |
812 | * Initialize extra TX headroom required. | |
813 | */ | |
7a4a77b7 GW |
814 | rt2x00dev->hw->extra_tx_headroom = |
815 | max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM, | |
816 | rt2x00dev->ops->extra_tx_headroom); | |
817 | ||
818 | /* | |
819 | * Take TX headroom required for alignment into account. | |
820 | */ | |
821 | if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags)) | |
822 | rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE; | |
823 | else if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) | |
824 | rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE; | |
e6218cc4 | 825 | |
96c3da7d HS |
826 | /* |
827 | * Allocate tx status FIFO for driver use. | |
828 | */ | |
829 | if (test_bit(DRIVER_REQUIRE_TXSTATUS_FIFO, &rt2x00dev->flags) && | |
830 | rt2x00dev->ops->lib->txstatus_tasklet) { | |
831 | /* | |
832 | * Allocate txstatus fifo and tasklet, we use a size of 512 | |
833 | * for the kfifo which is big enough to store 512/4=128 tx | |
834 | * status reports. In the worst case (tx status for all tx | |
835 | * queues gets reported before we've got a chance to handle | |
836 | * them) 24*4=384 tx status reports need to be cached. | |
837 | */ | |
838 | status = kfifo_alloc(&rt2x00dev->txstatus_fifo, 512, | |
839 | GFP_KERNEL); | |
840 | if (status) | |
841 | return status; | |
842 | ||
843 | /* tasklet for processing the tx status reports. */ | |
844 | tasklet_init(&rt2x00dev->txstatus_tasklet, | |
845 | rt2x00dev->ops->lib->txstatus_tasklet, | |
846 | (unsigned long)rt2x00dev); | |
847 | ||
848 | } | |
849 | ||
95ea3627 ID |
850 | /* |
851 | * Register HW. | |
852 | */ | |
853 | status = ieee80211_register_hw(rt2x00dev->hw); | |
f05faa31 | 854 | if (status) |
95ea3627 | 855 | return status; |
95ea3627 | 856 | |
0262ab0d | 857 | set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
858 | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* | |
863 | * Initialization/uninitialization handlers. | |
864 | */ | |
e37ea213 | 865 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 | 866 | { |
0262ab0d | 867 | if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
868 | return; |
869 | ||
870 | /* | |
1682fe6d | 871 | * Unregister extra components. |
95ea3627 ID |
872 | */ |
873 | rt2x00rfkill_unregister(rt2x00dev); | |
874 | ||
875 | /* | |
876 | * Allow the HW to uninitialize. | |
877 | */ | |
878 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
879 | ||
880 | /* | |
181d6902 | 881 | * Free allocated queue entries. |
95ea3627 | 882 | */ |
181d6902 | 883 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
884 | } |
885 | ||
e37ea213 | 886 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
887 | { |
888 | int status; | |
889 | ||
0262ab0d | 890 | if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
891 | return 0; |
892 | ||
893 | /* | |
181d6902 | 894 | * Allocate all queue entries. |
95ea3627 | 895 | */ |
181d6902 ID |
896 | status = rt2x00queue_initialize(rt2x00dev); |
897 | if (status) | |
95ea3627 | 898 | return status; |
95ea3627 ID |
899 | |
900 | /* | |
901 | * Initialize the device. | |
902 | */ | |
903 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
ed499983 ID |
904 | if (status) { |
905 | rt2x00queue_uninitialize(rt2x00dev); | |
906 | return status; | |
907 | } | |
95ea3627 | 908 | |
0262ab0d | 909 | set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags); |
95ea3627 ID |
910 | |
911 | /* | |
1682fe6d | 912 | * Register the extra components. |
95ea3627 | 913 | */ |
1682fe6d | 914 | rt2x00rfkill_register(rt2x00dev); |
95ea3627 ID |
915 | |
916 | return 0; | |
95ea3627 ID |
917 | } |
918 | ||
e37ea213 ID |
919 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
920 | { | |
921 | int retval; | |
922 | ||
0262ab0d | 923 | if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
924 | return 0; |
925 | ||
926 | /* | |
927 | * If this is the first interface which is added, | |
928 | * we should load the firmware now. | |
929 | */ | |
9404ef34 ID |
930 | retval = rt2x00lib_load_firmware(rt2x00dev); |
931 | if (retval) | |
932 | return retval; | |
e37ea213 ID |
933 | |
934 | /* | |
935 | * Initialize the device. | |
936 | */ | |
937 | retval = rt2x00lib_initialize(rt2x00dev); | |
938 | if (retval) | |
939 | return retval; | |
940 | ||
6bb40dd1 ID |
941 | rt2x00dev->intf_ap_count = 0; |
942 | rt2x00dev->intf_sta_count = 0; | |
943 | rt2x00dev->intf_associated = 0; | |
944 | ||
bdfa500b ID |
945 | /* Enable the radio */ |
946 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1f0280cb | 947 | if (retval) |
bdfa500b | 948 | return retval; |
bdfa500b | 949 | |
0262ab0d | 950 | set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags); |
e37ea213 ID |
951 | |
952 | return 0; | |
953 | } | |
954 | ||
955 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
956 | { | |
0262ab0d | 957 | if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
958 | return; |
959 | ||
960 | /* | |
961 | * Perhaps we can add something smarter here, | |
962 | * but for now just disabling the radio should do. | |
963 | */ | |
964 | rt2x00lib_disable_radio(rt2x00dev); | |
965 | ||
6bb40dd1 ID |
966 | rt2x00dev->intf_ap_count = 0; |
967 | rt2x00dev->intf_sta_count = 0; | |
968 | rt2x00dev->intf_associated = 0; | |
e37ea213 ID |
969 | } |
970 | ||
95ea3627 ID |
971 | /* |
972 | * driver allocation handlers. | |
973 | */ | |
95ea3627 ID |
974 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
975 | { | |
976 | int retval = -ENOMEM; | |
977 | ||
8ff48a8b ID |
978 | mutex_init(&rt2x00dev->csr_mutex); |
979 | ||
66f84d65 SC |
980 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
981 | ||
6bb40dd1 ID |
982 | /* |
983 | * Make room for rt2x00_intf inside the per-interface | |
984 | * structure ieee80211_vif. | |
985 | */ | |
986 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
987 | ||
3514a441 ID |
988 | /* |
989 | * Determine which operating modes are supported, all modes | |
990 | * which require beaconing, depend on the availability of | |
991 | * beacon entries. | |
992 | */ | |
993 | rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); | |
994 | if (rt2x00dev->ops->bcn->entry_num > 0) | |
995 | rt2x00dev->hw->wiphy->interface_modes |= | |
996 | BIT(NL80211_IFTYPE_ADHOC) | | |
a07dbea2 | 997 | BIT(NL80211_IFTYPE_AP) | |
ce292a64 ID |
998 | BIT(NL80211_IFTYPE_MESH_POINT) | |
999 | BIT(NL80211_IFTYPE_WDS); | |
f59ac048 | 1000 | |
9acd56d3 SB |
1001 | /* |
1002 | * Initialize configuration work. | |
1003 | */ | |
1004 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); | |
1005 | ||
95ea3627 ID |
1006 | /* |
1007 | * Let the driver probe the device to detect the capabilities. | |
1008 | */ | |
1009 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1010 | if (retval) { | |
1011 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1012 | goto exit; | |
1013 | } | |
1014 | ||
95ea3627 | 1015 | /* |
181d6902 | 1016 | * Allocate queue array. |
95ea3627 | 1017 | */ |
181d6902 | 1018 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1019 | if (retval) |
1020 | goto exit; | |
1021 | ||
1022 | /* | |
1023 | * Initialize ieee80211 structure. | |
1024 | */ | |
1025 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1026 | if (retval) { | |
1027 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1028 | goto exit; | |
1029 | } | |
1030 | ||
a9450b70 | 1031 | /* |
1682fe6d | 1032 | * Register extra components. |
a9450b70 | 1033 | */ |
84e3196f | 1034 | rt2x00link_register(rt2x00dev); |
a9450b70 | 1035 | rt2x00leds_register(rt2x00dev); |
95ea3627 ID |
1036 | rt2x00debug_register(rt2x00dev); |
1037 | ||
1038 | return 0; | |
1039 | ||
1040 | exit: | |
1041 | rt2x00lib_remove_dev(rt2x00dev); | |
1042 | ||
1043 | return retval; | |
1044 | } | |
1045 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1046 | ||
1047 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1048 | { | |
0262ab0d | 1049 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
066cb637 | 1050 | |
95ea3627 ID |
1051 | /* |
1052 | * Disable radio. | |
1053 | */ | |
1054 | rt2x00lib_disable_radio(rt2x00dev); | |
1055 | ||
d8cc8926 PR |
1056 | /* |
1057 | * Stop all work. | |
1058 | */ | |
d8cc8926 | 1059 | cancel_work_sync(&rt2x00dev->intf_work); |
7e613e16 ID |
1060 | cancel_work_sync(&rt2x00dev->rxdone_work); |
1061 | cancel_work_sync(&rt2x00dev->txdone_work); | |
d8cc8926 | 1062 | |
96c3da7d HS |
1063 | /* |
1064 | * Free the tx status fifo. | |
1065 | */ | |
1066 | kfifo_free(&rt2x00dev->txstatus_fifo); | |
1067 | ||
1068 | /* | |
1069 | * Kill the tx status tasklet. | |
1070 | */ | |
1071 | tasklet_kill(&rt2x00dev->txstatus_tasklet); | |
1072 | ||
95ea3627 ID |
1073 | /* |
1074 | * Uninitialize device. | |
1075 | */ | |
1076 | rt2x00lib_uninitialize(rt2x00dev); | |
1077 | ||
1078 | /* | |
1682fe6d | 1079 | * Free extra components |
95ea3627 ID |
1080 | */ |
1081 | rt2x00debug_deregister(rt2x00dev); | |
a9450b70 ID |
1082 | rt2x00leds_unregister(rt2x00dev); |
1083 | ||
95ea3627 ID |
1084 | /* |
1085 | * Free ieee80211_hw memory. | |
1086 | */ | |
1087 | rt2x00lib_remove_hw(rt2x00dev); | |
1088 | ||
1089 | /* | |
1090 | * Free firmware image. | |
1091 | */ | |
1092 | rt2x00lib_free_firmware(rt2x00dev); | |
1093 | ||
1094 | /* | |
181d6902 | 1095 | * Free queue structures. |
95ea3627 | 1096 | */ |
181d6902 | 1097 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1098 | } |
1099 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1100 | ||
1101 | /* | |
1102 | * Device state handlers | |
1103 | */ | |
1104 | #ifdef CONFIG_PM | |
1105 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1106 | { | |
95ea3627 | 1107 | NOTICE(rt2x00dev, "Going to sleep.\n"); |
066cb637 ID |
1108 | |
1109 | /* | |
07126127 | 1110 | * Prevent mac80211 from accessing driver while suspended. |
066cb637 | 1111 | */ |
07126127 ID |
1112 | if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
1113 | return 0; | |
95ea3627 ID |
1114 | |
1115 | /* | |
07126127 | 1116 | * Cleanup as much as possible. |
95ea3627 | 1117 | */ |
95ea3627 | 1118 | rt2x00lib_uninitialize(rt2x00dev); |
1682fe6d ID |
1119 | |
1120 | /* | |
1121 | * Suspend/disable extra components. | |
1122 | */ | |
a9450b70 | 1123 | rt2x00leds_suspend(rt2x00dev); |
95ea3627 ID |
1124 | rt2x00debug_deregister(rt2x00dev); |
1125 | ||
1126 | /* | |
9896322a ID |
1127 | * Set device mode to sleep for power management, |
1128 | * on some hardware this call seems to consistently fail. | |
1129 | * From the specifications it is hard to tell why it fails, | |
1130 | * and if this is a "bad thing". | |
1131 | * Overall it is safe to just ignore the failure and | |
1132 | * continue suspending. The only downside is that the | |
1133 | * device will not be in optimal power save mode, but with | |
1134 | * the radio and the other components already disabled the | |
1135 | * device is as good as disabled. | |
95ea3627 | 1136 | */ |
07126127 | 1137 | if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP)) |
9896322a ID |
1138 | WARNING(rt2x00dev, "Device failed to enter sleep state, " |
1139 | "continue suspending.\n"); | |
95ea3627 ID |
1140 | |
1141 | return 0; | |
1142 | } | |
1143 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1144 | ||
1145 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) | |
1146 | { | |
95ea3627 | 1147 | NOTICE(rt2x00dev, "Waking up.\n"); |
95ea3627 ID |
1148 | |
1149 | /* | |
1682fe6d | 1150 | * Restore/enable extra components. |
95ea3627 ID |
1151 | */ |
1152 | rt2x00debug_register(rt2x00dev); | |
a9450b70 | 1153 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1154 | |
e37ea213 ID |
1155 | /* |
1156 | * We are ready again to receive requests from mac80211. | |
1157 | */ | |
0262ab0d | 1158 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
e37ea213 | 1159 | |
95ea3627 | 1160 | return 0; |
95ea3627 ID |
1161 | } |
1162 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1163 | #endif /* CONFIG_PM */ | |
1164 | ||
1165 | /* | |
1166 | * rt2x00lib module information. | |
1167 | */ | |
1168 | MODULE_AUTHOR(DRV_PROJECT); | |
1169 | MODULE_VERSION(DRV_VERSION); | |
1170 | MODULE_DESCRIPTION("rt2x00 library"); | |
1171 | MODULE_LICENSE("GPL"); |