Commit | Line | Data |
---|---|---|
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> |
f78987cf | 30 | #include <linux/log2.h> |
95ea3627 ID |
31 | |
32 | #include "rt2x00.h" | |
33 | #include "rt2x00lib.h" | |
34 | ||
18325523 HS |
35 | /* |
36 | * Utility functions. | |
37 | */ | |
38 | u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev, | |
39 | struct ieee80211_vif *vif) | |
40 | { | |
41 | /* | |
42 | * When in STA mode, bssidx is always 0 otherwise local_address[5] | |
43 | * contains the bss number, see BSS_ID_MASK comments for details. | |
44 | */ | |
45 | if (rt2x00dev->intf_sta_count) | |
46 | return 0; | |
47 | return vif->addr[5] & (rt2x00dev->ops->max_ap_intf - 1); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(rt2x00lib_get_bssidx); | |
50 | ||
95ea3627 ID |
51 | /* |
52 | * Radio control handlers. | |
53 | */ | |
54 | int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) | |
55 | { | |
56 | int status; | |
57 | ||
58 | /* | |
59 | * Don't enable the radio twice. | |
60 | * And check if the hardware button has been disabled. | |
61 | */ | |
4b9631a4 | 62 | if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
63 | return 0; |
64 | ||
837e7f24 | 65 | /* |
181d6902 | 66 | * Initialize all data queues. |
837e7f24 | 67 | */ |
798b7adb | 68 | rt2x00queue_init_queues(rt2x00dev); |
837e7f24 | 69 | |
95ea3627 ID |
70 | /* |
71 | * Enable radio. | |
72 | */ | |
a2e1d52a ID |
73 | status = |
74 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON); | |
95ea3627 ID |
75 | if (status) |
76 | return status; | |
77 | ||
2b08da3f ID |
78 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON); |
79 | ||
a2e1d52a | 80 | rt2x00leds_led_radio(rt2x00dev, true); |
61c2b682 | 81 | rt2x00led_led_activity(rt2x00dev, true); |
a2e1d52a | 82 | |
0262ab0d | 83 | set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags); |
95ea3627 ID |
84 | |
85 | /* | |
0b7fde54 | 86 | * Enable queues. |
95ea3627 | 87 | */ |
0b7fde54 | 88 | rt2x00queue_start_queues(rt2x00dev); |
ea175ee2 | 89 | rt2x00link_start_tuner(rt2x00dev); |
9e33a355 | 90 | rt2x00link_start_agc(rt2x00dev); |
2e9c43dd JL |
91 | if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags)) |
92 | rt2x00link_start_vcocal(rt2x00dev); | |
95ea3627 | 93 | |
c965c74b ID |
94 | /* |
95 | * Start watchdog monitoring. | |
96 | */ | |
97 | rt2x00link_start_watchdog(rt2x00dev); | |
98 | ||
95ea3627 ID |
99 | return 0; |
100 | } | |
101 | ||
102 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
103 | { | |
0262ab0d | 104 | if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
105 | return; |
106 | ||
c965c74b ID |
107 | /* |
108 | * Stop watchdog monitoring. | |
109 | */ | |
110 | rt2x00link_stop_watchdog(rt2x00dev); | |
111 | ||
95ea3627 | 112 | /* |
0b7fde54 | 113 | * Stop all queues |
95ea3627 | 114 | */ |
9e33a355 | 115 | rt2x00link_stop_agc(rt2x00dev); |
2e9c43dd JL |
116 | if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags)) |
117 | rt2x00link_stop_vcocal(rt2x00dev); | |
ea175ee2 | 118 | rt2x00link_stop_tuner(rt2x00dev); |
0b7fde54 | 119 | rt2x00queue_stop_queues(rt2x00dev); |
5be65609 | 120 | rt2x00queue_flush_queues(rt2x00dev, true); |
95ea3627 ID |
121 | |
122 | /* | |
123 | * Disable radio. | |
124 | */ | |
125 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
2b08da3f | 126 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF); |
61c2b682 | 127 | rt2x00led_led_activity(rt2x00dev, false); |
a2e1d52a | 128 | rt2x00leds_led_radio(rt2x00dev, false); |
95ea3627 ID |
129 | } |
130 | ||
6bb40dd1 ID |
131 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
132 | struct ieee80211_vif *vif) | |
5c58ee51 | 133 | { |
6bb40dd1 ID |
134 | struct rt2x00_dev *rt2x00dev = data; |
135 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
6bb40dd1 | 136 | |
980dfcb9 ID |
137 | /* |
138 | * It is possible the radio was disabled while the work had been | |
139 | * scheduled. If that happens we should return here immediately, | |
140 | * note that in the spinlock protected area above the delayed_flags | |
141 | * have been cleared correctly. | |
142 | */ | |
0262ab0d | 143 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
980dfcb9 ID |
144 | return; |
145 | ||
bfe6a15d | 146 | if (test_and_clear_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags)) |
69cf36a4 | 147 | rt2x00queue_update_beacon(rt2x00dev, vif); |
6bb40dd1 | 148 | } |
5c58ee51 | 149 | |
6bb40dd1 ID |
150 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
151 | { | |
152 | struct rt2x00_dev *rt2x00dev = | |
153 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
154 | |
155 | /* | |
6bb40dd1 ID |
156 | * Iterate over each interface and perform the |
157 | * requested configurations. | |
471b3efd | 158 | */ |
6bb40dd1 ID |
159 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
160 | rt2x00lib_intf_scheduled_iter, | |
161 | rt2x00dev); | |
5c58ee51 ID |
162 | } |
163 | ||
1c0bcf89 ID |
164 | static void rt2x00lib_autowakeup(struct work_struct *work) |
165 | { | |
166 | struct rt2x00_dev *rt2x00dev = | |
167 | container_of(work, struct rt2x00_dev, autowakeup_work.work); | |
168 | ||
3bb42a64 SG |
169 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
170 | return; | |
171 | ||
1c0bcf89 ID |
172 | if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE)) |
173 | ERROR(rt2x00dev, "Device failed to wakeup.\n"); | |
174 | clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags); | |
175 | } | |
176 | ||
95ea3627 ID |
177 | /* |
178 | * Interrupt context handlers. | |
179 | */ | |
07896fe2 HS |
180 | static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac, |
181 | struct ieee80211_vif *vif) | |
182 | { | |
183 | struct rt2x00_dev *rt2x00dev = data; | |
184 | struct sk_buff *skb; | |
185 | ||
186 | /* | |
187 | * Only AP mode interfaces do broad- and multicast buffering | |
188 | */ | |
189 | if (vif->type != NL80211_IFTYPE_AP) | |
190 | return; | |
191 | ||
192 | /* | |
193 | * Send out buffered broad- and multicast frames | |
194 | */ | |
195 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
196 | while (skb) { | |
197 | rt2x00mac_tx(rt2x00dev->hw, skb); | |
198 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
199 | } | |
200 | } | |
201 | ||
9f926fb5 HS |
202 | static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac, |
203 | struct ieee80211_vif *vif) | |
95ea3627 | 204 | { |
4dee32f5 | 205 | struct rt2x00_dev *rt2x00dev = data; |
95ea3627 | 206 | |
05c914fe | 207 | if (vif->type != NL80211_IFTYPE_AP && |
a07dbea2 | 208 | vif->type != NL80211_IFTYPE_ADHOC && |
ce292a64 ID |
209 | vif->type != NL80211_IFTYPE_MESH_POINT && |
210 | vif->type != NL80211_IFTYPE_WDS) | |
95ea3627 ID |
211 | return; |
212 | ||
8d59c4e9 HS |
213 | /* |
214 | * Update the beacon without locking. This is safe on PCI devices | |
215 | * as they only update the beacon periodically here. This should | |
216 | * never be called for USB devices. | |
217 | */ | |
218 | WARN_ON(rt2x00_is_usb(rt2x00dev)); | |
219 | rt2x00queue_update_beacon_locked(rt2x00dev, vif); | |
95ea3627 ID |
220 | } |
221 | ||
222 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) | |
223 | { | |
0262ab0d | 224 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
225 | return; |
226 | ||
07896fe2 | 227 | /* send buffered bc/mc frames out for every bssid */ |
8d59c4e9 HS |
228 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
229 | rt2x00lib_bc_buffer_iter, | |
230 | rt2x00dev); | |
9f926fb5 HS |
231 | /* |
232 | * Devices with pre tbtt interrupt don't need to update the beacon | |
233 | * here as they will fetch the next beacon directly prior to | |
234 | * transmission. | |
235 | */ | |
7dab73b3 | 236 | if (test_bit(CAPABILITY_PRE_TBTT_INTERRUPT, &rt2x00dev->cap_flags)) |
9f926fb5 | 237 | return; |
07896fe2 HS |
238 | |
239 | /* fetch next beacon */ | |
8d59c4e9 HS |
240 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
241 | rt2x00lib_beaconupdate_iter, | |
242 | rt2x00dev); | |
95ea3627 ID |
243 | } |
244 | EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); | |
245 | ||
9f926fb5 HS |
246 | void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev) |
247 | { | |
248 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
249 | return; | |
250 | ||
251 | /* fetch next beacon */ | |
8d59c4e9 HS |
252 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
253 | rt2x00lib_beaconupdate_iter, | |
254 | rt2x00dev); | |
9f926fb5 HS |
255 | } |
256 | EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt); | |
257 | ||
64e7d723 ID |
258 | void rt2x00lib_dmastart(struct queue_entry *entry) |
259 | { | |
260 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); | |
75256f03 | 261 | rt2x00queue_index_inc(entry, Q_INDEX); |
64e7d723 ID |
262 | } |
263 | EXPORT_SYMBOL_GPL(rt2x00lib_dmastart); | |
264 | ||
652a9dd2 ID |
265 | void rt2x00lib_dmadone(struct queue_entry *entry) |
266 | { | |
dba5dc1a | 267 | set_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags); |
a13c8f31 | 268 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
75256f03 | 269 | rt2x00queue_index_inc(entry, Q_INDEX_DMA_DONE); |
652a9dd2 ID |
270 | } |
271 | EXPORT_SYMBOL_GPL(rt2x00lib_dmadone); | |
272 | ||
181d6902 ID |
273 | void rt2x00lib_txdone(struct queue_entry *entry, |
274 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 275 | { |
181d6902 | 276 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
e039fa4a | 277 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
e6a9854b | 278 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
f8eaec65 | 279 | unsigned int header_length, i; |
92ed48e5 | 280 | u8 rate_idx, rate_flags, retry_rates; |
7351c6bd | 281 | u8 skbdesc_flags = skbdesc->flags; |
2e27cff8 | 282 | bool success; |
d74f5ba4 | 283 | |
e513a0b6 GW |
284 | /* |
285 | * Unmap the skb. | |
286 | */ | |
fa69560f | 287 | rt2x00queue_unmap_skb(entry); |
e513a0b6 GW |
288 | |
289 | /* | |
290 | * Remove the extra tx headroom from the skb. | |
291 | */ | |
292 | skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom); | |
293 | ||
294 | /* | |
295 | * Signal that the TX descriptor is no longer in the skb. | |
296 | */ | |
297 | skbdesc->flags &= ~SKBDESC_DESC_IN_SKB; | |
298 | ||
f8eaec65 RJH |
299 | /* |
300 | * Determine the length of 802.11 header. | |
301 | */ | |
302 | header_length = ieee80211_get_hdrlen_from_skb(entry->skb); | |
303 | ||
9f166171 ID |
304 | /* |
305 | * Remove L2 padding which was added during | |
306 | */ | |
7dab73b3 | 307 | if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) |
daee6c09 | 308 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
9f166171 | 309 | |
2bb057d0 ID |
310 | /* |
311 | * If the IV/EIV data was stripped from the frame before it was | |
312 | * passed to the hardware, we should now reinsert it again because | |
77c2061d | 313 | * mac80211 will expect the same data to be present it the |
2bb057d0 ID |
314 | * frame as it was passed to us. |
315 | */ | |
7dab73b3 | 316 | if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags)) |
9f166171 | 317 | rt2x00crypto_tx_insert_iv(entry->skb, header_length); |
2bb057d0 | 318 | |
e039fa4a JB |
319 | /* |
320 | * Send frame to debugfs immediately, after this call is completed | |
321 | * we are going to overwrite the skb->cb array. | |
322 | */ | |
323 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb); | |
95ea3627 ID |
324 | |
325 | /* | |
2e27cff8 | 326 | * Determine if the frame has been successfully transmitted. |
95ea3627 | 327 | */ |
2e27cff8 | 328 | success = |
ce4c45e0 | 329 | test_bit(TXDONE_SUCCESS, &txdesc->flags) || |
fd6dcb88 | 330 | test_bit(TXDONE_UNKNOWN, &txdesc->flags); |
2e27cff8 ID |
331 | |
332 | /* | |
333 | * Update TX statistics. | |
334 | */ | |
335 | rt2x00dev->link.qual.tx_success += success; | |
336 | rt2x00dev->link.qual.tx_failed += !success; | |
95ea3627 | 337 | |
e6a9854b JB |
338 | rate_idx = skbdesc->tx_rate_idx; |
339 | rate_flags = skbdesc->tx_rate_flags; | |
92ed48e5 BP |
340 | retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ? |
341 | (txdesc->retry + 1) : 1; | |
e6a9854b | 342 | |
181d6902 ID |
343 | /* |
344 | * Initialize TX status | |
345 | */ | |
e039fa4a JB |
346 | memset(&tx_info->status, 0, sizeof(tx_info->status)); |
347 | tx_info->status.ack_signal = 0; | |
92ed48e5 BP |
348 | |
349 | /* | |
350 | * Frame was send with retries, hardware tried | |
351 | * different rates to send out the frame, at each | |
3d2bc103 HS |
352 | * retry it lowered the rate 1 step except when the |
353 | * lowest rate was used. | |
92ed48e5 BP |
354 | */ |
355 | for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) { | |
356 | tx_info->status.rates[i].idx = rate_idx - i; | |
357 | tx_info->status.rates[i].flags = rate_flags; | |
3d2bc103 HS |
358 | |
359 | if (rate_idx - i == 0) { | |
360 | /* | |
361 | * The lowest rate (index 0) was used until the | |
362 | * number of max retries was reached. | |
363 | */ | |
364 | tx_info->status.rates[i].count = retry_rates - i; | |
365 | i++; | |
366 | break; | |
367 | } | |
92ed48e5 BP |
368 | tx_info->status.rates[i].count = 1; |
369 | } | |
2e27cff8 | 370 | if (i < (IEEE80211_TX_MAX_RATES - 1)) |
92ed48e5 | 371 | tx_info->status.rates[i].idx = -1; /* terminate */ |
181d6902 | 372 | |
e039fa4a | 373 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) { |
2e27cff8 | 374 | if (success) |
e039fa4a | 375 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
2e27cff8 | 376 | else |
181d6902 | 377 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
378 | } |
379 | ||
1df90809 HS |
380 | /* |
381 | * Every single frame has it's own tx status, hence report | |
382 | * every frame as ampdu of size 1. | |
383 | * | |
384 | * TODO: if we can find out how many frames were aggregated | |
385 | * by the hw we could provide the real ampdu_len to mac80211 | |
386 | * which would allow the rc algorithm to better decide on | |
387 | * which rates are suitable. | |
388 | */ | |
f16d2db7 HS |
389 | if (test_bit(TXDONE_AMPDU, &txdesc->flags) || |
390 | tx_info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1df90809 HS |
391 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
392 | tx_info->status.ampdu_len = 1; | |
393 | tx_info->status.ampdu_ack_len = success ? 1 : 0; | |
f16d2db7 HS |
394 | |
395 | if (!success) | |
396 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
1df90809 HS |
397 | } |
398 | ||
e6a9854b | 399 | if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
2e27cff8 | 400 | if (success) |
181d6902 | 401 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
2e27cff8 | 402 | else |
181d6902 | 403 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
404 | } |
405 | ||
406 | /* | |
7351c6bd JB |
407 | * Only send the status report to mac80211 when it's a frame |
408 | * that originated in mac80211. If this was a extra frame coming | |
409 | * through a mac80211 library call (RTS/CTS) then we should not | |
410 | * send the status report back. | |
95ea3627 | 411 | */ |
20ed3166 | 412 | if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) { |
7dab73b3 | 413 | if (test_bit(REQUIRE_TASKLET_CONTEXT, &rt2x00dev->cap_flags)) |
20ed3166 JS |
414 | ieee80211_tx_status(rt2x00dev->hw, entry->skb); |
415 | else | |
416 | ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb); | |
417 | } else | |
78e256c9 | 418 | dev_kfree_skb_any(entry->skb); |
d74f5ba4 ID |
419 | |
420 | /* | |
421 | * Make this entry available for reuse. | |
422 | */ | |
95ea3627 | 423 | entry->skb = NULL; |
d74f5ba4 ID |
424 | entry->flags = 0; |
425 | ||
798b7adb | 426 | rt2x00dev->ops->lib->clear_entry(entry); |
d74f5ba4 | 427 | |
75256f03 | 428 | rt2x00queue_index_inc(entry, Q_INDEX_DONE); |
d74f5ba4 ID |
429 | |
430 | /* | |
431 | * If the data queue was below the threshold before the txdone | |
432 | * handler we must make sure the packet queue in the mac80211 stack | |
3780d038 SG |
433 | * is reenabled when the txdone handler has finished. This has to be |
434 | * serialized with rt2x00mac_tx(), otherwise we can wake up queue | |
435 | * before it was stopped. | |
d74f5ba4 | 436 | */ |
3780d038 | 437 | spin_lock_bh(&entry->queue->tx_lock); |
d74f5ba4 | 438 | if (!rt2x00queue_threshold(entry->queue)) |
0b7fde54 | 439 | rt2x00queue_unpause_queue(entry->queue); |
3780d038 | 440 | spin_unlock_bh(&entry->queue->tx_lock); |
95ea3627 ID |
441 | } |
442 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
3392bece ID |
443 | |
444 | void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status) | |
445 | { | |
446 | struct txdone_entry_desc txdesc; | |
447 | ||
448 | txdesc.flags = 0; | |
449 | __set_bit(status, &txdesc.flags); | |
450 | txdesc.retry = 0; | |
451 | ||
452 | rt2x00lib_txdone(entry, &txdesc); | |
453 | } | |
454 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo); | |
95ea3627 | 455 | |
1c0bcf89 ID |
456 | static u8 *rt2x00lib_find_ie(u8 *data, unsigned int len, u8 ie) |
457 | { | |
458 | struct ieee80211_mgmt *mgmt = (void *)data; | |
459 | u8 *pos, *end; | |
460 | ||
461 | pos = (u8 *)mgmt->u.beacon.variable; | |
462 | end = data + len; | |
463 | while (pos < end) { | |
464 | if (pos + 2 + pos[1] > end) | |
465 | return NULL; | |
466 | ||
467 | if (pos[0] == ie) | |
468 | return pos; | |
469 | ||
470 | pos += 2 + pos[1]; | |
471 | } | |
472 | ||
473 | return NULL; | |
474 | } | |
475 | ||
ed66ba47 GW |
476 | static void rt2x00lib_sleep(struct work_struct *work) |
477 | { | |
478 | struct rt2x00_dev *rt2x00dev = | |
479 | container_of(work, struct rt2x00_dev, sleep_work); | |
480 | ||
481 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) | |
482 | return; | |
483 | ||
484 | /* | |
485 | * Check again is powersaving is enabled, to prevent races from delayed | |
486 | * work execution. | |
487 | */ | |
488 | if (!test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags)) | |
489 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, | |
490 | IEEE80211_CONF_CHANGE_PS); | |
491 | } | |
492 | ||
1c0bcf89 ID |
493 | static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev *rt2x00dev, |
494 | struct sk_buff *skb, | |
495 | struct rxdone_entry_desc *rxdesc) | |
496 | { | |
497 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
498 | struct ieee80211_tim_ie *tim_ie; | |
499 | u8 *tim; | |
500 | u8 tim_len; | |
501 | bool cam; | |
502 | ||
503 | /* If this is not a beacon, or if mac80211 has no powersaving | |
504 | * configured, or if the device is already in powersaving mode | |
505 | * we can exit now. */ | |
506 | if (likely(!ieee80211_is_beacon(hdr->frame_control) || | |
507 | !(rt2x00dev->hw->conf.flags & IEEE80211_CONF_PS))) | |
508 | return; | |
509 | ||
510 | /* min. beacon length + FCS_LEN */ | |
511 | if (skb->len <= 40 + FCS_LEN) | |
512 | return; | |
513 | ||
514 | /* and only beacons from the associated BSSID, please */ | |
515 | if (!(rxdesc->dev_flags & RXDONE_MY_BSS) || | |
516 | !rt2x00dev->aid) | |
517 | return; | |
518 | ||
519 | rt2x00dev->last_beacon = jiffies; | |
520 | ||
521 | tim = rt2x00lib_find_ie(skb->data, skb->len - FCS_LEN, WLAN_EID_TIM); | |
522 | if (!tim) | |
523 | return; | |
524 | ||
525 | if (tim[1] < sizeof(*tim_ie)) | |
526 | return; | |
527 | ||
528 | tim_len = tim[1]; | |
529 | tim_ie = (struct ieee80211_tim_ie *) &tim[2]; | |
530 | ||
531 | /* Check whenever the PHY can be turned off again. */ | |
532 | ||
533 | /* 1. What about buffered unicast traffic for our AID? */ | |
534 | cam = ieee80211_check_tim(tim_ie, tim_len, rt2x00dev->aid); | |
535 | ||
536 | /* 2. Maybe the AP wants to send multicast/broadcast data? */ | |
537 | cam |= (tim_ie->bitmap_ctrl & 0x01); | |
538 | ||
539 | if (!cam && !test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags)) | |
ed66ba47 | 540 | queue_work(rt2x00dev->workqueue, &rt2x00dev->sleep_work); |
1c0bcf89 ID |
541 | } |
542 | ||
35f00cfc ID |
543 | static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev, |
544 | struct rxdone_entry_desc *rxdesc) | |
545 | { | |
546 | struct ieee80211_supported_band *sband; | |
547 | const struct rt2x00_rate *rate; | |
548 | unsigned int i; | |
3590eea4 ID |
549 | int signal = rxdesc->signal; |
550 | int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK); | |
551 | ||
552 | switch (rxdesc->rate_mode) { | |
553 | case RATE_MODE_CCK: | |
554 | case RATE_MODE_OFDM: | |
555 | /* | |
556 | * For non-HT rates the MCS value needs to contain the | |
557 | * actually used rate modulation (CCK or OFDM). | |
558 | */ | |
559 | if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS) | |
560 | signal = RATE_MCS(rxdesc->rate_mode, signal); | |
561 | ||
562 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; | |
563 | for (i = 0; i < sband->n_bitrates; i++) { | |
564 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); | |
565 | if (((type == RXDONE_SIGNAL_PLCP) && | |
566 | (rate->plcp == signal)) || | |
567 | ((type == RXDONE_SIGNAL_BITRATE) && | |
568 | (rate->bitrate == signal)) || | |
569 | ((type == RXDONE_SIGNAL_MCS) && | |
570 | (rate->mcs == signal))) { | |
571 | return i; | |
572 | } | |
35f00cfc | 573 | } |
3590eea4 ID |
574 | break; |
575 | case RATE_MODE_HT_MIX: | |
576 | case RATE_MODE_HT_GREENFIELD: | |
577 | if (signal >= 0 && signal <= 76) | |
578 | return signal; | |
579 | break; | |
580 | default: | |
581 | break; | |
35f00cfc ID |
582 | } |
583 | ||
584 | WARNING(rt2x00dev, "Frame received with unrecognized signal, " | |
3590eea4 ID |
585 | "mode=0x%.4x, signal=0x%.4x, type=%d.\n", |
586 | rxdesc->rate_mode, signal, type); | |
35f00cfc ID |
587 | return 0; |
588 | } | |
589 | ||
fa69560f | 590 | void rt2x00lib_rxdone(struct queue_entry *entry) |
95ea3627 | 591 | { |
fa69560f | 592 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c4da0048 GW |
593 | struct rxdone_entry_desc rxdesc; |
594 | struct sk_buff *skb; | |
e5ef5bad | 595 | struct ieee80211_rx_status *rx_status; |
2bb057d0 | 596 | unsigned int header_length; |
35f00cfc | 597 | int rate_idx; |
7e613e16 | 598 | |
070192dd ID |
599 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
600 | !test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
601 | goto submit_entry; | |
602 | ||
7e613e16 ID |
603 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
604 | goto submit_entry; | |
605 | ||
c4da0048 GW |
606 | /* |
607 | * Allocate a new sk_buffer. If no new buffer available, drop the | |
608 | * received frame and reuse the existing buffer. | |
609 | */ | |
fa69560f | 610 | skb = rt2x00queue_alloc_rxskb(entry); |
c4da0048 | 611 | if (!skb) |
1550c8ef | 612 | goto submit_entry; |
c4da0048 GW |
613 | |
614 | /* | |
615 | * Unmap the skb. | |
616 | */ | |
fa69560f | 617 | rt2x00queue_unmap_skb(entry); |
c4da0048 GW |
618 | |
619 | /* | |
620 | * Extract the RXD details. | |
621 | */ | |
622 | memset(&rxdesc, 0, sizeof(rxdesc)); | |
623 | rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); | |
95ea3627 | 624 | |
7f503fc4 SG |
625 | /* |
626 | * Check for valid size in case we get corrupted descriptor from | |
627 | * hardware. | |
628 | */ | |
629 | if (unlikely(rxdesc.size == 0 || | |
630 | rxdesc.size > entry->queue->data_size)) { | |
631 | WARNING(rt2x00dev, "Wrong frame size %d max %d.\n", | |
632 | rxdesc.size, entry->queue->data_size); | |
633 | dev_kfree_skb(entry->skb); | |
634 | goto renew_skb; | |
635 | } | |
636 | ||
239c249d GW |
637 | /* |
638 | * The data behind the ieee80211 header must be | |
a9f853dd | 639 | * aligned on a 4 byte boundary. |
239c249d | 640 | */ |
2bb057d0 | 641 | header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
239c249d | 642 | |
2bb057d0 ID |
643 | /* |
644 | * Hardware might have stripped the IV/EIV/ICV data, | |
645 | * in that case it is possible that the data was | |
3ad2f3fb | 646 | * provided separately (through hardware descriptor) |
2bb057d0 ID |
647 | * in which case we should reinsert the data into the frame. |
648 | */ | |
74415edb | 649 | if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) && |
9f166171 | 650 | (rxdesc.flags & RX_FLAG_IV_STRIPPED)) |
daee6c09 | 651 | rt2x00crypto_rx_insert_iv(entry->skb, header_length, |
9f166171 | 652 | &rxdesc); |
b7340833 GW |
653 | else if (header_length && |
654 | (rxdesc.size > header_length) && | |
655 | (rxdesc.dev_flags & RXDONE_L2PAD)) | |
daee6c09 | 656 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
239c249d | 657 | |
1398d458 AB |
658 | /* Trim buffer to correct size */ |
659 | skb_trim(entry->skb, rxdesc.size); | |
660 | ||
95ea3627 | 661 | /* |
3590eea4 | 662 | * Translate the signal to the correct bitrate index. |
95ea3627 | 663 | */ |
3590eea4 ID |
664 | rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc); |
665 | if (rxdesc.rate_mode == RATE_MODE_HT_MIX || | |
666 | rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD) | |
35f00cfc | 667 | rxdesc.flags |= RX_FLAG_HT; |
866a0503 | 668 | |
1c0bcf89 ID |
669 | /* |
670 | * Check if this is a beacon, and more frames have been | |
671 | * buffered while we were in powersaving mode. | |
672 | */ | |
673 | rt2x00lib_rxdone_check_ps(rt2x00dev, entry->skb, &rxdesc); | |
674 | ||
61af43c5 | 675 | /* |
84e3196f | 676 | * Update extra components |
61af43c5 | 677 | */ |
84e3196f ID |
678 | rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc); |
679 | rt2x00debug_update_crypto(rt2x00dev, &rxdesc); | |
e5ef5bad | 680 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); |
69f81a2c | 681 | |
e5ef5bad ID |
682 | /* |
683 | * Initialize RX status information, and send frame | |
684 | * to mac80211. | |
685 | */ | |
686 | rx_status = IEEE80211_SKB_RXCB(entry->skb); | |
ae73e58e | 687 | rx_status->mactime = rxdesc.timestamp; |
e5ef5bad ID |
688 | rx_status->band = rt2x00dev->curr_band; |
689 | rx_status->freq = rt2x00dev->curr_freq; | |
35f00cfc | 690 | rx_status->rate_idx = rate_idx; |
c4da0048 GW |
691 | rx_status->signal = rxdesc.rssi; |
692 | rx_status->flag = rxdesc.flags; | |
69f81a2c | 693 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 | 694 | |
7e613e16 | 695 | ieee80211_rx_ni(rt2x00dev->hw, entry->skb); |
c4da0048 | 696 | |
7f503fc4 | 697 | renew_skb: |
c4da0048 GW |
698 | /* |
699 | * Replace the skb with the freshly allocated one. | |
700 | */ | |
701 | entry->skb = skb; | |
d74f5ba4 | 702 | |
7e613e16 | 703 | submit_entry: |
070192dd | 704 | entry->flags = 0; |
75256f03 | 705 | rt2x00queue_index_inc(entry, Q_INDEX_DONE); |
070192dd | 706 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && |
64e7d723 | 707 | test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
070192dd | 708 | rt2x00dev->ops->lib->clear_entry(entry); |
95ea3627 ID |
709 | } |
710 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
711 | ||
95ea3627 ID |
712 | /* |
713 | * Driver initialization handlers. | |
714 | */ | |
70e2fed4 ID |
715 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
716 | { | |
3d8606a6 | 717 | .flags = DEV_RATE_CCK, |
70e2fed4 | 718 | .bitrate = 10, |
aa776721 | 719 | .ratemask = BIT(0), |
70e2fed4 | 720 | .plcp = 0x00, |
35f00cfc | 721 | .mcs = RATE_MCS(RATE_MODE_CCK, 0), |
70e2fed4 ID |
722 | }, |
723 | { | |
3d8606a6 | 724 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 725 | .bitrate = 20, |
aa776721 | 726 | .ratemask = BIT(1), |
70e2fed4 | 727 | .plcp = 0x01, |
35f00cfc | 728 | .mcs = RATE_MCS(RATE_MODE_CCK, 1), |
70e2fed4 ID |
729 | }, |
730 | { | |
3d8606a6 | 731 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 732 | .bitrate = 55, |
aa776721 | 733 | .ratemask = BIT(2), |
70e2fed4 | 734 | .plcp = 0x02, |
35f00cfc | 735 | .mcs = RATE_MCS(RATE_MODE_CCK, 2), |
70e2fed4 ID |
736 | }, |
737 | { | |
3d8606a6 | 738 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 739 | .bitrate = 110, |
aa776721 | 740 | .ratemask = BIT(3), |
70e2fed4 | 741 | .plcp = 0x03, |
35f00cfc | 742 | .mcs = RATE_MCS(RATE_MODE_CCK, 3), |
70e2fed4 ID |
743 | }, |
744 | { | |
3d8606a6 | 745 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 746 | .bitrate = 60, |
aa776721 | 747 | .ratemask = BIT(4), |
70e2fed4 | 748 | .plcp = 0x0b, |
35f00cfc | 749 | .mcs = RATE_MCS(RATE_MODE_OFDM, 0), |
70e2fed4 ID |
750 | }, |
751 | { | |
752 | .flags = DEV_RATE_OFDM, | |
753 | .bitrate = 90, | |
aa776721 | 754 | .ratemask = BIT(5), |
70e2fed4 | 755 | .plcp = 0x0f, |
35f00cfc | 756 | .mcs = RATE_MCS(RATE_MODE_OFDM, 1), |
70e2fed4 ID |
757 | }, |
758 | { | |
3d8606a6 | 759 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 760 | .bitrate = 120, |
aa776721 | 761 | .ratemask = BIT(6), |
70e2fed4 | 762 | .plcp = 0x0a, |
35f00cfc | 763 | .mcs = RATE_MCS(RATE_MODE_OFDM, 2), |
70e2fed4 ID |
764 | }, |
765 | { | |
766 | .flags = DEV_RATE_OFDM, | |
767 | .bitrate = 180, | |
aa776721 | 768 | .ratemask = BIT(7), |
70e2fed4 | 769 | .plcp = 0x0e, |
35f00cfc | 770 | .mcs = RATE_MCS(RATE_MODE_OFDM, 3), |
70e2fed4 ID |
771 | }, |
772 | { | |
3d8606a6 | 773 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 774 | .bitrate = 240, |
aa776721 | 775 | .ratemask = BIT(8), |
70e2fed4 | 776 | .plcp = 0x09, |
35f00cfc | 777 | .mcs = RATE_MCS(RATE_MODE_OFDM, 4), |
70e2fed4 ID |
778 | }, |
779 | { | |
780 | .flags = DEV_RATE_OFDM, | |
781 | .bitrate = 360, | |
aa776721 | 782 | .ratemask = BIT(9), |
70e2fed4 | 783 | .plcp = 0x0d, |
35f00cfc | 784 | .mcs = RATE_MCS(RATE_MODE_OFDM, 5), |
70e2fed4 ID |
785 | }, |
786 | { | |
787 | .flags = DEV_RATE_OFDM, | |
788 | .bitrate = 480, | |
aa776721 | 789 | .ratemask = BIT(10), |
70e2fed4 | 790 | .plcp = 0x08, |
35f00cfc | 791 | .mcs = RATE_MCS(RATE_MODE_OFDM, 6), |
70e2fed4 ID |
792 | }, |
793 | { | |
794 | .flags = DEV_RATE_OFDM, | |
795 | .bitrate = 540, | |
aa776721 | 796 | .ratemask = BIT(11), |
70e2fed4 | 797 | .plcp = 0x0c, |
35f00cfc | 798 | .mcs = RATE_MCS(RATE_MODE_OFDM, 7), |
70e2fed4 ID |
799 | }, |
800 | }; | |
801 | ||
95ea3627 ID |
802 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
803 | const int channel, const int tx_power, | |
804 | const int value) | |
805 | { | |
59eb21a6 BR |
806 | /* XXX: this assumption about the band is wrong for 802.11j */ |
807 | entry->band = channel <= 14 ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
808 | entry->center_freq = ieee80211_channel_to_frequency(channel, | |
809 | entry->band); | |
8318d78a JB |
810 | entry->hw_value = value; |
811 | entry->max_power = tx_power; | |
812 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
813 | } |
814 | ||
815 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 816 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 817 | { |
70e2fed4 ID |
818 | entry->flags = 0; |
819 | entry->bitrate = rate->bitrate; | |
c2361bae | 820 | entry->hw_value = index; |
3ea96463 | 821 | entry->hw_value_short = index; |
70e2fed4 | 822 | |
3ea96463 | 823 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) |
70e2fed4 | 824 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; |
95ea3627 ID |
825 | } |
826 | ||
827 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
828 | struct hw_mode_spec *spec) | |
829 | { | |
830 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
95ea3627 ID |
831 | struct ieee80211_channel *channels; |
832 | struct ieee80211_rate *rates; | |
31562e80 | 833 | unsigned int num_rates; |
95ea3627 | 834 | unsigned int i; |
95ea3627 | 835 | |
31562e80 ID |
836 | num_rates = 0; |
837 | if (spec->supported_rates & SUPPORT_RATE_CCK) | |
838 | num_rates += 4; | |
839 | if (spec->supported_rates & SUPPORT_RATE_OFDM) | |
840 | num_rates += 8; | |
95ea3627 | 841 | |
839fafbe | 842 | channels = kcalloc(spec->num_channels, sizeof(*channels), GFP_KERNEL); |
95ea3627 | 843 | if (!channels) |
8318d78a | 844 | return -ENOMEM; |
95ea3627 | 845 | |
839fafbe | 846 | rates = kcalloc(num_rates, sizeof(*rates), GFP_KERNEL); |
95ea3627 ID |
847 | if (!rates) |
848 | goto exit_free_channels; | |
849 | ||
850 | /* | |
851 | * Initialize Rate list. | |
852 | */ | |
31562e80 | 853 | for (i = 0; i < num_rates; i++) |
8f5fa7f0 | 854 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
855 | |
856 | /* | |
857 | * Initialize Channel list. | |
858 | */ | |
859 | for (i = 0; i < spec->num_channels; i++) { | |
95ea3627 | 860 | rt2x00lib_channel(&channels[i], |
8c5e7a5f | 861 | spec->channels[i].channel, |
8d1331b3 | 862 | spec->channels_info[i].max_power, i); |
95ea3627 ID |
863 | } |
864 | ||
865 | /* | |
31562e80 | 866 | * Intitialize 802.11b, 802.11g |
95ea3627 | 867 | * Rates: CCK, OFDM. |
8318d78a | 868 | * Channels: 2.4 GHz |
95ea3627 | 869 | */ |
47ac2683 | 870 | if (spec->supported_bands & SUPPORT_BAND_2GHZ) { |
31562e80 ID |
871 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14; |
872 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates; | |
873 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels; | |
874 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
875 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
876 | &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
35f00cfc ID |
877 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap, |
878 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
879 | } |
880 | ||
881 | /* | |
882 | * Intitialize 802.11a | |
883 | * Rates: OFDM. | |
884 | * Channels: OFDM, UNII, HiperLAN2. | |
885 | */ | |
47ac2683 | 886 | if (spec->supported_bands & SUPPORT_BAND_5GHZ) { |
31562e80 ID |
887 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels = |
888 | spec->num_channels - 14; | |
889 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates = | |
890 | num_rates - 4; | |
891 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
892 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
893 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
894 | &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
35f00cfc ID |
895 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap, |
896 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
897 | } |
898 | ||
95ea3627 ID |
899 | return 0; |
900 | ||
8318d78a | 901 | exit_free_channels: |
95ea3627 | 902 | kfree(channels); |
95ea3627 ID |
903 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
904 | return -ENOMEM; | |
905 | } | |
906 | ||
907 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
908 | { | |
0262ab0d | 909 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
910 | ieee80211_unregister_hw(rt2x00dev->hw); |
911 | ||
8318d78a JB |
912 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
913 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
914 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
915 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
916 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 | 917 | } |
8c5e7a5f ID |
918 | |
919 | kfree(rt2x00dev->spec.channels_info); | |
95ea3627 ID |
920 | } |
921 | ||
922 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
923 | { | |
924 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
925 | int status; | |
926 | ||
0262ab0d ID |
927 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
928 | return 0; | |
929 | ||
95ea3627 ID |
930 | /* |
931 | * Initialize HW modes. | |
932 | */ | |
933 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
934 | if (status) | |
935 | return status; | |
936 | ||
61448f88 GW |
937 | /* |
938 | * Initialize HW fields. | |
939 | */ | |
940 | rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues; | |
941 | ||
e6218cc4 GW |
942 | /* |
943 | * Initialize extra TX headroom required. | |
944 | */ | |
7a4a77b7 GW |
945 | rt2x00dev->hw->extra_tx_headroom = |
946 | max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM, | |
947 | rt2x00dev->ops->extra_tx_headroom); | |
948 | ||
949 | /* | |
950 | * Take TX headroom required for alignment into account. | |
951 | */ | |
7dab73b3 | 952 | if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) |
7a4a77b7 | 953 | rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE; |
7dab73b3 | 954 | else if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) |
7a4a77b7 | 955 | rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE; |
e6218cc4 | 956 | |
b4943d81 HS |
957 | /* |
958 | * Tell mac80211 about the size of our private STA structure. | |
959 | */ | |
960 | rt2x00dev->hw->sta_data_size = sizeof(struct rt2x00_sta); | |
961 | ||
96c3da7d HS |
962 | /* |
963 | * Allocate tx status FIFO for driver use. | |
964 | */ | |
7dab73b3 | 965 | if (test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags)) { |
96c3da7d | 966 | /* |
f78987cf HS |
967 | * Allocate the txstatus fifo. In the worst case the tx |
968 | * status fifo has to hold the tx status of all entries | |
969 | * in all tx queues. Hence, calculate the kfifo size as | |
970 | * tx_queues * entry_num and round up to the nearest | |
971 | * power of 2. | |
96c3da7d | 972 | */ |
f78987cf HS |
973 | int kfifo_size = |
974 | roundup_pow_of_two(rt2x00dev->ops->tx_queues * | |
975 | rt2x00dev->ops->tx->entry_num * | |
976 | sizeof(u32)); | |
977 | ||
978 | status = kfifo_alloc(&rt2x00dev->txstatus_fifo, kfifo_size, | |
96c3da7d HS |
979 | GFP_KERNEL); |
980 | if (status) | |
981 | return status; | |
96c3da7d HS |
982 | } |
983 | ||
c5c65761 HS |
984 | /* |
985 | * Initialize tasklets if used by the driver. Tasklets are | |
986 | * disabled until the interrupts are turned on. The driver | |
987 | * has to handle that. | |
988 | */ | |
989 | #define RT2X00_TASKLET_INIT(taskletname) \ | |
990 | if (rt2x00dev->ops->lib->taskletname) { \ | |
991 | tasklet_init(&rt2x00dev->taskletname, \ | |
992 | rt2x00dev->ops->lib->taskletname, \ | |
993 | (unsigned long)rt2x00dev); \ | |
c5c65761 HS |
994 | } |
995 | ||
c8e15a1e | 996 | RT2X00_TASKLET_INIT(txstatus_tasklet); |
c5c65761 HS |
997 | RT2X00_TASKLET_INIT(pretbtt_tasklet); |
998 | RT2X00_TASKLET_INIT(tbtt_tasklet); | |
999 | RT2X00_TASKLET_INIT(rxdone_tasklet); | |
1000 | RT2X00_TASKLET_INIT(autowake_tasklet); | |
1001 | ||
1002 | #undef RT2X00_TASKLET_INIT | |
1003 | ||
95ea3627 ID |
1004 | /* |
1005 | * Register HW. | |
1006 | */ | |
1007 | status = ieee80211_register_hw(rt2x00dev->hw); | |
f05faa31 | 1008 | if (status) |
95ea3627 | 1009 | return status; |
95ea3627 | 1010 | |
0262ab0d | 1011 | set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
1012 | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * Initialization/uninitialization handlers. | |
1018 | */ | |
e37ea213 | 1019 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 | 1020 | { |
0262ab0d | 1021 | if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
1022 | return; |
1023 | ||
1024 | /* | |
1682fe6d | 1025 | * Unregister extra components. |
95ea3627 ID |
1026 | */ |
1027 | rt2x00rfkill_unregister(rt2x00dev); | |
1028 | ||
1029 | /* | |
1030 | * Allow the HW to uninitialize. | |
1031 | */ | |
1032 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1033 | ||
1034 | /* | |
181d6902 | 1035 | * Free allocated queue entries. |
95ea3627 | 1036 | */ |
181d6902 | 1037 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
1038 | } |
1039 | ||
e37ea213 | 1040 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1041 | { |
1042 | int status; | |
1043 | ||
0262ab0d | 1044 | if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
1045 | return 0; |
1046 | ||
1047 | /* | |
181d6902 | 1048 | * Allocate all queue entries. |
95ea3627 | 1049 | */ |
181d6902 ID |
1050 | status = rt2x00queue_initialize(rt2x00dev); |
1051 | if (status) | |
95ea3627 | 1052 | return status; |
95ea3627 ID |
1053 | |
1054 | /* | |
1055 | * Initialize the device. | |
1056 | */ | |
1057 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
ed499983 ID |
1058 | if (status) { |
1059 | rt2x00queue_uninitialize(rt2x00dev); | |
1060 | return status; | |
1061 | } | |
95ea3627 | 1062 | |
0262ab0d | 1063 | set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags); |
95ea3627 | 1064 | |
95ea3627 | 1065 | return 0; |
95ea3627 ID |
1066 | } |
1067 | ||
e37ea213 ID |
1068 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1069 | { | |
1070 | int retval; | |
1071 | ||
0262ab0d | 1072 | if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
1073 | return 0; |
1074 | ||
1075 | /* | |
1076 | * If this is the first interface which is added, | |
1077 | * we should load the firmware now. | |
1078 | */ | |
9404ef34 ID |
1079 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1080 | if (retval) | |
1081 | return retval; | |
e37ea213 ID |
1082 | |
1083 | /* | |
1084 | * Initialize the device. | |
1085 | */ | |
1086 | retval = rt2x00lib_initialize(rt2x00dev); | |
1087 | if (retval) | |
1088 | return retval; | |
1089 | ||
6bb40dd1 ID |
1090 | rt2x00dev->intf_ap_count = 0; |
1091 | rt2x00dev->intf_sta_count = 0; | |
1092 | rt2x00dev->intf_associated = 0; | |
1093 | ||
bdfa500b ID |
1094 | /* Enable the radio */ |
1095 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1f0280cb | 1096 | if (retval) |
bdfa500b | 1097 | return retval; |
bdfa500b | 1098 | |
0262ab0d | 1099 | set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags); |
e37ea213 ID |
1100 | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1105 | { | |
0262ab0d | 1106 | if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
1107 | return; |
1108 | ||
1109 | /* | |
1110 | * Perhaps we can add something smarter here, | |
1111 | * but for now just disabling the radio should do. | |
1112 | */ | |
1113 | rt2x00lib_disable_radio(rt2x00dev); | |
1114 | ||
6bb40dd1 ID |
1115 | rt2x00dev->intf_ap_count = 0; |
1116 | rt2x00dev->intf_sta_count = 0; | |
1117 | rt2x00dev->intf_associated = 0; | |
e37ea213 ID |
1118 | } |
1119 | ||
95ea3627 ID |
1120 | /* |
1121 | * driver allocation handlers. | |
1122 | */ | |
95ea3627 ID |
1123 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1124 | { | |
1125 | int retval = -ENOMEM; | |
1126 | ||
1ebbc485 GW |
1127 | /* |
1128 | * Allocate the driver data memory, if necessary. | |
1129 | */ | |
1130 | if (rt2x00dev->ops->drv_data_size > 0) { | |
1131 | rt2x00dev->drv_data = kzalloc(rt2x00dev->ops->drv_data_size, | |
1132 | GFP_KERNEL); | |
1133 | if (!rt2x00dev->drv_data) { | |
1134 | retval = -ENOMEM; | |
1135 | goto exit; | |
1136 | } | |
1137 | } | |
1138 | ||
c5c65761 | 1139 | spin_lock_init(&rt2x00dev->irqmask_lock); |
8ff48a8b ID |
1140 | mutex_init(&rt2x00dev->csr_mutex); |
1141 | ||
66f84d65 SC |
1142 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
1143 | ||
6bb40dd1 ID |
1144 | /* |
1145 | * Make room for rt2x00_intf inside the per-interface | |
1146 | * structure ieee80211_vif. | |
1147 | */ | |
1148 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1149 | ||
3514a441 ID |
1150 | /* |
1151 | * Determine which operating modes are supported, all modes | |
1152 | * which require beaconing, depend on the availability of | |
1153 | * beacon entries. | |
1154 | */ | |
1155 | rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); | |
1156 | if (rt2x00dev->ops->bcn->entry_num > 0) | |
1157 | rt2x00dev->hw->wiphy->interface_modes |= | |
1158 | BIT(NL80211_IFTYPE_ADHOC) | | |
a07dbea2 | 1159 | BIT(NL80211_IFTYPE_AP) | |
ce292a64 ID |
1160 | BIT(NL80211_IFTYPE_MESH_POINT) | |
1161 | BIT(NL80211_IFTYPE_WDS); | |
f59ac048 | 1162 | |
9acd56d3 | 1163 | /* |
0439f536 | 1164 | * Initialize work. |
9acd56d3 | 1165 | */ |
0439f536 ID |
1166 | rt2x00dev->workqueue = |
1167 | alloc_ordered_workqueue(wiphy_name(rt2x00dev->hw->wiphy), 0); | |
1168 | if (!rt2x00dev->workqueue) { | |
1169 | retval = -ENOMEM; | |
1170 | goto exit; | |
1171 | } | |
1172 | ||
9acd56d3 | 1173 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
1c0bcf89 | 1174 | INIT_DELAYED_WORK(&rt2x00dev->autowakeup_work, rt2x00lib_autowakeup); |
ed66ba47 | 1175 | INIT_WORK(&rt2x00dev->sleep_work, rt2x00lib_sleep); |
9acd56d3 | 1176 | |
95ea3627 ID |
1177 | /* |
1178 | * Let the driver probe the device to detect the capabilities. | |
1179 | */ | |
1180 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1181 | if (retval) { | |
1182 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1183 | goto exit; | |
1184 | } | |
1185 | ||
95ea3627 | 1186 | /* |
181d6902 | 1187 | * Allocate queue array. |
95ea3627 | 1188 | */ |
181d6902 | 1189 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1190 | if (retval) |
1191 | goto exit; | |
1192 | ||
1193 | /* | |
1194 | * Initialize ieee80211 structure. | |
1195 | */ | |
1196 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1197 | if (retval) { | |
1198 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1199 | goto exit; | |
1200 | } | |
1201 | ||
a9450b70 | 1202 | /* |
1682fe6d | 1203 | * Register extra components. |
a9450b70 | 1204 | */ |
84e3196f | 1205 | rt2x00link_register(rt2x00dev); |
a9450b70 | 1206 | rt2x00leds_register(rt2x00dev); |
95ea3627 | 1207 | rt2x00debug_register(rt2x00dev); |
e2bc7c5f | 1208 | rt2x00rfkill_register(rt2x00dev); |
95ea3627 ID |
1209 | |
1210 | return 0; | |
1211 | ||
1212 | exit: | |
1213 | rt2x00lib_remove_dev(rt2x00dev); | |
1214 | ||
1215 | return retval; | |
1216 | } | |
1217 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1218 | ||
1219 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1220 | { | |
0262ab0d | 1221 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
066cb637 | 1222 | |
95ea3627 ID |
1223 | /* |
1224 | * Disable radio. | |
1225 | */ | |
1226 | rt2x00lib_disable_radio(rt2x00dev); | |
1227 | ||
d8cc8926 PR |
1228 | /* |
1229 | * Stop all work. | |
1230 | */ | |
d8cc8926 | 1231 | cancel_work_sync(&rt2x00dev->intf_work); |
3bb42a64 | 1232 | cancel_delayed_work_sync(&rt2x00dev->autowakeup_work); |
ed66ba47 | 1233 | cancel_work_sync(&rt2x00dev->sleep_work); |
37f4ee0b | 1234 | if (rt2x00_is_usb(rt2x00dev)) { |
f421111b | 1235 | hrtimer_cancel(&rt2x00dev->txstatus_timer); |
37f4ee0b SG |
1236 | cancel_work_sync(&rt2x00dev->rxdone_work); |
1237 | cancel_work_sync(&rt2x00dev->txdone_work); | |
1238 | } | |
7be08153 GJ |
1239 | if (rt2x00dev->workqueue) |
1240 | destroy_workqueue(rt2x00dev->workqueue); | |
d8cc8926 | 1241 | |
96c3da7d HS |
1242 | /* |
1243 | * Free the tx status fifo. | |
1244 | */ | |
1245 | kfifo_free(&rt2x00dev->txstatus_fifo); | |
1246 | ||
1247 | /* | |
1248 | * Kill the tx status tasklet. | |
1249 | */ | |
1250 | tasklet_kill(&rt2x00dev->txstatus_tasklet); | |
e1f4e808 ID |
1251 | tasklet_kill(&rt2x00dev->pretbtt_tasklet); |
1252 | tasklet_kill(&rt2x00dev->tbtt_tasklet); | |
1253 | tasklet_kill(&rt2x00dev->rxdone_tasklet); | |
1254 | tasklet_kill(&rt2x00dev->autowake_tasklet); | |
96c3da7d | 1255 | |
95ea3627 ID |
1256 | /* |
1257 | * Uninitialize device. | |
1258 | */ | |
1259 | rt2x00lib_uninitialize(rt2x00dev); | |
1260 | ||
1261 | /* | |
1682fe6d | 1262 | * Free extra components |
95ea3627 ID |
1263 | */ |
1264 | rt2x00debug_deregister(rt2x00dev); | |
a9450b70 ID |
1265 | rt2x00leds_unregister(rt2x00dev); |
1266 | ||
95ea3627 ID |
1267 | /* |
1268 | * Free ieee80211_hw memory. | |
1269 | */ | |
1270 | rt2x00lib_remove_hw(rt2x00dev); | |
1271 | ||
1272 | /* | |
1273 | * Free firmware image. | |
1274 | */ | |
1275 | rt2x00lib_free_firmware(rt2x00dev); | |
1276 | ||
1277 | /* | |
181d6902 | 1278 | * Free queue structures. |
95ea3627 | 1279 | */ |
181d6902 | 1280 | rt2x00queue_free(rt2x00dev); |
1ebbc485 GW |
1281 | |
1282 | /* | |
1283 | * Free the driver data. | |
1284 | */ | |
1285 | if (rt2x00dev->drv_data) | |
1286 | kfree(rt2x00dev->drv_data); | |
95ea3627 ID |
1287 | } |
1288 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1289 | ||
1290 | /* | |
1291 | * Device state handlers | |
1292 | */ | |
1293 | #ifdef CONFIG_PM | |
1294 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1295 | { | |
95ea3627 | 1296 | NOTICE(rt2x00dev, "Going to sleep.\n"); |
066cb637 ID |
1297 | |
1298 | /* | |
07126127 | 1299 | * Prevent mac80211 from accessing driver while suspended. |
066cb637 | 1300 | */ |
07126127 ID |
1301 | if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
1302 | return 0; | |
95ea3627 ID |
1303 | |
1304 | /* | |
07126127 | 1305 | * Cleanup as much as possible. |
95ea3627 | 1306 | */ |
95ea3627 | 1307 | rt2x00lib_uninitialize(rt2x00dev); |
1682fe6d ID |
1308 | |
1309 | /* | |
1310 | * Suspend/disable extra components. | |
1311 | */ | |
a9450b70 | 1312 | rt2x00leds_suspend(rt2x00dev); |
95ea3627 ID |
1313 | rt2x00debug_deregister(rt2x00dev); |
1314 | ||
1315 | /* | |
9896322a ID |
1316 | * Set device mode to sleep for power management, |
1317 | * on some hardware this call seems to consistently fail. | |
1318 | * From the specifications it is hard to tell why it fails, | |
1319 | * and if this is a "bad thing". | |
1320 | * Overall it is safe to just ignore the failure and | |
1321 | * continue suspending. The only downside is that the | |
1322 | * device will not be in optimal power save mode, but with | |
1323 | * the radio and the other components already disabled the | |
1324 | * device is as good as disabled. | |
95ea3627 | 1325 | */ |
07126127 | 1326 | if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP)) |
9896322a ID |
1327 | WARNING(rt2x00dev, "Device failed to enter sleep state, " |
1328 | "continue suspending.\n"); | |
95ea3627 ID |
1329 | |
1330 | return 0; | |
1331 | } | |
1332 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1333 | ||
1334 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) | |
1335 | { | |
95ea3627 | 1336 | NOTICE(rt2x00dev, "Waking up.\n"); |
95ea3627 ID |
1337 | |
1338 | /* | |
1682fe6d | 1339 | * Restore/enable extra components. |
95ea3627 ID |
1340 | */ |
1341 | rt2x00debug_register(rt2x00dev); | |
a9450b70 | 1342 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1343 | |
e37ea213 ID |
1344 | /* |
1345 | * We are ready again to receive requests from mac80211. | |
1346 | */ | |
0262ab0d | 1347 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
e37ea213 | 1348 | |
95ea3627 | 1349 | return 0; |
95ea3627 ID |
1350 | } |
1351 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1352 | #endif /* CONFIG_PM */ | |
1353 | ||
1354 | /* | |
1355 | * rt2x00lib module information. | |
1356 | */ | |
1357 | MODULE_AUTHOR(DRV_PROJECT); | |
1358 | MODULE_VERSION(DRV_VERSION); | |
1359 | MODULE_DESCRIPTION("rt2x00 library"); | |
1360 | MODULE_LICENSE("GPL"); |