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); |
95ea3627 | 91 | |
c965c74b ID |
92 | /* |
93 | * Start watchdog monitoring. | |
94 | */ | |
95 | rt2x00link_start_watchdog(rt2x00dev); | |
96 | ||
95ea3627 ID |
97 | return 0; |
98 | } | |
99 | ||
100 | void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) | |
101 | { | |
0262ab0d | 102 | if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
95ea3627 ID |
103 | return; |
104 | ||
c965c74b ID |
105 | /* |
106 | * Stop watchdog monitoring. | |
107 | */ | |
108 | rt2x00link_stop_watchdog(rt2x00dev); | |
109 | ||
95ea3627 | 110 | /* |
0b7fde54 | 111 | * Stop all queues |
95ea3627 | 112 | */ |
9e33a355 | 113 | rt2x00link_stop_agc(rt2x00dev); |
ea175ee2 | 114 | rt2x00link_stop_tuner(rt2x00dev); |
0b7fde54 | 115 | rt2x00queue_stop_queues(rt2x00dev); |
5be65609 | 116 | rt2x00queue_flush_queues(rt2x00dev, true); |
95ea3627 ID |
117 | |
118 | /* | |
119 | * Disable radio. | |
120 | */ | |
121 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); | |
2b08da3f | 122 | rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF); |
61c2b682 | 123 | rt2x00led_led_activity(rt2x00dev, false); |
a2e1d52a | 124 | rt2x00leds_led_radio(rt2x00dev, false); |
95ea3627 ID |
125 | } |
126 | ||
6bb40dd1 ID |
127 | static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac, |
128 | struct ieee80211_vif *vif) | |
5c58ee51 | 129 | { |
6bb40dd1 ID |
130 | struct rt2x00_dev *rt2x00dev = data; |
131 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
6bb40dd1 | 132 | |
980dfcb9 ID |
133 | /* |
134 | * It is possible the radio was disabled while the work had been | |
135 | * scheduled. If that happens we should return here immediately, | |
136 | * note that in the spinlock protected area above the delayed_flags | |
137 | * have been cleared correctly. | |
138 | */ | |
0262ab0d | 139 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
980dfcb9 ID |
140 | return; |
141 | ||
bfe6a15d | 142 | if (test_and_clear_bit(DELAYED_UPDATE_BEACON, &intf->delayed_flags)) |
69cf36a4 | 143 | rt2x00queue_update_beacon(rt2x00dev, vif); |
6bb40dd1 | 144 | } |
5c58ee51 | 145 | |
6bb40dd1 ID |
146 | static void rt2x00lib_intf_scheduled(struct work_struct *work) |
147 | { | |
148 | struct rt2x00_dev *rt2x00dev = | |
149 | container_of(work, struct rt2x00_dev, intf_work); | |
471b3efd JB |
150 | |
151 | /* | |
6bb40dd1 ID |
152 | * Iterate over each interface and perform the |
153 | * requested configurations. | |
471b3efd | 154 | */ |
6bb40dd1 ID |
155 | ieee80211_iterate_active_interfaces(rt2x00dev->hw, |
156 | rt2x00lib_intf_scheduled_iter, | |
157 | rt2x00dev); | |
5c58ee51 ID |
158 | } |
159 | ||
1c0bcf89 ID |
160 | static void rt2x00lib_autowakeup(struct work_struct *work) |
161 | { | |
162 | struct rt2x00_dev *rt2x00dev = | |
163 | container_of(work, struct rt2x00_dev, autowakeup_work.work); | |
164 | ||
3bb42a64 SG |
165 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
166 | return; | |
167 | ||
1c0bcf89 ID |
168 | if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE)) |
169 | ERROR(rt2x00dev, "Device failed to wakeup.\n"); | |
170 | clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags); | |
171 | } | |
172 | ||
95ea3627 ID |
173 | /* |
174 | * Interrupt context handlers. | |
175 | */ | |
07896fe2 HS |
176 | static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac, |
177 | struct ieee80211_vif *vif) | |
178 | { | |
179 | struct rt2x00_dev *rt2x00dev = data; | |
180 | struct sk_buff *skb; | |
181 | ||
182 | /* | |
183 | * Only AP mode interfaces do broad- and multicast buffering | |
184 | */ | |
185 | if (vif->type != NL80211_IFTYPE_AP) | |
186 | return; | |
187 | ||
188 | /* | |
189 | * Send out buffered broad- and multicast frames | |
190 | */ | |
191 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
192 | while (skb) { | |
193 | rt2x00mac_tx(rt2x00dev->hw, skb); | |
194 | skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif); | |
195 | } | |
196 | } | |
197 | ||
9f926fb5 HS |
198 | static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac, |
199 | struct ieee80211_vif *vif) | |
95ea3627 | 200 | { |
4dee32f5 | 201 | struct rt2x00_dev *rt2x00dev = data; |
95ea3627 | 202 | |
05c914fe | 203 | if (vif->type != NL80211_IFTYPE_AP && |
a07dbea2 | 204 | vif->type != NL80211_IFTYPE_ADHOC && |
ce292a64 ID |
205 | vif->type != NL80211_IFTYPE_MESH_POINT && |
206 | vif->type != NL80211_IFTYPE_WDS) | |
95ea3627 ID |
207 | return; |
208 | ||
8d59c4e9 HS |
209 | /* |
210 | * Update the beacon without locking. This is safe on PCI devices | |
211 | * as they only update the beacon periodically here. This should | |
212 | * never be called for USB devices. | |
213 | */ | |
214 | WARN_ON(rt2x00_is_usb(rt2x00dev)); | |
215 | rt2x00queue_update_beacon_locked(rt2x00dev, vif); | |
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 */ |
8d59c4e9 HS |
224 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
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 | */ | |
7dab73b3 | 232 | if (test_bit(CAPABILITY_PRE_TBTT_INTERRUPT, &rt2x00dev->cap_flags)) |
9f926fb5 | 233 | return; |
07896fe2 HS |
234 | |
235 | /* fetch next beacon */ | |
8d59c4e9 HS |
236 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
237 | rt2x00lib_beaconupdate_iter, | |
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 */ | |
8d59c4e9 HS |
248 | ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, |
249 | rt2x00lib_beaconupdate_iter, | |
250 | rt2x00dev); | |
9f926fb5 HS |
251 | } |
252 | EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt); | |
253 | ||
64e7d723 ID |
254 | void rt2x00lib_dmastart(struct queue_entry *entry) |
255 | { | |
256 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); | |
75256f03 | 257 | rt2x00queue_index_inc(entry, Q_INDEX); |
64e7d723 ID |
258 | } |
259 | EXPORT_SYMBOL_GPL(rt2x00lib_dmastart); | |
260 | ||
652a9dd2 ID |
261 | void rt2x00lib_dmadone(struct queue_entry *entry) |
262 | { | |
dba5dc1a | 263 | set_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags); |
a13c8f31 | 264 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
75256f03 | 265 | rt2x00queue_index_inc(entry, Q_INDEX_DMA_DONE); |
652a9dd2 ID |
266 | } |
267 | EXPORT_SYMBOL_GPL(rt2x00lib_dmadone); | |
268 | ||
181d6902 ID |
269 | void rt2x00lib_txdone(struct queue_entry *entry, |
270 | struct txdone_entry_desc *txdesc) | |
95ea3627 | 271 | { |
181d6902 | 272 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
e039fa4a | 273 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
e6a9854b | 274 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
f8eaec65 | 275 | unsigned int header_length, i; |
92ed48e5 | 276 | u8 rate_idx, rate_flags, retry_rates; |
7351c6bd | 277 | u8 skbdesc_flags = skbdesc->flags; |
2e27cff8 | 278 | bool success; |
d74f5ba4 | 279 | |
e513a0b6 GW |
280 | /* |
281 | * Unmap the skb. | |
282 | */ | |
fa69560f | 283 | rt2x00queue_unmap_skb(entry); |
e513a0b6 GW |
284 | |
285 | /* | |
286 | * Remove the extra tx headroom from the skb. | |
287 | */ | |
288 | skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom); | |
289 | ||
290 | /* | |
291 | * Signal that the TX descriptor is no longer in the skb. | |
292 | */ | |
293 | skbdesc->flags &= ~SKBDESC_DESC_IN_SKB; | |
294 | ||
f8eaec65 RJH |
295 | /* |
296 | * Determine the length of 802.11 header. | |
297 | */ | |
298 | header_length = ieee80211_get_hdrlen_from_skb(entry->skb); | |
299 | ||
9f166171 ID |
300 | /* |
301 | * Remove L2 padding which was added during | |
302 | */ | |
7dab73b3 | 303 | if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) |
daee6c09 | 304 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
9f166171 | 305 | |
2bb057d0 ID |
306 | /* |
307 | * If the IV/EIV data was stripped from the frame before it was | |
308 | * passed to the hardware, we should now reinsert it again because | |
77c2061d | 309 | * mac80211 will expect the same data to be present it the |
2bb057d0 ID |
310 | * frame as it was passed to us. |
311 | */ | |
7dab73b3 | 312 | if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags)) |
9f166171 | 313 | rt2x00crypto_tx_insert_iv(entry->skb, header_length); |
2bb057d0 | 314 | |
e039fa4a JB |
315 | /* |
316 | * Send frame to debugfs immediately, after this call is completed | |
317 | * we are going to overwrite the skb->cb array. | |
318 | */ | |
319 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb); | |
95ea3627 ID |
320 | |
321 | /* | |
2e27cff8 | 322 | * Determine if the frame has been successfully transmitted. |
95ea3627 | 323 | */ |
2e27cff8 | 324 | success = |
ce4c45e0 | 325 | test_bit(TXDONE_SUCCESS, &txdesc->flags) || |
fd6dcb88 | 326 | test_bit(TXDONE_UNKNOWN, &txdesc->flags); |
2e27cff8 ID |
327 | |
328 | /* | |
329 | * Update TX statistics. | |
330 | */ | |
331 | rt2x00dev->link.qual.tx_success += success; | |
332 | rt2x00dev->link.qual.tx_failed += !success; | |
95ea3627 | 333 | |
e6a9854b JB |
334 | rate_idx = skbdesc->tx_rate_idx; |
335 | rate_flags = skbdesc->tx_rate_flags; | |
92ed48e5 BP |
336 | retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ? |
337 | (txdesc->retry + 1) : 1; | |
e6a9854b | 338 | |
181d6902 ID |
339 | /* |
340 | * Initialize TX status | |
341 | */ | |
e039fa4a JB |
342 | memset(&tx_info->status, 0, sizeof(tx_info->status)); |
343 | tx_info->status.ack_signal = 0; | |
92ed48e5 BP |
344 | |
345 | /* | |
346 | * Frame was send with retries, hardware tried | |
347 | * different rates to send out the frame, at each | |
3d2bc103 HS |
348 | * retry it lowered the rate 1 step except when the |
349 | * lowest rate was used. | |
92ed48e5 BP |
350 | */ |
351 | for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) { | |
352 | tx_info->status.rates[i].idx = rate_idx - i; | |
353 | tx_info->status.rates[i].flags = rate_flags; | |
3d2bc103 HS |
354 | |
355 | if (rate_idx - i == 0) { | |
356 | /* | |
357 | * The lowest rate (index 0) was used until the | |
358 | * number of max retries was reached. | |
359 | */ | |
360 | tx_info->status.rates[i].count = retry_rates - i; | |
361 | i++; | |
362 | break; | |
363 | } | |
92ed48e5 BP |
364 | tx_info->status.rates[i].count = 1; |
365 | } | |
2e27cff8 | 366 | if (i < (IEEE80211_TX_MAX_RATES - 1)) |
92ed48e5 | 367 | tx_info->status.rates[i].idx = -1; /* terminate */ |
181d6902 | 368 | |
e039fa4a | 369 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) { |
2e27cff8 | 370 | if (success) |
e039fa4a | 371 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
2e27cff8 | 372 | else |
181d6902 | 373 | rt2x00dev->low_level_stats.dot11ACKFailureCount++; |
95ea3627 ID |
374 | } |
375 | ||
1df90809 HS |
376 | /* |
377 | * Every single frame has it's own tx status, hence report | |
378 | * every frame as ampdu of size 1. | |
379 | * | |
380 | * TODO: if we can find out how many frames were aggregated | |
381 | * by the hw we could provide the real ampdu_len to mac80211 | |
382 | * which would allow the rc algorithm to better decide on | |
383 | * which rates are suitable. | |
384 | */ | |
f16d2db7 HS |
385 | if (test_bit(TXDONE_AMPDU, &txdesc->flags) || |
386 | tx_info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1df90809 HS |
387 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
388 | tx_info->status.ampdu_len = 1; | |
389 | tx_info->status.ampdu_ack_len = success ? 1 : 0; | |
f16d2db7 HS |
390 | |
391 | if (!success) | |
392 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
1df90809 HS |
393 | } |
394 | ||
e6a9854b | 395 | if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
2e27cff8 | 396 | if (success) |
181d6902 | 397 | rt2x00dev->low_level_stats.dot11RTSSuccessCount++; |
2e27cff8 | 398 | else |
181d6902 | 399 | rt2x00dev->low_level_stats.dot11RTSFailureCount++; |
95ea3627 ID |
400 | } |
401 | ||
402 | /* | |
7351c6bd JB |
403 | * Only send the status report to mac80211 when it's a frame |
404 | * that originated in mac80211. If this was a extra frame coming | |
405 | * through a mac80211 library call (RTS/CTS) then we should not | |
406 | * send the status report back. | |
95ea3627 | 407 | */ |
20ed3166 | 408 | if (!(skbdesc_flags & SKBDESC_NOT_MAC80211)) { |
7dab73b3 | 409 | if (test_bit(REQUIRE_TASKLET_CONTEXT, &rt2x00dev->cap_flags)) |
20ed3166 JS |
410 | ieee80211_tx_status(rt2x00dev->hw, entry->skb); |
411 | else | |
412 | ieee80211_tx_status_ni(rt2x00dev->hw, entry->skb); | |
413 | } else | |
78e256c9 | 414 | dev_kfree_skb_any(entry->skb); |
d74f5ba4 ID |
415 | |
416 | /* | |
417 | * Make this entry available for reuse. | |
418 | */ | |
95ea3627 | 419 | entry->skb = NULL; |
d74f5ba4 ID |
420 | entry->flags = 0; |
421 | ||
798b7adb | 422 | rt2x00dev->ops->lib->clear_entry(entry); |
d74f5ba4 | 423 | |
75256f03 | 424 | rt2x00queue_index_inc(entry, Q_INDEX_DONE); |
d74f5ba4 ID |
425 | |
426 | /* | |
427 | * If the data queue was below the threshold before the txdone | |
428 | * handler we must make sure the packet queue in the mac80211 stack | |
429 | * is reenabled when the txdone handler has finished. | |
430 | */ | |
431 | if (!rt2x00queue_threshold(entry->queue)) | |
0b7fde54 | 432 | rt2x00queue_unpause_queue(entry->queue); |
95ea3627 ID |
433 | } |
434 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone); | |
3392bece ID |
435 | |
436 | void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status) | |
437 | { | |
438 | struct txdone_entry_desc txdesc; | |
439 | ||
440 | txdesc.flags = 0; | |
441 | __set_bit(status, &txdesc.flags); | |
442 | txdesc.retry = 0; | |
443 | ||
444 | rt2x00lib_txdone(entry, &txdesc); | |
445 | } | |
446 | EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo); | |
95ea3627 | 447 | |
1c0bcf89 ID |
448 | static u8 *rt2x00lib_find_ie(u8 *data, unsigned int len, u8 ie) |
449 | { | |
450 | struct ieee80211_mgmt *mgmt = (void *)data; | |
451 | u8 *pos, *end; | |
452 | ||
453 | pos = (u8 *)mgmt->u.beacon.variable; | |
454 | end = data + len; | |
455 | while (pos < end) { | |
456 | if (pos + 2 + pos[1] > end) | |
457 | return NULL; | |
458 | ||
459 | if (pos[0] == ie) | |
460 | return pos; | |
461 | ||
462 | pos += 2 + pos[1]; | |
463 | } | |
464 | ||
465 | return NULL; | |
466 | } | |
467 | ||
468 | static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev *rt2x00dev, | |
469 | struct sk_buff *skb, | |
470 | struct rxdone_entry_desc *rxdesc) | |
471 | { | |
472 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
473 | struct ieee80211_tim_ie *tim_ie; | |
474 | u8 *tim; | |
475 | u8 tim_len; | |
476 | bool cam; | |
477 | ||
478 | /* If this is not a beacon, or if mac80211 has no powersaving | |
479 | * configured, or if the device is already in powersaving mode | |
480 | * we can exit now. */ | |
481 | if (likely(!ieee80211_is_beacon(hdr->frame_control) || | |
482 | !(rt2x00dev->hw->conf.flags & IEEE80211_CONF_PS))) | |
483 | return; | |
484 | ||
485 | /* min. beacon length + FCS_LEN */ | |
486 | if (skb->len <= 40 + FCS_LEN) | |
487 | return; | |
488 | ||
489 | /* and only beacons from the associated BSSID, please */ | |
490 | if (!(rxdesc->dev_flags & RXDONE_MY_BSS) || | |
491 | !rt2x00dev->aid) | |
492 | return; | |
493 | ||
494 | rt2x00dev->last_beacon = jiffies; | |
495 | ||
496 | tim = rt2x00lib_find_ie(skb->data, skb->len - FCS_LEN, WLAN_EID_TIM); | |
497 | if (!tim) | |
498 | return; | |
499 | ||
500 | if (tim[1] < sizeof(*tim_ie)) | |
501 | return; | |
502 | ||
503 | tim_len = tim[1]; | |
504 | tim_ie = (struct ieee80211_tim_ie *) &tim[2]; | |
505 | ||
506 | /* Check whenever the PHY can be turned off again. */ | |
507 | ||
508 | /* 1. What about buffered unicast traffic for our AID? */ | |
509 | cam = ieee80211_check_tim(tim_ie, tim_len, rt2x00dev->aid); | |
510 | ||
511 | /* 2. Maybe the AP wants to send multicast/broadcast data? */ | |
512 | cam |= (tim_ie->bitmap_ctrl & 0x01); | |
513 | ||
514 | if (!cam && !test_bit(CONFIG_POWERSAVING, &rt2x00dev->flags)) | |
515 | rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, | |
516 | IEEE80211_CONF_CHANGE_PS); | |
517 | } | |
518 | ||
35f00cfc ID |
519 | static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev, |
520 | struct rxdone_entry_desc *rxdesc) | |
521 | { | |
522 | struct ieee80211_supported_band *sband; | |
523 | const struct rt2x00_rate *rate; | |
524 | unsigned int i; | |
3590eea4 ID |
525 | int signal = rxdesc->signal; |
526 | int type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK); | |
527 | ||
528 | switch (rxdesc->rate_mode) { | |
529 | case RATE_MODE_CCK: | |
530 | case RATE_MODE_OFDM: | |
531 | /* | |
532 | * For non-HT rates the MCS value needs to contain the | |
533 | * actually used rate modulation (CCK or OFDM). | |
534 | */ | |
535 | if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS) | |
536 | signal = RATE_MCS(rxdesc->rate_mode, signal); | |
537 | ||
538 | sband = &rt2x00dev->bands[rt2x00dev->curr_band]; | |
539 | for (i = 0; i < sband->n_bitrates; i++) { | |
540 | rate = rt2x00_get_rate(sband->bitrates[i].hw_value); | |
541 | if (((type == RXDONE_SIGNAL_PLCP) && | |
542 | (rate->plcp == signal)) || | |
543 | ((type == RXDONE_SIGNAL_BITRATE) && | |
544 | (rate->bitrate == signal)) || | |
545 | ((type == RXDONE_SIGNAL_MCS) && | |
546 | (rate->mcs == signal))) { | |
547 | return i; | |
548 | } | |
35f00cfc | 549 | } |
3590eea4 ID |
550 | break; |
551 | case RATE_MODE_HT_MIX: | |
552 | case RATE_MODE_HT_GREENFIELD: | |
553 | if (signal >= 0 && signal <= 76) | |
554 | return signal; | |
555 | break; | |
556 | default: | |
557 | break; | |
35f00cfc ID |
558 | } |
559 | ||
560 | WARNING(rt2x00dev, "Frame received with unrecognized signal, " | |
3590eea4 ID |
561 | "mode=0x%.4x, signal=0x%.4x, type=%d.\n", |
562 | rxdesc->rate_mode, signal, type); | |
35f00cfc ID |
563 | return 0; |
564 | } | |
565 | ||
fa69560f | 566 | void rt2x00lib_rxdone(struct queue_entry *entry) |
95ea3627 | 567 | { |
fa69560f | 568 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c4da0048 GW |
569 | struct rxdone_entry_desc rxdesc; |
570 | struct sk_buff *skb; | |
e5ef5bad | 571 | struct ieee80211_rx_status *rx_status; |
2bb057d0 | 572 | unsigned int header_length; |
35f00cfc | 573 | int rate_idx; |
7e613e16 | 574 | |
070192dd ID |
575 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) || |
576 | !test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) | |
577 | goto submit_entry; | |
578 | ||
7e613e16 ID |
579 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
580 | goto submit_entry; | |
581 | ||
c4da0048 GW |
582 | /* |
583 | * Allocate a new sk_buffer. If no new buffer available, drop the | |
584 | * received frame and reuse the existing buffer. | |
585 | */ | |
fa69560f | 586 | skb = rt2x00queue_alloc_rxskb(entry); |
c4da0048 | 587 | if (!skb) |
1550c8ef | 588 | goto submit_entry; |
c4da0048 GW |
589 | |
590 | /* | |
591 | * Unmap the skb. | |
592 | */ | |
fa69560f | 593 | rt2x00queue_unmap_skb(entry); |
c4da0048 GW |
594 | |
595 | /* | |
596 | * Extract the RXD details. | |
597 | */ | |
598 | memset(&rxdesc, 0, sizeof(rxdesc)); | |
599 | rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); | |
95ea3627 | 600 | |
7f503fc4 SG |
601 | /* |
602 | * Check for valid size in case we get corrupted descriptor from | |
603 | * hardware. | |
604 | */ | |
605 | if (unlikely(rxdesc.size == 0 || | |
606 | rxdesc.size > entry->queue->data_size)) { | |
607 | WARNING(rt2x00dev, "Wrong frame size %d max %d.\n", | |
608 | rxdesc.size, entry->queue->data_size); | |
609 | dev_kfree_skb(entry->skb); | |
610 | goto renew_skb; | |
611 | } | |
612 | ||
239c249d GW |
613 | /* |
614 | * The data behind the ieee80211 header must be | |
a9f853dd | 615 | * aligned on a 4 byte boundary. |
239c249d | 616 | */ |
2bb057d0 | 617 | header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
239c249d | 618 | |
2bb057d0 ID |
619 | /* |
620 | * Hardware might have stripped the IV/EIV/ICV data, | |
621 | * in that case it is possible that the data was | |
3ad2f3fb | 622 | * provided separately (through hardware descriptor) |
2bb057d0 ID |
623 | * in which case we should reinsert the data into the frame. |
624 | */ | |
74415edb | 625 | if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) && |
9f166171 | 626 | (rxdesc.flags & RX_FLAG_IV_STRIPPED)) |
daee6c09 | 627 | rt2x00crypto_rx_insert_iv(entry->skb, header_length, |
9f166171 | 628 | &rxdesc); |
b7340833 GW |
629 | else if (header_length && |
630 | (rxdesc.size > header_length) && | |
631 | (rxdesc.dev_flags & RXDONE_L2PAD)) | |
daee6c09 | 632 | rt2x00queue_remove_l2pad(entry->skb, header_length); |
239c249d | 633 | |
1398d458 AB |
634 | /* Trim buffer to correct size */ |
635 | skb_trim(entry->skb, rxdesc.size); | |
636 | ||
95ea3627 | 637 | /* |
3590eea4 | 638 | * Translate the signal to the correct bitrate index. |
95ea3627 | 639 | */ |
3590eea4 ID |
640 | rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc); |
641 | if (rxdesc.rate_mode == RATE_MODE_HT_MIX || | |
642 | rxdesc.rate_mode == RATE_MODE_HT_GREENFIELD) | |
35f00cfc | 643 | rxdesc.flags |= RX_FLAG_HT; |
866a0503 | 644 | |
1c0bcf89 ID |
645 | /* |
646 | * Check if this is a beacon, and more frames have been | |
647 | * buffered while we were in powersaving mode. | |
648 | */ | |
649 | rt2x00lib_rxdone_check_ps(rt2x00dev, entry->skb, &rxdesc); | |
650 | ||
61af43c5 | 651 | /* |
84e3196f | 652 | * Update extra components |
61af43c5 | 653 | */ |
84e3196f ID |
654 | rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc); |
655 | rt2x00debug_update_crypto(rt2x00dev, &rxdesc); | |
e5ef5bad | 656 | rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); |
69f81a2c | 657 | |
e5ef5bad ID |
658 | /* |
659 | * Initialize RX status information, and send frame | |
660 | * to mac80211. | |
661 | */ | |
662 | rx_status = IEEE80211_SKB_RXCB(entry->skb); | |
ae73e58e | 663 | rx_status->mactime = rxdesc.timestamp; |
e5ef5bad ID |
664 | rx_status->band = rt2x00dev->curr_band; |
665 | rx_status->freq = rt2x00dev->curr_freq; | |
35f00cfc | 666 | rx_status->rate_idx = rate_idx; |
c4da0048 GW |
667 | rx_status->signal = rxdesc.rssi; |
668 | rx_status->flag = rxdesc.flags; | |
69f81a2c | 669 | rx_status->antenna = rt2x00dev->link.ant.active.rx; |
95ea3627 | 670 | |
7e613e16 | 671 | ieee80211_rx_ni(rt2x00dev->hw, entry->skb); |
c4da0048 | 672 | |
7f503fc4 | 673 | renew_skb: |
c4da0048 GW |
674 | /* |
675 | * Replace the skb with the freshly allocated one. | |
676 | */ | |
677 | entry->skb = skb; | |
d74f5ba4 | 678 | |
7e613e16 | 679 | submit_entry: |
070192dd | 680 | entry->flags = 0; |
75256f03 | 681 | rt2x00queue_index_inc(entry, Q_INDEX_DONE); |
070192dd | 682 | if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && |
64e7d723 | 683 | test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) |
070192dd | 684 | rt2x00dev->ops->lib->clear_entry(entry); |
95ea3627 ID |
685 | } |
686 | EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); | |
687 | ||
95ea3627 ID |
688 | /* |
689 | * Driver initialization handlers. | |
690 | */ | |
70e2fed4 ID |
691 | const struct rt2x00_rate rt2x00_supported_rates[12] = { |
692 | { | |
3d8606a6 | 693 | .flags = DEV_RATE_CCK, |
70e2fed4 | 694 | .bitrate = 10, |
aa776721 | 695 | .ratemask = BIT(0), |
70e2fed4 | 696 | .plcp = 0x00, |
35f00cfc | 697 | .mcs = RATE_MCS(RATE_MODE_CCK, 0), |
70e2fed4 ID |
698 | }, |
699 | { | |
3d8606a6 | 700 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 701 | .bitrate = 20, |
aa776721 | 702 | .ratemask = BIT(1), |
70e2fed4 | 703 | .plcp = 0x01, |
35f00cfc | 704 | .mcs = RATE_MCS(RATE_MODE_CCK, 1), |
70e2fed4 ID |
705 | }, |
706 | { | |
3d8606a6 | 707 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 708 | .bitrate = 55, |
aa776721 | 709 | .ratemask = BIT(2), |
70e2fed4 | 710 | .plcp = 0x02, |
35f00cfc | 711 | .mcs = RATE_MCS(RATE_MODE_CCK, 2), |
70e2fed4 ID |
712 | }, |
713 | { | |
3d8606a6 | 714 | .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, |
70e2fed4 | 715 | .bitrate = 110, |
aa776721 | 716 | .ratemask = BIT(3), |
70e2fed4 | 717 | .plcp = 0x03, |
35f00cfc | 718 | .mcs = RATE_MCS(RATE_MODE_CCK, 3), |
70e2fed4 ID |
719 | }, |
720 | { | |
3d8606a6 | 721 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 722 | .bitrate = 60, |
aa776721 | 723 | .ratemask = BIT(4), |
70e2fed4 | 724 | .plcp = 0x0b, |
35f00cfc | 725 | .mcs = RATE_MCS(RATE_MODE_OFDM, 0), |
70e2fed4 ID |
726 | }, |
727 | { | |
728 | .flags = DEV_RATE_OFDM, | |
729 | .bitrate = 90, | |
aa776721 | 730 | .ratemask = BIT(5), |
70e2fed4 | 731 | .plcp = 0x0f, |
35f00cfc | 732 | .mcs = RATE_MCS(RATE_MODE_OFDM, 1), |
70e2fed4 ID |
733 | }, |
734 | { | |
3d8606a6 | 735 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 736 | .bitrate = 120, |
aa776721 | 737 | .ratemask = BIT(6), |
70e2fed4 | 738 | .plcp = 0x0a, |
35f00cfc | 739 | .mcs = RATE_MCS(RATE_MODE_OFDM, 2), |
70e2fed4 ID |
740 | }, |
741 | { | |
742 | .flags = DEV_RATE_OFDM, | |
743 | .bitrate = 180, | |
aa776721 | 744 | .ratemask = BIT(7), |
70e2fed4 | 745 | .plcp = 0x0e, |
35f00cfc | 746 | .mcs = RATE_MCS(RATE_MODE_OFDM, 3), |
70e2fed4 ID |
747 | }, |
748 | { | |
3d8606a6 | 749 | .flags = DEV_RATE_OFDM, |
70e2fed4 | 750 | .bitrate = 240, |
aa776721 | 751 | .ratemask = BIT(8), |
70e2fed4 | 752 | .plcp = 0x09, |
35f00cfc | 753 | .mcs = RATE_MCS(RATE_MODE_OFDM, 4), |
70e2fed4 ID |
754 | }, |
755 | { | |
756 | .flags = DEV_RATE_OFDM, | |
757 | .bitrate = 360, | |
aa776721 | 758 | .ratemask = BIT(9), |
70e2fed4 | 759 | .plcp = 0x0d, |
35f00cfc | 760 | .mcs = RATE_MCS(RATE_MODE_OFDM, 5), |
70e2fed4 ID |
761 | }, |
762 | { | |
763 | .flags = DEV_RATE_OFDM, | |
764 | .bitrate = 480, | |
aa776721 | 765 | .ratemask = BIT(10), |
70e2fed4 | 766 | .plcp = 0x08, |
35f00cfc | 767 | .mcs = RATE_MCS(RATE_MODE_OFDM, 6), |
70e2fed4 ID |
768 | }, |
769 | { | |
770 | .flags = DEV_RATE_OFDM, | |
771 | .bitrate = 540, | |
aa776721 | 772 | .ratemask = BIT(11), |
70e2fed4 | 773 | .plcp = 0x0c, |
35f00cfc | 774 | .mcs = RATE_MCS(RATE_MODE_OFDM, 7), |
70e2fed4 ID |
775 | }, |
776 | }; | |
777 | ||
95ea3627 ID |
778 | static void rt2x00lib_channel(struct ieee80211_channel *entry, |
779 | const int channel, const int tx_power, | |
780 | const int value) | |
781 | { | |
59eb21a6 BR |
782 | /* XXX: this assumption about the band is wrong for 802.11j */ |
783 | entry->band = channel <= 14 ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
784 | entry->center_freq = ieee80211_channel_to_frequency(channel, | |
785 | entry->band); | |
8318d78a JB |
786 | entry->hw_value = value; |
787 | entry->max_power = tx_power; | |
788 | entry->max_antenna_gain = 0xff; | |
95ea3627 ID |
789 | } |
790 | ||
791 | static void rt2x00lib_rate(struct ieee80211_rate *entry, | |
70e2fed4 | 792 | const u16 index, const struct rt2x00_rate *rate) |
95ea3627 | 793 | { |
70e2fed4 ID |
794 | entry->flags = 0; |
795 | entry->bitrate = rate->bitrate; | |
c2361bae | 796 | entry->hw_value = index; |
3ea96463 | 797 | entry->hw_value_short = index; |
70e2fed4 | 798 | |
3ea96463 | 799 | if (rate->flags & DEV_RATE_SHORT_PREAMBLE) |
70e2fed4 | 800 | entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE; |
95ea3627 ID |
801 | } |
802 | ||
803 | static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, | |
804 | struct hw_mode_spec *spec) | |
805 | { | |
806 | struct ieee80211_hw *hw = rt2x00dev->hw; | |
95ea3627 ID |
807 | struct ieee80211_channel *channels; |
808 | struct ieee80211_rate *rates; | |
31562e80 | 809 | unsigned int num_rates; |
95ea3627 | 810 | unsigned int i; |
95ea3627 | 811 | |
31562e80 ID |
812 | num_rates = 0; |
813 | if (spec->supported_rates & SUPPORT_RATE_CCK) | |
814 | num_rates += 4; | |
815 | if (spec->supported_rates & SUPPORT_RATE_OFDM) | |
816 | num_rates += 8; | |
95ea3627 ID |
817 | |
818 | channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); | |
819 | if (!channels) | |
8318d78a | 820 | return -ENOMEM; |
95ea3627 | 821 | |
31562e80 | 822 | rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL); |
95ea3627 ID |
823 | if (!rates) |
824 | goto exit_free_channels; | |
825 | ||
826 | /* | |
827 | * Initialize Rate list. | |
828 | */ | |
31562e80 | 829 | for (i = 0; i < num_rates; i++) |
8f5fa7f0 | 830 | rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i)); |
95ea3627 ID |
831 | |
832 | /* | |
833 | * Initialize Channel list. | |
834 | */ | |
835 | for (i = 0; i < spec->num_channels; i++) { | |
95ea3627 | 836 | rt2x00lib_channel(&channels[i], |
8c5e7a5f | 837 | spec->channels[i].channel, |
8d1331b3 | 838 | spec->channels_info[i].max_power, i); |
95ea3627 ID |
839 | } |
840 | ||
841 | /* | |
31562e80 | 842 | * Intitialize 802.11b, 802.11g |
95ea3627 | 843 | * Rates: CCK, OFDM. |
8318d78a | 844 | * Channels: 2.4 GHz |
95ea3627 | 845 | */ |
47ac2683 | 846 | if (spec->supported_bands & SUPPORT_BAND_2GHZ) { |
31562e80 ID |
847 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14; |
848 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates; | |
849 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels; | |
850 | rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; | |
851 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
852 | &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; | |
35f00cfc ID |
853 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap, |
854 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
855 | } |
856 | ||
857 | /* | |
858 | * Intitialize 802.11a | |
859 | * Rates: OFDM. | |
860 | * Channels: OFDM, UNII, HiperLAN2. | |
861 | */ | |
47ac2683 | 862 | if (spec->supported_bands & SUPPORT_BAND_5GHZ) { |
31562e80 ID |
863 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels = |
864 | spec->num_channels - 14; | |
865 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates = | |
866 | num_rates - 4; | |
867 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14]; | |
868 | rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; | |
869 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
870 | &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; | |
35f00cfc ID |
871 | memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap, |
872 | &spec->ht, sizeof(spec->ht)); | |
95ea3627 ID |
873 | } |
874 | ||
95ea3627 ID |
875 | return 0; |
876 | ||
8318d78a | 877 | exit_free_channels: |
95ea3627 | 878 | kfree(channels); |
95ea3627 ID |
879 | ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); |
880 | return -ENOMEM; | |
881 | } | |
882 | ||
883 | static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) | |
884 | { | |
0262ab0d | 885 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
95ea3627 ID |
886 | ieee80211_unregister_hw(rt2x00dev->hw); |
887 | ||
8318d78a JB |
888 | if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) { |
889 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels); | |
890 | kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates); | |
891 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL; | |
892 | rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL; | |
95ea3627 | 893 | } |
8c5e7a5f ID |
894 | |
895 | kfree(rt2x00dev->spec.channels_info); | |
95ea3627 ID |
896 | } |
897 | ||
898 | static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) | |
899 | { | |
900 | struct hw_mode_spec *spec = &rt2x00dev->spec; | |
901 | int status; | |
902 | ||
0262ab0d ID |
903 | if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags)) |
904 | return 0; | |
905 | ||
95ea3627 ID |
906 | /* |
907 | * Initialize HW modes. | |
908 | */ | |
909 | status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); | |
910 | if (status) | |
911 | return status; | |
912 | ||
61448f88 GW |
913 | /* |
914 | * Initialize HW fields. | |
915 | */ | |
916 | rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues; | |
917 | ||
e6218cc4 GW |
918 | /* |
919 | * Initialize extra TX headroom required. | |
920 | */ | |
7a4a77b7 GW |
921 | rt2x00dev->hw->extra_tx_headroom = |
922 | max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM, | |
923 | rt2x00dev->ops->extra_tx_headroom); | |
924 | ||
925 | /* | |
926 | * Take TX headroom required for alignment into account. | |
927 | */ | |
7dab73b3 | 928 | if (test_bit(REQUIRE_L2PAD, &rt2x00dev->cap_flags)) |
7a4a77b7 | 929 | rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE; |
7dab73b3 | 930 | else if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) |
7a4a77b7 | 931 | rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE; |
e6218cc4 | 932 | |
96c3da7d HS |
933 | /* |
934 | * Allocate tx status FIFO for driver use. | |
935 | */ | |
7dab73b3 | 936 | if (test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags)) { |
96c3da7d | 937 | /* |
f78987cf HS |
938 | * Allocate the txstatus fifo. In the worst case the tx |
939 | * status fifo has to hold the tx status of all entries | |
940 | * in all tx queues. Hence, calculate the kfifo size as | |
941 | * tx_queues * entry_num and round up to the nearest | |
942 | * power of 2. | |
96c3da7d | 943 | */ |
f78987cf HS |
944 | int kfifo_size = |
945 | roundup_pow_of_two(rt2x00dev->ops->tx_queues * | |
946 | rt2x00dev->ops->tx->entry_num * | |
947 | sizeof(u32)); | |
948 | ||
949 | status = kfifo_alloc(&rt2x00dev->txstatus_fifo, kfifo_size, | |
96c3da7d HS |
950 | GFP_KERNEL); |
951 | if (status) | |
952 | return status; | |
96c3da7d HS |
953 | } |
954 | ||
c5c65761 HS |
955 | /* |
956 | * Initialize tasklets if used by the driver. Tasklets are | |
957 | * disabled until the interrupts are turned on. The driver | |
958 | * has to handle that. | |
959 | */ | |
960 | #define RT2X00_TASKLET_INIT(taskletname) \ | |
961 | if (rt2x00dev->ops->lib->taskletname) { \ | |
962 | tasklet_init(&rt2x00dev->taskletname, \ | |
963 | rt2x00dev->ops->lib->taskletname, \ | |
964 | (unsigned long)rt2x00dev); \ | |
c5c65761 HS |
965 | } |
966 | ||
c8e15a1e | 967 | RT2X00_TASKLET_INIT(txstatus_tasklet); |
c5c65761 HS |
968 | RT2X00_TASKLET_INIT(pretbtt_tasklet); |
969 | RT2X00_TASKLET_INIT(tbtt_tasklet); | |
970 | RT2X00_TASKLET_INIT(rxdone_tasklet); | |
971 | RT2X00_TASKLET_INIT(autowake_tasklet); | |
972 | ||
973 | #undef RT2X00_TASKLET_INIT | |
974 | ||
95ea3627 ID |
975 | /* |
976 | * Register HW. | |
977 | */ | |
978 | status = ieee80211_register_hw(rt2x00dev->hw); | |
f05faa31 | 979 | if (status) |
95ea3627 | 980 | return status; |
95ea3627 | 981 | |
0262ab0d | 982 | set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags); |
95ea3627 ID |
983 | |
984 | return 0; | |
985 | } | |
986 | ||
987 | /* | |
988 | * Initialization/uninitialization handlers. | |
989 | */ | |
e37ea213 | 990 | static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 | 991 | { |
0262ab0d | 992 | if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
993 | return; |
994 | ||
995 | /* | |
1682fe6d | 996 | * Unregister extra components. |
95ea3627 ID |
997 | */ |
998 | rt2x00rfkill_unregister(rt2x00dev); | |
999 | ||
1000 | /* | |
1001 | * Allow the HW to uninitialize. | |
1002 | */ | |
1003 | rt2x00dev->ops->lib->uninitialize(rt2x00dev); | |
1004 | ||
1005 | /* | |
181d6902 | 1006 | * Free allocated queue entries. |
95ea3627 | 1007 | */ |
181d6902 | 1008 | rt2x00queue_uninitialize(rt2x00dev); |
95ea3627 ID |
1009 | } |
1010 | ||
e37ea213 | 1011 | static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) |
95ea3627 ID |
1012 | { |
1013 | int status; | |
1014 | ||
0262ab0d | 1015 | if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags)) |
95ea3627 ID |
1016 | return 0; |
1017 | ||
1018 | /* | |
181d6902 | 1019 | * Allocate all queue entries. |
95ea3627 | 1020 | */ |
181d6902 ID |
1021 | status = rt2x00queue_initialize(rt2x00dev); |
1022 | if (status) | |
95ea3627 | 1023 | return status; |
95ea3627 ID |
1024 | |
1025 | /* | |
1026 | * Initialize the device. | |
1027 | */ | |
1028 | status = rt2x00dev->ops->lib->initialize(rt2x00dev); | |
ed499983 ID |
1029 | if (status) { |
1030 | rt2x00queue_uninitialize(rt2x00dev); | |
1031 | return status; | |
1032 | } | |
95ea3627 | 1033 | |
0262ab0d | 1034 | set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags); |
95ea3627 ID |
1035 | |
1036 | /* | |
1682fe6d | 1037 | * Register the extra components. |
95ea3627 | 1038 | */ |
1682fe6d | 1039 | rt2x00rfkill_register(rt2x00dev); |
95ea3627 ID |
1040 | |
1041 | return 0; | |
95ea3627 ID |
1042 | } |
1043 | ||
e37ea213 ID |
1044 | int rt2x00lib_start(struct rt2x00_dev *rt2x00dev) |
1045 | { | |
1046 | int retval; | |
1047 | ||
0262ab0d | 1048 | if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
1049 | return 0; |
1050 | ||
1051 | /* | |
1052 | * If this is the first interface which is added, | |
1053 | * we should load the firmware now. | |
1054 | */ | |
9404ef34 ID |
1055 | retval = rt2x00lib_load_firmware(rt2x00dev); |
1056 | if (retval) | |
1057 | return retval; | |
e37ea213 ID |
1058 | |
1059 | /* | |
1060 | * Initialize the device. | |
1061 | */ | |
1062 | retval = rt2x00lib_initialize(rt2x00dev); | |
1063 | if (retval) | |
1064 | return retval; | |
1065 | ||
6bb40dd1 ID |
1066 | rt2x00dev->intf_ap_count = 0; |
1067 | rt2x00dev->intf_sta_count = 0; | |
1068 | rt2x00dev->intf_associated = 0; | |
1069 | ||
bdfa500b ID |
1070 | /* Enable the radio */ |
1071 | retval = rt2x00lib_enable_radio(rt2x00dev); | |
1f0280cb | 1072 | if (retval) |
bdfa500b | 1073 | return retval; |
bdfa500b | 1074 | |
0262ab0d | 1075 | set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags); |
e37ea213 ID |
1076 | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev) | |
1081 | { | |
0262ab0d | 1082 | if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags)) |
e37ea213 ID |
1083 | return; |
1084 | ||
1085 | /* | |
1086 | * Perhaps we can add something smarter here, | |
1087 | * but for now just disabling the radio should do. | |
1088 | */ | |
1089 | rt2x00lib_disable_radio(rt2x00dev); | |
1090 | ||
6bb40dd1 ID |
1091 | rt2x00dev->intf_ap_count = 0; |
1092 | rt2x00dev->intf_sta_count = 0; | |
1093 | rt2x00dev->intf_associated = 0; | |
e37ea213 ID |
1094 | } |
1095 | ||
95ea3627 ID |
1096 | /* |
1097 | * driver allocation handlers. | |
1098 | */ | |
95ea3627 ID |
1099 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) |
1100 | { | |
1101 | int retval = -ENOMEM; | |
1102 | ||
c5c65761 | 1103 | spin_lock_init(&rt2x00dev->irqmask_lock); |
8ff48a8b ID |
1104 | mutex_init(&rt2x00dev->csr_mutex); |
1105 | ||
66f84d65 SC |
1106 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
1107 | ||
6bb40dd1 ID |
1108 | /* |
1109 | * Make room for rt2x00_intf inside the per-interface | |
1110 | * structure ieee80211_vif. | |
1111 | */ | |
1112 | rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf); | |
1113 | ||
3514a441 ID |
1114 | /* |
1115 | * Determine which operating modes are supported, all modes | |
1116 | * which require beaconing, depend on the availability of | |
1117 | * beacon entries. | |
1118 | */ | |
1119 | rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION); | |
1120 | if (rt2x00dev->ops->bcn->entry_num > 0) | |
1121 | rt2x00dev->hw->wiphy->interface_modes |= | |
1122 | BIT(NL80211_IFTYPE_ADHOC) | | |
a07dbea2 | 1123 | BIT(NL80211_IFTYPE_AP) | |
ce292a64 ID |
1124 | BIT(NL80211_IFTYPE_MESH_POINT) | |
1125 | BIT(NL80211_IFTYPE_WDS); | |
f59ac048 | 1126 | |
9acd56d3 | 1127 | /* |
0439f536 | 1128 | * Initialize work. |
9acd56d3 | 1129 | */ |
0439f536 ID |
1130 | rt2x00dev->workqueue = |
1131 | alloc_ordered_workqueue(wiphy_name(rt2x00dev->hw->wiphy), 0); | |
1132 | if (!rt2x00dev->workqueue) { | |
1133 | retval = -ENOMEM; | |
1134 | goto exit; | |
1135 | } | |
1136 | ||
9acd56d3 | 1137 | INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled); |
1c0bcf89 | 1138 | INIT_DELAYED_WORK(&rt2x00dev->autowakeup_work, rt2x00lib_autowakeup); |
9acd56d3 | 1139 | |
95ea3627 ID |
1140 | /* |
1141 | * Let the driver probe the device to detect the capabilities. | |
1142 | */ | |
1143 | retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); | |
1144 | if (retval) { | |
1145 | ERROR(rt2x00dev, "Failed to allocate device.\n"); | |
1146 | goto exit; | |
1147 | } | |
1148 | ||
95ea3627 | 1149 | /* |
181d6902 | 1150 | * Allocate queue array. |
95ea3627 | 1151 | */ |
181d6902 | 1152 | retval = rt2x00queue_allocate(rt2x00dev); |
95ea3627 ID |
1153 | if (retval) |
1154 | goto exit; | |
1155 | ||
1156 | /* | |
1157 | * Initialize ieee80211 structure. | |
1158 | */ | |
1159 | retval = rt2x00lib_probe_hw(rt2x00dev); | |
1160 | if (retval) { | |
1161 | ERROR(rt2x00dev, "Failed to initialize hw.\n"); | |
1162 | goto exit; | |
1163 | } | |
1164 | ||
a9450b70 | 1165 | /* |
1682fe6d | 1166 | * Register extra components. |
a9450b70 | 1167 | */ |
84e3196f | 1168 | rt2x00link_register(rt2x00dev); |
a9450b70 | 1169 | rt2x00leds_register(rt2x00dev); |
95ea3627 ID |
1170 | rt2x00debug_register(rt2x00dev); |
1171 | ||
1172 | return 0; | |
1173 | ||
1174 | exit: | |
1175 | rt2x00lib_remove_dev(rt2x00dev); | |
1176 | ||
1177 | return retval; | |
1178 | } | |
1179 | EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); | |
1180 | ||
1181 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) | |
1182 | { | |
0262ab0d | 1183 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
066cb637 | 1184 | |
95ea3627 ID |
1185 | /* |
1186 | * Disable radio. | |
1187 | */ | |
1188 | rt2x00lib_disable_radio(rt2x00dev); | |
1189 | ||
d8cc8926 PR |
1190 | /* |
1191 | * Stop all work. | |
1192 | */ | |
d8cc8926 | 1193 | cancel_work_sync(&rt2x00dev->intf_work); |
3bb42a64 | 1194 | cancel_delayed_work_sync(&rt2x00dev->autowakeup_work); |
37f4ee0b | 1195 | if (rt2x00_is_usb(rt2x00dev)) { |
9a24af11 | 1196 | del_timer_sync(&rt2x00dev->txstatus_timer); |
37f4ee0b SG |
1197 | cancel_work_sync(&rt2x00dev->rxdone_work); |
1198 | cancel_work_sync(&rt2x00dev->txdone_work); | |
1199 | } | |
0439f536 | 1200 | destroy_workqueue(rt2x00dev->workqueue); |
d8cc8926 | 1201 | |
96c3da7d HS |
1202 | /* |
1203 | * Free the tx status fifo. | |
1204 | */ | |
1205 | kfifo_free(&rt2x00dev->txstatus_fifo); | |
1206 | ||
1207 | /* | |
1208 | * Kill the tx status tasklet. | |
1209 | */ | |
1210 | tasklet_kill(&rt2x00dev->txstatus_tasklet); | |
e1f4e808 ID |
1211 | tasklet_kill(&rt2x00dev->pretbtt_tasklet); |
1212 | tasklet_kill(&rt2x00dev->tbtt_tasklet); | |
1213 | tasklet_kill(&rt2x00dev->rxdone_tasklet); | |
1214 | tasklet_kill(&rt2x00dev->autowake_tasklet); | |
96c3da7d | 1215 | |
95ea3627 ID |
1216 | /* |
1217 | * Uninitialize device. | |
1218 | */ | |
1219 | rt2x00lib_uninitialize(rt2x00dev); | |
1220 | ||
1221 | /* | |
1682fe6d | 1222 | * Free extra components |
95ea3627 ID |
1223 | */ |
1224 | rt2x00debug_deregister(rt2x00dev); | |
a9450b70 ID |
1225 | rt2x00leds_unregister(rt2x00dev); |
1226 | ||
95ea3627 ID |
1227 | /* |
1228 | * Free ieee80211_hw memory. | |
1229 | */ | |
1230 | rt2x00lib_remove_hw(rt2x00dev); | |
1231 | ||
1232 | /* | |
1233 | * Free firmware image. | |
1234 | */ | |
1235 | rt2x00lib_free_firmware(rt2x00dev); | |
1236 | ||
1237 | /* | |
181d6902 | 1238 | * Free queue structures. |
95ea3627 | 1239 | */ |
181d6902 | 1240 | rt2x00queue_free(rt2x00dev); |
95ea3627 ID |
1241 | } |
1242 | EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); | |
1243 | ||
1244 | /* | |
1245 | * Device state handlers | |
1246 | */ | |
1247 | #ifdef CONFIG_PM | |
1248 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) | |
1249 | { | |
95ea3627 | 1250 | NOTICE(rt2x00dev, "Going to sleep.\n"); |
066cb637 ID |
1251 | |
1252 | /* | |
07126127 | 1253 | * Prevent mac80211 from accessing driver while suspended. |
066cb637 | 1254 | */ |
07126127 ID |
1255 | if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
1256 | return 0; | |
95ea3627 ID |
1257 | |
1258 | /* | |
07126127 | 1259 | * Cleanup as much as possible. |
95ea3627 | 1260 | */ |
95ea3627 | 1261 | rt2x00lib_uninitialize(rt2x00dev); |
1682fe6d ID |
1262 | |
1263 | /* | |
1264 | * Suspend/disable extra components. | |
1265 | */ | |
a9450b70 | 1266 | rt2x00leds_suspend(rt2x00dev); |
95ea3627 ID |
1267 | rt2x00debug_deregister(rt2x00dev); |
1268 | ||
1269 | /* | |
9896322a ID |
1270 | * Set device mode to sleep for power management, |
1271 | * on some hardware this call seems to consistently fail. | |
1272 | * From the specifications it is hard to tell why it fails, | |
1273 | * and if this is a "bad thing". | |
1274 | * Overall it is safe to just ignore the failure and | |
1275 | * continue suspending. The only downside is that the | |
1276 | * device will not be in optimal power save mode, but with | |
1277 | * the radio and the other components already disabled the | |
1278 | * device is as good as disabled. | |
95ea3627 | 1279 | */ |
07126127 | 1280 | if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP)) |
9896322a ID |
1281 | WARNING(rt2x00dev, "Device failed to enter sleep state, " |
1282 | "continue suspending.\n"); | |
95ea3627 ID |
1283 | |
1284 | return 0; | |
1285 | } | |
1286 | EXPORT_SYMBOL_GPL(rt2x00lib_suspend); | |
1287 | ||
1288 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) | |
1289 | { | |
95ea3627 | 1290 | NOTICE(rt2x00dev, "Waking up.\n"); |
95ea3627 ID |
1291 | |
1292 | /* | |
1682fe6d | 1293 | * Restore/enable extra components. |
95ea3627 ID |
1294 | */ |
1295 | rt2x00debug_register(rt2x00dev); | |
a9450b70 | 1296 | rt2x00leds_resume(rt2x00dev); |
95ea3627 | 1297 | |
e37ea213 ID |
1298 | /* |
1299 | * We are ready again to receive requests from mac80211. | |
1300 | */ | |
0262ab0d | 1301 | set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
e37ea213 | 1302 | |
95ea3627 | 1303 | return 0; |
95ea3627 ID |
1304 | } |
1305 | EXPORT_SYMBOL_GPL(rt2x00lib_resume); | |
1306 | #endif /* CONFIG_PM */ | |
1307 | ||
1308 | /* | |
1309 | * rt2x00lib module information. | |
1310 | */ | |
1311 | MODULE_AUTHOR(DRV_PROJECT); | |
1312 | MODULE_VERSION(DRV_VERSION); | |
1313 | MODULE_DESCRIPTION("rt2x00 library"); | |
1314 | MODULE_LICENSE("GPL"); |