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2a421b91 TW |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
1f447808 | 5 | * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. |
2a421b91 TW |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * 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 Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
19 | * USA | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
23 | * | |
24 | * Contact Information: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
2a421b91 TW |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
27 | *****************************************************************************/ | |
7e272fcf | 28 | #include <linux/types.h> |
2a421b91 | 29 | #include <linux/etherdevice.h> |
7e272fcf | 30 | #include <net/mac80211.h> |
2a421b91 TW |
31 | |
32 | #include "iwl-eeprom.h" | |
33 | #include "iwl-dev.h" | |
34 | #include "iwl-core.h" | |
35 | #include "iwl-sta.h" | |
36 | #include "iwl-io.h" | |
37 | #include "iwl-helpers.h" | |
38 | ||
39 | /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after | |
40 | * sending probe req. This should be set long enough to hear probe responses | |
41 | * from more than one AP. */ | |
fe905f1d TW |
42 | #define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ |
43 | #define IWL_ACTIVE_DWELL_TIME_52 (20) | |
44 | ||
45 | #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3) | |
46 | #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2) | |
2a421b91 | 47 | |
2a421b91 TW |
48 | /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. |
49 | * Must be set longer than active dwell time. | |
50 | * For the most reliable scan, set > AP beacon interval (typically 100msec). */ | |
51 | #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ | |
52 | #define IWL_PASSIVE_DWELL_TIME_52 (10) | |
53 | #define IWL_PASSIVE_DWELL_BASE (100) | |
54 | #define IWL_CHANNEL_TUNE_TIME 5 | |
55 | ||
fe905f1d TW |
56 | |
57 | ||
2a421b91 TW |
58 | /** |
59 | * iwl_scan_cancel - Cancel any currently executing HW scan | |
60 | * | |
61 | * NOTE: priv->mutex is not required before calling this function | |
62 | */ | |
63 | int iwl_scan_cancel(struct iwl_priv *priv) | |
64 | { | |
65 | if (!test_bit(STATUS_SCAN_HW, &priv->status)) { | |
66 | clear_bit(STATUS_SCANNING, &priv->status); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | if (test_bit(STATUS_SCANNING, &priv->status)) { | |
6708dc86 | 71 | if (!test_and_set_bit(STATUS_SCAN_ABORTING, &priv->status)) { |
e1623446 | 72 | IWL_DEBUG_SCAN(priv, "Queuing scan abort.\n"); |
2a421b91 TW |
73 | queue_work(priv->workqueue, &priv->abort_scan); |
74 | ||
75 | } else | |
e1623446 | 76 | IWL_DEBUG_SCAN(priv, "Scan abort already in progress.\n"); |
2a421b91 TW |
77 | |
78 | return test_bit(STATUS_SCANNING, &priv->status); | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | EXPORT_SYMBOL(iwl_scan_cancel); | |
84 | /** | |
85 | * iwl_scan_cancel_timeout - Cancel any currently executing HW scan | |
86 | * @ms: amount of time to wait (in milliseconds) for scan to abort | |
87 | * | |
88 | * NOTE: priv->mutex must be held before calling this function | |
89 | */ | |
90 | int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms) | |
91 | { | |
92 | unsigned long now = jiffies; | |
93 | int ret; | |
94 | ||
95 | ret = iwl_scan_cancel(priv); | |
96 | if (ret && ms) { | |
97 | mutex_unlock(&priv->mutex); | |
98 | while (!time_after(jiffies, now + msecs_to_jiffies(ms)) && | |
99 | test_bit(STATUS_SCANNING, &priv->status)) | |
100 | msleep(1); | |
101 | mutex_lock(&priv->mutex); | |
102 | ||
103 | return test_bit(STATUS_SCANNING, &priv->status); | |
104 | } | |
105 | ||
106 | return ret; | |
107 | } | |
108 | EXPORT_SYMBOL(iwl_scan_cancel_timeout); | |
109 | ||
4e05c234 | 110 | static int iwl_send_scan_abort(struct iwl_priv *priv) |
2a421b91 TW |
111 | { |
112 | int ret = 0; | |
2f301227 | 113 | struct iwl_rx_packet *pkt; |
2a421b91 TW |
114 | struct iwl_host_cmd cmd = { |
115 | .id = REPLY_SCAN_ABORT_CMD, | |
c2acea8e | 116 | .flags = CMD_WANT_SKB, |
2a421b91 TW |
117 | }; |
118 | ||
119 | /* If there isn't a scan actively going on in the hardware | |
120 | * then we are in between scan bands and not actually | |
121 | * actively scanning, so don't send the abort command */ | |
122 | if (!test_bit(STATUS_SCAN_HW, &priv->status)) { | |
123 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | ret = iwl_send_cmd_sync(priv, &cmd); | |
128 | if (ret) { | |
129 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); | |
130 | return ret; | |
131 | } | |
132 | ||
2f301227 ZY |
133 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
134 | if (pkt->u.status != CAN_ABORT_STATUS) { | |
2a421b91 TW |
135 | /* The scan abort will return 1 for success or |
136 | * 2 for "failure". A failure condition can be | |
137 | * due to simply not being in an active scan which | |
138 | * can occur if we send the scan abort before we | |
139 | * the microcode has notified us that a scan is | |
140 | * completed. */ | |
2f301227 | 141 | IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", pkt->u.status); |
2a421b91 TW |
142 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
143 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
144 | } | |
145 | ||
64a76b50 | 146 | iwl_free_pages(priv, cmd.reply_page); |
2a421b91 TW |
147 | |
148 | return ret; | |
149 | } | |
2a421b91 TW |
150 | |
151 | /* Service response to REPLY_SCAN_CMD (0x80) */ | |
152 | static void iwl_rx_reply_scan(struct iwl_priv *priv, | |
153 | struct iwl_rx_mem_buffer *rxb) | |
154 | { | |
155 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 156 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
157 | struct iwl_scanreq_notification *notif = |
158 | (struct iwl_scanreq_notification *)pkt->u.raw; | |
159 | ||
e1623446 | 160 | IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status); |
2a421b91 TW |
161 | #endif |
162 | } | |
163 | ||
164 | /* Service SCAN_START_NOTIFICATION (0x82) */ | |
165 | static void iwl_rx_scan_start_notif(struct iwl_priv *priv, | |
166 | struct iwl_rx_mem_buffer *rxb) | |
167 | { | |
2f301227 | 168 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
169 | struct iwl_scanstart_notification *notif = |
170 | (struct iwl_scanstart_notification *)pkt->u.raw; | |
171 | priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); | |
e1623446 | 172 | IWL_DEBUG_SCAN(priv, "Scan start: " |
2a421b91 TW |
173 | "%d [802.11%s] " |
174 | "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", | |
175 | notif->channel, | |
176 | notif->band ? "bg" : "a", | |
fe905f1d TW |
177 | le32_to_cpu(notif->tsf_high), |
178 | le32_to_cpu(notif->tsf_low), | |
179 | notif->status, notif->beacon_timer); | |
2a421b91 TW |
180 | } |
181 | ||
182 | /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ | |
183 | static void iwl_rx_scan_results_notif(struct iwl_priv *priv, | |
184 | struct iwl_rx_mem_buffer *rxb) | |
185 | { | |
186 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 187 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
188 | struct iwl_scanresults_notification *notif = |
189 | (struct iwl_scanresults_notification *)pkt->u.raw; | |
190 | ||
e1623446 | 191 | IWL_DEBUG_SCAN(priv, "Scan ch.res: " |
2a421b91 TW |
192 | "%d [802.11%s] " |
193 | "(TSF: 0x%08X:%08X) - %d " | |
220575f7 | 194 | "elapsed=%lu usec\n", |
2a421b91 TW |
195 | notif->channel, |
196 | notif->band ? "bg" : "a", | |
197 | le32_to_cpu(notif->tsf_high), | |
198 | le32_to_cpu(notif->tsf_low), | |
199 | le32_to_cpu(notif->statistics[0]), | |
220575f7 | 200 | le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf); |
2a421b91 | 201 | #endif |
2a421b91 TW |
202 | } |
203 | ||
204 | /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ | |
205 | static void iwl_rx_scan_complete_notif(struct iwl_priv *priv, | |
206 | struct iwl_rx_mem_buffer *rxb) | |
207 | { | |
cb9289cb | 208 | #ifdef CONFIG_IWLWIFI_DEBUG |
2f301227 | 209 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
210 | struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw; |
211 | ||
e1623446 | 212 | IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", |
2a421b91 TW |
213 | scan_notif->scanned_channels, |
214 | scan_notif->tsf_low, | |
215 | scan_notif->tsf_high, scan_notif->status); | |
cb9289cb | 216 | #endif |
2a421b91 TW |
217 | |
218 | /* The HW is no longer scanning */ | |
219 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
220 | ||
b165cf09 | 221 | IWL_DEBUG_INFO(priv, "Scan on %sGHz took %dms\n", |
00700ee0 | 222 | (priv->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2", |
2a421b91 | 223 | jiffies_to_msecs(elapsed_jiffies |
b165cf09 | 224 | (priv->scan_start, jiffies))); |
2a421b91 | 225 | |
6708dc86 JB |
226 | /* |
227 | * If a request to abort was given, or the scan did not succeed | |
2a421b91 | 228 | * then we reset the scan state machine and terminate, |
6708dc86 JB |
229 | * re-queuing another scan if one has been requested |
230 | */ | |
231 | if (test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status)) | |
e1623446 | 232 | IWL_DEBUG_INFO(priv, "Aborted scan completed.\n"); |
2a421b91 | 233 | |
e1623446 | 234 | IWL_DEBUG_INFO(priv, "Setting scan to off\n"); |
2a421b91 TW |
235 | |
236 | clear_bit(STATUS_SCANNING, &priv->status); | |
237 | ||
2a421b91 | 238 | queue_work(priv->workqueue, &priv->scan_completed); |
2a421b91 TW |
239 | } |
240 | ||
241 | void iwl_setup_rx_scan_handlers(struct iwl_priv *priv) | |
242 | { | |
243 | /* scan handlers */ | |
244 | priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan; | |
245 | priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif; | |
246 | priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = | |
247 | iwl_rx_scan_results_notif; | |
248 | priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = | |
249 | iwl_rx_scan_complete_notif; | |
250 | } | |
251 | EXPORT_SYMBOL(iwl_setup_rx_scan_handlers); | |
252 | ||
77fecfb8 SO |
253 | inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, |
254 | enum ieee80211_band band, | |
255 | u8 n_probes) | |
2a421b91 TW |
256 | { |
257 | if (band == IEEE80211_BAND_5GHZ) | |
fe905f1d TW |
258 | return IWL_ACTIVE_DWELL_TIME_52 + |
259 | IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); | |
2a421b91 | 260 | else |
fe905f1d TW |
261 | return IWL_ACTIVE_DWELL_TIME_24 + |
262 | IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); | |
2a421b91 | 263 | } |
77fecfb8 | 264 | EXPORT_SYMBOL(iwl_get_active_dwell_time); |
2a421b91 | 265 | |
77fecfb8 SO |
266 | u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, |
267 | enum ieee80211_band band) | |
2a421b91 | 268 | { |
fe905f1d | 269 | u16 passive = (band == IEEE80211_BAND_2GHZ) ? |
2a421b91 TW |
270 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : |
271 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; | |
272 | ||
273 | if (iwl_is_associated(priv)) { | |
274 | /* If we're associated, we clamp the maximum passive | |
275 | * dwell time to be 98% of the beacon interval (minus | |
276 | * 2 * channel tune time) */ | |
277 | passive = priv->beacon_int; | |
278 | if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) | |
279 | passive = IWL_PASSIVE_DWELL_BASE; | |
280 | passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; | |
281 | } | |
282 | ||
2a421b91 TW |
283 | return passive; |
284 | } | |
77fecfb8 | 285 | EXPORT_SYMBOL(iwl_get_passive_dwell_time); |
2a421b91 | 286 | |
afbdd69a WYG |
287 | static int iwl_get_single_channel_for_scan(struct iwl_priv *priv, |
288 | enum ieee80211_band band, | |
289 | struct iwl_scan_channel *scan_ch) | |
290 | { | |
291 | const struct ieee80211_supported_band *sband; | |
292 | const struct iwl_channel_info *ch_info; | |
293 | u16 passive_dwell = 0; | |
294 | u16 active_dwell = 0; | |
295 | int i, added = 0; | |
296 | u16 channel = 0; | |
297 | ||
298 | sband = iwl_get_hw_mode(priv, band); | |
299 | if (!sband) { | |
300 | IWL_ERR(priv, "invalid band\n"); | |
301 | return added; | |
302 | } | |
303 | ||
304 | active_dwell = iwl_get_active_dwell_time(priv, band, 0); | |
305 | passive_dwell = iwl_get_passive_dwell_time(priv, band); | |
306 | ||
307 | if (passive_dwell <= active_dwell) | |
308 | passive_dwell = active_dwell + 1; | |
309 | ||
310 | /* only scan single channel, good enough to reset the RF */ | |
311 | /* pick the first valid not in-use channel */ | |
312 | if (band == IEEE80211_BAND_5GHZ) { | |
313 | for (i = 14; i < priv->channel_count; i++) { | |
314 | if (priv->channel_info[i].channel != | |
315 | le16_to_cpu(priv->staging_rxon.channel)) { | |
316 | channel = priv->channel_info[i].channel; | |
317 | ch_info = iwl_get_channel_info(priv, | |
318 | band, channel); | |
319 | if (is_channel_valid(ch_info)) | |
320 | break; | |
321 | } | |
322 | } | |
323 | } else { | |
324 | for (i = 0; i < 14; i++) { | |
325 | if (priv->channel_info[i].channel != | |
326 | le16_to_cpu(priv->staging_rxon.channel)) { | |
327 | channel = | |
328 | priv->channel_info[i].channel; | |
329 | ch_info = iwl_get_channel_info(priv, | |
330 | band, channel); | |
331 | if (is_channel_valid(ch_info)) | |
332 | break; | |
333 | } | |
334 | } | |
335 | } | |
336 | if (channel) { | |
337 | scan_ch->channel = cpu_to_le16(channel); | |
338 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; | |
339 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
340 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
341 | /* Set txpower levels to defaults */ | |
342 | scan_ch->dsp_atten = 110; | |
343 | if (band == IEEE80211_BAND_5GHZ) | |
344 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
345 | else | |
346 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
347 | added++; | |
348 | } else | |
349 | IWL_ERR(priv, "no valid channel found\n"); | |
350 | return added; | |
351 | } | |
352 | ||
2a421b91 TW |
353 | static int iwl_get_channels_for_scan(struct iwl_priv *priv, |
354 | enum ieee80211_band band, | |
fe905f1d | 355 | u8 is_active, u8 n_probes, |
2a421b91 TW |
356 | struct iwl_scan_channel *scan_ch) |
357 | { | |
4e05c234 | 358 | struct ieee80211_channel *chan; |
2a421b91 TW |
359 | const struct ieee80211_supported_band *sband; |
360 | const struct iwl_channel_info *ch_info; | |
361 | u16 passive_dwell = 0; | |
362 | u16 active_dwell = 0; | |
363 | int added, i; | |
d16dc48a | 364 | u16 channel; |
2a421b91 TW |
365 | |
366 | sband = iwl_get_hw_mode(priv, band); | |
367 | if (!sband) | |
368 | return 0; | |
369 | ||
fe905f1d | 370 | active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); |
2a421b91 TW |
371 | passive_dwell = iwl_get_passive_dwell_time(priv, band); |
372 | ||
fe905f1d TW |
373 | if (passive_dwell <= active_dwell) |
374 | passive_dwell = active_dwell + 1; | |
375 | ||
4e05c234 JB |
376 | for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { |
377 | chan = priv->scan_request->channels[i]; | |
378 | ||
379 | if (chan->band != band) | |
2a421b91 TW |
380 | continue; |
381 | ||
4e05c234 | 382 | channel = ieee80211_frequency_to_channel(chan->center_freq); |
d16dc48a | 383 | scan_ch->channel = cpu_to_le16(channel); |
2a421b91 | 384 | |
d16dc48a | 385 | ch_info = iwl_get_channel_info(priv, band, channel); |
2a421b91 | 386 | if (!is_channel_valid(ch_info)) { |
e1623446 | 387 | IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", |
d16dc48a | 388 | channel); |
2a421b91 TW |
389 | continue; |
390 | } | |
391 | ||
392 | if (!is_active || is_channel_passive(ch_info) || | |
4e05c234 | 393 | (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) |
d16dc48a | 394 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; |
2a421b91 | 395 | else |
d16dc48a | 396 | scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; |
2a421b91 | 397 | |
0ffe014a | 398 | if (n_probes) |
fe905f1d | 399 | scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); |
2a421b91 TW |
400 | |
401 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
402 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
403 | ||
404 | /* Set txpower levels to defaults */ | |
f53696de | 405 | scan_ch->dsp_atten = 110; |
2a421b91 | 406 | |
fe905f1d TW |
407 | /* NOTE: if we were doing 6Mb OFDM for scans we'd use |
408 | * power level: | |
409 | * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; | |
410 | */ | |
2a421b91 | 411 | if (band == IEEE80211_BAND_5GHZ) |
f53696de | 412 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; |
fe905f1d | 413 | else |
f53696de | 414 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); |
2a421b91 | 415 | |
e1623446 | 416 | IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", |
fe905f1d | 417 | channel, le32_to_cpu(scan_ch->type), |
d16dc48a TW |
418 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? |
419 | "ACTIVE" : "PASSIVE", | |
420 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
2a421b91 TW |
421 | active_dwell : passive_dwell); |
422 | ||
423 | scan_ch++; | |
424 | added++; | |
425 | } | |
426 | ||
91dd6c27 | 427 | IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added); |
2a421b91 TW |
428 | return added; |
429 | } | |
430 | ||
f53696de TW |
431 | void iwl_init_scan_params(struct iwl_priv *priv) |
432 | { | |
76eff18b | 433 | u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1; |
f53696de | 434 | if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ]) |
76eff18b | 435 | priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; |
f53696de | 436 | if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ]) |
76eff18b | 437 | priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; |
f53696de | 438 | } |
89f186a8 | 439 | EXPORT_SYMBOL(iwl_init_scan_params); |
f53696de | 440 | |
4e05c234 | 441 | static int iwl_scan_initiate(struct iwl_priv *priv) |
2a421b91 | 442 | { |
88be0264 JB |
443 | WARN_ON(!mutex_is_locked(&priv->mutex)); |
444 | ||
e1623446 | 445 | IWL_DEBUG_INFO(priv, "Starting scan...\n"); |
2a421b91 | 446 | set_bit(STATUS_SCANNING, &priv->status); |
afbdd69a | 447 | priv->is_internal_short_scan = false; |
2a421b91 | 448 | priv->scan_start = jiffies; |
2a421b91 TW |
449 | |
450 | queue_work(priv->workqueue, &priv->request_scan); | |
451 | ||
452 | return 0; | |
453 | } | |
2a421b91 | 454 | |
e9dde6f6 AK |
455 | int iwl_mac_hw_scan(struct ieee80211_hw *hw, |
456 | struct cfg80211_scan_request *req) | |
457 | { | |
458 | unsigned long flags; | |
459 | struct iwl_priv *priv = hw->priv; | |
00700ee0 | 460 | int ret; |
e9dde6f6 AK |
461 | |
462 | IWL_DEBUG_MAC80211(priv, "enter\n"); | |
463 | ||
00700ee0 JB |
464 | if (req->n_channels == 0) |
465 | return -EINVAL; | |
466 | ||
e9dde6f6 AK |
467 | mutex_lock(&priv->mutex); |
468 | spin_lock_irqsave(&priv->lock, flags); | |
469 | ||
470 | if (!iwl_is_ready_rf(priv)) { | |
471 | ret = -EIO; | |
472 | IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n"); | |
473 | goto out_unlock; | |
474 | } | |
475 | ||
bbcbb9ef RC |
476 | if (test_bit(STATUS_SCANNING, &priv->status)) { |
477 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); | |
478 | ret = -EAGAIN; | |
479 | goto out_unlock; | |
480 | } | |
481 | ||
482 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
483 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n"); | |
484 | ret = -EAGAIN; | |
485 | goto out_unlock; | |
486 | } | |
487 | ||
00700ee0 JB |
488 | /* mac80211 will only ask for one band at a time */ |
489 | priv->scan_band = req->channels[0]->band; | |
1ecf9fc1 | 490 | priv->scan_request = req; |
e9dde6f6 AK |
491 | |
492 | ret = iwl_scan_initiate(priv); | |
493 | ||
494 | IWL_DEBUG_MAC80211(priv, "leave\n"); | |
495 | ||
496 | out_unlock: | |
497 | spin_unlock_irqrestore(&priv->lock, flags); | |
498 | mutex_unlock(&priv->mutex); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | EXPORT_SYMBOL(iwl_mac_hw_scan); | |
503 | ||
afbdd69a WYG |
504 | /* |
505 | * internal short scan, this function should only been called while associated. | |
506 | * It will reset and tune the radio to prevent possible RF related problem | |
507 | */ | |
88be0264 | 508 | void iwl_internal_short_hw_scan(struct iwl_priv *priv) |
afbdd69a | 509 | { |
88be0264 JB |
510 | queue_work(priv->workqueue, &priv->start_internal_scan); |
511 | } | |
512 | ||
513 | static void iwl_bg_start_internal_scan(struct work_struct *work) | |
514 | { | |
515 | struct iwl_priv *priv = | |
516 | container_of(work, struct iwl_priv, start_internal_scan); | |
517 | ||
518 | mutex_lock(&priv->mutex); | |
afbdd69a WYG |
519 | |
520 | if (!iwl_is_ready_rf(priv)) { | |
afbdd69a | 521 | IWL_DEBUG_SCAN(priv, "not ready or exit pending\n"); |
88be0264 | 522 | goto unlock; |
afbdd69a | 523 | } |
88be0264 | 524 | |
afbdd69a WYG |
525 | if (test_bit(STATUS_SCANNING, &priv->status)) { |
526 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); | |
88be0264 | 527 | goto unlock; |
afbdd69a | 528 | } |
88be0264 | 529 | |
afbdd69a WYG |
530 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { |
531 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n"); | |
88be0264 | 532 | goto unlock; |
afbdd69a | 533 | } |
d4d59e88 | 534 | |
00700ee0 | 535 | priv->scan_band = priv->band; |
afbdd69a WYG |
536 | |
537 | IWL_DEBUG_SCAN(priv, "Start internal short scan...\n"); | |
538 | set_bit(STATUS_SCANNING, &priv->status); | |
539 | priv->is_internal_short_scan = true; | |
540 | queue_work(priv->workqueue, &priv->request_scan); | |
88be0264 JB |
541 | unlock: |
542 | mutex_unlock(&priv->mutex); | |
afbdd69a | 543 | } |
afbdd69a | 544 | |
2a421b91 TW |
545 | #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) |
546 | ||
77fecfb8 | 547 | void iwl_bg_scan_check(struct work_struct *data) |
2a421b91 TW |
548 | { |
549 | struct iwl_priv *priv = | |
550 | container_of(data, struct iwl_priv, scan_check.work); | |
551 | ||
552 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
553 | return; | |
554 | ||
555 | mutex_lock(&priv->mutex); | |
556 | if (test_bit(STATUS_SCANNING, &priv->status) || | |
557 | test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 558 | IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting " |
2a421b91 TW |
559 | "adapter (%dms)\n", |
560 | jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); | |
561 | ||
562 | if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
563 | iwl_send_scan_abort(priv); | |
564 | } | |
565 | mutex_unlock(&priv->mutex); | |
566 | } | |
77fecfb8 SO |
567 | EXPORT_SYMBOL(iwl_bg_scan_check); |
568 | ||
2a421b91 TW |
569 | /** |
570 | * iwl_fill_probe_req - fill in all required fields and IE for probe request | |
571 | */ | |
f53696de | 572 | |
1ecf9fc1 JB |
573 | u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame, |
574 | const u8 *ies, int ie_len, int left) | |
2a421b91 TW |
575 | { |
576 | int len = 0; | |
577 | u8 *pos = NULL; | |
f53696de | 578 | |
2a421b91 TW |
579 | /* Make sure there is enough space for the probe request, |
580 | * two mandatory IEs and the data */ | |
581 | left -= 24; | |
582 | if (left < 0) | |
583 | return 0; | |
2a421b91 TW |
584 | |
585 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
586 | memcpy(frame->da, iwl_bcast_addr, ETH_ALEN); | |
587 | memcpy(frame->sa, priv->mac_addr, ETH_ALEN); | |
588 | memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN); | |
589 | frame->seq_ctrl = 0; | |
590 | ||
f53696de TW |
591 | len += 24; |
592 | ||
2a421b91 | 593 | /* ...next IE... */ |
f53696de | 594 | pos = &frame->u.probe_req.variable[0]; |
2a421b91 | 595 | |
f53696de | 596 | /* fill in our indirect SSID IE */ |
2a421b91 TW |
597 | left -= 2; |
598 | if (left < 0) | |
599 | return 0; | |
2a421b91 | 600 | *pos++ = WLAN_EID_SSID; |
1382c71c RC |
601 | *pos++ = 0; |
602 | ||
603 | len += 2; | |
2a421b91 | 604 | |
1ecf9fc1 JB |
605 | if (WARN_ON(left < ie_len)) |
606 | return len; | |
2a421b91 | 607 | |
afbdd69a WYG |
608 | if (ies) |
609 | memcpy(pos, ies, ie_len); | |
1ecf9fc1 JB |
610 | len += ie_len; |
611 | left -= ie_len; | |
f53696de | 612 | |
2a421b91 TW |
613 | return (u16)len; |
614 | } | |
77fecfb8 | 615 | EXPORT_SYMBOL(iwl_fill_probe_req); |
2a421b91 TW |
616 | |
617 | static void iwl_bg_request_scan(struct work_struct *data) | |
618 | { | |
619 | struct iwl_priv *priv = | |
620 | container_of(data, struct iwl_priv, request_scan); | |
621 | struct iwl_host_cmd cmd = { | |
622 | .id = REPLY_SCAN_CMD, | |
623 | .len = sizeof(struct iwl_scan_cmd), | |
c2acea8e | 624 | .flags = CMD_SIZE_HUGE, |
2a421b91 TW |
625 | }; |
626 | struct iwl_scan_cmd *scan; | |
627 | struct ieee80211_conf *conf = NULL; | |
76eff18b | 628 | u32 rate_flags = 0; |
2a421b91 | 629 | u16 cmd_len; |
fff7a434 | 630 | u16 rx_chain = 0; |
2a421b91 | 631 | enum ieee80211_band band; |
1ecf9fc1 | 632 | u8 n_probes = 0; |
fff7a434 | 633 | u8 rx_ant = priv->hw_params.valid_rx_ant; |
76eff18b | 634 | u8 rate; |
1ecf9fc1 | 635 | bool is_active = false; |
a2b0f02e | 636 | int chan_mod; |
f1e3d7d4 | 637 | u8 active_chains; |
2a421b91 TW |
638 | |
639 | conf = ieee80211_get_hw_conf(priv->hw); | |
640 | ||
641 | mutex_lock(&priv->mutex); | |
642 | ||
fbc9f97b RC |
643 | cancel_delayed_work(&priv->scan_check); |
644 | ||
2a421b91 | 645 | if (!iwl_is_ready(priv)) { |
39aadf8c | 646 | IWL_WARN(priv, "request scan called when driver not ready.\n"); |
2a421b91 TW |
647 | goto done; |
648 | } | |
649 | ||
a96a27f9 | 650 | /* Make sure the scan wasn't canceled before this queued work |
2a421b91 TW |
651 | * was given the chance to run... */ |
652 | if (!test_bit(STATUS_SCANNING, &priv->status)) | |
653 | goto done; | |
654 | ||
655 | /* This should never be called or scheduled if there is currently | |
656 | * a scan active in the hardware. */ | |
657 | if (test_bit(STATUS_SCAN_HW, &priv->status)) { | |
e1623446 | 658 | IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. " |
2a421b91 | 659 | "Ignoring second request.\n"); |
2a421b91 TW |
660 | goto done; |
661 | } | |
662 | ||
663 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { | |
e1623446 | 664 | IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); |
2a421b91 TW |
665 | goto done; |
666 | } | |
667 | ||
668 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 669 | IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); |
2a421b91 TW |
670 | goto done; |
671 | } | |
672 | ||
673 | if (iwl_is_rfkill(priv)) { | |
e1623446 | 674 | IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); |
2a421b91 TW |
675 | goto done; |
676 | } | |
677 | ||
678 | if (!test_bit(STATUS_READY, &priv->status)) { | |
e1623446 | 679 | IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); |
2a421b91 TW |
680 | goto done; |
681 | } | |
682 | ||
811ecc99 JB |
683 | if (!priv->scan_cmd) { |
684 | priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) + | |
685 | IWL_MAX_SCAN_SIZE, GFP_KERNEL); | |
686 | if (!priv->scan_cmd) { | |
13115ba7 WYG |
687 | IWL_DEBUG_SCAN(priv, |
688 | "fail to allocate memory for scan\n"); | |
2a421b91 TW |
689 | goto done; |
690 | } | |
691 | } | |
811ecc99 | 692 | scan = priv->scan_cmd; |
2a421b91 TW |
693 | memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE); |
694 | ||
695 | scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; | |
696 | scan->quiet_time = IWL_ACTIVE_QUIET_TIME; | |
697 | ||
698 | if (iwl_is_associated(priv)) { | |
699 | u16 interval = 0; | |
700 | u32 extra; | |
701 | u32 suspend_time = 100; | |
702 | u32 scan_suspend_time = 100; | |
703 | unsigned long flags; | |
704 | ||
e1623446 | 705 | IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); |
2a421b91 TW |
706 | spin_lock_irqsave(&priv->lock, flags); |
707 | interval = priv->beacon_int; | |
708 | spin_unlock_irqrestore(&priv->lock, flags); | |
709 | ||
710 | scan->suspend_time = 0; | |
711 | scan->max_out_time = cpu_to_le32(200 * 1024); | |
712 | if (!interval) | |
713 | interval = suspend_time; | |
714 | ||
715 | extra = (suspend_time / interval) << 22; | |
716 | scan_suspend_time = (extra | | |
717 | ((suspend_time % interval) * 1024)); | |
718 | scan->suspend_time = cpu_to_le32(scan_suspend_time); | |
e1623446 | 719 | IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", |
2a421b91 TW |
720 | scan_suspend_time, interval); |
721 | } | |
722 | ||
afbdd69a WYG |
723 | if (priv->is_internal_short_scan) { |
724 | IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); | |
725 | } else if (priv->scan_request->n_ssids) { | |
1382c71c | 726 | int i, p = 0; |
1ecf9fc1 | 727 | IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); |
1382c71c RC |
728 | for (i = 0; i < priv->scan_request->n_ssids; i++) { |
729 | /* always does wildcard anyway */ | |
730 | if (!priv->scan_request->ssids[i].ssid_len) | |
731 | continue; | |
732 | scan->direct_scan[p].id = WLAN_EID_SSID; | |
733 | scan->direct_scan[p].len = | |
734 | priv->scan_request->ssids[i].ssid_len; | |
735 | memcpy(scan->direct_scan[p].ssid, | |
736 | priv->scan_request->ssids[i].ssid, | |
737 | priv->scan_request->ssids[i].ssid_len); | |
738 | n_probes++; | |
739 | p++; | |
1ecf9fc1 JB |
740 | } |
741 | is_active = true; | |
742 | } else | |
743 | IWL_DEBUG_SCAN(priv, "Start passive scan.\n"); | |
2a421b91 TW |
744 | |
745 | scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; | |
746 | scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; | |
747 | scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
748 | ||
00700ee0 JB |
749 | switch (priv->scan_band) { |
750 | case IEEE80211_BAND_2GHZ: | |
2a421b91 | 751 | scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; |
a2b0f02e WYG |
752 | chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK) |
753 | >> RXON_FLG_CHANNEL_MODE_POS; | |
754 | if (chan_mod == CHANNEL_MODE_PURE_40) { | |
76eff18b TW |
755 | rate = IWL_RATE_6M_PLCP; |
756 | } else { | |
757 | rate = IWL_RATE_1M_PLCP; | |
758 | rate_flags = RATE_MCS_CCK_MSK; | |
759 | } | |
2a421b91 | 760 | scan->good_CRC_th = 0; |
00700ee0 JB |
761 | break; |
762 | case IEEE80211_BAND_5GHZ: | |
76eff18b | 763 | rate = IWL_RATE_6M_PLCP; |
b097ad29 JB |
764 | /* |
765 | * If active scaning is requested but a certain channel | |
766 | * is marked passive, we can do active scanning if we | |
767 | * detect transmissions. | |
768 | */ | |
769 | scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0; | |
2a421b91 | 770 | |
d28667f8 WYG |
771 | /* Force use of chains B and C (0x6) for scan Rx |
772 | * Avoid A (0x1) for the device has off-channel reception | |
773 | * on A-band. | |
5118303f | 774 | */ |
d28667f8 | 775 | if (priv->cfg->off_channel_workaround) |
fff7a434 | 776 | rx_ant = ANT_BC; |
00700ee0 JB |
777 | break; |
778 | default: | |
39aadf8c | 779 | IWL_WARN(priv, "Invalid scan band count\n"); |
2a421b91 TW |
780 | goto done; |
781 | } | |
782 | ||
00700ee0 JB |
783 | band = priv->scan_band; |
784 | ||
76eff18b | 785 | priv->scan_tx_ant[band] = |
00700ee0 | 786 | iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]); |
76eff18b TW |
787 | rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); |
788 | scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); | |
789 | ||
f1e3d7d4 SZ |
790 | /* In power save mode use one chain, otherwise use all chains */ |
791 | if (test_bit(STATUS_POWER_PMI, &priv->status)) { | |
792 | /* rx_ant has been set to all valid chains previously */ | |
793 | active_chains = rx_ant & | |
794 | ((u8)(priv->chain_noise_data.active_chains)); | |
795 | if (!active_chains) | |
796 | active_chains = rx_ant; | |
797 | ||
798 | IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n", | |
799 | priv->chain_noise_data.active_chains); | |
800 | ||
801 | rx_ant = first_antenna(active_chains); | |
802 | } | |
5118303f | 803 | /* MIMO is not used here, but value is required */ |
b23aa883 | 804 | rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; |
f1e3d7d4 | 805 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; |
fff7a434 WYG |
806 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; |
807 | rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; | |
808 | scan->rx_chain = cpu_to_le16(rx_chain); | |
afbdd69a WYG |
809 | if (!priv->is_internal_short_scan) { |
810 | cmd_len = iwl_fill_probe_req(priv, | |
811 | (struct ieee80211_mgmt *)scan->data, | |
812 | priv->scan_request->ie, | |
813 | priv->scan_request->ie_len, | |
814 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
815 | } else { | |
816 | cmd_len = iwl_fill_probe_req(priv, | |
817 | (struct ieee80211_mgmt *)scan->data, | |
818 | NULL, 0, | |
819 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
2a421b91 | 820 | |
afbdd69a | 821 | } |
2a421b91 | 822 | scan->tx_cmd.len = cpu_to_le16(cmd_len); |
279b05d4 | 823 | if (iwl_is_monitor_mode(priv)) |
2a421b91 TW |
824 | scan->filter_flags = RXON_FILTER_PROMISC_MSK; |
825 | ||
f53696de TW |
826 | scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | |
827 | RXON_FILTER_BCON_AWARE_MSK); | |
828 | ||
afbdd69a WYG |
829 | if (priv->is_internal_short_scan) { |
830 | scan->channel_count = | |
831 | iwl_get_single_channel_for_scan(priv, band, | |
832 | (void *)&scan->data[le16_to_cpu( | |
833 | scan->tx_cmd.len)]); | |
834 | } else { | |
835 | scan->channel_count = | |
836 | iwl_get_channels_for_scan(priv, band, | |
837 | is_active, n_probes, | |
838 | (void *)&scan->data[le16_to_cpu( | |
839 | scan->tx_cmd.len)]); | |
840 | } | |
f53696de | 841 | if (scan->channel_count == 0) { |
e1623446 | 842 | IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); |
f53696de TW |
843 | goto done; |
844 | } | |
2a421b91 | 845 | |
2a421b91 TW |
846 | cmd.len += le16_to_cpu(scan->tx_cmd.len) + |
847 | scan->channel_count * sizeof(struct iwl_scan_channel); | |
848 | cmd.data = scan; | |
849 | scan->len = cpu_to_le16(cmd.len); | |
850 | ||
851 | set_bit(STATUS_SCAN_HW, &priv->status); | |
13115ba7 | 852 | if (iwl_send_cmd_sync(priv, &cmd)) |
2a421b91 TW |
853 | goto done; |
854 | ||
855 | queue_delayed_work(priv->workqueue, &priv->scan_check, | |
856 | IWL_SCAN_CHECK_WATCHDOG); | |
857 | ||
858 | mutex_unlock(&priv->mutex); | |
859 | return; | |
860 | ||
861 | done: | |
951891c7 MA |
862 | /* Cannot perform scan. Make sure we clear scanning |
863 | * bits from status so next scan request can be performed. | |
864 | * If we don't clear scanning status bit here all next scan | |
865 | * will fail | |
866 | */ | |
867 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
868 | clear_bit(STATUS_SCANNING, &priv->status); | |
2a421b91 TW |
869 | /* inform mac80211 scan aborted */ |
870 | queue_work(priv->workqueue, &priv->scan_completed); | |
871 | mutex_unlock(&priv->mutex); | |
872 | } | |
873 | ||
77fecfb8 | 874 | void iwl_bg_abort_scan(struct work_struct *work) |
2a421b91 TW |
875 | { |
876 | struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); | |
877 | ||
5bddf549 WYG |
878 | if (!test_bit(STATUS_READY, &priv->status) || |
879 | !test_bit(STATUS_GEO_CONFIGURED, &priv->status)) | |
2a421b91 TW |
880 | return; |
881 | ||
882 | mutex_lock(&priv->mutex); | |
883 | ||
884 | set_bit(STATUS_SCAN_ABORTING, &priv->status); | |
885 | iwl_send_scan_abort(priv); | |
886 | ||
887 | mutex_unlock(&priv->mutex); | |
888 | } | |
77fecfb8 | 889 | EXPORT_SYMBOL(iwl_bg_abort_scan); |
2a421b91 | 890 | |
77fecfb8 | 891 | void iwl_bg_scan_completed(struct work_struct *work) |
eedda367 TW |
892 | { |
893 | struct iwl_priv *priv = | |
894 | container_of(work, struct iwl_priv, scan_completed); | |
895 | ||
e1623446 | 896 | IWL_DEBUG_SCAN(priv, "SCAN complete scan\n"); |
eedda367 | 897 | |
fbc9f97b RC |
898 | cancel_delayed_work(&priv->scan_check); |
899 | ||
afbdd69a WYG |
900 | if (!priv->is_internal_short_scan) |
901 | ieee80211_scan_completed(priv->hw, false); | |
902 | else { | |
903 | priv->is_internal_short_scan = false; | |
904 | IWL_DEBUG_SCAN(priv, "internal short scan completed\n"); | |
905 | } | |
74aa9be0 | 906 | |
eedda367 TW |
907 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
908 | return; | |
909 | ||
eedda367 TW |
910 | /* Since setting the TXPOWER may have been deferred while |
911 | * performing the scan, fire one off */ | |
912 | mutex_lock(&priv->mutex); | |
913 | iwl_set_tx_power(priv, priv->tx_power_user_lmt, true); | |
914 | mutex_unlock(&priv->mutex); | |
915 | } | |
77fecfb8 | 916 | EXPORT_SYMBOL(iwl_bg_scan_completed); |
eedda367 | 917 | |
2a421b91 TW |
918 | void iwl_setup_scan_deferred_work(struct iwl_priv *priv) |
919 | { | |
eedda367 | 920 | INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); |
2a421b91 TW |
921 | INIT_WORK(&priv->request_scan, iwl_bg_request_scan); |
922 | INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); | |
88be0264 | 923 | INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan); |
2a421b91 TW |
924 | INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); |
925 | } | |
926 | EXPORT_SYMBOL(iwl_setup_scan_deferred_work); | |
927 |