Commit | Line | Data |
---|---|---|
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 | *****************************************************************************/ | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
7e272fcf | 29 | #include <linux/types.h> |
2a421b91 | 30 | #include <linux/etherdevice.h> |
7e272fcf | 31 | #include <net/mac80211.h> |
2a421b91 TW |
32 | |
33 | #include "iwl-eeprom.h" | |
34 | #include "iwl-dev.h" | |
35 | #include "iwl-core.h" | |
36 | #include "iwl-sta.h" | |
37 | #include "iwl-io.h" | |
38 | #include "iwl-helpers.h" | |
39 | ||
40 | /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after | |
41 | * sending probe req. This should be set long enough to hear probe responses | |
42 | * from more than one AP. */ | |
fe905f1d TW |
43 | #define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ |
44 | #define IWL_ACTIVE_DWELL_TIME_52 (20) | |
45 | ||
46 | #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3) | |
47 | #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2) | |
2a421b91 | 48 | |
2a421b91 TW |
49 | /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. |
50 | * Must be set longer than active dwell time. | |
51 | * For the most reliable scan, set > AP beacon interval (typically 100msec). */ | |
52 | #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ | |
53 | #define IWL_PASSIVE_DWELL_TIME_52 (10) | |
54 | #define IWL_PASSIVE_DWELL_BASE (100) | |
55 | #define IWL_CHANNEL_TUNE_TIME 5 | |
56 | ||
fe905f1d TW |
57 | |
58 | ||
2a421b91 TW |
59 | /** |
60 | * iwl_scan_cancel - Cancel any currently executing HW scan | |
61 | * | |
62 | * NOTE: priv->mutex is not required before calling this function | |
63 | */ | |
64 | int iwl_scan_cancel(struct iwl_priv *priv) | |
65 | { | |
66 | if (!test_bit(STATUS_SCAN_HW, &priv->status)) { | |
67 | clear_bit(STATUS_SCANNING, &priv->status); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | if (test_bit(STATUS_SCANNING, &priv->status)) { | |
72 | if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 73 | IWL_DEBUG_SCAN(priv, "Queuing scan abort.\n"); |
2a421b91 TW |
74 | set_bit(STATUS_SCAN_ABORTING, &priv->status); |
75 | queue_work(priv->workqueue, &priv->abort_scan); | |
76 | ||
77 | } else | |
e1623446 | 78 | IWL_DEBUG_SCAN(priv, "Scan abort already in progress.\n"); |
2a421b91 TW |
79 | |
80 | return test_bit(STATUS_SCANNING, &priv->status); | |
81 | } | |
82 | ||
83 | return 0; | |
84 | } | |
85 | EXPORT_SYMBOL(iwl_scan_cancel); | |
86 | /** | |
87 | * iwl_scan_cancel_timeout - Cancel any currently executing HW scan | |
88 | * @ms: amount of time to wait (in milliseconds) for scan to abort | |
89 | * | |
90 | * NOTE: priv->mutex must be held before calling this function | |
91 | */ | |
92 | int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms) | |
93 | { | |
94 | unsigned long now = jiffies; | |
95 | int ret; | |
96 | ||
97 | ret = iwl_scan_cancel(priv); | |
98 | if (ret && ms) { | |
99 | mutex_unlock(&priv->mutex); | |
100 | while (!time_after(jiffies, now + msecs_to_jiffies(ms)) && | |
101 | test_bit(STATUS_SCANNING, &priv->status)) | |
102 | msleep(1); | |
103 | mutex_lock(&priv->mutex); | |
104 | ||
105 | return test_bit(STATUS_SCANNING, &priv->status); | |
106 | } | |
107 | ||
108 | return ret; | |
109 | } | |
110 | EXPORT_SYMBOL(iwl_scan_cancel_timeout); | |
111 | ||
4e05c234 | 112 | static int iwl_send_scan_abort(struct iwl_priv *priv) |
2a421b91 TW |
113 | { |
114 | int ret = 0; | |
2f301227 | 115 | struct iwl_rx_packet *pkt; |
2a421b91 TW |
116 | struct iwl_host_cmd cmd = { |
117 | .id = REPLY_SCAN_ABORT_CMD, | |
c2acea8e | 118 | .flags = CMD_WANT_SKB, |
2a421b91 TW |
119 | }; |
120 | ||
121 | /* If there isn't a scan actively going on in the hardware | |
122 | * then we are in between scan bands and not actually | |
123 | * actively scanning, so don't send the abort command */ | |
124 | if (!test_bit(STATUS_SCAN_HW, &priv->status)) { | |
125 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | ret = iwl_send_cmd_sync(priv, &cmd); | |
130 | if (ret) { | |
131 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); | |
132 | return ret; | |
133 | } | |
134 | ||
2f301227 ZY |
135 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
136 | if (pkt->u.status != CAN_ABORT_STATUS) { | |
2a421b91 TW |
137 | /* The scan abort will return 1 for success or |
138 | * 2 for "failure". A failure condition can be | |
139 | * due to simply not being in an active scan which | |
140 | * can occur if we send the scan abort before we | |
141 | * the microcode has notified us that a scan is | |
142 | * completed. */ | |
2f301227 | 143 | IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", pkt->u.status); |
2a421b91 TW |
144 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
145 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
146 | } | |
147 | ||
64a76b50 | 148 | iwl_free_pages(priv, cmd.reply_page); |
2a421b91 TW |
149 | |
150 | return ret; | |
151 | } | |
2a421b91 TW |
152 | |
153 | /* Service response to REPLY_SCAN_CMD (0x80) */ | |
154 | static void iwl_rx_reply_scan(struct iwl_priv *priv, | |
155 | struct iwl_rx_mem_buffer *rxb) | |
156 | { | |
157 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 158 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
159 | struct iwl_scanreq_notification *notif = |
160 | (struct iwl_scanreq_notification *)pkt->u.raw; | |
161 | ||
e1623446 | 162 | IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status); |
2a421b91 TW |
163 | #endif |
164 | } | |
165 | ||
166 | /* Service SCAN_START_NOTIFICATION (0x82) */ | |
167 | static void iwl_rx_scan_start_notif(struct iwl_priv *priv, | |
168 | struct iwl_rx_mem_buffer *rxb) | |
169 | { | |
2f301227 | 170 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
171 | struct iwl_scanstart_notification *notif = |
172 | (struct iwl_scanstart_notification *)pkt->u.raw; | |
173 | priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); | |
e1623446 | 174 | IWL_DEBUG_SCAN(priv, "Scan start: " |
2a421b91 TW |
175 | "%d [802.11%s] " |
176 | "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", | |
177 | notif->channel, | |
178 | notif->band ? "bg" : "a", | |
fe905f1d TW |
179 | le32_to_cpu(notif->tsf_high), |
180 | le32_to_cpu(notif->tsf_low), | |
181 | notif->status, notif->beacon_timer); | |
2a421b91 TW |
182 | } |
183 | ||
184 | /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ | |
185 | static void iwl_rx_scan_results_notif(struct iwl_priv *priv, | |
186 | struct iwl_rx_mem_buffer *rxb) | |
187 | { | |
188 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 189 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
190 | struct iwl_scanresults_notification *notif = |
191 | (struct iwl_scanresults_notification *)pkt->u.raw; | |
192 | ||
e1623446 | 193 | IWL_DEBUG_SCAN(priv, "Scan ch.res: " |
2a421b91 TW |
194 | "%d [802.11%s] " |
195 | "(TSF: 0x%08X:%08X) - %d " | |
220575f7 | 196 | "elapsed=%lu usec\n", |
2a421b91 TW |
197 | notif->channel, |
198 | notif->band ? "bg" : "a", | |
199 | le32_to_cpu(notif->tsf_high), | |
200 | le32_to_cpu(notif->tsf_low), | |
201 | le32_to_cpu(notif->statistics[0]), | |
220575f7 | 202 | le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf); |
2a421b91 TW |
203 | #endif |
204 | ||
d4d59e88 WYG |
205 | if (!priv->is_internal_short_scan) |
206 | priv->next_scan_jiffies = 0; | |
2a421b91 TW |
207 | } |
208 | ||
209 | /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ | |
210 | static void iwl_rx_scan_complete_notif(struct iwl_priv *priv, | |
211 | struct iwl_rx_mem_buffer *rxb) | |
212 | { | |
cb9289cb | 213 | #ifdef CONFIG_IWLWIFI_DEBUG |
2f301227 | 214 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
2a421b91 TW |
215 | struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw; |
216 | ||
e1623446 | 217 | IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", |
2a421b91 TW |
218 | scan_notif->scanned_channels, |
219 | scan_notif->tsf_low, | |
220 | scan_notif->tsf_high, scan_notif->status); | |
cb9289cb | 221 | #endif |
2a421b91 TW |
222 | |
223 | /* The HW is no longer scanning */ | |
224 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
225 | ||
e1623446 | 226 | IWL_DEBUG_INFO(priv, "Scan pass on %sGHz took %dms\n", |
1b63ba8a DM |
227 | (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ? |
228 | "2.4" : "5.2", | |
2a421b91 TW |
229 | jiffies_to_msecs(elapsed_jiffies |
230 | (priv->scan_pass_start, jiffies))); | |
231 | ||
1b63ba8a DM |
232 | /* Remove this scanned band from the list of pending |
233 | * bands to scan, band G precedes A in order of scanning | |
234 | * as seen in iwl_bg_request_scan */ | |
235 | if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) | |
236 | priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ); | |
237 | else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) | |
238 | priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ); | |
2a421b91 TW |
239 | |
240 | /* If a request to abort was given, or the scan did not succeed | |
241 | * then we reset the scan state machine and terminate, | |
242 | * re-queuing another scan if one has been requested */ | |
243 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 244 | IWL_DEBUG_INFO(priv, "Aborted scan completed.\n"); |
2a421b91 TW |
245 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
246 | } else { | |
247 | /* If there are more bands on this scan pass reschedule */ | |
1b63ba8a | 248 | if (priv->scan_bands) |
2a421b91 TW |
249 | goto reschedule; |
250 | } | |
251 | ||
d4d59e88 WYG |
252 | if (!priv->is_internal_short_scan) |
253 | priv->next_scan_jiffies = 0; | |
d4d59e88 | 254 | |
e1623446 | 255 | IWL_DEBUG_INFO(priv, "Setting scan to off\n"); |
2a421b91 TW |
256 | |
257 | clear_bit(STATUS_SCANNING, &priv->status); | |
258 | ||
e1623446 | 259 | IWL_DEBUG_INFO(priv, "Scan took %dms\n", |
2a421b91 TW |
260 | jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies))); |
261 | ||
262 | queue_work(priv->workqueue, &priv->scan_completed); | |
263 | ||
264 | return; | |
265 | ||
266 | reschedule: | |
267 | priv->scan_pass_start = jiffies; | |
268 | queue_work(priv->workqueue, &priv->request_scan); | |
269 | } | |
270 | ||
271 | void iwl_setup_rx_scan_handlers(struct iwl_priv *priv) | |
272 | { | |
273 | /* scan handlers */ | |
274 | priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan; | |
275 | priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif; | |
276 | priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = | |
277 | iwl_rx_scan_results_notif; | |
278 | priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = | |
279 | iwl_rx_scan_complete_notif; | |
280 | } | |
281 | EXPORT_SYMBOL(iwl_setup_rx_scan_handlers); | |
282 | ||
77fecfb8 SO |
283 | inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, |
284 | enum ieee80211_band band, | |
285 | u8 n_probes) | |
2a421b91 TW |
286 | { |
287 | if (band == IEEE80211_BAND_5GHZ) | |
fe905f1d TW |
288 | return IWL_ACTIVE_DWELL_TIME_52 + |
289 | IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); | |
2a421b91 | 290 | else |
fe905f1d TW |
291 | return IWL_ACTIVE_DWELL_TIME_24 + |
292 | IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); | |
2a421b91 | 293 | } |
77fecfb8 | 294 | EXPORT_SYMBOL(iwl_get_active_dwell_time); |
2a421b91 | 295 | |
77fecfb8 SO |
296 | u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, |
297 | enum ieee80211_band band) | |
2a421b91 | 298 | { |
fe905f1d | 299 | u16 passive = (band == IEEE80211_BAND_2GHZ) ? |
2a421b91 TW |
300 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : |
301 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; | |
302 | ||
303 | if (iwl_is_associated(priv)) { | |
304 | /* If we're associated, we clamp the maximum passive | |
305 | * dwell time to be 98% of the beacon interval (minus | |
306 | * 2 * channel tune time) */ | |
307 | passive = priv->beacon_int; | |
308 | if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) | |
309 | passive = IWL_PASSIVE_DWELL_BASE; | |
310 | passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; | |
311 | } | |
312 | ||
2a421b91 TW |
313 | return passive; |
314 | } | |
77fecfb8 | 315 | EXPORT_SYMBOL(iwl_get_passive_dwell_time); |
2a421b91 | 316 | |
afbdd69a WYG |
317 | static int iwl_get_single_channel_for_scan(struct iwl_priv *priv, |
318 | enum ieee80211_band band, | |
319 | struct iwl_scan_channel *scan_ch) | |
320 | { | |
321 | const struct ieee80211_supported_band *sband; | |
322 | const struct iwl_channel_info *ch_info; | |
323 | u16 passive_dwell = 0; | |
324 | u16 active_dwell = 0; | |
325 | int i, added = 0; | |
326 | u16 channel = 0; | |
327 | ||
328 | sband = iwl_get_hw_mode(priv, band); | |
329 | if (!sband) { | |
330 | IWL_ERR(priv, "invalid band\n"); | |
331 | return added; | |
332 | } | |
333 | ||
334 | active_dwell = iwl_get_active_dwell_time(priv, band, 0); | |
335 | passive_dwell = iwl_get_passive_dwell_time(priv, band); | |
336 | ||
337 | if (passive_dwell <= active_dwell) | |
338 | passive_dwell = active_dwell + 1; | |
339 | ||
340 | /* only scan single channel, good enough to reset the RF */ | |
341 | /* pick the first valid not in-use channel */ | |
342 | if (band == IEEE80211_BAND_5GHZ) { | |
343 | for (i = 14; i < priv->channel_count; i++) { | |
344 | if (priv->channel_info[i].channel != | |
345 | le16_to_cpu(priv->staging_rxon.channel)) { | |
346 | channel = priv->channel_info[i].channel; | |
347 | ch_info = iwl_get_channel_info(priv, | |
348 | band, channel); | |
349 | if (is_channel_valid(ch_info)) | |
350 | break; | |
351 | } | |
352 | } | |
353 | } else { | |
354 | for (i = 0; i < 14; i++) { | |
355 | if (priv->channel_info[i].channel != | |
356 | le16_to_cpu(priv->staging_rxon.channel)) { | |
357 | channel = | |
358 | priv->channel_info[i].channel; | |
359 | ch_info = iwl_get_channel_info(priv, | |
360 | band, channel); | |
361 | if (is_channel_valid(ch_info)) | |
362 | break; | |
363 | } | |
364 | } | |
365 | } | |
366 | if (channel) { | |
367 | scan_ch->channel = cpu_to_le16(channel); | |
368 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; | |
369 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
370 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
371 | /* Set txpower levels to defaults */ | |
372 | scan_ch->dsp_atten = 110; | |
373 | if (band == IEEE80211_BAND_5GHZ) | |
374 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
375 | else | |
376 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
377 | added++; | |
378 | } else | |
379 | IWL_ERR(priv, "no valid channel found\n"); | |
380 | return added; | |
381 | } | |
382 | ||
2a421b91 TW |
383 | static int iwl_get_channels_for_scan(struct iwl_priv *priv, |
384 | enum ieee80211_band band, | |
fe905f1d | 385 | u8 is_active, u8 n_probes, |
2a421b91 TW |
386 | struct iwl_scan_channel *scan_ch) |
387 | { | |
4e05c234 | 388 | struct ieee80211_channel *chan; |
2a421b91 TW |
389 | const struct ieee80211_supported_band *sband; |
390 | const struct iwl_channel_info *ch_info; | |
391 | u16 passive_dwell = 0; | |
392 | u16 active_dwell = 0; | |
393 | int added, i; | |
d16dc48a | 394 | u16 channel; |
2a421b91 TW |
395 | |
396 | sband = iwl_get_hw_mode(priv, band); | |
397 | if (!sband) | |
398 | return 0; | |
399 | ||
fe905f1d | 400 | active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); |
2a421b91 TW |
401 | passive_dwell = iwl_get_passive_dwell_time(priv, band); |
402 | ||
fe905f1d TW |
403 | if (passive_dwell <= active_dwell) |
404 | passive_dwell = active_dwell + 1; | |
405 | ||
4e05c234 JB |
406 | for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { |
407 | chan = priv->scan_request->channels[i]; | |
408 | ||
409 | if (chan->band != band) | |
2a421b91 TW |
410 | continue; |
411 | ||
4e05c234 | 412 | channel = ieee80211_frequency_to_channel(chan->center_freq); |
d16dc48a | 413 | scan_ch->channel = cpu_to_le16(channel); |
2a421b91 | 414 | |
d16dc48a | 415 | ch_info = iwl_get_channel_info(priv, band, channel); |
2a421b91 | 416 | if (!is_channel_valid(ch_info)) { |
e1623446 | 417 | IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", |
d16dc48a | 418 | channel); |
2a421b91 TW |
419 | continue; |
420 | } | |
421 | ||
422 | if (!is_active || is_channel_passive(ch_info) || | |
4e05c234 | 423 | (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) |
d16dc48a | 424 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; |
2a421b91 | 425 | else |
d16dc48a | 426 | scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; |
2a421b91 | 427 | |
0ffe014a | 428 | if (n_probes) |
fe905f1d | 429 | scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); |
2a421b91 TW |
430 | |
431 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
432 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
433 | ||
434 | /* Set txpower levels to defaults */ | |
f53696de | 435 | scan_ch->dsp_atten = 110; |
2a421b91 | 436 | |
fe905f1d TW |
437 | /* NOTE: if we were doing 6Mb OFDM for scans we'd use |
438 | * power level: | |
439 | * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; | |
440 | */ | |
2a421b91 | 441 | if (band == IEEE80211_BAND_5GHZ) |
f53696de | 442 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; |
fe905f1d | 443 | else |
f53696de | 444 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); |
2a421b91 | 445 | |
e1623446 | 446 | IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", |
fe905f1d | 447 | channel, le32_to_cpu(scan_ch->type), |
d16dc48a TW |
448 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? |
449 | "ACTIVE" : "PASSIVE", | |
450 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
2a421b91 TW |
451 | active_dwell : passive_dwell); |
452 | ||
453 | scan_ch++; | |
454 | added++; | |
455 | } | |
456 | ||
e1623446 | 457 | IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added); |
2a421b91 TW |
458 | return added; |
459 | } | |
460 | ||
f53696de TW |
461 | void iwl_init_scan_params(struct iwl_priv *priv) |
462 | { | |
76eff18b | 463 | u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1; |
f53696de | 464 | if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ]) |
76eff18b | 465 | priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; |
f53696de | 466 | if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ]) |
76eff18b | 467 | priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; |
f53696de | 468 | } |
89f186a8 | 469 | EXPORT_SYMBOL(iwl_init_scan_params); |
f53696de | 470 | |
4e05c234 | 471 | static int iwl_scan_initiate(struct iwl_priv *priv) |
2a421b91 | 472 | { |
88be0264 JB |
473 | WARN_ON(!mutex_is_locked(&priv->mutex)); |
474 | ||
e1623446 | 475 | IWL_DEBUG_INFO(priv, "Starting scan...\n"); |
2a421b91 | 476 | set_bit(STATUS_SCANNING, &priv->status); |
afbdd69a | 477 | priv->is_internal_short_scan = false; |
2a421b91 TW |
478 | priv->scan_start = jiffies; |
479 | priv->scan_pass_start = priv->scan_start; | |
480 | ||
481 | queue_work(priv->workqueue, &priv->request_scan); | |
482 | ||
483 | return 0; | |
484 | } | |
2a421b91 | 485 | |
e9dde6f6 AK |
486 | #define IWL_DELAY_NEXT_SCAN (HZ*2) |
487 | ||
488 | int iwl_mac_hw_scan(struct ieee80211_hw *hw, | |
489 | struct cfg80211_scan_request *req) | |
490 | { | |
491 | unsigned long flags; | |
492 | struct iwl_priv *priv = hw->priv; | |
4e05c234 | 493 | int ret, i; |
e9dde6f6 AK |
494 | |
495 | IWL_DEBUG_MAC80211(priv, "enter\n"); | |
496 | ||
497 | mutex_lock(&priv->mutex); | |
498 | spin_lock_irqsave(&priv->lock, flags); | |
499 | ||
500 | if (!iwl_is_ready_rf(priv)) { | |
501 | ret = -EIO; | |
502 | IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n"); | |
503 | goto out_unlock; | |
504 | } | |
505 | ||
bbcbb9ef RC |
506 | if (test_bit(STATUS_SCANNING, &priv->status)) { |
507 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); | |
508 | ret = -EAGAIN; | |
509 | goto out_unlock; | |
510 | } | |
511 | ||
512 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
513 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n"); | |
514 | ret = -EAGAIN; | |
515 | goto out_unlock; | |
516 | } | |
517 | ||
e9dde6f6 AK |
518 | /* We don't schedule scan within next_scan_jiffies period. |
519 | * Avoid scanning during possible EAPOL exchange, return | |
520 | * success immediately. | |
521 | */ | |
522 | if (priv->next_scan_jiffies && | |
523 | time_after(priv->next_scan_jiffies, jiffies)) { | |
524 | IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n"); | |
525 | queue_work(priv->workqueue, &priv->scan_completed); | |
e9dde6f6 AK |
526 | ret = 0; |
527 | goto out_unlock; | |
528 | } | |
529 | ||
4e05c234 JB |
530 | priv->scan_bands = 0; |
531 | for (i = 0; i < req->n_channels; i++) | |
532 | priv->scan_bands |= BIT(req->channels[i]->band); | |
533 | ||
1ecf9fc1 | 534 | priv->scan_request = req; |
e9dde6f6 AK |
535 | |
536 | ret = iwl_scan_initiate(priv); | |
537 | ||
538 | IWL_DEBUG_MAC80211(priv, "leave\n"); | |
539 | ||
540 | out_unlock: | |
541 | spin_unlock_irqrestore(&priv->lock, flags); | |
542 | mutex_unlock(&priv->mutex); | |
543 | ||
544 | return ret; | |
545 | } | |
546 | EXPORT_SYMBOL(iwl_mac_hw_scan); | |
547 | ||
afbdd69a WYG |
548 | /* |
549 | * internal short scan, this function should only been called while associated. | |
550 | * It will reset and tune the radio to prevent possible RF related problem | |
551 | */ | |
88be0264 | 552 | void iwl_internal_short_hw_scan(struct iwl_priv *priv) |
afbdd69a | 553 | { |
88be0264 JB |
554 | queue_work(priv->workqueue, &priv->start_internal_scan); |
555 | } | |
556 | ||
557 | static void iwl_bg_start_internal_scan(struct work_struct *work) | |
558 | { | |
559 | struct iwl_priv *priv = | |
560 | container_of(work, struct iwl_priv, start_internal_scan); | |
561 | ||
562 | mutex_lock(&priv->mutex); | |
afbdd69a WYG |
563 | |
564 | if (!iwl_is_ready_rf(priv)) { | |
afbdd69a | 565 | IWL_DEBUG_SCAN(priv, "not ready or exit pending\n"); |
88be0264 | 566 | goto unlock; |
afbdd69a | 567 | } |
88be0264 | 568 | |
afbdd69a WYG |
569 | if (test_bit(STATUS_SCANNING, &priv->status)) { |
570 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); | |
88be0264 | 571 | goto unlock; |
afbdd69a | 572 | } |
88be0264 | 573 | |
afbdd69a WYG |
574 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { |
575 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n"); | |
88be0264 | 576 | goto unlock; |
afbdd69a | 577 | } |
d4d59e88 | 578 | |
afbdd69a WYG |
579 | priv->scan_bands = 0; |
580 | if (priv->band == IEEE80211_BAND_5GHZ) | |
581 | priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ); | |
582 | else | |
583 | priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ); | |
584 | ||
585 | IWL_DEBUG_SCAN(priv, "Start internal short scan...\n"); | |
586 | set_bit(STATUS_SCANNING, &priv->status); | |
587 | priv->is_internal_short_scan = true; | |
588 | queue_work(priv->workqueue, &priv->request_scan); | |
88be0264 JB |
589 | unlock: |
590 | mutex_unlock(&priv->mutex); | |
afbdd69a WYG |
591 | } |
592 | EXPORT_SYMBOL(iwl_internal_short_hw_scan); | |
593 | ||
2a421b91 TW |
594 | #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) |
595 | ||
77fecfb8 | 596 | void iwl_bg_scan_check(struct work_struct *data) |
2a421b91 TW |
597 | { |
598 | struct iwl_priv *priv = | |
599 | container_of(data, struct iwl_priv, scan_check.work); | |
600 | ||
601 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
602 | return; | |
603 | ||
604 | mutex_lock(&priv->mutex); | |
605 | if (test_bit(STATUS_SCANNING, &priv->status) || | |
606 | test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 607 | IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting " |
2a421b91 TW |
608 | "adapter (%dms)\n", |
609 | jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); | |
610 | ||
611 | if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
612 | iwl_send_scan_abort(priv); | |
613 | } | |
614 | mutex_unlock(&priv->mutex); | |
615 | } | |
77fecfb8 SO |
616 | EXPORT_SYMBOL(iwl_bg_scan_check); |
617 | ||
2a421b91 TW |
618 | /** |
619 | * iwl_fill_probe_req - fill in all required fields and IE for probe request | |
620 | */ | |
f53696de | 621 | |
1ecf9fc1 JB |
622 | u16 iwl_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame, |
623 | const u8 *ies, int ie_len, int left) | |
2a421b91 TW |
624 | { |
625 | int len = 0; | |
626 | u8 *pos = NULL; | |
f53696de | 627 | |
2a421b91 TW |
628 | /* Make sure there is enough space for the probe request, |
629 | * two mandatory IEs and the data */ | |
630 | left -= 24; | |
631 | if (left < 0) | |
632 | return 0; | |
2a421b91 TW |
633 | |
634 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
635 | memcpy(frame->da, iwl_bcast_addr, ETH_ALEN); | |
636 | memcpy(frame->sa, priv->mac_addr, ETH_ALEN); | |
637 | memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN); | |
638 | frame->seq_ctrl = 0; | |
639 | ||
f53696de TW |
640 | len += 24; |
641 | ||
2a421b91 | 642 | /* ...next IE... */ |
f53696de | 643 | pos = &frame->u.probe_req.variable[0]; |
2a421b91 | 644 | |
f53696de | 645 | /* fill in our indirect SSID IE */ |
2a421b91 TW |
646 | left -= 2; |
647 | if (left < 0) | |
648 | return 0; | |
2a421b91 | 649 | *pos++ = WLAN_EID_SSID; |
1382c71c RC |
650 | *pos++ = 0; |
651 | ||
652 | len += 2; | |
2a421b91 | 653 | |
1ecf9fc1 JB |
654 | if (WARN_ON(left < ie_len)) |
655 | return len; | |
2a421b91 | 656 | |
afbdd69a WYG |
657 | if (ies) |
658 | memcpy(pos, ies, ie_len); | |
1ecf9fc1 JB |
659 | len += ie_len; |
660 | left -= ie_len; | |
f53696de | 661 | |
2a421b91 TW |
662 | return (u16)len; |
663 | } | |
77fecfb8 | 664 | EXPORT_SYMBOL(iwl_fill_probe_req); |
2a421b91 TW |
665 | |
666 | static void iwl_bg_request_scan(struct work_struct *data) | |
667 | { | |
668 | struct iwl_priv *priv = | |
669 | container_of(data, struct iwl_priv, request_scan); | |
670 | struct iwl_host_cmd cmd = { | |
671 | .id = REPLY_SCAN_CMD, | |
672 | .len = sizeof(struct iwl_scan_cmd), | |
c2acea8e | 673 | .flags = CMD_SIZE_HUGE, |
2a421b91 TW |
674 | }; |
675 | struct iwl_scan_cmd *scan; | |
676 | struct ieee80211_conf *conf = NULL; | |
f53696de | 677 | int ret = 0; |
76eff18b | 678 | u32 rate_flags = 0; |
2a421b91 | 679 | u16 cmd_len; |
fff7a434 | 680 | u16 rx_chain = 0; |
2a421b91 | 681 | enum ieee80211_band band; |
1ecf9fc1 | 682 | u8 n_probes = 0; |
fff7a434 | 683 | u8 rx_ant = priv->hw_params.valid_rx_ant; |
76eff18b | 684 | u8 rate; |
1ecf9fc1 | 685 | bool is_active = false; |
a2b0f02e | 686 | int chan_mod; |
f1e3d7d4 | 687 | u8 active_chains; |
2a421b91 TW |
688 | |
689 | conf = ieee80211_get_hw_conf(priv->hw); | |
690 | ||
691 | mutex_lock(&priv->mutex); | |
692 | ||
fbc9f97b RC |
693 | cancel_delayed_work(&priv->scan_check); |
694 | ||
2a421b91 | 695 | if (!iwl_is_ready(priv)) { |
39aadf8c | 696 | IWL_WARN(priv, "request scan called when driver not ready.\n"); |
2a421b91 TW |
697 | goto done; |
698 | } | |
699 | ||
a96a27f9 | 700 | /* Make sure the scan wasn't canceled before this queued work |
2a421b91 TW |
701 | * was given the chance to run... */ |
702 | if (!test_bit(STATUS_SCANNING, &priv->status)) | |
703 | goto done; | |
704 | ||
705 | /* This should never be called or scheduled if there is currently | |
706 | * a scan active in the hardware. */ | |
707 | if (test_bit(STATUS_SCAN_HW, &priv->status)) { | |
e1623446 | 708 | IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. " |
2a421b91 TW |
709 | "Ignoring second request.\n"); |
710 | ret = -EIO; | |
711 | goto done; | |
712 | } | |
713 | ||
714 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { | |
e1623446 | 715 | IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); |
2a421b91 TW |
716 | goto done; |
717 | } | |
718 | ||
719 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 720 | IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); |
2a421b91 TW |
721 | goto done; |
722 | } | |
723 | ||
724 | if (iwl_is_rfkill(priv)) { | |
e1623446 | 725 | IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); |
2a421b91 TW |
726 | goto done; |
727 | } | |
728 | ||
729 | if (!test_bit(STATUS_READY, &priv->status)) { | |
e1623446 | 730 | IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); |
2a421b91 TW |
731 | goto done; |
732 | } | |
733 | ||
734 | if (!priv->scan_bands) { | |
e1623446 | 735 | IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n"); |
2a421b91 TW |
736 | goto done; |
737 | } | |
738 | ||
739 | if (!priv->scan) { | |
740 | priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) + | |
741 | IWL_MAX_SCAN_SIZE, GFP_KERNEL); | |
742 | if (!priv->scan) { | |
743 | ret = -ENOMEM; | |
744 | goto done; | |
745 | } | |
746 | } | |
747 | scan = priv->scan; | |
748 | memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE); | |
749 | ||
750 | scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; | |
751 | scan->quiet_time = IWL_ACTIVE_QUIET_TIME; | |
752 | ||
753 | if (iwl_is_associated(priv)) { | |
754 | u16 interval = 0; | |
755 | u32 extra; | |
756 | u32 suspend_time = 100; | |
757 | u32 scan_suspend_time = 100; | |
758 | unsigned long flags; | |
759 | ||
e1623446 | 760 | IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); |
2a421b91 TW |
761 | spin_lock_irqsave(&priv->lock, flags); |
762 | interval = priv->beacon_int; | |
763 | spin_unlock_irqrestore(&priv->lock, flags); | |
764 | ||
765 | scan->suspend_time = 0; | |
766 | scan->max_out_time = cpu_to_le32(200 * 1024); | |
767 | if (!interval) | |
768 | interval = suspend_time; | |
769 | ||
770 | extra = (suspend_time / interval) << 22; | |
771 | scan_suspend_time = (extra | | |
772 | ((suspend_time % interval) * 1024)); | |
773 | scan->suspend_time = cpu_to_le32(scan_suspend_time); | |
e1623446 | 774 | IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", |
2a421b91 TW |
775 | scan_suspend_time, interval); |
776 | } | |
777 | ||
afbdd69a WYG |
778 | if (priv->is_internal_short_scan) { |
779 | IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); | |
780 | } else if (priv->scan_request->n_ssids) { | |
1382c71c | 781 | int i, p = 0; |
1ecf9fc1 | 782 | IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); |
1382c71c RC |
783 | for (i = 0; i < priv->scan_request->n_ssids; i++) { |
784 | /* always does wildcard anyway */ | |
785 | if (!priv->scan_request->ssids[i].ssid_len) | |
786 | continue; | |
787 | scan->direct_scan[p].id = WLAN_EID_SSID; | |
788 | scan->direct_scan[p].len = | |
789 | priv->scan_request->ssids[i].ssid_len; | |
790 | memcpy(scan->direct_scan[p].ssid, | |
791 | priv->scan_request->ssids[i].ssid, | |
792 | priv->scan_request->ssids[i].ssid_len); | |
793 | n_probes++; | |
794 | p++; | |
1ecf9fc1 JB |
795 | } |
796 | is_active = true; | |
797 | } else | |
798 | IWL_DEBUG_SCAN(priv, "Start passive scan.\n"); | |
2a421b91 TW |
799 | |
800 | scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; | |
801 | scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; | |
802 | scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
803 | ||
804 | ||
1b63ba8a | 805 | if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) { |
f53696de | 806 | band = IEEE80211_BAND_2GHZ; |
2a421b91 | 807 | scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; |
a2b0f02e WYG |
808 | chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK) |
809 | >> RXON_FLG_CHANNEL_MODE_POS; | |
810 | if (chan_mod == CHANNEL_MODE_PURE_40) { | |
76eff18b TW |
811 | rate = IWL_RATE_6M_PLCP; |
812 | } else { | |
813 | rate = IWL_RATE_1M_PLCP; | |
814 | rate_flags = RATE_MCS_CCK_MSK; | |
815 | } | |
2a421b91 | 816 | scan->good_CRC_th = 0; |
1b63ba8a | 817 | } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { |
f53696de | 818 | band = IEEE80211_BAND_5GHZ; |
76eff18b | 819 | rate = IWL_RATE_6M_PLCP; |
b097ad29 JB |
820 | /* |
821 | * If active scaning is requested but a certain channel | |
822 | * is marked passive, we can do active scanning if we | |
823 | * detect transmissions. | |
824 | */ | |
825 | scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0; | |
2a421b91 | 826 | |
f53696de TW |
827 | /* Force use of chains B and C (0x6) for scan Rx for 4965 |
828 | * Avoid A (0x1) because of its off-channel reception on A-band. | |
5118303f | 829 | */ |
f53696de | 830 | if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) |
fff7a434 | 831 | rx_ant = ANT_BC; |
1b63ba8a | 832 | } else { |
39aadf8c | 833 | IWL_WARN(priv, "Invalid scan band count\n"); |
2a421b91 TW |
834 | goto done; |
835 | } | |
836 | ||
76eff18b TW |
837 | priv->scan_tx_ant[band] = |
838 | iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]); | |
839 | rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); | |
840 | scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); | |
841 | ||
f1e3d7d4 SZ |
842 | /* In power save mode use one chain, otherwise use all chains */ |
843 | if (test_bit(STATUS_POWER_PMI, &priv->status)) { | |
844 | /* rx_ant has been set to all valid chains previously */ | |
845 | active_chains = rx_ant & | |
846 | ((u8)(priv->chain_noise_data.active_chains)); | |
847 | if (!active_chains) | |
848 | active_chains = rx_ant; | |
849 | ||
850 | IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n", | |
851 | priv->chain_noise_data.active_chains); | |
852 | ||
853 | rx_ant = first_antenna(active_chains); | |
854 | } | |
5118303f | 855 | /* MIMO is not used here, but value is required */ |
b23aa883 | 856 | rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; |
f1e3d7d4 | 857 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; |
fff7a434 WYG |
858 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; |
859 | rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; | |
860 | scan->rx_chain = cpu_to_le16(rx_chain); | |
afbdd69a WYG |
861 | if (!priv->is_internal_short_scan) { |
862 | cmd_len = iwl_fill_probe_req(priv, | |
863 | (struct ieee80211_mgmt *)scan->data, | |
864 | priv->scan_request->ie, | |
865 | priv->scan_request->ie_len, | |
866 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
867 | } else { | |
868 | cmd_len = iwl_fill_probe_req(priv, | |
869 | (struct ieee80211_mgmt *)scan->data, | |
870 | NULL, 0, | |
871 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
2a421b91 | 872 | |
afbdd69a | 873 | } |
2a421b91 | 874 | scan->tx_cmd.len = cpu_to_le16(cmd_len); |
279b05d4 | 875 | if (iwl_is_monitor_mode(priv)) |
2a421b91 TW |
876 | scan->filter_flags = RXON_FILTER_PROMISC_MSK; |
877 | ||
f53696de TW |
878 | scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | |
879 | RXON_FILTER_BCON_AWARE_MSK); | |
880 | ||
afbdd69a WYG |
881 | if (priv->is_internal_short_scan) { |
882 | scan->channel_count = | |
883 | iwl_get_single_channel_for_scan(priv, band, | |
884 | (void *)&scan->data[le16_to_cpu( | |
885 | scan->tx_cmd.len)]); | |
886 | } else { | |
887 | scan->channel_count = | |
888 | iwl_get_channels_for_scan(priv, band, | |
889 | is_active, n_probes, | |
890 | (void *)&scan->data[le16_to_cpu( | |
891 | scan->tx_cmd.len)]); | |
892 | } | |
f53696de | 893 | if (scan->channel_count == 0) { |
e1623446 | 894 | IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); |
f53696de TW |
895 | goto done; |
896 | } | |
2a421b91 | 897 | |
2a421b91 TW |
898 | cmd.len += le16_to_cpu(scan->tx_cmd.len) + |
899 | scan->channel_count * sizeof(struct iwl_scan_channel); | |
900 | cmd.data = scan; | |
901 | scan->len = cpu_to_le16(cmd.len); | |
902 | ||
903 | set_bit(STATUS_SCAN_HW, &priv->status); | |
904 | ret = iwl_send_cmd_sync(priv, &cmd); | |
905 | if (ret) | |
906 | goto done; | |
907 | ||
908 | queue_delayed_work(priv->workqueue, &priv->scan_check, | |
909 | IWL_SCAN_CHECK_WATCHDOG); | |
910 | ||
911 | mutex_unlock(&priv->mutex); | |
912 | return; | |
913 | ||
914 | done: | |
951891c7 MA |
915 | /* Cannot perform scan. Make sure we clear scanning |
916 | * bits from status so next scan request can be performed. | |
917 | * If we don't clear scanning status bit here all next scan | |
918 | * will fail | |
919 | */ | |
920 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
921 | clear_bit(STATUS_SCANNING, &priv->status); | |
2a421b91 TW |
922 | /* inform mac80211 scan aborted */ |
923 | queue_work(priv->workqueue, &priv->scan_completed); | |
924 | mutex_unlock(&priv->mutex); | |
925 | } | |
926 | ||
77fecfb8 | 927 | void iwl_bg_abort_scan(struct work_struct *work) |
2a421b91 TW |
928 | { |
929 | struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); | |
930 | ||
5bddf549 WYG |
931 | if (!test_bit(STATUS_READY, &priv->status) || |
932 | !test_bit(STATUS_GEO_CONFIGURED, &priv->status)) | |
2a421b91 TW |
933 | return; |
934 | ||
935 | mutex_lock(&priv->mutex); | |
936 | ||
937 | set_bit(STATUS_SCAN_ABORTING, &priv->status); | |
938 | iwl_send_scan_abort(priv); | |
939 | ||
940 | mutex_unlock(&priv->mutex); | |
941 | } | |
77fecfb8 | 942 | EXPORT_SYMBOL(iwl_bg_abort_scan); |
2a421b91 | 943 | |
77fecfb8 | 944 | void iwl_bg_scan_completed(struct work_struct *work) |
eedda367 TW |
945 | { |
946 | struct iwl_priv *priv = | |
947 | container_of(work, struct iwl_priv, scan_completed); | |
948 | ||
e1623446 | 949 | IWL_DEBUG_SCAN(priv, "SCAN complete scan\n"); |
eedda367 | 950 | |
fbc9f97b RC |
951 | cancel_delayed_work(&priv->scan_check); |
952 | ||
afbdd69a WYG |
953 | if (!priv->is_internal_short_scan) |
954 | ieee80211_scan_completed(priv->hw, false); | |
955 | else { | |
956 | priv->is_internal_short_scan = false; | |
957 | IWL_DEBUG_SCAN(priv, "internal short scan completed\n"); | |
958 | } | |
74aa9be0 | 959 | |
eedda367 TW |
960 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
961 | return; | |
962 | ||
eedda367 TW |
963 | /* Since setting the TXPOWER may have been deferred while |
964 | * performing the scan, fire one off */ | |
965 | mutex_lock(&priv->mutex); | |
966 | iwl_set_tx_power(priv, priv->tx_power_user_lmt, true); | |
967 | mutex_unlock(&priv->mutex); | |
968 | } | |
77fecfb8 | 969 | EXPORT_SYMBOL(iwl_bg_scan_completed); |
eedda367 | 970 | |
2a421b91 TW |
971 | void iwl_setup_scan_deferred_work(struct iwl_priv *priv) |
972 | { | |
eedda367 | 973 | INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); |
2a421b91 TW |
974 | INIT_WORK(&priv->request_scan, iwl_bg_request_scan); |
975 | INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); | |
88be0264 | 976 | INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan); |
2a421b91 TW |
977 | INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); |
978 | } | |
979 | EXPORT_SYMBOL(iwl_setup_scan_deferred_work); | |
980 |