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2a421b91 TW |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
01f8162a | 5 | * Copyright(c) 2008 - 2009 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 JL |
30 | #include <net/lib80211.h> |
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 | ||
17f841cd | 112 | int iwl_send_scan_abort(struct iwl_priv *priv) |
2a421b91 TW |
113 | { |
114 | int ret = 0; | |
115 | struct iwl_rx_packet *res; | |
116 | struct iwl_host_cmd cmd = { | |
117 | .id = REPLY_SCAN_ABORT_CMD, | |
118 | .meta.flags = CMD_WANT_SKB, | |
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 | ||
135 | res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; | |
136 | if (res->u.status != CAN_ABORT_STATUS) { | |
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. */ | |
e1623446 | 143 | IWL_DEBUG_INFO(priv, "SCAN_ABORT returned %d.\n", res->u.status); |
2a421b91 TW |
144 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
145 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
146 | } | |
147 | ||
14652562 | 148 | priv->alloc_rxb_skb--; |
2a421b91 TW |
149 | dev_kfree_skb_any(cmd.meta.u.skb); |
150 | ||
151 | return ret; | |
152 | } | |
17f841cd | 153 | EXPORT_SYMBOL(iwl_send_scan_abort); |
2a421b91 TW |
154 | |
155 | /* Service response to REPLY_SCAN_CMD (0x80) */ | |
156 | static void iwl_rx_reply_scan(struct iwl_priv *priv, | |
157 | struct iwl_rx_mem_buffer *rxb) | |
158 | { | |
159 | #ifdef CONFIG_IWLWIFI_DEBUG | |
160 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; | |
161 | struct iwl_scanreq_notification *notif = | |
162 | (struct iwl_scanreq_notification *)pkt->u.raw; | |
163 | ||
e1623446 | 164 | IWL_DEBUG_RX(priv, "Scan request status = 0x%x\n", notif->status); |
2a421b91 TW |
165 | #endif |
166 | } | |
167 | ||
168 | /* Service SCAN_START_NOTIFICATION (0x82) */ | |
169 | static void iwl_rx_scan_start_notif(struct iwl_priv *priv, | |
170 | struct iwl_rx_mem_buffer *rxb) | |
171 | { | |
172 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; | |
173 | struct iwl_scanstart_notification *notif = | |
174 | (struct iwl_scanstart_notification *)pkt->u.raw; | |
175 | priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); | |
e1623446 | 176 | IWL_DEBUG_SCAN(priv, "Scan start: " |
2a421b91 TW |
177 | "%d [802.11%s] " |
178 | "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", | |
179 | notif->channel, | |
180 | notif->band ? "bg" : "a", | |
fe905f1d TW |
181 | le32_to_cpu(notif->tsf_high), |
182 | le32_to_cpu(notif->tsf_low), | |
183 | notif->status, notif->beacon_timer); | |
2a421b91 TW |
184 | } |
185 | ||
186 | /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ | |
187 | static void iwl_rx_scan_results_notif(struct iwl_priv *priv, | |
188 | struct iwl_rx_mem_buffer *rxb) | |
189 | { | |
190 | #ifdef CONFIG_IWLWIFI_DEBUG | |
191 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; | |
192 | struct iwl_scanresults_notification *notif = | |
193 | (struct iwl_scanresults_notification *)pkt->u.raw; | |
194 | ||
e1623446 | 195 | IWL_DEBUG_SCAN(priv, "Scan ch.res: " |
2a421b91 TW |
196 | "%d [802.11%s] " |
197 | "(TSF: 0x%08X:%08X) - %d " | |
198 | "elapsed=%lu usec (%dms since last)\n", | |
199 | notif->channel, | |
200 | notif->band ? "bg" : "a", | |
201 | le32_to_cpu(notif->tsf_high), | |
202 | le32_to_cpu(notif->tsf_low), | |
203 | le32_to_cpu(notif->statistics[0]), | |
204 | le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf, | |
205 | jiffies_to_msecs(elapsed_jiffies | |
206 | (priv->last_scan_jiffies, jiffies))); | |
207 | #endif | |
208 | ||
209 | priv->last_scan_jiffies = jiffies; | |
210 | priv->next_scan_jiffies = 0; | |
211 | } | |
212 | ||
213 | /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ | |
214 | static void iwl_rx_scan_complete_notif(struct iwl_priv *priv, | |
215 | struct iwl_rx_mem_buffer *rxb) | |
216 | { | |
cb9289cb | 217 | #ifdef CONFIG_IWLWIFI_DEBUG |
2a421b91 TW |
218 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
219 | struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw; | |
220 | ||
e1623446 | 221 | IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", |
2a421b91 TW |
222 | scan_notif->scanned_channels, |
223 | scan_notif->tsf_low, | |
224 | scan_notif->tsf_high, scan_notif->status); | |
cb9289cb | 225 | #endif |
2a421b91 TW |
226 | |
227 | /* The HW is no longer scanning */ | |
228 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
229 | ||
e1623446 | 230 | IWL_DEBUG_INFO(priv, "Scan pass on %sGHz took %dms\n", |
1b63ba8a DM |
231 | (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ? |
232 | "2.4" : "5.2", | |
2a421b91 TW |
233 | jiffies_to_msecs(elapsed_jiffies |
234 | (priv->scan_pass_start, jiffies))); | |
235 | ||
1b63ba8a DM |
236 | /* Remove this scanned band from the list of pending |
237 | * bands to scan, band G precedes A in order of scanning | |
238 | * as seen in iwl_bg_request_scan */ | |
239 | if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) | |
240 | priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ); | |
241 | else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) | |
242 | priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ); | |
2a421b91 TW |
243 | |
244 | /* If a request to abort was given, or the scan did not succeed | |
245 | * then we reset the scan state machine and terminate, | |
246 | * re-queuing another scan if one has been requested */ | |
247 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 248 | IWL_DEBUG_INFO(priv, "Aborted scan completed.\n"); |
2a421b91 TW |
249 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
250 | } else { | |
251 | /* If there are more bands on this scan pass reschedule */ | |
1b63ba8a | 252 | if (priv->scan_bands) |
2a421b91 TW |
253 | goto reschedule; |
254 | } | |
255 | ||
256 | priv->last_scan_jiffies = jiffies; | |
257 | priv->next_scan_jiffies = 0; | |
e1623446 | 258 | IWL_DEBUG_INFO(priv, "Setting scan to off\n"); |
2a421b91 TW |
259 | |
260 | clear_bit(STATUS_SCANNING, &priv->status); | |
261 | ||
e1623446 | 262 | IWL_DEBUG_INFO(priv, "Scan took %dms\n", |
2a421b91 TW |
263 | jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies))); |
264 | ||
265 | queue_work(priv->workqueue, &priv->scan_completed); | |
266 | ||
267 | return; | |
268 | ||
269 | reschedule: | |
270 | priv->scan_pass_start = jiffies; | |
271 | queue_work(priv->workqueue, &priv->request_scan); | |
272 | } | |
273 | ||
274 | void iwl_setup_rx_scan_handlers(struct iwl_priv *priv) | |
275 | { | |
276 | /* scan handlers */ | |
277 | priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan; | |
278 | priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif; | |
279 | priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = | |
280 | iwl_rx_scan_results_notif; | |
281 | priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = | |
282 | iwl_rx_scan_complete_notif; | |
283 | } | |
284 | EXPORT_SYMBOL(iwl_setup_rx_scan_handlers); | |
285 | ||
77fecfb8 SO |
286 | inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, |
287 | enum ieee80211_band band, | |
288 | u8 n_probes) | |
2a421b91 TW |
289 | { |
290 | if (band == IEEE80211_BAND_5GHZ) | |
fe905f1d TW |
291 | return IWL_ACTIVE_DWELL_TIME_52 + |
292 | IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); | |
2a421b91 | 293 | else |
fe905f1d TW |
294 | return IWL_ACTIVE_DWELL_TIME_24 + |
295 | IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); | |
2a421b91 | 296 | } |
77fecfb8 | 297 | EXPORT_SYMBOL(iwl_get_active_dwell_time); |
2a421b91 | 298 | |
77fecfb8 SO |
299 | u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, |
300 | enum ieee80211_band band) | |
2a421b91 | 301 | { |
fe905f1d | 302 | u16 passive = (band == IEEE80211_BAND_2GHZ) ? |
2a421b91 TW |
303 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : |
304 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; | |
305 | ||
306 | if (iwl_is_associated(priv)) { | |
307 | /* If we're associated, we clamp the maximum passive | |
308 | * dwell time to be 98% of the beacon interval (minus | |
309 | * 2 * channel tune time) */ | |
310 | passive = priv->beacon_int; | |
311 | if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) | |
312 | passive = IWL_PASSIVE_DWELL_BASE; | |
313 | passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; | |
314 | } | |
315 | ||
2a421b91 TW |
316 | return passive; |
317 | } | |
77fecfb8 | 318 | EXPORT_SYMBOL(iwl_get_passive_dwell_time); |
2a421b91 TW |
319 | |
320 | static int iwl_get_channels_for_scan(struct iwl_priv *priv, | |
321 | enum ieee80211_band band, | |
fe905f1d | 322 | u8 is_active, u8 n_probes, |
2a421b91 TW |
323 | struct iwl_scan_channel *scan_ch) |
324 | { | |
325 | const struct ieee80211_channel *channels = NULL; | |
326 | const struct ieee80211_supported_band *sband; | |
327 | const struct iwl_channel_info *ch_info; | |
328 | u16 passive_dwell = 0; | |
329 | u16 active_dwell = 0; | |
330 | int added, i; | |
d16dc48a | 331 | u16 channel; |
2a421b91 TW |
332 | |
333 | sband = iwl_get_hw_mode(priv, band); | |
334 | if (!sband) | |
335 | return 0; | |
336 | ||
337 | channels = sband->channels; | |
338 | ||
fe905f1d | 339 | active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); |
2a421b91 TW |
340 | passive_dwell = iwl_get_passive_dwell_time(priv, band); |
341 | ||
fe905f1d TW |
342 | if (passive_dwell <= active_dwell) |
343 | passive_dwell = active_dwell + 1; | |
344 | ||
2a421b91 TW |
345 | for (i = 0, added = 0; i < sband->n_channels; i++) { |
346 | if (channels[i].flags & IEEE80211_CHAN_DISABLED) | |
347 | continue; | |
348 | ||
d16dc48a | 349 | channel = |
2a421b91 | 350 | ieee80211_frequency_to_channel(channels[i].center_freq); |
d16dc48a | 351 | scan_ch->channel = cpu_to_le16(channel); |
2a421b91 | 352 | |
d16dc48a | 353 | ch_info = iwl_get_channel_info(priv, band, channel); |
2a421b91 | 354 | if (!is_channel_valid(ch_info)) { |
e1623446 | 355 | IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", |
d16dc48a | 356 | channel); |
2a421b91 TW |
357 | continue; |
358 | } | |
359 | ||
360 | if (!is_active || is_channel_passive(ch_info) || | |
361 | (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) | |
d16dc48a | 362 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; |
2a421b91 | 363 | else |
d16dc48a | 364 | scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; |
2a421b91 | 365 | |
0ffe014a | 366 | if (n_probes) |
fe905f1d | 367 | scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); |
2a421b91 TW |
368 | |
369 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
370 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
371 | ||
372 | /* Set txpower levels to defaults */ | |
f53696de | 373 | scan_ch->dsp_atten = 110; |
2a421b91 | 374 | |
fe905f1d TW |
375 | /* NOTE: if we were doing 6Mb OFDM for scans we'd use |
376 | * power level: | |
377 | * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; | |
378 | */ | |
2a421b91 | 379 | if (band == IEEE80211_BAND_5GHZ) |
f53696de | 380 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; |
fe905f1d | 381 | else |
f53696de | 382 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); |
2a421b91 | 383 | |
e1623446 | 384 | IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", |
fe905f1d | 385 | channel, le32_to_cpu(scan_ch->type), |
d16dc48a TW |
386 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? |
387 | "ACTIVE" : "PASSIVE", | |
388 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
2a421b91 TW |
389 | active_dwell : passive_dwell); |
390 | ||
391 | scan_ch++; | |
392 | added++; | |
393 | } | |
394 | ||
e1623446 | 395 | IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added); |
2a421b91 TW |
396 | return added; |
397 | } | |
398 | ||
f53696de TW |
399 | void iwl_init_scan_params(struct iwl_priv *priv) |
400 | { | |
76eff18b | 401 | u8 ant_idx = fls(priv->hw_params.valid_tx_ant) - 1; |
f53696de | 402 | if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ]) |
76eff18b | 403 | priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; |
f53696de | 404 | if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ]) |
76eff18b | 405 | priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; |
f53696de TW |
406 | } |
407 | ||
2a421b91 TW |
408 | int iwl_scan_initiate(struct iwl_priv *priv) |
409 | { | |
2a421b91 | 410 | if (!iwl_is_ready_rf(priv)) { |
e1623446 | 411 | IWL_DEBUG_SCAN(priv, "Aborting scan due to not ready.\n"); |
2a421b91 TW |
412 | return -EIO; |
413 | } | |
414 | ||
415 | if (test_bit(STATUS_SCANNING, &priv->status)) { | |
e1623446 | 416 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); |
2a421b91 TW |
417 | return -EAGAIN; |
418 | } | |
419 | ||
420 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 421 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n"); |
2a421b91 TW |
422 | return -EAGAIN; |
423 | } | |
424 | ||
e1623446 | 425 | IWL_DEBUG_INFO(priv, "Starting scan...\n"); |
1b63ba8a DM |
426 | if (priv->cfg->sku & IWL_SKU_G) |
427 | priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ); | |
428 | if (priv->cfg->sku & IWL_SKU_A) | |
429 | priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ); | |
2a421b91 TW |
430 | set_bit(STATUS_SCANNING, &priv->status); |
431 | priv->scan_start = jiffies; | |
432 | priv->scan_pass_start = priv->scan_start; | |
433 | ||
434 | queue_work(priv->workqueue, &priv->request_scan); | |
435 | ||
436 | return 0; | |
437 | } | |
438 | EXPORT_SYMBOL(iwl_scan_initiate); | |
439 | ||
e9dde6f6 AK |
440 | #define IWL_DELAY_NEXT_SCAN (HZ*2) |
441 | ||
442 | int iwl_mac_hw_scan(struct ieee80211_hw *hw, | |
443 | struct cfg80211_scan_request *req) | |
444 | { | |
445 | unsigned long flags; | |
446 | struct iwl_priv *priv = hw->priv; | |
447 | int ret; | |
448 | u8 *ssid = NULL; | |
449 | size_t ssid_len = 0; | |
450 | ||
451 | if (req->n_ssids) { | |
452 | ssid = req->ssids[0].ssid; | |
453 | ssid_len = req->ssids[0].ssid_len; | |
454 | } | |
455 | ||
456 | IWL_DEBUG_MAC80211(priv, "enter\n"); | |
457 | ||
458 | mutex_lock(&priv->mutex); | |
459 | spin_lock_irqsave(&priv->lock, flags); | |
460 | ||
461 | if (!iwl_is_ready_rf(priv)) { | |
462 | ret = -EIO; | |
463 | IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n"); | |
464 | goto out_unlock; | |
465 | } | |
466 | ||
467 | /* We don't schedule scan within next_scan_jiffies period. | |
468 | * Avoid scanning during possible EAPOL exchange, return | |
469 | * success immediately. | |
470 | */ | |
471 | if (priv->next_scan_jiffies && | |
472 | time_after(priv->next_scan_jiffies, jiffies)) { | |
473 | IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n"); | |
474 | queue_work(priv->workqueue, &priv->scan_completed); | |
475 | ret = 0; | |
476 | goto out_unlock; | |
477 | } | |
478 | ||
479 | /* if we just finished scan ask for delay */ | |
480 | if (iwl_is_associated(priv) && priv->last_scan_jiffies && | |
481 | time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) { | |
482 | IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n"); | |
483 | queue_work(priv->workqueue, &priv->scan_completed); | |
484 | ret = 0; | |
485 | goto out_unlock; | |
486 | } | |
487 | ||
488 | if (ssid_len) { | |
489 | priv->one_direct_scan = 1; | |
490 | priv->direct_ssid_len = ssid_len; | |
491 | memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); | |
492 | } else { | |
493 | priv->one_direct_scan = 0; | |
494 | } | |
495 | ||
496 | ret = iwl_scan_initiate(priv); | |
497 | ||
498 | IWL_DEBUG_MAC80211(priv, "leave\n"); | |
499 | ||
500 | out_unlock: | |
501 | spin_unlock_irqrestore(&priv->lock, flags); | |
502 | mutex_unlock(&priv->mutex); | |
503 | ||
504 | return ret; | |
505 | } | |
506 | EXPORT_SYMBOL(iwl_mac_hw_scan); | |
507 | ||
2a421b91 TW |
508 | #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) |
509 | ||
77fecfb8 | 510 | void iwl_bg_scan_check(struct work_struct *data) |
2a421b91 TW |
511 | { |
512 | struct iwl_priv *priv = | |
513 | container_of(data, struct iwl_priv, scan_check.work); | |
514 | ||
515 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
516 | return; | |
517 | ||
518 | mutex_lock(&priv->mutex); | |
519 | if (test_bit(STATUS_SCANNING, &priv->status) || | |
520 | test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 521 | IWL_DEBUG_SCAN(priv, "Scan completion watchdog resetting " |
2a421b91 TW |
522 | "adapter (%dms)\n", |
523 | jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); | |
524 | ||
525 | if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
526 | iwl_send_scan_abort(priv); | |
527 | } | |
528 | mutex_unlock(&priv->mutex); | |
529 | } | |
77fecfb8 SO |
530 | EXPORT_SYMBOL(iwl_bg_scan_check); |
531 | ||
2a421b91 TW |
532 | /** |
533 | * iwl_supported_rate_to_ie - fill in the supported rate in IE field | |
534 | * | |
535 | * return : set the bit for each supported rate insert in ie | |
536 | */ | |
537 | static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate, | |
538 | u16 basic_rate, int *left) | |
539 | { | |
540 | u16 ret_rates = 0, bit; | |
541 | int i; | |
542 | u8 *cnt = ie; | |
543 | u8 *rates = ie + 1; | |
544 | ||
545 | for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) { | |
546 | if (bit & supported_rate) { | |
547 | ret_rates |= bit; | |
548 | rates[*cnt] = iwl_rates[i].ieee | | |
549 | ((bit & basic_rate) ? 0x80 : 0x00); | |
550 | (*cnt)++; | |
551 | (*left)--; | |
552 | if ((*left <= 0) || | |
553 | (*cnt >= IWL_SUPPORTED_RATES_IE_LEN)) | |
554 | break; | |
555 | } | |
556 | } | |
557 | ||
558 | return ret_rates; | |
559 | } | |
560 | ||
561 | ||
562 | static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband, | |
f53696de | 563 | u8 *pos, int *left) |
2a421b91 TW |
564 | { |
565 | struct ieee80211_ht_cap *ht_cap; | |
566 | ||
d9fe60de | 567 | if (!sband || !sband->ht_cap.ht_supported) |
2a421b91 TW |
568 | return; |
569 | ||
570 | if (*left < sizeof(struct ieee80211_ht_cap)) | |
571 | return; | |
572 | ||
573 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
574 | ht_cap = (struct ieee80211_ht_cap *) pos; | |
575 | ||
d9fe60de JB |
576 | ht_cap->cap_info = cpu_to_le16(sband->ht_cap.cap); |
577 | memcpy(&ht_cap->mcs, &sband->ht_cap.mcs, 16); | |
2a421b91 | 578 | ht_cap->ampdu_params_info = |
d9fe60de JB |
579 | (sband->ht_cap.ampdu_factor & IEEE80211_HT_AMPDU_PARM_FACTOR) | |
580 | ((sband->ht_cap.ampdu_density << 2) & | |
581 | IEEE80211_HT_AMPDU_PARM_DENSITY); | |
2a421b91 TW |
582 | *left -= sizeof(struct ieee80211_ht_cap); |
583 | } | |
584 | ||
585 | /** | |
586 | * iwl_fill_probe_req - fill in all required fields and IE for probe request | |
587 | */ | |
f53696de | 588 | |
77fecfb8 SO |
589 | u16 iwl_fill_probe_req(struct iwl_priv *priv, |
590 | enum ieee80211_band band, | |
591 | struct ieee80211_mgmt *frame, | |
592 | int left) | |
2a421b91 TW |
593 | { |
594 | int len = 0; | |
595 | u8 *pos = NULL; | |
596 | u16 active_rates, ret_rates, cck_rates, active_rate_basic; | |
597 | const struct ieee80211_supported_band *sband = | |
598 | iwl_get_hw_mode(priv, band); | |
599 | ||
f53696de | 600 | |
2a421b91 TW |
601 | /* Make sure there is enough space for the probe request, |
602 | * two mandatory IEs and the data */ | |
603 | left -= 24; | |
604 | if (left < 0) | |
605 | return 0; | |
2a421b91 TW |
606 | |
607 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
608 | memcpy(frame->da, iwl_bcast_addr, ETH_ALEN); | |
609 | memcpy(frame->sa, priv->mac_addr, ETH_ALEN); | |
610 | memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN); | |
611 | frame->seq_ctrl = 0; | |
612 | ||
f53696de TW |
613 | len += 24; |
614 | ||
2a421b91 | 615 | /* ...next IE... */ |
f53696de | 616 | pos = &frame->u.probe_req.variable[0]; |
2a421b91 | 617 | |
f53696de | 618 | /* fill in our indirect SSID IE */ |
2a421b91 TW |
619 | left -= 2; |
620 | if (left < 0) | |
621 | return 0; | |
2a421b91 TW |
622 | *pos++ = WLAN_EID_SSID; |
623 | *pos++ = 0; | |
624 | ||
f53696de | 625 | len += 2; |
2a421b91 TW |
626 | |
627 | /* fill in supported rate */ | |
2a421b91 TW |
628 | left -= 2; |
629 | if (left < 0) | |
630 | return 0; | |
631 | ||
2a421b91 TW |
632 | *pos++ = WLAN_EID_SUPP_RATES; |
633 | *pos = 0; | |
634 | ||
635 | /* exclude 60M rate */ | |
636 | active_rates = priv->rates_mask; | |
637 | active_rates &= ~IWL_RATE_60M_MASK; | |
638 | ||
639 | active_rate_basic = active_rates & IWL_BASIC_RATES_MASK; | |
640 | ||
641 | cck_rates = IWL_CCK_RATES_MASK & active_rates; | |
642 | ret_rates = iwl_supported_rate_to_ie(pos, cck_rates, | |
f53696de | 643 | active_rate_basic, &left); |
2a421b91 TW |
644 | active_rates &= ~ret_rates; |
645 | ||
646 | ret_rates = iwl_supported_rate_to_ie(pos, active_rates, | |
f53696de | 647 | active_rate_basic, &left); |
2a421b91 TW |
648 | active_rates &= ~ret_rates; |
649 | ||
650 | len += 2 + *pos; | |
651 | pos += (*pos) + 1; | |
f53696de | 652 | |
2a421b91 TW |
653 | if (active_rates == 0) |
654 | goto fill_end; | |
655 | ||
656 | /* fill in supported extended rate */ | |
657 | /* ...next IE... */ | |
658 | left -= 2; | |
659 | if (left < 0) | |
660 | return 0; | |
661 | /* ... fill it in... */ | |
662 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
663 | *pos = 0; | |
f53696de TW |
664 | iwl_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left); |
665 | if (*pos > 0) { | |
2a421b91 | 666 | len += 2 + *pos; |
f53696de TW |
667 | pos += (*pos) + 1; |
668 | } else { | |
669 | pos--; | |
670 | } | |
2a421b91 TW |
671 | |
672 | fill_end: | |
f53696de | 673 | |
2a421b91 TW |
674 | left -= 2; |
675 | if (left < 0) | |
676 | return 0; | |
677 | ||
678 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
679 | *pos = 0; | |
2a421b91 | 680 | iwl_ht_cap_to_ie(sband, pos, &left); |
2a421b91 TW |
681 | if (*pos > 0) |
682 | len += 2 + *pos; | |
f53696de | 683 | |
2a421b91 TW |
684 | return (u16)len; |
685 | } | |
77fecfb8 | 686 | EXPORT_SYMBOL(iwl_fill_probe_req); |
2a421b91 TW |
687 | |
688 | static void iwl_bg_request_scan(struct work_struct *data) | |
689 | { | |
690 | struct iwl_priv *priv = | |
691 | container_of(data, struct iwl_priv, request_scan); | |
692 | struct iwl_host_cmd cmd = { | |
693 | .id = REPLY_SCAN_CMD, | |
694 | .len = sizeof(struct iwl_scan_cmd), | |
695 | .meta.flags = CMD_SIZE_HUGE, | |
696 | }; | |
697 | struct iwl_scan_cmd *scan; | |
698 | struct ieee80211_conf *conf = NULL; | |
f53696de | 699 | int ret = 0; |
76eff18b | 700 | u32 rate_flags = 0; |
2a421b91 TW |
701 | u16 cmd_len; |
702 | enum ieee80211_band band; | |
fe905f1d | 703 | u8 n_probes = 2; |
d588be6b | 704 | u8 rx_chain = priv->hw_params.valid_rx_ant; |
76eff18b | 705 | u8 rate; |
9387b7ca | 706 | DECLARE_SSID_BUF(ssid); |
2a421b91 TW |
707 | |
708 | conf = ieee80211_get_hw_conf(priv->hw); | |
709 | ||
710 | mutex_lock(&priv->mutex); | |
711 | ||
fbc9f97b RC |
712 | cancel_delayed_work(&priv->scan_check); |
713 | ||
2a421b91 | 714 | if (!iwl_is_ready(priv)) { |
39aadf8c | 715 | IWL_WARN(priv, "request scan called when driver not ready.\n"); |
2a421b91 TW |
716 | goto done; |
717 | } | |
718 | ||
a96a27f9 | 719 | /* Make sure the scan wasn't canceled before this queued work |
2a421b91 TW |
720 | * was given the chance to run... */ |
721 | if (!test_bit(STATUS_SCANNING, &priv->status)) | |
722 | goto done; | |
723 | ||
724 | /* This should never be called or scheduled if there is currently | |
725 | * a scan active in the hardware. */ | |
726 | if (test_bit(STATUS_SCAN_HW, &priv->status)) { | |
e1623446 | 727 | IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. " |
2a421b91 TW |
728 | "Ignoring second request.\n"); |
729 | ret = -EIO; | |
730 | goto done; | |
731 | } | |
732 | ||
733 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { | |
e1623446 | 734 | IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); |
2a421b91 TW |
735 | goto done; |
736 | } | |
737 | ||
738 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
e1623446 | 739 | IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); |
2a421b91 TW |
740 | goto done; |
741 | } | |
742 | ||
743 | if (iwl_is_rfkill(priv)) { | |
e1623446 | 744 | IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); |
2a421b91 TW |
745 | goto done; |
746 | } | |
747 | ||
748 | if (!test_bit(STATUS_READY, &priv->status)) { | |
e1623446 | 749 | IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); |
2a421b91 TW |
750 | goto done; |
751 | } | |
752 | ||
753 | if (!priv->scan_bands) { | |
e1623446 | 754 | IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n"); |
2a421b91 TW |
755 | goto done; |
756 | } | |
757 | ||
758 | if (!priv->scan) { | |
759 | priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) + | |
760 | IWL_MAX_SCAN_SIZE, GFP_KERNEL); | |
761 | if (!priv->scan) { | |
762 | ret = -ENOMEM; | |
763 | goto done; | |
764 | } | |
765 | } | |
766 | scan = priv->scan; | |
767 | memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE); | |
768 | ||
769 | scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; | |
770 | scan->quiet_time = IWL_ACTIVE_QUIET_TIME; | |
771 | ||
772 | if (iwl_is_associated(priv)) { | |
773 | u16 interval = 0; | |
774 | u32 extra; | |
775 | u32 suspend_time = 100; | |
776 | u32 scan_suspend_time = 100; | |
777 | unsigned long flags; | |
778 | ||
e1623446 | 779 | IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); |
2a421b91 TW |
780 | |
781 | spin_lock_irqsave(&priv->lock, flags); | |
782 | interval = priv->beacon_int; | |
783 | spin_unlock_irqrestore(&priv->lock, flags); | |
784 | ||
785 | scan->suspend_time = 0; | |
786 | scan->max_out_time = cpu_to_le32(200 * 1024); | |
787 | if (!interval) | |
788 | interval = suspend_time; | |
789 | ||
790 | extra = (suspend_time / interval) << 22; | |
791 | scan_suspend_time = (extra | | |
792 | ((suspend_time % interval) * 1024)); | |
793 | scan->suspend_time = cpu_to_le32(scan_suspend_time); | |
e1623446 | 794 | IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", |
2a421b91 TW |
795 | scan_suspend_time, interval); |
796 | } | |
797 | ||
798 | /* We should add the ability for user to lock to PASSIVE ONLY */ | |
799 | if (priv->one_direct_scan) { | |
e1623446 | 800 | IWL_DEBUG_SCAN(priv, "Start direct scan for '%s'\n", |
9387b7ca JL |
801 | print_ssid(ssid, priv->direct_ssid, |
802 | priv->direct_ssid_len)); | |
2a421b91 TW |
803 | scan->direct_scan[0].id = WLAN_EID_SSID; |
804 | scan->direct_scan[0].len = priv->direct_ssid_len; | |
805 | memcpy(scan->direct_scan[0].ssid, | |
806 | priv->direct_ssid, priv->direct_ssid_len); | |
fe905f1d | 807 | n_probes++; |
2a421b91 | 808 | } else { |
e1623446 | 809 | IWL_DEBUG_SCAN(priv, "Start indirect scan.\n"); |
2a421b91 TW |
810 | } |
811 | ||
812 | scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; | |
813 | scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; | |
814 | scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
815 | ||
816 | ||
1b63ba8a | 817 | if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) { |
f53696de | 818 | band = IEEE80211_BAND_2GHZ; |
2a421b91 | 819 | scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; |
76eff18b TW |
820 | if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) { |
821 | rate = IWL_RATE_6M_PLCP; | |
822 | } else { | |
823 | rate = IWL_RATE_1M_PLCP; | |
824 | rate_flags = RATE_MCS_CCK_MSK; | |
825 | } | |
2a421b91 | 826 | scan->good_CRC_th = 0; |
1b63ba8a | 827 | } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { |
f53696de | 828 | band = IEEE80211_BAND_5GHZ; |
76eff18b | 829 | rate = IWL_RATE_6M_PLCP; |
2a421b91 | 830 | scan->good_CRC_th = IWL_GOOD_CRC_TH; |
2a421b91 | 831 | |
f53696de TW |
832 | /* Force use of chains B and C (0x6) for scan Rx for 4965 |
833 | * Avoid A (0x1) because of its off-channel reception on A-band. | |
5118303f | 834 | */ |
f53696de TW |
835 | if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) |
836 | rx_chain = 0x6; | |
1b63ba8a | 837 | } else { |
39aadf8c | 838 | IWL_WARN(priv, "Invalid scan band count\n"); |
2a421b91 TW |
839 | goto done; |
840 | } | |
841 | ||
76eff18b TW |
842 | priv->scan_tx_ant[band] = |
843 | iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]); | |
844 | rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); | |
845 | scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); | |
846 | ||
5118303f | 847 | /* MIMO is not used here, but value is required */ |
f53696de TW |
848 | scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK | |
849 | cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) | | |
850 | (rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) | | |
851 | (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS)); | |
852 | ||
2a421b91 | 853 | cmd_len = iwl_fill_probe_req(priv, band, |
f53696de TW |
854 | (struct ieee80211_mgmt *)scan->data, |
855 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
2a421b91 TW |
856 | |
857 | scan->tx_cmd.len = cpu_to_le16(cmd_len); | |
2a421b91 | 858 | |
05c914fe | 859 | if (priv->iw_mode == NL80211_IFTYPE_MONITOR) |
2a421b91 TW |
860 | scan->filter_flags = RXON_FILTER_PROMISC_MSK; |
861 | ||
f53696de TW |
862 | scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | |
863 | RXON_FILTER_BCON_AWARE_MSK); | |
864 | ||
fe905f1d TW |
865 | scan->channel_count = |
866 | iwl_get_channels_for_scan(priv, band, 1, /* active */ | |
867 | n_probes, | |
868 | (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); | |
869 | ||
f53696de | 870 | if (scan->channel_count == 0) { |
e1623446 | 871 | IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); |
f53696de TW |
872 | goto done; |
873 | } | |
2a421b91 | 874 | |
2a421b91 TW |
875 | cmd.len += le16_to_cpu(scan->tx_cmd.len) + |
876 | scan->channel_count * sizeof(struct iwl_scan_channel); | |
877 | cmd.data = scan; | |
878 | scan->len = cpu_to_le16(cmd.len); | |
879 | ||
880 | set_bit(STATUS_SCAN_HW, &priv->status); | |
881 | ret = iwl_send_cmd_sync(priv, &cmd); | |
882 | if (ret) | |
883 | goto done; | |
884 | ||
885 | queue_delayed_work(priv->workqueue, &priv->scan_check, | |
886 | IWL_SCAN_CHECK_WATCHDOG); | |
887 | ||
888 | mutex_unlock(&priv->mutex); | |
889 | return; | |
890 | ||
891 | done: | |
951891c7 MA |
892 | /* Cannot perform scan. Make sure we clear scanning |
893 | * bits from status so next scan request can be performed. | |
894 | * If we don't clear scanning status bit here all next scan | |
895 | * will fail | |
896 | */ | |
897 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
898 | clear_bit(STATUS_SCANNING, &priv->status); | |
2a421b91 TW |
899 | /* inform mac80211 scan aborted */ |
900 | queue_work(priv->workqueue, &priv->scan_completed); | |
901 | mutex_unlock(&priv->mutex); | |
902 | } | |
903 | ||
77fecfb8 | 904 | void iwl_bg_abort_scan(struct work_struct *work) |
2a421b91 TW |
905 | { |
906 | struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); | |
907 | ||
908 | if (!iwl_is_ready(priv)) | |
909 | return; | |
910 | ||
911 | mutex_lock(&priv->mutex); | |
912 | ||
913 | set_bit(STATUS_SCAN_ABORTING, &priv->status); | |
914 | iwl_send_scan_abort(priv); | |
915 | ||
916 | mutex_unlock(&priv->mutex); | |
917 | } | |
77fecfb8 | 918 | EXPORT_SYMBOL(iwl_bg_abort_scan); |
2a421b91 | 919 | |
77fecfb8 | 920 | void iwl_bg_scan_completed(struct work_struct *work) |
eedda367 TW |
921 | { |
922 | struct iwl_priv *priv = | |
923 | container_of(work, struct iwl_priv, scan_completed); | |
924 | ||
e1623446 | 925 | IWL_DEBUG_SCAN(priv, "SCAN complete scan\n"); |
eedda367 | 926 | |
fbc9f97b RC |
927 | cancel_delayed_work(&priv->scan_check); |
928 | ||
74aa9be0 JB |
929 | ieee80211_scan_completed(priv->hw, false); |
930 | ||
eedda367 TW |
931 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
932 | return; | |
933 | ||
eedda367 TW |
934 | /* Since setting the TXPOWER may have been deferred while |
935 | * performing the scan, fire one off */ | |
936 | mutex_lock(&priv->mutex); | |
937 | iwl_set_tx_power(priv, priv->tx_power_user_lmt, true); | |
938 | mutex_unlock(&priv->mutex); | |
939 | } | |
77fecfb8 | 940 | EXPORT_SYMBOL(iwl_bg_scan_completed); |
eedda367 | 941 | |
2a421b91 TW |
942 | void iwl_setup_scan_deferred_work(struct iwl_priv *priv) |
943 | { | |
eedda367 | 944 | INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); |
2a421b91 TW |
945 | INIT_WORK(&priv->request_scan, iwl_bg_request_scan); |
946 | INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); | |
947 | INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); | |
948 | } | |
949 | EXPORT_SYMBOL(iwl_setup_scan_deferred_work); | |
950 |