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2a421b91 TW |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
51368bf7 | 5 | * Copyright(c) 2008 - 2014 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 | |
410dc5aa | 22 | * in the file called COPYING. |
2a421b91 TW |
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 | 32 | |
1023fdc4 JB |
33 | #include "dev.h" |
34 | #include "agn.h" | |
2a421b91 TW |
35 | |
36 | /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after | |
37 | * sending probe req. This should be set long enough to hear probe responses | |
38 | * from more than one AP. */ | |
fe905f1d TW |
39 | #define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ |
40 | #define IWL_ACTIVE_DWELL_TIME_52 (20) | |
41 | ||
42 | #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3) | |
43 | #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2) | |
2a421b91 | 44 | |
2a421b91 TW |
45 | /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. |
46 | * Must be set longer than active dwell time. | |
47 | * For the most reliable scan, set > AP beacon interval (typically 100msec). */ | |
48 | #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ | |
49 | #define IWL_PASSIVE_DWELL_TIME_52 (10) | |
50 | #define IWL_PASSIVE_DWELL_BASE (100) | |
51 | #define IWL_CHANNEL_TUNE_TIME 5 | |
0ed46287 | 52 | #define MAX_SCAN_CHANNEL 50 |
2a421b91 | 53 | |
0d4e0772 JB |
54 | /* For reset radio, need minimal dwell time only */ |
55 | #define IWL_RADIO_RESET_DWELL_TIME 5 | |
56 | ||
cd44600f SG |
57 | static int iwl_send_scan_abort(struct iwl_priv *priv) |
58 | { | |
59 | int ret; | |
cd44600f SG |
60 | struct iwl_host_cmd cmd = { |
61 | .id = REPLY_SCAN_ABORT_CMD, | |
a1022927 | 62 | .flags = CMD_WANT_SKB, |
cd44600f | 63 | }; |
f8d7c1a1 | 64 | __le32 *status; |
fe905f1d | 65 | |
cd44600f SG |
66 | /* Exit instantly with error when device is not ready |
67 | * to receive scan abort command or it does not perform | |
68 | * hardware scan currently */ | |
83626404 | 69 | if (!test_bit(STATUS_READY, &priv->status) || |
83626404 | 70 | !test_bit(STATUS_SCAN_HW, &priv->status) || |
17acd0b6 | 71 | test_bit(STATUS_FW_ERROR, &priv->status)) |
cd44600f | 72 | return -EIO; |
fe905f1d | 73 | |
e10a0533 | 74 | ret = iwl_dvm_send_cmd(priv, &cmd); |
cd44600f SG |
75 | if (ret) |
76 | return ret; | |
77 | ||
f8d7c1a1 JB |
78 | status = (void *)cmd.resp_pkt->data; |
79 | if (*status != CAN_ABORT_STATUS) { | |
cd44600f SG |
80 | /* The scan abort will return 1 for success or |
81 | * 2 for "failure". A failure condition can be | |
82 | * due to simply not being in an active scan which | |
83 | * can occur if we send the scan abort before we | |
84 | * the microcode has notified us that a scan is | |
85 | * completed. */ | |
f8d7c1a1 JB |
86 | IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n", |
87 | le32_to_cpu(*status)); | |
cd44600f | 88 | ret = -EIO; |
2a421b91 TW |
89 | } |
90 | ||
65b94a4a | 91 | iwl_free_resp(&cmd); |
cd44600f SG |
92 | return ret; |
93 | } | |
2a421b91 | 94 | |
02d8c14b SG |
95 | static void iwl_complete_scan(struct iwl_priv *priv, bool aborted) |
96 | { | |
97 | /* check if scan was requested from mac80211 */ | |
98 | if (priv->scan_request) { | |
99 | IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n"); | |
100 | ieee80211_scan_completed(priv->hw, aborted); | |
101 | } | |
102 | ||
266af4c7 | 103 | priv->scan_type = IWL_SCAN_NORMAL; |
02d8c14b SG |
104 | priv->scan_vif = NULL; |
105 | priv->scan_request = NULL; | |
106 | } | |
107 | ||
a2fa2462 JB |
108 | static void iwl_process_scan_complete(struct iwl_priv *priv) |
109 | { | |
110 | bool aborted; | |
111 | ||
b1eea297 | 112 | lockdep_assert_held(&priv->mutex); |
84b1bec6 | 113 | |
83626404 | 114 | if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status)) |
84b1bec6 JB |
115 | return; |
116 | ||
a2fa2462 JB |
117 | IWL_DEBUG_SCAN(priv, "Completed scan.\n"); |
118 | ||
119 | cancel_delayed_work(&priv->scan_check); | |
120 | ||
83626404 | 121 | aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status); |
a2fa2462 JB |
122 | if (aborted) |
123 | IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n"); | |
124 | ||
83626404 | 125 | if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) { |
a2fa2462 JB |
126 | IWL_DEBUG_SCAN(priv, "Scan already completed.\n"); |
127 | goto out_settings; | |
128 | } | |
129 | ||
a2fa2462 JB |
130 | if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) { |
131 | int err; | |
132 | ||
133 | /* Check if mac80211 requested scan during our internal scan */ | |
134 | if (priv->scan_request == NULL) | |
135 | goto out_complete; | |
136 | ||
137 | /* If so request a new scan */ | |
138 | err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL, | |
139 | priv->scan_request->channels[0]->band); | |
140 | if (err) { | |
141 | IWL_DEBUG_SCAN(priv, | |
142 | "failed to initiate pending scan: %d\n", err); | |
143 | aborted = true; | |
144 | goto out_complete; | |
145 | } | |
146 | ||
147 | return; | |
148 | } | |
149 | ||
150 | out_complete: | |
151 | iwl_complete_scan(priv, aborted); | |
152 | ||
153 | out_settings: | |
154 | /* Can we still talk to firmware ? */ | |
83626404 | 155 | if (!iwl_is_ready_rf(priv)) |
a2fa2462 JB |
156 | return; |
157 | ||
158 | iwlagn_post_scan(priv); | |
159 | } | |
160 | ||
e7e16b90 | 161 | void iwl_force_scan_end(struct iwl_priv *priv) |
f5354c17 | 162 | { |
b1eea297 | 163 | lockdep_assert_held(&priv->mutex); |
e7e16b90 | 164 | |
83626404 | 165 | if (!test_bit(STATUS_SCANNING, &priv->status)) { |
e7e16b90 SG |
166 | IWL_DEBUG_SCAN(priv, "Forcing scan end while not scanning\n"); |
167 | return; | |
168 | } | |
169 | ||
f5354c17 | 170 | IWL_DEBUG_SCAN(priv, "Forcing scan end\n"); |
83626404 DF |
171 | clear_bit(STATUS_SCANNING, &priv->status); |
172 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
173 | clear_bit(STATUS_SCAN_ABORTING, &priv->status); | |
174 | clear_bit(STATUS_SCAN_COMPLETE, &priv->status); | |
f5354c17 SG |
175 | iwl_complete_scan(priv, true); |
176 | } | |
177 | ||
cd44600f SG |
178 | static void iwl_do_scan_abort(struct iwl_priv *priv) |
179 | { | |
180 | int ret; | |
2a421b91 | 181 | |
b1eea297 | 182 | lockdep_assert_held(&priv->mutex); |
cd44600f | 183 | |
83626404 | 184 | if (!test_bit(STATUS_SCANNING, &priv->status)) { |
cd44600f SG |
185 | IWL_DEBUG_SCAN(priv, "Not performing scan to abort\n"); |
186 | return; | |
2a421b91 TW |
187 | } |
188 | ||
83626404 | 189 | if (test_and_set_bit(STATUS_SCAN_ABORTING, &priv->status)) { |
cd44600f SG |
190 | IWL_DEBUG_SCAN(priv, "Scan abort in progress\n"); |
191 | return; | |
192 | } | |
193 | ||
194 | ret = iwl_send_scan_abort(priv); | |
195 | if (ret) { | |
196 | IWL_DEBUG_SCAN(priv, "Send scan abort failed %d\n", ret); | |
f5354c17 | 197 | iwl_force_scan_end(priv); |
cd44600f | 198 | } else |
25985edc | 199 | IWL_DEBUG_SCAN(priv, "Successfully send scan abort\n"); |
cd44600f SG |
200 | } |
201 | ||
202 | /** | |
203 | * iwl_scan_cancel - Cancel any currently executing HW scan | |
204 | */ | |
205 | int iwl_scan_cancel(struct iwl_priv *priv) | |
206 | { | |
207 | IWL_DEBUG_SCAN(priv, "Queuing abort scan\n"); | |
1ee158d8 | 208 | queue_work(priv->workqueue, &priv->abort_scan); |
2a421b91 TW |
209 | return 0; |
210 | } | |
cd44600f | 211 | |
2a421b91 TW |
212 | /** |
213 | * iwl_scan_cancel_timeout - Cancel any currently executing HW scan | |
214 | * @ms: amount of time to wait (in milliseconds) for scan to abort | |
215 | * | |
2a421b91 | 216 | */ |
98efb4a5 | 217 | void iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms) |
2a421b91 | 218 | { |
e693a802 SG |
219 | unsigned long timeout = jiffies + msecs_to_jiffies(ms); |
220 | ||
b1eea297 | 221 | lockdep_assert_held(&priv->mutex); |
2a421b91 | 222 | |
e693a802 | 223 | IWL_DEBUG_SCAN(priv, "Scan cancel timeout\n"); |
2a421b91 | 224 | |
e693a802 SG |
225 | iwl_do_scan_abort(priv); |
226 | ||
227 | while (time_before_eq(jiffies, timeout)) { | |
83626404 | 228 | if (!test_bit(STATUS_SCAN_HW, &priv->status)) |
84b1bec6 | 229 | goto finished; |
e693a802 | 230 | msleep(20); |
2a421b91 | 231 | } |
84b1bec6 JB |
232 | |
233 | return; | |
234 | ||
235 | finished: | |
236 | /* | |
237 | * Now STATUS_SCAN_HW is clear. This means that the | |
238 | * device finished, but the background work is going | |
239 | * to execute at best as soon as we release the mutex. | |
240 | * Since we need to be able to issue a new scan right | |
241 | * after this function returns, run the complete here. | |
242 | * The STATUS_SCAN_COMPLETE bit will then be cleared | |
243 | * and prevent the background work from "completing" | |
244 | * a possible new scan. | |
245 | */ | |
246 | iwl_process_scan_complete(priv); | |
2a421b91 | 247 | } |
2a421b91 | 248 | |
2a421b91 | 249 | /* Service response to REPLY_SCAN_CMD (0x80) */ |
247c61d6 | 250 | static int iwl_rx_reply_scan(struct iwl_priv *priv, |
48a2d66f | 251 | struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 252 | struct iwl_device_cmd *cmd) |
2a421b91 TW |
253 | { |
254 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 255 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
f8d7c1a1 | 256 | struct iwl_scanreq_notification *notif = (void *)pkt->data; |
2a421b91 | 257 | |
7cf24421 | 258 | IWL_DEBUG_SCAN(priv, "Scan request status = 0x%x\n", notif->status); |
2a421b91 | 259 | #endif |
247c61d6 | 260 | return 0; |
2a421b91 TW |
261 | } |
262 | ||
263 | /* Service SCAN_START_NOTIFICATION (0x82) */ | |
247c61d6 | 264 | static int iwl_rx_scan_start_notif(struct iwl_priv *priv, |
48a2d66f | 265 | struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 266 | struct iwl_device_cmd *cmd) |
2a421b91 | 267 | { |
2f301227 | 268 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
f8d7c1a1 JB |
269 | struct iwl_scanstart_notification *notif = (void *)pkt->data; |
270 | ||
2a421b91 | 271 | priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); |
e1623446 | 272 | IWL_DEBUG_SCAN(priv, "Scan start: " |
2a421b91 TW |
273 | "%d [802.11%s] " |
274 | "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", | |
275 | notif->channel, | |
276 | notif->band ? "bg" : "a", | |
fe905f1d TW |
277 | le32_to_cpu(notif->tsf_high), |
278 | le32_to_cpu(notif->tsf_low), | |
279 | notif->status, notif->beacon_timer); | |
c6baf7fb | 280 | |
247c61d6 | 281 | return 0; |
2a421b91 TW |
282 | } |
283 | ||
284 | /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ | |
247c61d6 | 285 | static int iwl_rx_scan_results_notif(struct iwl_priv *priv, |
48a2d66f | 286 | struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 287 | struct iwl_device_cmd *cmd) |
2a421b91 TW |
288 | { |
289 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2f301227 | 290 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
f8d7c1a1 | 291 | struct iwl_scanresults_notification *notif = (void *)pkt->data; |
2a421b91 | 292 | |
e1623446 | 293 | IWL_DEBUG_SCAN(priv, "Scan ch.res: " |
2a421b91 | 294 | "%d [802.11%s] " |
1895b36b | 295 | "probe status: %u:%u " |
2a421b91 | 296 | "(TSF: 0x%08X:%08X) - %d " |
220575f7 | 297 | "elapsed=%lu usec\n", |
2a421b91 TW |
298 | notif->channel, |
299 | notif->band ? "bg" : "a", | |
1895b36b | 300 | notif->probe_status, notif->num_probe_not_sent, |
2a421b91 TW |
301 | le32_to_cpu(notif->tsf_high), |
302 | le32_to_cpu(notif->tsf_low), | |
303 | le32_to_cpu(notif->statistics[0]), | |
220575f7 | 304 | le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf); |
2a421b91 | 305 | #endif |
247c61d6 | 306 | return 0; |
2a421b91 TW |
307 | } |
308 | ||
309 | /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ | |
247c61d6 | 310 | static int iwl_rx_scan_complete_notif(struct iwl_priv *priv, |
48a2d66f | 311 | struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 312 | struct iwl_device_cmd *cmd) |
2a421b91 | 313 | { |
2f301227 | 314 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
f8d7c1a1 | 315 | struct iwl_scancomplete_notification *scan_notif = (void *)pkt->data; |
2a421b91 | 316 | |
e1623446 | 317 | IWL_DEBUG_SCAN(priv, "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", |
2a421b91 TW |
318 | scan_notif->scanned_channels, |
319 | scan_notif->tsf_low, | |
320 | scan_notif->tsf_high, scan_notif->status); | |
321 | ||
7cf24421 | 322 | IWL_DEBUG_SCAN(priv, "Scan on %sGHz took %dms\n", |
00700ee0 | 323 | (priv->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2", |
ef1b21f7 | 324 | jiffies_to_msecs(jiffies - priv->scan_start)); |
2a421b91 | 325 | |
84b1bec6 JB |
326 | /* |
327 | * When aborting, we run the scan completed background work inline | |
328 | * and the background work must then do nothing. The SCAN_COMPLETE | |
329 | * bit helps implement that logic and thus needs to be set before | |
330 | * queueing the work. Also, since the scan abort waits for SCAN_HW | |
331 | * to clear, we need to set SCAN_COMPLETE before clearing SCAN_HW | |
332 | * to avoid a race there. | |
333 | */ | |
83626404 DF |
334 | set_bit(STATUS_SCAN_COMPLETE, &priv->status); |
335 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
1ee158d8 | 336 | queue_work(priv->workqueue, &priv->scan_completed); |
2a421b91 | 337 | |
f78e5454 | 338 | if (priv->iw_mode != NL80211_IFTYPE_ADHOC && |
88e58fc5 | 339 | iwl_advanced_bt_coexist(priv) && |
d5926d9d | 340 | priv->bt_status != scan_notif->bt_status) { |
f78e5454 WYG |
341 | if (scan_notif->bt_status) { |
342 | /* BT on */ | |
343 | if (!priv->bt_ch_announce) | |
344 | priv->bt_traffic_load = | |
345 | IWL_BT_COEX_TRAFFIC_LOAD_HIGH; | |
346 | /* | |
347 | * otherwise, no traffic load information provided | |
348 | * no changes made | |
349 | */ | |
350 | } else { | |
351 | /* BT off */ | |
352 | priv->bt_traffic_load = | |
353 | IWL_BT_COEX_TRAFFIC_LOAD_NONE; | |
354 | } | |
355 | priv->bt_status = scan_notif->bt_status; | |
1ee158d8 | 356 | queue_work(priv->workqueue, |
74e28e44 | 357 | &priv->bt_traffic_change_work); |
f78e5454 | 358 | } |
247c61d6 | 359 | return 0; |
2a421b91 TW |
360 | } |
361 | ||
362 | void iwl_setup_rx_scan_handlers(struct iwl_priv *priv) | |
363 | { | |
364 | /* scan handlers */ | |
365 | priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan; | |
366 | priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif; | |
367 | priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = | |
368 | iwl_rx_scan_results_notif; | |
369 | priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = | |
370 | iwl_rx_scan_complete_notif; | |
371 | } | |
2a421b91 | 372 | |
6e809a16 JB |
373 | static u16 iwl_get_active_dwell_time(struct iwl_priv *priv, |
374 | enum ieee80211_band band, u8 n_probes) | |
2a421b91 TW |
375 | { |
376 | if (band == IEEE80211_BAND_5GHZ) | |
fe905f1d TW |
377 | return IWL_ACTIVE_DWELL_TIME_52 + |
378 | IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); | |
2a421b91 | 379 | else |
fe905f1d TW |
380 | return IWL_ACTIVE_DWELL_TIME_24 + |
381 | IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); | |
2a421b91 TW |
382 | } |
383 | ||
390808db JB |
384 | static u16 iwl_limit_dwell(struct iwl_priv *priv, u16 dwell_time) |
385 | { | |
386 | struct iwl_rxon_context *ctx; | |
b3a6d2e0 JB |
387 | int limits[NUM_IWL_RXON_CTX] = {}; |
388 | int n_active = 0; | |
389 | u16 limit; | |
390 | ||
391 | BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); | |
390808db JB |
392 | |
393 | /* | |
394 | * If we're associated, we clamp the dwell time 98% | |
b3a6d2e0 JB |
395 | * of the beacon interval (minus 2 * channel tune time) |
396 | * If both contexts are active, we have to restrict to | |
397 | * 1/2 of the minimum of them, because they might be in | |
398 | * lock-step with the time inbetween only half of what | |
399 | * time we'd have in each of them. | |
390808db JB |
400 | */ |
401 | for_each_context(priv, ctx) { | |
2ed81710 JB |
402 | switch (ctx->staging.dev_type) { |
403 | case RXON_DEV_TYPE_P2P: | |
404 | /* no timing constraints */ | |
eb32043f | 405 | continue; |
2ed81710 JB |
406 | case RXON_DEV_TYPE_ESS: |
407 | default: | |
408 | /* timing constraints if associated */ | |
409 | if (!iwl_is_associated_ctx(ctx)) | |
410 | continue; | |
411 | break; | |
412 | case RXON_DEV_TYPE_CP: | |
413 | case RXON_DEV_TYPE_2STA: | |
414 | /* | |
415 | * These seem to always have timers for TBTT | |
416 | * active in uCode even when not associated yet. | |
417 | */ | |
418 | break; | |
419 | } | |
420 | ||
b3a6d2e0 | 421 | limits[n_active++] = ctx->beacon_int ?: IWL_PASSIVE_DWELL_BASE; |
390808db JB |
422 | } |
423 | ||
b3a6d2e0 JB |
424 | switch (n_active) { |
425 | case 0: | |
426 | return dwell_time; | |
427 | case 2: | |
428 | limit = (limits[1] * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; | |
429 | limit /= 2; | |
430 | dwell_time = min(limit, dwell_time); | |
431 | /* fall through to limit further */ | |
432 | case 1: | |
433 | limit = (limits[0] * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; | |
434 | limit /= n_active; | |
435 | return min(limit, dwell_time); | |
436 | default: | |
437 | WARN_ON_ONCE(1); | |
438 | return dwell_time; | |
439 | } | |
390808db JB |
440 | } |
441 | ||
6e809a16 JB |
442 | static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, |
443 | enum ieee80211_band band) | |
2a421b91 | 444 | { |
fe905f1d | 445 | u16 passive = (band == IEEE80211_BAND_2GHZ) ? |
2a421b91 TW |
446 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : |
447 | IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; | |
448 | ||
390808db | 449 | return iwl_limit_dwell(priv, passive); |
2a421b91 TW |
450 | } |
451 | ||
c736f235 MV |
452 | /* Return valid, unused, channel for a passive scan to reset the RF */ |
453 | static u8 iwl_get_single_channel_number(struct iwl_priv *priv, | |
d9b9d940 | 454 | enum ieee80211_band band) |
c736f235 | 455 | { |
d9b9d940 | 456 | struct ieee80211_supported_band *sband = priv->hw->wiphy->bands[band]; |
c736f235 | 457 | struct iwl_rxon_context *ctx; |
d9b9d940 | 458 | int i; |
c736f235 | 459 | |
d9b9d940 | 460 | for (i = 0; i < sband->n_channels; i++) { |
c736f235 MV |
461 | bool busy = false; |
462 | ||
463 | for_each_context(priv, ctx) { | |
d9b9d940 | 464 | busy = sband->channels[i].hw_value == |
c736f235 MV |
465 | le16_to_cpu(ctx->staging.channel); |
466 | if (busy) | |
467 | break; | |
468 | } | |
469 | ||
470 | if (busy) | |
471 | continue; | |
472 | ||
d9b9d940 JB |
473 | if (!(sband->channels[i].flags & IEEE80211_CHAN_DISABLED)) |
474 | return sband->channels[i].hw_value; | |
c736f235 MV |
475 | } |
476 | ||
d9b9d940 | 477 | return 0; |
c736f235 MV |
478 | } |
479 | ||
0d4e0772 JB |
480 | static int iwl_get_channel_for_reset_scan(struct iwl_priv *priv, |
481 | struct ieee80211_vif *vif, | |
482 | enum ieee80211_band band, | |
483 | struct iwl_scan_channel *scan_ch) | |
6e809a16 JB |
484 | { |
485 | const struct ieee80211_supported_band *sband; | |
0d4e0772 | 486 | u16 channel; |
6e809a16 JB |
487 | |
488 | sband = iwl_get_hw_mode(priv, band); | |
489 | if (!sband) { | |
490 | IWL_ERR(priv, "invalid band\n"); | |
0d4e0772 | 491 | return 0; |
6e809a16 JB |
492 | } |
493 | ||
6e809a16 JB |
494 | channel = iwl_get_single_channel_number(priv, band); |
495 | if (channel) { | |
496 | scan_ch->channel = cpu_to_le16(channel); | |
497 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; | |
0d4e0772 JB |
498 | scan_ch->active_dwell = |
499 | cpu_to_le16(IWL_RADIO_RESET_DWELL_TIME); | |
500 | scan_ch->passive_dwell = | |
501 | cpu_to_le16(IWL_RADIO_RESET_DWELL_TIME); | |
6e809a16 JB |
502 | /* Set txpower levels to defaults */ |
503 | scan_ch->dsp_atten = 110; | |
504 | if (band == IEEE80211_BAND_5GHZ) | |
505 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
506 | else | |
507 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
0d4e0772 JB |
508 | return 1; |
509 | } | |
510 | ||
511 | IWL_ERR(priv, "no valid channel found\n"); | |
512 | return 0; | |
6e809a16 JB |
513 | } |
514 | ||
515 | static int iwl_get_channels_for_scan(struct iwl_priv *priv, | |
516 | struct ieee80211_vif *vif, | |
517 | enum ieee80211_band band, | |
518 | u8 is_active, u8 n_probes, | |
519 | struct iwl_scan_channel *scan_ch) | |
520 | { | |
521 | struct ieee80211_channel *chan; | |
522 | const struct ieee80211_supported_band *sband; | |
6e809a16 JB |
523 | u16 passive_dwell = 0; |
524 | u16 active_dwell = 0; | |
525 | int added, i; | |
526 | u16 channel; | |
527 | ||
528 | sband = iwl_get_hw_mode(priv, band); | |
529 | if (!sband) | |
530 | return 0; | |
531 | ||
532 | active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); | |
533 | passive_dwell = iwl_get_passive_dwell_time(priv, band); | |
534 | ||
535 | if (passive_dwell <= active_dwell) | |
536 | passive_dwell = active_dwell + 1; | |
537 | ||
538 | for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { | |
539 | chan = priv->scan_request->channels[i]; | |
540 | ||
541 | if (chan->band != band) | |
542 | continue; | |
543 | ||
544 | channel = chan->hw_value; | |
545 | scan_ch->channel = cpu_to_le16(channel); | |
546 | ||
8fe02e16 | 547 | if (!is_active || (chan->flags & IEEE80211_CHAN_NO_IR)) |
6e809a16 JB |
548 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; |
549 | else | |
550 | scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; | |
551 | ||
552 | if (n_probes) | |
553 | scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); | |
554 | ||
555 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
556 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
557 | ||
558 | /* Set txpower levels to defaults */ | |
559 | scan_ch->dsp_atten = 110; | |
560 | ||
561 | /* NOTE: if we were doing 6Mb OFDM for scans we'd use | |
562 | * power level: | |
563 | * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; | |
564 | */ | |
565 | if (band == IEEE80211_BAND_5GHZ) | |
566 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
567 | else | |
568 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
569 | ||
570 | IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", | |
571 | channel, le32_to_cpu(scan_ch->type), | |
572 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
573 | "ACTIVE" : "PASSIVE", | |
574 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
575 | active_dwell : passive_dwell); | |
576 | ||
577 | scan_ch++; | |
578 | added++; | |
579 | } | |
580 | ||
581 | IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added); | |
582 | return added; | |
583 | } | |
584 | ||
b443d8d8 JB |
585 | /** |
586 | * iwl_fill_probe_req - fill in all required fields and IE for probe request | |
587 | */ | |
588 | ||
589 | static u16 iwl_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta, | |
4f9bfbb1 DS |
590 | const u8 *ies, int ie_len, const u8 *ssid, |
591 | u8 ssid_len, int left) | |
b443d8d8 JB |
592 | { |
593 | int len = 0; | |
594 | u8 *pos = NULL; | |
595 | ||
596 | /* Make sure there is enough space for the probe request, | |
597 | * two mandatory IEs and the data */ | |
598 | left -= 24; | |
599 | if (left < 0) | |
600 | return 0; | |
601 | ||
602 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
ca42613a | 603 | eth_broadcast_addr(frame->da); |
b443d8d8 | 604 | memcpy(frame->sa, ta, ETH_ALEN); |
ca42613a | 605 | eth_broadcast_addr(frame->bssid); |
b443d8d8 JB |
606 | frame->seq_ctrl = 0; |
607 | ||
608 | len += 24; | |
609 | ||
610 | /* ...next IE... */ | |
611 | pos = &frame->u.probe_req.variable[0]; | |
612 | ||
4f9bfbb1 DS |
613 | /* fill in our SSID IE */ |
614 | left -= ssid_len + 2; | |
b443d8d8 JB |
615 | if (left < 0) |
616 | return 0; | |
617 | *pos++ = WLAN_EID_SSID; | |
4f9bfbb1 DS |
618 | *pos++ = ssid_len; |
619 | if (ssid && ssid_len) { | |
620 | memcpy(pos, ssid, ssid_len); | |
621 | pos += ssid_len; | |
622 | } | |
b443d8d8 | 623 | |
4f9bfbb1 | 624 | len += ssid_len + 2; |
b443d8d8 JB |
625 | |
626 | if (WARN_ON(left < ie_len)) | |
627 | return len; | |
628 | ||
629 | if (ies && ie_len) { | |
630 | memcpy(pos, ies, ie_len); | |
631 | len += ie_len; | |
632 | } | |
633 | ||
634 | return (u16)len; | |
635 | } | |
636 | ||
6e809a16 JB |
637 | static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif) |
638 | { | |
639 | struct iwl_host_cmd cmd = { | |
640 | .id = REPLY_SCAN_CMD, | |
641 | .len = { sizeof(struct iwl_scan_cmd), }, | |
6e809a16 JB |
642 | }; |
643 | struct iwl_scan_cmd *scan; | |
644 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
645 | u32 rate_flags = 0; | |
331d9301 | 646 | u16 cmd_len = 0; |
6e809a16 JB |
647 | u16 rx_chain = 0; |
648 | enum ieee80211_band band; | |
649 | u8 n_probes = 0; | |
b7998c8b | 650 | u8 rx_ant = priv->nvm_data->valid_rx_ant; |
6e809a16 JB |
651 | u8 rate; |
652 | bool is_active = false; | |
653 | int chan_mod; | |
654 | u8 active_chains; | |
b7998c8b | 655 | u8 scan_tx_antennas = priv->nvm_data->valid_tx_ant; |
6e809a16 | 656 | int ret; |
0ed46287 DS |
657 | int scan_cmd_size = sizeof(struct iwl_scan_cmd) + |
658 | MAX_SCAN_CHANNEL * sizeof(struct iwl_scan_channel) + | |
659 | priv->fw->ucode_capa.max_probe_length; | |
4f9bfbb1 DS |
660 | const u8 *ssid = NULL; |
661 | u8 ssid_len = 0; | |
0ed46287 | 662 | |
8907a6fb TG |
663 | if (WARN_ON(priv->scan_type == IWL_SCAN_NORMAL && |
664 | (!priv->scan_request || | |
665 | priv->scan_request->n_channels > MAX_SCAN_CHANNEL))) | |
0ed46287 | 666 | return -EINVAL; |
6e809a16 | 667 | |
b1eea297 | 668 | lockdep_assert_held(&priv->mutex); |
6e809a16 JB |
669 | |
670 | if (vif) | |
671 | ctx = iwl_rxon_ctx_from_vif(vif); | |
672 | ||
673 | if (!priv->scan_cmd) { | |
0ed46287 | 674 | priv->scan_cmd = kmalloc(scan_cmd_size, GFP_KERNEL); |
6e809a16 JB |
675 | if (!priv->scan_cmd) { |
676 | IWL_DEBUG_SCAN(priv, | |
677 | "fail to allocate memory for scan\n"); | |
678 | return -ENOMEM; | |
679 | } | |
680 | } | |
681 | scan = priv->scan_cmd; | |
0ed46287 | 682 | memset(scan, 0, scan_cmd_size); |
6e809a16 JB |
683 | |
684 | scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; | |
685 | scan->quiet_time = IWL_ACTIVE_QUIET_TIME; | |
686 | ||
da4f87f0 | 687 | if (iwl_is_any_associated(priv)) { |
6e809a16 JB |
688 | u16 interval = 0; |
689 | u32 extra; | |
690 | u32 suspend_time = 100; | |
691 | u32 scan_suspend_time = 100; | |
692 | ||
693 | IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); | |
694 | switch (priv->scan_type) { | |
6e809a16 JB |
695 | case IWL_SCAN_RADIO_RESET: |
696 | interval = 0; | |
697 | break; | |
698 | case IWL_SCAN_NORMAL: | |
699 | interval = vif->bss_conf.beacon_int; | |
700 | break; | |
701 | } | |
702 | ||
703 | scan->suspend_time = 0; | |
704 | scan->max_out_time = cpu_to_le32(200 * 1024); | |
705 | if (!interval) | |
706 | interval = suspend_time; | |
707 | ||
708 | extra = (suspend_time / interval) << 22; | |
709 | scan_suspend_time = (extra | | |
710 | ((suspend_time % interval) * 1024)); | |
711 | scan->suspend_time = cpu_to_le32(scan_suspend_time); | |
712 | IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", | |
713 | scan_suspend_time, interval); | |
6e809a16 JB |
714 | } |
715 | ||
716 | switch (priv->scan_type) { | |
717 | case IWL_SCAN_RADIO_RESET: | |
718 | IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); | |
3f8a9e76 JB |
719 | /* |
720 | * Override quiet time as firmware checks that active | |
721 | * dwell is >= quiet; since we use passive scan it'll | |
722 | * not actually be used. | |
723 | */ | |
724 | scan->quiet_time = cpu_to_le16(IWL_RADIO_RESET_DWELL_TIME); | |
6e809a16 JB |
725 | break; |
726 | case IWL_SCAN_NORMAL: | |
727 | if (priv->scan_request->n_ssids) { | |
728 | int i, p = 0; | |
729 | IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); | |
4f9bfbb1 DS |
730 | /* |
731 | * The highest priority SSID is inserted to the | |
732 | * probe request template. | |
733 | */ | |
734 | ssid_len = priv->scan_request->ssids[0].ssid_len; | |
735 | ssid = priv->scan_request->ssids[0].ssid; | |
736 | ||
65781af6 DS |
737 | /* |
738 | * Invert the order of ssids, the firmware will invert | |
739 | * it back. | |
740 | */ | |
741 | for (i = priv->scan_request->n_ssids - 1; i >= 1; i--) { | |
6e809a16 JB |
742 | scan->direct_scan[p].id = WLAN_EID_SSID; |
743 | scan->direct_scan[p].len = | |
744 | priv->scan_request->ssids[i].ssid_len; | |
745 | memcpy(scan->direct_scan[p].ssid, | |
746 | priv->scan_request->ssids[i].ssid, | |
747 | priv->scan_request->ssids[i].ssid_len); | |
748 | n_probes++; | |
749 | p++; | |
750 | } | |
751 | is_active = true; | |
752 | } else | |
753 | IWL_DEBUG_SCAN(priv, "Start passive scan.\n"); | |
754 | break; | |
6e809a16 JB |
755 | } |
756 | ||
757 | scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; | |
758 | scan->tx_cmd.sta_id = ctx->bcast_sta_id; | |
759 | scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
760 | ||
761 | switch (priv->scan_band) { | |
762 | case IEEE80211_BAND_2GHZ: | |
763 | scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; | |
764 | chan_mod = le32_to_cpu( | |
765 | priv->contexts[IWL_RXON_CTX_BSS].active.flags & | |
766 | RXON_FLG_CHANNEL_MODE_MSK) | |
767 | >> RXON_FLG_CHANNEL_MODE_POS; | |
3a8aea09 JB |
768 | if ((priv->scan_request && priv->scan_request->no_cck) || |
769 | chan_mod == CHANNEL_MODE_PURE_40) { | |
6e809a16 JB |
770 | rate = IWL_RATE_6M_PLCP; |
771 | } else { | |
772 | rate = IWL_RATE_1M_PLCP; | |
773 | rate_flags = RATE_MCS_CCK_MSK; | |
774 | } | |
775 | /* | |
776 | * Internal scans are passive, so we can indiscriminately set | |
777 | * the BT ignore flag on 2.4 GHz since it applies to TX only. | |
778 | */ | |
0d8877a1 JB |
779 | if (priv->lib->bt_params && |
780 | priv->lib->bt_params->advanced_bt_coexist) | |
6e809a16 JB |
781 | scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT; |
782 | break; | |
783 | case IEEE80211_BAND_5GHZ: | |
784 | rate = IWL_RATE_6M_PLCP; | |
785 | break; | |
786 | default: | |
787 | IWL_WARN(priv, "Invalid scan band\n"); | |
788 | return -EIO; | |
789 | } | |
790 | ||
791 | /* | |
792 | * If active scanning is requested but a certain channel is | |
793 | * marked passive, we can do active scanning if we detect | |
794 | * transmissions. | |
795 | * | |
796 | * There is an issue with some firmware versions that triggers | |
797 | * a sysassert on a "good CRC threshold" of zero (== disabled), | |
798 | * on a radar channel even though this means that we should NOT | |
799 | * send probes. | |
800 | * | |
801 | * The "good CRC threshold" is the number of frames that we | |
802 | * need to receive during our dwell time on a channel before | |
803 | * sending out probes -- setting this to a huge value will | |
804 | * mean we never reach it, but at the same time work around | |
805 | * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER | |
806 | * here instead of IWL_GOOD_CRC_TH_DISABLED. | |
807 | * | |
808 | * This was fixed in later versions along with some other | |
809 | * scan changes, and the threshold behaves as a flag in those | |
810 | * versions. | |
811 | */ | |
812 | if (priv->new_scan_threshold_behaviour) | |
813 | scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : | |
814 | IWL_GOOD_CRC_TH_DISABLED; | |
815 | else | |
816 | scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : | |
817 | IWL_GOOD_CRC_TH_NEVER; | |
818 | ||
819 | band = priv->scan_band; | |
820 | ||
6e809a16 | 821 | if (band == IEEE80211_BAND_2GHZ && |
0d8877a1 JB |
822 | priv->lib->bt_params && |
823 | priv->lib->bt_params->advanced_bt_coexist) { | |
6e809a16 JB |
824 | /* transmit 2.4 GHz probes only on first antenna */ |
825 | scan_tx_antennas = first_antenna(scan_tx_antennas); | |
826 | } | |
827 | ||
828 | priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, | |
829 | priv->scan_tx_ant[band], | |
830 | scan_tx_antennas); | |
831 | rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); | |
832 | scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); | |
833 | ||
e5610382 JB |
834 | /* |
835 | * In power save mode while associated use one chain, | |
836 | * otherwise use all chains | |
837 | */ | |
47107e84 | 838 | if (test_bit(STATUS_POWER_PMI, &priv->status) && |
e5610382 | 839 | !(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) { |
6e809a16 JB |
840 | /* rx_ant has been set to all valid chains previously */ |
841 | active_chains = rx_ant & | |
842 | ((u8)(priv->chain_noise_data.active_chains)); | |
843 | if (!active_chains) | |
844 | active_chains = rx_ant; | |
845 | ||
846 | IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n", | |
847 | priv->chain_noise_data.active_chains); | |
848 | ||
849 | rx_ant = first_antenna(active_chains); | |
850 | } | |
0d8877a1 JB |
851 | if (priv->lib->bt_params && |
852 | priv->lib->bt_params->advanced_bt_coexist && | |
6e809a16 JB |
853 | priv->bt_full_concurrent) { |
854 | /* operated as 1x1 in full concurrency mode */ | |
855 | rx_ant = first_antenna(rx_ant); | |
856 | } | |
857 | ||
858 | /* MIMO is not used here, but value is required */ | |
859 | rx_chain |= | |
b7998c8b | 860 | priv->nvm_data->valid_rx_ant << RXON_RX_CHAIN_VALID_POS; |
6e809a16 JB |
861 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; |
862 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; | |
863 | rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; | |
864 | scan->rx_chain = cpu_to_le16(rx_chain); | |
865 | switch (priv->scan_type) { | |
866 | case IWL_SCAN_NORMAL: | |
b443d8d8 | 867 | cmd_len = iwl_fill_probe_req( |
6e809a16 JB |
868 | (struct ieee80211_mgmt *)scan->data, |
869 | vif->addr, | |
870 | priv->scan_request->ie, | |
871 | priv->scan_request->ie_len, | |
4f9bfbb1 | 872 | ssid, ssid_len, |
0ed46287 | 873 | scan_cmd_size - sizeof(*scan)); |
6e809a16 JB |
874 | break; |
875 | case IWL_SCAN_RADIO_RESET: | |
6e809a16 | 876 | /* use bcast addr, will not be transmitted but must be valid */ |
b443d8d8 | 877 | cmd_len = iwl_fill_probe_req( |
6e809a16 JB |
878 | (struct ieee80211_mgmt *)scan->data, |
879 | iwl_bcast_addr, NULL, 0, | |
4f9bfbb1 | 880 | NULL, 0, |
0ed46287 | 881 | scan_cmd_size - sizeof(*scan)); |
6e809a16 JB |
882 | break; |
883 | default: | |
884 | BUG(); | |
885 | } | |
886 | scan->tx_cmd.len = cpu_to_le16(cmd_len); | |
887 | ||
888 | scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | | |
889 | RXON_FILTER_BCON_AWARE_MSK); | |
890 | ||
891 | switch (priv->scan_type) { | |
892 | case IWL_SCAN_RADIO_RESET: | |
893 | scan->channel_count = | |
0d4e0772 | 894 | iwl_get_channel_for_reset_scan(priv, vif, band, |
6e809a16 JB |
895 | (void *)&scan->data[cmd_len]); |
896 | break; | |
897 | case IWL_SCAN_NORMAL: | |
898 | scan->channel_count = | |
899 | iwl_get_channels_for_scan(priv, vif, band, | |
900 | is_active, n_probes, | |
901 | (void *)&scan->data[cmd_len]); | |
902 | break; | |
6e809a16 JB |
903 | } |
904 | ||
905 | if (scan->channel_count == 0) { | |
906 | IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); | |
907 | return -EIO; | |
908 | } | |
909 | ||
910 | cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) + | |
911 | scan->channel_count * sizeof(struct iwl_scan_channel); | |
912 | cmd.data[0] = scan; | |
913 | cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; | |
914 | scan->len = cpu_to_le16(cmd.len[0]); | |
915 | ||
916 | /* set scan bit here for PAN params */ | |
83626404 | 917 | set_bit(STATUS_SCAN_HW, &priv->status); |
6e809a16 JB |
918 | |
919 | ret = iwlagn_set_pan_params(priv); | |
76a3aa89 IP |
920 | if (ret) { |
921 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
6e809a16 | 922 | return ret; |
76a3aa89 | 923 | } |
6e809a16 | 924 | |
e10a0533 | 925 | ret = iwl_dvm_send_cmd(priv, &cmd); |
6e809a16 | 926 | if (ret) { |
83626404 | 927 | clear_bit(STATUS_SCAN_HW, &priv->status); |
6e809a16 JB |
928 | iwlagn_set_pan_params(priv); |
929 | } | |
930 | ||
931 | return ret; | |
932 | } | |
933 | ||
f53696de TW |
934 | void iwl_init_scan_params(struct iwl_priv *priv) |
935 | { | |
b7998c8b | 936 | u8 ant_idx = fls(priv->nvm_data->valid_tx_ant) - 1; |
f53696de | 937 | if (!priv->scan_tx_ant[IEEE80211_BAND_5GHZ]) |
76eff18b | 938 | priv->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; |
f53696de | 939 | if (!priv->scan_tx_ant[IEEE80211_BAND_2GHZ]) |
76eff18b | 940 | priv->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; |
f53696de TW |
941 | } |
942 | ||
266af4c7 JB |
943 | int __must_check iwl_scan_initiate(struct iwl_priv *priv, |
944 | struct ieee80211_vif *vif, | |
945 | enum iwl_scan_type scan_type, | |
946 | enum ieee80211_band band) | |
2a421b91 | 947 | { |
3eecce52 JB |
948 | int ret; |
949 | ||
b1eea297 | 950 | lockdep_assert_held(&priv->mutex); |
88be0264 | 951 | |
3eecce52 JB |
952 | cancel_delayed_work(&priv->scan_check); |
953 | ||
83626404 | 954 | if (!iwl_is_ready_rf(priv)) { |
7cf24421 | 955 | IWL_WARN(priv, "Request scan called when driver not ready.\n"); |
3eecce52 JB |
956 | return -EIO; |
957 | } | |
958 | ||
83626404 | 959 | if (test_bit(STATUS_SCAN_HW, &priv->status)) { |
7cf24421 | 960 | IWL_DEBUG_SCAN(priv, |
3eecce52 JB |
961 | "Multiple concurrent scan requests in parallel.\n"); |
962 | return -EBUSY; | |
963 | } | |
964 | ||
83626404 | 965 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { |
7cf24421 | 966 | IWL_DEBUG_SCAN(priv, "Scan request while abort pending.\n"); |
3eecce52 JB |
967 | return -EBUSY; |
968 | } | |
969 | ||
7cf24421 | 970 | IWL_DEBUG_SCAN(priv, "Starting %sscan...\n", |
266af4c7 | 971 | scan_type == IWL_SCAN_NORMAL ? "" : |
266af4c7 | 972 | "internal short "); |
3eecce52 | 973 | |
83626404 | 974 | set_bit(STATUS_SCANNING, &priv->status); |
266af4c7 | 975 | priv->scan_type = scan_type; |
2a421b91 | 976 | priv->scan_start = jiffies; |
3eecce52 | 977 | priv->scan_band = band; |
2a421b91 | 978 | |
5c3d29fc | 979 | ret = iwlagn_request_scan(priv, vif); |
3eecce52 | 980 | if (ret) { |
83626404 | 981 | clear_bit(STATUS_SCANNING, &priv->status); |
266af4c7 | 982 | priv->scan_type = IWL_SCAN_NORMAL; |
3eecce52 JB |
983 | return ret; |
984 | } | |
b6e4c55a | 985 | |
1ee158d8 | 986 | queue_delayed_work(priv->workqueue, &priv->scan_check, |
3eecce52 | 987 | IWL_SCAN_CHECK_WATCHDOG); |
2a421b91 TW |
988 | |
989 | return 0; | |
990 | } | |
2a421b91 | 991 | |
e9dde6f6 | 992 | |
afbdd69a WYG |
993 | /* |
994 | * internal short scan, this function should only been called while associated. | |
995 | * It will reset and tune the radio to prevent possible RF related problem | |
996 | */ | |
88be0264 | 997 | void iwl_internal_short_hw_scan(struct iwl_priv *priv) |
afbdd69a | 998 | { |
1ee158d8 | 999 | queue_work(priv->workqueue, &priv->start_internal_scan); |
88be0264 JB |
1000 | } |
1001 | ||
c240879f | 1002 | static void iwl_bg_start_internal_scan(struct work_struct *work) |
88be0264 JB |
1003 | { |
1004 | struct iwl_priv *priv = | |
1005 | container_of(work, struct iwl_priv, start_internal_scan); | |
1006 | ||
7cf24421 SG |
1007 | IWL_DEBUG_SCAN(priv, "Start internal scan\n"); |
1008 | ||
b1eea297 | 1009 | mutex_lock(&priv->mutex); |
afbdd69a | 1010 | |
266af4c7 | 1011 | if (priv->scan_type == IWL_SCAN_RADIO_RESET) { |
073d5eab RC |
1012 | IWL_DEBUG_SCAN(priv, "Internal scan already in progress\n"); |
1013 | goto unlock; | |
1014 | } | |
1015 | ||
83626404 | 1016 | if (test_bit(STATUS_SCANNING, &priv->status)) { |
afbdd69a | 1017 | IWL_DEBUG_SCAN(priv, "Scan already in progress.\n"); |
88be0264 | 1018 | goto unlock; |
afbdd69a | 1019 | } |
88be0264 | 1020 | |
266af4c7 | 1021 | if (iwl_scan_initiate(priv, NULL, IWL_SCAN_RADIO_RESET, priv->band)) |
3eecce52 | 1022 | IWL_DEBUG_SCAN(priv, "failed to start internal short scan\n"); |
88be0264 | 1023 | unlock: |
b1eea297 | 1024 | mutex_unlock(&priv->mutex); |
afbdd69a | 1025 | } |
afbdd69a | 1026 | |
c240879f | 1027 | static void iwl_bg_scan_check(struct work_struct *data) |
2a421b91 TW |
1028 | { |
1029 | struct iwl_priv *priv = | |
1030 | container_of(data, struct iwl_priv, scan_check.work); | |
1031 | ||
7cf24421 SG |
1032 | IWL_DEBUG_SCAN(priv, "Scan check work\n"); |
1033 | ||
e7e16b90 SG |
1034 | /* Since we are here firmware does not finish scan and |
1035 | * most likely is in bad shape, so we don't bother to | |
1036 | * send abort command, just force scan complete to mac80211 */ | |
b1eea297 | 1037 | mutex_lock(&priv->mutex); |
e7e16b90 | 1038 | iwl_force_scan_end(priv); |
b1eea297 | 1039 | mutex_unlock(&priv->mutex); |
2a421b91 | 1040 | } |
77fecfb8 | 1041 | |
c240879f | 1042 | static void iwl_bg_abort_scan(struct work_struct *work) |
2a421b91 TW |
1043 | { |
1044 | struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); | |
1045 | ||
7cf24421 SG |
1046 | IWL_DEBUG_SCAN(priv, "Abort scan work\n"); |
1047 | ||
e7e16b90 SG |
1048 | /* We keep scan_check work queued in case when firmware will not |
1049 | * report back scan completed notification */ | |
b1eea297 | 1050 | mutex_lock(&priv->mutex); |
6bd1758d | 1051 | iwl_scan_cancel_timeout(priv, 200); |
b1eea297 | 1052 | mutex_unlock(&priv->mutex); |
2a421b91 TW |
1053 | } |
1054 | ||
f253247a JB |
1055 | static void iwl_bg_scan_completed(struct work_struct *work) |
1056 | { | |
1057 | struct iwl_priv *priv = | |
1058 | container_of(work, struct iwl_priv, scan_completed); | |
52a02d15 | 1059 | |
b1eea297 | 1060 | mutex_lock(&priv->mutex); |
f253247a | 1061 | iwl_process_scan_complete(priv); |
b1eea297 | 1062 | mutex_unlock(&priv->mutex); |
eedda367 | 1063 | } |
eedda367 | 1064 | |
2a421b91 TW |
1065 | void iwl_setup_scan_deferred_work(struct iwl_priv *priv) |
1066 | { | |
eedda367 | 1067 | INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed); |
2a421b91 | 1068 | INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan); |
88be0264 | 1069 | INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan); |
2a421b91 TW |
1070 | INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check); |
1071 | } | |
2a421b91 | 1072 | |
e7e16b90 SG |
1073 | void iwl_cancel_scan_deferred_work(struct iwl_priv *priv) |
1074 | { | |
1075 | cancel_work_sync(&priv->start_internal_scan); | |
1076 | cancel_work_sync(&priv->abort_scan); | |
1077 | cancel_work_sync(&priv->scan_completed); | |
1078 | ||
1079 | if (cancel_delayed_work_sync(&priv->scan_check)) { | |
b1eea297 | 1080 | mutex_lock(&priv->mutex); |
e7e16b90 | 1081 | iwl_force_scan_end(priv); |
b1eea297 | 1082 | mutex_unlock(&priv->mutex); |
e7e16b90 SG |
1083 | } |
1084 | } |