Commit | Line | Data |
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78e28062 EP |
1 | /* |
2 | * This file is part of wl12xx | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * version 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/ieee80211.h> | |
23 | #include "scan.h" | |
24 | #include "../wlcore/debug.h" | |
25 | #include "../wlcore/tx.h" | |
26 | ||
27 | static int wl1271_get_scan_channels(struct wl1271 *wl, | |
28 | struct cfg80211_scan_request *req, | |
29 | struct basic_scan_channel_params *channels, | |
30 | enum ieee80211_band band, bool passive) | |
31 | { | |
32 | struct conf_scan_settings *c = &wl->conf.scan; | |
33 | int i, j; | |
34 | u32 flags; | |
35 | ||
36 | for (i = 0, j = 0; | |
37 | i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS; | |
38 | i++) { | |
39 | flags = req->channels[i]->flags; | |
40 | ||
41 | if (!test_bit(i, wl->scan.scanned_ch) && | |
42 | !(flags & IEEE80211_CHAN_DISABLED) && | |
43 | (req->channels[i]->band == band) && | |
44 | /* | |
45 | * In passive scans, we scan all remaining | |
46 | * channels, even if not marked as such. | |
47 | * In active scans, we only scan channels not | |
48 | * marked as passive. | |
49 | */ | |
50 | (passive || !(flags & IEEE80211_CHAN_PASSIVE_SCAN))) { | |
51 | wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ", | |
52 | req->channels[i]->band, | |
53 | req->channels[i]->center_freq); | |
54 | wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X", | |
55 | req->channels[i]->hw_value, | |
56 | req->channels[i]->flags); | |
57 | wl1271_debug(DEBUG_SCAN, | |
58 | "max_antenna_gain %d, max_power %d", | |
59 | req->channels[i]->max_antenna_gain, | |
60 | req->channels[i]->max_power); | |
61 | wl1271_debug(DEBUG_SCAN, "beacon_found %d", | |
62 | req->channels[i]->beacon_found); | |
63 | ||
64 | if (!passive) { | |
65 | channels[j].min_duration = | |
66 | cpu_to_le32(c->min_dwell_time_active); | |
67 | channels[j].max_duration = | |
68 | cpu_to_le32(c->max_dwell_time_active); | |
69 | } else { | |
70 | channels[j].min_duration = | |
7c482c10 | 71 | cpu_to_le32(c->dwell_time_passive); |
78e28062 | 72 | channels[j].max_duration = |
7c482c10 | 73 | cpu_to_le32(c->dwell_time_passive); |
78e28062 EP |
74 | } |
75 | channels[j].early_termination = 0; | |
76 | channels[j].tx_power_att = req->channels[i]->max_power; | |
77 | channels[j].channel = req->channels[i]->hw_value; | |
78 | ||
79 | memset(&channels[j].bssid_lsb, 0xff, 4); | |
80 | memset(&channels[j].bssid_msb, 0xff, 2); | |
81 | ||
82 | /* Mark the channels we already used */ | |
83 | set_bit(i, wl->scan.scanned_ch); | |
84 | ||
85 | j++; | |
86 | } | |
87 | } | |
88 | ||
89 | return j; | |
90 | } | |
91 | ||
92 | #define WL1271_NOTHING_TO_SCAN 1 | |
93 | ||
94 | static int wl1271_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif, | |
95 | enum ieee80211_band band, | |
96 | bool passive, u32 basic_rate) | |
97 | { | |
98 | struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif); | |
99 | struct wl1271_cmd_scan *cmd; | |
100 | struct wl1271_cmd_trigger_scan_to *trigger; | |
101 | int ret; | |
102 | u16 scan_options = 0; | |
103 | ||
104 | /* skip active scans if we don't have SSIDs */ | |
105 | if (!passive && wl->scan.req->n_ssids == 0) | |
106 | return WL1271_NOTHING_TO_SCAN; | |
107 | ||
108 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); | |
109 | trigger = kzalloc(sizeof(*trigger), GFP_KERNEL); | |
110 | if (!cmd || !trigger) { | |
111 | ret = -ENOMEM; | |
112 | goto out; | |
113 | } | |
114 | ||
115 | if (wl->conf.scan.split_scan_timeout) | |
116 | scan_options |= WL1271_SCAN_OPT_SPLIT_SCAN; | |
117 | ||
118 | if (passive) | |
119 | scan_options |= WL1271_SCAN_OPT_PASSIVE; | |
120 | ||
121 | cmd->params.role_id = wlvif->role_id; | |
122 | ||
123 | if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) { | |
124 | ret = -EINVAL; | |
125 | goto out; | |
126 | } | |
127 | ||
128 | cmd->params.scan_options = cpu_to_le16(scan_options); | |
129 | ||
130 | cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req, | |
131 | cmd->channels, | |
132 | band, passive); | |
133 | if (cmd->params.n_ch == 0) { | |
134 | ret = WL1271_NOTHING_TO_SCAN; | |
135 | goto out; | |
136 | } | |
137 | ||
138 | cmd->params.tx_rate = cpu_to_le32(basic_rate); | |
139 | cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs; | |
140 | cmd->params.tid_trigger = CONF_TX_AC_ANY_TID; | |
141 | cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG; | |
142 | ||
143 | if (band == IEEE80211_BAND_2GHZ) | |
144 | cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ; | |
145 | else | |
146 | cmd->params.band = WL1271_SCAN_BAND_5_GHZ; | |
147 | ||
148 | if (wl->scan.ssid_len && wl->scan.ssid) { | |
149 | cmd->params.ssid_len = wl->scan.ssid_len; | |
150 | memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len); | |
151 | } | |
152 | ||
153 | memcpy(cmd->addr, vif->addr, ETH_ALEN); | |
154 | ||
155 | ret = wl12xx_cmd_build_probe_req(wl, wlvif, | |
156 | cmd->params.role_id, band, | |
157 | wl->scan.ssid, wl->scan.ssid_len, | |
158 | wl->scan.req->ie, | |
159 | wl->scan.req->ie_len, false); | |
160 | if (ret < 0) { | |
161 | wl1271_error("PROBE request template failed"); | |
162 | goto out; | |
163 | } | |
164 | ||
165 | trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout); | |
166 | ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger, | |
167 | sizeof(*trigger), 0); | |
168 | if (ret < 0) { | |
169 | wl1271_error("trigger scan to failed for hw scan"); | |
170 | goto out; | |
171 | } | |
172 | ||
173 | wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd)); | |
174 | ||
175 | ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0); | |
176 | if (ret < 0) { | |
177 | wl1271_error("SCAN failed"); | |
178 | goto out; | |
179 | } | |
180 | ||
181 | out: | |
182 | kfree(cmd); | |
183 | kfree(trigger); | |
184 | return ret; | |
185 | } | |
186 | ||
187 | int wl12xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif) | |
188 | { | |
189 | struct wl1271_cmd_header *cmd = NULL; | |
190 | int ret = 0; | |
191 | ||
192 | if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE)) | |
193 | return -EINVAL; | |
194 | ||
195 | wl1271_debug(DEBUG_CMD, "cmd scan stop"); | |
196 | ||
197 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); | |
198 | if (!cmd) { | |
199 | ret = -ENOMEM; | |
200 | goto out; | |
201 | } | |
202 | ||
203 | ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd, | |
204 | sizeof(*cmd), 0); | |
205 | if (ret < 0) { | |
206 | wl1271_error("cmd stop_scan failed"); | |
207 | goto out; | |
208 | } | |
209 | out: | |
210 | kfree(cmd); | |
211 | return ret; | |
212 | } | |
213 | ||
214 | void wl1271_scan_stm(struct wl1271 *wl, struct wl12xx_vif *wlvif) | |
215 | { | |
216 | int ret = 0; | |
217 | enum ieee80211_band band; | |
218 | u32 rate, mask; | |
219 | ||
220 | switch (wl->scan.state) { | |
221 | case WL1271_SCAN_STATE_IDLE: | |
222 | break; | |
223 | ||
224 | case WL1271_SCAN_STATE_2GHZ_ACTIVE: | |
225 | band = IEEE80211_BAND_2GHZ; | |
226 | mask = wlvif->bitrate_masks[band]; | |
227 | if (wl->scan.req->no_cck) { | |
228 | mask &= ~CONF_TX_CCK_RATES; | |
229 | if (!mask) | |
230 | mask = CONF_TX_RATE_MASK_BASIC_P2P; | |
231 | } | |
232 | rate = wl1271_tx_min_rate_get(wl, mask); | |
233 | ret = wl1271_scan_send(wl, wlvif, band, false, rate); | |
234 | if (ret == WL1271_NOTHING_TO_SCAN) { | |
235 | wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE; | |
236 | wl1271_scan_stm(wl, wlvif); | |
237 | } | |
238 | ||
239 | break; | |
240 | ||
241 | case WL1271_SCAN_STATE_2GHZ_PASSIVE: | |
242 | band = IEEE80211_BAND_2GHZ; | |
243 | mask = wlvif->bitrate_masks[band]; | |
244 | if (wl->scan.req->no_cck) { | |
245 | mask &= ~CONF_TX_CCK_RATES; | |
246 | if (!mask) | |
247 | mask = CONF_TX_RATE_MASK_BASIC_P2P; | |
248 | } | |
249 | rate = wl1271_tx_min_rate_get(wl, mask); | |
250 | ret = wl1271_scan_send(wl, wlvif, band, true, rate); | |
251 | if (ret == WL1271_NOTHING_TO_SCAN) { | |
252 | if (wl->enable_11a) | |
253 | wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE; | |
254 | else | |
255 | wl->scan.state = WL1271_SCAN_STATE_DONE; | |
256 | wl1271_scan_stm(wl, wlvif); | |
257 | } | |
258 | ||
259 | break; | |
260 | ||
261 | case WL1271_SCAN_STATE_5GHZ_ACTIVE: | |
262 | band = IEEE80211_BAND_5GHZ; | |
263 | rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]); | |
264 | ret = wl1271_scan_send(wl, wlvif, band, false, rate); | |
265 | if (ret == WL1271_NOTHING_TO_SCAN) { | |
266 | wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE; | |
267 | wl1271_scan_stm(wl, wlvif); | |
268 | } | |
269 | ||
270 | break; | |
271 | ||
272 | case WL1271_SCAN_STATE_5GHZ_PASSIVE: | |
273 | band = IEEE80211_BAND_5GHZ; | |
274 | rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]); | |
275 | ret = wl1271_scan_send(wl, wlvif, band, true, rate); | |
276 | if (ret == WL1271_NOTHING_TO_SCAN) { | |
277 | wl->scan.state = WL1271_SCAN_STATE_DONE; | |
278 | wl1271_scan_stm(wl, wlvif); | |
279 | } | |
280 | ||
281 | break; | |
282 | ||
283 | case WL1271_SCAN_STATE_DONE: | |
284 | wl->scan.failed = false; | |
285 | cancel_delayed_work(&wl->scan_complete_work); | |
286 | ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, | |
287 | msecs_to_jiffies(0)); | |
288 | break; | |
289 | ||
290 | default: | |
291 | wl1271_error("invalid scan state"); | |
292 | break; | |
293 | } | |
294 | ||
295 | if (ret < 0) { | |
296 | cancel_delayed_work(&wl->scan_complete_work); | |
297 | ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work, | |
298 | msecs_to_jiffies(0)); | |
299 | } | |
300 | } | |
301 | ||
302 | static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd, | |
303 | struct wlcore_scan_channels *cmd_channels) | |
304 | { | |
305 | memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive)); | |
306 | memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active)); | |
307 | cmd->dfs = cmd_channels->dfs; | |
308 | cmd->n_pactive_ch = cmd_channels->passive_active; | |
309 | ||
310 | memcpy(cmd->channels_2, cmd_channels->channels_2, | |
311 | sizeof(cmd->channels_2)); | |
312 | memcpy(cmd->channels_5, cmd_channels->channels_5, | |
a805de4d | 313 | sizeof(cmd->channels_5)); |
78e28062 EP |
314 | /* channels_4 are not supported, so no need to copy them */ |
315 | } | |
316 | ||
317 | int wl1271_scan_sched_scan_config(struct wl1271 *wl, | |
318 | struct wl12xx_vif *wlvif, | |
319 | struct cfg80211_sched_scan_request *req, | |
320 | struct ieee80211_sched_scan_ies *ies) | |
321 | { | |
322 | struct wl1271_cmd_sched_scan_config *cfg = NULL; | |
323 | struct wlcore_scan_channels *cfg_channels = NULL; | |
324 | struct conf_sched_scan_settings *c = &wl->conf.sched_scan; | |
325 | int i, ret; | |
326 | bool force_passive = !req->n_ssids; | |
327 | ||
328 | wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config"); | |
329 | ||
330 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
331 | if (!cfg) | |
332 | return -ENOMEM; | |
333 | ||
334 | cfg->role_id = wlvif->role_id; | |
335 | cfg->rssi_threshold = c->rssi_threshold; | |
336 | cfg->snr_threshold = c->snr_threshold; | |
337 | cfg->n_probe_reqs = c->num_probe_reqs; | |
338 | /* cycles set to 0 it means infinite (until manually stopped) */ | |
339 | cfg->cycles = 0; | |
340 | /* report APs when at least 1 is found */ | |
341 | cfg->report_after = 1; | |
342 | /* don't stop scanning automatically when something is found */ | |
343 | cfg->terminate = 0; | |
344 | cfg->tag = WL1271_SCAN_DEFAULT_TAG; | |
345 | /* don't filter on BSS type */ | |
346 | cfg->bss_type = SCAN_BSS_TYPE_ANY; | |
347 | /* currently NL80211 supports only a single interval */ | |
348 | for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++) | |
349 | cfg->intervals[i] = cpu_to_le32(req->interval); | |
350 | ||
351 | cfg->ssid_len = 0; | |
352 | ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req); | |
353 | if (ret < 0) | |
354 | goto out; | |
355 | ||
356 | cfg->filter_type = ret; | |
357 | ||
358 | wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type); | |
359 | ||
360 | cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL); | |
361 | if (!cfg_channels) { | |
362 | ret = -ENOMEM; | |
363 | goto out; | |
364 | } | |
365 | ||
366 | if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels, | |
7c482c10 EP |
367 | req->n_channels, req->n_ssids, |
368 | SCAN_TYPE_PERIODIC)) { | |
78e28062 EP |
369 | wl1271_error("scan channel list is empty"); |
370 | ret = -EINVAL; | |
371 | goto out; | |
372 | } | |
373 | wl12xx_adjust_channels(cfg, cfg_channels); | |
374 | ||
375 | if (!force_passive && cfg->active[0]) { | |
376 | u8 band = IEEE80211_BAND_2GHZ; | |
377 | ret = wl12xx_cmd_build_probe_req(wl, wlvif, | |
378 | wlvif->role_id, band, | |
379 | req->ssids[0].ssid, | |
380 | req->ssids[0].ssid_len, | |
381 | ies->ie[band], | |
382 | ies->len[band], true); | |
383 | if (ret < 0) { | |
384 | wl1271_error("2.4GHz PROBE request template failed"); | |
385 | goto out; | |
386 | } | |
387 | } | |
388 | ||
389 | if (!force_passive && cfg->active[1]) { | |
390 | u8 band = IEEE80211_BAND_5GHZ; | |
391 | ret = wl12xx_cmd_build_probe_req(wl, wlvif, | |
392 | wlvif->role_id, band, | |
393 | req->ssids[0].ssid, | |
394 | req->ssids[0].ssid_len, | |
395 | ies->ie[band], | |
396 | ies->len[band], true); | |
397 | if (ret < 0) { | |
398 | wl1271_error("5GHz PROBE request template failed"); | |
399 | goto out; | |
400 | } | |
401 | } | |
402 | ||
403 | wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg)); | |
404 | ||
405 | ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg, | |
406 | sizeof(*cfg), 0); | |
407 | if (ret < 0) { | |
408 | wl1271_error("SCAN configuration failed"); | |
409 | goto out; | |
410 | } | |
411 | out: | |
412 | kfree(cfg_channels); | |
413 | kfree(cfg); | |
414 | return ret; | |
415 | } | |
416 | ||
417 | int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif) | |
418 | { | |
419 | struct wl1271_cmd_sched_scan_start *start; | |
420 | int ret = 0; | |
421 | ||
422 | wl1271_debug(DEBUG_CMD, "cmd periodic scan start"); | |
423 | ||
424 | if (wlvif->bss_type != BSS_TYPE_STA_BSS) | |
425 | return -EOPNOTSUPP; | |
426 | ||
427 | if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) && | |
428 | test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags)) | |
429 | return -EBUSY; | |
430 | ||
431 | start = kzalloc(sizeof(*start), GFP_KERNEL); | |
432 | if (!start) | |
433 | return -ENOMEM; | |
434 | ||
435 | start->role_id = wlvif->role_id; | |
436 | start->tag = WL1271_SCAN_DEFAULT_TAG; | |
437 | ||
438 | ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start, | |
439 | sizeof(*start), 0); | |
440 | if (ret < 0) { | |
441 | wl1271_error("failed to send scan start command"); | |
442 | goto out_free; | |
443 | } | |
444 | ||
445 | out_free: | |
446 | kfree(start); | |
447 | return ret; | |
448 | } | |
449 | ||
450 | int wl12xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif, | |
451 | struct cfg80211_sched_scan_request *req, | |
452 | struct ieee80211_sched_scan_ies *ies) | |
453 | { | |
454 | int ret; | |
455 | ||
456 | ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies); | |
457 | if (ret < 0) | |
458 | return ret; | |
459 | ||
460 | return wl1271_scan_sched_scan_start(wl, wlvif); | |
461 | } | |
462 | ||
463 | void wl12xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif) | |
464 | { | |
465 | struct wl1271_cmd_sched_scan_stop *stop; | |
466 | int ret = 0; | |
467 | ||
468 | wl1271_debug(DEBUG_CMD, "cmd periodic scan stop"); | |
469 | ||
470 | /* FIXME: what to do if alloc'ing to stop fails? */ | |
471 | stop = kzalloc(sizeof(*stop), GFP_KERNEL); | |
472 | if (!stop) { | |
473 | wl1271_error("failed to alloc memory to send sched scan stop"); | |
474 | return; | |
475 | } | |
476 | ||
477 | stop->role_id = wlvif->role_id; | |
478 | stop->tag = WL1271_SCAN_DEFAULT_TAG; | |
479 | ||
480 | ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop, | |
481 | sizeof(*stop), 0); | |
482 | if (ret < 0) { | |
483 | wl1271_error("failed to send sched scan stop command"); | |
484 | goto out_free; | |
485 | } | |
486 | ||
487 | out_free: | |
488 | kfree(stop); | |
489 | } | |
490 | ||
491 | int wl12xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif, | |
492 | struct cfg80211_scan_request *req) | |
493 | { | |
494 | wl1271_scan_stm(wl, wlvif); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | void wl12xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif) | |
499 | { | |
500 | wl1271_scan_stm(wl, wlvif); | |
501 | } |