1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file is part of wl1271
4 *
5 * Copyright (C) 2009-2010 Nokia Corporation
6 *
7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 */
9
10 #include <linux/ieee80211.h>
11 #include <linux/pm_runtime.h>
12
13 #include "wlcore.h"
14 #include "debug.h"
15 #include "cmd.h"
16 #include "scan.h"
17 #include "acx.h"
18 #include "tx.h"
19
wl1271_scan_complete_work(struct work_struct * work)20 void wl1271_scan_complete_work(struct work_struct *work)
21 {
22 struct delayed_work *dwork;
23 struct wl1271 *wl;
24 struct wl12xx_vif *wlvif;
25 struct cfg80211_scan_info info = {
26 .aborted = false,
27 };
28 int ret;
29
30 dwork = to_delayed_work(work);
31 wl = container_of(dwork, struct wl1271, scan_complete_work);
32
33 wl1271_debug(DEBUG_SCAN, "Scanning complete");
34
35 mutex_lock(&wl->mutex);
36
37 if (unlikely(wl->state != WLCORE_STATE_ON))
38 goto out;
39
40 if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
41 goto out;
42
43 wlvif = wl->scan_wlvif;
44
45 /*
46 * Rearm the tx watchdog just before idling scan. This
47 * prevents just-finished scans from triggering the watchdog
48 */
49 wl12xx_rearm_tx_watchdog_locked(wl);
50
51 wl->scan.state = WL1271_SCAN_STATE_IDLE;
52 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
53 wl->scan.req = NULL;
54 wl->scan_wlvif = NULL;
55
56 ret = pm_runtime_resume_and_get(wl->dev);
57 if (ret < 0)
58 goto out;
59
60 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
61 /* restore hardware connection monitoring template */
62 wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
63 }
64
65 if (wl->scan.failed) {
66 wl1271_info("Scan completed due to error.");
67 wl12xx_queue_recovery_work(wl);
68 }
69
70 wlcore_cmd_regdomain_config_locked(wl);
71
72 pm_runtime_put_autosuspend(wl->dev);
73
74 ieee80211_scan_completed(wl->hw, &info);
75
76 out:
77 mutex_unlock(&wl->mutex);
78
79 }
80
wlcore_started_vifs_iter(void * data,u8 * mac,struct ieee80211_vif * vif)81 static void wlcore_started_vifs_iter(void *data, u8 *mac,
82 struct ieee80211_vif *vif)
83 {
84 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
85 bool active = false;
86 int *count = (int *)data;
87
88 /*
89 * count active interfaces according to interface type.
90 * checking only bss_conf.idle is bad for some cases, e.g.
91 * we don't want to count sta in p2p_find as active interface.
92 */
93 switch (wlvif->bss_type) {
94 case BSS_TYPE_STA_BSS:
95 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
96 active = true;
97 break;
98
99 case BSS_TYPE_AP_BSS:
100 if (wlvif->wl->active_sta_count > 0)
101 active = true;
102 break;
103
104 default:
105 break;
106 }
107
108 if (active)
109 (*count)++;
110 }
111
wlcore_count_started_vifs(struct wl1271 * wl)112 static int wlcore_count_started_vifs(struct wl1271 *wl)
113 {
114 int count = 0;
115
116 ieee80211_iterate_active_interfaces_atomic(wl->hw,
117 IEEE80211_IFACE_ITER_RESUME_ALL,
118 wlcore_started_vifs_iter, &count);
119 return count;
120 }
121
122 static int
wlcore_scan_get_channels(struct wl1271 * wl,struct ieee80211_channel * req_channels[],u32 n_channels,u32 n_ssids,struct conn_scan_ch_params * channels,u32 band,bool radar,bool passive,int start,int max_channels,u8 * n_pactive_ch,int scan_type)123 wlcore_scan_get_channels(struct wl1271 *wl,
124 struct ieee80211_channel *req_channels[],
125 u32 n_channels,
126 u32 n_ssids,
127 struct conn_scan_ch_params *channels,
128 u32 band, bool radar, bool passive,
129 int start, int max_channels,
130 u8 *n_pactive_ch,
131 int scan_type)
132 {
133 int i, j;
134 u32 flags;
135 bool force_passive = !n_ssids;
136 u32 min_dwell_time_active, max_dwell_time_active;
137 u32 dwell_time_passive, dwell_time_dfs;
138
139 /* configure dwell times according to scan type */
140 if (scan_type == SCAN_TYPE_SEARCH) {
141 struct conf_scan_settings *c = &wl->conf.scan;
142 bool active_vif_exists = !!wlcore_count_started_vifs(wl);
143
144 min_dwell_time_active = active_vif_exists ?
145 c->min_dwell_time_active :
146 c->min_dwell_time_active_long;
147 max_dwell_time_active = active_vif_exists ?
148 c->max_dwell_time_active :
149 c->max_dwell_time_active_long;
150 dwell_time_passive = c->dwell_time_passive;
151 dwell_time_dfs = c->dwell_time_dfs;
152 } else {
153 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
154 u32 delta_per_probe;
155
156 if (band == NL80211_BAND_5GHZ)
157 delta_per_probe = c->dwell_time_delta_per_probe_5;
158 else
159 delta_per_probe = c->dwell_time_delta_per_probe;
160
161 min_dwell_time_active = c->base_dwell_time +
162 n_ssids * c->num_probe_reqs * delta_per_probe;
163
164 max_dwell_time_active = min_dwell_time_active +
165 c->max_dwell_time_delta;
166 dwell_time_passive = c->dwell_time_passive;
167 dwell_time_dfs = c->dwell_time_dfs;
168 }
169 min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
170 max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
171 dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000);
172 dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
173
174 for (i = 0, j = start;
175 i < n_channels && j < max_channels;
176 i++) {
177 flags = req_channels[i]->flags;
178
179 if (force_passive)
180 flags |= IEEE80211_CHAN_NO_IR;
181
182 if ((req_channels[i]->band == band) &&
183 !(flags & IEEE80211_CHAN_DISABLED) &&
184 (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
185 /* if radar is set, we ignore the passive flag */
186 (radar ||
187 !!(flags & IEEE80211_CHAN_NO_IR) == passive)) {
188 if (flags & IEEE80211_CHAN_RADAR) {
189 channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
190
191 channels[j].passive_duration =
192 cpu_to_le16(dwell_time_dfs);
193 } else {
194 channels[j].passive_duration =
195 cpu_to_le16(dwell_time_passive);
196 }
197
198 channels[j].min_duration =
199 cpu_to_le16(min_dwell_time_active);
200 channels[j].max_duration =
201 cpu_to_le16(max_dwell_time_active);
202
203 channels[j].tx_power_att = req_channels[i]->max_power;
204 channels[j].channel = req_channels[i]->hw_value;
205
206 if (n_pactive_ch &&
207 (band == NL80211_BAND_2GHZ) &&
208 (channels[j].channel >= 12) &&
209 (channels[j].channel <= 14) &&
210 (flags & IEEE80211_CHAN_NO_IR) &&
211 !force_passive) {
212 /* pactive channels treated as DFS */
213 channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
214
215 /*
216 * n_pactive_ch is counted down from the end of
217 * the passive channel list
218 */
219 (*n_pactive_ch)++;
220 wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
221 *n_pactive_ch);
222 }
223
224 wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
225 req_channels[i]->center_freq,
226 req_channels[i]->hw_value,
227 req_channels[i]->flags,
228 req_channels[i]->max_power,
229 min_dwell_time_active,
230 max_dwell_time_active,
231 flags & IEEE80211_CHAN_RADAR ?
232 ", DFS" : "",
233 flags & IEEE80211_CHAN_NO_IR ?
234 ", NO-IR" : "");
235 j++;
236 }
237 }
238
239 return j - start;
240 }
241
242 bool
wlcore_set_scan_chan_params(struct wl1271 * wl,struct wlcore_scan_channels * cfg,struct ieee80211_channel * channels[],u32 n_channels,u32 n_ssids,int scan_type)243 wlcore_set_scan_chan_params(struct wl1271 *wl,
244 struct wlcore_scan_channels *cfg,
245 struct ieee80211_channel *channels[],
246 u32 n_channels,
247 u32 n_ssids,
248 int scan_type)
249 {
250 u8 n_pactive_ch = 0;
251
252 cfg->passive[0] =
253 wlcore_scan_get_channels(wl,
254 channels,
255 n_channels,
256 n_ssids,
257 cfg->channels_2,
258 NL80211_BAND_2GHZ,
259 false, true, 0,
260 MAX_CHANNELS_2GHZ,
261 &n_pactive_ch,
262 scan_type);
263 cfg->active[0] =
264 wlcore_scan_get_channels(wl,
265 channels,
266 n_channels,
267 n_ssids,
268 cfg->channels_2,
269 NL80211_BAND_2GHZ,
270 false, false,
271 cfg->passive[0],
272 MAX_CHANNELS_2GHZ,
273 &n_pactive_ch,
274 scan_type);
275 cfg->passive[1] =
276 wlcore_scan_get_channels(wl,
277 channels,
278 n_channels,
279 n_ssids,
280 cfg->channels_5,
281 NL80211_BAND_5GHZ,
282 false, true, 0,
283 wl->max_channels_5,
284 &n_pactive_ch,
285 scan_type);
286 cfg->dfs =
287 wlcore_scan_get_channels(wl,
288 channels,
289 n_channels,
290 n_ssids,
291 cfg->channels_5,
292 NL80211_BAND_5GHZ,
293 true, true,
294 cfg->passive[1],
295 wl->max_channels_5,
296 &n_pactive_ch,
297 scan_type);
298 cfg->active[1] =
299 wlcore_scan_get_channels(wl,
300 channels,
301 n_channels,
302 n_ssids,
303 cfg->channels_5,
304 NL80211_BAND_5GHZ,
305 false, false,
306 cfg->passive[1] + cfg->dfs,
307 wl->max_channels_5,
308 &n_pactive_ch,
309 scan_type);
310
311 /* 802.11j channels are not supported yet */
312 cfg->passive[2] = 0;
313 cfg->active[2] = 0;
314
315 cfg->passive_active = n_pactive_ch;
316
317 wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
318 cfg->active[0], cfg->passive[0]);
319 wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
320 cfg->active[1], cfg->passive[1]);
321 wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
322
323 return cfg->passive[0] || cfg->active[0] ||
324 cfg->passive[1] || cfg->active[1] || cfg->dfs ||
325 cfg->passive[2] || cfg->active[2];
326 }
327 EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
328
wlcore_scan(struct wl1271 * wl,struct ieee80211_vif * vif,const u8 * ssid,size_t ssid_len,struct cfg80211_scan_request * req)329 int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
330 const u8 *ssid, size_t ssid_len,
331 struct cfg80211_scan_request *req)
332 {
333 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
334
335 /*
336 * cfg80211 should guarantee that we don't get more channels
337 * than what we have registered.
338 */
339 BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
340
341 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
342 return -EBUSY;
343
344 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
345
346 if (ssid_len && ssid) {
347 wl->scan.ssid_len = ssid_len;
348 memcpy(wl->scan.ssid, ssid, ssid_len);
349 } else {
350 wl->scan.ssid_len = 0;
351 }
352
353 wl->scan_wlvif = wlvif;
354 wl->scan.req = req;
355 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
356
357 /* we assume failure so that timeout scenarios are handled correctly */
358 wl->scan.failed = true;
359 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
360 msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
361
362 wl->ops->scan_start(wl, wlvif, req);
363
364 return 0;
365 }
366 /* Returns the scan type to be used or a negative value on error */
367 int
wlcore_scan_sched_scan_ssid_list(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req)368 wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl,
369 struct wl12xx_vif *wlvif,
370 struct cfg80211_sched_scan_request *req)
371 {
372 struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
373 struct cfg80211_match_set *sets = req->match_sets;
374 struct cfg80211_ssid *ssids = req->ssids;
375 int ret = 0, type, i, j, n_match_ssids = 0;
376
377 wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list");
378
379 /* count the match sets that contain SSIDs */
380 for (i = 0; i < req->n_match_sets; i++)
381 if (sets[i].ssid.ssid_len > 0)
382 n_match_ssids++;
383
384 /* No filter, no ssids or only bcast ssid */
385 if (!n_match_ssids &&
386 (!req->n_ssids ||
387 (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
388 type = SCAN_SSID_FILTER_ANY;
389 goto out;
390 }
391
392 cmd = kzalloc_obj(*cmd);
393 if (!cmd) {
394 ret = -ENOMEM;
395 goto out;
396 }
397
398 cmd->role_id = wlvif->role_id;
399 if (!n_match_ssids) {
400 /* No filter, with ssids */
401 type = SCAN_SSID_FILTER_DISABLED;
402
403 for (i = 0; i < req->n_ssids; i++) {
404 cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
405 SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
406 cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
407 memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
408 ssids[i].ssid_len);
409 cmd->n_ssids++;
410 }
411 } else {
412 type = SCAN_SSID_FILTER_LIST;
413
414 /* Add all SSIDs from the filters */
415 for (i = 0; i < req->n_match_sets; i++) {
416 /* ignore sets without SSIDs */
417 if (!sets[i].ssid.ssid_len)
418 continue;
419
420 cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
421 cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
422 memcpy(cmd->ssids[cmd->n_ssids].ssid,
423 sets[i].ssid.ssid, sets[i].ssid.ssid_len);
424 cmd->n_ssids++;
425 }
426 if ((req->n_ssids > 1) ||
427 (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
428 /*
429 * Mark all the SSIDs passed in the SSID list as HIDDEN,
430 * so they're used in probe requests.
431 */
432 for (i = 0; i < req->n_ssids; i++) {
433 if (!req->ssids[i].ssid_len)
434 continue;
435
436 for (j = 0; j < cmd->n_ssids; j++)
437 if ((req->ssids[i].ssid_len ==
438 cmd->ssids[j].len) &&
439 !memcmp(req->ssids[i].ssid,
440 cmd->ssids[j].ssid,
441 req->ssids[i].ssid_len)) {
442 cmd->ssids[j].type =
443 SCAN_SSID_TYPE_HIDDEN;
444 break;
445 }
446 /* Fail if SSID isn't present in the filters */
447 if (j == cmd->n_ssids) {
448 ret = -EINVAL;
449 goto out_free;
450 }
451 }
452 }
453 }
454
455 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
456 sizeof(*cmd), 0);
457 if (ret < 0) {
458 wl1271_error("cmd sched scan ssid list failed");
459 goto out_free;
460 }
461
462 out_free:
463 kfree(cmd);
464 out:
465 if (ret < 0)
466 return ret;
467 return type;
468 }
469 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list);
470
wlcore_scan_sched_scan_results(struct wl1271 * wl)471 void wlcore_scan_sched_scan_results(struct wl1271 *wl)
472 {
473 wl1271_debug(DEBUG_SCAN, "got periodic scan results");
474
475 ieee80211_sched_scan_results(wl->hw);
476 }
477 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results);
478