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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
20void 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_get_sync(wl->dev);
57 if (ret < 0) {
58 pm_runtime_put_noidle(wl->dev);
59 goto out;
60 }
61
62 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
63 /* restore hardware connection monitoring template */
64 wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
65 }
66
67 if (wl->scan.failed) {
68 wl1271_info("Scan completed due to error.");
69 wl12xx_queue_recovery_work(wl);
70 }
71
72 wlcore_cmd_regdomain_config_locked(wl);
73
74 pm_runtime_mark_last_busy(wl->dev);
75 pm_runtime_put_autosuspend(wl->dev);
76
77 ieee80211_scan_completed(wl->hw, &info);
78
79out:
80 mutex_unlock(&wl->mutex);
81
82}
83
84static void wlcore_started_vifs_iter(void *data, u8 *mac,
85 struct ieee80211_vif *vif)
86{
87 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
88 bool active = false;
89 int *count = (int *)data;
90
91 /*
92 * count active interfaces according to interface type.
93 * checking only bss_conf.idle is bad for some cases, e.g.
94 * we don't want to count sta in p2p_find as active interface.
95 */
96 switch (wlvif->bss_type) {
97 case BSS_TYPE_STA_BSS:
98 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
99 active = true;
100 break;
101
102 case BSS_TYPE_AP_BSS:
103 if (wlvif->wl->active_sta_count > 0)
104 active = true;
105 break;
106
107 default:
108 break;
109 }
110
111 if (active)
112 (*count)++;
113}
114
115static int wlcore_count_started_vifs(struct wl1271 *wl)
116{
117 int count = 0;
118
119 ieee80211_iterate_active_interfaces_atomic(wl->hw,
120 IEEE80211_IFACE_ITER_RESUME_ALL,
121 wlcore_started_vifs_iter, &count);
122 return count;
123}
124
125static int
126wlcore_scan_get_channels(struct wl1271 *wl,
127 struct ieee80211_channel *req_channels[],
128 u32 n_channels,
129 u32 n_ssids,
130 struct conn_scan_ch_params *channels,
131 u32 band, bool radar, bool passive,
132 int start, int max_channels,
133 u8 *n_pactive_ch,
134 int scan_type)
135{
136 int i, j;
137 u32 flags;
138 bool force_passive = !n_ssids;
139 u32 min_dwell_time_active, max_dwell_time_active;
140 u32 dwell_time_passive, dwell_time_dfs;
141
142 /* configure dwell times according to scan type */
143 if (scan_type == SCAN_TYPE_SEARCH) {
144 struct conf_scan_settings *c = &wl->conf.scan;
145 bool active_vif_exists = !!wlcore_count_started_vifs(wl);
146
147 min_dwell_time_active = active_vif_exists ?
148 c->min_dwell_time_active :
149 c->min_dwell_time_active_long;
150 max_dwell_time_active = active_vif_exists ?
151 c->max_dwell_time_active :
152 c->max_dwell_time_active_long;
153 dwell_time_passive = c->dwell_time_passive;
154 dwell_time_dfs = c->dwell_time_dfs;
155 } else {
156 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
157 u32 delta_per_probe;
158
159 if (band == NL80211_BAND_5GHZ)
160 delta_per_probe = c->dwell_time_delta_per_probe_5;
161 else
162 delta_per_probe = c->dwell_time_delta_per_probe;
163
164 min_dwell_time_active = c->base_dwell_time +
165 n_ssids * c->num_probe_reqs * delta_per_probe;
166
167 max_dwell_time_active = min_dwell_time_active +
168 c->max_dwell_time_delta;
169 dwell_time_passive = c->dwell_time_passive;
170 dwell_time_dfs = c->dwell_time_dfs;
171 }
172 min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
173 max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
174 dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000);
175 dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
176
177 for (i = 0, j = start;
178 i < n_channels && j < max_channels;
179 i++) {
180 flags = req_channels[i]->flags;
181
182 if (force_passive)
183 flags |= IEEE80211_CHAN_NO_IR;
184
185 if ((req_channels[i]->band == band) &&
186 !(flags & IEEE80211_CHAN_DISABLED) &&
187 (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
188 /* if radar is set, we ignore the passive flag */
189 (radar ||
190 !!(flags & IEEE80211_CHAN_NO_IR) == passive)) {
191 if (flags & IEEE80211_CHAN_RADAR) {
192 channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
193
194 channels[j].passive_duration =
195 cpu_to_le16(dwell_time_dfs);
196 } else {
197 channels[j].passive_duration =
198 cpu_to_le16(dwell_time_passive);
199 }
200
201 channels[j].min_duration =
202 cpu_to_le16(min_dwell_time_active);
203 channels[j].max_duration =
204 cpu_to_le16(max_dwell_time_active);
205
206 channels[j].tx_power_att = req_channels[i]->max_power;
207 channels[j].channel = req_channels[i]->hw_value;
208
209 if (n_pactive_ch &&
210 (band == NL80211_BAND_2GHZ) &&
211 (channels[j].channel >= 12) &&
212 (channels[j].channel <= 14) &&
213 (flags & IEEE80211_CHAN_NO_IR) &&
214 !force_passive) {
215 /* pactive channels treated as DFS */
216 channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
217
218 /*
219 * n_pactive_ch is counted down from the end of
220 * the passive channel list
221 */
222 (*n_pactive_ch)++;
223 wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
224 *n_pactive_ch);
225 }
226
227 wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
228 req_channels[i]->center_freq,
229 req_channels[i]->hw_value,
230 req_channels[i]->flags,
231 req_channels[i]->max_power,
232 min_dwell_time_active,
233 max_dwell_time_active,
234 flags & IEEE80211_CHAN_RADAR ?
235 ", DFS" : "",
236 flags & IEEE80211_CHAN_NO_IR ?
237 ", NO-IR" : "");
238 j++;
239 }
240 }
241
242 return j - start;
243}
244
245bool
246wlcore_set_scan_chan_params(struct wl1271 *wl,
247 struct wlcore_scan_channels *cfg,
248 struct ieee80211_channel *channels[],
249 u32 n_channels,
250 u32 n_ssids,
251 int scan_type)
252{
253 u8 n_pactive_ch = 0;
254
255 cfg->passive[0] =
256 wlcore_scan_get_channels(wl,
257 channels,
258 n_channels,
259 n_ssids,
260 cfg->channels_2,
261 NL80211_BAND_2GHZ,
262 false, true, 0,
263 MAX_CHANNELS_2GHZ,
264 &n_pactive_ch,
265 scan_type);
266 cfg->active[0] =
267 wlcore_scan_get_channels(wl,
268 channels,
269 n_channels,
270 n_ssids,
271 cfg->channels_2,
272 NL80211_BAND_2GHZ,
273 false, false,
274 cfg->passive[0],
275 MAX_CHANNELS_2GHZ,
276 &n_pactive_ch,
277 scan_type);
278 cfg->passive[1] =
279 wlcore_scan_get_channels(wl,
280 channels,
281 n_channels,
282 n_ssids,
283 cfg->channels_5,
284 NL80211_BAND_5GHZ,
285 false, true, 0,
286 wl->max_channels_5,
287 &n_pactive_ch,
288 scan_type);
289 cfg->dfs =
290 wlcore_scan_get_channels(wl,
291 channels,
292 n_channels,
293 n_ssids,
294 cfg->channels_5,
295 NL80211_BAND_5GHZ,
296 true, true,
297 cfg->passive[1],
298 wl->max_channels_5,
299 &n_pactive_ch,
300 scan_type);
301 cfg->active[1] =
302 wlcore_scan_get_channels(wl,
303 channels,
304 n_channels,
305 n_ssids,
306 cfg->channels_5,
307 NL80211_BAND_5GHZ,
308 false, false,
309 cfg->passive[1] + cfg->dfs,
310 wl->max_channels_5,
311 &n_pactive_ch,
312 scan_type);
313
314 /* 802.11j channels are not supported yet */
315 cfg->passive[2] = 0;
316 cfg->active[2] = 0;
317
318 cfg->passive_active = n_pactive_ch;
319
320 wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
321 cfg->active[0], cfg->passive[0]);
322 wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
323 cfg->active[1], cfg->passive[1]);
324 wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
325
326 return cfg->passive[0] || cfg->active[0] ||
327 cfg->passive[1] || cfg->active[1] || cfg->dfs ||
328 cfg->passive[2] || cfg->active[2];
329}
330EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
331
332int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
333 const u8 *ssid, size_t ssid_len,
334 struct cfg80211_scan_request *req)
335{
336 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
337
338 /*
339 * cfg80211 should guarantee that we don't get more channels
340 * than what we have registered.
341 */
342 BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
343
344 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
345 return -EBUSY;
346
347 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
348
349 if (ssid_len && ssid) {
350 wl->scan.ssid_len = ssid_len;
351 memcpy(wl->scan.ssid, ssid, ssid_len);
352 } else {
353 wl->scan.ssid_len = 0;
354 }
355
356 wl->scan_wlvif = wlvif;
357 wl->scan.req = req;
358 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
359
360 /* we assume failure so that timeout scenarios are handled correctly */
361 wl->scan.failed = true;
362 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
363 msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
364
365 wl->ops->scan_start(wl, wlvif, req);
366
367 return 0;
368}
369/* Returns the scan type to be used or a negative value on error */
370int
371wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl,
372 struct wl12xx_vif *wlvif,
373 struct cfg80211_sched_scan_request *req)
374{
375 struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
376 struct cfg80211_match_set *sets = req->match_sets;
377 struct cfg80211_ssid *ssids = req->ssids;
378 int ret = 0, type, i, j, n_match_ssids = 0;
379
380 wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list");
381
382 /* count the match sets that contain SSIDs */
383 for (i = 0; i < req->n_match_sets; i++)
384 if (sets[i].ssid.ssid_len > 0)
385 n_match_ssids++;
386
387 /* No filter, no ssids or only bcast ssid */
388 if (!n_match_ssids &&
389 (!req->n_ssids ||
390 (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
391 type = SCAN_SSID_FILTER_ANY;
392 goto out;
393 }
394
395 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
396 if (!cmd) {
397 ret = -ENOMEM;
398 goto out;
399 }
400
401 cmd->role_id = wlvif->role_id;
402 if (!n_match_ssids) {
403 /* No filter, with ssids */
404 type = SCAN_SSID_FILTER_DISABLED;
405
406 for (i = 0; i < req->n_ssids; i++) {
407 cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
408 SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
409 cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
410 memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
411 ssids[i].ssid_len);
412 cmd->n_ssids++;
413 }
414 } else {
415 type = SCAN_SSID_FILTER_LIST;
416
417 /* Add all SSIDs from the filters */
418 for (i = 0; i < req->n_match_sets; i++) {
419 /* ignore sets without SSIDs */
420 if (!sets[i].ssid.ssid_len)
421 continue;
422
423 cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
424 cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
425 memcpy(cmd->ssids[cmd->n_ssids].ssid,
426 sets[i].ssid.ssid, sets[i].ssid.ssid_len);
427 cmd->n_ssids++;
428 }
429 if ((req->n_ssids > 1) ||
430 (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
431 /*
432 * Mark all the SSIDs passed in the SSID list as HIDDEN,
433 * so they're used in probe requests.
434 */
435 for (i = 0; i < req->n_ssids; i++) {
436 if (!req->ssids[i].ssid_len)
437 continue;
438
439 for (j = 0; j < cmd->n_ssids; j++)
440 if ((req->ssids[i].ssid_len ==
441 cmd->ssids[j].len) &&
442 !memcmp(req->ssids[i].ssid,
443 cmd->ssids[j].ssid,
444 req->ssids[i].ssid_len)) {
445 cmd->ssids[j].type =
446 SCAN_SSID_TYPE_HIDDEN;
447 break;
448 }
449 /* Fail if SSID isn't present in the filters */
450 if (j == cmd->n_ssids) {
451 ret = -EINVAL;
452 goto out_free;
453 }
454 }
455 }
456 }
457
458 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
459 sizeof(*cmd), 0);
460 if (ret < 0) {
461 wl1271_error("cmd sched scan ssid list failed");
462 goto out_free;
463 }
464
465out_free:
466 kfree(cmd);
467out:
468 if (ret < 0)
469 return ret;
470 return type;
471}
472EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list);
473
474void wlcore_scan_sched_scan_results(struct wl1271 *wl)
475{
476 wl1271_debug(DEBUG_SCAN, "got periodic scan results");
477
478 ieee80211_sched_scan_results(wl->hw);
479}
480EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results);