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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / ti / wlcore / scan.c
blob1e3d51cd673ab6d2be132c6fda17f698547b3ff7
1 /*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2009-2010 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24 #include <linux/ieee80211.h>
25
26 #include "wlcore.h"
27 #include "debug.h"
28 #include "cmd.h"
29 #include "scan.h"
30 #include "acx.h"
31 #include "ps.h"
32 #include "tx.h"
33
34 void wl1271_scan_complete_work(struct work_struct *work)
35 {
36 struct delayed_work *dwork;
37 struct wl1271 *wl;
38 struct wl12xx_vif *wlvif;
39 int ret;
40
41 dwork = container_of(work, struct delayed_work, work);
42 wl = container_of(dwork, struct wl1271, scan_complete_work);
43
44 wl1271_debug(DEBUG_SCAN, "Scanning complete");
45
46 mutex_lock(&wl->mutex);
47
48 if (unlikely(wl->state != WLCORE_STATE_ON))
49 goto out;
50
51 if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
52 goto out;
53
54 wlvif = wl->scan_wlvif;
55
56 /*
57 * Rearm the tx watchdog just before idling scan. This
58 * prevents just-finished scans from triggering the watchdog
59 */
60 wl12xx_rearm_tx_watchdog_locked(wl);
61
62 wl->scan.state = WL1271_SCAN_STATE_IDLE;
63 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
64 wl->scan.req = NULL;
65 wl->scan_wlvif = NULL;
66
67 ret = wl1271_ps_elp_wakeup(wl);
68 if (ret < 0)
69 goto out;
70
71 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
72 /* restore hardware connection monitoring template */
73 wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
74 }
75
76 wl1271_ps_elp_sleep(wl);
77
78 if (wl->scan.failed) {
79 wl1271_info("Scan completed due to error.");
80 wl12xx_queue_recovery_work(wl);
81 }
82
83 wlcore_cmd_regdomain_config_locked(wl);
84
85 ieee80211_scan_completed(wl->hw, false);
86
87 out:
88 mutex_unlock(&wl->mutex);
89
90 }
91
92 static void wlcore_started_vifs_iter(void *data, u8 *mac,
93 struct ieee80211_vif *vif)
94 {
95 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
96 bool active = false;
97 int *count = (int *)data;
98
99 /*
100 * count active interfaces according to interface type.
101 * checking only bss_conf.idle is bad for some cases, e.g.
102 * we don't want to count sta in p2p_find as active interface.
103 */
104 switch (wlvif->bss_type) {
105 case BSS_TYPE_STA_BSS:
106 if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
107 active = true;
108 break;
109
110 case BSS_TYPE_AP_BSS:
111 if (wlvif->wl->active_sta_count > 0)
112 active = true;
113 break;
114
115 default:
116 break;
117 }
118
119 if (active)
120 (*count)++;
121 }
122
123 static int wlcore_count_started_vifs(struct wl1271 *wl)
124 {
125 int count = 0;
126
127 ieee80211_iterate_active_interfaces_atomic(wl->hw,
128 IEEE80211_IFACE_ITER_RESUME_ALL,
129 wlcore_started_vifs_iter, &count);
130 return count;
131 }
132
133 static int
134 wlcore_scan_get_channels(struct wl1271 *wl,
135 struct ieee80211_channel *req_channels[],
136 u32 n_channels,
137 u32 n_ssids,
138 struct conn_scan_ch_params *channels,
139 u32 band, bool radar, bool passive,
140 int start, int max_channels,
141 u8 *n_pactive_ch,
142 int scan_type)
143 {
144 int i, j;
145 u32 flags;
146 bool force_passive = !n_ssids;
147 u32 min_dwell_time_active, max_dwell_time_active;
148 u32 dwell_time_passive, dwell_time_dfs;
149
150 /* configure dwell times according to scan type */
151 if (scan_type == SCAN_TYPE_SEARCH) {
152 struct conf_scan_settings *c = &wl->conf.scan;
153 bool active_vif_exists = !!wlcore_count_started_vifs(wl);
154
155 min_dwell_time_active = active_vif_exists ?
156 c->min_dwell_time_active :
157 c->min_dwell_time_active_long;
158 max_dwell_time_active = active_vif_exists ?
159 c->max_dwell_time_active :
160 c->max_dwell_time_active_long;
161 dwell_time_passive = c->dwell_time_passive;
162 dwell_time_dfs = c->dwell_time_dfs;
163 } else {
164 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
165 u32 delta_per_probe;
166
167 if (band == IEEE80211_BAND_5GHZ)
168 delta_per_probe = c->dwell_time_delta_per_probe_5;
169 else
170 delta_per_probe = c->dwell_time_delta_per_probe;
171
172 min_dwell_time_active = c->base_dwell_time +
173 n_ssids * c->num_probe_reqs * delta_per_probe;
174
175 max_dwell_time_active = min_dwell_time_active +
176 c->max_dwell_time_delta;
177 dwell_time_passive = c->dwell_time_passive;
178 dwell_time_dfs = c->dwell_time_dfs;
179 }
180 min_dwell_time_active = DIV_ROUND_UP(min_dwell_time_active, 1000);
181 max_dwell_time_active = DIV_ROUND_UP(max_dwell_time_active, 1000);
182 dwell_time_passive = DIV_ROUND_UP(dwell_time_passive, 1000);
183 dwell_time_dfs = DIV_ROUND_UP(dwell_time_dfs, 1000);
184
185 for (i = 0, j = start;
186 i < n_channels && j < max_channels;
187 i++) {
188 flags = req_channels[i]->flags;
189
190 if (force_passive)
191 flags |= IEEE80211_CHAN_NO_IR;
192
193 if ((req_channels[i]->band == band) &&
194 !(flags & IEEE80211_CHAN_DISABLED) &&
195 (!!(flags & IEEE80211_CHAN_RADAR) == radar) &&
196 /* if radar is set, we ignore the passive flag */
197 (radar ||
198 !!(flags & IEEE80211_CHAN_NO_IR) == passive)) {
199 if (flags & IEEE80211_CHAN_RADAR) {
200 channels[j].flags |= SCAN_CHANNEL_FLAGS_DFS;
201
202 channels[j].passive_duration =
203 cpu_to_le16(dwell_time_dfs);
204 } else {
205 channels[j].passive_duration =
206 cpu_to_le16(dwell_time_passive);
207 }
208
209 channels[j].min_duration =
210 cpu_to_le16(min_dwell_time_active);
211 channels[j].max_duration =
212 cpu_to_le16(max_dwell_time_active);
213
214 channels[j].tx_power_att = req_channels[i]->max_power;
215 channels[j].channel = req_channels[i]->hw_value;
216
217 if (n_pactive_ch &&
218 (band == IEEE80211_BAND_2GHZ) &&
219 (channels[j].channel >= 12) &&
220 (channels[j].channel <= 14) &&
221 (flags & IEEE80211_CHAN_NO_IR) &&
222 !force_passive) {
223 /* pactive channels treated as DFS */
224 channels[j].flags = SCAN_CHANNEL_FLAGS_DFS;
225
226 /*
227 * n_pactive_ch is counted down from the end of
228 * the passive channel list
229 */
230 (*n_pactive_ch)++;
231 wl1271_debug(DEBUG_SCAN, "n_pactive_ch = %d",
232 *n_pactive_ch);
233 }
234
235 wl1271_debug(DEBUG_SCAN, "freq %d, ch. %d, flags 0x%x, power %d, min/max_dwell %d/%d%s%s",
236 req_channels[i]->center_freq,
237 req_channels[i]->hw_value,
238 req_channels[i]->flags,
239 req_channels[i]->max_power,
240 min_dwell_time_active,
241 max_dwell_time_active,
242 flags & IEEE80211_CHAN_RADAR ?
243 ", DFS" : "",
244 flags & IEEE80211_CHAN_NO_IR ?
245 ", NO-IR" : "");
246 j++;
247 }
248 }
249
250 return j - start;
251 }
252
253 bool
254 wlcore_set_scan_chan_params(struct wl1271 *wl,
255 struct wlcore_scan_channels *cfg,
256 struct ieee80211_channel *channels[],
257 u32 n_channels,
258 u32 n_ssids,
259 int scan_type)
260 {
261 u8 n_pactive_ch = 0;
262
263 cfg->passive[0] =
264 wlcore_scan_get_channels(wl,
265 channels,
266 n_channels,
267 n_ssids,
268 cfg->channels_2,
269 IEEE80211_BAND_2GHZ,
270 false, true, 0,
271 MAX_CHANNELS_2GHZ,
272 &n_pactive_ch,
273 scan_type);
274 cfg->active[0] =
275 wlcore_scan_get_channels(wl,
276 channels,
277 n_channels,
278 n_ssids,
279 cfg->channels_2,
280 IEEE80211_BAND_2GHZ,
281 false, false,
282 cfg->passive[0],
283 MAX_CHANNELS_2GHZ,
284 &n_pactive_ch,
285 scan_type);
286 cfg->passive[1] =
287 wlcore_scan_get_channels(wl,
288 channels,
289 n_channels,
290 n_ssids,
291 cfg->channels_5,
292 IEEE80211_BAND_5GHZ,
293 false, true, 0,
294 wl->max_channels_5,
295 &n_pactive_ch,
296 scan_type);
297 cfg->dfs =
298 wlcore_scan_get_channels(wl,
299 channels,
300 n_channels,
301 n_ssids,
302 cfg->channels_5,
303 IEEE80211_BAND_5GHZ,
304 true, true,
305 cfg->passive[1],
306 wl->max_channels_5,
307 &n_pactive_ch,
308 scan_type);
309 cfg->active[1] =
310 wlcore_scan_get_channels(wl,
311 channels,
312 n_channels,
313 n_ssids,
314 cfg->channels_5,
315 IEEE80211_BAND_5GHZ,
316 false, false,
317 cfg->passive[1] + cfg->dfs,
318 wl->max_channels_5,
319 &n_pactive_ch,
320 scan_type);
321
322 /* 802.11j channels are not supported yet */
323 cfg->passive[2] = 0;
324 cfg->active[2] = 0;
325
326 cfg->passive_active = n_pactive_ch;
327
328 wl1271_debug(DEBUG_SCAN, " 2.4GHz: active %d passive %d",
329 cfg->active[0], cfg->passive[0]);
330 wl1271_debug(DEBUG_SCAN, " 5GHz: active %d passive %d",
331 cfg->active[1], cfg->passive[1]);
332 wl1271_debug(DEBUG_SCAN, " DFS: %d", cfg->dfs);
333
334 return cfg->passive[0] || cfg->active[0] ||
335 cfg->passive[1] || cfg->active[1] || cfg->dfs ||
336 cfg->passive[2] || cfg->active[2];
337 }
338 EXPORT_SYMBOL_GPL(wlcore_set_scan_chan_params);
339
340 int wlcore_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
341 const u8 *ssid, size_t ssid_len,
342 struct cfg80211_scan_request *req)
343 {
344 struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
345
346 /*
347 * cfg80211 should guarantee that we don't get more channels
348 * than what we have registered.
349 */
350 BUG_ON(req->n_channels > WL1271_MAX_CHANNELS);
351
352 if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
353 return -EBUSY;
354
355 wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
356
357 if (ssid_len && ssid) {
358 wl->scan.ssid_len = ssid_len;
359 memcpy(wl->scan.ssid, ssid, ssid_len);
360 } else {
361 wl->scan.ssid_len = 0;
362 }
363
364 wl->scan_wlvif = wlvif;
365 wl->scan.req = req;
366 memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
367
368 /* we assume failure so that timeout scenarios are handled correctly */
369 wl->scan.failed = true;
370 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
371 msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
372
373 wl->ops->scan_start(wl, wlvif, req);
374
375 return 0;
376 }
377 /* Returns the scan type to be used or a negative value on error */
378 int
379 wlcore_scan_sched_scan_ssid_list(struct wl1271 *wl,
380 struct wl12xx_vif *wlvif,
381 struct cfg80211_sched_scan_request *req)
382 {
383 struct wl1271_cmd_sched_scan_ssid_list *cmd = NULL;
384 struct cfg80211_match_set *sets = req->match_sets;
385 struct cfg80211_ssid *ssids = req->ssids;
386 int ret = 0, type, i, j, n_match_ssids = 0;
387
388 wl1271_debug((DEBUG_CMD | DEBUG_SCAN), "cmd sched scan ssid list");
389
390 /* count the match sets that contain SSIDs */
391 for (i = 0; i < req->n_match_sets; i++)
392 if (sets[i].ssid.ssid_len > 0)
393 n_match_ssids++;
394
395 /* No filter, no ssids or only bcast ssid */
396 if (!n_match_ssids &&
397 (!req->n_ssids ||
398 (req->n_ssids == 1 && req->ssids[0].ssid_len == 0))) {
399 type = SCAN_SSID_FILTER_ANY;
400 goto out;
401 }
402
403 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
404 if (!cmd) {
405 ret = -ENOMEM;
406 goto out;
407 }
408
409 cmd->role_id = wlvif->role_id;
410 if (!n_match_ssids) {
411 /* No filter, with ssids */
412 type = SCAN_SSID_FILTER_DISABLED;
413
414 for (i = 0; i < req->n_ssids; i++) {
415 cmd->ssids[cmd->n_ssids].type = (ssids[i].ssid_len) ?
416 SCAN_SSID_TYPE_HIDDEN : SCAN_SSID_TYPE_PUBLIC;
417 cmd->ssids[cmd->n_ssids].len = ssids[i].ssid_len;
418 memcpy(cmd->ssids[cmd->n_ssids].ssid, ssids[i].ssid,
419 ssids[i].ssid_len);
420 cmd->n_ssids++;
421 }
422 } else {
423 type = SCAN_SSID_FILTER_LIST;
424
425 /* Add all SSIDs from the filters */
426 for (i = 0; i < req->n_match_sets; i++) {
427 /* ignore sets without SSIDs */
428 if (!sets[i].ssid.ssid_len)
429 continue;
430
431 cmd->ssids[cmd->n_ssids].type = SCAN_SSID_TYPE_PUBLIC;
432 cmd->ssids[cmd->n_ssids].len = sets[i].ssid.ssid_len;
433 memcpy(cmd->ssids[cmd->n_ssids].ssid,
434 sets[i].ssid.ssid, sets[i].ssid.ssid_len);
435 cmd->n_ssids++;
436 }
437 if ((req->n_ssids > 1) ||
438 (req->n_ssids == 1 && req->ssids[0].ssid_len > 0)) {
439 /*
440 * Mark all the SSIDs passed in the SSID list as HIDDEN,
441 * so they're used in probe requests.
442 */
443 for (i = 0; i < req->n_ssids; i++) {
444 if (!req->ssids[i].ssid_len)
445 continue;
446
447 for (j = 0; j < cmd->n_ssids; j++)
448 if ((req->ssids[i].ssid_len ==
449 cmd->ssids[j].len) &&
450 !memcmp(req->ssids[i].ssid,
451 cmd->ssids[j].ssid,
452 req->ssids[i].ssid_len)) {
453 cmd->ssids[j].type =
454 SCAN_SSID_TYPE_HIDDEN;
455 break;
456 }
457 /* Fail if SSID isn't present in the filters */
458 if (j == cmd->n_ssids) {
459 ret = -EINVAL;
460 goto out_free;
461 }
462 }
463 }
464 }
465
466 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_SSID_CFG, cmd,
467 sizeof(*cmd), 0);
468 if (ret < 0) {
469 wl1271_error("cmd sched scan ssid list failed");
470 goto out_free;
471 }
472
473 out_free:
474 kfree(cmd);
475 out:
476 if (ret < 0)
477 return ret;
478 return type;
479 }
480 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_ssid_list);
481
482 void wlcore_scan_sched_scan_results(struct wl1271 *wl)
483 {
484 wl1271_debug(DEBUG_SCAN, "got periodic scan results");
485
486 ieee80211_sched_scan_results(wl->hw);
487 }
488 EXPORT_SYMBOL_GPL(wlcore_scan_sched_scan_results);
Linux with added FPC-III support