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8#include <linux/ieee80211.h>
9#include "scan.h"
10#include "../wlcore/debug.h"
11#include "../wlcore/tx.h"
12
13static int wl1271_get_scan_channels(struct wl1271 *wl,
14 struct cfg80211_scan_request *req,
15 struct basic_scan_channel_params *channels,
16 enum nl80211_band band, bool passive)
17{
18 struct conf_scan_settings *c = &wl->conf.scan;
19 int i, j;
20 u32 flags;
21
22 for (i = 0, j = 0;
23 i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
24 i++) {
25 flags = req->channels[i]->flags;
26
27 if (!test_bit(i, wl->scan.scanned_ch) &&
28 !(flags & IEEE80211_CHAN_DISABLED) &&
29 (req->channels[i]->band == band) &&
30
31
32
33
34
35
36 (passive || !(flags & IEEE80211_CHAN_NO_IR))) {
37 wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
38 req->channels[i]->band,
39 req->channels[i]->center_freq);
40 wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
41 req->channels[i]->hw_value,
42 req->channels[i]->flags);
43 wl1271_debug(DEBUG_SCAN,
44 "max_antenna_gain %d, max_power %d",
45 req->channels[i]->max_antenna_gain,
46 req->channels[i]->max_power);
47 wl1271_debug(DEBUG_SCAN, "beacon_found %d",
48 req->channels[i]->beacon_found);
49
50 if (!passive) {
51 channels[j].min_duration =
52 cpu_to_le32(c->min_dwell_time_active);
53 channels[j].max_duration =
54 cpu_to_le32(c->max_dwell_time_active);
55 } else {
56 channels[j].min_duration =
57 cpu_to_le32(c->dwell_time_passive);
58 channels[j].max_duration =
59 cpu_to_le32(c->dwell_time_passive);
60 }
61 channels[j].early_termination = 0;
62 channels[j].tx_power_att = req->channels[i]->max_power;
63 channels[j].channel = req->channels[i]->hw_value;
64
65 memset(&channels[j].bssid_lsb, 0xff, 4);
66 memset(&channels[j].bssid_msb, 0xff, 2);
67
68
69 set_bit(i, wl->scan.scanned_ch);
70
71 j++;
72 }
73 }
74
75 return j;
76}
77
78#define WL1271_NOTHING_TO_SCAN 1
79
80static int wl1271_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
81 enum nl80211_band band,
82 bool passive, u32 basic_rate)
83{
84 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
85 struct wl1271_cmd_scan *cmd;
86 struct wl1271_cmd_trigger_scan_to *trigger;
87 int ret;
88 u16 scan_options = 0;
89
90
91 if (!passive && wl->scan.req->n_ssids == 0)
92 return WL1271_NOTHING_TO_SCAN;
93
94 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
95 trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
96 if (!cmd || !trigger) {
97 ret = -ENOMEM;
98 goto out;
99 }
100
101 if (wl->conf.scan.split_scan_timeout)
102 scan_options |= WL1271_SCAN_OPT_SPLIT_SCAN;
103
104 if (passive)
105 scan_options |= WL1271_SCAN_OPT_PASSIVE;
106
107
108 if (wlcore_is_p2p_mgmt(wlvif))
109 cmd->params.role_id = wlvif->dev_role_id;
110 else
111 cmd->params.role_id = wlvif->role_id;
112
113 if (WARN_ON(cmd->params.role_id == WL12XX_INVALID_ROLE_ID)) {
114 ret = -EINVAL;
115 goto out;
116 }
117
118 cmd->params.scan_options = cpu_to_le16(scan_options);
119
120 cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
121 cmd->channels,
122 band, passive);
123 if (cmd->params.n_ch == 0) {
124 ret = WL1271_NOTHING_TO_SCAN;
125 goto out;
126 }
127
128 cmd->params.tx_rate = cpu_to_le32(basic_rate);
129 cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
130 cmd->params.tid_trigger = CONF_TX_AC_ANY_TID;
131 cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
132
133 if (band == NL80211_BAND_2GHZ)
134 cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
135 else
136 cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
137
138 if (wl->scan.ssid_len) {
139 cmd->params.ssid_len = wl->scan.ssid_len;
140 memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
141 }
142
143 memcpy(cmd->addr, vif->addr, ETH_ALEN);
144
145 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
146 cmd->params.role_id, band,
147 wl->scan.ssid, wl->scan.ssid_len,
148 wl->scan.req->ie,
149 wl->scan.req->ie_len, NULL, 0, false);
150 if (ret < 0) {
151 wl1271_error("PROBE request template failed");
152 goto out;
153 }
154
155 trigger->timeout = cpu_to_le32(wl->conf.scan.split_scan_timeout);
156 ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
157 sizeof(*trigger), 0);
158 if (ret < 0) {
159 wl1271_error("trigger scan to failed for hw scan");
160 goto out;
161 }
162
163 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
164
165 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
166 if (ret < 0) {
167 wl1271_error("SCAN failed");
168 goto out;
169 }
170
171out:
172 kfree(cmd);
173 kfree(trigger);
174 return ret;
175}
176
177int wl12xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
178{
179 struct wl1271_cmd_header *cmd = NULL;
180 int ret = 0;
181
182 if (WARN_ON(wl->scan.state == WL1271_SCAN_STATE_IDLE))
183 return -EINVAL;
184
185 wl1271_debug(DEBUG_CMD, "cmd scan stop");
186
187 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
188 if (!cmd) {
189 ret = -ENOMEM;
190 goto out;
191 }
192
193 ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, cmd,
194 sizeof(*cmd), 0);
195 if (ret < 0) {
196 wl1271_error("cmd stop_scan failed");
197 goto out;
198 }
199out:
200 kfree(cmd);
201 return ret;
202}
203
204void wl1271_scan_stm(struct wl1271 *wl, struct wl12xx_vif *wlvif)
205{
206 int ret = 0;
207 enum nl80211_band band;
208 u32 rate, mask;
209
210 switch (wl->scan.state) {
211 case WL1271_SCAN_STATE_IDLE:
212 break;
213
214 case WL1271_SCAN_STATE_2GHZ_ACTIVE:
215 band = NL80211_BAND_2GHZ;
216 mask = wlvif->bitrate_masks[band];
217 if (wl->scan.req->no_cck) {
218 mask &= ~CONF_TX_CCK_RATES;
219 if (!mask)
220 mask = CONF_TX_RATE_MASK_BASIC_P2P;
221 }
222 rate = wl1271_tx_min_rate_get(wl, mask);
223 ret = wl1271_scan_send(wl, wlvif, band, false, rate);
224 if (ret == WL1271_NOTHING_TO_SCAN) {
225 wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
226 wl1271_scan_stm(wl, wlvif);
227 }
228
229 break;
230
231 case WL1271_SCAN_STATE_2GHZ_PASSIVE:
232 band = NL80211_BAND_2GHZ;
233 mask = wlvif->bitrate_masks[band];
234 if (wl->scan.req->no_cck) {
235 mask &= ~CONF_TX_CCK_RATES;
236 if (!mask)
237 mask = CONF_TX_RATE_MASK_BASIC_P2P;
238 }
239 rate = wl1271_tx_min_rate_get(wl, mask);
240 ret = wl1271_scan_send(wl, wlvif, band, true, rate);
241 if (ret == WL1271_NOTHING_TO_SCAN) {
242 if (wl->enable_11a)
243 wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
244 else
245 wl->scan.state = WL1271_SCAN_STATE_DONE;
246 wl1271_scan_stm(wl, wlvif);
247 }
248
249 break;
250
251 case WL1271_SCAN_STATE_5GHZ_ACTIVE:
252 band = NL80211_BAND_5GHZ;
253 rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
254 ret = wl1271_scan_send(wl, wlvif, band, false, rate);
255 if (ret == WL1271_NOTHING_TO_SCAN) {
256 wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
257 wl1271_scan_stm(wl, wlvif);
258 }
259
260 break;
261
262 case WL1271_SCAN_STATE_5GHZ_PASSIVE:
263 band = NL80211_BAND_5GHZ;
264 rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
265 ret = wl1271_scan_send(wl, wlvif, band, true, rate);
266 if (ret == WL1271_NOTHING_TO_SCAN) {
267 wl->scan.state = WL1271_SCAN_STATE_DONE;
268 wl1271_scan_stm(wl, wlvif);
269 }
270
271 break;
272
273 case WL1271_SCAN_STATE_DONE:
274 wl->scan.failed = false;
275 cancel_delayed_work(&wl->scan_complete_work);
276 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
277 msecs_to_jiffies(0));
278 break;
279
280 default:
281 wl1271_error("invalid scan state");
282 break;
283 }
284
285 if (ret < 0) {
286 cancel_delayed_work(&wl->scan_complete_work);
287 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
288 msecs_to_jiffies(0));
289 }
290}
291
292static void wl12xx_adjust_channels(struct wl1271_cmd_sched_scan_config *cmd,
293 struct wlcore_scan_channels *cmd_channels)
294{
295 memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
296 memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
297 cmd->dfs = cmd_channels->dfs;
298 cmd->n_pactive_ch = cmd_channels->passive_active;
299
300 memcpy(cmd->channels_2, cmd_channels->channels_2,
301 sizeof(cmd->channels_2));
302 memcpy(cmd->channels_5, cmd_channels->channels_5,
303 sizeof(cmd->channels_5));
304
305}
306
307int wl1271_scan_sched_scan_config(struct wl1271 *wl,
308 struct wl12xx_vif *wlvif,
309 struct cfg80211_sched_scan_request *req,
310 struct ieee80211_scan_ies *ies)
311{
312 struct wl1271_cmd_sched_scan_config *cfg = NULL;
313 struct wlcore_scan_channels *cfg_channels = NULL;
314 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
315 int i, ret;
316 bool force_passive = !req->n_ssids;
317
318 wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
319
320 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
321 if (!cfg)
322 return -ENOMEM;
323
324 cfg->role_id = wlvif->role_id;
325 cfg->rssi_threshold = c->rssi_threshold;
326 cfg->snr_threshold = c->snr_threshold;
327 cfg->n_probe_reqs = c->num_probe_reqs;
328
329 cfg->cycles = 0;
330
331 cfg->report_after = 1;
332
333 cfg->terminate = 0;
334 cfg->tag = WL1271_SCAN_DEFAULT_TAG;
335
336 cfg->bss_type = SCAN_BSS_TYPE_ANY;
337
338 for (i = 0; i < SCAN_MAX_CYCLE_INTERVALS; i++)
339 cfg->intervals[i] = cpu_to_le32(req->scan_plans[0].interval *
340 MSEC_PER_SEC);
341
342 cfg->ssid_len = 0;
343 ret = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
344 if (ret < 0)
345 goto out;
346
347 cfg->filter_type = ret;
348
349 wl1271_debug(DEBUG_SCAN, "filter_type = %d", cfg->filter_type);
350
351 cfg_channels = kzalloc(sizeof(*cfg_channels), GFP_KERNEL);
352 if (!cfg_channels) {
353 ret = -ENOMEM;
354 goto out;
355 }
356
357 if (!wlcore_set_scan_chan_params(wl, cfg_channels, req->channels,
358 req->n_channels, req->n_ssids,
359 SCAN_TYPE_PERIODIC)) {
360 wl1271_error("scan channel list is empty");
361 ret = -EINVAL;
362 goto out;
363 }
364 wl12xx_adjust_channels(cfg, cfg_channels);
365
366 if (!force_passive && cfg->active[0]) {
367 u8 band = NL80211_BAND_2GHZ;
368 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
369 wlvif->role_id, band,
370 req->ssids[0].ssid,
371 req->ssids[0].ssid_len,
372 ies->ies[band],
373 ies->len[band],
374 ies->common_ies,
375 ies->common_ie_len,
376 true);
377 if (ret < 0) {
378 wl1271_error("2.4GHz PROBE request template failed");
379 goto out;
380 }
381 }
382
383 if (!force_passive && cfg->active[1]) {
384 u8 band = NL80211_BAND_5GHZ;
385 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
386 wlvif->role_id, band,
387 req->ssids[0].ssid,
388 req->ssids[0].ssid_len,
389 ies->ies[band],
390 ies->len[band],
391 ies->common_ies,
392 ies->common_ie_len,
393 true);
394 if (ret < 0) {
395 wl1271_error("5GHz PROBE request template failed");
396 goto out;
397 }
398 }
399
400 wl1271_dump(DEBUG_SCAN, "SCAN_CFG: ", cfg, sizeof(*cfg));
401
402 ret = wl1271_cmd_send(wl, CMD_CONNECTION_SCAN_CFG, cfg,
403 sizeof(*cfg), 0);
404 if (ret < 0) {
405 wl1271_error("SCAN configuration failed");
406 goto out;
407 }
408out:
409 kfree(cfg_channels);
410 kfree(cfg);
411 return ret;
412}
413
414int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif)
415{
416 struct wl1271_cmd_sched_scan_start *start;
417 int ret = 0;
418
419 wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
420
421 if (wlvif->bss_type != BSS_TYPE_STA_BSS)
422 return -EOPNOTSUPP;
423
424 if ((wl->quirks & WLCORE_QUIRK_NO_SCHED_SCAN_WHILE_CONN) &&
425 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
426 return -EBUSY;
427
428 start = kzalloc(sizeof(*start), GFP_KERNEL);
429 if (!start)
430 return -ENOMEM;
431
432 start->role_id = wlvif->role_id;
433 start->tag = WL1271_SCAN_DEFAULT_TAG;
434
435 ret = wl1271_cmd_send(wl, CMD_START_PERIODIC_SCAN, start,
436 sizeof(*start), 0);
437 if (ret < 0) {
438 wl1271_error("failed to send scan start command");
439 goto out_free;
440 }
441
442out_free:
443 kfree(start);
444 return ret;
445}
446
447int wl12xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
448 struct cfg80211_sched_scan_request *req,
449 struct ieee80211_scan_ies *ies)
450{
451 int ret;
452
453 ret = wl1271_scan_sched_scan_config(wl, wlvif, req, ies);
454 if (ret < 0)
455 return ret;
456
457 return wl1271_scan_sched_scan_start(wl, wlvif);
458}
459
460void wl12xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
461{
462 struct wl1271_cmd_sched_scan_stop *stop;
463 int ret = 0;
464
465 wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
466
467
468 stop = kzalloc(sizeof(*stop), GFP_KERNEL);
469 if (!stop) {
470 wl1271_error("failed to alloc memory to send sched scan stop");
471 return;
472 }
473
474 stop->role_id = wlvif->role_id;
475 stop->tag = WL1271_SCAN_DEFAULT_TAG;
476
477 ret = wl1271_cmd_send(wl, CMD_STOP_PERIODIC_SCAN, stop,
478 sizeof(*stop), 0);
479 if (ret < 0) {
480 wl1271_error("failed to send sched scan stop command");
481 goto out_free;
482 }
483
484out_free:
485 kfree(stop);
486}
487
488int wl12xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
489 struct cfg80211_scan_request *req)
490{
491 wl1271_scan_stm(wl, wlvif);
492 return 0;
493}
494
495void wl12xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
496{
497 wl1271_scan_stm(wl, wlvif);
498}
499
