1 /*
2 * This file is part of wl18xx
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
wl18xx_adjust_channels(struct wl18xx_cmd_scan_params * cmd,struct wlcore_scan_channels * cmd_channels)26 static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *cmd,
27 struct wlcore_scan_channels *cmd_channels)
28 {
29 memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
30 memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
31 cmd->dfs = cmd_channels->dfs;
32 cmd->passive_active = cmd_channels->passive_active;
33
34 memcpy(cmd->channels_2, cmd_channels->channels_2,
35 sizeof(cmd->channels_2));
36 memcpy(cmd->channels_5, cmd_channels->channels_5,
37 sizeof(cmd->channels_5));
38 /* channels_4 are not supported, so no need to copy them */
39 }
40
wl18xx_scan_send(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_scan_request * req)41 static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
42 struct cfg80211_scan_request *req)
43 {
44 struct wl18xx_cmd_scan_params *cmd;
45 struct wlcore_scan_channels *cmd_channels = NULL;
46 int ret;
47
48 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
49 if (!cmd) {
50 ret = -ENOMEM;
51 goto out;
52 }
53
54 /* scan on the dev role if the regular one is not started */
55 if (wlcore_is_p2p_mgmt(wlvif))
56 cmd->role_id = wlvif->dev_role_id;
57 else
58 cmd->role_id = wlvif->role_id;
59
60 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
61 ret = -EINVAL;
62 goto out;
63 }
64
65 cmd->scan_type = SCAN_TYPE_SEARCH;
66 cmd->rssi_threshold = -127;
67 cmd->snr_threshold = 0;
68
69 cmd->bss_type = SCAN_BSS_TYPE_ANY;
70
71 cmd->ssid_from_list = 0;
72 cmd->filter = 0;
73 cmd->add_broadcast = 0;
74
75 cmd->urgency = 0;
76 cmd->protect = 0;
77
78 cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
79 cmd->terminate_after = 0;
80
81 /* configure channels */
82 WARN_ON(req->n_ssids > 1);
83
84 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
85 if (!cmd_channels) {
86 ret = -ENOMEM;
87 goto out;
88 }
89
90 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
91 req->n_channels, req->n_ssids,
92 SCAN_TYPE_SEARCH);
93 wl18xx_adjust_channels(cmd, cmd_channels);
94
95 /*
96 * all the cycles params (except total cycles) should
97 * remain 0 for normal scan
98 */
99 cmd->total_cycles = 1;
100
101 if (req->no_cck)
102 cmd->rate = WL18XX_SCAN_RATE_6;
103
104 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
105
106 if (req->n_ssids) {
107 cmd->ssid_len = req->ssids[0].ssid_len;
108 memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
109 }
110
111 /* TODO: per-band ies? */
112 if (cmd->active[0]) {
113 u8 band = NL80211_BAND_2GHZ;
114 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
115 cmd->role_id, band,
116 req->ssids ? req->ssids[0].ssid : NULL,
117 req->ssids ? req->ssids[0].ssid_len : 0,
118 req->ie,
119 req->ie_len,
120 NULL,
121 0,
122 false);
123 if (ret < 0) {
124 wl1271_error("2.4GHz PROBE request template failed");
125 goto out;
126 }
127 }
128
129 if (cmd->active[1] || cmd->dfs) {
130 u8 band = NL80211_BAND_5GHZ;
131 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
132 cmd->role_id, band,
133 req->ssids ? req->ssids[0].ssid : NULL,
134 req->ssids ? req->ssids[0].ssid_len : 0,
135 req->ie,
136 req->ie_len,
137 NULL,
138 0,
139 false);
140 if (ret < 0) {
141 wl1271_error("5GHz PROBE request template failed");
142 goto out;
143 }
144 }
145
146 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
147
148 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
149 if (ret < 0) {
150 wl1271_error("SCAN failed");
151 goto out;
152 }
153
154 out:
155 kfree(cmd_channels);
156 kfree(cmd);
157 return ret;
158 }
159
wl18xx_scan_completed(struct wl1271 * wl,struct wl12xx_vif * wlvif)160 void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
161 {
162 wl->scan.failed = false;
163 cancel_delayed_work(&wl->scan_complete_work);
164 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
165 msecs_to_jiffies(0));
166 }
167
168 static
wl18xx_scan_sched_scan_config(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)169 int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
170 struct wl12xx_vif *wlvif,
171 struct cfg80211_sched_scan_request *req,
172 struct ieee80211_scan_ies *ies)
173 {
174 struct wl18xx_cmd_scan_params *cmd;
175 struct wlcore_scan_channels *cmd_channels = NULL;
176 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
177 int ret;
178 int filter_type;
179
180 wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
181
182 filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
183 if (filter_type < 0)
184 return filter_type;
185
186 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
187 if (!cmd) {
188 ret = -ENOMEM;
189 goto out;
190 }
191
192 cmd->role_id = wlvif->role_id;
193
194 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
195 ret = -EINVAL;
196 goto out;
197 }
198
199 cmd->scan_type = SCAN_TYPE_PERIODIC;
200 cmd->rssi_threshold = c->rssi_threshold;
201 cmd->snr_threshold = c->snr_threshold;
202
203 /* don't filter on BSS type */
204 cmd->bss_type = SCAN_BSS_TYPE_ANY;
205
206 cmd->ssid_from_list = 1;
207 if (filter_type == SCAN_SSID_FILTER_LIST)
208 cmd->filter = 1;
209 cmd->add_broadcast = 0;
210
211 cmd->urgency = 0;
212 cmd->protect = 0;
213
214 cmd->n_probe_reqs = c->num_probe_reqs;
215 /* don't stop scanning automatically when something is found */
216 cmd->terminate_after = 0;
217
218 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
219 if (!cmd_channels) {
220 ret = -ENOMEM;
221 goto out;
222 }
223
224 /* configure channels */
225 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
226 req->n_channels, req->n_ssids,
227 SCAN_TYPE_PERIODIC);
228 wl18xx_adjust_channels(cmd, cmd_channels);
229
230 if (c->num_short_intervals && c->long_interval &&
231 c->long_interval > req->scan_plans[0].interval * MSEC_PER_SEC) {
232 cmd->short_cycles_msec =
233 cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
234 cmd->long_cycles_msec = cpu_to_le16(c->long_interval);
235 cmd->short_cycles_count = c->num_short_intervals;
236 } else {
237 cmd->short_cycles_msec = 0;
238 cmd->long_cycles_msec =
239 cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
240 cmd->short_cycles_count = 0;
241 }
242 wl1271_debug(DEBUG_SCAN, "short_interval: %d, long_interval: %d, num_short: %d",
243 le16_to_cpu(cmd->short_cycles_msec),
244 le16_to_cpu(cmd->long_cycles_msec),
245 cmd->short_cycles_count);
246
247 cmd->total_cycles = 0;
248
249 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
250
251 /* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
252 cmd->report_threshold = 1;
253 cmd->terminate_on_report = 0;
254
255 if (cmd->active[0]) {
256 u8 band = NL80211_BAND_2GHZ;
257 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
258 cmd->role_id, band,
259 req->ssids ? req->ssids[0].ssid : NULL,
260 req->ssids ? req->ssids[0].ssid_len : 0,
261 ies->ies[band],
262 ies->len[band],
263 ies->common_ies,
264 ies->common_ie_len,
265 true);
266 if (ret < 0) {
267 wl1271_error("2.4GHz PROBE request template failed");
268 goto out;
269 }
270 }
271
272 if (cmd->active[1] || cmd->dfs) {
273 u8 band = NL80211_BAND_5GHZ;
274 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
275 cmd->role_id, band,
276 req->ssids ? req->ssids[0].ssid : NULL,
277 req->ssids ? req->ssids[0].ssid_len : 0,
278 ies->ies[band],
279 ies->len[band],
280 ies->common_ies,
281 ies->common_ie_len,
282 true);
283 if (ret < 0) {
284 wl1271_error("5GHz PROBE request template failed");
285 goto out;
286 }
287 }
288
289 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
290
291 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
292 if (ret < 0) {
293 wl1271_error("SCAN failed");
294 goto out;
295 }
296
297 out:
298 kfree(cmd_channels);
299 kfree(cmd);
300 return ret;
301 }
302
wl18xx_sched_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)303 int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
304 struct cfg80211_sched_scan_request *req,
305 struct ieee80211_scan_ies *ies)
306 {
307 return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
308 }
309
__wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif,u8 scan_type)310 static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
311 u8 scan_type)
312 {
313 struct wl18xx_cmd_scan_stop *stop;
314 int ret;
315
316 wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
317
318 stop = kzalloc(sizeof(*stop), GFP_KERNEL);
319 if (!stop) {
320 wl1271_error("failed to alloc memory to send sched scan stop");
321 return -ENOMEM;
322 }
323
324 stop->role_id = wlvif->role_id;
325 stop->scan_type = scan_type;
326
327 ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
328 if (ret < 0) {
329 wl1271_error("failed to send sched scan stop command");
330 goto out_free;
331 }
332
333 out_free:
334 kfree(stop);
335 return ret;
336 }
337
wl18xx_scan_sched_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)338 void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
339 {
340 __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
341 }
wl18xx_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_scan_request * req)342 int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
343 struct cfg80211_scan_request *req)
344 {
345 return wl18xx_scan_send(wl, wlvif, req);
346 }
347
wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)348 int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
349 {
350 return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
351 }
352