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 cmd->role_id = wlvif->role_id;
55
56 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
57 ret = -EINVAL;
58 goto out;
59 }
60
61 cmd->scan_type = SCAN_TYPE_SEARCH;
62 cmd->rssi_threshold = -127;
63 cmd->snr_threshold = 0;
64
65 cmd->bss_type = SCAN_BSS_TYPE_ANY;
66
67 cmd->ssid_from_list = 0;
68 cmd->filter = 0;
69 cmd->add_broadcast = 0;
70
71 cmd->urgency = 0;
72 cmd->protect = 0;
73
74 cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
75 cmd->terminate_after = 0;
76
77 /* configure channels */
78 WARN_ON(req->n_ssids > 1);
79
80 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
81 if (!cmd_channels) {
82 ret = -ENOMEM;
83 goto out;
84 }
85
86 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
87 req->n_channels, req->n_ssids,
88 SCAN_TYPE_SEARCH);
89 wl18xx_adjust_channels(cmd, cmd_channels);
90
91 /*
92 * all the cycles params (except total cycles) should
93 * remain 0 for normal scan
94 */
95 cmd->total_cycles = 1;
96
97 if (req->no_cck)
98 cmd->rate = WL18XX_SCAN_RATE_6;
99
100 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
101
102 if (req->n_ssids) {
103 cmd->ssid_len = req->ssids[0].ssid_len;
104 memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
105 }
106
107 /* TODO: per-band ies? */
108 if (cmd->active[0]) {
109 u8 band = IEEE80211_BAND_2GHZ;
110 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
111 cmd->role_id, band,
112 req->ssids ? req->ssids[0].ssid : NULL,
113 req->ssids ? req->ssids[0].ssid_len : 0,
114 req->ie,
115 req->ie_len,
116 NULL,
117 0,
118 false);
119 if (ret < 0) {
120 wl1271_error("2.4GHz PROBE request template failed");
121 goto out;
122 }
123 }
124
125 if (cmd->active[1] || cmd->dfs) {
126 u8 band = IEEE80211_BAND_5GHZ;
127 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
128 cmd->role_id, band,
129 req->ssids ? req->ssids[0].ssid : NULL,
130 req->ssids ? req->ssids[0].ssid_len : 0,
131 req->ie,
132 req->ie_len,
133 NULL,
134 0,
135 false);
136 if (ret < 0) {
137 wl1271_error("5GHz PROBE request template failed");
138 goto out;
139 }
140 }
141
142 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
143
144 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
145 if (ret < 0) {
146 wl1271_error("SCAN failed");
147 goto out;
148 }
149
150 out:
151 kfree(cmd_channels);
152 kfree(cmd);
153 return ret;
154 }
155
wl18xx_scan_completed(struct wl1271 * wl,struct wl12xx_vif * wlvif)156 void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
157 {
158 wl->scan.failed = false;
159 cancel_delayed_work(&wl->scan_complete_work);
160 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
161 msecs_to_jiffies(0));
162 }
163
164 static
wl18xx_scan_sched_scan_config(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)165 int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
166 struct wl12xx_vif *wlvif,
167 struct cfg80211_sched_scan_request *req,
168 struct ieee80211_scan_ies *ies)
169 {
170 struct wl18xx_cmd_scan_params *cmd;
171 struct wlcore_scan_channels *cmd_channels = NULL;
172 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
173 int ret;
174 int filter_type;
175
176 wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
177
178 filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
179 if (filter_type < 0)
180 return filter_type;
181
182 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
183 if (!cmd) {
184 ret = -ENOMEM;
185 goto out;
186 }
187
188 cmd->role_id = wlvif->role_id;
189
190 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
191 ret = -EINVAL;
192 goto out;
193 }
194
195 cmd->scan_type = SCAN_TYPE_PERIODIC;
196 cmd->rssi_threshold = c->rssi_threshold;
197 cmd->snr_threshold = c->snr_threshold;
198
199 /* don't filter on BSS type */
200 cmd->bss_type = SCAN_BSS_TYPE_ANY;
201
202 cmd->ssid_from_list = 1;
203 if (filter_type == SCAN_SSID_FILTER_LIST)
204 cmd->filter = 1;
205 cmd->add_broadcast = 0;
206
207 cmd->urgency = 0;
208 cmd->protect = 0;
209
210 cmd->n_probe_reqs = c->num_probe_reqs;
211 /* don't stop scanning automatically when something is found */
212 cmd->terminate_after = 0;
213
214 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
215 if (!cmd_channels) {
216 ret = -ENOMEM;
217 goto out;
218 }
219
220 /* configure channels */
221 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
222 req->n_channels, req->n_ssids,
223 SCAN_TYPE_PERIODIC);
224 wl18xx_adjust_channels(cmd, cmd_channels);
225
226 cmd->short_cycles_sec = 0;
227 cmd->long_cycles_sec = cpu_to_le16(req->interval);
228 cmd->short_cycles_count = 0;
229
230 cmd->total_cycles = 0;
231
232 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
233
234 /* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
235 cmd->report_threshold = 1;
236 cmd->terminate_on_report = 0;
237
238 if (cmd->active[0]) {
239 u8 band = IEEE80211_BAND_2GHZ;
240 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
241 cmd->role_id, band,
242 req->ssids ? req->ssids[0].ssid : NULL,
243 req->ssids ? req->ssids[0].ssid_len : 0,
244 ies->ies[band],
245 ies->len[band],
246 ies->common_ies,
247 ies->common_ie_len,
248 true);
249 if (ret < 0) {
250 wl1271_error("2.4GHz PROBE request template failed");
251 goto out;
252 }
253 }
254
255 if (cmd->active[1] || cmd->dfs) {
256 u8 band = IEEE80211_BAND_5GHZ;
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("5GHz PROBE request template failed");
268 goto out;
269 }
270 }
271
272 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
273
274 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
275 if (ret < 0) {
276 wl1271_error("SCAN failed");
277 goto out;
278 }
279
280 out:
281 kfree(cmd_channels);
282 kfree(cmd);
283 return ret;
284 }
285
wl18xx_sched_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)286 int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
287 struct cfg80211_sched_scan_request *req,
288 struct ieee80211_scan_ies *ies)
289 {
290 return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
291 }
292
__wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif,u8 scan_type)293 static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
294 u8 scan_type)
295 {
296 struct wl18xx_cmd_scan_stop *stop;
297 int ret;
298
299 wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
300
301 stop = kzalloc(sizeof(*stop), GFP_KERNEL);
302 if (!stop) {
303 wl1271_error("failed to alloc memory to send sched scan stop");
304 return -ENOMEM;
305 }
306
307 stop->role_id = wlvif->role_id;
308 stop->scan_type = scan_type;
309
310 ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
311 if (ret < 0) {
312 wl1271_error("failed to send sched scan stop command");
313 goto out_free;
314 }
315
316 out_free:
317 kfree(stop);
318 return ret;
319 }
320
wl18xx_scan_sched_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)321 void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
322 {
323 __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
324 }
wl18xx_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_scan_request * req)325 int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
326 struct cfg80211_scan_request *req)
327 {
328 return wl18xx_scan_send(wl, wlvif, req);
329 }
330
wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)331 int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
332 {
333 return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
334 }
335