1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file is part of wl18xx
4 *
5 * Copyright (C) 2012 Texas Instruments. All rights reserved.
6 */
7
8 #include <linux/ieee80211.h>
9 #include "scan.h"
10 #include "../wlcore/debug.h"
11
wl18xx_adjust_channels(struct wl18xx_cmd_scan_params * cmd,struct wlcore_scan_channels * cmd_channels)12 static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *cmd,
13 struct wlcore_scan_channels *cmd_channels)
14 {
15 memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
16 memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
17 cmd->dfs = cmd_channels->dfs;
18 cmd->passive_active = cmd_channels->passive_active;
19
20 memcpy(cmd->channels_2, cmd_channels->channels_2,
21 sizeof(cmd->channels_2));
22 memcpy(cmd->channels_5, cmd_channels->channels_5,
23 sizeof(cmd->channels_5));
24 /* channels_4 are not supported, so no need to copy them */
25 }
26
wl18xx_scan_send(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_scan_request * req)27 static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
28 struct cfg80211_scan_request *req)
29 {
30 struct wl18xx_cmd_scan_params *cmd;
31 struct wlcore_scan_channels *cmd_channels = NULL;
32 int ret;
33
34 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
35 if (!cmd) {
36 ret = -ENOMEM;
37 goto out;
38 }
39
40 /* scan on the dev role if the regular one is not started */
41 if (wlcore_is_p2p_mgmt(wlvif))
42 cmd->role_id = wlvif->dev_role_id;
43 else
44 cmd->role_id = wlvif->role_id;
45
46 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
47 ret = -EINVAL;
48 goto out;
49 }
50
51 cmd->scan_type = SCAN_TYPE_SEARCH;
52 cmd->rssi_threshold = -127;
53 cmd->snr_threshold = 0;
54
55 cmd->bss_type = SCAN_BSS_TYPE_ANY;
56
57 cmd->ssid_from_list = 0;
58 cmd->filter = 0;
59 cmd->add_broadcast = 0;
60
61 cmd->urgency = 0;
62 cmd->protect = 0;
63
64 cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
65 cmd->terminate_after = 0;
66
67 /* configure channels */
68 WARN_ON(req->n_ssids > 1);
69
70 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
71 if (!cmd_channels) {
72 ret = -ENOMEM;
73 goto out;
74 }
75
76 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
77 req->n_channels, req->n_ssids,
78 SCAN_TYPE_SEARCH);
79 wl18xx_adjust_channels(cmd, cmd_channels);
80
81 /*
82 * all the cycles params (except total cycles) should
83 * remain 0 for normal scan
84 */
85 cmd->total_cycles = 1;
86
87 if (req->no_cck)
88 cmd->rate = WL18XX_SCAN_RATE_6;
89
90 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
91
92 if (req->n_ssids) {
93 cmd->ssid_len = req->ssids[0].ssid_len;
94 memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
95 }
96
97 /* TODO: per-band ies? */
98 if (cmd->active[0]) {
99 u8 band = NL80211_BAND_2GHZ;
100 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
101 cmd->role_id, band,
102 req->ssids ? req->ssids[0].ssid : NULL,
103 req->ssids ? req->ssids[0].ssid_len : 0,
104 req->ie,
105 req->ie_len,
106 NULL,
107 0,
108 false);
109 if (ret < 0) {
110 wl1271_error("2.4GHz PROBE request template failed");
111 goto out;
112 }
113 }
114
115 if (cmd->active[1] || cmd->dfs) {
116 u8 band = NL80211_BAND_5GHZ;
117 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
118 cmd->role_id, band,
119 req->ssids ? req->ssids[0].ssid : NULL,
120 req->ssids ? req->ssids[0].ssid_len : 0,
121 req->ie,
122 req->ie_len,
123 NULL,
124 0,
125 false);
126 if (ret < 0) {
127 wl1271_error("5GHz PROBE request template failed");
128 goto out;
129 }
130 }
131
132 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
133
134 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
135 if (ret < 0) {
136 wl1271_error("SCAN failed");
137 goto out;
138 }
139
140 out:
141 kfree(cmd_channels);
142 kfree(cmd);
143 return ret;
144 }
145
wl18xx_scan_completed(struct wl1271 * wl,struct wl12xx_vif * wlvif)146 void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
147 {
148 wl->scan.failed = false;
149 cancel_delayed_work(&wl->scan_complete_work);
150 ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
151 msecs_to_jiffies(0));
152 }
153
154 static
wl18xx_scan_sched_scan_config(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)155 int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
156 struct wl12xx_vif *wlvif,
157 struct cfg80211_sched_scan_request *req,
158 struct ieee80211_scan_ies *ies)
159 {
160 struct wl18xx_cmd_scan_params *cmd;
161 struct wlcore_scan_channels *cmd_channels = NULL;
162 struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
163 int ret;
164 int filter_type;
165
166 wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
167
168 filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
169 if (filter_type < 0)
170 return filter_type;
171
172 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
173 if (!cmd) {
174 ret = -ENOMEM;
175 goto out;
176 }
177
178 cmd->role_id = wlvif->role_id;
179
180 if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
181 ret = -EINVAL;
182 goto out;
183 }
184
185 cmd->scan_type = SCAN_TYPE_PERIODIC;
186 cmd->rssi_threshold = c->rssi_threshold;
187 cmd->snr_threshold = c->snr_threshold;
188
189 /* don't filter on BSS type */
190 cmd->bss_type = SCAN_BSS_TYPE_ANY;
191
192 cmd->ssid_from_list = 1;
193 if (filter_type == SCAN_SSID_FILTER_LIST)
194 cmd->filter = 1;
195 cmd->add_broadcast = 0;
196
197 cmd->urgency = 0;
198 cmd->protect = 0;
199
200 cmd->n_probe_reqs = c->num_probe_reqs;
201 /* don't stop scanning automatically when something is found */
202 cmd->terminate_after = 0;
203
204 cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
205 if (!cmd_channels) {
206 ret = -ENOMEM;
207 goto out;
208 }
209
210 /* configure channels */
211 wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
212 req->n_channels, req->n_ssids,
213 SCAN_TYPE_PERIODIC);
214 wl18xx_adjust_channels(cmd, cmd_channels);
215
216 if (c->num_short_intervals && c->long_interval &&
217 c->long_interval > req->scan_plans[0].interval * MSEC_PER_SEC) {
218 cmd->short_cycles_msec =
219 cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
220 cmd->long_cycles_msec = cpu_to_le16(c->long_interval);
221 cmd->short_cycles_count = c->num_short_intervals;
222 } else {
223 cmd->short_cycles_msec = 0;
224 cmd->long_cycles_msec =
225 cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
226 cmd->short_cycles_count = 0;
227 }
228 wl1271_debug(DEBUG_SCAN, "short_interval: %d, long_interval: %d, num_short: %d",
229 le16_to_cpu(cmd->short_cycles_msec),
230 le16_to_cpu(cmd->long_cycles_msec),
231 cmd->short_cycles_count);
232
233 cmd->total_cycles = 0;
234
235 cmd->tag = WL1271_SCAN_DEFAULT_TAG;
236
237 /* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
238 cmd->report_threshold = 1;
239 cmd->terminate_on_report = 0;
240
241 if (cmd->active[0]) {
242 u8 band = NL80211_BAND_2GHZ;
243 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
244 cmd->role_id, band,
245 req->ssids ? req->ssids[0].ssid : NULL,
246 req->ssids ? req->ssids[0].ssid_len : 0,
247 ies->ies[band],
248 ies->len[band],
249 ies->common_ies,
250 ies->common_ie_len,
251 true);
252 if (ret < 0) {
253 wl1271_error("2.4GHz PROBE request template failed");
254 goto out;
255 }
256 }
257
258 if (cmd->active[1] || cmd->dfs) {
259 u8 band = NL80211_BAND_5GHZ;
260 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
261 cmd->role_id, band,
262 req->ssids ? req->ssids[0].ssid : NULL,
263 req->ssids ? req->ssids[0].ssid_len : 0,
264 ies->ies[band],
265 ies->len[band],
266 ies->common_ies,
267 ies->common_ie_len,
268 true);
269 if (ret < 0) {
270 wl1271_error("5GHz PROBE request template failed");
271 goto out;
272 }
273 }
274
275 wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
276
277 ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
278 if (ret < 0) {
279 wl1271_error("SCAN failed");
280 goto out;
281 }
282
283 out:
284 kfree(cmd_channels);
285 kfree(cmd);
286 return ret;
287 }
288
wl18xx_sched_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies)289 int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
290 struct cfg80211_sched_scan_request *req,
291 struct ieee80211_scan_ies *ies)
292 {
293 return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
294 }
295
__wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif,u8 scan_type)296 static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
297 u8 scan_type)
298 {
299 struct wl18xx_cmd_scan_stop *stop;
300 int ret;
301
302 wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
303
304 stop = kzalloc(sizeof(*stop), GFP_KERNEL);
305 if (!stop) {
306 wl1271_error("failed to alloc memory to send sched scan stop");
307 return -ENOMEM;
308 }
309
310 stop->role_id = wlvif->role_id;
311 stop->scan_type = scan_type;
312
313 ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
314 if (ret < 0) {
315 wl1271_error("failed to send sched scan stop command");
316 goto out_free;
317 }
318
319 out_free:
320 kfree(stop);
321 return ret;
322 }
323
wl18xx_scan_sched_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)324 void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
325 {
326 __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
327 }
wl18xx_scan_start(struct wl1271 * wl,struct wl12xx_vif * wlvif,struct cfg80211_scan_request * req)328 int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
329 struct cfg80211_scan_request *req)
330 {
331 return wl18xx_scan_send(wl, wlvif, req);
332 }
333
wl18xx_scan_stop(struct wl1271 * wl,struct wl12xx_vif * wlvif)334 int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
335 {
336 return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
337 }
338