xref: /openbmc/linux/drivers/net/wireless/ti/wl18xx/scan.c (revision 2b27bdcc)
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