25  * struct radar_types - contains array of patterns defined for one DFS domain
36 /* percentage on ppb threshold to trigger detection */
38 #define PPB_THRESH_RATE(PPB, RATE) ((PPB * RATE + 100 - RATE) / 100)
43 #define WIDTH_LOWER(X) ((X*(100-WIDTH_TOLERANCE)+50)/100)
49 	(PRF2PRI(PMAX) - PRI_TOLERANCE),			\
54 /* radar types as defined by ETSI EN-301-893 v1.5.1 */
74 	PMIN - PRI_TOLERANCE,					\
106 	PMIN - PRI_TOLERANCE,					\
135  * get_dfs_domain_radar_types() - get radar types for a given DFS domain
145 		if (dfs_domains[i]->region == region)  in get_dfs_domain_radar_types()
152  * struct channel_detector - detector elements for a DFS channel
154  * @freq: frequency for this channel detector in MHz
155  * @detectors: array of dynamically created detector elements for this freq
157  * Channel detectors are required to provide multi-channel DFS detection, e.g.
158  * to support off-channel scanning. A pattern detector has a list of channels
167 /* channel_detector_reset() - reset detector lines for a given channel */
174 	for (i = 0; i < dpd->num_radar_types; i++)  in channel_detector_reset()
175 		cd->detectors[i]->reset(cd->detectors[i], dpd->last_pulse_ts);  in channel_detector_reset()
178 /* channel_detector_exit() - destructor */
185 	list_del(&cd->head);  in channel_detector_exit()
187 	for (i = 0; i < dpd->num_radar_types; i++) {  in channel_detector_exit()
188 		struct pri_detector *de = cd->detectors[i];  in channel_detector_exit()
190 			de->exit(de);  in channel_detector_exit()
202 	cd = kzalloc(struct_size(cd, detectors, dpd->num_radar_types), GFP_ATOMIC);  in channel_detector_create()
206 	INIT_LIST_HEAD(&cd->head);  in channel_detector_create()
207 	cd->freq = freq;  in channel_detector_create()
209 	for (i = 0; i < dpd->num_radar_types; i++) {  in channel_detector_create()
210 		const struct radar_detector_specs *rs = &dpd->radar_spec[i];  in channel_detector_create()
214 		cd->detectors[i] = de;  in channel_detector_create()
216 	list_add(&cd->head, &dpd->channel_detectors);  in channel_detector_create()
220 	ath_dbg(dpd->common, DFS,  in channel_detector_create()
227  * channel_detector_get() - get channel detector for given frequency
231  * Return value: pointer to channel detector on success, NULL otherwise
233  * Return existing channel detector for the given frequency or return a
240 	list_for_each_entry(cd, &dpd->channel_detectors, head) {  in channel_detector_get()
241 		if (cd->freq == freq)  in channel_detector_get()
248  * DFS Pattern Detector
255 	list_for_each_entry(cd, &dpd->channel_detectors, head)  in dpd_reset()
262 	list_for_each_entry_safe(cd, cd0, &dpd->channel_detectors, head)  in dpd_exit()
275 	 * pulses received for a non-supported or un-initialized  in dpd_add_pulse()
276 	 * domain are treated as detected radars for fail-safety  in dpd_add_pulse()
278 	if (dpd->region == NL80211_DFS_UNSET)  in dpd_add_pulse()
281 	cd = channel_detector_get(dpd, event->freq);  in dpd_add_pulse()
285 	/* reset detector on time stamp wraparound, caused by TSF reset */  in dpd_add_pulse()
286 	if (event->ts < dpd->last_pulse_ts)  in dpd_add_pulse()
288 	dpd->last_pulse_ts = event->ts;  in dpd_add_pulse()
291 	for (i = 0; i < dpd->num_radar_types; i++) {  in dpd_add_pulse()
292 		struct pri_detector *pd = cd->detectors[i];  in dpd_add_pulse()
293 		struct pri_sequence *ps = pd->add_pulse(pd, event);  in dpd_add_pulse()
296 				memcpy(rs, pd->rs, sizeof(*rs));  in dpd_add_pulse()
297 			ath_dbg(dpd->common, DFS,  in dpd_add_pulse()
300 				event->freq, pd->rs->type_id,  in dpd_add_pulse()
301 				ps->pri, ps->count, ps->count_falses);  in dpd_add_pulse()
302 			pd->reset(pd, dpd->last_pulse_ts);  in dpd_add_pulse()
321 	if (dpd->region == region)  in dpd_set_domain()
324 	dpd->region = NL80211_DFS_UNSET;  in dpd_set_domain()
331 	list_for_each_entry_safe(cd, cd0, &dpd->channel_detectors, head)  in dpd_set_domain()
333 	dpd->radar_spec = rt->radar_types;  in dpd_set_domain()
334 	dpd->num_radar_types = rt->num_radar_types;  in dpd_set_domain()
336 	dpd->region = region;  in dpd_set_domain()
362 	INIT_LIST_HEAD(&dpd->channel_detectors);  in dfs_pattern_detector_init()
364 	dpd->common = common;  in dfs_pattern_detector_init()
365 	if (dpd->set_dfs_domain(dpd, region))  in dfs_pattern_detector_init()