1 /*
2  * This file is part of wl1271
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23 
24 #include "wlcore.h"
25 #include "debug.h"
26 #include "io.h"
27 #include "event.h"
28 #include "ps.h"
29 #include "scan.h"
30 #include "wl12xx_80211.h"
31 
32 void wlcore_event_rssi_trigger(struct wl1271 *wl, s8 *metric_arr)
33 {
34 	struct wl12xx_vif *wlvif;
35 	struct ieee80211_vif *vif;
36 	enum nl80211_cqm_rssi_threshold_event event;
37 	s8 metric = metric_arr[0];
38 
39 	wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
40 
41 	/* TODO: check actual multi-role support */
42 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
43 		if (metric <= wlvif->rssi_thold)
44 			event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
45 		else
46 			event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
47 
48 		vif = wl12xx_wlvif_to_vif(wlvif);
49 		if (event != wlvif->last_rssi_event)
50 			ieee80211_cqm_rssi_notify(vif, event, GFP_KERNEL);
51 		wlvif->last_rssi_event = event;
52 	}
53 }
54 EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
55 
56 static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
57 {
58 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
59 
60 	if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
61 		u8 hlid = wlvif->sta.hlid;
62 		if (!wl->links[hlid].ba_bitmap)
63 			return;
64 		ieee80211_stop_rx_ba_session(vif, wl->links[hlid].ba_bitmap,
65 					     vif->bss_conf.bssid);
66 	} else {
67 		u8 hlid;
68 		struct wl1271_link *lnk;
69 		for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
70 				 wl->num_links) {
71 			lnk = &wl->links[hlid];
72 			if (!lnk->ba_bitmap)
73 				continue;
74 
75 			ieee80211_stop_rx_ba_session(vif,
76 						     lnk->ba_bitmap,
77 						     lnk->addr);
78 		}
79 	}
80 }
81 
82 void wlcore_event_soft_gemini_sense(struct wl1271 *wl, u8 enable)
83 {
84 	struct wl12xx_vif *wlvif;
85 
86 	if (enable) {
87 		set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
88 	} else {
89 		clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
90 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
91 			wl1271_recalc_rx_streaming(wl, wlvif);
92 		}
93 	}
94 }
95 EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
96 
97 void wlcore_event_sched_scan_completed(struct wl1271 *wl,
98 				       u8 status)
99 {
100 	wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
101 		     status);
102 
103 	if (wl->sched_vif) {
104 		ieee80211_sched_scan_stopped(wl->hw);
105 		wl->sched_vif = NULL;
106 	}
107 }
108 EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
109 
110 void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
111 				   unsigned long roles_bitmap,
112 				   unsigned long allowed_bitmap)
113 {
114 	struct wl12xx_vif *wlvif;
115 
116 	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
117 		     __func__, roles_bitmap, allowed_bitmap);
118 
119 	wl12xx_for_each_wlvif(wl, wlvif) {
120 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
121 		    !test_bit(wlvif->role_id , &roles_bitmap))
122 			continue;
123 
124 		wlvif->ba_allowed = !!test_bit(wlvif->role_id,
125 					       &allowed_bitmap);
126 		if (!wlvif->ba_allowed)
127 			wl1271_stop_ba_event(wl, wlvif);
128 	}
129 }
130 EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
131 
132 void wlcore_event_channel_switch(struct wl1271 *wl,
133 				 unsigned long roles_bitmap,
134 				 bool success)
135 {
136 	struct wl12xx_vif *wlvif;
137 	struct ieee80211_vif *vif;
138 
139 	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
140 		     __func__, roles_bitmap, success);
141 
142 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
143 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
144 		    !test_bit(wlvif->role_id , &roles_bitmap))
145 			continue;
146 
147 		if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
148 					&wlvif->flags))
149 			continue;
150 
151 		vif = wl12xx_wlvif_to_vif(wlvif);
152 
153 		ieee80211_chswitch_done(vif, success);
154 		cancel_delayed_work(&wlvif->channel_switch_work);
155 	}
156 }
157 EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
158 
159 void wlcore_event_dummy_packet(struct wl1271 *wl)
160 {
161 	if (wl->plt) {
162 		wl1271_info("Got DUMMY_PACKET event in PLT mode.  FW bug, ignoring.");
163 		return;
164 	}
165 
166 	wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
167 	wl1271_tx_dummy_packet(wl);
168 }
169 EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
170 
171 static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
172 {
173 	u32 num_packets = wl->conf.tx.max_tx_retries;
174 	struct wl12xx_vif *wlvif;
175 	struct ieee80211_vif *vif;
176 	struct ieee80211_sta *sta;
177 	const u8 *addr;
178 	int h;
179 
180 	for_each_set_bit(h, &sta_bitmap, wl->num_links) {
181 		bool found = false;
182 		/* find the ap vif connected to this sta */
183 		wl12xx_for_each_wlvif_ap(wl, wlvif) {
184 			if (!test_bit(h, wlvif->ap.sta_hlid_map))
185 				continue;
186 			found = true;
187 			break;
188 		}
189 		if (!found)
190 			continue;
191 
192 		vif = wl12xx_wlvif_to_vif(wlvif);
193 		addr = wl->links[h].addr;
194 
195 		rcu_read_lock();
196 		sta = ieee80211_find_sta(vif, addr);
197 		if (sta) {
198 			wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
199 			ieee80211_report_low_ack(sta, num_packets);
200 		}
201 		rcu_read_unlock();
202 	}
203 }
204 
205 void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
206 {
207 	wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
208 	wlcore_disconnect_sta(wl, sta_bitmap);
209 }
210 EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
211 
212 void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
213 {
214 	wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
215 	wlcore_disconnect_sta(wl, sta_bitmap);
216 }
217 EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
218 
219 void wlcore_event_roc_complete(struct wl1271 *wl)
220 {
221 	wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
222 	if (wl->roc_vif)
223 		ieee80211_ready_on_channel(wl->hw);
224 }
225 EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
226 
227 void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
228 {
229 	/*
230 	 * We are HW_MONITOR device. On beacon loss - queue
231 	 * connection loss work. Cancel it on REGAINED event.
232 	 */
233 	struct wl12xx_vif *wlvif;
234 	struct ieee80211_vif *vif;
235 	int delay = wl->conf.conn.synch_fail_thold *
236 				wl->conf.conn.bss_lose_timeout;
237 
238 	wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);
239 
240 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
241 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
242 		    !test_bit(wlvif->role_id , &roles_bitmap))
243 			continue;
244 
245 		vif = wl12xx_wlvif_to_vif(wlvif);
246 
247 		/* don't attempt roaming in case of p2p */
248 		if (wlvif->p2p) {
249 			ieee80211_connection_loss(vif);
250 			continue;
251 		}
252 
253 		/*
254 		 * if the work is already queued, it should take place.
255 		 * We don't want to delay the connection loss
256 		 * indication any more.
257 		 */
258 		ieee80211_queue_delayed_work(wl->hw,
259 					     &wlvif->connection_loss_work,
260 					     msecs_to_jiffies(delay));
261 
262 		ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
263 	}
264 }
265 EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
266 
267 int wl1271_event_unmask(struct wl1271 *wl)
268 {
269 	int ret;
270 
271 	wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
272 	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
273 	if (ret < 0)
274 		return ret;
275 
276 	return 0;
277 }
278 
279 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
280 {
281 	int ret;
282 
283 	wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
284 
285 	if (mbox_num > 1)
286 		return -EINVAL;
287 
288 	/* first we read the mbox descriptor */
289 	ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
290 			  wl->mbox_size, false);
291 	if (ret < 0)
292 		return ret;
293 
294 	/* process the descriptor */
295 	ret = wl->ops->process_mailbox_events(wl);
296 	if (ret < 0)
297 		return ret;
298 
299 	/*
300 	 * TODO: we just need this because one bit is in a different
301 	 * place.  Is there any better way?
302 	 */
303 	ret = wl->ops->ack_event(wl);
304 
305 	return ret;
306 }
307