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
32void 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}
54EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);
55
56static 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
82void 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}
95EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);
96
97void 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}
108EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);
109
110void 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}
130EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);
131
132void 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}
157EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);
158
159void 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}
169EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);
170
171static 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
205void 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}
210EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);
211
212void 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}
217EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);
218
219void 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}
225EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);
226
227void 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_rssi_notify(
263				vif,
264				NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
265				GFP_KERNEL);
266	}
267}
268EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);
269
270int wl1271_event_unmask(struct wl1271 *wl)
271{
272	int ret;
273
274	wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
275	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
276	if (ret < 0)
277		return ret;
278
279	return 0;
280}
281
282int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
283{
284	int ret;
285
286	wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
287
288	if (mbox_num > 1)
289		return -EINVAL;
290
291	/* first we read the mbox descriptor */
292	ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
293			  wl->mbox_size, false);
294	if (ret < 0)
295		return ret;
296
297	/* process the descriptor */
298	ret = wl->ops->process_mailbox_events(wl);
299	if (ret < 0)
300		return ret;
301
302	/*
303	 * TODO: we just need this because one bit is in a different
304	 * place.  Is there any better way?
305	 */
306	ret = wl->ops->ack_event(wl);
307
308	return ret;
309}
310