[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / wl12xx / event.c

/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "wl12xx.h"
#include "reg.h"
#include "io.h"
#include "event.h"
#include "ps.h"
#include "scan.h"
#include "wl12xx_80211.h"

void wl1271_pspoll_work(struct work_struct *work)
{
	struct ieee80211_vif *vif;
	struct wl12xx_vif *wlvif;
	struct delayed_work *dwork;
	struct wl1271 *wl;
	int ret;

	dwork = container_of(work, struct delayed_work, work);
	wlvif = container_of(dwork, struct wl12xx_vif, pspoll_work);
	vif = container_of((void *)wlvif, struct ieee80211_vif, drv_priv);
	wl = wlvif->wl;

	wl1271_debug(DEBUG_EVENT, "pspoll work");

	mutex_lock(&wl->mutex);

	if (unlikely(wl->state == WL1271_STATE_OFF))
		goto out;

	if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
		goto out;

	if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
		goto out;

	/*
	 * if we end up here, then we were in powersave when the pspoll
	 * delivery failure occurred, and no-one changed state since, so
	 * we should go back to powersave.
	 */
	ret = wl1271_ps_elp_wakeup(wl);
	if (ret < 0)
		goto out;

	wl1271_ps_set_mode(wl, wlvif, STATION_POWER_SAVE_MODE,
			   wlvif->basic_rate, true);

	wl1271_ps_elp_sleep(wl);
out:
	mutex_unlock(&wl->mutex);
};

static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl,
					      struct wl12xx_vif *wlvif)
{
	int delay = wl->conf.conn.ps_poll_recovery_period;
	int ret;

	wl->ps_poll_failures++;
	if (wl->ps_poll_failures == 1)
		wl1271_info("AP with dysfunctional ps-poll, "
			    "trying to work around it.");

	/* force active mode receive data from the AP */
	if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
		ret = wl1271_ps_set_mode(wl, wlvif, STATION_ACTIVE_MODE,
					 wlvif->basic_rate, true);
		if (ret < 0)
			return;
		set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
		ieee80211_queue_delayed_work(wl->hw, &wlvif->pspoll_work,
					     msecs_to_jiffies(delay));
	}

	/*
	 * If already in active mode, lets we should be getting data from
	 * the AP right away. If we enter PSM too fast after this, and data
	 * remains on the AP, we will get another event like this, and we'll
	 * go into active once more.
	 */
}

static int wl1271_event_ps_report(struct wl1271 *wl,
				  struct wl12xx_vif *wlvif,
				  struct event_mailbox *mbox,
				  bool *beacon_loss)
{
	int ret = 0;
	u32 total_retries = wl->conf.conn.psm_entry_retries;

	wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);

	switch (mbox->ps_status) {
	case EVENT_ENTER_POWER_SAVE_FAIL:
		wl1271_debug(DEBUG_PSM, "PSM entry failed");

		if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
			/* remain in active mode */
			wl->psm_entry_retry = 0;
			break;
		}

		if (wl->psm_entry_retry < total_retries) {
			wl->psm_entry_retry++;
			ret = wl1271_ps_set_mode(wl, wlvif,
						 STATION_POWER_SAVE_MODE,
						 wlvif->basic_rate, true);
		} else {
			wl1271_info("No ack to nullfunc from AP.");
			wl->psm_entry_retry = 0;
			*beacon_loss = true;
		}
		break;
	case EVENT_ENTER_POWER_SAVE_SUCCESS:
		wl->psm_entry_retry = 0;

		/* enable beacon filtering */
		ret = wl1271_acx_beacon_filter_opt(wl, wlvif, true);
		if (ret < 0)
			break;

		/*
		 * BET has only a minor effect in 5GHz and masks
		 * channel switch IEs, so we only enable BET on 2.4GHz
		*/
		if (wl->band == IEEE80211_BAND_2GHZ)
			/* enable beacon early termination */
			ret = wl1271_acx_bet_enable(wl, wlvif, true);

		if (wlvif->ps_compl) {
			complete(wlvif->ps_compl);
			wlvif->ps_compl = NULL;
		}
		break;
	default:
		break;
	}

	return ret;
}

static void wl1271_event_rssi_trigger(struct wl1271 *wl,
				      struct event_mailbox *mbox)
{
	enum nl80211_cqm_rssi_threshold_event event;
	s8 metric = mbox->rssi_snr_trigger_metric[0];

	wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);

	if (metric <= wl->rssi_thold)
		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
	else
		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

	if (event != wl->last_rssi_event)
		ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
	wl->last_rssi_event = event;
}

static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
	if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
		if (!wl->ba_rx_bitmap)
			return;
		ieee80211_stop_rx_ba_session(wl->vif, wl->ba_rx_bitmap,
					     wl->vif->bss_conf.bssid);
	} else {
		int i;
		struct wl1271_link *lnk;
		for (i = WL1271_AP_STA_HLID_START; i < AP_MAX_LINKS; i++) {
			lnk = &wl->links[i];
			if (!wl1271_is_active_sta(wl, i) || !lnk->ba_bitmap)
				continue;

			ieee80211_stop_rx_ba_session(wl->vif,
						     lnk->ba_bitmap,
						     lnk->addr);
		}
	}
}

static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
					       u8 enable)
{
	if (enable) {
		/* disable dynamic PS when requested by the firmware */
		ieee80211_disable_dyn_ps(wl->vif);
		set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
	} else {
		ieee80211_enable_dyn_ps(wl->vif);
		clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
		wl1271_recalc_rx_streaming(wl);
	}

}

static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
{
	wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
	wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
	wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
}

static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
{
	struct ieee80211_vif *vif = wl->vif; /* TODO: get as param */
	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
	int ret;
	u32 vector;
	bool beacon_loss = false;
	bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
	bool disconnect_sta = false;
	unsigned long sta_bitmap = 0;

	wl1271_event_mbox_dump(mbox);

	vector = le32_to_cpu(mbox->events_vector);
	vector &= ~(le32_to_cpu(mbox->events_mask));
	wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);

	if (vector & SCAN_COMPLETE_EVENT_ID) {
		wl1271_debug(DEBUG_EVENT, "status: 0x%x",
			     mbox->scheduled_scan_status);

		wl1271_scan_stm(wl, wl->scan_vif);
	}

	if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
		wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT "
			     "(status 0x%0x)", mbox->scheduled_scan_status);

		wl1271_scan_sched_scan_results(wl);
	}

	if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) {
		wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT "
			     "(status 0x%0x)", mbox->scheduled_scan_status);
		if (wl->sched_scanning) {
			wl1271_scan_sched_scan_stop(wl);
			ieee80211_sched_scan_stopped(wl->hw);
		}
	}

	if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
	    wlvif->bss_type == BSS_TYPE_STA_BSS)
		wl12xx_event_soft_gemini_sense(wl,
					       mbox->soft_gemini_sense_info);

	/*
	 * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
	 * filtering) is enabled. Without PSM, the stack will receive all
	 * beacons and can detect beacon loss by itself.
	 *
	 * As there's possibility that the driver disables PSM before receiving
	 * BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
	 *
	 */
	if ((vector & BSS_LOSE_EVENT_ID) && !is_ap) {
		wl1271_info("Beacon loss detected.");

		/* indicate to the stack, that beacons have been lost */
		beacon_loss = true;
	}

	if ((vector & PS_REPORT_EVENT_ID) && !is_ap) {
		wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
		ret = wl1271_event_ps_report(wl, wlvif, mbox, &beacon_loss);
		if (ret < 0)
			return ret;
	}

	if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap)
		wl1271_event_pspoll_delivery_fail(wl, wlvif);

	if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
		wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
		if (wl->vif)
			wl1271_event_rssi_trigger(wl, mbox);
	}

	if ((vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID)) {
		wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
			     "ba_allowed = 0x%x", mbox->rx_ba_allowed);

		wl->ba_allowed = !!mbox->rx_ba_allowed;

		if (wl->vif && !wl->ba_allowed)
			wl1271_stop_ba_event(wl, wlvif);
	}

	if ((vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) && !is_ap) {
		wl1271_debug(DEBUG_EVENT, "CHANNEL_SWITCH_COMPLETE_EVENT_ID. "
					  "status = 0x%x",
					  mbox->channel_switch_status);
		/*
		 * That event uses for two cases:
		 * 1) channel switch complete with status=0
		 * 2) channel switch failed status=1
		 */
		if (test_and_clear_bit(WL1271_FLAG_CS_PROGRESS, &wl->flags) &&
		    (wl->vif))
			ieee80211_chswitch_done(wl->vif,
				mbox->channel_switch_status ? false : true);
	}

	if ((vector & DUMMY_PACKET_EVENT_ID)) {
		wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
		if (wl->vif)
			wl1271_tx_dummy_packet(wl);
	}

	/*
	 * "TX retries exceeded" has a different meaning according to mode.
	 * In AP mode the offending station is disconnected.
	 */
	if ((vector & MAX_TX_RETRY_EVENT_ID) && is_ap) {
		wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
		sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
		disconnect_sta = true;
	}

	if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
		wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
		sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
		disconnect_sta = true;
	}

	if (is_ap && disconnect_sta) {
		u32 num_packets = wl->conf.tx.max_tx_retries;
		struct ieee80211_sta *sta;
		const u8 *addr;
		int h;

		for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
		     h < AP_MAX_LINKS;
		     h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
			if (!wl1271_is_active_sta(wl, h))
				continue;

			addr = wl->links[h].addr;

			rcu_read_lock();
			sta = ieee80211_find_sta(wl->vif, addr);
			if (sta) {
				wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
				ieee80211_report_low_ack(sta, num_packets);
			}
			rcu_read_unlock();
		}
	}

	if (wl->vif && beacon_loss)
		ieee80211_connection_loss(wl->vif);

	return 0;
}

int wl1271_event_unmask(struct wl1271 *wl)
{
	int ret;

	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
	if (ret < 0)
		return ret;

	return 0;
}

void wl1271_event_mbox_config(struct wl1271 *wl)
{
	wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
	wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);

	wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
		     wl->mbox_ptr[0], wl->mbox_ptr[1]);
}

int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
{
	struct event_mailbox mbox;
	int ret;

	wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);

	if (mbox_num > 1)
		return -EINVAL;

	/* first we read the mbox descriptor */
	wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
		    sizeof(struct event_mailbox), false);

	/* process the descriptor */
	ret = wl1271_event_process(wl, &mbox);
	if (ret < 0)
		return ret;

	/* then we let the firmware know it can go on...*/
	wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);

	return 0;
}
Commit	Line	Data
f5fc0f86 LC	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
00d20100 SL	24	#include "wl12xx.h"
	25	#include "reg.h"
	26	#include "io.h"
	27	#include "event.h"
	28	#include "ps.h"
	29	#include "scan.h"
66497dc3	30	#include "wl12xx_80211.h"
f5fc0f86	31
90494a90 JO	32	void wl1271_pspoll_work(struct work_struct *work)
90494a90 JO	33	{
d2d66c56 EP	34	struct ieee80211_vif *vif;
d2d66c56 EP	35	struct wl12xx_vif *wlvif;
90494a90 JO	36	struct delayed_work *dwork;
90494a90 JO	37	struct wl1271 *wl;
c1b193eb	38	int ret;
90494a90 JO	39
90494a90 JO	40	dwork = container_of(work, struct delayed_work, work);
252efa4f EP	41	wlvif = container_of(dwork, struct wl12xx_vif, pspoll_work);
	42	vif = container_of((void *)wlvif, struct ieee80211_vif, drv_priv);
	43	wl = wlvif->wl;
90494a90 JO	44
	45	wl1271_debug(DEBUG_EVENT, "pspoll work");
	46
	47	mutex_lock(&wl->mutex);
	48
8c7f4f31 JO	49	if (unlikely(wl->state == WL1271_STATE_OFF))
	50	goto out;
	51
90494a90 JO	52	if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
	53	goto out;
	54
	55	if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
	56	goto out;
	57
	58	/*
	59	* if we end up here, then we were in powersave when the pspoll
	60	* delivery failure occurred, and no-one changed state since, so
	61	* we should go back to powersave.
	62	*/
c1b193eb EP	63	ret = wl1271_ps_elp_wakeup(wl);
	64	if (ret < 0)
	65	goto out;
	66
0603d891 EP	67	wl1271_ps_set_mode(wl, wlvif, STATION_POWER_SAVE_MODE,
0603d891 EP	68	wlvif->basic_rate, true);
90494a90	69
c1b193eb	70	wl1271_ps_elp_sleep(wl);
90494a90 JO	71	out:
	72	mutex_unlock(&wl->mutex);
	73	};
	74
d2d66c56 EP	75	static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl,
d2d66c56 EP	76	struct wl12xx_vif *wlvif)
90494a90 JO	77	{
	78	int delay = wl->conf.conn.ps_poll_recovery_period;
	79	int ret;
	80
	81	wl->ps_poll_failures++;
	82	if (wl->ps_poll_failures == 1)
	83	wl1271_info("AP with dysfunctional ps-poll, "
	84	"trying to work around it.");
	85
	86	/* force active mode receive data from the AP */
	87	if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
0603d891	88	ret = wl1271_ps_set_mode(wl, wlvif, STATION_ACTIVE_MODE,
d2d66c56	89	wlvif->basic_rate, true);
90494a90 JO	90	if (ret < 0)
	91	return;
	92	set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
252efa4f	93	ieee80211_queue_delayed_work(wl->hw, &wlvif->pspoll_work,
90494a90 JO	94	msecs_to_jiffies(delay));
	95	}
	96
	97	/*
	98	* If already in active mode, lets we should be getting data from
	99	* the AP right away. If we enter PSM too fast after this, and data
	100	* remains on the AP, we will get another event like this, and we'll
	101	* go into active once more.
	102	*/
	103	}
	104
19ad0715	105	static int wl1271_event_ps_report(struct wl1271 *wl,
d2d66c56	106	struct wl12xx_vif *wlvif,
19ad0715 JO	107	struct event_mailbox *mbox,
	108	bool *beacon_loss)
	109	{
	110	int ret = 0;
65cddbf1	111	u32 total_retries = wl->conf.conn.psm_entry_retries;
19ad0715 JO	112
	113	wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
	114
	115	switch (mbox->ps_status) {
	116	case EVENT_ENTER_POWER_SAVE_FAIL:
d8c42c0c JO	117	wl1271_debug(DEBUG_PSM, "PSM entry failed");
d8c42c0c JO	118
71449f8d	119	if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
d8c42c0c	120	/* remain in active mode */
461fa136 JO	121	wl->psm_entry_retry = 0;
	122	break;
	123	}
	124
65cddbf1	125	if (wl->psm_entry_retry < total_retries) {
19ad0715	126	wl->psm_entry_retry++;
0603d891 EP	127	ret = wl1271_ps_set_mode(wl, wlvif,
0603d891 EP	128	STATION_POWER_SAVE_MODE,
d2d66c56	129	wlvif->basic_rate, true);
19ad0715	130	} else {
1a186a51	131	wl1271_info("No ack to nullfunc from AP.");
19ad0715	132	wl->psm_entry_retry = 0;
d60772f6	133	*beacon_loss = true;
19ad0715 JO	134	}
	135	break;
	136	case EVENT_ENTER_POWER_SAVE_SUCCESS:
	137	wl->psm_entry_retry = 0;
d8c42c0c JO	138
d8c42c0c JO	139	/* enable beacon filtering */
0603d891	140	ret = wl1271_acx_beacon_filter_opt(wl, wlvif, true);
d8c42c0c JO	141	if (ret < 0)
	142	break;
	143
0e44eb20 SL	144	/*
	145	* BET has only a minor effect in 5GHz and masks
	146	* channel switch IEs, so we only enable BET on 2.4GHz
	147	*/
	148	if (wl->band == IEEE80211_BAND_2GHZ)
	149	/* enable beacon early termination */
0603d891	150	ret = wl1271_acx_bet_enable(wl, wlvif, true);
9439064c	151
6ec45dc2 EP	152	if (wlvif->ps_compl) {
	153	complete(wlvif->ps_compl);
	154	wlvif->ps_compl = NULL;
9439064c	155	}
19ad0715	156	break;
19ad0715 JO	157	default:
	158	break;
	159	}
	160
	161	return ret;
	162	}
	163
00236aed JO	164	static void wl1271_event_rssi_trigger(struct wl1271 *wl,
	165	struct event_mailbox *mbox)
	166	{
	167	enum nl80211_cqm_rssi_threshold_event event;
	168	s8 metric = mbox->rssi_snr_trigger_metric[0];
	169
	170	wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
	171
	172	if (metric <= wl->rssi_thold)
	173	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
	174	else
	175	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
	176
	177	if (event != wl->last_rssi_event)
	178	ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
	179	wl->last_rssi_event = event;
	180	}
	181
536129c8	182	static void wl1271_stop_ba_event(struct wl1271 wl, struct wl12xx_vif wlvif)
70559a06	183	{
536129c8	184	if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
f4d3b6ab AN	185	if (!wl->ba_rx_bitmap)
	186	return;
	187	ieee80211_stop_rx_ba_session(wl->vif, wl->ba_rx_bitmap,
cdf09495	188	wl->vif->bss_conf.bssid);
f4d3b6ab AN	189	} else {
	190	int i;
	191	struct wl1271_link *lnk;
6b661895	192	for (i = WL1271_AP_STA_HLID_START; i < AP_MAX_LINKS; i++) {
f4d3b6ab AN	193	lnk = &wl->links[i];
	194	if (!wl1271_is_active_sta(wl, i) \|\| !lnk->ba_bitmap)
	195	continue;
	196
	197	ieee80211_stop_rx_ba_session(wl->vif,
	198	lnk->ba_bitmap,
	199	lnk->addr);
	200	}
	201	}
70559a06 SL	202	}
70559a06 SL	203
77ddaa10 EP	204	static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
	205	u8 enable)
	206	{
	207	if (enable) {
	208	/* disable dynamic PS when requested by the firmware */
	209	ieee80211_disable_dyn_ps(wl->vif);
	210	set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
	211	} else {
	212	ieee80211_enable_dyn_ps(wl->vif);
	213	clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
	214	wl1271_recalc_rx_streaming(wl);
	215	}
	216
	217	}
	218
f5fc0f86 LC	219	static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
	220	{
	221	wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
	222	wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
	223	wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
	224	}
	225
	226	static int wl1271_event_process(struct wl1271 wl, struct event_mailbox mbox)
	227	{
d2d66c56 EP	228	struct ieee80211_vif vif = wl->vif; / TODO: get as param */
d2d66c56 EP	229	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
f5fc0f86 LC	230	int ret;
f5fc0f86 LC	231	u32 vector;
19ad0715	232	bool beacon_loss = false;
536129c8	233	bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
3618f30f AN	234	bool disconnect_sta = false;
3618f30f AN	235	unsigned long sta_bitmap = 0;
f5fc0f86 LC	236
	237	wl1271_event_mbox_dump(mbox);
	238
d0f63b20 LC	239	vector = le32_to_cpu(mbox->events_vector);
d0f63b20 LC	240	vector &= ~(le32_to_cpu(mbox->events_mask));
f5fc0f86 LC	241	wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
	242
	243	if (vector & SCAN_COMPLETE_EVENT_ID) {
34dd2aaa LC	244	wl1271_debug(DEBUG_EVENT, "status: 0x%x",
	245	mbox->scheduled_scan_status);
	246
784f694d	247	wl1271_scan_stm(wl, wl->scan_vif);
f5fc0f86 LC	248	}
f5fc0f86 LC	249
6394c01b LC	250	if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
	251	wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT "
	252	"(status 0x%0x)", mbox->scheduled_scan_status);
33c2c06c LC	253
33c2c06c LC	254	wl1271_scan_sched_scan_results(wl);
6394c01b LC	255	}
	256
	257	if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) {
	258	wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT "
	259	"(status 0x%0x)", mbox->scheduled_scan_status);
33c2c06c LC	260	if (wl->sched_scanning) {
	261	wl1271_scan_sched_scan_stop(wl);
	262	ieee80211_sched_scan_stopped(wl->hw);
	263	}
6394c01b LC	264	}
6394c01b LC	265
8d2ef7bd	266	if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
536129c8	267	wlvif->bss_type == BSS_TYPE_STA_BSS)
77ddaa10 EP	268	wl12xx_event_soft_gemini_sense(wl,
77ddaa10 EP	269	mbox->soft_gemini_sense_info);
8d2ef7bd	270
b771eee5 JO	271	/*
	272	* The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
	273	* filtering) is enabled. Without PSM, the stack will receive all
	274	* beacons and can detect beacon loss by itself.
64e29e44 TP	275	*
	276	* As there's possibility that the driver disables PSM before receiving
	277	* BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
	278	*
b771eee5	279	*/
203c903c	280	if ((vector & BSS_LOSE_EVENT_ID) && !is_ap) {
1a186a51	281	wl1271_info("Beacon loss detected.");
f5fc0f86	282
b771eee5	283	/* indicate to the stack, that beacons have been lost */
19ad0715 JO	284	beacon_loss = true;
	285	}
	286
203c903c	287	if ((vector & PS_REPORT_EVENT_ID) && !is_ap) {
19ad0715	288	wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
d2d66c56	289	ret = wl1271_event_ps_report(wl, wlvif, mbox, &beacon_loss);
19ad0715 JO	290	if (ret < 0)
	291	return ret;
	292	}
	293
203c903c	294	if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap)
d2d66c56	295	wl1271_event_pspoll_delivery_fail(wl, wlvif);
90494a90	296
00236aed JO	297	if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
	298	wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
	299	if (wl->vif)
	300	wl1271_event_rssi_trigger(wl, mbox);
	301	}
	302
f4d3b6ab	303	if ((vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID)) {
70559a06	304	wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
c690ec81	305	"ba_allowed = 0x%x", mbox->rx_ba_allowed);
70559a06	306
f4d3b6ab AN	307	wl->ba_allowed = !!mbox->rx_ba_allowed;
	308
	309	if (wl->vif && !wl->ba_allowed)
536129c8	310	wl1271_stop_ba_event(wl, wlvif);
70559a06 SL	311	}
70559a06 SL	312
6d158ff3 SL	313	if ((vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) && !is_ap) {
	314	wl1271_debug(DEBUG_EVENT, "CHANNEL_SWITCH_COMPLETE_EVENT_ID. "
	315	"status = 0x%x",
	316	mbox->channel_switch_status);
	317	/*
	318	* That event uses for two cases:
	319	* 1) channel switch complete with status=0
	320	* 2) channel switch failed status=1
	321	*/
	322	if (test_and_clear_bit(WL1271_FLAG_CS_PROGRESS, &wl->flags) &&
	323	(wl->vif))
	324	ieee80211_chswitch_done(wl->vif,
	325	mbox->channel_switch_status ? false : true);
	326	}
	327
79ebec76	328	if ((vector & DUMMY_PACKET_EVENT_ID)) {
ae47c45f SL	329	wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
	330	if (wl->vif)
	331	wl1271_tx_dummy_packet(wl);
	332	}
	333
3618f30f AN	334	/*
	335	* "TX retries exceeded" has a different meaning according to mode.
	336	* In AP mode the offending station is disconnected.
	337	*/
	338	if ((vector & MAX_TX_RETRY_EVENT_ID) && is_ap) {
	339	wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
	340	sta_bitmap \|= le16_to_cpu(mbox->sta_tx_retry_exceeded);
	341	disconnect_sta = true;
	342	}
	343
	344	if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
	345	wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
	346	sta_bitmap \|= le16_to_cpu(mbox->sta_aging_status);
	347	disconnect_sta = true;
	348	}
	349
	350	if (is_ap && disconnect_sta) {
	351	u32 num_packets = wl->conf.tx.max_tx_retries;
	352	struct ieee80211_sta *sta;
	353	const u8 *addr;
	354	int h;
	355
	356	for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
	357	h < AP_MAX_LINKS;
	358	h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
	359	if (!wl1271_is_active_sta(wl, h))
	360	continue;
	361
	362	addr = wl->links[h].addr;
	363
	364	rcu_read_lock();
	365	sta = ieee80211_find_sta(wl->vif, addr);
	366	if (sta) {
	367	wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
	368	ieee80211_report_low_ack(sta, num_packets);
	369	}
	370	rcu_read_unlock();
	371	}
	372	}
	373
d60772f6 JO	374	if (wl->vif && beacon_loss)
d60772f6 JO	375	ieee80211_connection_loss(wl->vif);
f5fc0f86 LC	376
	377	return 0;
	378	}
	379
	380	int wl1271_event_unmask(struct wl1271 *wl)
	381	{
	382	int ret;
	383
	384	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
	385	if (ret < 0)
	386	return ret;
	387
	388	return 0;
	389	}
	390
	391	void wl1271_event_mbox_config(struct wl1271 *wl)
	392	{
7b048c52	393	wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
f5fc0f86 LC	394	wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
	395
	396	wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
	397	wl->mbox_ptr[0], wl->mbox_ptr[1]);
	398	}
	399
13f2dc52	400	int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
f5fc0f86 LC	401	{
	402	struct event_mailbox mbox;
	403	int ret;
	404
	405	wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
	406
	407	if (mbox_num > 1)
	408	return -EINVAL;
	409
	410	/* first we read the mbox descriptor */
7b048c52 TP	411	wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
7b048c52 TP	412	sizeof(struct event_mailbox), false);
f5fc0f86 LC	413
	414	/* process the descriptor */
	415	ret = wl1271_event_process(wl, &mbox);
	416	if (ret < 0)
	417	return ret;
	418
	419	/* then we let the firmware know it can go on...*/
7b048c52	420	wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
f5fc0f86 LC	421
	422	return 0;
	423	}