drivers/net/wireless/ti/wl12xx/event.c - kernel/msm-4.9 - Gitiles

 /*
  * 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 "debug.h"
 #include "reg.h"
 #include "io.h"
 #include "event.h"
 #include "ps.h"
 #include "scan.h"
 #include "wl12xx_80211.h"

 static void wl1271_event_rssi_trigger(struct wl1271 *wl,
 				      struct wl12xx_vif *wlvif,
 				      struct event_mailbox *mbox)
 {
 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
 	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 <= wlvif->rssi_thold)
 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
 	else
 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

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

 static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 {
 	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

 	if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
 		if (!wlvif->sta.ba_rx_bitmap)
 			return;
 		ieee80211_stop_rx_ba_session(vif, wlvif->sta.ba_rx_bitmap,
 					     vif->bss_conf.bssid);
 	} else {
 		u8 hlid;
 		struct wl1271_link *lnk;
 		for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
 				 WL12XX_MAX_LINKS) {
 			lnk = &wl->links[hlid];
 			if (!lnk->ba_bitmap)
 				continue;

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

 static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
 					       u8 enable)
 {
 	struct wl12xx_vif *wlvif;

 	if (enable) {
 		set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 	} else {
 		clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
 			wl1271_recalc_rx_streaming(wl, wlvif);
 		}
 	}

 }

 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 = wl->mbox;
 	struct ieee80211_vif *vif;
 	struct wl12xx_vif *wlvif;
 	u32 vector;
 	bool beacon_loss = false;
 	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) {
 			ieee80211_sched_scan_stopped(wl->hw);
 			wl->sched_scanning = false;
 		}
 	}

 	if (vector & SOFT_GEMINI_SENSE_EVENT_ID)
 		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) {
 		/* TODO: check for multi-role */
 		wl1271_info("Beacon loss detected.");

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

 	if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
 		/* TODO: check actual multi-role support */
 		wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
 			wl1271_event_rssi_trigger(wl, wlvif, mbox);
 		}
 	}

 	if (vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID) {
 		u8 role_id = mbox->role_id;
 		wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
 			     "ba_allowed = 0x%x, role_id=%d",
 			     mbox->rx_ba_allowed, role_id);

 		wl12xx_for_each_wlvif(wl, wlvif) {
 			if (role_id != 0xff && role_id != wlvif->role_id)
 				continue;

 			wlvif->ba_allowed = !!mbox->rx_ba_allowed;
 			if (!wlvif->ba_allowed)
 				wl1271_stop_ba_event(wl, wlvif);
 		}
 	}

 	if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) {
 		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
 		 */

 		/* TODO: configure only the relevant vif */
 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
 			bool success;

 			if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
 						&wlvif->flags))
 				continue;

 			success = mbox->channel_switch_status ? false : true;
 			vif = wl12xx_wlvif_to_vif(wlvif);

 			ieee80211_chswitch_done(vif, success);
 		}
 	}

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

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

 		for_each_set_bit(h, &sta_bitmap, WL12XX_MAX_LINKS) {
 			bool found = false;
 			/* find the ap vif connected to this sta */
 			wl12xx_for_each_wlvif_ap(wl, wlvif) {
 				if (!test_bit(h, wlvif->ap.sta_hlid_map))
 					continue;
 				found = true;
 				break;
 			}
 			if (!found)
 				continue;

 			vif = wl12xx_wlvif_to_vif(wlvif);
 			addr = wl->links[h].addr;

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

 	if (beacon_loss)
 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
 			vif = wl12xx_wlvif_to_vif(wlvif);
 			ieee80211_connection_loss(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)
 {
 	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], wl->mbox,
 		    sizeof(*wl->mbox), false);

 	/* process the descriptor */
 	ret = wl1271_event_process(wl);
 	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;
 }
	/*
	* 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 "debug.h"
	#include "reg.h"
	#include "io.h"
	#include "event.h"
	#include "ps.h"
	#include "scan.h"
	#include "wl12xx_80211.h"

	static void wl1271_event_rssi_trigger(struct wl1271 *wl,
	struct wl12xx_vif *wlvif,
	struct event_mailbox *mbox)
	{
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
	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 <= wlvif->rssi_thold)
	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
	else
	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

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

	static void wl1271_stop_ba_event(struct wl1271 wl, struct wl12xx_vif wlvif)
	{
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

	if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
	if (!wlvif->sta.ba_rx_bitmap)
	return;
	ieee80211_stop_rx_ba_session(vif, wlvif->sta.ba_rx_bitmap,
	vif->bss_conf.bssid);
	} else {
	u8 hlid;
	struct wl1271_link *lnk;
	for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
	WL12XX_MAX_LINKS) {
	lnk = &wl->links[hlid];
	if (!lnk->ba_bitmap)
	continue;

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

	static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
	u8 enable)
	{
	struct wl12xx_vif *wlvif;

	if (enable) {
	set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
	} else {
	clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	wl1271_recalc_rx_streaming(wl, wlvif);
	}
	}

	}

	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 = wl->mbox;
	struct ieee80211_vif *vif;
	struct wl12xx_vif *wlvif;
	u32 vector;
	bool beacon_loss = false;
	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) {
	ieee80211_sched_scan_stopped(wl->hw);
	wl->sched_scanning = false;
	}
	}

	if (vector & SOFT_GEMINI_SENSE_EVENT_ID)
	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) {
	/* TODO: check for multi-role */
	wl1271_info("Beacon loss detected.");

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

	if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
	/* TODO: check actual multi-role support */
	wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	wl1271_event_rssi_trigger(wl, wlvif, mbox);
	}
	}

	if (vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID) {
	u8 role_id = mbox->role_id;
	wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
	"ba_allowed = 0x%x, role_id=%d",
	mbox->rx_ba_allowed, role_id);

	wl12xx_for_each_wlvif(wl, wlvif) {
	if (role_id != 0xff && role_id != wlvif->role_id)
	continue;

	wlvif->ba_allowed = !!mbox->rx_ba_allowed;
	if (!wlvif->ba_allowed)
	wl1271_stop_ba_event(wl, wlvif);
	}
	}

	if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) {
	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
	*/

	/* TODO: configure only the relevant vif */
	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	bool success;

	if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
	&wlvif->flags))
	continue;

	success = mbox->channel_switch_status ? false : true;
	vif = wl12xx_wlvif_to_vif(wlvif);

	ieee80211_chswitch_done(vif, success);
	}
	}

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

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

	for_each_set_bit(h, &sta_bitmap, WL12XX_MAX_LINKS) {
	bool found = false;
	/* find the ap vif connected to this sta */
	wl12xx_for_each_wlvif_ap(wl, wlvif) {
	if (!test_bit(h, wlvif->ap.sta_hlid_map))
	continue;
	found = true;
	break;
	}
	if (!found)
	continue;

	vif = wl12xx_wlvif_to_vif(wlvif);
	addr = wl->links[h].addr;

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

	if (beacon_loss)
	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	vif = wl12xx_wlvif_to_vif(wlvif);
	ieee80211_connection_loss(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)
	{
	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], wl->mbox,
	sizeof(*wl->mbox), false);

	/* process the descriptor */
	ret = wl1271_event_process(wl);
	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;
	}