drivers/net/wireless/ti/wlcore/event.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of wl1271
  *
  * Copyright (C) 2008-2009 Nokia Corporation
  *
  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
  */

 #include "wlcore.h"
 #include "debug.h"
 #include "io.h"
 #include "event.h"
 #include "ps.h"
 #include "scan.h"
 #include "wl12xx_80211.h"
 #include "hw_ops.h"

 #define WL18XX_LOGGER_SDIO_BUFF_MAX	(0x1020)
 #define WL18XX_DATA_RAM_BASE_ADDRESS	(0x20000000)
 #define WL18XX_LOGGER_SDIO_BUFF_ADDR	(0x40159c)
 #define WL18XX_LOGGER_BUFF_OFFSET	(sizeof(struct fw_logger_information))
 #define WL18XX_LOGGER_READ_POINT_OFFSET		(12)

 int wlcore_event_fw_logger(struct wl1271 *wl)
 {
 	int ret;
 	struct fw_logger_information fw_log;
 	u8  *buffer;
 	u32 internal_fw_addrbase = WL18XX_DATA_RAM_BASE_ADDRESS;
 	u32 addr = WL18XX_LOGGER_SDIO_BUFF_ADDR;
 	u32 addr_ptr;
 	u32 buff_start_ptr;
 	u32 buff_read_ptr;
 	u32 buff_end_ptr;
 	u32 available_len;
 	u32 actual_len;
 	u32 clear_ptr;
 	size_t len;
 	u32 start_loc;

 	buffer = kzalloc(WL18XX_LOGGER_SDIO_BUFF_MAX, GFP_KERNEL);
 	if (!buffer) {
 		wl1271_error("Fail to allocate fw logger memory");
 		actual_len = 0;
 		goto out;
 	}

 	ret = wlcore_read(wl, addr, buffer, WL18XX_LOGGER_SDIO_BUFF_MAX,
 			  false);
 	if (ret < 0) {
 		wl1271_error("Fail to read logger buffer, error_id = %d",
 			     ret);
 		actual_len = 0;
 		goto free_out;
 	}

 	memcpy(&fw_log, buffer, sizeof(fw_log));

 	actual_len = le32_to_cpu(fw_log.actual_buff_size);
 	if (actual_len == 0)
 		goto free_out;

 	/* Calculate the internal pointer to the fwlog structure */
 	addr_ptr = internal_fw_addrbase + addr;

 	/* Calculate the internal pointers to the start and end of log buffer */
 	buff_start_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET;
 	buff_end_ptr = buff_start_ptr + le32_to_cpu(fw_log.max_buff_size);

 	/* Read the read pointer and validate it */
 	buff_read_ptr = le32_to_cpu(fw_log.buff_read_ptr);
 	if (buff_read_ptr < buff_start_ptr ||
 	    buff_read_ptr >= buff_end_ptr) {
 		wl1271_error("buffer read pointer out of bounds: %x not in (%x-%x)\n",
 			     buff_read_ptr, buff_start_ptr, buff_end_ptr);
 		goto free_out;
 	}

 	start_loc = buff_read_ptr - addr_ptr;
 	available_len = buff_end_ptr - buff_read_ptr;

 	/* Copy initial part up to the end of ring buffer */
 	len = min(actual_len, available_len);
 	wl12xx_copy_fwlog(wl, &buffer[start_loc], len);
 	clear_ptr = addr_ptr + start_loc + len;
 	if (clear_ptr == buff_end_ptr)
 		clear_ptr = buff_start_ptr;

 	/* Copy any remaining part from beginning of ring buffer */
 	len = actual_len - len;
 	if (len) {
 		wl12xx_copy_fwlog(wl,
 				  &buffer[WL18XX_LOGGER_BUFF_OFFSET],
 				  len);
 		clear_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET + len;
 	}

 	/* Update the read pointer */
 	ret = wlcore_write32(wl, addr + WL18XX_LOGGER_READ_POINT_OFFSET,
 			     clear_ptr);
 free_out:
 	kfree(buffer);
 out:
 	return actual_len;
 }
 EXPORT_SYMBOL_GPL(wlcore_event_fw_logger);

 void wlcore_event_rssi_trigger(struct wl1271 *wl, s8 *metric_arr)
 {
 	struct wl12xx_vif *wlvif;
 	struct ieee80211_vif *vif;
 	enum nl80211_cqm_rssi_threshold_event event;
 	s8 metric = metric_arr[0];

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

 	/* TODO: check actual multi-role support */
 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
 		if (metric <= wlvif->rssi_thold)
 			event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
 		else
 			event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

 		vif = wl12xx_wlvif_to_vif(wlvif);
 		if (event != wlvif->last_rssi_event)
 			ieee80211_cqm_rssi_notify(vif, event, metric,
 						  GFP_KERNEL);
 		wlvif->last_rssi_event = event;
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);

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

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

 void wlcore_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);
 		}
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);

 void wlcore_event_sched_scan_completed(struct wl1271 *wl,
 				       u8 status)
 {
 	wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
 		     status);

 	if (wl->sched_vif) {
 		ieee80211_sched_scan_stopped(wl->hw);
 		wl->sched_vif = NULL;
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);

 void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
 				   unsigned long roles_bitmap,
 				   unsigned long allowed_bitmap)
 {
 	struct wl12xx_vif *wlvif;

 	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
 		     __func__, roles_bitmap, allowed_bitmap);

 	wl12xx_for_each_wlvif(wl, wlvif) {
 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 		    !test_bit(wlvif->role_id , &roles_bitmap))
 			continue;

 		wlvif->ba_allowed = !!test_bit(wlvif->role_id,
 					       &allowed_bitmap);
 		if (!wlvif->ba_allowed)
 			wl1271_stop_ba_event(wl, wlvif);
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);

 void wlcore_event_channel_switch(struct wl1271 *wl,
 				 unsigned long roles_bitmap,
 				 bool success)
 {
 	struct wl12xx_vif *wlvif;
 	struct ieee80211_vif *vif;

 	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
 		     __func__, roles_bitmap, success);

 	wl12xx_for_each_wlvif(wl, wlvif) {
 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 		    !test_bit(wlvif->role_id , &roles_bitmap))
 			continue;

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

 		vif = wl12xx_wlvif_to_vif(wlvif);

 		if (wlvif->bss_type == BSS_TYPE_STA_BSS) {
 			ieee80211_chswitch_done(vif, success, 0);
 			cancel_delayed_work(&wlvif->channel_switch_work);
 		} else {
 			set_bit(WLVIF_FLAG_BEACON_DISABLED, &wlvif->flags);
 			ieee80211_csa_finish(vif, 0);
 		}
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);

 void wlcore_event_dummy_packet(struct wl1271 *wl)
 {
 	if (wl->plt) {
 		wl1271_info("Got DUMMY_PACKET event in PLT mode.  FW bug, ignoring.");
 		return;
 	}

 	wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
 	wl1271_tx_dummy_packet(wl);
 }
 EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);

 static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 {
 	u32 num_packets = wl->conf.tx.max_tx_retries;
 	struct wl12xx_vif *wlvif;
 	struct ieee80211_vif *vif;
 	struct ieee80211_sta *sta;
 	const u8 *addr;
 	int h;

 	for_each_set_bit(h, &sta_bitmap, wl->num_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();
 	}
 }

 void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
 {
 	wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
 	wlcore_disconnect_sta(wl, sta_bitmap);
 }
 EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);

 void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
 {
 	wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
 	wlcore_disconnect_sta(wl, sta_bitmap);
 }
 EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);

 void wlcore_event_roc_complete(struct wl1271 *wl)
 {
 	wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
 	if (wl->roc_vif)
 		ieee80211_ready_on_channel(wl->hw);
 }
 EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);

 void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
 {
 	/*
 	 * We are HW_MONITOR device. On beacon loss - queue
 	 * connection loss work. Cancel it on REGAINED event.
 	 */
 	struct wl12xx_vif *wlvif;
 	struct ieee80211_vif *vif;
 	int delay = wl->conf.conn.synch_fail_thold *
 				wl->conf.conn.bss_lose_timeout;

 	wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);

 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
 		if (wlvif->role_id == WL12XX_INVALID_ROLE_ID ||
 		    !test_bit(wlvif->role_id , &roles_bitmap))
 			continue;

 		vif = wl12xx_wlvif_to_vif(wlvif);

 		/* don't attempt roaming in case of p2p */
 		if (wlvif->p2p) {
 			ieee80211_connection_loss(vif);
 			continue;
 		}

 		/*
 		 * if the work is already queued, it should take place.
 		 * We don't want to delay the connection loss
 		 * indication any more.
 		 */
 		ieee80211_queue_delayed_work(wl->hw,
 					     &wlvif->connection_loss_work,
 					     msecs_to_jiffies(delay));

 		ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
 	}
 }
 EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);

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

 	wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
 	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 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 */
 	ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
 			  wl->mbox_size, false);
 	if (ret < 0)
 		return ret;

 	/* process the descriptor */
 	ret = wl->ops->process_mailbox_events(wl);
 	if (ret < 0)
 		return ret;

 	/*
 	 * TODO: we just need this because one bit is in a different
 	 * place.  Is there any better way?
 	 */
 	ret = wl->ops->ack_event(wl);

 	return ret;
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* This file is part of wl1271
	*
	* Copyright (C) 2008-2009 Nokia Corporation
	*
	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	*/

	#include "wlcore.h"
	#include "debug.h"
	#include "io.h"
	#include "event.h"
	#include "ps.h"
	#include "scan.h"
	#include "wl12xx_80211.h"
	#include "hw_ops.h"

	#define WL18XX_LOGGER_SDIO_BUFF_MAX (0x1020)
	#define WL18XX_DATA_RAM_BASE_ADDRESS (0x20000000)
	#define WL18XX_LOGGER_SDIO_BUFF_ADDR (0x40159c)
	#define WL18XX_LOGGER_BUFF_OFFSET (sizeof(struct fw_logger_information))
	#define WL18XX_LOGGER_READ_POINT_OFFSET (12)

	int wlcore_event_fw_logger(struct wl1271 *wl)
	{
	int ret;
	struct fw_logger_information fw_log;
	u8 *buffer;
	u32 internal_fw_addrbase = WL18XX_DATA_RAM_BASE_ADDRESS;
	u32 addr = WL18XX_LOGGER_SDIO_BUFF_ADDR;
	u32 addr_ptr;
	u32 buff_start_ptr;
	u32 buff_read_ptr;
	u32 buff_end_ptr;
	u32 available_len;
	u32 actual_len;
	u32 clear_ptr;
	size_t len;
	u32 start_loc;

	buffer = kzalloc(WL18XX_LOGGER_SDIO_BUFF_MAX, GFP_KERNEL);
	if (!buffer) {
	wl1271_error("Fail to allocate fw logger memory");
	actual_len = 0;
	goto out;
	}

	ret = wlcore_read(wl, addr, buffer, WL18XX_LOGGER_SDIO_BUFF_MAX,
	false);
	if (ret < 0) {
	wl1271_error("Fail to read logger buffer, error_id = %d",
	ret);
	actual_len = 0;
	goto free_out;
	}

	memcpy(&fw_log, buffer, sizeof(fw_log));

	actual_len = le32_to_cpu(fw_log.actual_buff_size);
	if (actual_len == 0)
	goto free_out;

	/* Calculate the internal pointer to the fwlog structure */
	addr_ptr = internal_fw_addrbase + addr;

	/* Calculate the internal pointers to the start and end of log buffer */
	buff_start_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET;
	buff_end_ptr = buff_start_ptr + le32_to_cpu(fw_log.max_buff_size);

	/* Read the read pointer and validate it */
	buff_read_ptr = le32_to_cpu(fw_log.buff_read_ptr);
	if (buff_read_ptr < buff_start_ptr \|\|
	buff_read_ptr >= buff_end_ptr) {
	wl1271_error("buffer read pointer out of bounds: %x not in (%x-%x)\n",
	buff_read_ptr, buff_start_ptr, buff_end_ptr);
	goto free_out;
	}

	start_loc = buff_read_ptr - addr_ptr;
	available_len = buff_end_ptr - buff_read_ptr;

	/* Copy initial part up to the end of ring buffer */
	len = min(actual_len, available_len);
	wl12xx_copy_fwlog(wl, &buffer[start_loc], len);
	clear_ptr = addr_ptr + start_loc + len;
	if (clear_ptr == buff_end_ptr)
	clear_ptr = buff_start_ptr;

	/* Copy any remaining part from beginning of ring buffer */
	len = actual_len - len;
	if (len) {
	wl12xx_copy_fwlog(wl,
	&buffer[WL18XX_LOGGER_BUFF_OFFSET],
	len);
	clear_ptr = addr_ptr + WL18XX_LOGGER_BUFF_OFFSET + len;
	}

	/* Update the read pointer */
	ret = wlcore_write32(wl, addr + WL18XX_LOGGER_READ_POINT_OFFSET,
	clear_ptr);
	free_out:
	kfree(buffer);
	out:
	return actual_len;
	}
	EXPORT_SYMBOL_GPL(wlcore_event_fw_logger);

	void wlcore_event_rssi_trigger(struct wl1271 wl, s8 metric_arr)
	{
	struct wl12xx_vif *wlvif;
	struct ieee80211_vif *vif;
	enum nl80211_cqm_rssi_threshold_event event;
	s8 metric = metric_arr[0];

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

	/* TODO: check actual multi-role support */
	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	if (metric <= wlvif->rssi_thold)
	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
	else
	event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;

	vif = wl12xx_wlvif_to_vif(wlvif);
	if (event != wlvif->last_rssi_event)
	ieee80211_cqm_rssi_notify(vif, event, metric,
	GFP_KERNEL);
	wlvif->last_rssi_event = event;
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_rssi_trigger);

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

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

	void wlcore_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);
	}
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_soft_gemini_sense);

	void wlcore_event_sched_scan_completed(struct wl1271 *wl,
	u8 status)
	{
	wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT (status 0x%0x)",
	status);

	if (wl->sched_vif) {
	ieee80211_sched_scan_stopped(wl->hw);
	wl->sched_vif = NULL;
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_sched_scan_completed);

	void wlcore_event_ba_rx_constraint(struct wl1271 *wl,
	unsigned long roles_bitmap,
	unsigned long allowed_bitmap)
	{
	struct wl12xx_vif *wlvif;

	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx allowed=0x%lx",
	__func__, roles_bitmap, allowed_bitmap);

	wl12xx_for_each_wlvif(wl, wlvif) {
	if (wlvif->role_id == WL12XX_INVALID_ROLE_ID \|\|
	!test_bit(wlvif->role_id , &roles_bitmap))
	continue;

	wlvif->ba_allowed = !!test_bit(wlvif->role_id,
	&allowed_bitmap);
	if (!wlvif->ba_allowed)
	wl1271_stop_ba_event(wl, wlvif);
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_ba_rx_constraint);

	void wlcore_event_channel_switch(struct wl1271 *wl,
	unsigned long roles_bitmap,
	bool success)
	{
	struct wl12xx_vif *wlvif;
	struct ieee80211_vif *vif;

	wl1271_debug(DEBUG_EVENT, "%s: roles=0x%lx success=%d",
	__func__, roles_bitmap, success);

	wl12xx_for_each_wlvif(wl, wlvif) {
	if (wlvif->role_id == WL12XX_INVALID_ROLE_ID \|\|
	!test_bit(wlvif->role_id , &roles_bitmap))
	continue;

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

	vif = wl12xx_wlvif_to_vif(wlvif);

	if (wlvif->bss_type == BSS_TYPE_STA_BSS) {
	ieee80211_chswitch_done(vif, success, 0);
	cancel_delayed_work(&wlvif->channel_switch_work);
	} else {
	set_bit(WLVIF_FLAG_BEACON_DISABLED, &wlvif->flags);
	ieee80211_csa_finish(vif, 0);
	}
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_channel_switch);

	void wlcore_event_dummy_packet(struct wl1271 *wl)
	{
	if (wl->plt) {
	wl1271_info("Got DUMMY_PACKET event in PLT mode. FW bug, ignoring.");
	return;
	}

	wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
	wl1271_tx_dummy_packet(wl);
	}
	EXPORT_SYMBOL_GPL(wlcore_event_dummy_packet);

	static void wlcore_disconnect_sta(struct wl1271 *wl, unsigned long sta_bitmap)
	{
	u32 num_packets = wl->conf.tx.max_tx_retries;
	struct wl12xx_vif *wlvif;
	struct ieee80211_vif *vif;
	struct ieee80211_sta *sta;
	const u8 *addr;
	int h;

	for_each_set_bit(h, &sta_bitmap, wl->num_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();
	}
	}

	void wlcore_event_max_tx_failure(struct wl1271 *wl, unsigned long sta_bitmap)
	{
	wl1271_debug(DEBUG_EVENT, "MAX_TX_FAILURE_EVENT_ID");
	wlcore_disconnect_sta(wl, sta_bitmap);
	}
	EXPORT_SYMBOL_GPL(wlcore_event_max_tx_failure);

	void wlcore_event_inactive_sta(struct wl1271 *wl, unsigned long sta_bitmap)
	{
	wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
	wlcore_disconnect_sta(wl, sta_bitmap);
	}
	EXPORT_SYMBOL_GPL(wlcore_event_inactive_sta);

	void wlcore_event_roc_complete(struct wl1271 *wl)
	{
	wl1271_debug(DEBUG_EVENT, "REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID");
	if (wl->roc_vif)
	ieee80211_ready_on_channel(wl->hw);
	}
	EXPORT_SYMBOL_GPL(wlcore_event_roc_complete);

	void wlcore_event_beacon_loss(struct wl1271 *wl, unsigned long roles_bitmap)
	{
	/*
	* We are HW_MONITOR device. On beacon loss - queue
	* connection loss work. Cancel it on REGAINED event.
	*/
	struct wl12xx_vif *wlvif;
	struct ieee80211_vif *vif;
	int delay = wl->conf.conn.synch_fail_thold *
	wl->conf.conn.bss_lose_timeout;

	wl1271_info("Beacon loss detected. roles:0x%lx", roles_bitmap);

	wl12xx_for_each_wlvif_sta(wl, wlvif) {
	if (wlvif->role_id == WL12XX_INVALID_ROLE_ID \|\|
	!test_bit(wlvif->role_id , &roles_bitmap))
	continue;

	vif = wl12xx_wlvif_to_vif(wlvif);

	/* don't attempt roaming in case of p2p */
	if (wlvif->p2p) {
	ieee80211_connection_loss(vif);
	continue;
	}

	/*
	* if the work is already queued, it should take place.
	* We don't want to delay the connection loss
	* indication any more.
	*/
	ieee80211_queue_delayed_work(wl->hw,
	&wlvif->connection_loss_work,
	msecs_to_jiffies(delay));

	ieee80211_cqm_beacon_loss_notify(vif, GFP_KERNEL);
	}
	}
	EXPORT_SYMBOL_GPL(wlcore_event_beacon_loss);

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

	wl1271_debug(DEBUG_EVENT, "unmasking event_mask 0x%x", wl->event_mask);
	ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
	if (ret < 0)
	return ret;

	return 0;
	}

	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 */
	ret = wlcore_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
	wl->mbox_size, false);
	if (ret < 0)
	return ret;

	/* process the descriptor */
	ret = wl->ops->process_mailbox_events(wl);
	if (ret < 0)
	return ret;

	/*
	* TODO: we just need this because one bit is in a different
	* place. Is there any better way?
	*/
	ret = wl->ops->ack_event(wl);

	return ret;
	}