drivers/net/wireless/mwifiex/uap_event.c - linux - Git at Google

 /*
  * Marvell Wireless LAN device driver: AP event handling
  *
  * Copyright (C) 2012, Marvell International Ltd.
  *
  * This software file (the "File") is distributed by Marvell International
  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  * (the "License").  You may use, redistribute and/or modify this File in
  * accordance with the terms and conditions of the License, a copy of which
  * is available by writing to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  *
  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  * this warranty disclaimer.
  */

 #include "decl.h"
 #include "main.h"
 #include "11n.h"

 /*
  * This function will return the pointer to station entry in station list
  * table which matches specified mac address.
  * This function should be called after acquiring RA list spinlock.
  * NULL is returned if station entry is not found in associated STA list.
  */
 struct mwifiex_sta_node *
 mwifiex_get_sta_entry(struct mwifiex_private *priv, u8 *mac)
 {
 	struct mwifiex_sta_node *node;

 	if (!mac)
 		return NULL;

 	list_for_each_entry(node, &priv->sta_list, list) {
 		if (!memcmp(node->mac_addr, mac, ETH_ALEN))
 			return node;
 	}

 	return NULL;
 }

 /*
  * This function will add a sta_node entry to associated station list
  * table with the given mac address.
  * If entry exist already, existing entry is returned.
  * If received mac address is NULL, NULL is returned.
  */
 static struct mwifiex_sta_node *
 mwifiex_add_sta_entry(struct mwifiex_private *priv, u8 *mac)
 {
 	struct mwifiex_sta_node *node;
 	unsigned long flags;

 	if (!mac)
 		return NULL;

 	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 	node = mwifiex_get_sta_entry(priv, mac);
 	if (node)
 		goto done;

 	node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC);
 	if (!node)
 		goto done;

 	memcpy(node->mac_addr, mac, ETH_ALEN);
 	list_add_tail(&node->list, &priv->sta_list);

 done:
 	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 	return node;
 }

 /*
  * This function will search for HT IE in association request IEs
  * and set station HT parameters accordingly.
  */
 static void
 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
 		       int ies_len, struct mwifiex_sta_node *node)
 {
 	const struct ieee80211_ht_cap *ht_cap;

 	if (!ies)
 		return;

 	ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
 	if (ht_cap) {
 		node->is_11n_enabled = 1;
 		node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
 				  IEEE80211_HT_CAP_MAX_AMSDU ?
 				  MWIFIEX_TX_DATA_BUF_SIZE_8K :
 				  MWIFIEX_TX_DATA_BUF_SIZE_4K;
 	} else {
 		node->is_11n_enabled = 0;
 	}

 	return;
 }

 /*
  * This function will delete a station entry from station list
  */
 static void mwifiex_del_sta_entry(struct mwifiex_private *priv, u8 *mac)
 {
 	struct mwifiex_sta_node *node;
 	unsigned long flags;

 	spin_lock_irqsave(&priv->sta_list_spinlock, flags);

 	node = mwifiex_get_sta_entry(priv, mac);
 	if (node) {
 		list_del(&node->list);
 		kfree(node);
 	}

 	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 	return;
 }

 /*
  * This function will delete all stations from associated station list.
  */
 static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
 {
 	struct mwifiex_sta_node *node, *tmp;
 	unsigned long flags;

 	spin_lock_irqsave(&priv->sta_list_spinlock, flags);

 	list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
 		list_del(&node->list);
 		kfree(node);
 	}

 	INIT_LIST_HEAD(&priv->sta_list);
 	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 	return;
 }

 /*
  * This function handles AP interface specific events generated by firmware.
  *
  * Event specific routines are called by this function based
  * upon the generated event cause.
  *
  *
  * Events supported for AP -
  *      - EVENT_UAP_STA_ASSOC
  *      - EVENT_UAP_STA_DEAUTH
  *      - EVENT_UAP_BSS_ACTIVE
  *      - EVENT_UAP_BSS_START
  *      - EVENT_UAP_BSS_IDLE
  *      - EVENT_UAP_MIC_COUNTERMEASURES:
  */
 int mwifiex_process_uap_event(struct mwifiex_private *priv)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	int len, i;
 	u32 eventcause = adapter->event_cause;
 	struct station_info sinfo;
 	struct mwifiex_assoc_event *event;
 	struct mwifiex_sta_node *node;
 	u8 *deauth_mac;
 	struct host_cmd_ds_11n_batimeout *ba_timeout;
 	u16 ctrl;

 	switch (eventcause) {
 	case EVENT_UAP_STA_ASSOC:
 		memset(&sinfo, 0, sizeof(sinfo));
 		event = (struct mwifiex_assoc_event *)
 			(adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
 		if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
 			len = -1;

 			if (ieee80211_is_assoc_req(event->frame_control))
 				len = 0;
 			else if (ieee80211_is_reassoc_req(event->frame_control))
 				/* There will be ETH_ALEN bytes of
 				 * current_ap_addr before the re-assoc ies.
 				 */
 				len = ETH_ALEN;

 			if (len != -1) {
 				sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
 				sinfo.assoc_req_ies = &event->data[len];
 				len = (u8 *)sinfo.assoc_req_ies -
 				      (u8 *)&event->frame_control;
 				sinfo.assoc_req_ies_len =
 					le16_to_cpu(event->len) - (u16)len;
 			}
 		}
 		cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
 				 GFP_KERNEL);

 		node = mwifiex_add_sta_entry(priv, event->sta_addr);
 		if (!node) {
 			dev_warn(adapter->dev,
 				 "could not create station entry!\n");
 			return -1;
 		}

 		if (!priv->ap_11n_enabled)
 			break;

 		mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
 				       sinfo.assoc_req_ies_len, node);

 		for (i = 0; i < MAX_NUM_TID; i++) {
 			if (node->is_11n_enabled)
 				node->ampdu_sta[i] =
 					      priv->aggr_prio_tbl[i].ampdu_user;
 			else
 				node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
 		}
 		memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
 		break;
 	case EVENT_UAP_STA_DEAUTH:
 		deauth_mac = adapter->event_body +
 			     MWIFIEX_UAP_EVENT_EXTRA_HEADER;
 		cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);

 		if (priv->ap_11n_enabled) {
 			mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
 			mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
 		}
 		mwifiex_del_sta_entry(priv, deauth_mac);
 		break;
 	case EVENT_UAP_BSS_IDLE:
 		priv->media_connected = false;
 		if (netif_carrier_ok(priv->netdev))
 			netif_carrier_off(priv->netdev);
 		mwifiex_stop_net_dev_queue(priv->netdev, adapter);

 		mwifiex_clean_txrx(priv);
 		mwifiex_del_all_sta_list(priv);
 		break;
 	case EVENT_UAP_BSS_ACTIVE:
 		priv->media_connected = true;
 		if (!netif_carrier_ok(priv->netdev))
 			netif_carrier_on(priv->netdev);
 		mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 		break;
 	case EVENT_UAP_BSS_START:
 		dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 		memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
 		       ETH_ALEN);
 		break;
 	case EVENT_UAP_MIC_COUNTERMEASURES:
 		/* For future development */
 		dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
 		break;
 	case EVENT_AMSDU_AGGR_CTRL:
 		ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 		dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);

 		if (priv->media_connected) {
 			adapter->tx_buf_size =
 				min_t(u16, adapter->curr_tx_buf_size, ctrl);
 			dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 				adapter->tx_buf_size);
 		}
 		break;
 	case EVENT_ADDBA:
 		dev_dbg(adapter->dev, "event: ADDBA Request\n");
 		if (priv->media_connected)
 			mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
 					       HostCmd_ACT_GEN_SET, 0,
 					       adapter->event_body);
 		break;
 	case EVENT_DELBA:
 		dev_dbg(adapter->dev, "event: DELBA Request\n");
 		if (priv->media_connected)
 			mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 		break;
 	case EVENT_BA_STREAM_TIEMOUT:
 		dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 		if (priv->media_connected) {
 			ba_timeout = (void *)adapter->event_body;
 			mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
 		}
 		break;
 	default:
 		dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 			eventcause);
 		break;
 	}

 	return 0;
 }

 /* This function deletes station entry from associated station list.
  * Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
  * tables created for this station are deleted.
  */
 void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
 			      struct mwifiex_sta_node *node)
 {
 	if (priv->ap_11n_enabled && node->is_11n_enabled) {
 		mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
 		mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
 	}
 	mwifiex_del_sta_entry(priv, node->mac_addr);

 	return;
 }
	/*
	* Marvell Wireless LAN device driver: AP event handling
	*
	* Copyright (C) 2012, Marvell International Ltd.
	*
	* This software file (the "File") is distributed by Marvell International
	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	* (the "License"). You may use, redistribute and/or modify this File in
	* accordance with the terms and conditions of the License, a copy of which
	* is available by writing to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	*
	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	* this warranty disclaimer.
	*/

	#include "decl.h"
	#include "main.h"
	#include "11n.h"

	/*
	* This function will return the pointer to station entry in station list
	* table which matches specified mac address.
	* This function should be called after acquiring RA list spinlock.
	* NULL is returned if station entry is not found in associated STA list.
	*/
	struct mwifiex_sta_node *
	mwifiex_get_sta_entry(struct mwifiex_private priv, u8 mac)
	{
	struct mwifiex_sta_node *node;

	if (!mac)
	return NULL;

	list_for_each_entry(node, &priv->sta_list, list) {
	if (!memcmp(node->mac_addr, mac, ETH_ALEN))
	return node;
	}

	return NULL;
	}

	/*
	* This function will add a sta_node entry to associated station list
	* table with the given mac address.
	* If entry exist already, existing entry is returned.
	* If received mac address is NULL, NULL is returned.
	*/
	static struct mwifiex_sta_node *
	mwifiex_add_sta_entry(struct mwifiex_private priv, u8 mac)
	{
	struct mwifiex_sta_node *node;
	unsigned long flags;

	if (!mac)
	return NULL;

	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
	node = mwifiex_get_sta_entry(priv, mac);
	if (node)
	goto done;

	node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_ATOMIC);
	if (!node)
	goto done;

	memcpy(node->mac_addr, mac, ETH_ALEN);
	list_add_tail(&node->list, &priv->sta_list);

	done:
	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
	return node;
	}

	/*
	* This function will search for HT IE in association request IEs
	* and set station HT parameters accordingly.
	*/
	static void
	mwifiex_set_sta_ht_cap(struct mwifiex_private priv, const u8 ies,
	int ies_len, struct mwifiex_sta_node *node)
	{
	const struct ieee80211_ht_cap *ht_cap;

	if (!ies)
	return;

	ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
	if (ht_cap) {
	node->is_11n_enabled = 1;
	node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
	IEEE80211_HT_CAP_MAX_AMSDU ?
	MWIFIEX_TX_DATA_BUF_SIZE_8K :
	MWIFIEX_TX_DATA_BUF_SIZE_4K;
	} else {
	node->is_11n_enabled = 0;
	}

	return;
	}

	/*
	* This function will delete a station entry from station list
	*/
	static void mwifiex_del_sta_entry(struct mwifiex_private priv, u8 mac)
	{
	struct mwifiex_sta_node *node;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_list_spinlock, flags);

	node = mwifiex_get_sta_entry(priv, mac);
	if (node) {
	list_del(&node->list);
	kfree(node);
	}

	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
	return;
	}

	/*
	* This function will delete all stations from associated station list.
	*/
	static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
	{
	struct mwifiex_sta_node node, tmp;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_list_spinlock, flags);

	list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
	list_del(&node->list);
	kfree(node);
	}

	INIT_LIST_HEAD(&priv->sta_list);
	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
	return;
	}

	/*
	* This function handles AP interface specific events generated by firmware.
	*
	* Event specific routines are called by this function based
	* upon the generated event cause.
	*
	*
	* Events supported for AP -
	* - EVENT_UAP_STA_ASSOC
	* - EVENT_UAP_STA_DEAUTH
	* - EVENT_UAP_BSS_ACTIVE
	* - EVENT_UAP_BSS_START
	* - EVENT_UAP_BSS_IDLE
	* - EVENT_UAP_MIC_COUNTERMEASURES:
	*/
	int mwifiex_process_uap_event(struct mwifiex_private *priv)
	{
	struct mwifiex_adapter *adapter = priv->adapter;
	int len, i;
	u32 eventcause = adapter->event_cause;
	struct station_info sinfo;
	struct mwifiex_assoc_event *event;
	struct mwifiex_sta_node *node;
	u8 *deauth_mac;
	struct host_cmd_ds_11n_batimeout *ba_timeout;
	u16 ctrl;

	switch (eventcause) {
	case EVENT_UAP_STA_ASSOC:
	memset(&sinfo, 0, sizeof(sinfo));
	event = (struct mwifiex_assoc_event *)
	(adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
	if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
	len = -1;

	if (ieee80211_is_assoc_req(event->frame_control))
	len = 0;
	else if (ieee80211_is_reassoc_req(event->frame_control))
	/* There will be ETH_ALEN bytes of
	* current_ap_addr before the re-assoc ies.
	*/
	len = ETH_ALEN;

	if (len != -1) {
	sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
	sinfo.assoc_req_ies = &event->data[len];
	len = (u8 *)sinfo.assoc_req_ies -
	(u8 *)&event->frame_control;
	sinfo.assoc_req_ies_len =
	le16_to_cpu(event->len) - (u16)len;
	}
	}
	cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
	GFP_KERNEL);

	node = mwifiex_add_sta_entry(priv, event->sta_addr);
	if (!node) {
	dev_warn(adapter->dev,
	"could not create station entry!\n");
	return -1;
	}

	if (!priv->ap_11n_enabled)
	break;

	mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
	sinfo.assoc_req_ies_len, node);

	for (i = 0; i < MAX_NUM_TID; i++) {
	if (node->is_11n_enabled)
	node->ampdu_sta[i] =
	priv->aggr_prio_tbl[i].ampdu_user;
	else
	node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
	}
	memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
	break;
	case EVENT_UAP_STA_DEAUTH:
	deauth_mac = adapter->event_body +
	MWIFIEX_UAP_EVENT_EXTRA_HEADER;
	cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);

	if (priv->ap_11n_enabled) {
	mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, deauth_mac);
	mwifiex_del_tx_ba_stream_tbl_by_ra(priv, deauth_mac);
	}
	mwifiex_del_sta_entry(priv, deauth_mac);
	break;
	case EVENT_UAP_BSS_IDLE:
	priv->media_connected = false;
	if (netif_carrier_ok(priv->netdev))
	netif_carrier_off(priv->netdev);
	mwifiex_stop_net_dev_queue(priv->netdev, adapter);

	mwifiex_clean_txrx(priv);
	mwifiex_del_all_sta_list(priv);
	break;
	case EVENT_UAP_BSS_ACTIVE:
	priv->media_connected = true;
	if (!netif_carrier_ok(priv->netdev))
	netif_carrier_on(priv->netdev);
	mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
	break;
	case EVENT_UAP_BSS_START:
	dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
	memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
	ETH_ALEN);
	break;
	case EVENT_UAP_MIC_COUNTERMEASURES:
	/* For future development */
	dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
	break;
	case EVENT_AMSDU_AGGR_CTRL:
	ctrl = le16_to_cpu((__le16 )adapter->event_body);
	dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);

	if (priv->media_connected) {
	adapter->tx_buf_size =
	min_t(u16, adapter->curr_tx_buf_size, ctrl);
	dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
	adapter->tx_buf_size);
	}
	break;
	case EVENT_ADDBA:
	dev_dbg(adapter->dev, "event: ADDBA Request\n");
	if (priv->media_connected)
	mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_RSP,
	HostCmd_ACT_GEN_SET, 0,
	adapter->event_body);
	break;
	case EVENT_DELBA:
	dev_dbg(adapter->dev, "event: DELBA Request\n");
	if (priv->media_connected)
	mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
	break;
	case EVENT_BA_STREAM_TIEMOUT:
	dev_dbg(adapter->dev, "event: BA Stream timeout\n");
	if (priv->media_connected) {
	ba_timeout = (void *)adapter->event_body;
	mwifiex_11n_ba_stream_timeout(priv, ba_timeout);
	}
	break;
	default:
	dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
	eventcause);
	break;
	}

	return 0;
	}

	/* This function deletes station entry from associated station list.
	* Also if both AP and STA are 11n enabled, RxReorder tables and TxBA stream
	* tables created for this station are deleted.
	*/
	void mwifiex_uap_del_sta_data(struct mwifiex_private *priv,
	struct mwifiex_sta_node *node)
	{
	if (priv->ap_11n_enabled && node->is_11n_enabled) {
	mwifiex_11n_del_rx_reorder_tbl_by_ta(priv, node->mac_addr);
	mwifiex_del_tx_ba_stream_tbl_by_ra(priv, node->mac_addr);
	}
	mwifiex_del_sta_entry(priv, node->mac_addr);

	return;
	}