[deliverable/linux.git] / drivers / net / wireless / mwifiex / uap_event.c

/*
 * 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"

/*
 * 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_KERNEL);
	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, *tmp;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_list_spinlock, flags);

	node = mwifiex_get_sta_entry(priv, mac);
	if (node) {
		list_for_each_entry_safe(node, tmp, &priv->sta_list,
					 list) {
			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;

	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);

		mwifiex_del_sta_entry(priv, deauth_mac);
		break;
	case EVENT_UAP_BSS_IDLE:
		priv->media_connected = false;
		mwifiex_del_all_sta_list(priv);
		break;
	case EVENT_UAP_BSS_ACTIVE:
		priv->media_connected = true;
		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:
		dev_dbg(adapter->dev, "event:  AMSDU_AGGR_CTRL %d\n",
			*(u16 *)adapter->event_body);

		if (priv->media_connected) {
			adapter->tx_buf_size =
			       min(adapter->curr_tx_buf_size,
				   le16_to_cpu(*(__le16 *)adapter->event_body));

			dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
				adapter->tx_buf_size);
		}
		break;
	default:
		dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
			eventcause);
		break;
	}

	return 0;
}
Commit	Line	Data
3d99d987 AP	1	/*
	2	* Marvell Wireless LAN device driver: AP event handling
	3	*
	4	* Copyright (C) 2012, Marvell International Ltd.
	5	*
	6	* This software file (the "File") is distributed by Marvell International
	7	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	8	* (the "License"). You may use, redistribute and/or modify this File in
	9	* accordance with the terms and conditions of the License, a copy of which
	10	* is available by writing to the Free Software Foundation, Inc.,
	11	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	12	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	13	*
	14	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	16	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	17	* this warranty disclaimer.
	18	*/
	19
	20	#include "decl.h"
	21	#include "main.h"
	22
017a92a1 AP	23	/*
	24	* This function will return the pointer to station entry in station list
	25	* table which matches specified mac address.
	26	* This function should be called after acquiring RA list spinlock.
	27	* NULL is returned if station entry is not found in associated STA list.
	28	*/
	29	struct mwifiex_sta_node *
	30	mwifiex_get_sta_entry(struct mwifiex_private priv, u8 mac)
	31	{
	32	struct mwifiex_sta_node *node;
	33
	34	if (!mac)
	35	return NULL;
	36
	37	list_for_each_entry(node, &priv->sta_list, list) {
	38	if (!memcmp(node->mac_addr, mac, ETH_ALEN))
	39	return node;
	40	}
	41
	42	return NULL;
	43	}
	44
	45	/*
	46	* This function will add a sta_node entry to associated station list
	47	* table with the given mac address.
	48	* If entry exist already, existing entry is returned.
	49	* If received mac address is NULL, NULL is returned.
	50	*/
	51	static struct mwifiex_sta_node *
	52	mwifiex_add_sta_entry(struct mwifiex_private priv, u8 mac)
	53	{
	54	struct mwifiex_sta_node *node;
	55	unsigned long flags;
	56
	57	if (!mac)
	58	return NULL;
	59
	60	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
	61	node = mwifiex_get_sta_entry(priv, mac);
	62	if (node)
	63	goto done;
	64
	65	node = kzalloc(sizeof(struct mwifiex_sta_node), GFP_KERNEL);
	66	if (!node)
	67	goto done;
	68
	69	memcpy(node->mac_addr, mac, ETH_ALEN);
	70	list_add_tail(&node->list, &priv->sta_list);
	71
	72	done:
	73	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
	74	return node;
	75	}
	76
	77	/*
	78	* This function will search for HT IE in association request IEs
	79	* and set station HT parameters accordingly.
	80	*/
	81	static void
	82	mwifiex_set_sta_ht_cap(struct mwifiex_private priv, const u8 ies,
	83	int ies_len, struct mwifiex_sta_node *node)
	84	{
	85	const struct ieee80211_ht_cap *ht_cap;
	86
87	if (!ies)
88	return;
89
90	ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
91	if (ht_cap) {
92	node->is_11n_enabled = 1;
93	node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
94	IEEE80211_HT_CAP_MAX_AMSDU ?
95	MWIFIEX_TX_DATA_BUF_SIZE_8K :
96	MWIFIEX_TX_DATA_BUF_SIZE_4K;
97	} else {
98	node->is_11n_enabled = 0;
99	}
100
101	return;
102	}
103
104	/*
105	* This function will delete a station entry from station list
106	*/
107	static void mwifiex_del_sta_entry(struct mwifiex_private priv, u8 mac)
108	{
109	struct mwifiex_sta_node node, tmp;
110	unsigned long flags;
111
112	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
113
114	node = mwifiex_get_sta_entry(priv, mac);
115	if (node) {
116	list_for_each_entry_safe(node, tmp, &priv->sta_list,
117	list) {
118	list_del(&node->list);
119	kfree(node);
120	}
121	}
122
123	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
124	return;
125	}
126
127	/*
128	* This function will delete all stations from associated station list.
129	*/
130	static void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
131	{
132	struct mwifiex_sta_node node, tmp;
133	unsigned long flags;
134
135	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
136
137	list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
138	list_del(&node->list);
139	kfree(node);
140	}
141
142	INIT_LIST_HEAD(&priv->sta_list);
143	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
144	return;
145	}
146
3d99d987 AP	147	/*
	148	* This function handles AP interface specific events generated by firmware.
	149	*
	150	* Event specific routines are called by this function based
	151	* upon the generated event cause.
	152	*
	153	*
	154	* Events supported for AP -
	155	* - EVENT_UAP_STA_ASSOC
	156	* - EVENT_UAP_STA_DEAUTH
	157	* - EVENT_UAP_BSS_ACTIVE
	158	* - EVENT_UAP_BSS_START
	159	* - EVENT_UAP_BSS_IDLE
	160	* - EVENT_UAP_MIC_COUNTERMEASURES:
	161	*/
	162	int mwifiex_process_uap_event(struct mwifiex_private *priv)
	163	{
	164	struct mwifiex_adapter *adapter = priv->adapter;
017a92a1	165	int len, i;
3d99d987 AP	166	u32 eventcause = adapter->event_cause;
	167	struct station_info sinfo;
	168	struct mwifiex_assoc_event *event;
017a92a1 AP	169	struct mwifiex_sta_node *node;
017a92a1 AP	170	u8 *deauth_mac;
3d99d987 AP	171
	172	switch (eventcause) {
	173	case EVENT_UAP_STA_ASSOC:
	174	memset(&sinfo, 0, sizeof(sinfo));
	175	event = (struct mwifiex_assoc_event *)
	176	(adapter->event_body + MWIFIEX_UAP_EVENT_EXTRA_HEADER);
	177	if (le16_to_cpu(event->type) == TLV_TYPE_UAP_MGMT_FRAME) {
	178	len = -1;
	179
	180	if (ieee80211_is_assoc_req(event->frame_control))
	181	len = 0;
	182	else if (ieee80211_is_reassoc_req(event->frame_control))
	183	/* There will be ETH_ALEN bytes of
	184	* current_ap_addr before the re-assoc ies.
	185	*/
	186	len = ETH_ALEN;
	187
	188	if (len != -1) {
	189	sinfo.filled = STATION_INFO_ASSOC_REQ_IES;
	190	sinfo.assoc_req_ies = &event->data[len];
	191	len = (u8 *)sinfo.assoc_req_ies -
	192	(u8 *)&event->frame_control;
	193	sinfo.assoc_req_ies_len =
	194	le16_to_cpu(event->len) - (u16)len;
	195	}
	196	}
	197	cfg80211_new_sta(priv->netdev, event->sta_addr, &sinfo,
	198	GFP_KERNEL);
017a92a1 AP	199
	200	node = mwifiex_add_sta_entry(priv, event->sta_addr);
	201	if (!node) {
	202	dev_warn(adapter->dev,
	203	"could not create station entry!\n");
	204	return -1;
	205	}
	206
	207	if (!priv->ap_11n_enabled)
	208	break;
	209
	210	mwifiex_set_sta_ht_cap(priv, sinfo.assoc_req_ies,
	211	sinfo.assoc_req_ies_len, node);
	212
	213	for (i = 0; i < MAX_NUM_TID; i++) {
	214	if (node->is_11n_enabled)
	215	node->ampdu_sta[i] =
	216	priv->aggr_prio_tbl[i].ampdu_user;
	217	else
	218	node->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
	219	}
	220	memset(node->rx_seq, 0xff, sizeof(node->rx_seq));
3d99d987 AP	221	break;
3d99d987 AP	222	case EVENT_UAP_STA_DEAUTH:
017a92a1 AP	223	deauth_mac = adapter->event_body +
	224	MWIFIEX_UAP_EVENT_EXTRA_HEADER;
	225	cfg80211_del_sta(priv->netdev, deauth_mac, GFP_KERNEL);
	226
	227	mwifiex_del_sta_entry(priv, deauth_mac);
3d99d987 AP	228	break;
	229	case EVENT_UAP_BSS_IDLE:
	230	priv->media_connected = false;
017a92a1	231	mwifiex_del_all_sta_list(priv);
3d99d987 AP	232	break;
	233	case EVENT_UAP_BSS_ACTIVE:
	234	priv->media_connected = true;
	235	break;
	236	case EVENT_UAP_BSS_START:
	237	dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
	238	memcpy(priv->netdev->dev_addr, adapter->event_body + 2,
	239	ETH_ALEN);
	240	break;
	241	case EVENT_UAP_MIC_COUNTERMEASURES:
	242	/* For future development */
	243	dev_dbg(adapter->dev, "AP EVENT: event id: %#x\n", eventcause);
	244	break;
d1cf3b95 AP	245	case EVENT_AMSDU_AGGR_CTRL:
	246	dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n",
	247	(u16 )adapter->event_body);
	248
	249	if (priv->media_connected) {
	250	adapter->tx_buf_size =
	251	min(adapter->curr_tx_buf_size,
	252	le16_to_cpu((__le16 )adapter->event_body));
	253
	254	dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
	255	adapter->tx_buf_size);
	256	}
	257	break;
3d99d987 AP	258	default:
	259	dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
	260	eventcause);
	261	break;
	262	}
	263
	264	return 0;
	265	}