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1/******************************************************************************
2 * rtl871x_sta_mgt.c
3 *
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
22 *
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
26 *
27 ******************************************************************************/
28
29#define _RTL871X_STA_MGT_C_
30
31#include "osdep_service.h"
32#include "drv_types.h"
33#include "recv_osdep.h"
34#include "xmit_osdep.h"
35#include "sta_info.h"
36
37static void _init_stainfo(struct sta_info *psta)
38{
39	memset((u8 *)psta, 0, sizeof(struct sta_info));
40	 spin_lock_init(&psta->lock);
41	INIT_LIST_HEAD(&psta->list);
42	INIT_LIST_HEAD(&psta->hash_list);
43	_r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
44	_r8712_init_sta_recv_priv(&psta->sta_recvpriv);
45	INIT_LIST_HEAD(&psta->asoc_list);
46	INIT_LIST_HEAD(&psta->auth_list);
47}
48
49u32 _r8712_init_sta_priv(struct	sta_priv *pstapriv)
50{
51	struct sta_info *psta;
52	s32 i;
53
54	pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) *
55						   NUM_STA + 4, GFP_ATOMIC);
56	if (pstapriv->pallocated_stainfo_buf == NULL)
57		return _FAIL;
58	pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
59		((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
60	_init_queue(&pstapriv->free_sta_queue);
61	spin_lock_init(&pstapriv->sta_hash_lock);
62	pstapriv->asoc_sta_count = 0;
63	_init_queue(&pstapriv->sleep_q);
64	_init_queue(&pstapriv->wakeup_q);
65	psta = (struct sta_info *)(pstapriv->pstainfo_buf);
66	for (i = 0; i < NUM_STA; i++) {
67		_init_stainfo(psta);
68		INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
69		list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue);
70		psta++;
71	}
72	INIT_LIST_HEAD(&pstapriv->asoc_list);
73	INIT_LIST_HEAD(&pstapriv->auth_list);
74	return _SUCCESS;
75}
76
77/* this function is used to free the memory of lock || sema for all stainfos */
78static void mfree_all_stainfo(struct sta_priv *pstapriv)
79{
80	unsigned long irqL;
81	struct list_head *plist, *phead;
82	struct sta_info *psta = NULL;
83
84	spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
85	phead = &pstapriv->free_sta_queue.queue;
86	plist = phead->next;
87	while ((end_of_queue_search(phead, plist)) == false) {
88		psta = LIST_CONTAINOR(plist, struct sta_info, list);
89		plist = plist->next;
90	}
91
92	spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
93}
94
95
96static void mfree_sta_priv_lock(struct	sta_priv *pstapriv)
97{
98	 mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
99}
100
101u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
102{
103	if (pstapriv) {
104		mfree_sta_priv_lock(pstapriv);
105		kfree(pstapriv->pallocated_stainfo_buf);
106	}
107	return _SUCCESS;
108}
109
110struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
111{
112	uint tmp_aid;
113	s32	index;
114	struct list_head *phash_list;
115	struct sta_info	*psta;
116	struct  __queue *pfree_sta_queue;
117	struct recv_reorder_ctrl *preorder_ctrl;
118	int i = 0;
119	u16  wRxSeqInitialValue = 0xffff;
120	unsigned long flags;
121
122	pfree_sta_queue = &pstapriv->free_sta_queue;
123	spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
124	if (list_empty(&pfree_sta_queue->queue))
125		psta = NULL;
126	else {
127		psta = LIST_CONTAINOR(pfree_sta_queue->queue.next,
128				      struct sta_info, list);
129		list_del_init(&(psta->list));
130		tmp_aid = psta->aid;
131		_init_stainfo(psta);
132		memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
133		index = wifi_mac_hash(hwaddr);
134		if (index >= NUM_STA) {
135			psta = NULL;
136			goto exit;
137		}
138		phash_list = &(pstapriv->sta_hash[index]);
139		list_add_tail(&psta->hash_list, phash_list);
140		pstapriv->asoc_sta_count++;
141
142/* For the SMC router, the sequence number of first packet of WPS handshake
143 * will be 0. In this case, this packet will be dropped by recv_decache function
144 * if we use the 0x00 as the default value for tid_rxseq variable. So, we
145 * initialize the tid_rxseq variable as the 0xffff.
146 */
147		for (i = 0; i < 16; i++)
148			memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
149				&wRxSeqInitialValue, 2);
150		/* for A-MPDU Rx reordering buffer control */
151		for (i = 0; i < 16; i++) {
152			preorder_ctrl = &psta->recvreorder_ctrl[i];
153			preorder_ctrl->padapter = pstapriv->padapter;
154			preorder_ctrl->indicate_seq = 0xffff;
155			preorder_ctrl->wend_b = 0xffff;
156			preorder_ctrl->wsize_b = 64;
157			_init_queue(&preorder_ctrl->pending_recvframe_queue);
158			r8712_init_recv_timer(preorder_ctrl);
159		}
160	}
161exit:
162	spin_unlock_irqrestore(&(pfree_sta_queue->lock), flags);
163	return psta;
164}
165
166/* using pstapriv->sta_hash_lock to protect */
167void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
168{
169	int i;
170	unsigned long irqL0;
171	struct  __queue *pfree_sta_queue;
172	struct recv_reorder_ctrl *preorder_ctrl;
173	struct	sta_xmit_priv *pstaxmitpriv;
174	struct	xmit_priv *pxmitpriv = &padapter->xmitpriv;
175	struct	sta_priv *pstapriv = &padapter->stapriv;
176
177	if (psta == NULL)
178		return;
179	pfree_sta_queue = &pstapriv->free_sta_queue;
180	pstaxmitpriv = &psta->sta_xmitpriv;
181	spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
182	r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
183	list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
184	spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
185	spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
186	r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
187	list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
188	spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
189	spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
190	r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
191	list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
192	spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
193	spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
194	r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
195	list_del_init(&(pstaxmitpriv->be_q.tx_pending));
196	spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
197	list_del_init(&psta->hash_list);
198	pstapriv->asoc_sta_count--;
199	/* re-init sta_info; 20061114 */
200	_r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
201	_r8712_init_sta_recv_priv(&psta->sta_recvpriv);
202	/* for A-MPDU Rx reordering buffer control,
203	 * cancel reordering_ctrl_timer */
204	for (i = 0; i < 16; i++) {
205		preorder_ctrl = &psta->recvreorder_ctrl[i];
206		_cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
207	}
208	spin_lock(&(pfree_sta_queue->lock));
209	/* insert into free_sta_queue; 20061114 */
210	list_add_tail(&psta->list, &pfree_sta_queue->queue);
211	spin_unlock(&(pfree_sta_queue->lock));
212}
213
214/* free all stainfo which in sta_hash[all] */
215void r8712_free_all_stainfo(struct _adapter *padapter)
216{
217	unsigned long irqL;
218	struct list_head *plist, *phead;
219	s32 index;
220	struct sta_info *psta = NULL;
221	struct	sta_priv *pstapriv = &padapter->stapriv;
222	struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
223
224	if (pstapriv->asoc_sta_count == 1)
225		return;
226	spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
227	for (index = 0; index < NUM_STA; index++) {
228		phead = &(pstapriv->sta_hash[index]);
229		plist = phead->next;
230		while ((end_of_queue_search(phead, plist)) == false) {
231			psta = LIST_CONTAINOR(plist,
232					      struct sta_info, hash_list);
233			plist = plist->next;
234			if (pbcmc_stainfo != psta)
235				r8712_free_stainfo(padapter , psta);
236		}
237	}
238	spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
239}
240
241/* any station allocated can be searched by hash list */
242struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
243{
244	unsigned long	 irqL;
245	struct list_head *plist, *phead;
246	struct sta_info *psta = NULL;
247	u32	index;
248
249	if (hwaddr == NULL)
250		return NULL;
251	index = wifi_mac_hash(hwaddr);
252	spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
253	phead = &(pstapriv->sta_hash[index]);
254	plist = phead->next;
255	while ((end_of_queue_search(phead, plist)) == false) {
256		psta = LIST_CONTAINOR(plist, struct sta_info, hash_list);
257		if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
258			/* if found the matched address */
259			break;
260		}
261		psta = NULL;
262		plist = plist->next;
263	}
264	spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
265	return psta;
266}
267
268void r8712_init_bcmc_stainfo(struct _adapter *padapter)
269{
270	struct sta_info	*psta;
271	struct tx_servq	*ptxservq;
272	unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
273	struct	sta_priv *pstapriv = &padapter->stapriv;
274
275	psta = r8712_alloc_stainfo(pstapriv, bcast_addr);
276	if (psta == NULL)
277		return;
278	ptxservq = &(psta->sta_xmitpriv.be_q);
279}
280
281struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
282{
283	struct sta_info *psta;
284	struct sta_priv *pstapriv = &padapter->stapriv;
285	u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
286
287	psta = r8712_get_stainfo(pstapriv, bc_addr);
288	return psta;
289}
290
291
292u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
293{
294	return true;
295}
296