staging: r8712u: Fix problem when CONFIG_R8712_AP is set
[linux-3.10.git] / drivers / staging / rtl8712 / rtl871x_sta_mgt.c
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
37 static 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_listhead(&psta->list);
42         _init_listhead(&psta->hash_list);
43         _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
44         _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
45 #ifdef CONFIG_R8712_AP
46         _init_listhead(&psta->asoc_list);
47         _init_listhead(&psta->auth_list);
48 #endif
49 }
50
51 u32 _r8712_init_sta_priv(struct sta_priv *pstapriv)
52 {
53         struct sta_info *psta;
54         s32 i;
55
56         pstapriv->pallocated_stainfo_buf = _malloc(sizeof(struct sta_info) *
57                                                    NUM_STA + 4);
58         if (pstapriv->pallocated_stainfo_buf == NULL)
59                 return _FAIL;
60         pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
61                 ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
62         _init_queue(&pstapriv->free_sta_queue);
63         spin_lock_init(&pstapriv->sta_hash_lock);
64         pstapriv->asoc_sta_count = 0;
65         _init_queue(&pstapriv->sleep_q);
66         _init_queue(&pstapriv->wakeup_q);
67         psta = (struct sta_info *)(pstapriv->pstainfo_buf);
68         for (i = 0; i < NUM_STA; i++) {
69                 _init_stainfo(psta);
70                 _init_listhead(&(pstapriv->sta_hash[i]));
71                 list_insert_tail(&psta->list,
72                                  get_list_head(&pstapriv->free_sta_queue));
73                 psta++;
74         }
75 #ifdef CONFIG_R8712_AP
76         _init_listhead(&pstapriv->asoc_list);
77         _init_listhead(&pstapriv->auth_list);
78 #endif
79         return _SUCCESS;
80 }
81
82 /* this function is used to free the memory of lock || sema for all stainfos */
83 static void mfree_all_stainfo(struct sta_priv *pstapriv)
84 {
85         unsigned long irqL;
86         struct list_head *plist, *phead;
87         struct sta_info *psta = NULL;
88
89         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
90         phead = get_list_head(&pstapriv->free_sta_queue);
91         plist = get_next(phead);
92         while ((end_of_queue_search(phead, plist)) == false) {
93                 psta = LIST_CONTAINOR(plist, struct sta_info, list);
94                 plist = get_next(plist);
95         }
96
97         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
98 }
99
100
101 static void mfree_sta_priv_lock(struct  sta_priv *pstapriv)
102 {
103          mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
104 }
105
106 u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
107 {
108         if (pstapriv) {
109                 mfree_sta_priv_lock(pstapriv);
110                 kfree(pstapriv->pallocated_stainfo_buf);
111         }
112         return _SUCCESS;
113 }
114
115 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
116 {
117         uint tmp_aid;
118         s32     index;
119         struct list_head *phash_list;
120         struct sta_info *psta;
121         struct  __queue *pfree_sta_queue;
122         struct recv_reorder_ctrl *preorder_ctrl;
123         int i = 0;
124         u16  wRxSeqInitialValue = 0xffff;
125         unsigned long flags;
126
127         pfree_sta_queue = &pstapriv->free_sta_queue;
128         spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
129         if (_queue_empty(pfree_sta_queue) == true)
130                 psta = NULL;
131         else {
132                 psta = LIST_CONTAINOR(get_next(&pfree_sta_queue->queue),
133                                       struct sta_info, list);
134                 list_delete(&(psta->list));
135                 tmp_aid = psta->aid;
136                 _init_stainfo(psta);
137                 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
138                 index = wifi_mac_hash(hwaddr);
139                 if (index >= NUM_STA) {
140                         psta = NULL;
141                         goto exit;
142                 }
143                 phash_list = &(pstapriv->sta_hash[index]);
144                 list_insert_tail(&psta->hash_list, phash_list);
145                 pstapriv->asoc_sta_count++ ;
146
147 /* For the SMC router, the sequence number of first packet of WPS handshake
148  * will be 0. In this case, this packet will be dropped by recv_decache function
149  * if we use the 0x00 as the default value for tid_rxseq variable. So, we
150  * initialize the tid_rxseq variable as the 0xffff.
151  */
152                 for (i = 0; i < 16; i++)
153                         memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
154                                 &wRxSeqInitialValue, 2);
155                 /* for A-MPDU Rx reordering buffer control */
156                 for (i = 0; i < 16 ; i++) {
157                         preorder_ctrl = &psta->recvreorder_ctrl[i];
158                         preorder_ctrl->padapter = pstapriv->padapter;
159                         preorder_ctrl->indicate_seq = 0xffff;
160                         preorder_ctrl->wend_b = 0xffff;
161                         preorder_ctrl->wsize_b = 64;
162                         _init_queue(&preorder_ctrl->pending_recvframe_queue);
163                         r8712_init_recv_timer(preorder_ctrl);
164                 }
165         }
166 exit:
167         spin_unlock_irqrestore(&(pfree_sta_queue->lock), flags);
168         return psta;
169 }
170
171 /* using pstapriv->sta_hash_lock to protect */
172 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
173 {
174         int i;
175         unsigned long irqL0;
176         struct  __queue *pfree_sta_queue;
177         struct recv_reorder_ctrl *preorder_ctrl;
178         struct  sta_xmit_priv *pstaxmitpriv;
179         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
180         struct  sta_priv *pstapriv = &padapter->stapriv;
181
182         if (psta == NULL)
183                 return;
184         pfree_sta_queue = &pstapriv->free_sta_queue;
185         pstaxmitpriv = &psta->sta_xmitpriv;
186         spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
187         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
188         list_delete(&(pstaxmitpriv->vo_q.tx_pending));
189         spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
190         spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
191         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
192         list_delete(&(pstaxmitpriv->vi_q.tx_pending));
193         spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
194         spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
195         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
196         list_delete(&(pstaxmitpriv->bk_q.tx_pending));
197         spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
198         spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
199         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
200         list_delete(&(pstaxmitpriv->be_q.tx_pending));
201         spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
202         list_delete(&psta->hash_list);
203         pstapriv->asoc_sta_count--;
204         /* re-init sta_info; 20061114 */
205         _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
206         _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
207         /* for A-MPDU Rx reordering buffer control,
208          * cancel reordering_ctrl_timer */
209         for (i = 0; i < 16; i++) {
210                 preorder_ctrl = &psta->recvreorder_ctrl[i];
211                 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
212         }
213         spin_lock(&(pfree_sta_queue->lock));
214         /* insert into free_sta_queue; 20061114 */
215         list_insert_tail(&psta->list, get_list_head(pfree_sta_queue));
216         spin_unlock(&(pfree_sta_queue->lock));
217 }
218
219 /* free all stainfo which in sta_hash[all] */
220 void r8712_free_all_stainfo(struct _adapter *padapter)
221 {
222         unsigned long irqL;
223         struct list_head *plist, *phead;
224         s32 index;
225         struct sta_info *psta = NULL;
226         struct  sta_priv *pstapriv = &padapter->stapriv;
227         struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
228
229         if (pstapriv->asoc_sta_count == 1)
230                 return;
231         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
232         for (index = 0; index < NUM_STA; index++) {
233                 phead = &(pstapriv->sta_hash[index]);
234                 plist = get_next(phead);
235                 while ((end_of_queue_search(phead, plist)) == false) {
236                         psta = LIST_CONTAINOR(plist,
237                                               struct sta_info, hash_list);
238                         plist = get_next(plist);
239                         if (pbcmc_stainfo != psta)
240                                 r8712_free_stainfo(padapter , psta);
241                 }
242         }
243         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
244 }
245
246 /* any station allocated can be searched by hash list */
247 struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
248 {
249         unsigned long    irqL;
250         struct list_head *plist, *phead;
251         struct sta_info *psta = NULL;
252         u32     index;
253
254         if (hwaddr == NULL)
255                 return NULL;
256         index = wifi_mac_hash(hwaddr);
257         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
258         phead = &(pstapriv->sta_hash[index]);
259         plist = get_next(phead);
260         while ((end_of_queue_search(phead, plist)) == false) {
261                 psta = LIST_CONTAINOR(plist, struct sta_info, hash_list);
262                 if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
263                         /* if found the matched address */
264                         break;
265                 }
266                 psta = NULL;
267                 plist = get_next(plist);
268         }
269         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
270         return psta;
271 }
272
273 void r8712_init_bcmc_stainfo(struct _adapter *padapter)
274 {
275         struct sta_info *psta;
276         struct tx_servq *ptxservq;
277         unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
278         struct  sta_priv *pstapriv = &padapter->stapriv;
279
280         psta = r8712_alloc_stainfo(pstapriv, bcast_addr);
281         if (psta == NULL)
282                 return;
283         ptxservq = &(psta->sta_xmitpriv.be_q);
284 }
285
286 struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
287 {
288         struct sta_info *psta;
289         struct sta_priv *pstapriv = &padapter->stapriv;
290         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
291
292         psta = r8712_get_stainfo(pstapriv, bc_addr);
293         return psta;
294 }
295
296
297 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
298 {
299         return true;
300 }