Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.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_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
49 u32 _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 */
78 static void mfree_all_stainfo(struct sta_priv *pstapriv)
79 {
80         unsigned long irqL;
81         struct list_head *plist, *phead;
82
83         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
84         phead = &pstapriv->free_sta_queue.queue;
85         plist = phead->next;
86         while ((end_of_queue_search(phead, plist)) == false)
87                 plist = plist->next;
88
89         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
90 }
91
92
93 static void mfree_sta_priv_lock(struct  sta_priv *pstapriv)
94 {
95          mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
96 }
97
98 u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
99 {
100         if (pstapriv) {
101                 mfree_sta_priv_lock(pstapriv);
102                 kfree(pstapriv->pallocated_stainfo_buf);
103         }
104         return _SUCCESS;
105 }
106
107 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
108 {
109         s32     index;
110         struct list_head *phash_list;
111         struct sta_info *psta;
112         struct  __queue *pfree_sta_queue;
113         struct recv_reorder_ctrl *preorder_ctrl;
114         int i = 0;
115         u16  wRxSeqInitialValue = 0xffff;
116         unsigned long flags;
117
118         pfree_sta_queue = &pstapriv->free_sta_queue;
119         spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
120         if (list_empty(&pfree_sta_queue->queue))
121                 psta = NULL;
122         else {
123                 psta = LIST_CONTAINOR(pfree_sta_queue->queue.next,
124                                       struct sta_info, list);
125                 list_del_init(&(psta->list));
126                 _init_stainfo(psta);
127                 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
128                 index = wifi_mac_hash(hwaddr);
129                 if (index >= NUM_STA) {
130                         psta = NULL;
131                         goto exit;
132                 }
133                 phash_list = &(pstapriv->sta_hash[index]);
134                 list_add_tail(&psta->hash_list, phash_list);
135                 pstapriv->asoc_sta_count++;
136
137 /* For the SMC router, the sequence number of first packet of WPS handshake
138  * will be 0. In this case, this packet will be dropped by recv_decache function
139  * if we use the 0x00 as the default value for tid_rxseq variable. So, we
140  * initialize the tid_rxseq variable as the 0xffff.
141  */
142                 for (i = 0; i < 16; i++)
143                         memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
144                                 &wRxSeqInitialValue, 2);
145                 /* for A-MPDU Rx reordering buffer control */
146                 for (i = 0; i < 16; i++) {
147                         preorder_ctrl = &psta->recvreorder_ctrl[i];
148                         preorder_ctrl->padapter = pstapriv->padapter;
149                         preorder_ctrl->indicate_seq = 0xffff;
150                         preorder_ctrl->wend_b = 0xffff;
151                         preorder_ctrl->wsize_b = 64;
152                         _init_queue(&preorder_ctrl->pending_recvframe_queue);
153                         r8712_init_recv_timer(preorder_ctrl);
154                 }
155         }
156 exit:
157         spin_unlock_irqrestore(&(pfree_sta_queue->lock), flags);
158         return psta;
159 }
160
161 /* using pstapriv->sta_hash_lock to protect */
162 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
163 {
164         int i;
165         unsigned long irqL0;
166         struct  __queue *pfree_sta_queue;
167         struct recv_reorder_ctrl *preorder_ctrl;
168         struct  sta_xmit_priv *pstaxmitpriv;
169         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
170         struct  sta_priv *pstapriv = &padapter->stapriv;
171
172         if (psta == NULL)
173                 return;
174         pfree_sta_queue = &pstapriv->free_sta_queue;
175         pstaxmitpriv = &psta->sta_xmitpriv;
176         spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
177         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
178         list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
179         spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
180         spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
181         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
182         list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
183         spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
184         spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
185         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
186         list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
187         spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
188         spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
189         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
190         list_del_init(&(pstaxmitpriv->be_q.tx_pending));
191         spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
192         list_del_init(&psta->hash_list);
193         pstapriv->asoc_sta_count--;
194         /* re-init sta_info; 20061114 */
195         _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
196         _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
197         /* for A-MPDU Rx reordering buffer control,
198          * cancel reordering_ctrl_timer */
199         for (i = 0; i < 16; i++) {
200                 preorder_ctrl = &psta->recvreorder_ctrl[i];
201                 del_timer(&preorder_ctrl->reordering_ctrl_timer);
202         }
203         spin_lock(&(pfree_sta_queue->lock));
204         /* insert into free_sta_queue; 20061114 */
205         list_add_tail(&psta->list, &pfree_sta_queue->queue);
206         spin_unlock(&(pfree_sta_queue->lock));
207 }
208
209 /* free all stainfo which in sta_hash[all] */
210 void r8712_free_all_stainfo(struct _adapter *padapter)
211 {
212         unsigned long irqL;
213         struct list_head *plist, *phead;
214         s32 index;
215         struct sta_info *psta = NULL;
216         struct  sta_priv *pstapriv = &padapter->stapriv;
217         struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
218
219         if (pstapriv->asoc_sta_count == 1)
220                 return;
221         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
222         for (index = 0; index < NUM_STA; index++) {
223                 phead = &(pstapriv->sta_hash[index]);
224                 plist = phead->next;
225                 while ((end_of_queue_search(phead, plist)) == false) {
226                         psta = LIST_CONTAINOR(plist,
227                                               struct sta_info, hash_list);
228                         plist = plist->next;
229                         if (pbcmc_stainfo != psta)
230                                 r8712_free_stainfo(padapter, psta);
231                 }
232         }
233         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
234 }
235
236 /* any station allocated can be searched by hash list */
237 struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
238 {
239         unsigned long    irqL;
240         struct list_head *plist, *phead;
241         struct sta_info *psta = NULL;
242         u32     index;
243
244         if (hwaddr == NULL)
245                 return NULL;
246         index = wifi_mac_hash(hwaddr);
247         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
248         phead = &(pstapriv->sta_hash[index]);
249         plist = phead->next;
250         while ((end_of_queue_search(phead, plist)) == false) {
251                 psta = LIST_CONTAINOR(plist, struct sta_info, hash_list);
252                 if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
253                         /* if found the matched address */
254                         break;
255                 }
256                 psta = NULL;
257                 plist = plist->next;
258         }
259         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
260         return psta;
261 }
262
263 void r8712_init_bcmc_stainfo(struct _adapter *padapter)
264 {
265         unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
266         struct  sta_priv *pstapriv = &padapter->stapriv;
267
268         r8712_alloc_stainfo(pstapriv, bcast_addr);
269 }
270
271 struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
272 {
273         struct sta_info *psta;
274         struct sta_priv *pstapriv = &padapter->stapriv;
275         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
276
277         psta = r8712_get_stainfo(pstapriv, bc_addr);
278         return psta;
279 }
280
281
282 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
283 {
284         return true;
285 }