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