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