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->asoc_list);
47 _init_listhead(&psta->auth_list);
48 #endif
49 }
50
_r8712_init_sta_priv(struct sta_priv * pstapriv)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 */
mfree_all_stainfo(struct sta_priv * pstapriv)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
mfree_sta_priv_lock(struct sta_priv * pstapriv)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
_r8712_free_sta_priv(struct sta_priv * pstapriv)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
r8712_alloc_stainfo(struct sta_priv * pstapriv,u8 * hwaddr)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 */
r8712_free_stainfo(struct _adapter * padapter,struct sta_info * psta)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] */
r8712_free_all_stainfo(struct _adapter * padapter)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 */
r8712_get_stainfo(struct sta_priv * pstapriv,u8 * hwaddr)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
r8712_init_bcmc_stainfo(struct _adapter * padapter)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
r8712_get_bcmc_stainfo(struct _adapter * padapter)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
r8712_access_ctrl(struct wlan_acl_pool * pacl_list,u8 * mac_addr)297 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
298 {
299 return true;
300 }
301