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