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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_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 | ||
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 */ | |
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 | ||
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 | ||
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 | ||
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 */ | |
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] */ | |
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 */ | |
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 | ||
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 | ||
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 | ||
296 | u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr) | |
297 | { | |
298 | return true; | |
299 | } |