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