1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 * rtl871x_sta_mgt.c
4 *
5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
6 * Linux device driver for RTL8192SU
7 *
8 * Modifications for inclusion into the Linux staging tree are
9 * Copyright(c) 2010 Larry Finger. All rights reserved.
10 *
11 * Contact information:
12 * WLAN FAE <wlanfae@realtek.com>
13 * Larry Finger <Larry.Finger@lwfinger.net>
14 *
15 ******************************************************************************/
16
17 #define _RTL871X_STA_MGT_C_
18
19 #include "osdep_service.h"
20 #include "drv_types.h"
21 #include "recv_osdep.h"
22 #include "xmit_osdep.h"
23 #include "sta_info.h"
24
_init_stainfo(struct sta_info * psta)25 static void _init_stainfo(struct sta_info *psta)
26 {
27 memset((u8 *)psta, 0, sizeof(struct sta_info));
28 spin_lock_init(&psta->lock);
29 INIT_LIST_HEAD(&psta->list);
30 INIT_LIST_HEAD(&psta->hash_list);
31 _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
32 _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
33 INIT_LIST_HEAD(&psta->asoc_list);
34 INIT_LIST_HEAD(&psta->auth_list);
35 }
36
_r8712_init_sta_priv(struct sta_priv * pstapriv)37 int _r8712_init_sta_priv(struct sta_priv *pstapriv)
38 {
39 struct sta_info *psta;
40 s32 i;
41
42 pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) *
43 NUM_STA + 4, GFP_ATOMIC);
44 if (!pstapriv->pallocated_stainfo_buf)
45 return -ENOMEM;
46 pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
47 ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
48 _init_queue(&pstapriv->free_sta_queue);
49 spin_lock_init(&pstapriv->sta_hash_lock);
50 pstapriv->asoc_sta_count = 0;
51 _init_queue(&pstapriv->sleep_q);
52 _init_queue(&pstapriv->wakeup_q);
53 psta = (struct sta_info *)(pstapriv->pstainfo_buf);
54 for (i = 0; i < NUM_STA; i++) {
55 _init_stainfo(psta);
56 INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
57 list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue);
58 psta++;
59 }
60 INIT_LIST_HEAD(&pstapriv->asoc_list);
61 INIT_LIST_HEAD(&pstapriv->auth_list);
62 return 0;
63 }
64
65 /* this function is used to free the memory of lock || sema for all stainfos */
mfree_all_stainfo(struct sta_priv * pstapriv)66 static void mfree_all_stainfo(struct sta_priv *pstapriv)
67 {
68 unsigned long irqL;
69 struct list_head *plist, *phead;
70
71 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
72 phead = &pstapriv->free_sta_queue.queue;
73 plist = phead->next;
74 while (!end_of_queue_search(phead, plist))
75 plist = plist->next;
76
77 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
78 }
79
_r8712_free_sta_priv(struct sta_priv * pstapriv)80 void _r8712_free_sta_priv(struct sta_priv *pstapriv)
81 {
82 if (pstapriv) {
83 /* be done before free sta_hash_lock */
84 mfree_all_stainfo(pstapriv);
85 kfree(pstapriv->pallocated_stainfo_buf);
86 }
87 }
88
r8712_alloc_stainfo(struct sta_priv * pstapriv,u8 * hwaddr)89 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
90 {
91 s32 index;
92 struct list_head *phash_list;
93 struct sta_info *psta;
94 struct __queue *pfree_sta_queue;
95 struct recv_reorder_ctrl *preorder_ctrl;
96 int i = 0;
97 u16 wRxSeqInitialValue = 0xffff;
98 unsigned long flags;
99
100 pfree_sta_queue = &pstapriv->free_sta_queue;
101 spin_lock_irqsave(&pfree_sta_queue->lock, flags);
102 psta = list_first_entry_or_null(&pfree_sta_queue->queue,
103 struct sta_info, list);
104 if (psta) {
105 list_del_init(&psta->list);
106 _init_stainfo(psta);
107 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
108 index = wifi_mac_hash(hwaddr);
109 if (index >= NUM_STA) {
110 psta = NULL;
111 goto exit;
112 }
113 phash_list = &pstapriv->sta_hash[index];
114 list_add_tail(&psta->hash_list, phash_list);
115 pstapriv->asoc_sta_count++;
116
117 /* For the SMC router, the sequence number of first packet of WPS handshake
118 * will be 0. In this case, this packet will be dropped by recv_decache function
119 * if we use the 0x00 as the default value for tid_rxseq variable. So, we
120 * initialize the tid_rxseq variable as the 0xffff.
121 */
122 for (i = 0; i < 16; i++)
123 memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
124 &wRxSeqInitialValue, 2);
125 /* for A-MPDU Rx reordering buffer control */
126 for (i = 0; i < 16; i++) {
127 preorder_ctrl = &psta->recvreorder_ctrl[i];
128 preorder_ctrl->padapter = pstapriv->padapter;
129 preorder_ctrl->indicate_seq = 0xffff;
130 preorder_ctrl->wend_b = 0xffff;
131 preorder_ctrl->wsize_b = 64;
132 _init_queue(&preorder_ctrl->pending_recvframe_queue);
133 r8712_init_recv_timer(preorder_ctrl);
134 }
135 }
136 exit:
137 spin_unlock_irqrestore(&pfree_sta_queue->lock, flags);
138 return psta;
139 }
140
141 /* using pstapriv->sta_hash_lock to protect */
r8712_free_stainfo(struct _adapter * padapter,struct sta_info * psta)142 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
143 {
144 int i;
145 unsigned long irqL0;
146 struct __queue *pfree_sta_queue;
147 struct recv_reorder_ctrl *preorder_ctrl;
148 struct sta_xmit_priv *pstaxmitpriv;
149 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
150 struct sta_priv *pstapriv = &padapter->stapriv;
151
152 if (!psta)
153 return;
154 pfree_sta_queue = &pstapriv->free_sta_queue;
155 pstaxmitpriv = &psta->sta_xmitpriv;
156 spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
157 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
158 list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
159 spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
160 spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
161 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
162 list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
163 spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
164 spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
165 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
166 list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
167 spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
168 spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
169 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
170 list_del_init(&(pstaxmitpriv->be_q.tx_pending));
171 spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
172 list_del_init(&psta->hash_list);
173 pstapriv->asoc_sta_count--;
174 /* re-init sta_info; 20061114 */
175 _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
176 _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
177 /* for A-MPDU Rx reordering buffer control,
178 * cancel reordering_ctrl_timer
179 */
180 for (i = 0; i < 16; i++) {
181 preorder_ctrl = &psta->recvreorder_ctrl[i];
182 del_timer(&preorder_ctrl->reordering_ctrl_timer);
183 }
184 spin_lock(&(pfree_sta_queue->lock));
185 /* insert into free_sta_queue; 20061114 */
186 list_add_tail(&psta->list, &pfree_sta_queue->queue);
187 spin_unlock(&(pfree_sta_queue->lock));
188 }
189
190 /* free all stainfo which in sta_hash[all] */
r8712_free_all_stainfo(struct _adapter * padapter)191 void r8712_free_all_stainfo(struct _adapter *padapter)
192 {
193 unsigned long irqL;
194 struct list_head *plist, *phead;
195 s32 index;
196 struct sta_info *psta = NULL;
197 struct sta_priv *pstapriv = &padapter->stapriv;
198 struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
199
200 if (pstapriv->asoc_sta_count == 1)
201 return;
202 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
203 for (index = 0; index < NUM_STA; index++) {
204 phead = &(pstapriv->sta_hash[index]);
205 plist = phead->next;
206 while (!end_of_queue_search(phead, plist)) {
207 psta = container_of(plist,
208 struct sta_info, hash_list);
209 plist = plist->next;
210 if (pbcmc_stainfo != psta)
211 r8712_free_stainfo(padapter, psta);
212 }
213 }
214 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
215 }
216
217 /* any station allocated can be searched by hash list */
r8712_get_stainfo(struct sta_priv * pstapriv,u8 * hwaddr)218 struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
219 {
220 unsigned long irqL;
221 struct list_head *plist, *phead;
222 struct sta_info *psta = NULL;
223 u32 index;
224
225 if (!hwaddr)
226 return NULL;
227 index = wifi_mac_hash(hwaddr);
228 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
229 phead = &(pstapriv->sta_hash[index]);
230 plist = phead->next;
231 while (!end_of_queue_search(phead, plist)) {
232 psta = container_of(plist, struct sta_info, hash_list);
233 if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
234 /* if found the matched address */
235 break;
236 }
237 psta = NULL;
238 plist = plist->next;
239 }
240 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
241 return psta;
242 }
243
r8712_init_bcmc_stainfo(struct _adapter * padapter)244 void r8712_init_bcmc_stainfo(struct _adapter *padapter)
245 {
246 unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
247 struct sta_priv *pstapriv = &padapter->stapriv;
248
249 r8712_alloc_stainfo(pstapriv, bcast_addr);
250 }
251
r8712_get_bcmc_stainfo(struct _adapter * padapter)252 struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
253 {
254 struct sta_priv *pstapriv = &padapter->stapriv;
255 u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
256
257 return r8712_get_stainfo(pstapriv, bc_addr);
258 }
259
260
r8712_access_ctrl(struct wlan_acl_pool * pacl_list,u8 * mac_addr)261 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
262 {
263 return true;
264 }
265
