drivers/staging/rtl8712/rtl871x_sta_mgt.c

   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 }