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->asoc_list);
  47         _init_listhead(&psta->auth_list);
  48 #endif
  49 }
  50
  51 u32 _r8712_init_sta_priv(struct sta_priv *pstapriv)
  52 {
  53         struct sta_info *psta;
  54         s32 i;
  55
  56         pstapriv->pallocated_stainfo_buf = _malloc(sizeof(struct sta_info) *
  57                                                    NUM_STA + 4);
  58         if (pstapriv->pallocated_stainfo_buf == NULL)
  59                 return _FAIL;
  60         pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
  61                 ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
  62         _init_queue(&pstapriv->free_sta_queue);
  63         spin_lock_init(&pstapriv->sta_hash_lock);
  64         pstapriv->asoc_sta_count = 0;
  65         _init_queue(&pstapriv->sleep_q);
  66         _init_queue(&pstapriv->wakeup_q);
  67         psta = (struct sta_info *)(pstapriv->pstainfo_buf);
  68         for (i = 0; i < NUM_STA; i++) {
  69                 _init_stainfo(psta);
  70                 _init_listhead(&(pstapriv->sta_hash[i]));
  71                 list_insert_tail(&psta->list,
  72                                  get_list_head(&pstapriv->free_sta_queue));
  73                 psta++;
  74         }
  75 #ifdef CONFIG_R8712_AP
  76         _init_listhead(&pstapriv->asoc_list);
  77         _init_listhead(&pstapriv->auth_list);
  78 #endif
  79         return _SUCCESS;
  80 }
  81
  82 /* this function is used to free the memory of lock || sema for all stainfos */
  83 static void mfree_all_stainfo(struct sta_priv *pstapriv)
  84 {
  85         unsigned long irqL;
  86         struct list_head *plist, *phead;
  87         struct sta_info *psta = NULL;
  88
  89         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
  90         phead = get_list_head(&pstapriv->free_sta_queue);
  91         plist = get_next(phead);
  92         while ((end_of_queue_search(phead, plist)) == false) {
  93                 psta = LIST_CONTAINOR(plist, struct sta_info, list);
  94                 plist = get_next(plist);
  95         }
  96
  97         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
  98 }
  99
 100
 101 static void mfree_sta_priv_lock(struct  sta_priv *pstapriv)
 102 {
 103          mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
 104 }
 105
 106 u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
 107 {
 108         if (pstapriv) {
 109                 mfree_sta_priv_lock(pstapriv);
 110                 kfree(pstapriv->pallocated_stainfo_buf);
 111         }
 112         return _SUCCESS;
 113 }
 114
 115 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 116 {
 117         uint tmp_aid;
 118         s32     index;
 119         struct list_head *phash_list;
 120         struct sta_info *psta;
 121         struct  __queue *pfree_sta_queue;
 122         struct recv_reorder_ctrl *preorder_ctrl;
 123         int i = 0;
 124         u16  wRxSeqInitialValue = 0xffff;
 125         unsigned long flags;
 126
 127         pfree_sta_queue = &pstapriv->free_sta_queue;
 128         spin_lock_irqsave(&(pfree_sta_queue->lock), flags);
 129         if (_queue_empty(pfree_sta_queue) == true)
 130                 psta = NULL;
 131         else {
 132                 psta = LIST_CONTAINOR(get_next(&pfree_sta_queue->queue),
 133                                       struct sta_info, list);
 134                 list_delete(&(psta->list));
 135                 tmp_aid = psta->aid;
 136                 _init_stainfo(psta);
 137                 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
 138                 index = wifi_mac_hash(hwaddr);
 139                 if (index >= NUM_STA) {
 140                         psta = NULL;
 141                         goto exit;
 142                 }
 143                 phash_list = &(pstapriv->sta_hash[index]);
 144                 list_insert_tail(&psta->hash_list, phash_list);
 145                 pstapriv->asoc_sta_count++ ;
 146
 147 /* For the SMC router, the sequence number of first packet of WPS handshake
 148  * will be 0. In this case, this packet will be dropped by recv_decache function
 149  * if we use the 0x00 as the default value for tid_rxseq variable. So, we
 150  * initialize the tid_rxseq variable as the 0xffff.
 151  */
 152                 for (i = 0; i < 16; i++)
 153                         memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
 154                                 &wRxSeqInitialValue, 2);
 155                 /* for A-MPDU Rx reordering buffer control */
 156                 for (i = 0; i < 16 ; i++) {
 157                         preorder_ctrl = &psta->recvreorder_ctrl[i];
 158                         preorder_ctrl->padapter = pstapriv->padapter;
 159                         preorder_ctrl->indicate_seq = 0xffff;
 160                         preorder_ctrl->wend_b = 0xffff;
 161                         preorder_ctrl->wsize_b = 64;
 162                         _init_queue(&preorder_ctrl->pending_recvframe_queue);
 163                         r8712_init_recv_timer(preorder_ctrl);
 164                 }
 165         }
 166 exit:
 167         spin_unlock_irqrestore(&(pfree_sta_queue->lock), flags);
 168         return psta;
 169 }
 170
 171 /* using pstapriv->sta_hash_lock to protect */
 172 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
 173 {
 174         int i;
 175         unsigned long irqL0;
 176         struct  __queue *pfree_sta_queue;
 177         struct recv_reorder_ctrl *preorder_ctrl;
 178         struct  sta_xmit_priv *pstaxmitpriv;
 179         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 180         struct  sta_priv *pstapriv = &padapter->stapriv;
 181
 182         if (psta == NULL)
 183                 return;
 184         pfree_sta_queue = &pstapriv->free_sta_queue;
 185         pstaxmitpriv = &psta->sta_xmitpriv;
 186         spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
 187         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
 188         list_delete(&(pstaxmitpriv->vo_q.tx_pending));
 189         spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
 190         spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
 191         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
 192         list_delete(&(pstaxmitpriv->vi_q.tx_pending));
 193         spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
 194         spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
 195         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
 196         list_delete(&(pstaxmitpriv->bk_q.tx_pending));
 197         spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
 198         spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
 199         r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
 200         list_delete(&(pstaxmitpriv->be_q.tx_pending));
 201         spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
 202         list_delete(&psta->hash_list);
 203         pstapriv->asoc_sta_count--;
 204         /* re-init sta_info; 20061114 */
 205         _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
 206         _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
 207         /* for A-MPDU Rx reordering buffer control,
 208          * cancel reordering_ctrl_timer */
 209         for (i = 0; i < 16; i++) {
 210                 preorder_ctrl = &psta->recvreorder_ctrl[i];
 211                 _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer);
 212         }
 213         spin_lock(&(pfree_sta_queue->lock));
 214         /* insert into free_sta_queue; 20061114 */
 215         list_insert_tail(&psta->list, get_list_head(pfree_sta_queue));
 216         spin_unlock(&(pfree_sta_queue->lock));
 217 }
 218
 219 /* free all stainfo which in sta_hash[all] */
 220 void r8712_free_all_stainfo(struct _adapter *padapter)
 221 {
 222         unsigned long irqL;
 223         struct list_head *plist, *phead;
 224         s32 index;
 225         struct sta_info *psta = NULL;
 226         struct  sta_priv *pstapriv = &padapter->stapriv;
 227         struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
 228
 229         if (pstapriv->asoc_sta_count == 1)
 230                 return;
 231         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 232         for (index = 0; index < NUM_STA; index++) {
 233                 phead = &(pstapriv->sta_hash[index]);
 234                 plist = get_next(phead);
 235                 while ((end_of_queue_search(phead, plist)) == false) {
 236                         psta = LIST_CONTAINOR(plist,
 237                                               struct sta_info, hash_list);
 238                         plist = get_next(plist);
 239                         if (pbcmc_stainfo != psta)
 240                                 r8712_free_stainfo(padapter , psta);
 241                 }
 242         }
 243         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 244 }
 245
 246 /* any station allocated can be searched by hash list */
 247 struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 248 {
 249         unsigned long    irqL;
 250         struct list_head *plist, *phead;
 251         struct sta_info *psta = NULL;
 252         u32     index;
 253
 254         if (hwaddr == NULL)
 255                 return NULL;
 256         index = wifi_mac_hash(hwaddr);
 257         spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 258         phead = &(pstapriv->sta_hash[index]);
 259         plist = get_next(phead);
 260         while ((end_of_queue_search(phead, plist)) == false) {
 261                 psta = LIST_CONTAINOR(plist, struct sta_info, hash_list);
 262                 if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
 263                         /* if found the matched address */
 264                         break;
 265                 }
 266                 psta = NULL;
 267                 plist = get_next(plist);
 268         }
 269         spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 270         return psta;
 271 }
 272
 273 void r8712_init_bcmc_stainfo(struct _adapter *padapter)
 274 {
 275         struct sta_info *psta;
 276         struct tx_servq *ptxservq;
 277         unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 278         struct  sta_priv *pstapriv = &padapter->stapriv;
 279
 280         psta = r8712_alloc_stainfo(pstapriv, bcast_addr);
 281         if (psta == NULL)
 282                 return;
 283         ptxservq = &(psta->sta_xmitpriv.be_q);
 284 }
 285
 286 struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
 287 {
 288         struct sta_info *psta;
 289         struct sta_priv *pstapriv = &padapter->stapriv;
 290         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 291
 292         psta = r8712_get_stainfo(pstapriv, bc_addr);
 293         return psta;
 294 }
 295
 296
 297 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
 298 {
 299         return true;
 300 }