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