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