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