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