LXR linux/drivers/staging/rtl8712/rtl871x_sta

   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
  37static 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
  49u32 _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 */
  78static 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
  93static void mfree_sta_priv_lock(struct  sta_priv *pstapriv)
  94{
  95         mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
  96}
  97
  98u32 _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
 107struct 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        }
 156exit:
 157        spin_unlock_irqrestore(&(pfree_sta_queue->lock), flags);
 158        return psta;
 159}
 160
 161/* using pstapriv->sta_hash_lock to protect */
 162void 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] */
 210void 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)) {
 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 */
 237struct 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)) {
 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
 263void 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
 271struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
 272{
 273        struct sta_priv *pstapriv = &padapter->stapriv;
 274        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 275
 276        return r8712_get_stainfo(pstapriv, bc_addr);
 277}
 278
 279
 280u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
 281{
 282        return true;
 283}
 284