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)
  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
  92u32 _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
 102struct 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        }
 149exit:
 150        spin_unlock_irqrestore(&pfree_sta_queue->lock, flags);
 151        return psta;
 152}
 153
 154/* using pstapriv->sta_hash_lock to protect */
 155void 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         */
 193        for (i = 0; i < 16; i++) {
 194                preorder_ctrl = &psta->recvreorder_ctrl[i];
 195                del_timer(&preorder_ctrl->reordering_ctrl_timer);
 196        }
 197        spin_lock(&(pfree_sta_queue->lock));
 198        /* insert into free_sta_queue; 20061114 */
 199        list_add_tail(&psta->list, &pfree_sta_queue->queue);
 200        spin_unlock(&(pfree_sta_queue->lock));
 201}
 202
 203/* free all stainfo which in sta_hash[all] */
 204void r8712_free_all_stainfo(struct _adapter *padapter)
 205{
 206        unsigned long irqL;
 207        struct list_head *plist, *phead;
 208        s32 index;
 209        struct sta_info *psta = NULL;
 210        struct  sta_priv *pstapriv = &padapter->stapriv;
 211        struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
 212
 213        if (pstapriv->asoc_sta_count == 1)
 214                return;
 215        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 216        for (index = 0; index < NUM_STA; index++) {
 217                phead = &(pstapriv->sta_hash[index]);
 218                plist = phead->next;
 219                while (!end_of_queue_search(phead, plist)) {
 220                        psta = container_of(plist,
 221                                            struct sta_info, hash_list);
 222                        plist = plist->next;
 223                        if (pbcmc_stainfo != psta)
 224                                r8712_free_stainfo(padapter, psta);
 225                }
 226        }
 227        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 228}
 229
 230/* any station allocated can be searched by hash list */
 231struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 232{
 233        unsigned long    irqL;
 234        struct list_head *plist, *phead;
 235        struct sta_info *psta = NULL;
 236        u32     index;
 237
 238        if (hwaddr == NULL)
 239                return NULL;
 240        index = wifi_mac_hash(hwaddr);
 241        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 242        phead = &(pstapriv->sta_hash[index]);
 243        plist = phead->next;
 244        while (!end_of_queue_search(phead, plist)) {
 245                psta = container_of(plist, struct sta_info, hash_list);
 246                if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
 247                        /* if found the matched address */
 248                        break;
 249                }
 250                psta = NULL;
 251                plist = plist->next;
 252        }
 253        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 254        return psta;
 255}
 256
 257void r8712_init_bcmc_stainfo(struct _adapter *padapter)
 258{
 259        unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 260        struct  sta_priv *pstapriv = &padapter->stapriv;
 261
 262        r8712_alloc_stainfo(pstapriv, bcast_addr);
 263}
 264
 265struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
 266{
 267        struct sta_priv *pstapriv = &padapter->stapriv;
 268        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 269
 270        return r8712_get_stainfo(pstapriv, bc_addr);
 271}
 272
 273
 274u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
 275{
 276        return true;
 277}
 278