linux/drivers/staging/rtl8712/rtl871x_sta_mgt.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/******************************************************************************
   3 * rtl871x_sta_mgt.c
   4 *
   5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   6 * Linux device driver for RTL8192SU
   7 *
   8 * Modifications for inclusion into the Linux staging tree are
   9 * Copyright(c) 2010 Larry Finger. All rights reserved.
  10 *
  11 * Contact information:
  12 * WLAN FAE <wlanfae@realtek.com>
  13 * Larry Finger <Larry.Finger@lwfinger.net>
  14 *
  15 ******************************************************************************/
  16
  17#define _RTL871X_STA_MGT_C_
  18
  19#include "osdep_service.h"
  20#include "drv_types.h"
  21#include "recv_osdep.h"
  22#include "xmit_osdep.h"
  23#include "sta_info.h"
  24
  25static void _init_stainfo(struct sta_info *psta)
  26{
  27        memset((u8 *)psta, 0, sizeof(struct sta_info));
  28        spin_lock_init(&psta->lock);
  29        INIT_LIST_HEAD(&psta->list);
  30        INIT_LIST_HEAD(&psta->hash_list);
  31        _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
  32        _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
  33        INIT_LIST_HEAD(&psta->asoc_list);
  34        INIT_LIST_HEAD(&psta->auth_list);
  35}
  36
  37int _r8712_init_sta_priv(struct sta_priv *pstapriv)
  38{
  39        struct sta_info *psta;
  40        s32 i;
  41
  42        pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) *
  43                                                   NUM_STA + 4, GFP_ATOMIC);
  44        if (!pstapriv->pallocated_stainfo_buf)
  45                return -ENOMEM;
  46        pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
  47                ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
  48        _init_queue(&pstapriv->free_sta_queue);
  49        spin_lock_init(&pstapriv->sta_hash_lock);
  50        pstapriv->asoc_sta_count = 0;
  51        _init_queue(&pstapriv->sleep_q);
  52        _init_queue(&pstapriv->wakeup_q);
  53        psta = (struct sta_info *)(pstapriv->pstainfo_buf);
  54        for (i = 0; i < NUM_STA; i++) {
  55                _init_stainfo(psta);
  56                INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
  57                list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue);
  58                psta++;
  59        }
  60        INIT_LIST_HEAD(&pstapriv->asoc_list);
  61        INIT_LIST_HEAD(&pstapriv->auth_list);
  62        return 0;
  63}
  64
  65/* this function is used to free the memory of lock || sema for all stainfos */
  66static void mfree_all_stainfo(struct sta_priv *pstapriv)
  67{
  68        unsigned long irqL;
  69        struct list_head *plist, *phead;
  70
  71        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
  72        phead = &pstapriv->free_sta_queue.queue;
  73        plist = phead->next;
  74        while (!end_of_queue_search(phead, plist))
  75                plist = plist->next;
  76
  77        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
  78}
  79
  80void _r8712_free_sta_priv(struct sta_priv *pstapriv)
  81{
  82        if (pstapriv) {
  83                /* be done before free sta_hash_lock */
  84                mfree_all_stainfo(pstapriv);
  85                kfree(pstapriv->pallocated_stainfo_buf);
  86        }
  87}
  88
  89struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
  90{
  91        s32     index;
  92        struct list_head *phash_list;
  93        struct sta_info *psta;
  94        struct  __queue *pfree_sta_queue;
  95        struct recv_reorder_ctrl *preorder_ctrl;
  96        int i = 0;
  97        u16  wRxSeqInitialValue = 0xffff;
  98        unsigned long flags;
  99
 100        pfree_sta_queue = &pstapriv->free_sta_queue;
 101        spin_lock_irqsave(&pfree_sta_queue->lock, flags);
 102        psta = list_first_entry_or_null(&pfree_sta_queue->queue,
 103                                        struct sta_info, list);
 104        if (psta) {
 105                list_del_init(&psta->list);
 106                _init_stainfo(psta);
 107                memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
 108                index = wifi_mac_hash(hwaddr);
 109                if (index >= NUM_STA) {
 110                        psta = NULL;
 111                        goto exit;
 112                }
 113                phash_list = &pstapriv->sta_hash[index];
 114                list_add_tail(&psta->hash_list, phash_list);
 115                pstapriv->asoc_sta_count++;
 116
 117/* For the SMC router, the sequence number of first packet of WPS handshake
 118 * will be 0. In this case, this packet will be dropped by recv_decache function
 119 * if we use the 0x00 as the default value for tid_rxseq variable. So, we
 120 * initialize the tid_rxseq variable as the 0xffff.
 121 */
 122                for (i = 0; i < 16; i++)
 123                        memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
 124                                &wRxSeqInitialValue, 2);
 125                /* for A-MPDU Rx reordering buffer control */
 126                for (i = 0; i < 16; i++) {
 127                        preorder_ctrl = &psta->recvreorder_ctrl[i];
 128                        preorder_ctrl->padapter = pstapriv->padapter;
 129                        preorder_ctrl->indicate_seq = 0xffff;
 130                        preorder_ctrl->wend_b = 0xffff;
 131                        preorder_ctrl->wsize_b = 64;
 132                        _init_queue(&preorder_ctrl->pending_recvframe_queue);
 133                        r8712_init_recv_timer(preorder_ctrl);
 134                }
 135        }
 136exit:
 137        spin_unlock_irqrestore(&pfree_sta_queue->lock, flags);
 138        return psta;
 139}
 140
 141/* using pstapriv->sta_hash_lock to protect */
 142void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
 143{
 144        int i;
 145        unsigned long irqL0;
 146        struct  __queue *pfree_sta_queue;
 147        struct recv_reorder_ctrl *preorder_ctrl;
 148        struct  sta_xmit_priv *pstaxmitpriv;
 149        struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 150        struct  sta_priv *pstapriv = &padapter->stapriv;
 151
 152        if (!psta)
 153                return;
 154        pfree_sta_queue = &pstapriv->free_sta_queue;
 155        pstaxmitpriv = &psta->sta_xmitpriv;
 156        spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
 157        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
 158        list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
 159        spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
 160        spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
 161        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
 162        list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
 163        spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
 164        spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
 165        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
 166        list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
 167        spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
 168        spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
 169        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
 170        list_del_init(&(pstaxmitpriv->be_q.tx_pending));
 171        spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
 172        list_del_init(&psta->hash_list);
 173        pstapriv->asoc_sta_count--;
 174        /* re-init sta_info; 20061114 */
 175        _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
 176        _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
 177        /* for A-MPDU Rx reordering buffer control,
 178         * cancel reordering_ctrl_timer
 179         */
 180        for (i = 0; i < 16; i++) {
 181                preorder_ctrl = &psta->recvreorder_ctrl[i];
 182                del_timer(&preorder_ctrl->reordering_ctrl_timer);
 183        }
 184        spin_lock(&(pfree_sta_queue->lock));
 185        /* insert into free_sta_queue; 20061114 */
 186        list_add_tail(&psta->list, &pfree_sta_queue->queue);
 187        spin_unlock(&(pfree_sta_queue->lock));
 188}
 189
 190/* free all stainfo which in sta_hash[all] */
 191void r8712_free_all_stainfo(struct _adapter *padapter)
 192{
 193        unsigned long irqL;
 194        struct list_head *plist, *phead;
 195        s32 index;
 196        struct sta_info *psta = NULL;
 197        struct  sta_priv *pstapriv = &padapter->stapriv;
 198        struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
 199
 200        if (pstapriv->asoc_sta_count == 1)
 201                return;
 202        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 203        for (index = 0; index < NUM_STA; index++) {
 204                phead = &(pstapriv->sta_hash[index]);
 205                plist = phead->next;
 206                while (!end_of_queue_search(phead, plist)) {
 207                        psta = container_of(plist,
 208                                            struct sta_info, hash_list);
 209                        plist = plist->next;
 210                        if (pbcmc_stainfo != psta)
 211                                r8712_free_stainfo(padapter, psta);
 212                }
 213        }
 214        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 215}
 216
 217/* any station allocated can be searched by hash list */
 218struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 219{
 220        unsigned long    irqL;
 221        struct list_head *plist, *phead;
 222        struct sta_info *psta = NULL;
 223        u32     index;
 224
 225        if (!hwaddr)
 226                return NULL;
 227        index = wifi_mac_hash(hwaddr);
 228        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
 229        phead = &(pstapriv->sta_hash[index]);
 230        plist = phead->next;
 231        while (!end_of_queue_search(phead, plist)) {
 232                psta = container_of(plist, struct sta_info, hash_list);
 233                if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
 234                        /* if found the matched address */
 235                        break;
 236                }
 237                psta = NULL;
 238                plist = plist->next;
 239        }
 240        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 241        return psta;
 242}
 243
 244void r8712_init_bcmc_stainfo(struct _adapter *padapter)
 245{
 246        unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 247        struct  sta_priv *pstapriv = &padapter->stapriv;
 248
 249        r8712_alloc_stainfo(pstapriv, bcast_addr);
 250}
 251
 252struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
 253{
 254        struct sta_priv *pstapriv = &padapter->stapriv;
 255        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 256
 257        return r8712_get_stainfo(pstapriv, bc_addr);
 258}
 259
 260
 261u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
 262{
 263        return true;
 264}
 265