/******************************************************************************
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* rtl871x_sta_mgt.c
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*
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* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
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* Linux device driver for RTL8192SU
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* Modifications for inclusion into the Linux staging tree are
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* Copyright(c) 2010 Larry Finger. All rights reserved.
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*
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* Contact information:
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* WLAN FAE <wlanfae@realtek.com>
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* Larry Finger <Larry.Finger@lwfinger.net>
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*
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******************************************************************************/
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#define _RTL871X_STA_MGT_C_
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#include "osdep_service.h"
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#include "drv_types.h"
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#include "recv_osdep.h"
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#include "xmit_osdep.h"
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#include "sta_info.h"
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static void _init_stainfo(struct sta_info *psta)
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{
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memset((u8 *)psta, 0, sizeof(struct sta_info));
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spin_lock_init(&psta->lock);
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INIT_LIST_HEAD(&psta->list);
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INIT_LIST_HEAD(&psta->hash_list);
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_r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
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_r8712_init_sta_recv_priv(&psta->sta_recvpriv);
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INIT_LIST_HEAD(&psta->asoc_list);
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INIT_LIST_HEAD(&psta->auth_list);
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}
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u32 _r8712_init_sta_priv(struct sta_priv *pstapriv)
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{
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struct sta_info *psta;
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s32 i;
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pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) *
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NUM_STA + 4, GFP_ATOMIC);
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if (!pstapriv->pallocated_stainfo_buf)
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return _FAIL;
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pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
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((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
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_init_queue(&pstapriv->free_sta_queue);
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spin_lock_init(&pstapriv->sta_hash_lock);
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pstapriv->asoc_sta_count = 0;
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_init_queue(&pstapriv->sleep_q);
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_init_queue(&pstapriv->wakeup_q);
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psta = (struct sta_info *)(pstapriv->pstainfo_buf);
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for (i = 0; i < NUM_STA; i++) {
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_init_stainfo(psta);
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INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
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list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue);
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psta++;
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}
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INIT_LIST_HEAD(&pstapriv->asoc_list);
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INIT_LIST_HEAD(&pstapriv->auth_list);
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return _SUCCESS;
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}
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/* this function is used to free the memory of lock || sema for all stainfos */
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static void mfree_all_stainfo(struct sta_priv *pstapriv)
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{
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unsigned long irqL;
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struct list_head *plist, *phead;
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spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
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phead = &pstapriv->free_sta_queue.queue;
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plist = phead->next;
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while (!end_of_queue_search(phead, plist))
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plist = plist->next;
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spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
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}
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u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
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{
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if (pstapriv) {
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/* be done before free sta_hash_lock */
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mfree_all_stainfo(pstapriv);
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kfree(pstapriv->pallocated_stainfo_buf);
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}
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return _SUCCESS;
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}
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struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
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{
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s32 index;
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struct list_head *phash_list;
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struct sta_info *psta;
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struct __queue *pfree_sta_queue;
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struct recv_reorder_ctrl *preorder_ctrl;
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int i = 0;
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u16 wRxSeqInitialValue = 0xffff;
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unsigned long flags;
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pfree_sta_queue = &pstapriv->free_sta_queue;
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spin_lock_irqsave(&pfree_sta_queue->lock, flags);
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psta = list_first_entry_or_null(&pfree_sta_queue->queue,
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struct sta_info, list);
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if (psta) {
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list_del_init(&psta->list);
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_init_stainfo(psta);
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memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
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index = wifi_mac_hash(hwaddr);
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if (index >= NUM_STA) {
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psta = NULL;
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goto exit;
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}
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phash_list = &pstapriv->sta_hash[index];
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list_add_tail(&psta->hash_list, phash_list);
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pstapriv->asoc_sta_count++;
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/* For the SMC router, the sequence number of first packet of WPS handshake
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* will be 0. In this case, this packet will be dropped by recv_decache function
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* if we use the 0x00 as the default value for tid_rxseq variable. So, we
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* initialize the tid_rxseq variable as the 0xffff.
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*/
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for (i = 0; i < 16; i++)
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memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
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&wRxSeqInitialValue, 2);
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/* for A-MPDU Rx reordering buffer control */
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for (i = 0; i < 16; i++) {
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preorder_ctrl = &psta->recvreorder_ctrl[i];
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preorder_ctrl->padapter = pstapriv->padapter;
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preorder_ctrl->indicate_seq = 0xffff;
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preorder_ctrl->wend_b = 0xffff;
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preorder_ctrl->wsize_b = 64;
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_init_queue(&preorder_ctrl->pending_recvframe_queue);
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r8712_init_recv_timer(preorder_ctrl);
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}
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}
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exit:
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spin_unlock_irqrestore(&pfree_sta_queue->lock, flags);
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return psta;
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}
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/* using pstapriv->sta_hash_lock to protect */
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void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
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{
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int i;
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unsigned long irqL0;
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struct __queue *pfree_sta_queue;
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struct recv_reorder_ctrl *preorder_ctrl;
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struct sta_xmit_priv *pstaxmitpriv;
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struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
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struct sta_priv *pstapriv = &padapter->stapriv;
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if (psta == NULL)
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return;
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pfree_sta_queue = &pstapriv->free_sta_queue;
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pstaxmitpriv = &psta->sta_xmitpriv;
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spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
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r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
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list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
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spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
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spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
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r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
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list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
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spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
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spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
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r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
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list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
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spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
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spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
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r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
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list_del_init(&(pstaxmitpriv->be_q.tx_pending));
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spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
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list_del_init(&psta->hash_list);
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pstapriv->asoc_sta_count--;
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/* re-init sta_info; 20061114 */
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_r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
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_r8712_init_sta_recv_priv(&psta->sta_recvpriv);
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/* for A-MPDU Rx reordering buffer control,
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* cancel reordering_ctrl_timer
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*/
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for (i = 0; i < 16; i++) {
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preorder_ctrl = &psta->recvreorder_ctrl[i];
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del_timer(&preorder_ctrl->reordering_ctrl_timer);
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}
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spin_lock(&(pfree_sta_queue->lock));
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/* insert into free_sta_queue; 20061114 */
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list_add_tail(&psta->list, &pfree_sta_queue->queue);
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spin_unlock(&(pfree_sta_queue->lock));
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}
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/* free all stainfo which in sta_hash[all] */
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void r8712_free_all_stainfo(struct _adapter *padapter)
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{
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unsigned long irqL;
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struct list_head *plist, *phead;
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s32 index;
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struct sta_info *psta = NULL;
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struct sta_priv *pstapriv = &padapter->stapriv;
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struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);
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if (pstapriv->asoc_sta_count == 1)
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return;
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spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
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for (index = 0; index < NUM_STA; index++) {
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phead = &(pstapriv->sta_hash[index]);
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plist = phead->next;
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while (!end_of_queue_search(phead, plist)) {
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psta = container_of(plist,
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struct sta_info, hash_list);
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plist = plist->next;
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if (pbcmc_stainfo != psta)
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r8712_free_stainfo(padapter, psta);
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}
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}
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spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
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}
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/* any station allocated can be searched by hash list */
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struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
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{
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unsigned long irqL;
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struct list_head *plist, *phead;
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struct sta_info *psta = NULL;
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u32 index;
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if (hwaddr == NULL)
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return NULL;
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index = wifi_mac_hash(hwaddr);
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spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
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phead = &(pstapriv->sta_hash[index]);
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plist = phead->next;
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while (!end_of_queue_search(phead, plist)) {
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psta = container_of(plist, struct sta_info, hash_list);
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if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
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/* if found the matched address */
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break;
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}
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psta = NULL;
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plist = plist->next;
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}
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spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
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return psta;
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}
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void r8712_init_bcmc_stainfo(struct _adapter *padapter)
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{
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unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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struct sta_priv *pstapriv = &padapter->stapriv;
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r8712_alloc_stainfo(pstapriv, bcast_addr);
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}
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struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
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{
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struct sta_priv *pstapriv = &padapter->stapriv;
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u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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return r8712_get_stainfo(pstapriv, bc_addr);
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}
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u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
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{
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return true;
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}
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