// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
 * rtl871x_sta_mgt.c
 *
 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
 * Linux device driver for RTL8192SU
 *
 * Modifications for inclusion into the Linux staging tree are
 * Copyright(c) 2010 Larry Finger. All rights reserved.
 *
 * Contact information:
 * WLAN FAE <wlanfae@realtek.com>
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 ******************************************************************************/

#define _RTL871X_STA_MGT_C_

#include "osdep_service.h"
#include "drv_types.h"
#include "recv_osdep.h"
#include "xmit_osdep.h"
#include "sta_info.h"

static void _init_stainfo(struct sta_info *psta)
{
        memset((u8 *)psta, 0, sizeof(struct sta_info));
        spin_lock_init(&psta->lock);
        INIT_LIST_HEAD(&psta->list);
        INIT_LIST_HEAD(&psta->hash_list);
        _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
        _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
        INIT_LIST_HEAD(&psta->asoc_list);
        INIT_LIST_HEAD(&psta->auth_list);
}

int _r8712_init_sta_priv(struct sta_priv *pstapriv)
{
        struct sta_info *psta;
        s32 i;

        pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) *
                                                   NUM_STA + 4, GFP_ATOMIC);
        if (!pstapriv->pallocated_stainfo_buf)
                return -ENOMEM;
        pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
                ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3);
        _init_queue(&pstapriv->free_sta_queue);
        spin_lock_init(&pstapriv->sta_hash_lock);
        pstapriv->asoc_sta_count = 0;
        _init_queue(&pstapriv->sleep_q);
        _init_queue(&pstapriv->wakeup_q);
        psta = (struct sta_info *)(pstapriv->pstainfo_buf);
        for (i = 0; i < NUM_STA; i++) {
                _init_stainfo(psta);
                INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
                list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue);
                psta++;
        }
        INIT_LIST_HEAD(&pstapriv->asoc_list);
        INIT_LIST_HEAD(&pstapriv->auth_list);
        return 0;
}

/* this function is used to free the memory of lock || sema for all stainfos */
static void mfree_all_stainfo(struct sta_priv *pstapriv)
{
        unsigned long irqL;
        struct list_head *plist, *phead;

        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
        phead = &pstapriv->free_sta_queue.queue;
        plist = phead->next;
        while (!end_of_queue_search(phead, plist))
                plist = plist->next;

        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
}

void _r8712_free_sta_priv(struct sta_priv *pstapriv)
{
        if (pstapriv) {
                /* be done before free sta_hash_lock */
                mfree_all_stainfo(pstapriv);
                kfree(pstapriv->pallocated_stainfo_buf);
        }
}

struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
{
        s32     index;
        struct list_head *phash_list;
        struct sta_info *psta;
        struct  __queue *pfree_sta_queue;
        struct recv_reorder_ctrl *preorder_ctrl;
        int i = 0;
        u16  wRxSeqInitialValue = 0xffff;
        unsigned long flags;

        pfree_sta_queue = &pstapriv->free_sta_queue;
        spin_lock_irqsave(&pfree_sta_queue->lock, flags);
        psta = list_first_entry_or_null(&pfree_sta_queue->queue,
                                        struct sta_info, list);
        if (psta) {
                list_del_init(&psta->list);
                _init_stainfo(psta);
                memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
                index = wifi_mac_hash(hwaddr);
                if (index >= NUM_STA) {
                        psta = NULL;
                        goto exit;
                }
                phash_list = &pstapriv->sta_hash[index];
                list_add_tail(&psta->hash_list, phash_list);
                pstapriv->asoc_sta_count++;

/* For the SMC router, the sequence number of first packet of WPS handshake
 * will be 0. In this case, this packet will be dropped by recv_decache function
 * if we use the 0x00 as the default value for tid_rxseq variable. So, we
 * initialize the tid_rxseq variable as the 0xffff.
 */
                for (i = 0; i < 16; i++)
                        memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i],
                                &wRxSeqInitialValue, 2);
                /* for A-MPDU Rx reordering buffer control */
                for (i = 0; i < 16; i++) {
                        preorder_ctrl = &psta->recvreorder_ctrl[i];
                        preorder_ctrl->padapter = pstapriv->padapter;
                        preorder_ctrl->indicate_seq = 0xffff;
                        preorder_ctrl->wend_b = 0xffff;
                        preorder_ctrl->wsize_b = 64;
                        _init_queue(&preorder_ctrl->pending_recvframe_queue);
                        r8712_init_recv_timer(preorder_ctrl);
                }
        }
exit:
        spin_unlock_irqrestore(&pfree_sta_queue->lock, flags);
        return psta;
}

/* using pstapriv->sta_hash_lock to protect */
void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta)
{
        int i;
        unsigned long irqL0;
        struct  __queue *pfree_sta_queue;
        struct recv_reorder_ctrl *preorder_ctrl;
        struct  sta_xmit_priv *pstaxmitpriv;
        struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
        struct  sta_priv *pstapriv = &padapter->stapriv;

        if (!psta)
                return;
        pfree_sta_queue = &pstapriv->free_sta_queue;
        pstaxmitpriv = &psta->sta_xmitpriv;
        spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0);
        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
        list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
        spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0);
        spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0);
        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
        list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
        spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0);
        spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0);
        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
        list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
        spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0);
        spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0);
        r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
        list_del_init(&(pstaxmitpriv->be_q.tx_pending));
        spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0);
        list_del_init(&psta->hash_list);
        pstapriv->asoc_sta_count--;
        /* re-init sta_info; 20061114 */
        _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv);
        _r8712_init_sta_recv_priv(&psta->sta_recvpriv);
        /* for A-MPDU Rx reordering buffer control,
         * cancel reordering_ctrl_timer
         */
        for (i = 0; i < 16; i++) {
                preorder_ctrl = &psta->recvreorder_ctrl[i];
                del_timer(&preorder_ctrl->reordering_ctrl_timer);
        }
        spin_lock(&(pfree_sta_queue->lock));
        /* insert into free_sta_queue; 20061114 */
        list_add_tail(&psta->list, &pfree_sta_queue->queue);
        spin_unlock(&(pfree_sta_queue->lock));
}

/* free all stainfo which in sta_hash[all] */
void r8712_free_all_stainfo(struct _adapter *padapter)
{
        unsigned long irqL;
        struct list_head *plist, *phead;
        s32 index;
        struct sta_info *psta = NULL;
        struct  sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter);

        if (pstapriv->asoc_sta_count == 1)
                return;
        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
        for (index = 0; index < NUM_STA; index++) {
                phead = &(pstapriv->sta_hash[index]);
                plist = phead->next;
                while (!end_of_queue_search(phead, plist)) {
                        psta = container_of(plist,
                                            struct sta_info, hash_list);
                        plist = plist->next;
                        if (pbcmc_stainfo != psta)
                                r8712_free_stainfo(padapter, psta);
                }
        }
        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
}

/* any station allocated can be searched by hash list */
struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
{
        unsigned long    irqL;
        struct list_head *plist, *phead;
        struct sta_info *psta = NULL;
        u32     index;

        if (!hwaddr)
                return NULL;
        index = wifi_mac_hash(hwaddr);
        spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL);
        phead = &(pstapriv->sta_hash[index]);
        plist = phead->next;
        while (!end_of_queue_search(phead, plist)) {
                psta = container_of(plist, struct sta_info, hash_list);
                if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) {
                        /* if found the matched address */
                        break;
                }
                psta = NULL;
                plist = plist->next;
        }
        spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
        return psta;
}

void r8712_init_bcmc_stainfo(struct _adapter *padapter)
{
        unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
        struct  sta_priv *pstapriv = &padapter->stapriv;

        r8712_alloc_stainfo(pstapriv, bcast_addr);
}

struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter)
{
        struct sta_priv *pstapriv = &padapter->stapriv;
        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

        return r8712_get_stainfo(pstapriv, bc_addr);
}

u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr)
{
        return true;
}