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// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
*
* Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
*
******************************************************************************/
#define _XMIT_OSDEP_C_
#include <drv_types.h>
#include <rtw_debug.h>
uint rtw_remainder_len(struct pkt_file *pfile)
{
return (pfile->buf_len - ((SIZE_PTR)(pfile->cur_addr) - (SIZE_PTR)(pfile->buf_start)));
}
void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
{
pfile->pkt = pktptr;
pfile->cur_addr = pfile->buf_start = pktptr->data;
pfile->pkt_len = pfile->buf_len = pktptr->len;
pfile->cur_buffer = pfile->buf_start;
}
uint _rtw_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen)
{
uint len = 0;
len = rtw_remainder_len(pfile);
len = (rlen > len) ? len : rlen;
if (rmem)
skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len, rmem, len);
pfile->cur_addr += len;
pfile->pkt_len -= len;
return len;
}
signed int rtw_endofpktfile(struct pkt_file *pfile)
{
if (pfile->pkt_len == 0)
return true;
return false;
}
int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz, u8 flag)
{
if (alloc_sz > 0) {
pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
if (!pxmitbuf->pallocated_buf)
return _FAIL;
pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
}
return _SUCCESS;
}
void rtw_os_xmit_resource_free(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 free_sz, u8 flag)
{
if (free_sz > 0)
kfree(pxmitbuf->pallocated_buf);
}
#define WMM_XMIT_THRESHOLD (NR_XMITFRAME * 2 / 5)
void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
{
u16 queue;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
queue = skb_get_queue_mapping(pkt);
if (padapter->registrypriv.wifi_spec) {
if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
(pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
netif_wake_subqueue(padapter->pnetdev, queue);
} else {
if (__netif_subqueue_stopped(padapter->pnetdev, queue))
netif_wake_subqueue(padapter->pnetdev, queue);
}
dev_kfree_skb_any(pkt);
}
void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
{
if (pxframe->pkt)
rtw_os_pkt_complete(padapter, pxframe->pkt);
pxframe->pkt = NULL;
}
void rtw_os_xmit_schedule(struct adapter *padapter)
{
struct adapter *pri_adapter = padapter;
if (!padapter)
return;
if (!list_empty(&padapter->xmitpriv.pending_xmitbuf_queue.queue))
complete(&pri_adapter->xmitpriv.xmit_comp);
}
static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
{
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
u16 queue;
queue = skb_get_queue_mapping(pkt);
if (padapter->registrypriv.wifi_spec) {
/* No free space for Tx, tx_worker is too slow */
if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD) {
/* DBG_871X("%s(): stop netif_subqueue[%d]\n", __func__, queue); */
netif_stop_subqueue(padapter->pnetdev, queue);
}
} else {
if (pxmitpriv->free_xmitframe_cnt <= 4) {
if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
netif_stop_subqueue(padapter->pnetdev, queue);
}
}
}
static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
{
struct sta_priv *pstapriv = &padapter->stapriv;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct list_head *phead, *plist;
struct sk_buff *newskb;
struct sta_info *psta = NULL;
u8 chk_alive_num = 0;
char chk_alive_list[NUM_STA];
u8 bc_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
u8 null_addr[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
int i;
s32 res;
spin_lock_bh(&pstapriv->asoc_list_lock);
phead = &pstapriv->asoc_list;
plist = get_next(phead);
/* free sta asoc_queue */
while (phead != plist) {
int stainfo_offset;
psta = container_of(plist, struct sta_info, asoc_list);
plist = get_next(plist);
stainfo_offset = rtw_stainfo_offset(pstapriv, psta);
if (stainfo_offset_valid(stainfo_offset)) {
chk_alive_list[chk_alive_num++] = stainfo_offset;
}
}
spin_unlock_bh(&pstapriv->asoc_list_lock);
for (i = 0; i < chk_alive_num; i++) {
psta = rtw_get_stainfo_by_offset(pstapriv, chk_alive_list[i]);
if (!(psta->state & _FW_LINKED))
continue;
/* avoid come from STA1 and send back STA1 */
if (!memcmp(psta->hwaddr, &skb->data[6], 6) ||
!memcmp(psta->hwaddr, null_addr, 6) ||
!memcmp(psta->hwaddr, bc_addr, 6))
continue;
newskb = rtw_skb_copy(skb);
if (newskb) {
memcpy(newskb->data, psta->hwaddr, 6);
res = rtw_xmit(padapter, &newskb);
if (res < 0) {
DBG_871X("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
pxmitpriv->tx_drop++;
dev_kfree_skb_any(newskb);
}
} else {
DBG_871X("%s-%d: rtw_skb_copy() failed!\n", __func__, __LINE__);
pxmitpriv->tx_drop++;
/* dev_kfree_skb_any(skb); */
return false; /* Caller shall tx this multicast frame via normal way. */
}
}
dev_kfree_skb_any(skb);
return true;
}
int _rtw_xmit_entry(struct sk_buff *pkt, struct net_device * pnetdev)
{
struct adapter *padapter = rtw_netdev_priv(pnetdev);
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
s32 res = 0;
RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
if (rtw_if_up(padapter) == false) {
RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
#ifdef DBG_TX_DROP_FRAME
DBG_871X("DBG_TX_DROP_FRAME %s if_up fail\n", __func__);
#endif
goto drop_packet;
}
rtw_check_xmit_resource(padapter, pkt);
if (!rtw_mc2u_disable
&& check_fwstate(pmlmepriv, WIFI_AP_STATE) == true
&& (IP_MCAST_MAC(pkt->data)
|| ICMPV6_MCAST_MAC(pkt->data)
)
&& padapter->registrypriv.wifi_spec == 0) {
if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME / 4)) {
res = rtw_mlcst2unicst(padapter, pkt);
if (res)
goto exit;
} else {
/* DBG_871X("Stop M2U(%d, %d)! ", pxmitpriv->free_xmitframe_cnt, pxmitpriv->free_xmitbuf_cnt); */
/* DBG_871X("!m2u); */
}
}
res = rtw_xmit(padapter, &pkt);
if (res < 0) {
#ifdef DBG_TX_DROP_FRAME
DBG_871X("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __func__);
#endif
goto drop_packet;
}
RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts =%d\n", (u32)pxmitpriv->tx_pkts));
goto exit;
drop_packet:
pxmitpriv->tx_drop++;
dev_kfree_skb_any(pkt);
RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop =%d\n", (u32)pxmitpriv->tx_drop));
exit:
return 0;
}
int rtw_xmit_entry(struct sk_buff *pkt, struct net_device * pnetdev)
{
int ret = 0;
if (pkt) {
rtw_mstat_update(MSTAT_TYPE_SKB, MSTAT_ALLOC_SUCCESS, pkt->truesize);
ret = _rtw_xmit_entry(pkt, pnetdev);
}
return ret;
}
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