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/******************************************************************************
*
* Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
******************************************************************************/
#define _XMIT_OSDEP_C_
#include <osdep_service.h>
#include <drv_types.h>
#include <linux/if_ether.h>
#include <linux/ip.h>
#include <wifi.h>
#include <mlme_osdep.h>
#include <xmit_osdep.h>
#include <osdep_intf.h>
int rtw_os_xmit_resource_alloc23a(struct rtw_adapter *padapter,
struct xmit_buf *pxmitbuf, u32 alloc_sz)
{
int i;
pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
if (pxmitbuf->pallocated_buf == NULL)
return _FAIL;
pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);
for (i = 0; i < 8; i++) {
pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
if (pxmitbuf->pxmit_urb[i] == NULL) {
DBG_8723A("pxmitbuf->pxmit_urb[i]==NULL");
return _FAIL;
}
}
return _SUCCESS;
}
void rtw_os_xmit_resource_free23a(struct rtw_adapter *padapter,
struct xmit_buf *pxmitbuf)
{
int i;
for (i = 0; i < 8; i++)
usb_free_urb(pxmitbuf->pxmit_urb[i]);
kfree(pxmitbuf->pallocated_buf);
}
#define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
void rtw_os_pkt_complete23a(struct rtw_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) {
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_complete23a(struct rtw_adapter *padapter,
struct xmit_frame *pxframe)
{
if (pxframe->pkt)
rtw_os_pkt_complete23a(padapter, pxframe->pkt);
pxframe->pkt = NULL;
}
void rtw_os_xmit_schedule23a(struct rtw_adapter *padapter)
{
struct xmit_priv *pxmitpriv;
if (!padapter)
return;
pxmitpriv = &padapter->xmitpriv;
spin_lock_bh(&pxmitpriv->lock);
if (rtw_txframes_pending23a(padapter))
tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
spin_unlock_bh(&pxmitpriv->lock);
}
static void rtw_check_xmit_resource(struct rtw_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)
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);
}
}
}
int rtw_xmit23a_entry23a(struct sk_buff *skb, struct net_device *pnetdev)
{
struct rtw_adapter *padapter = netdev_priv(pnetdev);
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
int res = 0;
RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, "+xmit_enry\n");
if (!rtw_if_up23a(padapter)) {
RT_TRACE(_module_xmit_osdep_c_, _drv_err_,
"rtw_xmit23a_entry23a: rtw_if_up23a fail\n");
goto drop_packet;
}
rtw_check_xmit_resource(padapter, skb);
res = rtw_xmit23a(padapter, skb);
if (res < 0)
goto drop_packet;
pxmitpriv->tx_pkts++;
RT_TRACE(_module_xmit_osdep_c_, _drv_info_,
"rtw_xmit23a_entry23a: tx_pkts=%d\n",
(u32)pxmitpriv->tx_pkts);
goto exit;
drop_packet:
pxmitpriv->tx_drop++;
dev_kfree_skb_any(skb);
RT_TRACE(_module_xmit_osdep_c_, _drv_notice_,
"rtw_xmit23a_entry23a: drop, tx_drop=%d\n",
(u32)pxmitpriv->tx_drop);
exit:
return 0;
}
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