rtl8188eu/os_dep/xmit_linux.c

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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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
*
******************************************************************************/
#define _XMIT_OSDEP_C_
#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <if_ether.h>
#include <ip.h>
#include <wifi.h>
#include <mlme_osdep.h>
#include <xmit_osdep.h>
#include <osdep_intf.h>
#include <circ_buf.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 (_pkt *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;
}
sint rtw_endofpktfile(struct pkt_file *pfile)
{
;
if (pfile->pkt_len == 0) {
;
return true;
}
;
return false;
}
void rtw_set_tx_chksum_offload(_pkt *pkt, struct pkt_attrib *pattrib)
{
#ifdef CONFIG_TCP_CSUM_OFFLOAD_TX
struct sk_buff *skb = (struct sk_buff *)pkt;
pattrib->hw_tcp_csum = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (skb_shinfo(skb)->nr_frags == 0)
{
const struct iphdr *ip = ip_hdr(skb);
if (ip->protocol == IPPROTO_TCP) {
/* TCP checksum offload by HW */
DBG_871X("CHECKSUM_PARTIAL TCP\n");
pattrib->hw_tcp_csum = 1;
/* skb_checksum_help(skb); */
} else if (ip->protocol == IPPROTO_UDP) {
/* DBG_871X("CHECKSUM_PARTIAL UDP\n"); */
#if 1
skb_checksum_help(skb);
#else
/* Set UDP checksum = 0 to skip checksum check */
struct udphdr *udp = skb_transport_header(skb);
udp->check = 0;
#endif
} else {
DBG_871X("%s-%d TCP CSUM offload Error!!\n", __FUNCTION__, __LINE__);
WARN_ON(1); /* we need a WARN() */
}
}
else { /* IP fragmentation case */
DBG_871X("%s-%d nr_frags != 0, using skb_checksum_help(skb);!!\n", __FUNCTION__, __LINE__);
skb_checksum_help(skb);
}
}
#endif
}
int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf,u32 alloc_sz)
{
int i;
struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
struct usb_device *pusbd = pdvobjpriv->pusbdev;
#ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
pxmitbuf->pallocated_buf = rtw_usb_buffer_alloc(pusbd, (size_t)alloc_sz, &pxmitbuf->dma_transfer_addr);
pxmitbuf->pbuf = pxmitbuf->pallocated_buf;
if(pxmitbuf->pallocated_buf == NULL)
return _FAIL;
#else /* CONFIG_USE_USB_BUFFER_ALLOC_TX */
pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
if (pxmitbuf->pallocated_buf == NULL)
{
return _FAIL;
}
pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
pxmitbuf->dma_transfer_addr = 0;
#endif /* CONFIG_USE_USB_BUFFER_ALLOC_TX */
for(i=0; i<8; i++)
{
pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
if(pxmitbuf->pxmit_urb[i] == NULL)
{
DBG_871X("pxmitbuf->pxmit_urb[i]==NULL");
return _FAIL;
}
}
return _SUCCESS;
}
void rtw_os_xmit_resource_free(struct adapter *padapter, struct xmit_buf *pxmitbuf,u32 free_sz)
{
int i;
struct dvobj_priv *pdvobjpriv = adapter_to_dvobj(padapter);
struct usb_device *pusbd = pdvobjpriv->pusbdev;
for(i=0; i<8; i++)
{
if(pxmitbuf->pxmit_urb[i])
{
/* usb_kill_urb(pxmitbuf->pxmit_urb[i]); */
usb_free_urb(pxmitbuf->pxmit_urb[i]);
}
}
#ifdef CONFIG_USE_USB_BUFFER_ALLOC_TX
rtw_usb_buffer_free(pusbd, (size_t)free_sz, pxmitbuf->pallocated_buf, pxmitbuf->dma_transfer_addr);
pxmitbuf->pallocated_buf = NULL;
pxmitbuf->dma_transfer_addr = 0;
#else /* CONFIG_USE_USB_BUFFER_ALLOC_TX */
if(pxmitbuf->pallocated_buf)
rtw_mfree(pxmitbuf->pallocated_buf, free_sz);
#endif /* CONFIG_USE_USB_BUFFER_ALLOC_TX */
}
#define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
void rtw_os_pkt_complete(struct adapter *padapter, _pkt *pkt)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
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);
}
#else
if (netif_queue_stopped(padapter->pnetdev))
netif_wake_queue(padapter->pnetdev);
#endif
rtw_skb_free(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;
_irqL irqL;
struct xmit_priv *pxmitpriv;
if(!padapter)
return;
pxmitpriv = &padapter->xmitpriv;
spin_lock_bh(&pxmitpriv->lock);
if(rtw_txframes_pending(padapter))
tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
spin_unlock_bh(&pxmitpriv->lock);
}
static void rtw_check_xmit_resource(struct adapter *padapter, _pkt *pkt)
{
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
#if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
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", __FUNCTION__, 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);
}
}
#else
if(pxmitpriv->free_xmitframe_cnt<=4)
{
if (!rtw_netif_queue_stopped(padapter->pnetdev))
rtw_netif_stop_queue(padapter->pnetdev);
}
#endif
}
static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
{
struct sta_priv *pstapriv = &padapter->stapriv;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
_irqL irqL;
_list *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 ((rtw_end_of_queue_search(phead, plist)) == false) {
int stainfo_offset;
psta = LIST_CONTAINOR(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 (_rtw_memcmp(psta->hwaddr, &skb->data[6], 6) == true
|| _rtw_memcmp(psta->hwaddr, null_addr, 6) == true
|| _rtw_memcmp(psta->hwaddr, bc_addr, 6) == true
)
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", __FUNCTION__, __LINE__);
pxmitpriv->tx_drop++;
rtw_skb_free(newskb);
} else
pxmitpriv->tx_pkts++;
} else {
DBG_871X("%s-%d: rtw_skb_copy() failed!\n", __FUNCTION__, __LINE__);
pxmitpriv->tx_drop++;
/* rtw_skb_free(skb); */
return false; /* Caller shall tx this multicast frame via normal way. */
}
}
rtw_skb_free(skb);
return true;
}
int _rtw_xmit_entry(_pkt *pkt, _nic_hdl pnetdev)
{
struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
s32 res = 0;
#if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
u16 queue;
#endif
;
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", __FUNCTION__);
#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 == true) {
goto exit;
}
}
}
res = rtw_xmit(padapter, &pkt);
if (res < 0) {
#ifdef DBG_TX_DROP_FRAME
DBG_871X("DBG_TX_DROP_FRAME %s rtw_xmit fail\n", __FUNCTION__);
#endif
goto drop_packet;
}
pxmitpriv->tx_pkts++;
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++;
rtw_skb_free(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(_pkt *pkt, _nic_hdl pnetdev)
{
if (pkt)
rtw_mstat_update(MSTAT_TYPE_SKB, MSTAT_ALLOC_SUCCESS, pkt->truesize);
return _rtw_xmit_entry(pkt, pnetdev);
}