mirror of
https://github.com/lwfinger/rtl8188eu.git
synced 2024-11-09 23:19:39 +00:00
282 lines
7.1 KiB
C
282 lines
7.1 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
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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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*
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******************************************************************************/
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#define _XMIT_OSDEP_C_
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#include <linux/version.h>
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#include <osdep_service.h>
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#include <drv_types.h>
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#include <if_ether.h>
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#include <ip.h>
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#include <wifi.h>
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#include <mlme_osdep.h>
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#include <xmit_osdep.h>
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#include <osdep_intf.h>
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#include <usb_osintf.h>
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uint rtw_remainder_len(struct pkt_file *pfile)
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{
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return pfile->buf_len - ((size_t)(pfile->cur_addr) -
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(size_t)(pfile->buf_start));
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}
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void _rtw_open_pktfile(struct sk_buff *pktptr, struct pkt_file *pfile)
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{
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if (!pktptr) {
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pr_err("8188eu: pktptr is NULL\n");
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return;
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}
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if (!pfile) {
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pr_err("8188eu: pfile is NULL\n");
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return;
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}
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pfile->pkt = pktptr;
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pfile->cur_addr = pktptr->data;
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pfile->buf_start = pktptr->data;
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pfile->pkt_len = pktptr->len;
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pfile->buf_len = pktptr->len;
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pfile->cur_buffer = pfile->buf_start;
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}
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uint _rtw_pktfile_read (struct pkt_file *pfile, u8 *rmem, uint rlen)
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{
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uint len = 0;
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len = rtw_remainder_len(pfile);
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len = (rlen > len) ? len : rlen;
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if (rmem)
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skb_copy_bits(pfile->pkt, pfile->buf_len-pfile->pkt_len, rmem, len);
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pfile->cur_addr += len;
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pfile->pkt_len -= len;
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return len;
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}
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int rtw_endofpktfile(struct pkt_file *pfile)
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{
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if (pfile->pkt_len == 0) {
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return true;
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}
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return false;
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}
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void rtw_set_tx_chksum_offload(struct sk_buff *pkt, struct pkt_attrib *pattrib)
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{
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}
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int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 alloc_sz)
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{
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int i;
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pxmitbuf->pallocated_buf = rtw_zmalloc(alloc_sz);
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if (pxmitbuf->pallocated_buf == NULL)
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return _FAIL;
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pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
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pxmitbuf->dma_transfer_addr = 0;
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for (i = 0; i < 8; i++) {
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pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
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if (pxmitbuf->pxmit_urb[i] == NULL) {
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DBG_88E("pxmitbuf->pxmit_urb[i]==NULL");
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return _FAIL;
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}
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}
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return _SUCCESS;
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}
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void rtw_os_xmit_resource_free(struct adapter *padapter,
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struct xmit_buf *pxmitbuf, u32 free_sz)
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{
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int i;
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for (i = 0; i < 8; i++)
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usb_free_urb(pxmitbuf->pxmit_urb[i]);
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kfree(pxmitbuf->pallocated_buf);
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}
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#define WMM_XMIT_THRESHOLD (NR_XMITFRAME*2/5)
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void rtw_os_pkt_complete(struct adapter *padapter, struct sk_buff *pkt)
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{
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
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u16 queue;
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struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
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queue = skb_get_queue_mapping(pkt);
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if (padapter->registrypriv.wifi_spec) {
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if (__netif_subqueue_stopped(padapter->pnetdev, queue) &&
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(pxmitpriv->hwxmits[queue].accnt < WMM_XMIT_THRESHOLD))
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netif_wake_subqueue(padapter->pnetdev, queue);
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} else {
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if (__netif_subqueue_stopped(padapter->pnetdev, queue))
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netif_wake_subqueue(padapter->pnetdev, queue);
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}
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#else
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if (netif_queue_stopped(padapter->pnetdev))
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netif_wake_queue(padapter->pnetdev);
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#endif
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dev_kfree_skb_any(pkt);
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}
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void rtw_os_xmit_complete(struct adapter *padapter, struct xmit_frame *pxframe)
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{
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if (pxframe->pkt)
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rtw_os_pkt_complete(padapter, pxframe->pkt);
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pxframe->pkt = NULL;
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}
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void rtw_os_xmit_schedule(struct adapter *padapter)
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{
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struct xmit_priv *pxmitpriv;
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if (!padapter)
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return;
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pxmitpriv = &padapter->xmitpriv;
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spin_lock_bh(&pxmitpriv->lock);
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if (rtw_txframes_pending(padapter))
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tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
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spin_unlock_bh(&pxmitpriv->lock);
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}
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static void rtw_check_xmit_resource(struct adapter *padapter, struct sk_buff *pkt)
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{
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struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
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u16 queue;
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queue = skb_get_queue_mapping(pkt);
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if (padapter->registrypriv.wifi_spec) {
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/* No free space for Tx, tx_worker is too slow */
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if (pxmitpriv->hwxmits[queue].accnt > WMM_XMIT_THRESHOLD)
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netif_stop_subqueue(padapter->pnetdev, queue);
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} else {
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if (pxmitpriv->free_xmitframe_cnt <= 4) {
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if (!netif_tx_queue_stopped(netdev_get_tx_queue(padapter->pnetdev, queue)))
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netif_stop_subqueue(padapter->pnetdev, queue);
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}
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}
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}
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static int rtw_mlcst2unicst(struct adapter *padapter, struct sk_buff *skb)
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{
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struct sta_priv *pstapriv = &padapter->stapriv;
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struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
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struct list_head *phead, *plist;
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struct sk_buff *newskb;
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struct sta_info *psta = NULL;
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s32 res;
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spin_lock_bh(&pstapriv->asoc_list_lock);
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phead = &pstapriv->asoc_list;
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plist = phead->next;
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/* free sta asoc_queue */
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while (phead != plist) {
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psta = container_of(plist, struct sta_info, asoc_list);
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plist = plist->next;
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/* avoid come from STA1 and send back STA1 */
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if (!memcmp(psta->hwaddr, &skb->data[6], 6))
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continue;
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newskb = skb_copy(skb, GFP_ATOMIC);
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if (newskb) {
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memcpy(newskb->data, psta->hwaddr, 6);
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res = rtw_xmit(padapter, &newskb);
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if (res < 0) {
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DBG_88E("%s()-%d: rtw_xmit() return error!\n", __func__, __LINE__);
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pxmitpriv->tx_drop++;
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dev_kfree_skb_any(newskb);
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} else {
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pxmitpriv->tx_pkts++;
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}
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} else {
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DBG_88E("%s-%d: skb_copy() failed!\n", __func__, __LINE__);
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pxmitpriv->tx_drop++;
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spin_unlock_bh(&pstapriv->asoc_list_lock);
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return false; /* Caller shall tx this multicast frame via normal way. */
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}
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}
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spin_unlock_bh(&pstapriv->asoc_list_lock);
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dev_kfree_skb_any(skb);
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return true;
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}
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int rtw_xmit_entry(struct sk_buff *pkt, struct net_device *pnetdev)
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{
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struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
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struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
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struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
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s32 res = 0;
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RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("+xmit_enry\n"));
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if (rtw_if_up(padapter) == false) {
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RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit_entry: rtw_if_up fail\n"));
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goto drop_packet;
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}
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rtw_check_xmit_resource(padapter, pkt);
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if (!rtw_mc2u_disable && check_fwstate(pmlmepriv, WIFI_AP_STATE) &&
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(IP_MCAST_MAC(pkt->data) || ICMPV6_MCAST_MAC(pkt->data)) &&
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(padapter->registrypriv.wifi_spec == 0)) {
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if (pxmitpriv->free_xmitframe_cnt > (NR_XMITFRAME/4)) {
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res = rtw_mlcst2unicst(padapter, pkt);
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if (res)
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goto exit;
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}
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}
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res = rtw_xmit(padapter, &pkt);
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if (res < 0)
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goto drop_packet;
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pxmitpriv->tx_pkts++;
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RT_TRACE(_module_xmit_osdep_c_, _drv_info_, ("rtw_xmit_entry: tx_pkts=%d\n", (u32)pxmitpriv->tx_pkts));
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goto exit;
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drop_packet:
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pxmitpriv->tx_drop++;
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dev_kfree_skb_any(pkt);
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RT_TRACE(_module_xmit_osdep_c_, _drv_notice_, ("rtw_xmit_entry: drop, tx_drop=%d\n", (u32)pxmitpriv->tx_drop));
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exit:
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return 0;
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}
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