netif_block.c

RT73无线网络芯片最新linux下驱动 支持到linux2.6.24 并向下兼容

/*
 ***************************************************************************
 * Ralink Tech Inc.
 * 5F, No. 36 Taiyuan St.
 * Jhubei City
 * Hsinchu County 302, Taiwan, R.O.C.
 *
 * (c) Copyright 2002-2008, Ralink Technology, Inc.
 *
 * This program is free software; you can redistribute it and/or modify  * 
 * it under the terms of the GNU General Public License as published by  * 
 * the Free Software Foundation; either version 2 of the License, or     * 
 * (at your option) any later version.                                   * 
 *                                                                       * 
 * 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.,                                       * 
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             * 
 *                                                                       * 
 *************************************************************************
*/

#include "rt_config.h"
#include "netif_block.h"

static NETIF_ENTRY freeNetIfEntryPool[FREE_NETIF_POOL_SIZE];
static LIST_HEADER freeNetIfEntryList;

void initblockQueueTab(
	IN PRTMP_ADAPTER pAd)
{
	int i;

	initList(&freeNetIfEntryList);
	for (i = 0; i < FREE_NETIF_POOL_SIZE; i++)
		insertTailList(&freeNetIfEntryList, (PLIST_ENTRY)&freeNetIfEntryPool[i]);

	for (i=0; i < NUM_OF_TX_RING; i++)
		initList(&pAd->blockQueueTab[i].NetIfList);

	return;
}

BOOLEAN blockNetIf(
	IN PBLOCK_QUEUE_ENTRY pBlockQueueEntry,
	IN PNET_DEV pNetDev)
{
	PNETIF_ENTRY pNetIfEntry = NULL;
	
	if ((pNetIfEntry = (PNETIF_ENTRY)removeHeadList(&freeNetIfEntryList)) != NULL)
	{
		netif_stop_queue(pNetDev);
		pNetIfEntry->pNetDev = pNetDev;
		insertTailList(&pBlockQueueEntry->NetIfList, (PLIST_ENTRY)pNetIfEntry);

		pBlockQueueEntry->SwTxQueueBlockFlag = TRUE;
		DBGPRINT(RT_DEBUG_TRACE, "netif_stop_queue(%s)\n", pNetDev->name);
	}
	else
		return FALSE;

	return TRUE;
}

VOID releaseNetIf(
	IN PBLOCK_QUEUE_ENTRY pBlockQueueEntry)
{
	PNETIF_ENTRY pNetIfEntry = NULL;
	PLIST_HEADER pNetIfList = &pBlockQueueEntry->NetIfList;

	while((pNetIfEntry = (PNETIF_ENTRY)removeHeadList(pNetIfList)) !=  NULL)
	{
		PNET_DEV pNetDev = pNetIfEntry->pNetDev;
		netif_wake_queue(pNetDev);
		insertTailList(&freeNetIfEntryList, (PLIST_ENTRY)pNetIfEntry);

		DBGPRINT(RT_DEBUG_TRACE, "netif_wake_queue(%s)\n", pNetDev->name);
	}
	pBlockQueueEntry->SwTxQueueBlockFlag = FALSE;
	return;
}


VOID StopNetIfQueue(
	IN PRTMP_ADAPTER pAd,
	IN UCHAR QueIdx,
	IN PNDIS_PACKET pPacket)
{
	PNET_DEV NetDev = NULL;
	BOOLEAN valid;


	NetDev = pAd->net_dev;

	// WMM support 4 software queues.
	// One software queue full doesn't mean device have no capbility to transmit packet.
	// So disable block Net-If queue function while WMM enable.
	valid = (pAd->PortCfg.bWmmCapable == TRUE) ? FALSE : TRUE;

	if (valid)
		blockNetIf(&pAd->blockQueueTab[QueIdx], NetDev);
	return;
}