drivers/scsi/thor/include/com_tag.h

#ifndef __MV_COM_TAG_H__
#define __MV_COM_TAG_H__

#include "com_define.h"

typedef struct _Tag_Stack Tag_Stack, *PTag_Stack;

#define FILO_TAG 0x00
#define FIFO_TAG 0x01

/* if TagStackType!=FIFO_TAG, use FILO, */
/* if TagStackType==FIFO_TAG, use FIFO, PtrOut is the next tag to get */
/*  and Top is the number of available tags in the stack */
/* when use FIFO, get tag from PtrOut and free tag to (PtrOut+Top)%Size */
struct _Tag_Stack
{
	MV_PU16  Stack;
	MV_U16   Top;
	MV_U16   Size;
	MV_U16   PtrOut;
	MV_U8    TagStackType;
#ifndef _OS_BIOS
	MV_U8    Reserved[1];	
#endif
};

MV_U16 Tag_GetOne(PTag_Stack pTagStack);
MV_VOID Tag_ReleaseOne(PTag_Stack pTagStack, MV_U16 tag);
MV_VOID Tag_Init(PTag_Stack pTagStack, MV_U16 size);
MV_VOID Tag_Init_FIFO( PTag_Stack pTagStack, MV_U16 size );
MV_BOOLEAN Tag_IsEmpty(PTag_Stack pTagStack);

#endif /*  __MV_COM_TAG_H__ */