text: /*-
   * Copyright 2006 John-Mark Gurney.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: src/sys/sys/_bus_dma.h,v 1.1.10.1.6.1 2010/12/21 17:09:25 kensmith Exp $
   *
   */
  
  #ifndef _SYS__BUS_DMA_H_
  #define _SYS__BUS_DMA_H_
  
  typedef int bus_dmasync_op_t;
  
  /*
   *	bus_dma_tag_t
   *
   *	A machine-dependent opaque type describing the characteristics
   *	of how to perform DMA mappings.  This structure encapsultes
   *	information concerning address and alignment restrictions, number
   *	of S/G segments, amount of data per S/G segment, etc.
   */
  typedef struct bus_dma_tag	*bus_dma_tag_t;
  
  /*
   *	bus_dmamap_t
   *
   *	DMA mapping instance information.
   */
  typedef struct bus_dmamap	*bus_dmamap_t;
  
  /*
   * A function that performs driver-specific synchronization on behalf of
   * busdma.
   */
  typedef enum {
  	BUS_DMA_LOCK	= 0x01,
  	BUS_DMA_UNLOCK	= 0x02,
  } bus_dma_lock_op_t;
  
  typedef void bus_dma_lock_t(void *, bus_dma_lock_op_t);
  
  #endif /* !_SYS__BUS_DMA_H_ */
  