text: /*-
   * Copyright (c) 2013 The FreeBSD Foundation
   * All rights reserved.
   *
   * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
   * under sponsorship from the FreeBSD Foundation.
   *
   * 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.
   *
   * $FreeBSD$
   */
  
  #ifndef _MACHINE_BUS_DMA_IMPL_H_
  #define	_MACHINE_BUS_DMA_IMPL_H_
  
  struct bus_dma_tag_common {
  	struct bus_dma_impl *impl;
  	struct bus_dma_tag_common *parent;
  	bus_size_t	  alignment;
  	bus_addr_t	  boundary;
  	bus_addr_t	  lowaddr;
  	bus_addr_t	  highaddr;
  	bus_dma_filter_t *filter;
  	void		 *filterarg;
  	bus_size_t	  maxsize;
  	u_int		  nsegments;
  	bus_size_t	  maxsegsz;
  	int		  flags;
  	bus_dma_lock_t	 *lockfunc;
  	void		 *lockfuncarg;
  	int		  ref_count;
  };
  
  struct bus_dma_impl {
  	int (*tag_create)(bus_dma_tag_t parent,
  	    bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
  	    bus_addr_t highaddr, bus_dma_filter_t *filter,
  	    void *filterarg, bus_size_t maxsize, int nsegments,
  	    bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
  	    void *lockfuncarg, bus_dma_tag_t *dmat);
  	int (*tag_destroy)(bus_dma_tag_t dmat);
  	int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
  	int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
  	int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
  	    bus_dmamap_t *mapp);
  	void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
  	int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
  	    bus_dma_segment_t *segs, int *segp);
  	int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    vm_paddr_t buf, bus_size_t buflen, int flags,
  	    bus_dma_segment_t *segs, int *segp);
  	int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    void *buf, bus_size_t buflen, pmap_t pmap, int flags,
  	    bus_dma_segment_t *segs, int *segp);
  	void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    struct memdesc *mem, bus_dmamap_callback_t *callback,
  	    void *callback_arg);
  	bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    bus_dma_segment_t *segs, int nsegs, int error);
  	void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
  	void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
  	    bus_dmasync_op_t op);
  };
  
  void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op);
  int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr);
  int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
      bus_size_t alignment,
      bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
      bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
      int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
      void *lockfuncarg, size_t sz, void **dmat);
  
  extern struct bus_dma_impl bus_dma_bounce_impl;
  
  #endif
  