FreeBSD/Linux Kernel Cross Reference
sys/riscv/include/bus_dma_impl.h

     /*-
      * Copyright (c) 2013 The FreeBSD Foundation
      *
      * 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, struct pmap *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);
    };
    
    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

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