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

     /* $FreeBSD$ */
     
     #ifndef _MACHINE_BUS_DMA_H_
     #define _MACHINE_BUS_DMA_H_
     
     #define WANT_INLINE_DMAMAP
     #include <sys/bus_dma.h>
     
     #include <machine/bus_dma_impl.h>
    
    /*
     * Allocate a handle for mapping from kva/uva/physical
     * address space into bus device space.
     */
    static inline int
    bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            return (tc->impl->map_create(dmat, flags, mapp));
    }
    
    /*
     * Destroy a handle for mapping from kva/uva/physical
     * address space into bus device space.
     */
    static inline int
    bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            return (tc->impl->map_destroy(dmat, map));
    }
    
    /*
     * Allocate a piece of memory that can be efficiently mapped into
     * bus device space based on the constraints listed in the dma tag.
     * A dmamap to for use with dmamap_load is also allocated.
     */
    static inline int
    bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
        bus_dmamap_t *mapp)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            return (tc->impl->mem_alloc(dmat, vaddr, flags, mapp));
    }
    
    /*
     * Free a piece of memory and it's allociated dmamap, that was allocated
     * via bus_dmamem_alloc.  Make the same choice for free/contigfree.
     */
    static inline void
    bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            tc->impl->mem_free(dmat, vaddr, map);
    }
    
    /*
     * Release the mapping held by map.
     */
    static inline void
    bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            tc->impl->map_unload(dmat, map);
    }
    
    static inline void
    bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            tc->impl->map_sync(dmat, map, op);
    }
    
    static inline int
    _bus_dmamap_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)
    {
            struct bus_dma_tag_common *tc;
    
            tc = (struct bus_dma_tag_common *)dmat;
            return (tc->impl->load_phys(dmat, map, buf, buflen, flags, segs,
                segp));
    }
    
    static inline int
    _bus_dmamap_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)
   {
           struct bus_dma_tag_common *tc;
   
           tc = (struct bus_dma_tag_common *)dmat;
           return (tc->impl->load_ma(dmat, map, ma, tlen, ma_offs, flags,
               segs, segp));
   }
   
   static inline int
   _bus_dmamap_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)
   {
           struct bus_dma_tag_common *tc;
   
           tc = (struct bus_dma_tag_common *)dmat;
           return (tc->impl->load_buffer(dmat, map, buf, buflen, pmap, flags, segs,
               segp));
   }
   
   static inline void
   _bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
       struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg)
   {
           struct bus_dma_tag_common *tc;
   
           tc = (struct bus_dma_tag_common *)dmat;
           tc->impl->map_waitok(dmat, map, mem, callback, callback_arg);
   }
   
   static inline bus_dma_segment_t *
   _bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
       bus_dma_segment_t *segs, int nsegs, int error)
   {
           struct bus_dma_tag_common *tc;
   
           tc = (struct bus_dma_tag_common *)dmat;
           return (tc->impl->map_complete(dmat, map, segs, nsegs, error));
   }
   
   #endif /* !_MACHINE_BUS_DMA_H_ */

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