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      1 /*	$NetBSD: fdt_iommu.h,v 1.1 2025/09/06 20:11:30 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2021 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _DEV_FDT_FDT_IOMMU_H_
     30 #define	_DEV_FDT_FDT_IOMMU_H_
     31 
     32 #include <sys/bus.h>
     33 #include <sys/device.h>
     34 
     35 struct fdtbus_iommu_func {
     36 	bus_dma_tag_t (*map)(device_t, const u_int *, bus_dma_tag_t);
     37 };
     38 
     39 int		fdtbus_register_iommu(device_t, int,
     40 		    const struct fdtbus_iommu_func *);
     41 
     42 bus_dma_tag_t	fdtbus_iommu_map(int, u_int, bus_dma_tag_t);
     43 bus_dma_tag_t	fdtbus_iommu_map_pci(int, uint32_t, bus_dma_tag_t);
     44 
     45 #endif /* _DEV_FDT_FDT_IOMMU_H_ */
     46