FreeBSD/Linux Kernel Cross Reference
sys/x86/iommu/busdma_dmar.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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: releng/12.0/sys/x86/iommu/busdma_dmar.h 326263 2017-11-27 15:11:47Z pfg $
     */
    
    #ifndef __X86_IOMMU_BUSDMA_DMAR_H
    #define __X86_IOMMU_BUSDMA_DMAR_H
    
    struct dmar_map_entry;
    TAILQ_HEAD(dmar_map_entries_tailq, dmar_map_entry);
    
    struct bus_dma_tag_dmar {
            struct bus_dma_tag_common common;
            struct dmar_ctx *ctx;
            device_t owner;
            int map_count;
            bus_dma_segment_t *segments;
    };
    
    struct bus_dmamap_dmar {
            struct bus_dma_tag_dmar *tag;
            struct memdesc mem;
            bus_dmamap_callback_t *callback;
            void *callback_arg;
            struct dmar_map_entries_tailq map_entries;
            TAILQ_ENTRY(bus_dmamap_dmar) delay_link;
            bool locked;
            bool cansleep;
            int flags;
    };
    
    #define BUS_DMAMAP_DMAR_MALLOC  0x0001
    #define BUS_DMAMAP_DMAR_KMEM_ALLOC 0x0002
    
    extern struct bus_dma_impl bus_dma_dmar_impl;
    
    bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
    
    #endif

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