The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2013 The FreeBSD Foundation
    5  * All rights reserved.
    6  *
    7  * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
    8  * under sponsorship from the FreeBSD Foundation.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD: stable/12/sys/x86/iommu/busdma_dmar.h 326263 2017-11-27 15:11:47Z pfg $
   32  */
   33 
   34 #ifndef __X86_IOMMU_BUSDMA_DMAR_H
   35 #define __X86_IOMMU_BUSDMA_DMAR_H
   36 
   37 struct dmar_map_entry;
   38 TAILQ_HEAD(dmar_map_entries_tailq, dmar_map_entry);
   39 
   40 struct bus_dma_tag_dmar {
   41         struct bus_dma_tag_common common;
   42         struct dmar_ctx *ctx;
   43         device_t owner;
   44         int map_count;
   45         bus_dma_segment_t *segments;
   46 };
   47 
   48 struct bus_dmamap_dmar {
   49         struct bus_dma_tag_dmar *tag;
   50         struct memdesc mem;
   51         bus_dmamap_callback_t *callback;
   52         void *callback_arg;
   53         struct dmar_map_entries_tailq map_entries;
   54         TAILQ_ENTRY(bus_dmamap_dmar) delay_link;
   55         bool locked;
   56         bool cansleep;
   57         int flags;
   58 };
   59 
   60 #define BUS_DMAMAP_DMAR_MALLOC  0x0001
   61 #define BUS_DMAMAP_DMAR_KMEM_ALLOC 0x0002
   62 
   63 extern struct bus_dma_impl bus_dma_dmar_impl;
   64 
   65 bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
   66 
   67 #endif

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