busdma_iommu.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2013 The FreeBSD Foundation
    5  *
    6  * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
    7  * under sponsorship from the FreeBSD Foundation.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef __X86_IOMMU_BUSDMA_DMAR_H
   34 #define __X86_IOMMU_BUSDMA_DMAR_H
   35 
   36 #include <dev/iommu/iommu.h>
   37 #include <dev/iommu/iommu_gas.h>
   38 
   39 struct bus_dma_tag_iommu {
   40         struct bus_dma_tag_common common;
   41         struct iommu_ctx *ctx;
   42         device_t owner;
   43         int map_count;
   44         bus_dma_segment_t *segments;
   45 };
   46 
   47 struct bus_dmamap_iommu {
   48         struct bus_dma_tag_iommu *tag;
   49         struct memdesc mem;
   50         bus_dmamap_callback_t *callback;
   51         void *callback_arg;
   52         struct mtx lock;
   53         struct iommu_map_entries_tailq map_entries;
   54         TAILQ_ENTRY(bus_dmamap_iommu) delay_link;
   55         bool locked;
   56         bool cansleep;
   57         int flags;
   58 #ifdef KMSAN
   59         struct memdesc kmsan_mem;
   60 #endif
   61 };
   62 
   63 #define IOMMU_DMAMAP_INIT(map)          mtx_init(&(map)->lock, \
   64                                             "iommu dmamap", NULL, MTX_DEF)
   65 #define IOMMU_DMAMAP_DESTROY(map)       mtx_destroy(&(map)->lock)
   66 #define IOMMU_DMAMAP_LOCK(map)          mtx_lock(&(map)->lock)
   67 #define IOMMU_DMAMAP_UNLOCK(map)        mtx_unlock(&(map)->lock)
   68 
   69 #define BUS_DMAMAP_IOMMU_MALLOC 0x0001
   70 #define BUS_DMAMAP_IOMMU_KMEM_ALLOC 0x0002
   71 
   72 extern struct bus_dma_impl bus_dma_iommu_impl;
   73 
   74 #endif

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FreeBSD/Linux Kernel Cross Reference sys/dev/iommu/busdma_iommu.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/iommu/busdma_iommu.h