1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 31 #ifndef __X86_IOMMU_BUSDMA_DMAR_H 32 #define __X86_IOMMU_BUSDMA_DMAR_H 33 34 #include <dev/iommu/iommu.h> 35 #include <dev/iommu/iommu_gas.h> 36 37 struct bus_dma_tag_iommu { 38 struct bus_dma_tag_common common; 39 struct iommu_ctx *ctx; 40 device_t owner; 41 int map_count; 42 bus_dma_segment_t *segments; 43 }; 44 45 struct bus_dmamap_iommu { 46 struct bus_dma_tag_iommu *tag; 47 struct memdesc mem; 48 bus_dmamap_callback_t *callback; 49 void *callback_arg; 50 struct mtx lock; 51 struct iommu_map_entries_tailq map_entries; 52 TAILQ_ENTRY(bus_dmamap_iommu) delay_link; 53 bool locked; 54 bool cansleep; 55 int flags; 56 #ifdef KMSAN 57 struct memdesc kmsan_mem; 58 #endif 59 }; 60 61 #define IOMMU_DMAMAP_INIT(map) mtx_init(&(map)->lock, \ 62 "iommu dmamap", NULL, MTX_DEF) 63 #define IOMMU_DMAMAP_DESTROY(map) mtx_destroy(&(map)->lock) 64 #define IOMMU_DMAMAP_LOCK(map) mtx_lock(&(map)->lock) 65 #define IOMMU_DMAMAP_UNLOCK(map) mtx_unlock(&(map)->lock) 66 67 #define BUS_DMAMAP_IOMMU_MALLOC 0x0001 68 #define BUS_DMAMAP_IOMMU_KMEM_ALLOC 0x0002 69 70 extern struct bus_dma_impl bus_dma_iommu_impl; 71 72 #endif 73