1/* SPDX-License-Identifier: BSD-3-Clause */ 2/* 3 * Virtio-iommu definition v0.12 4 * 5 * Copyright (C) 2019 Arm Ltd. 6 */ 7#ifndef _LINUX_VIRTIO_IOMMU_H 8#define _LINUX_VIRTIO_IOMMU_H 9 10#include "standard-headers/linux/types.h" 11 12/* Feature bits */ 13#define VIRTIO_IOMMU_F_INPUT_RANGE 0 14#define VIRTIO_IOMMU_F_DOMAIN_RANGE 1 15#define VIRTIO_IOMMU_F_MAP_UNMAP 2 16#define VIRTIO_IOMMU_F_BYPASS 3 17#define VIRTIO_IOMMU_F_PROBE 4 18#define VIRTIO_IOMMU_F_MMIO 5 19 20struct virtio_iommu_range_64 { 21 uint64_t start; 22 uint64_t end; 23}; 24 25struct virtio_iommu_range_32 { 26 uint32_t start; 27 uint32_t end; 28}; 29 30struct virtio_iommu_config { 31 /* Supported page sizes */ 32 uint64_t page_size_mask; 33 /* Supported IOVA range */ 34 struct virtio_iommu_range_64 input_range; 35 /* Max domain ID size */ 36 struct virtio_iommu_range_32 domain_range; 37 /* Probe buffer size */ 38 uint32_t probe_size; 39}; 40 41/* Request types */ 42#define VIRTIO_IOMMU_T_ATTACH 0x01 43#define VIRTIO_IOMMU_T_DETACH 0x02 44#define VIRTIO_IOMMU_T_MAP 0x03 45#define VIRTIO_IOMMU_T_UNMAP 0x04 46#define VIRTIO_IOMMU_T_PROBE 0x05 47 48/* Status types */ 49#define VIRTIO_IOMMU_S_OK 0x00 50#define VIRTIO_IOMMU_S_IOERR 0x01 51#define VIRTIO_IOMMU_S_UNSUPP 0x02 52#define VIRTIO_IOMMU_S_DEVERR 0x03 53#define VIRTIO_IOMMU_S_INVAL 0x04 54#define VIRTIO_IOMMU_S_RANGE 0x05 55#define VIRTIO_IOMMU_S_NOENT 0x06 56#define VIRTIO_IOMMU_S_FAULT 0x07 57#define VIRTIO_IOMMU_S_NOMEM 0x08 58 59struct virtio_iommu_req_head { 60 uint8_t type; 61 uint8_t reserved[3]; 62}; 63 64struct virtio_iommu_req_tail { 65 uint8_t status; 66 uint8_t reserved[3]; 67}; 68 69struct virtio_iommu_req_attach { 70 struct virtio_iommu_req_head head; 71 uint32_t domain; 72 uint32_t endpoint; 73 uint8_t reserved[8]; 74 struct virtio_iommu_req_tail tail; 75}; 76 77struct virtio_iommu_req_detach { 78 struct virtio_iommu_req_head head; 79 uint32_t domain; 80 uint32_t endpoint; 81 uint8_t reserved[8]; 82 struct virtio_iommu_req_tail tail; 83}; 84 85#define VIRTIO_IOMMU_MAP_F_READ (1 << 0) 86#define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1) 87#define VIRTIO_IOMMU_MAP_F_MMIO (1 << 2) 88 89#define VIRTIO_IOMMU_MAP_F_MASK (VIRTIO_IOMMU_MAP_F_READ | \ 90 VIRTIO_IOMMU_MAP_F_WRITE | \ 91 VIRTIO_IOMMU_MAP_F_MMIO) 92 93struct virtio_iommu_req_map { 94 struct virtio_iommu_req_head head; 95 uint32_t domain; 96 uint64_t virt_start; 97 uint64_t virt_end; 98 uint64_t phys_start; 99 uint32_t flags; 100 struct virtio_iommu_req_tail tail; 101}; 102 103struct virtio_iommu_req_unmap { 104 struct virtio_iommu_req_head head; 105 uint32_t domain; 106 uint64_t virt_start; 107 uint64_t virt_end; 108 uint8_t reserved[4]; 109 struct virtio_iommu_req_tail tail; 110}; 111 112#define VIRTIO_IOMMU_PROBE_T_NONE 0 113#define VIRTIO_IOMMU_PROBE_T_RESV_MEM 1 114 115#define VIRTIO_IOMMU_PROBE_T_MASK 0xfff 116 117struct virtio_iommu_probe_property { 118 uint16_t type; 119 uint16_t length; 120}; 121 122#define VIRTIO_IOMMU_RESV_MEM_T_RESERVED 0 123#define VIRTIO_IOMMU_RESV_MEM_T_MSI 1 124 125struct virtio_iommu_probe_resv_mem { 126 struct virtio_iommu_probe_property head; 127 uint8_t subtype; 128 uint8_t reserved[3]; 129 uint64_t start; 130 uint64_t end; 131}; 132 133struct virtio_iommu_req_probe { 134 struct virtio_iommu_req_head head; 135 uint32_t endpoint; 136 uint8_t reserved[64]; 137 138 uint8_t properties[]; 139 140 /* 141 * Tail follows the variable-length properties array. No padding, 142 * property lengths are all aligned on 8 bytes. 143 */ 144}; 145 146/* Fault types */ 147#define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0 148#define VIRTIO_IOMMU_FAULT_R_DOMAIN 1 149#define VIRTIO_IOMMU_FAULT_R_MAPPING 2 150 151#define VIRTIO_IOMMU_FAULT_F_READ (1 << 0) 152#define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1) 153#define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2) 154#define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8) 155 156struct virtio_iommu_fault { 157 uint8_t reason; 158 uint8_t reserved[3]; 159 uint32_t flags; 160 uint32_t endpoint; 161 uint8_t reserved2[4]; 162 uint64_t address; 163}; 164 165#endif 166