include/standard-headers/linux/virtio_iommu.h

   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 #define VIRTIO_IOMMU_F_BYPASS_CONFIG            6
  20
  21 struct virtio_iommu_range_64 {
  22         uint64_t                                        start;
  23         uint64_t                                        end;
  24 };
  25
  26 struct virtio_iommu_range_32 {
  27         uint32_t                                        start;
  28         uint32_t                                        end;
  29 };
  30
  31 struct virtio_iommu_config {
  32         /* Supported page sizes */
  33         uint64_t                                        page_size_mask;
  34         /* Supported IOVA range */
  35         struct virtio_iommu_range_64            input_range;
  36         /* Max domain ID size */
  37         struct virtio_iommu_range_32            domain_range;
  38         /* Probe buffer size */
  39         uint32_t                                        probe_size;
  40         uint8_t                                 bypass;
  41         uint8_t                                 reserved[3];
  42 };
  43
  44 /* Request types */
  45 #define VIRTIO_IOMMU_T_ATTACH                   0x01
  46 #define VIRTIO_IOMMU_T_DETACH                   0x02
  47 #define VIRTIO_IOMMU_T_MAP                      0x03
  48 #define VIRTIO_IOMMU_T_UNMAP                    0x04
  49 #define VIRTIO_IOMMU_T_PROBE                    0x05
  50
  51 /* Status types */
  52 #define VIRTIO_IOMMU_S_OK                       0x00
  53 #define VIRTIO_IOMMU_S_IOERR                    0x01
  54 #define VIRTIO_IOMMU_S_UNSUPP                   0x02
  55 #define VIRTIO_IOMMU_S_DEVERR                   0x03
  56 #define VIRTIO_IOMMU_S_INVAL                    0x04
  57 #define VIRTIO_IOMMU_S_RANGE                    0x05
  58 #define VIRTIO_IOMMU_S_NOENT                    0x06
  59 #define VIRTIO_IOMMU_S_FAULT                    0x07
  60 #define VIRTIO_IOMMU_S_NOMEM                    0x08
  61
  62 struct virtio_iommu_req_head {
  63         uint8_t                                 type;
  64         uint8_t                                 reserved[3];
  65 };
  66
  67 struct virtio_iommu_req_tail {
  68         uint8_t                                 status;
  69         uint8_t                                 reserved[3];
  70 };
  71
  72 #define VIRTIO_IOMMU_ATTACH_F_BYPASS            (1 << 0)
  73
  74 struct virtio_iommu_req_attach {
  75         struct virtio_iommu_req_head            head;
  76         uint32_t                                        domain;
  77         uint32_t                                        endpoint;
  78         uint32_t                                        flags;
  79         uint8_t                                 reserved[4];
  80         struct virtio_iommu_req_tail            tail;
  81 };
  82
  83 struct virtio_iommu_req_detach {
  84         struct virtio_iommu_req_head            head;
  85         uint32_t                                        domain;
  86         uint32_t                                        endpoint;
  87         uint8_t                                 reserved[8];
  88         struct virtio_iommu_req_tail            tail;
  89 };
  90
  91 #define VIRTIO_IOMMU_MAP_F_READ                 (1 << 0)
  92 #define VIRTIO_IOMMU_MAP_F_WRITE                (1 << 1)
  93 #define VIRTIO_IOMMU_MAP_F_MMIO                 (1 << 2)
  94
  95 #define VIRTIO_IOMMU_MAP_F_MASK                 (VIRTIO_IOMMU_MAP_F_READ |      \
  96                                                  VIRTIO_IOMMU_MAP_F_WRITE |     \
  97                                                  VIRTIO_IOMMU_MAP_F_MMIO)
  98
  99 struct virtio_iommu_req_map {
 100         struct virtio_iommu_req_head            head;
 101         uint32_t                                        domain;
 102         uint64_t                                        virt_start;
 103         uint64_t                                        virt_end;
 104         uint64_t                                        phys_start;
 105         uint32_t                                        flags;
 106         struct virtio_iommu_req_tail            tail;
 107 };
 108
 109 struct virtio_iommu_req_unmap {
 110         struct virtio_iommu_req_head            head;
 111         uint32_t                                        domain;
 112         uint64_t                                        virt_start;
 113         uint64_t                                        virt_end;
 114         uint8_t                                 reserved[4];
 115         struct virtio_iommu_req_tail            tail;
 116 };
 117
 118 #define VIRTIO_IOMMU_PROBE_T_NONE               0
 119 #define VIRTIO_IOMMU_PROBE_T_RESV_MEM           1
 120
 121 #define VIRTIO_IOMMU_PROBE_T_MASK               0xfff
 122
 123 struct virtio_iommu_probe_property {
 124         uint16_t                                        type;
 125         uint16_t                                        length;
 126 };
 127
 128 #define VIRTIO_IOMMU_RESV_MEM_T_RESERVED        0
 129 #define VIRTIO_IOMMU_RESV_MEM_T_MSI             1
 130
 131 struct virtio_iommu_probe_resv_mem {
 132         struct virtio_iommu_probe_property      head;
 133         uint8_t                                 subtype;
 134         uint8_t                                 reserved[3];
 135         uint64_t                                        start;
 136         uint64_t                                        end;
 137 };
 138
 139 struct virtio_iommu_req_probe {
 140         struct virtio_iommu_req_head            head;
 141         uint32_t                                        endpoint;
 142         uint8_t                                 reserved[64];
 143
 144         uint8_t                                 properties[];
 145
 146         /*
 147          * Tail follows the variable-length properties array. No padding,
 148          * property lengths are all aligned on 8 bytes.
 149          */
 150 };
 151
 152 /* Fault types */
 153 #define VIRTIO_IOMMU_FAULT_R_UNKNOWN            0
 154 #define VIRTIO_IOMMU_FAULT_R_DOMAIN             1
 155 #define VIRTIO_IOMMU_FAULT_R_MAPPING            2
 156
 157 #define VIRTIO_IOMMU_FAULT_F_READ               (1 << 0)
 158 #define VIRTIO_IOMMU_FAULT_F_WRITE              (1 << 1)
 159 #define VIRTIO_IOMMU_FAULT_F_EXEC               (1 << 2)
 160 #define VIRTIO_IOMMU_FAULT_F_ADDRESS            (1 << 8)
 161
 162 struct virtio_iommu_fault {
 163         uint8_t                                 reason;
 164         uint8_t                                 reserved[3];
 165         uint32_t                                        flags;
 166         uint32_t                                        endpoint;
 167         uint8_t                                 reserved2[4];
 168         uint64_t                                        address;
 169 };
 170
 171 #endif