/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* Virtio-iommu definition v0.12
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*
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* Copyright (C) 2019 Arm Ltd.
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*/
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#ifndef _UAPI_LINUX_VIRTIO_IOMMU_H
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#define _UAPI_LINUX_VIRTIO_IOMMU_H
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#include <linux/types.h>
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/* Feature bits */
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#define VIRTIO_IOMMU_F_INPUT_RANGE 0
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#define VIRTIO_IOMMU_F_DOMAIN_RANGE 1
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#define VIRTIO_IOMMU_F_MAP_UNMAP 2
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#define VIRTIO_IOMMU_F_BYPASS 3
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#define VIRTIO_IOMMU_F_PROBE 4
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#define VIRTIO_IOMMU_F_MMIO 5
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struct virtio_iommu_range_64 {
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__le64 start;
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__le64 end;
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};
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struct virtio_iommu_range_32 {
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__le32 start;
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__le32 end;
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};
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struct virtio_iommu_config {
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/* Supported page sizes */
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__le64 page_size_mask;
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/* Supported IOVA range */
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struct virtio_iommu_range_64 input_range;
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/* Max domain ID size */
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struct virtio_iommu_range_32 domain_range;
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/* Probe buffer size */
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__le32 probe_size;
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};
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/* Request types */
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#define VIRTIO_IOMMU_T_ATTACH 0x01
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#define VIRTIO_IOMMU_T_DETACH 0x02
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#define VIRTIO_IOMMU_T_MAP 0x03
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#define VIRTIO_IOMMU_T_UNMAP 0x04
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#define VIRTIO_IOMMU_T_PROBE 0x05
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/* Status types */
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#define VIRTIO_IOMMU_S_OK 0x00
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#define VIRTIO_IOMMU_S_IOERR 0x01
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#define VIRTIO_IOMMU_S_UNSUPP 0x02
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#define VIRTIO_IOMMU_S_DEVERR 0x03
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#define VIRTIO_IOMMU_S_INVAL 0x04
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#define VIRTIO_IOMMU_S_RANGE 0x05
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#define VIRTIO_IOMMU_S_NOENT 0x06
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#define VIRTIO_IOMMU_S_FAULT 0x07
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#define VIRTIO_IOMMU_S_NOMEM 0x08
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struct virtio_iommu_req_head {
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__u8 type;
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__u8 reserved[3];
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};
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struct virtio_iommu_req_tail {
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__u8 status;
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__u8 reserved[3];
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};
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struct virtio_iommu_req_attach {
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struct virtio_iommu_req_head head;
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__le32 domain;
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__le32 endpoint;
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__u8 reserved[8];
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struct virtio_iommu_req_tail tail;
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};
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struct virtio_iommu_req_detach {
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struct virtio_iommu_req_head head;
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__le32 domain;
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__le32 endpoint;
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__u8 reserved[8];
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struct virtio_iommu_req_tail tail;
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};
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#define VIRTIO_IOMMU_MAP_F_READ (1 << 0)
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#define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1)
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#define VIRTIO_IOMMU_MAP_F_MMIO (1 << 2)
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#define VIRTIO_IOMMU_MAP_F_MASK (VIRTIO_IOMMU_MAP_F_READ | \
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VIRTIO_IOMMU_MAP_F_WRITE | \
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VIRTIO_IOMMU_MAP_F_MMIO)
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struct virtio_iommu_req_map {
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struct virtio_iommu_req_head head;
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__le32 domain;
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__le64 virt_start;
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__le64 virt_end;
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__le64 phys_start;
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__le32 flags;
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struct virtio_iommu_req_tail tail;
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};
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struct virtio_iommu_req_unmap {
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struct virtio_iommu_req_head head;
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__le32 domain;
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__le64 virt_start;
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__le64 virt_end;
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__u8 reserved[4];
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struct virtio_iommu_req_tail tail;
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};
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#define VIRTIO_IOMMU_PROBE_T_NONE 0
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#define VIRTIO_IOMMU_PROBE_T_RESV_MEM 1
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#define VIRTIO_IOMMU_PROBE_T_MASK 0xfff
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struct virtio_iommu_probe_property {
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__le16 type;
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__le16 length;
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};
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#define VIRTIO_IOMMU_RESV_MEM_T_RESERVED 0
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#define VIRTIO_IOMMU_RESV_MEM_T_MSI 1
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struct virtio_iommu_probe_resv_mem {
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struct virtio_iommu_probe_property head;
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__u8 subtype;
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__u8 reserved[3];
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__le64 start;
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__le64 end;
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};
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struct virtio_iommu_req_probe {
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struct virtio_iommu_req_head head;
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__le32 endpoint;
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__u8 reserved[64];
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__u8 properties[];
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/*
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* Tail follows the variable-length properties array. No padding,
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* property lengths are all aligned on 8 bytes.
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*/
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};
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/* Fault types */
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#define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0
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#define VIRTIO_IOMMU_FAULT_R_DOMAIN 1
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#define VIRTIO_IOMMU_FAULT_R_MAPPING 2
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#define VIRTIO_IOMMU_FAULT_F_READ (1 << 0)
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#define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1)
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#define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2)
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#define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8)
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struct virtio_iommu_fault {
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__u8 reason;
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__u8 reserved[3];
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__le32 flags;
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__le32 endpoint;
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__u8 reserved2[4];
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__le64 address;
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};
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#endif
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