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