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virtio_iommu.h
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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