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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 { 
	__u64					start; 
	__u64					end; 
}; 
 
struct virtio_iommu_range_32 { 
	__u32					start; 
	__u32					end; 
}; 
 
struct virtio_iommu_config { 
	/* Supported page sizes */ 
	__u64					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 */ 
	__u32					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