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/* SPDX-License-Identifier: MIT */
/*
* ioreq.h: I/O request definitions for device models
* Copyright (c) 2004, Intel Corporation.
*/
#ifndef __XEN_PUBLIC_HVM_IOREQ_H__
#define __XEN_PUBLIC_HVM_IOREQ_H__
#define IOREQ_READ 1
#define IOREQ_WRITE 0
#define STATE_IOREQ_NONE 0
#define STATE_IOREQ_READY 1
#define STATE_IOREQ_INPROCESS 2
#define STATE_IORESP_READY 3
#define IOREQ_TYPE_PIO 0 /* pio */
#define IOREQ_TYPE_COPY 1 /* mmio ops */
#define IOREQ_TYPE_PCI_CONFIG 2
#define IOREQ_TYPE_TIMEOFFSET 7
#define IOREQ_TYPE_INVALIDATE 8 /* mapcache */
/*
* VMExit dispatcher should cooperate with instruction decoder to
* prepare this structure and notify service OS and DM by sending
* virq.
*
* For I/O type IOREQ_TYPE_PCI_CONFIG, the physical address is formatted
* as follows:
*
* 63....48|47..40|39..35|34..32|31........0
* SEGMENT |BUS |DEV |FN |OFFSET
*/
struct ioreq {
uint64_t addr; /* physical address */
uint64_t data; /* data (or paddr of data) */
uint32_t count; /* for rep prefixes */
uint32_t size; /* size in bytes */
uint32_t vp_eport; /* evtchn for notifications to/from device model */
uint16_t _pad0;
uint8_t state:4;
uint8_t data_is_ptr:1; /* if 1, data above is the guest paddr
* of the real data to use. */
uint8_t dir:1; /* 1=read, 0=write */
uint8_t df:1;
uint8_t _pad1:1;
uint8_t type; /* I/O type */
};
#endif /* __XEN_PUBLIC_HVM_IOREQ_H__ */
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