/* SPDX-License-Identifier: MIT */ /* * ioreq.h: I/O request definitions for device models * Copyright (c) 2004, Intel Corporation. */ #ifndef _IOREQ_H_ #define _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 */ }; typedef struct ioreq ioreq_t; struct shared_iopage { struct ioreq vcpu_ioreq[1]; }; typedef struct shared_iopage shared_iopage_t; struct buf_ioreq { uint8_t type; /* I/O type */ uint8_t pad:1; uint8_t dir:1; /* 1=read, 0=write */ uint8_t size:2; /* 0=>1, 1=>2, 2=>4, 3=>8. If 8, use two buf_ioreqs */ uint32_t addr:20;/* physical address */ uint32_t data; /* data */ }; typedef struct buf_ioreq buf_ioreq_t; #define IOREQ_BUFFER_SLOT_NUM 511 /* 8 bytes each, plus 2 4-byte indexes */ struct buffered_iopage { #ifdef __XEN__ union bufioreq_pointers { struct { #endif uint32_t read_pointer; uint32_t write_pointer; #ifdef __XEN__ }; uint64_t full; } ptrs; #endif buf_ioreq_t buf_ioreq[IOREQ_BUFFER_SLOT_NUM]; }; /* NB. Size of this structure must be no greater than one page. */ typedef struct buffered_iopage buffered_iopage_t; /* * ACPI Control/Event register locations. Location is controlled by a * version number in HVM_PARAM_ACPI_IOPORTS_LOCATION. */ /* * Version 0 (default): Traditional (obsolete) Xen locations. * * These are now only used for compatibility with VMs migrated * from older Xen versions. */ #define ACPI_PM1A_EVT_BLK_ADDRESS_V0 0x1f40 #define ACPI_PM1A_CNT_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x04) #define ACPI_PM_TMR_BLK_ADDRESS_V0 (ACPI_PM1A_EVT_BLK_ADDRESS_V0 + 0x08) #define ACPI_GPE0_BLK_ADDRESS_V0 (ACPI_PM_TMR_BLK_ADDRESS_V0 + 0x20) #define ACPI_GPE0_BLK_LEN_V0 0x08 /* Version 1: Locations preferred by modern Qemu (including Qemu-trad). */ #define ACPI_PM1A_EVT_BLK_ADDRESS_V1 0xb000 #define ACPI_PM1A_CNT_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x04) #define ACPI_PM_TMR_BLK_ADDRESS_V1 (ACPI_PM1A_EVT_BLK_ADDRESS_V1 + 0x08) #define ACPI_GPE0_BLK_ADDRESS_V1 0xafe0 #define ACPI_GPE0_BLK_LEN_V1 0x04 /* Compatibility definitions for the default location (version 0). */ #define ACPI_PM1A_EVT_BLK_ADDRESS ACPI_PM1A_EVT_BLK_ADDRESS_V0 #define ACPI_PM1A_CNT_BLK_ADDRESS ACPI_PM1A_CNT_BLK_ADDRESS_V0 #define ACPI_PM_TMR_BLK_ADDRESS ACPI_PM_TMR_BLK_ADDRESS_V0 #define ACPI_GPE0_BLK_ADDRESS ACPI_GPE0_BLK_ADDRESS_V0 #define ACPI_GPE0_BLK_LEN ACPI_GPE0_BLK_LEN_V0 #endif /* _IOREQ_H_ */ /* * Local variables: * mode: C * c-file-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */