964 lines
33 KiB
C
964 lines
33 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* VFIO API definition
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*
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* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
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* Author: Alex Williamson <alex.williamson@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _UAPIVFIO_H
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#define _UAPIVFIO_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#define VFIO_API_VERSION 0
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/* Kernel & User level defines for VFIO IOCTLs. */
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/* Extensions */
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#define VFIO_TYPE1_IOMMU 1
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#define VFIO_SPAPR_TCE_IOMMU 2
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#define VFIO_TYPE1v2_IOMMU 3
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/*
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* IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping). This
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* capability is subject to change as groups are added or removed.
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*/
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#define VFIO_DMA_CC_IOMMU 4
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/* Check if EEH is supported */
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#define VFIO_EEH 5
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/* Two-stage IOMMU */
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#define VFIO_TYPE1_NESTING_IOMMU 6 /* Implies v2 */
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#define VFIO_SPAPR_TCE_v2_IOMMU 7
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/*
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* The No-IOMMU IOMMU offers no translation or isolation for devices and
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* supports no ioctls outside of VFIO_CHECK_EXTENSION. Use of VFIO's No-IOMMU
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* code will taint the host kernel and should be used with extreme caution.
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*/
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#define VFIO_NOIOMMU_IOMMU 8
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/*
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* The IOCTL interface is designed for extensibility by embedding the
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* structure length (argsz) and flags into structures passed between
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* kernel and userspace. We therefore use the _IO() macro for these
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* defines to avoid implicitly embedding a size into the ioctl request.
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* As structure fields are added, argsz will increase to match and flag
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* bits will be defined to indicate additional fields with valid data.
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* It's *always* the caller's responsibility to indicate the size of
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* the structure passed by setting argsz appropriately.
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*/
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#define VFIO_TYPE (';')
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#define VFIO_BASE 100
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/*
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* For extension of INFO ioctls, VFIO makes use of a capability chain
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* designed after PCI/e capabilities. A flag bit indicates whether
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* this capability chain is supported and a field defined in the fixed
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* structure defines the offset of the first capability in the chain.
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* This field is only valid when the corresponding bit in the flags
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* bitmap is set. This offset field is relative to the start of the
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* INFO buffer, as is the next field within each capability header.
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* The id within the header is a shared address space per INFO ioctl,
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* while the version field is specific to the capability id. The
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* contents following the header are specific to the capability id.
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*/
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struct vfio_info_cap_header {
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__u16 id; /* Identifies capability */
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__u16 version; /* Version specific to the capability ID */
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__u32 next; /* Offset of next capability */
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};
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/*
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* Callers of INFO ioctls passing insufficiently sized buffers will see
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* the capability chain flag bit set, a zero value for the first capability
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* offset (if available within the provided argsz), and argsz will be
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* updated to report the necessary buffer size. For compatibility, the
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* INFO ioctl will not report error in this case, but the capability chain
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* will not be available.
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*/
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/* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */
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/**
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* VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0)
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*
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* Report the version of the VFIO API. This allows us to bump the entire
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* API version should we later need to add or change features in incompatible
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* ways.
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* Return: VFIO_API_VERSION
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* Availability: Always
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*/
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#define VFIO_GET_API_VERSION _IO(VFIO_TYPE, VFIO_BASE + 0)
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/**
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* VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32)
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*
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* Check whether an extension is supported.
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* Return: 0 if not supported, 1 (or some other positive integer) if supported.
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* Availability: Always
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*/
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#define VFIO_CHECK_EXTENSION _IO(VFIO_TYPE, VFIO_BASE + 1)
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/**
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* VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32)
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*
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* Set the iommu to the given type. The type must be supported by an
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* iommu driver as verified by calling CHECK_EXTENSION using the same
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* type. A group must be set to this file descriptor before this
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* ioctl is available. The IOMMU interfaces enabled by this call are
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* specific to the value set.
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* Return: 0 on success, -errno on failure
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* Availability: When VFIO group attached
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*/
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#define VFIO_SET_IOMMU _IO(VFIO_TYPE, VFIO_BASE + 2)
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/* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */
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/**
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* VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3,
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* struct vfio_group_status)
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*
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* Retrieve information about the group. Fills in provided
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* struct vfio_group_info. Caller sets argsz.
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* Return: 0 on succes, -errno on failure.
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* Availability: Always
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*/
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struct vfio_group_status {
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__u32 argsz;
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__u32 flags;
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#define VFIO_GROUP_FLAGS_VIABLE (1 << 0)
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#define VFIO_GROUP_FLAGS_CONTAINER_SET (1 << 1)
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};
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#define VFIO_GROUP_GET_STATUS _IO(VFIO_TYPE, VFIO_BASE + 3)
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/**
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* VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)
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*
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* Set the container for the VFIO group to the open VFIO file
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* descriptor provided. Groups may only belong to a single
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* container. Containers may, at their discretion, support multiple
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* groups. Only when a container is set are all of the interfaces
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* of the VFIO file descriptor and the VFIO group file descriptor
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* available to the user.
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* Return: 0 on success, -errno on failure.
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* Availability: Always
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*/
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#define VFIO_GROUP_SET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 4)
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/**
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* VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5)
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*
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* Remove the group from the attached container. This is the
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* opposite of the SET_CONTAINER call and returns the group to
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* an initial state. All device file descriptors must be released
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* prior to calling this interface. When removing the last group
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* from a container, the IOMMU will be disabled and all state lost,
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* effectively also returning the VFIO file descriptor to an initial
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* state.
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* Return: 0 on success, -errno on failure.
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* Availability: When attached to container
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*/
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#define VFIO_GROUP_UNSET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 5)
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/**
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* VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char)
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*
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* Return a new file descriptor for the device object described by
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* the provided string. The string should match a device listed in
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* the devices subdirectory of the IOMMU group sysfs entry. The
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* group containing the device must already be added to this context.
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* Return: new file descriptor on success, -errno on failure.
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* Availability: When attached to container
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*/
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#define VFIO_GROUP_GET_DEVICE_FD _IO(VFIO_TYPE, VFIO_BASE + 6)
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/* --------------- IOCTLs for DEVICE file descriptors --------------- */
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/**
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* VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7,
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* struct vfio_device_info)
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*
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* Retrieve information about the device. Fills in provided
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* struct vfio_device_info. Caller sets argsz.
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* Return: 0 on success, -errno on failure.
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*/
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struct vfio_device_info {
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__u32 argsz;
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__u32 flags;
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#define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */
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#define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */
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#define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */
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#define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
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#define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */
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#define VFIO_DEVICE_FLAGS_AP (1 << 5) /* vfio-ap device */
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__u32 num_regions; /* Max region index + 1 */
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__u32 num_irqs; /* Max IRQ index + 1 */
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};
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#define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7)
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/*
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* Vendor driver using Mediated device framework should provide device_api
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* attribute in supported type attribute groups. Device API string should be one
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* of the following corresponding to device flags in vfio_device_info structure.
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*/
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#define VFIO_DEVICE_API_PCI_STRING "vfio-pci"
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#define VFIO_DEVICE_API_PLATFORM_STRING "vfio-platform"
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#define VFIO_DEVICE_API_AMBA_STRING "vfio-amba"
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#define VFIO_DEVICE_API_CCW_STRING "vfio-ccw"
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#define VFIO_DEVICE_API_AP_STRING "vfio-ap"
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/**
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* VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
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* struct vfio_region_info)
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*
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* Retrieve information about a device region. Caller provides
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* struct vfio_region_info with index value set. Caller sets argsz.
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* Implementation of region mapping is bus driver specific. This is
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* intended to describe MMIO, I/O port, as well as bus specific
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* regions (ex. PCI config space). Zero sized regions may be used
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* to describe unimplemented regions (ex. unimplemented PCI BARs).
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* Return: 0 on success, -errno on failure.
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*/
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struct vfio_region_info {
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__u32 argsz;
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__u32 flags;
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#define VFIO_REGION_INFO_FLAG_READ (1 << 0) /* Region supports read */
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#define VFIO_REGION_INFO_FLAG_WRITE (1 << 1) /* Region supports write */
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#define VFIO_REGION_INFO_FLAG_MMAP (1 << 2) /* Region supports mmap */
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#define VFIO_REGION_INFO_FLAG_CAPS (1 << 3) /* Info supports caps */
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__u32 index; /* Region index */
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__u32 cap_offset; /* Offset within info struct of first cap */
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__u64 size; /* Region size (bytes) */
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__u64 offset; /* Region offset from start of device fd */
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};
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#define VFIO_DEVICE_GET_REGION_INFO _IO(VFIO_TYPE, VFIO_BASE + 8)
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/*
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* The sparse mmap capability allows finer granularity of specifying areas
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* within a region with mmap support. When specified, the user should only
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* mmap the offset ranges specified by the areas array. mmaps outside of the
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* areas specified may fail (such as the range covering a PCI MSI-X table) or
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* may result in improper device behavior.
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*
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* The structures below define version 1 of this capability.
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*/
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#define VFIO_REGION_INFO_CAP_SPARSE_MMAP 1
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struct vfio_region_sparse_mmap_area {
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__u64 offset; /* Offset of mmap'able area within region */
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__u64 size; /* Size of mmap'able area */
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};
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struct vfio_region_info_cap_sparse_mmap {
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struct vfio_info_cap_header header;
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__u32 nr_areas;
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__u32 reserved;
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struct vfio_region_sparse_mmap_area areas[];
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};
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/*
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* The device specific type capability allows regions unique to a specific
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* device or class of devices to be exposed. This helps solve the problem for
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* vfio bus drivers of defining which region indexes correspond to which region
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* on the device, without needing to resort to static indexes, as done by
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* vfio-pci. For instance, if we were to go back in time, we might remove
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* VFIO_PCI_VGA_REGION_INDEX and let vfio-pci simply define that all indexes
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* greater than or equal to VFIO_PCI_NUM_REGIONS are device specific and we'd
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* make a "VGA" device specific type to describe the VGA access space. This
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* means that non-VGA devices wouldn't need to waste this index, and thus the
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* address space associated with it due to implementation of device file
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* descriptor offsets in vfio-pci.
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*
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* The current implementation is now part of the user ABI, so we can't use this
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* for VGA, but there are other upcoming use cases, such as opregions for Intel
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* IGD devices and framebuffers for vGPU devices. We missed VGA, but we'll
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* use this for future additions.
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*
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* The structure below defines version 1 of this capability.
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*/
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#define VFIO_REGION_INFO_CAP_TYPE 2
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struct vfio_region_info_cap_type {
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struct vfio_info_cap_header header;
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__u32 type; /* global per bus driver */
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__u32 subtype; /* type specific */
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};
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/*
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* List of region types, global per bus driver.
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* If you introduce a new type, please add it here.
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*/
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/* PCI region type containing a PCI vendor part */
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#define VFIO_REGION_TYPE_PCI_VENDOR_TYPE (1 << 31)
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#define VFIO_REGION_TYPE_PCI_VENDOR_MASK (0xffff)
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#define VFIO_REGION_TYPE_GFX (1)
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#define VFIO_REGION_TYPE_CCW (2)
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/* sub-types for VFIO_REGION_TYPE_PCI_* */
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/* 8086 vendor PCI sub-types */
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#define VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION (1)
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#define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2)
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#define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3)
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/* 10de vendor PCI sub-types */
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/*
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* NVIDIA GPU NVlink2 RAM is coherent RAM mapped onto the host address space.
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*/
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#define VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM (1)
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/* 1014 vendor PCI sub-types */
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/*
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* IBM NPU NVlink2 ATSD (Address Translation Shootdown) register of NPU
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* to do TLB invalidation on a GPU.
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*/
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#define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD (1)
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/* sub-types for VFIO_REGION_TYPE_GFX */
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#define VFIO_REGION_SUBTYPE_GFX_EDID (1)
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/**
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* struct vfio_region_gfx_edid - EDID region layout.
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*
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* Set display link state and EDID blob.
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*
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* The EDID blob has monitor information such as brand, name, serial
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* number, physical size, supported video modes and more.
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*
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* This special region allows userspace (typically qemu) set a virtual
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* EDID for the virtual monitor, which allows a flexible display
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* configuration.
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*
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* For the edid blob spec look here:
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* https://en.wikipedia.org/wiki/Extended_Display_Identification_Data
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*
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* On linux systems you can find the EDID blob in sysfs:
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* /sys/class/drm/${card}/${connector}/edid
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*
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* You can use the edid-decode ulility (comes with xorg-x11-utils) to
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* decode the EDID blob.
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*
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* @edid_offset: location of the edid blob, relative to the
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* start of the region (readonly).
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* @edid_max_size: max size of the edid blob (readonly).
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* @edid_size: actual edid size (read/write).
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* @link_state: display link state (read/write).
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* VFIO_DEVICE_GFX_LINK_STATE_UP: Monitor is turned on.
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* VFIO_DEVICE_GFX_LINK_STATE_DOWN: Monitor is turned off.
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* @max_xres: max display width (0 == no limitation, readonly).
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* @max_yres: max display height (0 == no limitation, readonly).
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*
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* EDID update protocol:
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* (1) set link-state to down.
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* (2) update edid blob and size.
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* (3) set link-state to up.
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*/
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struct vfio_region_gfx_edid {
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__u32 edid_offset;
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__u32 edid_max_size;
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__u32 edid_size;
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__u32 max_xres;
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__u32 max_yres;
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__u32 link_state;
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#define VFIO_DEVICE_GFX_LINK_STATE_UP 1
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#define VFIO_DEVICE_GFX_LINK_STATE_DOWN 2
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};
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/* sub-types for VFIO_REGION_TYPE_CCW */
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#define VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD (1)
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/*
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* The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
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* which allows direct access to non-MSIX registers which happened to be within
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* the same system page.
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*
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* Even though the userspace gets direct access to the MSIX data, the existing
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* VFIO_DEVICE_SET_IRQS interface must still be used for MSIX configuration.
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*/
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#define VFIO_REGION_INFO_CAP_MSIX_MAPPABLE 3
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/*
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* Capability with compressed real address (aka SSA - small system address)
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* where GPU RAM is mapped on a system bus. Used by a GPU for DMA routing
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* and by the userspace to associate a NVLink bridge with a GPU.
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*/
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#define VFIO_REGION_INFO_CAP_NVLINK2_SSATGT 4
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struct vfio_region_info_cap_nvlink2_ssatgt {
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struct vfio_info_cap_header header;
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__u64 tgt;
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};
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/*
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* Capability with an NVLink link speed. The value is read by
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* the NVlink2 bridge driver from the bridge's "ibm,nvlink-speed"
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* property in the device tree. The value is fixed in the hardware
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* and failing to provide the correct value results in the link
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* not working with no indication from the driver why.
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*/
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#define VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD 5
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struct vfio_region_info_cap_nvlink2_lnkspd {
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struct vfio_info_cap_header header;
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__u32 link_speed;
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__u32 __pad;
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};
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/**
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* VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
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* struct vfio_irq_info)
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*
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* Retrieve information about a device IRQ. Caller provides
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* struct vfio_irq_info with index value set. Caller sets argsz.
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* Implementation of IRQ mapping is bus driver specific. Indexes
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* using multiple IRQs are primarily intended to support MSI-like
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* interrupt blocks. Zero count irq blocks may be used to describe
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* unimplemented interrupt types.
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*
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* The EVENTFD flag indicates the interrupt index supports eventfd based
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* signaling.
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*
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* The MASKABLE flags indicates the index supports MASK and UNMASK
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* actions described below.
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*
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* AUTOMASKED indicates that after signaling, the interrupt line is
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* automatically masked by VFIO and the user needs to unmask the line
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* to receive new interrupts. This is primarily intended to distinguish
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* level triggered interrupts.
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*
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* The NORESIZE flag indicates that the interrupt lines within the index
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* are setup as a set and new subindexes cannot be enabled without first
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* disabling the entire index. This is used for interrupts like PCI MSI
|
|
* and MSI-X where the driver may only use a subset of the available
|
|
* indexes, but VFIO needs to enable a specific number of vectors
|
|
* upfront. In the case of MSI-X, where the user can enable MSI-X and
|
|
* then add and unmask vectors, it's up to userspace to make the decision
|
|
* whether to allocate the maximum supported number of vectors or tear
|
|
* down setup and incrementally increase the vectors as each is enabled.
|
|
*/
|
|
struct vfio_irq_info {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_IRQ_INFO_EVENTFD (1 << 0)
|
|
#define VFIO_IRQ_INFO_MASKABLE (1 << 1)
|
|
#define VFIO_IRQ_INFO_AUTOMASKED (1 << 2)
|
|
#define VFIO_IRQ_INFO_NORESIZE (1 << 3)
|
|
__u32 index; /* IRQ index */
|
|
__u32 count; /* Number of IRQs within this index */
|
|
};
|
|
#define VFIO_DEVICE_GET_IRQ_INFO _IO(VFIO_TYPE, VFIO_BASE + 9)
|
|
|
|
/**
|
|
* VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set)
|
|
*
|
|
* Set signaling, masking, and unmasking of interrupts. Caller provides
|
|
* struct vfio_irq_set with all fields set. 'start' and 'count' indicate
|
|
* the range of subindexes being specified.
|
|
*
|
|
* The DATA flags specify the type of data provided. If DATA_NONE, the
|
|
* operation performs the specified action immediately on the specified
|
|
* interrupt(s). For example, to unmask AUTOMASKED interrupt [0,0]:
|
|
* flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1.
|
|
*
|
|
* DATA_BOOL allows sparse support for the same on arrays of interrupts.
|
|
* For example, to mask interrupts [0,1] and [0,3] (but not [0,2]):
|
|
* flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3,
|
|
* data = {1,0,1}
|
|
*
|
|
* DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd.
|
|
* A value of -1 can be used to either de-assign interrupts if already
|
|
* assigned or skip un-assigned interrupts. For example, to set an eventfd
|
|
* to be trigger for interrupts [0,0] and [0,2]:
|
|
* flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3,
|
|
* data = {fd1, -1, fd2}
|
|
* If index [0,1] is previously set, two count = 1 ioctls calls would be
|
|
* required to set [0,0] and [0,2] without changing [0,1].
|
|
*
|
|
* Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used
|
|
* with ACTION_TRIGGER to perform kernel level interrupt loopback testing
|
|
* from userspace (ie. simulate hardware triggering).
|
|
*
|
|
* Setting of an event triggering mechanism to userspace for ACTION_TRIGGER
|
|
* enables the interrupt index for the device. Individual subindex interrupts
|
|
* can be disabled using the -1 value for DATA_EVENTFD or the index can be
|
|
* disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0.
|
|
*
|
|
* Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while
|
|
* ACTION_TRIGGER specifies kernel->user signaling.
|
|
*/
|
|
struct vfio_irq_set {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_IRQ_SET_DATA_NONE (1 << 0) /* Data not present */
|
|
#define VFIO_IRQ_SET_DATA_BOOL (1 << 1) /* Data is bool (u8) */
|
|
#define VFIO_IRQ_SET_DATA_EVENTFD (1 << 2) /* Data is eventfd (s32) */
|
|
#define VFIO_IRQ_SET_ACTION_MASK (1 << 3) /* Mask interrupt */
|
|
#define VFIO_IRQ_SET_ACTION_UNMASK (1 << 4) /* Unmask interrupt */
|
|
#define VFIO_IRQ_SET_ACTION_TRIGGER (1 << 5) /* Trigger interrupt */
|
|
__u32 index;
|
|
__u32 start;
|
|
__u32 count;
|
|
__u8 data[];
|
|
};
|
|
#define VFIO_DEVICE_SET_IRQS _IO(VFIO_TYPE, VFIO_BASE + 10)
|
|
|
|
#define VFIO_IRQ_SET_DATA_TYPE_MASK (VFIO_IRQ_SET_DATA_NONE | \
|
|
VFIO_IRQ_SET_DATA_BOOL | \
|
|
VFIO_IRQ_SET_DATA_EVENTFD)
|
|
#define VFIO_IRQ_SET_ACTION_TYPE_MASK (VFIO_IRQ_SET_ACTION_MASK | \
|
|
VFIO_IRQ_SET_ACTION_UNMASK | \
|
|
VFIO_IRQ_SET_ACTION_TRIGGER)
|
|
/**
|
|
* VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11)
|
|
*
|
|
* Reset a device.
|
|
*/
|
|
#define VFIO_DEVICE_RESET _IO(VFIO_TYPE, VFIO_BASE + 11)
|
|
|
|
/*
|
|
* The VFIO-PCI bus driver makes use of the following fixed region and
|
|
* IRQ index mapping. Unimplemented regions return a size of zero.
|
|
* Unimplemented IRQ types return a count of zero.
|
|
*/
|
|
|
|
enum {
|
|
VFIO_PCI_BAR0_REGION_INDEX,
|
|
VFIO_PCI_BAR1_REGION_INDEX,
|
|
VFIO_PCI_BAR2_REGION_INDEX,
|
|
VFIO_PCI_BAR3_REGION_INDEX,
|
|
VFIO_PCI_BAR4_REGION_INDEX,
|
|
VFIO_PCI_BAR5_REGION_INDEX,
|
|
VFIO_PCI_ROM_REGION_INDEX,
|
|
VFIO_PCI_CONFIG_REGION_INDEX,
|
|
/*
|
|
* Expose VGA regions defined for PCI base class 03, subclass 00.
|
|
* This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df
|
|
* as well as the MMIO range 0xa0000 to 0xbffff. Each implemented
|
|
* range is found at it's identity mapped offset from the region
|
|
* offset, for example 0x3b0 is region_info.offset + 0x3b0. Areas
|
|
* between described ranges are unimplemented.
|
|
*/
|
|
VFIO_PCI_VGA_REGION_INDEX,
|
|
VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */
|
|
/* device specific cap to define content. */
|
|
};
|
|
|
|
enum {
|
|
VFIO_PCI_INTX_IRQ_INDEX,
|
|
VFIO_PCI_MSI_IRQ_INDEX,
|
|
VFIO_PCI_MSIX_IRQ_INDEX,
|
|
VFIO_PCI_ERR_IRQ_INDEX,
|
|
VFIO_PCI_REQ_IRQ_INDEX,
|
|
VFIO_PCI_NUM_IRQS
|
|
};
|
|
|
|
/*
|
|
* The vfio-ccw bus driver makes use of the following fixed region and
|
|
* IRQ index mapping. Unimplemented regions return a size of zero.
|
|
* Unimplemented IRQ types return a count of zero.
|
|
*/
|
|
|
|
enum {
|
|
VFIO_CCW_CONFIG_REGION_INDEX,
|
|
VFIO_CCW_NUM_REGIONS
|
|
};
|
|
|
|
enum {
|
|
VFIO_CCW_IO_IRQ_INDEX,
|
|
VFIO_CCW_NUM_IRQS
|
|
};
|
|
|
|
/**
|
|
* VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12,
|
|
* struct vfio_pci_hot_reset_info)
|
|
*
|
|
* Return: 0 on success, -errno on failure:
|
|
* -enospc = insufficient buffer, -enodev = unsupported for device.
|
|
*/
|
|
struct vfio_pci_dependent_device {
|
|
__u32 group_id;
|
|
__u16 segment;
|
|
__u8 bus;
|
|
__u8 devfn; /* Use PCI_SLOT/PCI_FUNC */
|
|
};
|
|
|
|
struct vfio_pci_hot_reset_info {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
__u32 count;
|
|
struct vfio_pci_dependent_device devices[];
|
|
};
|
|
|
|
#define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
|
|
|
|
/**
|
|
* VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13,
|
|
* struct vfio_pci_hot_reset)
|
|
*
|
|
* Return: 0 on success, -errno on failure.
|
|
*/
|
|
struct vfio_pci_hot_reset {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
__u32 count;
|
|
__s32 group_fds[];
|
|
};
|
|
|
|
#define VFIO_DEVICE_PCI_HOT_RESET _IO(VFIO_TYPE, VFIO_BASE + 13)
|
|
|
|
/**
|
|
* VFIO_DEVICE_QUERY_GFX_PLANE - _IOW(VFIO_TYPE, VFIO_BASE + 14,
|
|
* struct vfio_device_query_gfx_plane)
|
|
*
|
|
* Set the drm_plane_type and flags, then retrieve the gfx plane info.
|
|
*
|
|
* flags supported:
|
|
* - VFIO_GFX_PLANE_TYPE_PROBE and VFIO_GFX_PLANE_TYPE_DMABUF are set
|
|
* to ask if the mdev supports dma-buf. 0 on support, -EINVAL on no
|
|
* support for dma-buf.
|
|
* - VFIO_GFX_PLANE_TYPE_PROBE and VFIO_GFX_PLANE_TYPE_REGION are set
|
|
* to ask if the mdev supports region. 0 on support, -EINVAL on no
|
|
* support for region.
|
|
* - VFIO_GFX_PLANE_TYPE_DMABUF or VFIO_GFX_PLANE_TYPE_REGION is set
|
|
* with each call to query the plane info.
|
|
* - Others are invalid and return -EINVAL.
|
|
*
|
|
* Note:
|
|
* 1. Plane could be disabled by guest. In that case, success will be
|
|
* returned with zero-initialized drm_format, size, width and height
|
|
* fields.
|
|
* 2. x_hot/y_hot is set to 0xFFFFFFFF if no hotspot information available
|
|
*
|
|
* Return: 0 on success, -errno on other failure.
|
|
*/
|
|
struct vfio_device_gfx_plane_info {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_GFX_PLANE_TYPE_PROBE (1 << 0)
|
|
#define VFIO_GFX_PLANE_TYPE_DMABUF (1 << 1)
|
|
#define VFIO_GFX_PLANE_TYPE_REGION (1 << 2)
|
|
/* in */
|
|
__u32 drm_plane_type; /* type of plane: DRM_PLANE_TYPE_* */
|
|
/* out */
|
|
__u32 drm_format; /* drm format of plane */
|
|
__u64 drm_format_mod; /* tiled mode */
|
|
__u32 width; /* width of plane */
|
|
__u32 height; /* height of plane */
|
|
__u32 stride; /* stride of plane */
|
|
__u32 size; /* size of plane in bytes, align on page*/
|
|
__u32 x_pos; /* horizontal position of cursor plane */
|
|
__u32 y_pos; /* vertical position of cursor plane*/
|
|
__u32 x_hot; /* horizontal position of cursor hotspot */
|
|
__u32 y_hot; /* vertical position of cursor hotspot */
|
|
union {
|
|
__u32 region_index; /* region index */
|
|
__u32 dmabuf_id; /* dma-buf id */
|
|
};
|
|
};
|
|
|
|
#define VFIO_DEVICE_QUERY_GFX_PLANE _IO(VFIO_TYPE, VFIO_BASE + 14)
|
|
|
|
/**
|
|
* VFIO_DEVICE_GET_GFX_DMABUF - _IOW(VFIO_TYPE, VFIO_BASE + 15, __u32)
|
|
*
|
|
* Return a new dma-buf file descriptor for an exposed guest framebuffer
|
|
* described by the provided dmabuf_id. The dmabuf_id is returned from VFIO_
|
|
* DEVICE_QUERY_GFX_PLANE as a token of the exposed guest framebuffer.
|
|
*/
|
|
|
|
#define VFIO_DEVICE_GET_GFX_DMABUF _IO(VFIO_TYPE, VFIO_BASE + 15)
|
|
|
|
/**
|
|
* VFIO_DEVICE_IOEVENTFD - _IOW(VFIO_TYPE, VFIO_BASE + 16,
|
|
* struct vfio_device_ioeventfd)
|
|
*
|
|
* Perform a write to the device at the specified device fd offset, with
|
|
* the specified data and width when the provided eventfd is triggered.
|
|
* vfio bus drivers may not support this for all regions, for all widths,
|
|
* or at all. vfio-pci currently only enables support for BAR regions,
|
|
* excluding the MSI-X vector table.
|
|
*
|
|
* Return: 0 on success, -errno on failure.
|
|
*/
|
|
struct vfio_device_ioeventfd {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_DEVICE_IOEVENTFD_8 (1 << 0) /* 1-byte write */
|
|
#define VFIO_DEVICE_IOEVENTFD_16 (1 << 1) /* 2-byte write */
|
|
#define VFIO_DEVICE_IOEVENTFD_32 (1 << 2) /* 4-byte write */
|
|
#define VFIO_DEVICE_IOEVENTFD_64 (1 << 3) /* 8-byte write */
|
|
#define VFIO_DEVICE_IOEVENTFD_SIZE_MASK (0xf)
|
|
__u64 offset; /* device fd offset of write */
|
|
__u64 data; /* data to be written */
|
|
__s32 fd; /* -1 for de-assignment */
|
|
};
|
|
|
|
#define VFIO_DEVICE_IOEVENTFD _IO(VFIO_TYPE, VFIO_BASE + 16)
|
|
|
|
/* -------- API for Type1 VFIO IOMMU -------- */
|
|
|
|
/**
|
|
* VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info)
|
|
*
|
|
* Retrieve information about the IOMMU object. Fills in provided
|
|
* struct vfio_iommu_info. Caller sets argsz.
|
|
*
|
|
* XXX Should we do these by CHECK_EXTENSION too?
|
|
*/
|
|
struct vfio_iommu_type1_info {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */
|
|
#define VFIO_IOMMU_INFO_CAPS (1 << 1) /* Info supports caps */
|
|
__u64 iova_pgsizes; /* Bitmap of supported page sizes */
|
|
__u32 cap_offset; /* Offset within info struct of first cap */
|
|
};
|
|
|
|
/*
|
|
* The IOVA capability allows to report the valid IOVA range(s)
|
|
* excluding any non-relaxable reserved regions exposed by
|
|
* devices attached to the container. Any DMA map attempt
|
|
* outside the valid iova range will return error.
|
|
*
|
|
* The structures below define version 1 of this capability.
|
|
*/
|
|
#define VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE 1
|
|
|
|
struct vfio_iova_range {
|
|
__u64 start;
|
|
__u64 end;
|
|
};
|
|
|
|
struct vfio_iommu_type1_info_cap_iova_range {
|
|
struct vfio_info_cap_header header;
|
|
__u32 nr_iovas;
|
|
__u32 reserved;
|
|
struct vfio_iova_range iova_ranges[];
|
|
};
|
|
|
|
/*
|
|
* The DMA available capability allows to report the current number of
|
|
* simultaneously outstanding DMA mappings that are allowed.
|
|
*
|
|
* The structure below defines version 1 of this capability.
|
|
*
|
|
* avail: specifies the current number of outstanding DMA mappings allowed.
|
|
*/
|
|
#define VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL 3
|
|
|
|
struct vfio_iommu_type1_info_dma_avail {
|
|
struct vfio_info_cap_header header;
|
|
__u32 avail;
|
|
};
|
|
|
|
#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
|
|
|
|
/**
|
|
* VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map)
|
|
*
|
|
* Map process virtual addresses to IO virtual addresses using the
|
|
* provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required.
|
|
*/
|
|
struct vfio_iommu_type1_dma_map {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device */
|
|
#define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */
|
|
__u64 vaddr; /* Process virtual address */
|
|
__u64 iova; /* IO virtual address */
|
|
__u64 size; /* Size of mapping (bytes) */
|
|
};
|
|
|
|
#define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13)
|
|
|
|
/**
|
|
* VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14,
|
|
* struct vfio_dma_unmap)
|
|
*
|
|
* Unmap IO virtual addresses using the provided struct vfio_dma_unmap.
|
|
* Caller sets argsz. The actual unmapped size is returned in the size
|
|
* field. No guarantee is made to the user that arbitrary unmaps of iova
|
|
* or size different from those used in the original mapping call will
|
|
* succeed.
|
|
*/
|
|
struct vfio_iommu_type1_dma_unmap {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
__u64 iova; /* IO virtual address */
|
|
__u64 size; /* Size of mapping (bytes) */
|
|
};
|
|
|
|
#define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14)
|
|
|
|
/*
|
|
* IOCTLs to enable/disable IOMMU container usage.
|
|
* No parameters are supported.
|
|
*/
|
|
#define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15)
|
|
#define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16)
|
|
|
|
/* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
|
|
|
|
/*
|
|
* The SPAPR TCE DDW info struct provides the information about
|
|
* the details of Dynamic DMA window capability.
|
|
*
|
|
* @pgsizes contains a page size bitmask, 4K/64K/16M are supported.
|
|
* @max_dynamic_windows_supported tells the maximum number of windows
|
|
* which the platform can create.
|
|
* @levels tells the maximum number of levels in multi-level IOMMU tables;
|
|
* this allows splitting a table into smaller chunks which reduces
|
|
* the amount of physically contiguous memory required for the table.
|
|
*/
|
|
struct vfio_iommu_spapr_tce_ddw_info {
|
|
__u64 pgsizes; /* Bitmap of supported page sizes */
|
|
__u32 max_dynamic_windows_supported;
|
|
__u32 levels;
|
|
};
|
|
|
|
/*
|
|
* The SPAPR TCE info struct provides the information about the PCI bus
|
|
* address ranges available for DMA, these values are programmed into
|
|
* the hardware so the guest has to know that information.
|
|
*
|
|
* The DMA 32 bit window start is an absolute PCI bus address.
|
|
* The IOVA address passed via map/unmap ioctls are absolute PCI bus
|
|
* addresses too so the window works as a filter rather than an offset
|
|
* for IOVA addresses.
|
|
*
|
|
* Flags supported:
|
|
* - VFIO_IOMMU_SPAPR_INFO_DDW: informs the userspace that dynamic DMA windows
|
|
* (DDW) support is present. @ddw is only supported when DDW is present.
|
|
*/
|
|
struct vfio_iommu_spapr_tce_info {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
#define VFIO_IOMMU_SPAPR_INFO_DDW (1 << 0) /* DDW supported */
|
|
__u32 dma32_window_start; /* 32 bit window start (bytes) */
|
|
__u32 dma32_window_size; /* 32 bit window size (bytes) */
|
|
struct vfio_iommu_spapr_tce_ddw_info ddw;
|
|
};
|
|
|
|
#define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
|
|
|
|
/*
|
|
* EEH PE operation struct provides ways to:
|
|
* - enable/disable EEH functionality;
|
|
* - unfreeze IO/DMA for frozen PE;
|
|
* - read PE state;
|
|
* - reset PE;
|
|
* - configure PE;
|
|
* - inject EEH error.
|
|
*/
|
|
struct vfio_eeh_pe_err {
|
|
__u32 type;
|
|
__u32 func;
|
|
__u64 addr;
|
|
__u64 mask;
|
|
};
|
|
|
|
struct vfio_eeh_pe_op {
|
|
__u32 argsz;
|
|
__u32 flags;
|
|
__u32 op;
|
|
union {
|
|
struct vfio_eeh_pe_err err;
|
|
};
|
|
};
|
|
|
|
#define VFIO_EEH_PE_DISABLE 0 /* Disable EEH functionality */
|
|
#define VFIO_EEH_PE_ENABLE 1 /* Enable EEH functionality */
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#define VFIO_EEH_PE_UNFREEZE_IO 2 /* Enable IO for frozen PE */
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#define VFIO_EEH_PE_UNFREEZE_DMA 3 /* Enable DMA for frozen PE */
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#define VFIO_EEH_PE_GET_STATE 4 /* PE state retrieval */
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#define VFIO_EEH_PE_STATE_NORMAL 0 /* PE in functional state */
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#define VFIO_EEH_PE_STATE_RESET 1 /* PE reset in progress */
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#define VFIO_EEH_PE_STATE_STOPPED 2 /* Stopped DMA and IO */
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#define VFIO_EEH_PE_STATE_STOPPED_DMA 4 /* Stopped DMA only */
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#define VFIO_EEH_PE_STATE_UNAVAIL 5 /* State unavailable */
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#define VFIO_EEH_PE_RESET_DEACTIVATE 5 /* Deassert PE reset */
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#define VFIO_EEH_PE_RESET_HOT 6 /* Assert hot reset */
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#define VFIO_EEH_PE_RESET_FUNDAMENTAL 7 /* Assert fundamental reset */
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#define VFIO_EEH_PE_CONFIGURE 8 /* PE configuration */
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#define VFIO_EEH_PE_INJECT_ERR 9 /* Inject EEH error */
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#define VFIO_EEH_PE_OP _IO(VFIO_TYPE, VFIO_BASE + 21)
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/**
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* VFIO_IOMMU_SPAPR_REGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 17, struct vfio_iommu_spapr_register_memory)
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*
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* Registers user space memory where DMA is allowed. It pins
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* user pages and does the locked memory accounting so
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* subsequent VFIO_IOMMU_MAP_DMA/VFIO_IOMMU_UNMAP_DMA calls
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* get faster.
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*/
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struct vfio_iommu_spapr_register_memory {
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__u32 argsz;
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__u32 flags;
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__u64 vaddr; /* Process virtual address */
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__u64 size; /* Size of mapping (bytes) */
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};
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#define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17)
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/**
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* VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 18, struct vfio_iommu_spapr_register_memory)
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*
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* Unregisters user space memory registered with
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* VFIO_IOMMU_SPAPR_REGISTER_MEMORY.
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* Uses vfio_iommu_spapr_register_memory for parameters.
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*/
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#define VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 18)
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/**
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* VFIO_IOMMU_SPAPR_TCE_CREATE - _IOWR(VFIO_TYPE, VFIO_BASE + 19, struct vfio_iommu_spapr_tce_create)
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*
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* Creates an additional TCE table and programs it (sets a new DMA window)
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* to every IOMMU group in the container. It receives page shift, window
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* size and number of levels in the TCE table being created.
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*
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* It allocates and returns an offset on a PCI bus of the new DMA window.
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*/
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struct vfio_iommu_spapr_tce_create {
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__u32 argsz;
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__u32 flags;
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/* in */
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__u32 page_shift;
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__u32 __resv1;
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__u64 window_size;
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__u32 levels;
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__u32 __resv2;
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/* out */
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__u64 start_addr;
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};
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#define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19)
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/**
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* VFIO_IOMMU_SPAPR_TCE_REMOVE - _IOW(VFIO_TYPE, VFIO_BASE + 20, struct vfio_iommu_spapr_tce_remove)
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*
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* Unprograms a TCE table from all groups in the container and destroys it.
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* It receives a PCI bus offset as a window id.
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*/
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struct vfio_iommu_spapr_tce_remove {
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__u32 argsz;
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__u32 flags;
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/* in */
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__u64 start_addr;
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};
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#define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20)
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/* ***************************************************************** */
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#endif /* _UAPIVFIO_H */
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