#ifndef VFIO_H
#define VFIO_H
-#include <linux/types.h>
-#include <linux/ioctl.h>
-
-#define VFIO_API_VERSION 0
-
-#ifdef __KERNEL__ /* Internal VFIO-core/bus driver API */
#include <linux/iommu.h>
#include <linux/mm.h>
+#include <uapi/linux/vfio.h>
/**
* struct vfio_device_ops - VFIO bus driver device callbacks
TYPE tmp; \
offsetof(TYPE, MEMBER) + sizeof(tmp.MEMBER); }) \
-#endif /* __KERNEL__ */
-
-/* Kernel & User level defines for VFIO IOCTLs. */
-
-/* Extensions */
-
-#define VFIO_TYPE1_IOMMU 1
-
-/*
- * The IOCTL interface is designed for extensibility by embedding the
- * structure length (argsz) and flags into structures passed between
- * kernel and userspace. We therefore use the _IO() macro for these
- * defines to avoid implicitly embedding a size into the ioctl request.
- * As structure fields are added, argsz will increase to match and flag
- * bits will be defined to indicate additional fields with valid data.
- * It's *always* the caller's responsibility to indicate the size of
- * the structure passed by setting argsz appropriately.
- */
-
-#define VFIO_TYPE (';')
-#define VFIO_BASE 100
-
-/* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */
-
-/**
- * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0)
- *
- * Report the version of the VFIO API. This allows us to bump the entire
- * API version should we later need to add or change features in incompatible
- * ways.
- * Return: VFIO_API_VERSION
- * Availability: Always
- */
-#define VFIO_GET_API_VERSION _IO(VFIO_TYPE, VFIO_BASE + 0)
-
-/**
- * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32)
- *
- * Check whether an extension is supported.
- * Return: 0 if not supported, 1 (or some other positive integer) if supported.
- * Availability: Always
- */
-#define VFIO_CHECK_EXTENSION _IO(VFIO_TYPE, VFIO_BASE + 1)
-
-/**
- * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32)
- *
- * Set the iommu to the given type. The type must be supported by an
- * iommu driver as verified by calling CHECK_EXTENSION using the same
- * type. A group must be set to this file descriptor before this
- * ioctl is available. The IOMMU interfaces enabled by this call are
- * specific to the value set.
- * Return: 0 on success, -errno on failure
- * Availability: When VFIO group attached
- */
-#define VFIO_SET_IOMMU _IO(VFIO_TYPE, VFIO_BASE + 2)
-
-/* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */
-
-/**
- * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3,
- * struct vfio_group_status)
- *
- * Retrieve information about the group. Fills in provided
- * struct vfio_group_info. Caller sets argsz.
- * Return: 0 on succes, -errno on failure.
- * Availability: Always
- */
-struct vfio_group_status {
- __u32 argsz;
- __u32 flags;
-#define VFIO_GROUP_FLAGS_VIABLE (1 << 0)
-#define VFIO_GROUP_FLAGS_CONTAINER_SET (1 << 1)
-};
-#define VFIO_GROUP_GET_STATUS _IO(VFIO_TYPE, VFIO_BASE + 3)
-
-/**
- * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)
- *
- * Set the container for the VFIO group to the open VFIO file
- * descriptor provided. Groups may only belong to a single
- * container. Containers may, at their discretion, support multiple
- * groups. Only when a container is set are all of the interfaces
- * of the VFIO file descriptor and the VFIO group file descriptor
- * available to the user.
- * Return: 0 on success, -errno on failure.
- * Availability: Always
- */
-#define VFIO_GROUP_SET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 4)
-
-/**
- * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5)
- *
- * Remove the group from the attached container. This is the
- * opposite of the SET_CONTAINER call and returns the group to
- * an initial state. All device file descriptors must be released
- * prior to calling this interface. When removing the last group
- * from a container, the IOMMU will be disabled and all state lost,
- * effectively also returning the VFIO file descriptor to an initial
- * state.
- * Return: 0 on success, -errno on failure.
- * Availability: When attached to container
- */
-#define VFIO_GROUP_UNSET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 5)
-
-/**
- * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char)
- *
- * Return a new file descriptor for the device object described by
- * the provided string. The string should match a device listed in
- * the devices subdirectory of the IOMMU group sysfs entry. The
- * group containing the device must already be added to this context.
- * Return: new file descriptor on success, -errno on failure.
- * Availability: When attached to container
- */
-#define VFIO_GROUP_GET_DEVICE_FD _IO(VFIO_TYPE, VFIO_BASE + 6)
-
-/* --------------- IOCTLs for DEVICE file descriptors --------------- */
-
-/**
- * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7,
- * struct vfio_device_info)
- *
- * Retrieve information about the device. Fills in provided
- * struct vfio_device_info. Caller sets argsz.
- * Return: 0 on success, -errno on failure.
- */
-struct vfio_device_info {
- __u32 argsz;
- __u32 flags;
-#define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */
-#define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */
- __u32 num_regions; /* Max region index + 1 */
- __u32 num_irqs; /* Max IRQ index + 1 */
-};
-#define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7)
-
-/**
- * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
- * struct vfio_region_info)
- *
- * Retrieve information about a device region. Caller provides
- * struct vfio_region_info with index value set. Caller sets argsz.
- * Implementation of region mapping is bus driver specific. This is
- * intended to describe MMIO, I/O port, as well as bus specific
- * regions (ex. PCI config space). Zero sized regions may be used
- * to describe unimplemented regions (ex. unimplemented PCI BARs).
- * Return: 0 on success, -errno on failure.
- */
-struct vfio_region_info {
- __u32 argsz;
- __u32 flags;
-#define VFIO_REGION_INFO_FLAG_READ (1 << 0) /* Region supports read */
-#define VFIO_REGION_INFO_FLAG_WRITE (1 << 1) /* Region supports write */
-#define VFIO_REGION_INFO_FLAG_MMAP (1 << 2) /* Region supports mmap */
- __u32 index; /* Region index */
- __u32 resv; /* Reserved for alignment */
- __u64 size; /* Region size (bytes) */
- __u64 offset; /* Region offset from start of device fd */
-};
-#define VFIO_DEVICE_GET_REGION_INFO _IO(VFIO_TYPE, VFIO_BASE + 8)
-
-/**
- * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
- * struct vfio_irq_info)
- *
- * Retrieve information about a device IRQ. Caller provides
- * struct vfio_irq_info with index value set. Caller sets argsz.
- * Implementation of IRQ mapping is bus driver specific. Indexes
- * using multiple IRQs are primarily intended to support MSI-like
- * interrupt blocks. Zero count irq blocks may be used to describe
- * unimplemented interrupt types.
- *
- * The EVENTFD flag indicates the interrupt index supports eventfd based
- * signaling.
- *
- * The MASKABLE flags indicates the index supports MASK and UNMASK
- * actions described below.
- *
- * AUTOMASKED indicates that after signaling, the interrupt line is
- * automatically masked by VFIO and the user needs to unmask the line
- * to receive new interrupts. This is primarily intended to distinguish
- * level triggered interrupts.
- *
- * The NORESIZE flag indicates that the interrupt lines within the index
- * are setup as a set and new subindexes cannot be enabled without first
- * 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,
- VFIO_PCI_NUM_REGIONS
-};
-
-enum {
- VFIO_PCI_INTX_IRQ_INDEX,
- VFIO_PCI_MSI_IRQ_INDEX,
- VFIO_PCI_MSIX_IRQ_INDEX,
- VFIO_PCI_NUM_IRQS
-};
-
-/* -------- 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 */
- __u64 iova_pgsizes; /* Bitmap of supported page sizes */
-};
-
-#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 - _IOW(VFIO_TYPE, VFIO_BASE + 14, struct vfio_dma_unmap)
- *
- * Unmap IO virtual addresses using the provided struct vfio_dma_unmap.
- * Caller sets argsz.
- */
-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)
-
#endif /* VFIO_H */
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