[Qemu-devel] [PATCH v6 2/4] Update Linux kernel headers

[Alex Williamson]

Based on Linux as of 1a95620.

Signed-off-by: Alex Williamson <address@hidden>
Acked-by: Michael S. Tsirkin <address@hidden>
---

 linux-headers/linux/vfio.h |  368 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 368 insertions(+)
 create mode 100644 linux-headers/linux/vfio.h

diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h
new file mode 100644
index 0000000..f787b72
--- /dev/null
+++ b/linux-headers/linux/vfio.h
@@ -0,0 +1,368 @@
+/*
+ * VFIO API definition
+ *
+ * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
+ *     Author: Alex Williamson <address@hidden>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef VFIO_H
+#define VFIO_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define VFIO_API_VERSION       0
+
+
+/* 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 */