linux-headers/linux/vfio.h

   1 /*
   2  * VFIO API definition
   3  *
   4  * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
   5  *     Author: Alex Williamson <alex.williamson@redhat.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #ifndef VFIO_H
  12 #define VFIO_H
  13
  14 #include <linux/types.h>
  15 #include <linux/ioctl.h>
  16
  17 #define VFIO_API_VERSION        0
  18
  19
  20 /* Kernel & User level defines for VFIO IOCTLs. */
  21
  22 /* Extensions */
  23
  24 #define VFIO_TYPE1_IOMMU                1
  25 #define VFIO_SPAPR_TCE_IOMMU            2
  26 #define VFIO_TYPE1v2_IOMMU              3
  27 /*
  28  * IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping).  This
  29  * capability is subject to change as groups are added or removed.
  30  */
  31 #define VFIO_DMA_CC_IOMMU               4
  32
  33 /* Check if EEH is supported */
  34 #define VFIO_EEH                        5
  35
  36 /* Two-stage IOMMU */
  37 #define VFIO_TYPE1_NESTING_IOMMU        6       /* Implies v2 */
  38
  39 /*
  40  * The IOCTL interface is designed for extensibility by embedding the
  41  * structure length (argsz) and flags into structures passed between
  42  * kernel and userspace.  We therefore use the _IO() macro for these
  43  * defines to avoid implicitly embedding a size into the ioctl request.
  44  * As structure fields are added, argsz will increase to match and flag
  45  * bits will be defined to indicate additional fields with valid data.
  46  * It's *always* the caller's responsibility to indicate the size of
  47  * the structure passed by setting argsz appropriately.
  48  */
  49
  50 #define VFIO_TYPE       (';')
  51 #define VFIO_BASE       100
  52
  53 /* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */
  54
  55 /**
  56  * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0)
  57  *
  58  * Report the version of the VFIO API.  This allows us to bump the entire
  59  * API version should we later need to add or change features in incompatible
  60  * ways.
  61  * Return: VFIO_API_VERSION
  62  * Availability: Always
  63  */
  64 #define VFIO_GET_API_VERSION            _IO(VFIO_TYPE, VFIO_BASE + 0)
  65
  66 /**
  67  * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32)
  68  *
  69  * Check whether an extension is supported.
  70  * Return: 0 if not supported, 1 (or some other positive integer) if supported.
  71  * Availability: Always
  72  */
  73 #define VFIO_CHECK_EXTENSION            _IO(VFIO_TYPE, VFIO_BASE + 1)
  74
  75 /**
  76  * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32)
  77  *
  78  * Set the iommu to the given type.  The type must be supported by an
  79  * iommu driver as verified by calling CHECK_EXTENSION using the same
  80  * type.  A group must be set to this file descriptor before this
  81  * ioctl is available.  The IOMMU interfaces enabled by this call are
  82  * specific to the value set.
  83  * Return: 0 on success, -errno on failure
  84  * Availability: When VFIO group attached
  85  */
  86 #define VFIO_SET_IOMMU                  _IO(VFIO_TYPE, VFIO_BASE + 2)
  87
  88 /* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */
  89
  90 /**
  91  * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3,
  92  *                                              struct vfio_group_status)
  93  *
  94  * Retrieve information about the group.  Fills in provided
  95  * struct vfio_group_info.  Caller sets argsz.
  96  * Return: 0 on succes, -errno on failure.
  97  * Availability: Always
  98  */
  99 struct vfio_group_status {
 100         __u32   argsz;
 101         __u32   flags;
 102 #define VFIO_GROUP_FLAGS_VIABLE         (1 << 0)
 103 #define VFIO_GROUP_FLAGS_CONTAINER_SET  (1 << 1)
 104 };
 105 #define VFIO_GROUP_GET_STATUS           _IO(VFIO_TYPE, VFIO_BASE + 3)
 106
 107 /**
 108  * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)
 109  *
 110  * Set the container for the VFIO group to the open VFIO file
 111  * descriptor provided.  Groups may only belong to a single
 112  * container.  Containers may, at their discretion, support multiple
 113  * groups.  Only when a container is set are all of the interfaces
 114  * of the VFIO file descriptor and the VFIO group file descriptor
 115  * available to the user.
 116  * Return: 0 on success, -errno on failure.
 117  * Availability: Always
 118  */
 119 #define VFIO_GROUP_SET_CONTAINER        _IO(VFIO_TYPE, VFIO_BASE + 4)
 120
 121 /**
 122  * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5)
 123  *
 124  * Remove the group from the attached container.  This is the
 125  * opposite of the SET_CONTAINER call and returns the group to
 126  * an initial state.  All device file descriptors must be released
 127  * prior to calling this interface.  When removing the last group
 128  * from a container, the IOMMU will be disabled and all state lost,
 129  * effectively also returning the VFIO file descriptor to an initial
 130  * state.
 131  * Return: 0 on success, -errno on failure.
 132  * Availability: When attached to container
 133  */
 134 #define VFIO_GROUP_UNSET_CONTAINER      _IO(VFIO_TYPE, VFIO_BASE + 5)
 135
 136 /**
 137  * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char)
 138  *
 139  * Return a new file descriptor for the device object described by
 140  * the provided string.  The string should match a device listed in
 141  * the devices subdirectory of the IOMMU group sysfs entry.  The
 142  * group containing the device must already be added to this context.
 143  * Return: new file descriptor on success, -errno on failure.
 144  * Availability: When attached to container
 145  */
 146 #define VFIO_GROUP_GET_DEVICE_FD        _IO(VFIO_TYPE, VFIO_BASE + 6)
 147
 148 /* --------------- IOCTLs for DEVICE file descriptors --------------- */
 149
 150 /**
 151  * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7,
 152  *                                              struct vfio_device_info)
 153  *
 154  * Retrieve information about the device.  Fills in provided
 155  * struct vfio_device_info.  Caller sets argsz.
 156  * Return: 0 on success, -errno on failure.
 157  */
 158 struct vfio_device_info {
 159         __u32   argsz;
 160         __u32   flags;
 161 #define VFIO_DEVICE_FLAGS_RESET (1 << 0)        /* Device supports reset */
 162 #define VFIO_DEVICE_FLAGS_PCI   (1 << 1)        /* vfio-pci device */
 163 #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2)     /* vfio-platform device */
 164 #define VFIO_DEVICE_FLAGS_AMBA  (1 << 3)        /* vfio-amba device */
 165         __u32   num_regions;    /* Max region index + 1 */
 166         __u32   num_irqs;       /* Max IRQ index + 1 */
 167 };
 168 #define VFIO_DEVICE_GET_INFO            _IO(VFIO_TYPE, VFIO_BASE + 7)
 169
 170 /**
 171  * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
 172  *                                     struct vfio_region_info)
 173  *
 174  * Retrieve information about a device region.  Caller provides
 175  * struct vfio_region_info with index value set.  Caller sets argsz.
 176  * Implementation of region mapping is bus driver specific.  This is
 177  * intended to describe MMIO, I/O port, as well as bus specific
 178  * regions (ex. PCI config space).  Zero sized regions may be used
 179  * to describe unimplemented regions (ex. unimplemented PCI BARs).
 180  * Return: 0 on success, -errno on failure.
 181  */
 182 struct vfio_region_info {
 183         __u32   argsz;
 184         __u32   flags;
 185 #define VFIO_REGION_INFO_FLAG_READ      (1 << 0) /* Region supports read */
 186 #define VFIO_REGION_INFO_FLAG_WRITE     (1 << 1) /* Region supports write */
 187 #define VFIO_REGION_INFO_FLAG_MMAP      (1 << 2) /* Region supports mmap */
 188         __u32   index;          /* Region index */
 189         __u32   resv;           /* Reserved for alignment */
 190         __u64   size;           /* Region size (bytes) */
 191         __u64   offset;         /* Region offset from start of device fd */
 192 };
 193 #define VFIO_DEVICE_GET_REGION_INFO     _IO(VFIO_TYPE, VFIO_BASE + 8)
 194
 195 /**
 196  * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
 197  *                                  struct vfio_irq_info)
 198  *
 199  * Retrieve information about a device IRQ.  Caller provides
 200  * struct vfio_irq_info with index value set.  Caller sets argsz.
 201  * Implementation of IRQ mapping is bus driver specific.  Indexes
 202  * using multiple IRQs are primarily intended to support MSI-like
 203  * interrupt blocks.  Zero count irq blocks may be used to describe
 204  * unimplemented interrupt types.
 205  *
 206  * The EVENTFD flag indicates the interrupt index supports eventfd based
 207  * signaling.
 208  *
 209  * The MASKABLE flags indicates the index supports MASK and UNMASK
 210  * actions described below.
 211  *
 212  * AUTOMASKED indicates that after signaling, the interrupt line is
 213  * automatically masked by VFIO and the user needs to unmask the line
 214  * to receive new interrupts.  This is primarily intended to distinguish
 215  * level triggered interrupts.
 216  *
 217  * The NORESIZE flag indicates that the interrupt lines within the index
 218  * are setup as a set and new subindexes cannot be enabled without first
 219  * disabling the entire index.  This is used for interrupts like PCI MSI
 220  * and MSI-X where the driver may only use a subset of the available
 221  * indexes, but VFIO needs to enable a specific number of vectors
 222  * upfront.  In the case of MSI-X, where the user can enable MSI-X and
 223  * then add and unmask vectors, it's up to userspace to make the decision
 224  * whether to allocate the maximum supported number of vectors or tear
 225  * down setup and incrementally increase the vectors as each is enabled.
 226  */
 227 struct vfio_irq_info {
 228         __u32   argsz;
 229         __u32   flags;
 230 #define VFIO_IRQ_INFO_EVENTFD           (1 << 0)
 231 #define VFIO_IRQ_INFO_MASKABLE          (1 << 1)
 232 #define VFIO_IRQ_INFO_AUTOMASKED        (1 << 2)
 233 #define VFIO_IRQ_INFO_NORESIZE          (1 << 3)
 234         __u32   index;          /* IRQ index */
 235         __u32   count;          /* Number of IRQs within this index */
 236 };
 237 #define VFIO_DEVICE_GET_IRQ_INFO        _IO(VFIO_TYPE, VFIO_BASE + 9)
 238
 239 /**
 240  * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set)
 241  *
 242  * Set signaling, masking, and unmasking of interrupts.  Caller provides
 243  * struct vfio_irq_set with all fields set.  'start' and 'count' indicate
 244  * the range of subindexes being specified.
 245  *
 246  * The DATA flags specify the type of data provided.  If DATA_NONE, the
 247  * operation performs the specified action immediately on the specified
 248  * interrupt(s).  For example, to unmask AUTOMASKED interrupt [0,0]:
 249  * flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1.
 250  *
 251  * DATA_BOOL allows sparse support for the same on arrays of interrupts.
 252  * For example, to mask interrupts [0,1] and [0,3] (but not [0,2]):
 253  * flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3,
 254  * data = {1,0,1}
 255  *
 256  * DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd.
 257  * A value of -1 can be used to either de-assign interrupts if already
 258  * assigned or skip un-assigned interrupts.  For example, to set an eventfd
 259  * to be trigger for interrupts [0,0] and [0,2]:
 260  * flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3,
 261  * data = {fd1, -1, fd2}
 262  * If index [0,1] is previously set, two count = 1 ioctls calls would be
 263  * required to set [0,0] and [0,2] without changing [0,1].
 264  *
 265  * Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used
 266  * with ACTION_TRIGGER to perform kernel level interrupt loopback testing
 267  * from userspace (ie. simulate hardware triggering).
 268  *
 269  * Setting of an event triggering mechanism to userspace for ACTION_TRIGGER
 270  * enables the interrupt index for the device.  Individual subindex interrupts
 271  * can be disabled using the -1 value for DATA_EVENTFD or the index can be
 272  * disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0.
 273  *
 274  * Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while
 275  * ACTION_TRIGGER specifies kernel->user signaling.
 276  */
 277 struct vfio_irq_set {
 278         __u32   argsz;
 279         __u32   flags;
 280 #define VFIO_IRQ_SET_DATA_NONE          (1 << 0) /* Data not present */
 281 #define VFIO_IRQ_SET_DATA_BOOL          (1 << 1) /* Data is bool (u8) */
 282 #define VFIO_IRQ_SET_DATA_EVENTFD       (1 << 2) /* Data is eventfd (s32) */
 283 #define VFIO_IRQ_SET_ACTION_MASK        (1 << 3) /* Mask interrupt */
 284 #define VFIO_IRQ_SET_ACTION_UNMASK      (1 << 4) /* Unmask interrupt */
 285 #define VFIO_IRQ_SET_ACTION_TRIGGER     (1 << 5) /* Trigger interrupt */
 286         __u32   index;
 287         __u32   start;
 288         __u32   count;
 289         __u8    data[];
 290 };
 291 #define VFIO_DEVICE_SET_IRQS            _IO(VFIO_TYPE, VFIO_BASE + 10)
 292
 293 #define VFIO_IRQ_SET_DATA_TYPE_MASK     (VFIO_IRQ_SET_DATA_NONE | \
 294                                          VFIO_IRQ_SET_DATA_BOOL | \
 295                                          VFIO_IRQ_SET_DATA_EVENTFD)
 296 #define VFIO_IRQ_SET_ACTION_TYPE_MASK   (VFIO_IRQ_SET_ACTION_MASK | \
 297                                          VFIO_IRQ_SET_ACTION_UNMASK | \
 298                                          VFIO_IRQ_SET_ACTION_TRIGGER)
 299 /**
 300  * VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11)
 301  *
 302  * Reset a device.
 303  */
 304 #define VFIO_DEVICE_RESET               _IO(VFIO_TYPE, VFIO_BASE + 11)
 305
 306 /*
 307  * The VFIO-PCI bus driver makes use of the following fixed region and
 308  * IRQ index mapping.  Unimplemented regions return a size of zero.
 309  * Unimplemented IRQ types return a count of zero.
 310  */
 311
 312 enum {
 313         VFIO_PCI_BAR0_REGION_INDEX,
 314         VFIO_PCI_BAR1_REGION_INDEX,
 315         VFIO_PCI_BAR2_REGION_INDEX,
 316         VFIO_PCI_BAR3_REGION_INDEX,
 317         VFIO_PCI_BAR4_REGION_INDEX,
 318         VFIO_PCI_BAR5_REGION_INDEX,
 319         VFIO_PCI_ROM_REGION_INDEX,
 320         VFIO_PCI_CONFIG_REGION_INDEX,
 321         /*
 322          * Expose VGA regions defined for PCI base class 03, subclass 00.
 323          * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df
 324          * as well as the MMIO range 0xa0000 to 0xbffff.  Each implemented
 325          * range is found at it's identity mapped offset from the region
 326          * offset, for example 0x3b0 is region_info.offset + 0x3b0.  Areas
 327          * between described ranges are unimplemented.
 328          */
 329         VFIO_PCI_VGA_REGION_INDEX,
 330         VFIO_PCI_NUM_REGIONS
 331 };
 332
 333 enum {
 334         VFIO_PCI_INTX_IRQ_INDEX,
 335         VFIO_PCI_MSI_IRQ_INDEX,
 336         VFIO_PCI_MSIX_IRQ_INDEX,
 337         VFIO_PCI_ERR_IRQ_INDEX,
 338         VFIO_PCI_REQ_IRQ_INDEX,
 339         VFIO_PCI_NUM_IRQS
 340 };
 341
 342 /**
 343  * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12,
 344  *                                            struct vfio_pci_hot_reset_info)
 345  *
 346  * Return: 0 on success, -errno on failure:
 347  *      -enospc = insufficient buffer, -enodev = unsupported for device.
 348  */
 349 struct vfio_pci_dependent_device {
 350         __u32   group_id;
 351         __u16   segment;
 352         __u8    bus;
 353         __u8    devfn; /* Use PCI_SLOT/PCI_FUNC */
 354 };
 355
 356 struct vfio_pci_hot_reset_info {
 357         __u32   argsz;
 358         __u32   flags;
 359         __u32   count;
 360         struct vfio_pci_dependent_device        devices[];
 361 };
 362
 363 #define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO      _IO(VFIO_TYPE, VFIO_BASE + 12)
 364
 365 /**
 366  * VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13,
 367  *                                  struct vfio_pci_hot_reset)
 368  *
 369  * Return: 0 on success, -errno on failure.
 370  */
 371 struct vfio_pci_hot_reset {
 372         __u32   argsz;
 373         __u32   flags;
 374         __u32   count;
 375         __s32   group_fds[];
 376 };
 377
 378 #define VFIO_DEVICE_PCI_HOT_RESET       _IO(VFIO_TYPE, VFIO_BASE + 13)
 379
 380 /* -------- API for Type1 VFIO IOMMU -------- */
 381
 382 /**
 383  * VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info)
 384  *
 385  * Retrieve information about the IOMMU object. Fills in provided
 386  * struct vfio_iommu_info. Caller sets argsz.
 387  *
 388  * XXX Should we do these by CHECK_EXTENSION too?
 389  */
 390 struct vfio_iommu_type1_info {
 391         __u32   argsz;
 392         __u32   flags;
 393 #define VFIO_IOMMU_INFO_PGSIZES (1 << 0)        /* supported page sizes info */
 394         __u64   iova_pgsizes;           /* Bitmap of supported page sizes */
 395 };
 396
 397 #define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
 398
 399 /**
 400  * VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map)
 401  *
 402  * Map process virtual addresses to IO virtual addresses using the
 403  * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required.
 404  */
 405 struct vfio_iommu_type1_dma_map {
 406         __u32   argsz;
 407         __u32   flags;
 408 #define VFIO_DMA_MAP_FLAG_READ (1 << 0)         /* readable from device */
 409 #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1)        /* writable from device */
 410         __u64   vaddr;                          /* Process virtual address */
 411         __u64   iova;                           /* IO virtual address */
 412         __u64   size;                           /* Size of mapping (bytes) */
 413 };
 414
 415 #define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13)
 416
 417 /**
 418  * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14,
 419  *                                                      struct vfio_dma_unmap)
 420  *
 421  * Unmap IO virtual addresses using the provided struct vfio_dma_unmap.
 422  * Caller sets argsz.  The actual unmapped size is returned in the size
 423  * field.  No guarantee is made to the user that arbitrary unmaps of iova
 424  * or size different from those used in the original mapping call will
 425  * succeed.
 426  */
 427 struct vfio_iommu_type1_dma_unmap {
 428         __u32   argsz;
 429         __u32   flags;
 430         __u64   iova;                           /* IO virtual address */
 431         __u64   size;                           /* Size of mapping (bytes) */
 432 };
 433
 434 #define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14)
 435
 436 /*
 437  * IOCTLs to enable/disable IOMMU container usage.
 438  * No parameters are supported.
 439  */
 440 #define VFIO_IOMMU_ENABLE       _IO(VFIO_TYPE, VFIO_BASE + 15)
 441 #define VFIO_IOMMU_DISABLE      _IO(VFIO_TYPE, VFIO_BASE + 16)
 442
 443 /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
 444
 445 /*
 446  * The SPAPR TCE info struct provides the information about the PCI bus
 447  * address ranges available for DMA, these values are programmed into
 448  * the hardware so the guest has to know that information.
 449  *
 450  * The DMA 32 bit window start is an absolute PCI bus address.
 451  * The IOVA address passed via map/unmap ioctls are absolute PCI bus
 452  * addresses too so the window works as a filter rather than an offset
 453  * for IOVA addresses.
 454  *
 455  * A flag will need to be added if other page sizes are supported,
 456  * so as defined here, it is always 4k.
 457  */
 458 struct vfio_iommu_spapr_tce_info {
 459         __u32 argsz;
 460         __u32 flags;                    /* reserved for future use */
 461         __u32 dma32_window_start;       /* 32 bit window start (bytes) */
 462         __u32 dma32_window_size;        /* 32 bit window size (bytes) */
 463 };
 464
 465 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO   _IO(VFIO_TYPE, VFIO_BASE + 12)
 466
 467 /*
 468  * EEH PE operation struct provides ways to:
 469  * - enable/disable EEH functionality;
 470  * - unfreeze IO/DMA for frozen PE;
 471  * - read PE state;
 472  * - reset PE;
 473  * - configure PE.
 474  */
 475 struct vfio_eeh_pe_op {
 476         __u32 argsz;
 477         __u32 flags;
 478         __u32 op;
 479 };
 480
 481 #define VFIO_EEH_PE_DISABLE             0       /* Disable EEH functionality */
 482 #define VFIO_EEH_PE_ENABLE              1       /* Enable EEH functionality  */
 483 #define VFIO_EEH_PE_UNFREEZE_IO         2       /* Enable IO for frozen PE   */
 484 #define VFIO_EEH_PE_UNFREEZE_DMA        3       /* Enable DMA for frozen PE  */
 485 #define VFIO_EEH_PE_GET_STATE           4       /* PE state retrieval        */
 486 #define  VFIO_EEH_PE_STATE_NORMAL       0       /* PE in functional state    */
 487 #define  VFIO_EEH_PE_STATE_RESET        1       /* PE reset in progress      */
 488 #define  VFIO_EEH_PE_STATE_STOPPED      2       /* Stopped DMA and IO        */
 489 #define  VFIO_EEH_PE_STATE_STOPPED_DMA  4       /* Stopped DMA only          */
 490 #define  VFIO_EEH_PE_STATE_UNAVAIL      5       /* State unavailable         */
 491 #define VFIO_EEH_PE_RESET_DEACTIVATE    5       /* Deassert PE reset         */
 492 #define VFIO_EEH_PE_RESET_HOT           6       /* Assert hot reset          */
 493 #define VFIO_EEH_PE_RESET_FUNDAMENTAL   7       /* Assert fundamental reset  */
 494 #define VFIO_EEH_PE_CONFIGURE           8       /* PE configuration          */
 495
 496 #define VFIO_EEH_PE_OP                  _IO(VFIO_TYPE, VFIO_BASE + 21)
 497
 498 /* ***************************************************************** */
 499
 500 #endif /* VFIO_H */