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 #define VFIO_SPAPR_TCE_v2_IOMMU         7
  40
  41 /*
  42  * The No-IOMMU IOMMU offers no translation or isolation for devices and
  43  * supports no ioctls outside of VFIO_CHECK_EXTENSION.  Use of VFIO's No-IOMMU
  44  * code will taint the host kernel and should be used with extreme caution.
  45  */
  46 #define VFIO_NOIOMMU_IOMMU              8
  47
  48 /*
  49  * The IOCTL interface is designed for extensibility by embedding the
  50  * structure length (argsz) and flags into structures passed between
  51  * kernel and userspace.  We therefore use the _IO() macro for these
  52  * defines to avoid implicitly embedding a size into the ioctl request.
  53  * As structure fields are added, argsz will increase to match and flag
  54  * bits will be defined to indicate additional fields with valid data.
  55  * It's *always* the caller's responsibility to indicate the size of
  56  * the structure passed by setting argsz appropriately.
  57  */
  58
  59 #define VFIO_TYPE       (';')
  60 #define VFIO_BASE       100
  61
  62 /*
  63  * For extension of INFO ioctls, VFIO makes use of a capability chain
  64  * designed after PCI/e capabilities.  A flag bit indicates whether
  65  * this capability chain is supported and a field defined in the fixed
  66  * structure defines the offset of the first capability in the chain.
  67  * This field is only valid when the corresponding bit in the flags
  68  * bitmap is set.  This offset field is relative to the start of the
  69  * INFO buffer, as is the next field within each capability header.
  70  * The id within the header is a shared address space per INFO ioctl,
  71  * while the version field is specific to the capability id.  The
  72  * contents following the header are specific to the capability id.
  73  */
  74 struct vfio_info_cap_header {
  75         __u16   id;             /* Identifies capability */
  76         __u16   version;        /* Version specific to the capability ID */
  77         __u32   next;           /* Offset of next capability */
  78 };
  79
  80 /*
  81  * Callers of INFO ioctls passing insufficiently sized buffers will see
  82  * the capability chain flag bit set, a zero value for the first capability
  83  * offset (if available within the provided argsz), and argsz will be
  84  * updated to report the necessary buffer size.  For compatibility, the
  85  * INFO ioctl will not report error in this case, but the capability chain
  86  * will not be available.
  87  */
  88
  89 /* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */
  90
  91 /**
  92  * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0)
  93  *
  94  * Report the version of the VFIO API.  This allows us to bump the entire
  95  * API version should we later need to add or change features in incompatible
  96  * ways.
  97  * Return: VFIO_API_VERSION
  98  * Availability: Always
  99  */
 100 #define VFIO_GET_API_VERSION            _IO(VFIO_TYPE, VFIO_BASE + 0)
 101
 102 /**
 103  * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32)
 104  *
 105  * Check whether an extension is supported.
 106  * Return: 0 if not supported, 1 (or some other positive integer) if supported.
 107  * Availability: Always
 108  */
 109 #define VFIO_CHECK_EXTENSION            _IO(VFIO_TYPE, VFIO_BASE + 1)
 110
 111 /**
 112  * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32)
 113  *
 114  * Set the iommu to the given type.  The type must be supported by an
 115  * iommu driver as verified by calling CHECK_EXTENSION using the same
 116  * type.  A group must be set to this file descriptor before this
 117  * ioctl is available.  The IOMMU interfaces enabled by this call are
 118  * specific to the value set.
 119  * Return: 0 on success, -errno on failure
 120  * Availability: When VFIO group attached
 121  */
 122 #define VFIO_SET_IOMMU                  _IO(VFIO_TYPE, VFIO_BASE + 2)
 123
 124 /* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */
 125
 126 /**
 127  * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3,
 128  *                                              struct vfio_group_status)
 129  *
 130  * Retrieve information about the group.  Fills in provided
 131  * struct vfio_group_info.  Caller sets argsz.
 132  * Return: 0 on succes, -errno on failure.
 133  * Availability: Always
 134  */
 135 struct vfio_group_status {
 136         __u32   argsz;
 137         __u32   flags;
 138 #define VFIO_GROUP_FLAGS_VIABLE         (1 << 0)
 139 #define VFIO_GROUP_FLAGS_CONTAINER_SET  (1 << 1)
 140 };
 141 #define VFIO_GROUP_GET_STATUS           _IO(VFIO_TYPE, VFIO_BASE + 3)
 142
 143 /**
 144  * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)
 145  *
 146  * Set the container for the VFIO group to the open VFIO file
 147  * descriptor provided.  Groups may only belong to a single
 148  * container.  Containers may, at their discretion, support multiple
 149  * groups.  Only when a container is set are all of the interfaces
 150  * of the VFIO file descriptor and the VFIO group file descriptor
 151  * available to the user.
 152  * Return: 0 on success, -errno on failure.
 153  * Availability: Always
 154  */
 155 #define VFIO_GROUP_SET_CONTAINER        _IO(VFIO_TYPE, VFIO_BASE + 4)
 156
 157 /**
 158  * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5)
 159  *
 160  * Remove the group from the attached container.  This is the
 161  * opposite of the SET_CONTAINER call and returns the group to
 162  * an initial state.  All device file descriptors must be released
 163  * prior to calling this interface.  When removing the last group
 164  * from a container, the IOMMU will be disabled and all state lost,
 165  * effectively also returning the VFIO file descriptor to an initial
 166  * state.
 167  * Return: 0 on success, -errno on failure.
 168  * Availability: When attached to container
 169  */
 170 #define VFIO_GROUP_UNSET_CONTAINER      _IO(VFIO_TYPE, VFIO_BASE + 5)
 171
 172 /**
 173  * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char)
 174  *
 175  * Return a new file descriptor for the device object described by
 176  * the provided string.  The string should match a device listed in
 177  * the devices subdirectory of the IOMMU group sysfs entry.  The
 178  * group containing the device must already be added to this context.
 179  * Return: new file descriptor on success, -errno on failure.
 180  * Availability: When attached to container
 181  */
 182 #define VFIO_GROUP_GET_DEVICE_FD        _IO(VFIO_TYPE, VFIO_BASE + 6)
 183
 184 /* --------------- IOCTLs for DEVICE file descriptors --------------- */
 185
 186 /**
 187  * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7,
 188  *                                              struct vfio_device_info)
 189  *
 190  * Retrieve information about the device.  Fills in provided
 191  * struct vfio_device_info.  Caller sets argsz.
 192  * Return: 0 on success, -errno on failure.
 193  */
 194 struct vfio_device_info {
 195         __u32   argsz;
 196         __u32   flags;
 197 #define VFIO_DEVICE_FLAGS_RESET (1 << 0)        /* Device supports reset */
 198 #define VFIO_DEVICE_FLAGS_PCI   (1 << 1)        /* vfio-pci device */
 199 #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2)     /* vfio-platform device */
 200 #define VFIO_DEVICE_FLAGS_AMBA  (1 << 3)        /* vfio-amba device */
 201         __u32   num_regions;    /* Max region index + 1 */
 202         __u32   num_irqs;       /* Max IRQ index + 1 */
 203 };
 204 #define VFIO_DEVICE_GET_INFO            _IO(VFIO_TYPE, VFIO_BASE + 7)
 205
 206 /**
 207  * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
 208  *                                     struct vfio_region_info)
 209  *
 210  * Retrieve information about a device region.  Caller provides
 211  * struct vfio_region_info with index value set.  Caller sets argsz.
 212  * Implementation of region mapping is bus driver specific.  This is
 213  * intended to describe MMIO, I/O port, as well as bus specific
 214  * regions (ex. PCI config space).  Zero sized regions may be used
 215  * to describe unimplemented regions (ex. unimplemented PCI BARs).
 216  * Return: 0 on success, -errno on failure.
 217  */
 218 struct vfio_region_info {
 219         __u32   argsz;
 220         __u32   flags;
 221 #define VFIO_REGION_INFO_FLAG_READ      (1 << 0) /* Region supports read */
 222 #define VFIO_REGION_INFO_FLAG_WRITE     (1 << 1) /* Region supports write */
 223 #define VFIO_REGION_INFO_FLAG_MMAP      (1 << 2) /* Region supports mmap */
 224 #define VFIO_REGION_INFO_FLAG_CAPS      (1 << 3) /* Info supports caps */
 225         __u32   index;          /* Region index */
 226         __u32   cap_offset;     /* Offset within info struct of first cap */
 227         __u64   size;           /* Region size (bytes) */
 228         __u64   offset;         /* Region offset from start of device fd */
 229 };
 230 #define VFIO_DEVICE_GET_REGION_INFO     _IO(VFIO_TYPE, VFIO_BASE + 8)
 231
 232 /*
 233  * The sparse mmap capability allows finer granularity of specifying areas
 234  * within a region with mmap support.  When specified, the user should only
 235  * mmap the offset ranges specified by the areas array.  mmaps outside of the
 236  * areas specified may fail (such as the range covering a PCI MSI-X table) or
 237  * may result in improper device behavior.
 238  *
 239  * The structures below define version 1 of this capability.
 240  */
 241 #define VFIO_REGION_INFO_CAP_SPARSE_MMAP        1
 242
 243 struct vfio_region_sparse_mmap_area {
 244         __u64   offset; /* Offset of mmap'able area within region */
 245         __u64   size;   /* Size of mmap'able area */
 246 };
 247
 248 struct vfio_region_info_cap_sparse_mmap {
 249         struct vfio_info_cap_header header;
 250         __u32   nr_areas;
 251         __u32   reserved;
 252         struct vfio_region_sparse_mmap_area areas[];
 253 };
 254
 255 /*
 256  * The device specific type capability allows regions unique to a specific
 257  * device or class of devices to be exposed.  This helps solve the problem for
 258  * vfio bus drivers of defining which region indexes correspond to which region
 259  * on the device, without needing to resort to static indexes, as done by
 260  * vfio-pci.  For instance, if we were to go back in time, we might remove
 261  * VFIO_PCI_VGA_REGION_INDEX and let vfio-pci simply define that all indexes
 262  * greater than or equal to VFIO_PCI_NUM_REGIONS are device specific and we'd
 263  * make a "VGA" device specific type to describe the VGA access space.  This
 264  * means that non-VGA devices wouldn't need to waste this index, and thus the
 265  * address space associated with it due to implementation of device file
 266  * descriptor offsets in vfio-pci.
 267  *
 268  * The current implementation is now part of the user ABI, so we can't use this
 269  * for VGA, but there are other upcoming use cases, such as opregions for Intel
 270  * IGD devices and framebuffers for vGPU devices.  We missed VGA, but we'll
 271  * use this for future additions.
 272  *
 273  * The structure below defines version 1 of this capability.
 274  */
 275 #define VFIO_REGION_INFO_CAP_TYPE       2
 276
 277 struct vfio_region_info_cap_type {
 278         struct vfio_info_cap_header header;
 279         __u32 type;     /* global per bus driver */
 280         __u32 subtype;  /* type specific */
 281 };
 282
 283 #define VFIO_REGION_TYPE_PCI_VENDOR_TYPE        (1 << 31)
 284 #define VFIO_REGION_TYPE_PCI_VENDOR_MASK        (0xffff)
 285
 286 /* 8086 Vendor sub-types */
 287 #define VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION  (1)
 288 #define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG  (2)
 289 #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG   (3)
 290
 291 /**
 292  * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
 293  *                                  struct vfio_irq_info)
 294  *
 295  * Retrieve information about a device IRQ.  Caller provides
 296  * struct vfio_irq_info with index value set.  Caller sets argsz.
 297  * Implementation of IRQ mapping is bus driver specific.  Indexes
 298  * using multiple IRQs are primarily intended to support MSI-like
 299  * interrupt blocks.  Zero count irq blocks may be used to describe
 300  * unimplemented interrupt types.
 301  *
 302  * The EVENTFD flag indicates the interrupt index supports eventfd based
 303  * signaling.
 304  *
 305  * The MASKABLE flags indicates the index supports MASK and UNMASK
 306  * actions described below.
 307  *
 308  * AUTOMASKED indicates that after signaling, the interrupt line is
 309  * automatically masked by VFIO and the user needs to unmask the line
 310  * to receive new interrupts.  This is primarily intended to distinguish
 311  * level triggered interrupts.
 312  *
 313  * The NORESIZE flag indicates that the interrupt lines within the index
 314  * are setup as a set and new subindexes cannot be enabled without first
 315  * disabling the entire index.  This is used for interrupts like PCI MSI
 316  * and MSI-X where the driver may only use a subset of the available
 317  * indexes, but VFIO needs to enable a specific number of vectors
 318  * upfront.  In the case of MSI-X, where the user can enable MSI-X and
 319  * then add and unmask vectors, it's up to userspace to make the decision
 320  * whether to allocate the maximum supported number of vectors or tear
 321  * down setup and incrementally increase the vectors as each is enabled.
 322  */
 323 struct vfio_irq_info {
 324         __u32   argsz;
 325         __u32   flags;
 326 #define VFIO_IRQ_INFO_EVENTFD           (1 << 0)
 327 #define VFIO_IRQ_INFO_MASKABLE          (1 << 1)
 328 #define VFIO_IRQ_INFO_AUTOMASKED        (1 << 2)
 329 #define VFIO_IRQ_INFO_NORESIZE          (1 << 3)
 330         __u32   index;          /* IRQ index */
 331         __u32   count;          /* Number of IRQs within this index */
 332 };
 333 #define VFIO_DEVICE_GET_IRQ_INFO        _IO(VFIO_TYPE, VFIO_BASE + 9)
 334
 335 /**
 336  * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set)
 337  *
 338  * Set signaling, masking, and unmasking of interrupts.  Caller provides
 339  * struct vfio_irq_set with all fields set.  'start' and 'count' indicate
 340  * the range of subindexes being specified.
 341  *
 342  * The DATA flags specify the type of data provided.  If DATA_NONE, the
 343  * operation performs the specified action immediately on the specified
 344  * interrupt(s).  For example, to unmask AUTOMASKED interrupt [0,0]:
 345  * flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1.
 346  *
 347  * DATA_BOOL allows sparse support for the same on arrays of interrupts.
 348  * For example, to mask interrupts [0,1] and [0,3] (but not [0,2]):
 349  * flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3,
 350  * data = {1,0,1}
 351  *
 352  * DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd.
 353  * A value of -1 can be used to either de-assign interrupts if already
 354  * assigned or skip un-assigned interrupts.  For example, to set an eventfd
 355  * to be trigger for interrupts [0,0] and [0,2]:
 356  * flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3,
 357  * data = {fd1, -1, fd2}
 358  * If index [0,1] is previously set, two count = 1 ioctls calls would be
 359  * required to set [0,0] and [0,2] without changing [0,1].
 360  *
 361  * Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used
 362  * with ACTION_TRIGGER to perform kernel level interrupt loopback testing
 363  * from userspace (ie. simulate hardware triggering).
 364  *
 365  * Setting of an event triggering mechanism to userspace for ACTION_TRIGGER
 366  * enables the interrupt index for the device.  Individual subindex interrupts
 367  * can be disabled using the -1 value for DATA_EVENTFD or the index can be
 368  * disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0.
 369  *
 370  * Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while
 371  * ACTION_TRIGGER specifies kernel->user signaling.
 372  */
 373 struct vfio_irq_set {
 374         __u32   argsz;
 375         __u32   flags;
 376 #define VFIO_IRQ_SET_DATA_NONE          (1 << 0) /* Data not present */
 377 #define VFIO_IRQ_SET_DATA_BOOL          (1 << 1) /* Data is bool (u8) */
 378 #define VFIO_IRQ_SET_DATA_EVENTFD       (1 << 2) /* Data is eventfd (s32) */
 379 #define VFIO_IRQ_SET_ACTION_MASK        (1 << 3) /* Mask interrupt */
 380 #define VFIO_IRQ_SET_ACTION_UNMASK      (1 << 4) /* Unmask interrupt */
 381 #define VFIO_IRQ_SET_ACTION_TRIGGER     (1 << 5) /* Trigger interrupt */
 382         __u32   index;
 383         __u32   start;
 384         __u32   count;
 385         __u8    data[];
 386 };
 387 #define VFIO_DEVICE_SET_IRQS            _IO(VFIO_TYPE, VFIO_BASE + 10)
 388
 389 #define VFIO_IRQ_SET_DATA_TYPE_MASK     (VFIO_IRQ_SET_DATA_NONE | \
 390                                          VFIO_IRQ_SET_DATA_BOOL | \
 391                                          VFIO_IRQ_SET_DATA_EVENTFD)
 392 #define VFIO_IRQ_SET_ACTION_TYPE_MASK   (VFIO_IRQ_SET_ACTION_MASK | \
 393                                          VFIO_IRQ_SET_ACTION_UNMASK | \
 394                                          VFIO_IRQ_SET_ACTION_TRIGGER)
 395 /**
 396  * VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11)
 397  *
 398  * Reset a device.
 399  */
 400 #define VFIO_DEVICE_RESET               _IO(VFIO_TYPE, VFIO_BASE + 11)
 401
 402 /*
 403  * The VFIO-PCI bus driver makes use of the following fixed region and
 404  * IRQ index mapping.  Unimplemented regions return a size of zero.
 405  * Unimplemented IRQ types return a count of zero.
 406  */
 407
 408 enum {
 409         VFIO_PCI_BAR0_REGION_INDEX,
 410         VFIO_PCI_BAR1_REGION_INDEX,
 411         VFIO_PCI_BAR2_REGION_INDEX,
 412         VFIO_PCI_BAR3_REGION_INDEX,
 413         VFIO_PCI_BAR4_REGION_INDEX,
 414         VFIO_PCI_BAR5_REGION_INDEX,
 415         VFIO_PCI_ROM_REGION_INDEX,
 416         VFIO_PCI_CONFIG_REGION_INDEX,
 417         /*
 418          * Expose VGA regions defined for PCI base class 03, subclass 00.
 419          * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df
 420          * as well as the MMIO range 0xa0000 to 0xbffff.  Each implemented
 421          * range is found at it's identity mapped offset from the region
 422          * offset, for example 0x3b0 is region_info.offset + 0x3b0.  Areas
 423          * between described ranges are unimplemented.
 424          */
 425         VFIO_PCI_VGA_REGION_INDEX,
 426         VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */
 427                                  /* device specific cap to define content. */
 428 };
 429
 430 enum {
 431         VFIO_PCI_INTX_IRQ_INDEX,
 432         VFIO_PCI_MSI_IRQ_INDEX,
 433         VFIO_PCI_MSIX_IRQ_INDEX,
 434         VFIO_PCI_ERR_IRQ_INDEX,
 435         VFIO_PCI_REQ_IRQ_INDEX,
 436         VFIO_PCI_NUM_IRQS
 437 };
 438
 439 /**
 440  * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12,
 441  *                                            struct vfio_pci_hot_reset_info)
 442  *
 443  * Return: 0 on success, -errno on failure:
 444  *      -enospc = insufficient buffer, -enodev = unsupported for device.
 445  */
 446 struct vfio_pci_dependent_device {
 447         __u32   group_id;
 448         __u16   segment;
 449         __u8    bus;
 450         __u8    devfn; /* Use PCI_SLOT/PCI_FUNC */
 451 };
 452
 453 struct vfio_pci_hot_reset_info {
 454         __u32   argsz;
 455         __u32   flags;
 456         __u32   count;
 457         struct vfio_pci_dependent_device        devices[];
 458 };
 459
 460 #define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO      _IO(VFIO_TYPE, VFIO_BASE + 12)
 461
 462 /**
 463  * VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13,
 464  *                                  struct vfio_pci_hot_reset)
 465  *
 466  * Return: 0 on success, -errno on failure.
 467  */
 468 struct vfio_pci_hot_reset {
 469         __u32   argsz;
 470         __u32   flags;
 471         __u32   count;
 472         __s32   group_fds[];
 473 };
 474
 475 #define VFIO_DEVICE_PCI_HOT_RESET       _IO(VFIO_TYPE, VFIO_BASE + 13)
 476
 477 /* -------- API for Type1 VFIO IOMMU -------- */
 478
 479 /**
 480  * VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info)
 481  *
 482  * Retrieve information about the IOMMU object. Fills in provided
 483  * struct vfio_iommu_info. Caller sets argsz.
 484  *
 485  * XXX Should we do these by CHECK_EXTENSION too?
 486  */
 487 struct vfio_iommu_type1_info {
 488         __u32   argsz;
 489         __u32   flags;
 490 #define VFIO_IOMMU_INFO_PGSIZES (1 << 0)        /* supported page sizes info */
 491         __u64   iova_pgsizes;           /* Bitmap of supported page sizes */
 492 };
 493
 494 #define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
 495
 496 /**
 497  * VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map)
 498  *
 499  * Map process virtual addresses to IO virtual addresses using the
 500  * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required.
 501  */
 502 struct vfio_iommu_type1_dma_map {
 503         __u32   argsz;
 504         __u32   flags;
 505 #define VFIO_DMA_MAP_FLAG_READ (1 << 0)         /* readable from device */
 506 #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1)        /* writable from device */
 507         __u64   vaddr;                          /* Process virtual address */
 508         __u64   iova;                           /* IO virtual address */
 509         __u64   size;                           /* Size of mapping (bytes) */
 510 };
 511
 512 #define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13)
 513
 514 /**
 515  * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14,
 516  *                                                      struct vfio_dma_unmap)
 517  *
 518  * Unmap IO virtual addresses using the provided struct vfio_dma_unmap.
 519  * Caller sets argsz.  The actual unmapped size is returned in the size
 520  * field.  No guarantee is made to the user that arbitrary unmaps of iova
 521  * or size different from those used in the original mapping call will
 522  * succeed.
 523  */
 524 struct vfio_iommu_type1_dma_unmap {
 525         __u32   argsz;
 526         __u32   flags;
 527         __u64   iova;                           /* IO virtual address */
 528         __u64   size;                           /* Size of mapping (bytes) */
 529 };
 530
 531 #define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14)
 532
 533 /*
 534  * IOCTLs to enable/disable IOMMU container usage.
 535  * No parameters are supported.
 536  */
 537 #define VFIO_IOMMU_ENABLE       _IO(VFIO_TYPE, VFIO_BASE + 15)
 538 #define VFIO_IOMMU_DISABLE      _IO(VFIO_TYPE, VFIO_BASE + 16)
 539
 540 /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
 541
 542 /*
 543  * The SPAPR TCE DDW info struct provides the information about
 544  * the details of Dynamic DMA window capability.
 545  *
 546  * @pgsizes contains a page size bitmask, 4K/64K/16M are supported.
 547  * @max_dynamic_windows_supported tells the maximum number of windows
 548  * which the platform can create.
 549  * @levels tells the maximum number of levels in multi-level IOMMU tables;
 550  * this allows splitting a table into smaller chunks which reduces
 551  * the amount of physically contiguous memory required for the table.
 552  */
 553 struct vfio_iommu_spapr_tce_ddw_info {
 554         __u64 pgsizes;                  /* Bitmap of supported page sizes */
 555         __u32 max_dynamic_windows_supported;
 556         __u32 levels;
 557 };
 558
 559 /*
 560  * The SPAPR TCE info struct provides the information about the PCI bus
 561  * address ranges available for DMA, these values are programmed into
 562  * the hardware so the guest has to know that information.
 563  *
 564  * The DMA 32 bit window start is an absolute PCI bus address.
 565  * The IOVA address passed via map/unmap ioctls are absolute PCI bus
 566  * addresses too so the window works as a filter rather than an offset
 567  * for IOVA addresses.
 568  *
 569  * Flags supported:
 570  * - VFIO_IOMMU_SPAPR_INFO_DDW: informs the userspace that dynamic DMA windows
 571  *   (DDW) support is present. @ddw is only supported when DDW is present.
 572  */
 573 struct vfio_iommu_spapr_tce_info {
 574         __u32 argsz;
 575         __u32 flags;
 576 #define VFIO_IOMMU_SPAPR_INFO_DDW       (1 << 0)        /* DDW supported */
 577         __u32 dma32_window_start;       /* 32 bit window start (bytes) */
 578         __u32 dma32_window_size;        /* 32 bit window size (bytes) */
 579         struct vfio_iommu_spapr_tce_ddw_info ddw;
 580 };
 581
 582 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO   _IO(VFIO_TYPE, VFIO_BASE + 12)
 583
 584 /*
 585  * EEH PE operation struct provides ways to:
 586  * - enable/disable EEH functionality;
 587  * - unfreeze IO/DMA for frozen PE;
 588  * - read PE state;
 589  * - reset PE;
 590  * - configure PE;
 591  * - inject EEH error.
 592  */
 593 struct vfio_eeh_pe_err {
 594         __u32 type;
 595         __u32 func;
 596         __u64 addr;
 597         __u64 mask;
 598 };
 599
 600 struct vfio_eeh_pe_op {
 601         __u32 argsz;
 602         __u32 flags;
 603         __u32 op;
 604         union {
 605                 struct vfio_eeh_pe_err err;
 606         };
 607 };
 608
 609 #define VFIO_EEH_PE_DISABLE             0       /* Disable EEH functionality */
 610 #define VFIO_EEH_PE_ENABLE              1       /* Enable EEH functionality  */
 611 #define VFIO_EEH_PE_UNFREEZE_IO         2       /* Enable IO for frozen PE   */
 612 #define VFIO_EEH_PE_UNFREEZE_DMA        3       /* Enable DMA for frozen PE  */
 613 #define VFIO_EEH_PE_GET_STATE           4       /* PE state retrieval        */
 614 #define  VFIO_EEH_PE_STATE_NORMAL       0       /* PE in functional state    */
 615 #define  VFIO_EEH_PE_STATE_RESET        1       /* PE reset in progress      */
 616 #define  VFIO_EEH_PE_STATE_STOPPED      2       /* Stopped DMA and IO        */
 617 #define  VFIO_EEH_PE_STATE_STOPPED_DMA  4       /* Stopped DMA only          */
 618 #define  VFIO_EEH_PE_STATE_UNAVAIL      5       /* State unavailable         */
 619 #define VFIO_EEH_PE_RESET_DEACTIVATE    5       /* Deassert PE reset         */
 620 #define VFIO_EEH_PE_RESET_HOT           6       /* Assert hot reset          */
 621 #define VFIO_EEH_PE_RESET_FUNDAMENTAL   7       /* Assert fundamental reset  */
 622 #define VFIO_EEH_PE_CONFIGURE           8       /* PE configuration          */
 623 #define VFIO_EEH_PE_INJECT_ERR          9       /* Inject EEH error          */
 624
 625 #define VFIO_EEH_PE_OP                  _IO(VFIO_TYPE, VFIO_BASE + 21)
 626
 627 /**
 628  * VFIO_IOMMU_SPAPR_REGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 17, struct vfio_iommu_spapr_register_memory)
 629  *
 630  * Registers user space memory where DMA is allowed. It pins
 631  * user pages and does the locked memory accounting so
 632  * subsequent VFIO_IOMMU_MAP_DMA/VFIO_IOMMU_UNMAP_DMA calls
 633  * get faster.
 634  */
 635 struct vfio_iommu_spapr_register_memory {
 636         __u32   argsz;
 637         __u32   flags;
 638         __u64   vaddr;                          /* Process virtual address */
 639         __u64   size;                           /* Size of mapping (bytes) */
 640 };
 641 #define VFIO_IOMMU_SPAPR_REGISTER_MEMORY        _IO(VFIO_TYPE, VFIO_BASE + 17)
 642
 643 /**
 644  * VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 18, struct vfio_iommu_spapr_register_memory)
 645  *
 646  * Unregisters user space memory registered with
 647  * VFIO_IOMMU_SPAPR_REGISTER_MEMORY.
 648  * Uses vfio_iommu_spapr_register_memory for parameters.
 649  */
 650 #define VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY      _IO(VFIO_TYPE, VFIO_BASE + 18)
 651
 652 /**
 653  * VFIO_IOMMU_SPAPR_TCE_CREATE - _IOWR(VFIO_TYPE, VFIO_BASE + 19, struct vfio_iommu_spapr_tce_create)
 654  *
 655  * Creates an additional TCE table and programs it (sets a new DMA window)
 656  * to every IOMMU group in the container. It receives page shift, window
 657  * size and number of levels in the TCE table being created.
 658  *
 659  * It allocates and returns an offset on a PCI bus of the new DMA window.
 660  */
 661 struct vfio_iommu_spapr_tce_create {
 662         __u32 argsz;
 663         __u32 flags;
 664         /* in */
 665         __u32 page_shift;
 666         __u32 __resv1;
 667         __u64 window_size;
 668         __u32 levels;
 669         __u32 __resv2;
 670         /* out */
 671         __u64 start_addr;
 672 };
 673 #define VFIO_IOMMU_SPAPR_TCE_CREATE     _IO(VFIO_TYPE, VFIO_BASE + 19)
 674
 675 /**
 676  * VFIO_IOMMU_SPAPR_TCE_REMOVE - _IOW(VFIO_TYPE, VFIO_BASE + 20, struct vfio_iommu_spapr_tce_remove)
 677  *
 678  * Unprograms a TCE table from all groups in the container and destroys it.
 679  * It receives a PCI bus offset as a window id.
 680  */
 681 struct vfio_iommu_spapr_tce_remove {
 682         __u32 argsz;
 683         __u32 flags;
 684         /* in */
 685         __u64 start_addr;
 686 };
 687 #define VFIO_IOMMU_SPAPR_TCE_REMOVE     _IO(VFIO_TYPE, VFIO_BASE + 20)
 688
 689 /* ***************************************************************** */
 690
 691 #endif /* VFIO_H */