1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * VFIO API definition 4 * 5 * Copyright (C) 2012 Red Hat, Inc. All rights reserved. 6 * Author: Alex Williamson <alex.williamson@redhat.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #ifndef VFIO_H 13 #define VFIO_H 14 15 #include <linux/types.h> 16 #include <linux/ioctl.h> 17 18 #define VFIO_API_VERSION 0 19 20 21 /* Kernel & User level defines for VFIO IOCTLs. */ 22 23 /* Extensions */ 24 25 #define VFIO_TYPE1_IOMMU 1 26 #define VFIO_SPAPR_TCE_IOMMU 2 27 #define VFIO_TYPE1v2_IOMMU 3 28 /* 29 * IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping). This 30 * capability is subject to change as groups are added or removed. 31 */ 32 #define VFIO_DMA_CC_IOMMU 4 33 34 /* Check if EEH is supported */ 35 #define VFIO_EEH 5 36 37 /* Two-stage IOMMU */ 38 #define VFIO_TYPE1_NESTING_IOMMU 6 /* Implies v2 */ 39 40 #define VFIO_SPAPR_TCE_v2_IOMMU 7 41 42 /* 43 * The No-IOMMU IOMMU offers no translation or isolation for devices and 44 * supports no ioctls outside of VFIO_CHECK_EXTENSION. Use of VFIO's No-IOMMU 45 * code will taint the host kernel and should be used with extreme caution. 46 */ 47 #define VFIO_NOIOMMU_IOMMU 8 48 49 /* 50 * The IOCTL interface is designed for extensibility by embedding the 51 * structure length (argsz) and flags into structures passed between 52 * kernel and userspace. We therefore use the _IO() macro for these 53 * defines to avoid implicitly embedding a size into the ioctl request. 54 * As structure fields are added, argsz will increase to match and flag 55 * bits will be defined to indicate additional fields with valid data. 56 * It's *always* the caller's responsibility to indicate the size of 57 * the structure passed by setting argsz appropriately. 58 */ 59 60 #define VFIO_TYPE (';') 61 #define VFIO_BASE 100 62 63 /* 64 * For extension of INFO ioctls, VFIO makes use of a capability chain 65 * designed after PCI/e capabilities. A flag bit indicates whether 66 * this capability chain is supported and a field defined in the fixed 67 * structure defines the offset of the first capability in the chain. 68 * This field is only valid when the corresponding bit in the flags 69 * bitmap is set. This offset field is relative to the start of the 70 * INFO buffer, as is the next field within each capability header. 71 * The id within the header is a shared address space per INFO ioctl, 72 * while the version field is specific to the capability id. The 73 * contents following the header are specific to the capability id. 74 */ 75 struct vfio_info_cap_header { 76 __u16 id; /* Identifies capability */ 77 __u16 version; /* Version specific to the capability ID */ 78 __u32 next; /* Offset of next capability */ 79 }; 80 81 /* 82 * Callers of INFO ioctls passing insufficiently sized buffers will see 83 * the capability chain flag bit set, a zero value for the first capability 84 * offset (if available within the provided argsz), and argsz will be 85 * updated to report the necessary buffer size. For compatibility, the 86 * INFO ioctl will not report error in this case, but the capability chain 87 * will not be available. 88 */ 89 90 /* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */ 91 92 /** 93 * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0) 94 * 95 * Report the version of the VFIO API. This allows us to bump the entire 96 * API version should we later need to add or change features in incompatible 97 * ways. 98 * Return: VFIO_API_VERSION 99 * Availability: Always 100 */ 101 #define VFIO_GET_API_VERSION _IO(VFIO_TYPE, VFIO_BASE + 0) 102 103 /** 104 * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32) 105 * 106 * Check whether an extension is supported. 107 * Return: 0 if not supported, 1 (or some other positive integer) if supported. 108 * Availability: Always 109 */ 110 #define VFIO_CHECK_EXTENSION _IO(VFIO_TYPE, VFIO_BASE + 1) 111 112 /** 113 * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32) 114 * 115 * Set the iommu to the given type. The type must be supported by an 116 * iommu driver as verified by calling CHECK_EXTENSION using the same 117 * type. A group must be set to this file descriptor before this 118 * ioctl is available. The IOMMU interfaces enabled by this call are 119 * specific to the value set. 120 * Return: 0 on success, -errno on failure 121 * Availability: When VFIO group attached 122 */ 123 #define VFIO_SET_IOMMU _IO(VFIO_TYPE, VFIO_BASE + 2) 124 125 /* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */ 126 127 /** 128 * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3, 129 * struct vfio_group_status) 130 * 131 * Retrieve information about the group. Fills in provided 132 * struct vfio_group_info. Caller sets argsz. 133 * Return: 0 on succes, -errno on failure. 134 * Availability: Always 135 */ 136 struct vfio_group_status { 137 __u32 argsz; 138 __u32 flags; 139 #define VFIO_GROUP_FLAGS_VIABLE (1 << 0) 140 #define VFIO_GROUP_FLAGS_CONTAINER_SET (1 << 1) 141 }; 142 #define VFIO_GROUP_GET_STATUS _IO(VFIO_TYPE, VFIO_BASE + 3) 143 144 /** 145 * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32) 146 * 147 * Set the container for the VFIO group to the open VFIO file 148 * descriptor provided. Groups may only belong to a single 149 * container. Containers may, at their discretion, support multiple 150 * groups. Only when a container is set are all of the interfaces 151 * of the VFIO file descriptor and the VFIO group file descriptor 152 * available to the user. 153 * Return: 0 on success, -errno on failure. 154 * Availability: Always 155 */ 156 #define VFIO_GROUP_SET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 4) 157 158 /** 159 * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5) 160 * 161 * Remove the group from the attached container. This is the 162 * opposite of the SET_CONTAINER call and returns the group to 163 * an initial state. All device file descriptors must be released 164 * prior to calling this interface. When removing the last group 165 * from a container, the IOMMU will be disabled and all state lost, 166 * effectively also returning the VFIO file descriptor to an initial 167 * state. 168 * Return: 0 on success, -errno on failure. 169 * Availability: When attached to container 170 */ 171 #define VFIO_GROUP_UNSET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 5) 172 173 /** 174 * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char) 175 * 176 * Return a new file descriptor for the device object described by 177 * the provided string. The string should match a device listed in 178 * the devices subdirectory of the IOMMU group sysfs entry. The 179 * group containing the device must already be added to this context. 180 * Return: new file descriptor on success, -errno on failure. 181 * Availability: When attached to container 182 */ 183 #define VFIO_GROUP_GET_DEVICE_FD _IO(VFIO_TYPE, VFIO_BASE + 6) 184 185 /* --------------- IOCTLs for DEVICE file descriptors --------------- */ 186 187 /** 188 * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7, 189 * struct vfio_device_info) 190 * 191 * Retrieve information about the device. Fills in provided 192 * struct vfio_device_info. Caller sets argsz. 193 * Return: 0 on success, -errno on failure. 194 */ 195 struct vfio_device_info { 196 __u32 argsz; 197 __u32 flags; 198 #define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */ 199 #define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */ 200 #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */ 201 #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */ 202 #define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */ 203 __u32 num_regions; /* Max region index + 1 */ 204 __u32 num_irqs; /* Max IRQ index + 1 */ 205 }; 206 #define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7) 207 208 /* 209 * Vendor driver using Mediated device framework should provide device_api 210 * attribute in supported type attribute groups. Device API string should be one 211 * of the following corresponding to device flags in vfio_device_info structure. 212 */ 213 214 #define VFIO_DEVICE_API_PCI_STRING "vfio-pci" 215 #define VFIO_DEVICE_API_PLATFORM_STRING "vfio-platform" 216 #define VFIO_DEVICE_API_AMBA_STRING "vfio-amba" 217 #define VFIO_DEVICE_API_CCW_STRING "vfio-ccw" 218 219 /** 220 * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8, 221 * struct vfio_region_info) 222 * 223 * Retrieve information about a device region. Caller provides 224 * struct vfio_region_info with index value set. Caller sets argsz. 225 * Implementation of region mapping is bus driver specific. This is 226 * intended to describe MMIO, I/O port, as well as bus specific 227 * regions (ex. PCI config space). Zero sized regions may be used 228 * to describe unimplemented regions (ex. unimplemented PCI BARs). 229 * Return: 0 on success, -errno on failure. 230 */ 231 struct vfio_region_info { 232 __u32 argsz; 233 __u32 flags; 234 #define VFIO_REGION_INFO_FLAG_READ (1 << 0) /* Region supports read */ 235 #define VFIO_REGION_INFO_FLAG_WRITE (1 << 1) /* Region supports write */ 236 #define VFIO_REGION_INFO_FLAG_MMAP (1 << 2) /* Region supports mmap */ 237 #define VFIO_REGION_INFO_FLAG_CAPS (1 << 3) /* Info supports caps */ 238 __u32 index; /* Region index */ 239 __u32 cap_offset; /* Offset within info struct of first cap */ 240 __u64 size; /* Region size (bytes) */ 241 __u64 offset; /* Region offset from start of device fd */ 242 }; 243 #define VFIO_DEVICE_GET_REGION_INFO _IO(VFIO_TYPE, VFIO_BASE + 8) 244 245 /* 246 * The sparse mmap capability allows finer granularity of specifying areas 247 * within a region with mmap support. When specified, the user should only 248 * mmap the offset ranges specified by the areas array. mmaps outside of the 249 * areas specified may fail (such as the range covering a PCI MSI-X table) or 250 * may result in improper device behavior. 251 * 252 * The structures below define version 1 of this capability. 253 */ 254 #define VFIO_REGION_INFO_CAP_SPARSE_MMAP 1 255 256 struct vfio_region_sparse_mmap_area { 257 __u64 offset; /* Offset of mmap'able area within region */ 258 __u64 size; /* Size of mmap'able area */ 259 }; 260 261 struct vfio_region_info_cap_sparse_mmap { 262 struct vfio_info_cap_header header; 263 __u32 nr_areas; 264 __u32 reserved; 265 struct vfio_region_sparse_mmap_area areas[]; 266 }; 267 268 /* 269 * The device specific type capability allows regions unique to a specific 270 * device or class of devices to be exposed. This helps solve the problem for 271 * vfio bus drivers of defining which region indexes correspond to which region 272 * on the device, without needing to resort to static indexes, as done by 273 * vfio-pci. For instance, if we were to go back in time, we might remove 274 * VFIO_PCI_VGA_REGION_INDEX and let vfio-pci simply define that all indexes 275 * greater than or equal to VFIO_PCI_NUM_REGIONS are device specific and we'd 276 * make a "VGA" device specific type to describe the VGA access space. This 277 * means that non-VGA devices wouldn't need to waste this index, and thus the 278 * address space associated with it due to implementation of device file 279 * descriptor offsets in vfio-pci. 280 * 281 * The current implementation is now part of the user ABI, so we can't use this 282 * for VGA, but there are other upcoming use cases, such as opregions for Intel 283 * IGD devices and framebuffers for vGPU devices. We missed VGA, but we'll 284 * use this for future additions. 285 * 286 * The structure below defines version 1 of this capability. 287 */ 288 #define VFIO_REGION_INFO_CAP_TYPE 2 289 290 struct vfio_region_info_cap_type { 291 struct vfio_info_cap_header header; 292 __u32 type; /* global per bus driver */ 293 __u32 subtype; /* type specific */ 294 }; 295 296 #define VFIO_REGION_TYPE_PCI_VENDOR_TYPE (1 << 31) 297 #define VFIO_REGION_TYPE_PCI_VENDOR_MASK (0xffff) 298 299 /* 8086 Vendor sub-types */ 300 #define VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION (1) 301 #define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2) 302 #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3) 303 304 /** 305 * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9, 306 * struct vfio_irq_info) 307 * 308 * Retrieve information about a device IRQ. Caller provides 309 * struct vfio_irq_info with index value set. Caller sets argsz. 310 * Implementation of IRQ mapping is bus driver specific. Indexes 311 * using multiple IRQs are primarily intended to support MSI-like 312 * interrupt blocks. Zero count irq blocks may be used to describe 313 * unimplemented interrupt types. 314 * 315 * The EVENTFD flag indicates the interrupt index supports eventfd based 316 * signaling. 317 * 318 * The MASKABLE flags indicates the index supports MASK and UNMASK 319 * actions described below. 320 * 321 * AUTOMASKED indicates that after signaling, the interrupt line is 322 * automatically masked by VFIO and the user needs to unmask the line 323 * to receive new interrupts. This is primarily intended to distinguish 324 * level triggered interrupts. 325 * 326 * The NORESIZE flag indicates that the interrupt lines within the index 327 * are setup as a set and new subindexes cannot be enabled without first 328 * disabling the entire index. This is used for interrupts like PCI MSI 329 * and MSI-X where the driver may only use a subset of the available 330 * indexes, but VFIO needs to enable a specific number of vectors 331 * upfront. In the case of MSI-X, where the user can enable MSI-X and 332 * then add and unmask vectors, it's up to userspace to make the decision 333 * whether to allocate the maximum supported number of vectors or tear 334 * down setup and incrementally increase the vectors as each is enabled. 335 */ 336 struct vfio_irq_info { 337 __u32 argsz; 338 __u32 flags; 339 #define VFIO_IRQ_INFO_EVENTFD (1 << 0) 340 #define VFIO_IRQ_INFO_MASKABLE (1 << 1) 341 #define VFIO_IRQ_INFO_AUTOMASKED (1 << 2) 342 #define VFIO_IRQ_INFO_NORESIZE (1 << 3) 343 __u32 index; /* IRQ index */ 344 __u32 count; /* Number of IRQs within this index */ 345 }; 346 #define VFIO_DEVICE_GET_IRQ_INFO _IO(VFIO_TYPE, VFIO_BASE + 9) 347 348 /** 349 * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set) 350 * 351 * Set signaling, masking, and unmasking of interrupts. Caller provides 352 * struct vfio_irq_set with all fields set. 'start' and 'count' indicate 353 * the range of subindexes being specified. 354 * 355 * The DATA flags specify the type of data provided. If DATA_NONE, the 356 * operation performs the specified action immediately on the specified 357 * interrupt(s). For example, to unmask AUTOMASKED interrupt [0,0]: 358 * flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1. 359 * 360 * DATA_BOOL allows sparse support for the same on arrays of interrupts. 361 * For example, to mask interrupts [0,1] and [0,3] (but not [0,2]): 362 * flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3, 363 * data = {1,0,1} 364 * 365 * DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd. 366 * A value of -1 can be used to either de-assign interrupts if already 367 * assigned or skip un-assigned interrupts. For example, to set an eventfd 368 * to be trigger for interrupts [0,0] and [0,2]: 369 * flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3, 370 * data = {fd1, -1, fd2} 371 * If index [0,1] is previously set, two count = 1 ioctls calls would be 372 * required to set [0,0] and [0,2] without changing [0,1]. 373 * 374 * Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used 375 * with ACTION_TRIGGER to perform kernel level interrupt loopback testing 376 * from userspace (ie. simulate hardware triggering). 377 * 378 * Setting of an event triggering mechanism to userspace for ACTION_TRIGGER 379 * enables the interrupt index for the device. Individual subindex interrupts 380 * can be disabled using the -1 value for DATA_EVENTFD or the index can be 381 * disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0. 382 * 383 * Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while 384 * ACTION_TRIGGER specifies kernel->user signaling. 385 */ 386 struct vfio_irq_set { 387 __u32 argsz; 388 __u32 flags; 389 #define VFIO_IRQ_SET_DATA_NONE (1 << 0) /* Data not present */ 390 #define VFIO_IRQ_SET_DATA_BOOL (1 << 1) /* Data is bool (u8) */ 391 #define VFIO_IRQ_SET_DATA_EVENTFD (1 << 2) /* Data is eventfd (s32) */ 392 #define VFIO_IRQ_SET_ACTION_MASK (1 << 3) /* Mask interrupt */ 393 #define VFIO_IRQ_SET_ACTION_UNMASK (1 << 4) /* Unmask interrupt */ 394 #define VFIO_IRQ_SET_ACTION_TRIGGER (1 << 5) /* Trigger interrupt */ 395 __u32 index; 396 __u32 start; 397 __u32 count; 398 __u8 data[]; 399 }; 400 #define VFIO_DEVICE_SET_IRQS _IO(VFIO_TYPE, VFIO_BASE + 10) 401 402 #define VFIO_IRQ_SET_DATA_TYPE_MASK (VFIO_IRQ_SET_DATA_NONE | \ 403 VFIO_IRQ_SET_DATA_BOOL | \ 404 VFIO_IRQ_SET_DATA_EVENTFD) 405 #define VFIO_IRQ_SET_ACTION_TYPE_MASK (VFIO_IRQ_SET_ACTION_MASK | \ 406 VFIO_IRQ_SET_ACTION_UNMASK | \ 407 VFIO_IRQ_SET_ACTION_TRIGGER) 408 /** 409 * VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11) 410 * 411 * Reset a device. 412 */ 413 #define VFIO_DEVICE_RESET _IO(VFIO_TYPE, VFIO_BASE + 11) 414 415 /* 416 * The VFIO-PCI bus driver makes use of the following fixed region and 417 * IRQ index mapping. Unimplemented regions return a size of zero. 418 * Unimplemented IRQ types return a count of zero. 419 */ 420 421 enum { 422 VFIO_PCI_BAR0_REGION_INDEX, 423 VFIO_PCI_BAR1_REGION_INDEX, 424 VFIO_PCI_BAR2_REGION_INDEX, 425 VFIO_PCI_BAR3_REGION_INDEX, 426 VFIO_PCI_BAR4_REGION_INDEX, 427 VFIO_PCI_BAR5_REGION_INDEX, 428 VFIO_PCI_ROM_REGION_INDEX, 429 VFIO_PCI_CONFIG_REGION_INDEX, 430 /* 431 * Expose VGA regions defined for PCI base class 03, subclass 00. 432 * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df 433 * as well as the MMIO range 0xa0000 to 0xbffff. Each implemented 434 * range is found at it's identity mapped offset from the region 435 * offset, for example 0x3b0 is region_info.offset + 0x3b0. Areas 436 * between described ranges are unimplemented. 437 */ 438 VFIO_PCI_VGA_REGION_INDEX, 439 VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */ 440 /* device specific cap to define content. */ 441 }; 442 443 enum { 444 VFIO_PCI_INTX_IRQ_INDEX, 445 VFIO_PCI_MSI_IRQ_INDEX, 446 VFIO_PCI_MSIX_IRQ_INDEX, 447 VFIO_PCI_ERR_IRQ_INDEX, 448 VFIO_PCI_REQ_IRQ_INDEX, 449 VFIO_PCI_NUM_IRQS 450 }; 451 452 /* 453 * The vfio-ccw bus driver makes use of the following fixed region and 454 * IRQ index mapping. Unimplemented regions return a size of zero. 455 * Unimplemented IRQ types return a count of zero. 456 */ 457 458 enum { 459 VFIO_CCW_CONFIG_REGION_INDEX, 460 VFIO_CCW_NUM_REGIONS 461 }; 462 463 enum { 464 VFIO_CCW_IO_IRQ_INDEX, 465 VFIO_CCW_NUM_IRQS 466 }; 467 468 /** 469 * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12, 470 * struct vfio_pci_hot_reset_info) 471 * 472 * Return: 0 on success, -errno on failure: 473 * -enospc = insufficient buffer, -enodev = unsupported for device. 474 */ 475 struct vfio_pci_dependent_device { 476 __u32 group_id; 477 __u16 segment; 478 __u8 bus; 479 __u8 devfn; /* Use PCI_SLOT/PCI_FUNC */ 480 }; 481 482 struct vfio_pci_hot_reset_info { 483 __u32 argsz; 484 __u32 flags; 485 __u32 count; 486 struct vfio_pci_dependent_device devices[]; 487 }; 488 489 #define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) 490 491 /** 492 * VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13, 493 * struct vfio_pci_hot_reset) 494 * 495 * Return: 0 on success, -errno on failure. 496 */ 497 struct vfio_pci_hot_reset { 498 __u32 argsz; 499 __u32 flags; 500 __u32 count; 501 __s32 group_fds[]; 502 }; 503 504 #define VFIO_DEVICE_PCI_HOT_RESET _IO(VFIO_TYPE, VFIO_BASE + 13) 505 506 /* -------- API for Type1 VFIO IOMMU -------- */ 507 508 /** 509 * VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info) 510 * 511 * Retrieve information about the IOMMU object. Fills in provided 512 * struct vfio_iommu_info. Caller sets argsz. 513 * 514 * XXX Should we do these by CHECK_EXTENSION too? 515 */ 516 struct vfio_iommu_type1_info { 517 __u32 argsz; 518 __u32 flags; 519 #define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */ 520 __u64 iova_pgsizes; /* Bitmap of supported page sizes */ 521 }; 522 523 #define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) 524 525 /** 526 * VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map) 527 * 528 * Map process virtual addresses to IO virtual addresses using the 529 * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required. 530 */ 531 struct vfio_iommu_type1_dma_map { 532 __u32 argsz; 533 __u32 flags; 534 #define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device */ 535 #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */ 536 __u64 vaddr; /* Process virtual address */ 537 __u64 iova; /* IO virtual address */ 538 __u64 size; /* Size of mapping (bytes) */ 539 }; 540 541 #define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13) 542 543 /** 544 * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14, 545 * struct vfio_dma_unmap) 546 * 547 * Unmap IO virtual addresses using the provided struct vfio_dma_unmap. 548 * Caller sets argsz. The actual unmapped size is returned in the size 549 * field. No guarantee is made to the user that arbitrary unmaps of iova 550 * or size different from those used in the original mapping call will 551 * succeed. 552 */ 553 struct vfio_iommu_type1_dma_unmap { 554 __u32 argsz; 555 __u32 flags; 556 __u64 iova; /* IO virtual address */ 557 __u64 size; /* Size of mapping (bytes) */ 558 }; 559 560 #define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14) 561 562 /* 563 * IOCTLs to enable/disable IOMMU container usage. 564 * No parameters are supported. 565 */ 566 #define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15) 567 #define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16) 568 569 /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ 570 571 /* 572 * The SPAPR TCE DDW info struct provides the information about 573 * the details of Dynamic DMA window capability. 574 * 575 * @pgsizes contains a page size bitmask, 4K/64K/16M are supported. 576 * @max_dynamic_windows_supported tells the maximum number of windows 577 * which the platform can create. 578 * @levels tells the maximum number of levels in multi-level IOMMU tables; 579 * this allows splitting a table into smaller chunks which reduces 580 * the amount of physically contiguous memory required for the table. 581 */ 582 struct vfio_iommu_spapr_tce_ddw_info { 583 __u64 pgsizes; /* Bitmap of supported page sizes */ 584 __u32 max_dynamic_windows_supported; 585 __u32 levels; 586 }; 587 588 /* 589 * The SPAPR TCE info struct provides the information about the PCI bus 590 * address ranges available for DMA, these values are programmed into 591 * the hardware so the guest has to know that information. 592 * 593 * The DMA 32 bit window start is an absolute PCI bus address. 594 * The IOVA address passed via map/unmap ioctls are absolute PCI bus 595 * addresses too so the window works as a filter rather than an offset 596 * for IOVA addresses. 597 * 598 * Flags supported: 599 * - VFIO_IOMMU_SPAPR_INFO_DDW: informs the userspace that dynamic DMA windows 600 * (DDW) support is present. @ddw is only supported when DDW is present. 601 */ 602 struct vfio_iommu_spapr_tce_info { 603 __u32 argsz; 604 __u32 flags; 605 #define VFIO_IOMMU_SPAPR_INFO_DDW (1 << 0) /* DDW supported */ 606 __u32 dma32_window_start; /* 32 bit window start (bytes) */ 607 __u32 dma32_window_size; /* 32 bit window size (bytes) */ 608 struct vfio_iommu_spapr_tce_ddw_info ddw; 609 }; 610 611 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) 612 613 /* 614 * EEH PE operation struct provides ways to: 615 * - enable/disable EEH functionality; 616 * - unfreeze IO/DMA for frozen PE; 617 * - read PE state; 618 * - reset PE; 619 * - configure PE; 620 * - inject EEH error. 621 */ 622 struct vfio_eeh_pe_err { 623 __u32 type; 624 __u32 func; 625 __u64 addr; 626 __u64 mask; 627 }; 628 629 struct vfio_eeh_pe_op { 630 __u32 argsz; 631 __u32 flags; 632 __u32 op; 633 union { 634 struct vfio_eeh_pe_err err; 635 }; 636 }; 637 638 #define VFIO_EEH_PE_DISABLE 0 /* Disable EEH functionality */ 639 #define VFIO_EEH_PE_ENABLE 1 /* Enable EEH functionality */ 640 #define VFIO_EEH_PE_UNFREEZE_IO 2 /* Enable IO for frozen PE */ 641 #define VFIO_EEH_PE_UNFREEZE_DMA 3 /* Enable DMA for frozen PE */ 642 #define VFIO_EEH_PE_GET_STATE 4 /* PE state retrieval */ 643 #define VFIO_EEH_PE_STATE_NORMAL 0 /* PE in functional state */ 644 #define VFIO_EEH_PE_STATE_RESET 1 /* PE reset in progress */ 645 #define VFIO_EEH_PE_STATE_STOPPED 2 /* Stopped DMA and IO */ 646 #define VFIO_EEH_PE_STATE_STOPPED_DMA 4 /* Stopped DMA only */ 647 #define VFIO_EEH_PE_STATE_UNAVAIL 5 /* State unavailable */ 648 #define VFIO_EEH_PE_RESET_DEACTIVATE 5 /* Deassert PE reset */ 649 #define VFIO_EEH_PE_RESET_HOT 6 /* Assert hot reset */ 650 #define VFIO_EEH_PE_RESET_FUNDAMENTAL 7 /* Assert fundamental reset */ 651 #define VFIO_EEH_PE_CONFIGURE 8 /* PE configuration */ 652 #define VFIO_EEH_PE_INJECT_ERR 9 /* Inject EEH error */ 653 654 #define VFIO_EEH_PE_OP _IO(VFIO_TYPE, VFIO_BASE + 21) 655 656 /** 657 * VFIO_IOMMU_SPAPR_REGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 17, struct vfio_iommu_spapr_register_memory) 658 * 659 * Registers user space memory where DMA is allowed. It pins 660 * user pages and does the locked memory accounting so 661 * subsequent VFIO_IOMMU_MAP_DMA/VFIO_IOMMU_UNMAP_DMA calls 662 * get faster. 663 */ 664 struct vfio_iommu_spapr_register_memory { 665 __u32 argsz; 666 __u32 flags; 667 __u64 vaddr; /* Process virtual address */ 668 __u64 size; /* Size of mapping (bytes) */ 669 }; 670 #define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17) 671 672 /** 673 * VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 18, struct vfio_iommu_spapr_register_memory) 674 * 675 * Unregisters user space memory registered with 676 * VFIO_IOMMU_SPAPR_REGISTER_MEMORY. 677 * Uses vfio_iommu_spapr_register_memory for parameters. 678 */ 679 #define VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 18) 680 681 /** 682 * VFIO_IOMMU_SPAPR_TCE_CREATE - _IOWR(VFIO_TYPE, VFIO_BASE + 19, struct vfio_iommu_spapr_tce_create) 683 * 684 * Creates an additional TCE table and programs it (sets a new DMA window) 685 * to every IOMMU group in the container. It receives page shift, window 686 * size and number of levels in the TCE table being created. 687 * 688 * It allocates and returns an offset on a PCI bus of the new DMA window. 689 */ 690 struct vfio_iommu_spapr_tce_create { 691 __u32 argsz; 692 __u32 flags; 693 /* in */ 694 __u32 page_shift; 695 __u32 __resv1; 696 __u64 window_size; 697 __u32 levels; 698 __u32 __resv2; 699 /* out */ 700 __u64 start_addr; 701 }; 702 #define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19) 703 704 /** 705 * VFIO_IOMMU_SPAPR_TCE_REMOVE - _IOW(VFIO_TYPE, VFIO_BASE + 20, struct vfio_iommu_spapr_tce_remove) 706 * 707 * Unprograms a TCE table from all groups in the container and destroys it. 708 * It receives a PCI bus offset as a window id. 709 */ 710 struct vfio_iommu_spapr_tce_remove { 711 __u32 argsz; 712 __u32 flags; 713 /* in */ 714 __u64 start_addr; 715 }; 716 #define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20) 717 718 /* ***************************************************************** */ 719 720 #endif /* VFIO_H */ 721