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607ca46e DH |
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 _UAPIVFIO_H | |
12 | #define _UAPIVFIO_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 | |
5ffd229c | 25 | #define VFIO_SPAPR_TCE_IOMMU 2 |
1ef3e2bc | 26 | #define VFIO_TYPE1v2_IOMMU 3 |
aa429318 AW |
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 | |
607ca46e | 32 | |
1b69be5e GS |
33 | /* Check if EEH is supported */ |
34 | #define VFIO_EEH 5 | |
35 | ||
f5c9eceb WD |
36 | /* Two-stage IOMMU */ |
37 | #define VFIO_TYPE1_NESTING_IOMMU 6 /* Implies v2 */ | |
38 | ||
2157e7b8 AK |
39 | #define VFIO_SPAPR_TCE_v2_IOMMU 7 |
40 | ||
03a76b60 AW |
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 | ||
607ca46e DH |
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 | ||
c84982ad AW |
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 | ||
607ca46e DH |
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 */ | |
9df85aaa | 199 | #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2) /* vfio-platform device */ |
36fe431f | 200 | #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */ |
607ca46e DH |
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 */ | |
ff63eb63 | 224 | #define VFIO_REGION_INFO_FLAG_CAPS (1 << 3) /* Info supports caps */ |
607ca46e | 225 | __u32 index; /* Region index */ |
ff63eb63 | 226 | __u32 cap_offset; /* Offset within info struct of first cap */ |
607ca46e DH |
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 | ||
ff63eb63 AW |
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 | ||
c7bb4cb4 AW |
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 | ||
5846ff54 AW |
283 | #define VFIO_REGION_TYPE_PCI_VENDOR_TYPE (1 << 31) |
284 | #define VFIO_REGION_TYPE_PCI_VENDOR_MASK (0xffff) | |
285 | ||
f572a960 | 286 | /* 8086 Vendor sub-types */ |
5846ff54 | 287 | #define VFIO_REGION_SUBTYPE_INTEL_IGD_OPREGION (1) |
f572a960 AW |
288 | #define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2) |
289 | #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3) | |
5846ff54 | 290 | |
607ca46e DH |
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, | |
84237a82 AW |
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, | |
c7bb4cb4 AW |
426 | VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */ |
427 | /* device specific cap to define content. */ | |
607ca46e DH |
428 | }; |
429 | ||
430 | enum { | |
431 | VFIO_PCI_INTX_IRQ_INDEX, | |
432 | VFIO_PCI_MSI_IRQ_INDEX, | |
433 | VFIO_PCI_MSIX_IRQ_INDEX, | |
dad9f897 | 434 | VFIO_PCI_ERR_IRQ_INDEX, |
6140a8f5 | 435 | VFIO_PCI_REQ_IRQ_INDEX, |
607ca46e DH |
436 | VFIO_PCI_NUM_IRQS |
437 | }; | |
438 | ||
8b27ee60 AW |
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 | ||
607ca46e DH |
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 | /** | |
166fd7d9 AW |
515 | * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14, |
516 | * struct vfio_dma_unmap) | |
607ca46e DH |
517 | * |
518 | * Unmap IO virtual addresses using the provided struct vfio_dma_unmap. | |
166fd7d9 AW |
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. | |
607ca46e DH |
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 | ||
5ffd229c AK |
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 | ||
e633bc86 AK |
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 | ||
5ffd229c AK |
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 | * | |
e633bc86 AK |
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. | |
5ffd229c AK |
572 | */ |
573 | struct vfio_iommu_spapr_tce_info { | |
574 | __u32 argsz; | |
e633bc86 AK |
575 | __u32 flags; |
576 | #define VFIO_IOMMU_SPAPR_INFO_DDW (1 << 0) /* DDW supported */ | |
5ffd229c AK |
577 | __u32 dma32_window_start; /* 32 bit window start (bytes) */ |
578 | __u32 dma32_window_size; /* 32 bit window size (bytes) */ | |
e633bc86 | 579 | struct vfio_iommu_spapr_tce_ddw_info ddw; |
5ffd229c AK |
580 | }; |
581 | ||
582 | #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) | |
583 | ||
1b69be5e GS |
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; | |
68cbbc3a GS |
590 | * - configure PE; |
591 | * - inject EEH error. | |
1b69be5e | 592 | */ |
68cbbc3a GS |
593 | struct vfio_eeh_pe_err { |
594 | __u32 type; | |
595 | __u32 func; | |
596 | __u64 addr; | |
597 | __u64 mask; | |
598 | }; | |
599 | ||
1b69be5e GS |
600 | struct vfio_eeh_pe_op { |
601 | __u32 argsz; | |
602 | __u32 flags; | |
603 | __u32 op; | |
68cbbc3a GS |
604 | union { |
605 | struct vfio_eeh_pe_err err; | |
606 | }; | |
1b69be5e GS |
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 */ | |
68cbbc3a | 623 | #define VFIO_EEH_PE_INJECT_ERR 9 /* Inject EEH error */ |
1b69be5e GS |
624 | |
625 | #define VFIO_EEH_PE_OP _IO(VFIO_TYPE, VFIO_BASE + 21) | |
626 | ||
2157e7b8 AK |
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 | ||
e633bc86 AK |
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; | |
77d6bd47 | 666 | __u32 __resv1; |
e633bc86 AK |
667 | __u64 window_size; |
668 | __u32 levels; | |
77d6bd47 | 669 | __u32 __resv2; |
e633bc86 AK |
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 | ||
5ffd229c AK |
689 | /* ***************************************************************** */ |
690 | ||
607ca46e | 691 | #endif /* _UAPIVFIO_H */ |