1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */
3#ifndef __SELFTEST_IOMMUFD_UTILS
4#define __SELFTEST_IOMMUFD_UTILS
5
6#include <unistd.h>
7#include <stddef.h>
8#include <sys/fcntl.h>
9#include <sys/ioctl.h>
10#include <stdint.h>
11#include <assert.h>
12
13#include "../kselftest_harness.h"
14#include "../../../../drivers/iommu/iommufd/iommufd_test.h"
15
16/* Hack to make assertions more readable */
17#define _IOMMU_TEST_CMD(x) IOMMU_TEST_CMD
18
19/* Imported from include/asm-generic/bitops/generic-non-atomic.h */
20#define BITS_PER_BYTE 8
21#define BITS_PER_LONG __BITS_PER_LONG
22#define BIT_MASK(nr) (1UL << ((nr) % __BITS_PER_LONG))
23#define BIT_WORD(nr) ((nr) / __BITS_PER_LONG)
24
25static inline void set_bit(unsigned int nr, unsigned long *addr)
26{
27 unsigned long mask = BIT_MASK(nr);
28 unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
29
30 *p |= mask;
31}
32
33static inline bool test_bit(unsigned int nr, unsigned long *addr)
34{
35 return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_LONG - 1)));
36}
37
38static void *buffer;
39static unsigned long BUFFER_SIZE;
40
41static unsigned long PAGE_SIZE;
42
43#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
44#define offsetofend(TYPE, MEMBER) \
45 (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
46
47/*
48 * Have the kernel check the refcount on pages. I don't know why a freshly
49 * mmap'd anon non-compound page starts out with a ref of 3
50 */
51#define check_refs(_ptr, _length, _refs) \
52 ({ \
53 struct iommu_test_cmd test_cmd = { \
54 .size = sizeof(test_cmd), \
55 .op = IOMMU_TEST_OP_MD_CHECK_REFS, \
56 .check_refs = { .length = _length, \
57 .uptr = (uintptr_t)(_ptr), \
58 .refs = _refs }, \
59 }; \
60 ASSERT_EQ(0, \
61 ioctl(self->fd, \
62 _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_REFS), \
63 &test_cmd)); \
64 })
65
66static int _test_cmd_mock_domain(int fd, unsigned int ioas_id, __u32 *stdev_id,
67 __u32 *hwpt_id, __u32 *idev_id)
68{
69 struct iommu_test_cmd cmd = {
70 .size = sizeof(cmd),
71 .op = IOMMU_TEST_OP_MOCK_DOMAIN,
72 .id = ioas_id,
73 .mock_domain = {},
74 };
75 int ret;
76
77 ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
78 if (ret)
79 return ret;
80 if (stdev_id)
81 *stdev_id = cmd.mock_domain.out_stdev_id;
82 assert(cmd.id != 0);
83 if (hwpt_id)
84 *hwpt_id = cmd.mock_domain.out_hwpt_id;
85 if (idev_id)
86 *idev_id = cmd.mock_domain.out_idev_id;
87 return 0;
88}
89#define test_cmd_mock_domain(ioas_id, stdev_id, hwpt_id, idev_id) \
90 ASSERT_EQ(0, _test_cmd_mock_domain(self->fd, ioas_id, stdev_id, \
91 hwpt_id, idev_id))
92#define test_err_mock_domain(_errno, ioas_id, stdev_id, hwpt_id) \
93 EXPECT_ERRNO(_errno, _test_cmd_mock_domain(self->fd, ioas_id, \
94 stdev_id, hwpt_id, NULL))
95
96static int _test_cmd_mock_domain_flags(int fd, unsigned int ioas_id,
97 __u32 stdev_flags, __u32 *stdev_id,
98 __u32 *hwpt_id, __u32 *idev_id)
99{
100 struct iommu_test_cmd cmd = {
101 .size = sizeof(cmd),
102 .op = IOMMU_TEST_OP_MOCK_DOMAIN_FLAGS,
103 .id = ioas_id,
104 .mock_domain_flags = { .dev_flags = stdev_flags },
105 };
106 int ret;
107
108 ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
109 if (ret)
110 return ret;
111 if (stdev_id)
112 *stdev_id = cmd.mock_domain_flags.out_stdev_id;
113 assert(cmd.id != 0);
114 if (hwpt_id)
115 *hwpt_id = cmd.mock_domain_flags.out_hwpt_id;
116 if (idev_id)
117 *idev_id = cmd.mock_domain_flags.out_idev_id;
118 return 0;
119}
120#define test_cmd_mock_domain_flags(ioas_id, flags, stdev_id, hwpt_id, idev_id) \
121 ASSERT_EQ(0, _test_cmd_mock_domain_flags(self->fd, ioas_id, flags, \
122 stdev_id, hwpt_id, idev_id))
123#define test_err_mock_domain_flags(_errno, ioas_id, flags, stdev_id, hwpt_id) \
124 EXPECT_ERRNO(_errno, \
125 _test_cmd_mock_domain_flags(self->fd, ioas_id, flags, \
126 stdev_id, hwpt_id, NULL))
127
128static int _test_cmd_mock_domain_replace(int fd, __u32 stdev_id, __u32 pt_id,
129 __u32 *hwpt_id)
130{
131 struct iommu_test_cmd cmd = {
132 .size = sizeof(cmd),
133 .op = IOMMU_TEST_OP_MOCK_DOMAIN_REPLACE,
134 .id = stdev_id,
135 .mock_domain_replace = {
136 .pt_id = pt_id,
137 },
138 };
139 int ret;
140
141 ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
142 if (ret)
143 return ret;
144 if (hwpt_id)
145 *hwpt_id = cmd.mock_domain_replace.pt_id;
146 return 0;
147}
148
149#define test_cmd_mock_domain_replace(stdev_id, pt_id) \
150 ASSERT_EQ(0, _test_cmd_mock_domain_replace(self->fd, stdev_id, pt_id, \
151 NULL))
152#define test_err_mock_domain_replace(_errno, stdev_id, pt_id) \
153 EXPECT_ERRNO(_errno, _test_cmd_mock_domain_replace(self->fd, stdev_id, \
154 pt_id, NULL))
155
156static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id,
157 __u32 flags, __u32 *hwpt_id, __u32 data_type,
158 void *data, size_t data_len)
159{
160 struct iommu_hwpt_alloc cmd = {
161 .size = sizeof(cmd),
162 .flags = flags,
163 .dev_id = device_id,
164 .pt_id = pt_id,
165 .data_type = data_type,
166 .data_len = data_len,
167 .data_uptr = (uint64_t)data,
168 };
169 int ret;
170
171 ret = ioctl(fd, IOMMU_HWPT_ALLOC, &cmd);
172 if (ret)
173 return ret;
174 if (hwpt_id)
175 *hwpt_id = cmd.out_hwpt_id;
176 return 0;
177}
178
179#define test_cmd_hwpt_alloc(device_id, pt_id, flags, hwpt_id) \
180 ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
181 hwpt_id, IOMMU_HWPT_DATA_NONE, NULL, \
182 0))
183#define test_err_hwpt_alloc(_errno, device_id, pt_id, flags, hwpt_id) \
184 EXPECT_ERRNO(_errno, _test_cmd_hwpt_alloc( \
185 self->fd, device_id, pt_id, flags, \
186 hwpt_id, IOMMU_HWPT_DATA_NONE, NULL, 0))
187
188#define test_cmd_hwpt_alloc_nested(device_id, pt_id, flags, hwpt_id, \
189 data_type, data, data_len) \
190 ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
191 hwpt_id, data_type, data, data_len))
192#define test_err_hwpt_alloc_nested(_errno, device_id, pt_id, flags, hwpt_id, \
193 data_type, data, data_len) \
194 EXPECT_ERRNO(_errno, \
195 _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, flags, \
196 hwpt_id, data_type, data, data_len))
197
198#define test_cmd_hwpt_check_iotlb(hwpt_id, iotlb_id, expected) \
199 ({ \
200 struct iommu_test_cmd test_cmd = { \
201 .size = sizeof(test_cmd), \
202 .op = IOMMU_TEST_OP_MD_CHECK_IOTLB, \
203 .id = hwpt_id, \
204 .check_iotlb = { \
205 .id = iotlb_id, \
206 .iotlb = expected, \
207 }, \
208 }; \
209 ASSERT_EQ(0, \
210 ioctl(self->fd, \
211 _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_IOTLB), \
212 &test_cmd)); \
213 })
214
215#define test_cmd_hwpt_check_iotlb_all(hwpt_id, expected) \
216 ({ \
217 int i; \
218 for (i = 0; i < MOCK_NESTED_DOMAIN_IOTLB_NUM; i++) \
219 test_cmd_hwpt_check_iotlb(hwpt_id, i, expected); \
220 })
221
222static int _test_cmd_hwpt_invalidate(int fd, __u32 hwpt_id, void *reqs,
223 uint32_t data_type, uint32_t lreq,
224 uint32_t *nreqs)
225{
226 struct iommu_hwpt_invalidate cmd = {
227 .size = sizeof(cmd),
228 .hwpt_id = hwpt_id,
229 .data_type = data_type,
230 .data_uptr = (uint64_t)reqs,
231 .entry_len = lreq,
232 .entry_num = *nreqs,
233 };
234 int rc = ioctl(fd, IOMMU_HWPT_INVALIDATE, &cmd);
235 *nreqs = cmd.entry_num;
236 return rc;
237}
238
239#define test_cmd_hwpt_invalidate(hwpt_id, reqs, data_type, lreq, nreqs) \
240 ({ \
241 ASSERT_EQ(0, \
242 _test_cmd_hwpt_invalidate(self->fd, hwpt_id, reqs, \
243 data_type, lreq, nreqs)); \
244 })
245#define test_err_hwpt_invalidate(_errno, hwpt_id, reqs, data_type, lreq, \
246 nreqs) \
247 ({ \
248 EXPECT_ERRNO(_errno, _test_cmd_hwpt_invalidate( \
249 self->fd, hwpt_id, reqs, \
250 data_type, lreq, nreqs)); \
251 })
252
253static int _test_cmd_access_replace_ioas(int fd, __u32 access_id,
254 unsigned int ioas_id)
255{
256 struct iommu_test_cmd cmd = {
257 .size = sizeof(cmd),
258 .op = IOMMU_TEST_OP_ACCESS_REPLACE_IOAS,
259 .id = access_id,
260 .access_replace_ioas = { .ioas_id = ioas_id },
261 };
262 int ret;
263
264 ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
265 if (ret)
266 return ret;
267 return 0;
268}
269#define test_cmd_access_replace_ioas(access_id, ioas_id) \
270 ASSERT_EQ(0, _test_cmd_access_replace_ioas(self->fd, access_id, ioas_id))
271
272static int _test_cmd_set_dirty_tracking(int fd, __u32 hwpt_id, bool enabled)
273{
274 struct iommu_hwpt_set_dirty_tracking cmd = {
275 .size = sizeof(cmd),
276 .flags = enabled ? IOMMU_HWPT_DIRTY_TRACKING_ENABLE : 0,
277 .hwpt_id = hwpt_id,
278 };
279 int ret;
280
281 ret = ioctl(fd, IOMMU_HWPT_SET_DIRTY_TRACKING, &cmd);
282 if (ret)
283 return -errno;
284 return 0;
285}
286#define test_cmd_set_dirty_tracking(hwpt_id, enabled) \
287 ASSERT_EQ(0, _test_cmd_set_dirty_tracking(self->fd, hwpt_id, enabled))
288
289static int _test_cmd_get_dirty_bitmap(int fd, __u32 hwpt_id, size_t length,
290 __u64 iova, size_t page_size,
291 __u64 *bitmap, __u32 flags)
292{
293 struct iommu_hwpt_get_dirty_bitmap cmd = {
294 .size = sizeof(cmd),
295 .hwpt_id = hwpt_id,
296 .flags = flags,
297 .iova = iova,
298 .length = length,
299 .page_size = page_size,
300 .data = (uintptr_t)bitmap,
301 };
302 int ret;
303
304 ret = ioctl(fd, IOMMU_HWPT_GET_DIRTY_BITMAP, &cmd);
305 if (ret)
306 return ret;
307 return 0;
308}
309
310#define test_cmd_get_dirty_bitmap(fd, hwpt_id, length, iova, page_size, \
311 bitmap, flags) \
312 ASSERT_EQ(0, _test_cmd_get_dirty_bitmap(fd, hwpt_id, length, iova, \
313 page_size, bitmap, flags))
314
315static int _test_cmd_mock_domain_set_dirty(int fd, __u32 hwpt_id, size_t length,
316 __u64 iova, size_t page_size,
317 __u64 *bitmap, __u64 *dirty)
318{
319 struct iommu_test_cmd cmd = {
320 .size = sizeof(cmd),
321 .op = IOMMU_TEST_OP_DIRTY,
322 .id = hwpt_id,
323 .dirty = {
324 .iova = iova,
325 .length = length,
326 .page_size = page_size,
327 .uptr = (uintptr_t)bitmap,
328 }
329 };
330 int ret;
331
332 ret = ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_DIRTY), &cmd);
333 if (ret)
334 return -ret;
335 if (dirty)
336 *dirty = cmd.dirty.out_nr_dirty;
337 return 0;
338}
339
340#define test_cmd_mock_domain_set_dirty(fd, hwpt_id, length, iova, page_size, \
341 bitmap, nr) \
342 ASSERT_EQ(0, \
343 _test_cmd_mock_domain_set_dirty(fd, hwpt_id, length, iova, \
344 page_size, bitmap, nr))
345
346static int _test_mock_dirty_bitmaps(int fd, __u32 hwpt_id, size_t length,
347 __u64 iova, size_t page_size,
348 size_t pte_page_size, __u64 *bitmap,
349 __u64 bitmap_size, __u32 flags,
350 struct __test_metadata *_metadata)
351{
352 unsigned long npte = pte_page_size / page_size, pteset = 2 * npte;
353 unsigned long nbits = bitmap_size * BITS_PER_BYTE;
354 unsigned long j, i, nr = nbits / pteset ?: 1;
355 __u64 out_dirty = 0;
356
357 /* Mark all even bits as dirty in the mock domain */
358 memset(bitmap, 0, bitmap_size);
359 for (i = 0; i < nbits; i += pteset)
360 set_bit(nr: i, addr: (unsigned long *)bitmap);
361
362 test_cmd_mock_domain_set_dirty(fd, hwpt_id, length, iova, page_size,
363 bitmap, &out_dirty);
364 ASSERT_EQ(nr, out_dirty);
365
366 /* Expect all even bits as dirty in the user bitmap */
367 memset(bitmap, 0, bitmap_size);
368 test_cmd_get_dirty_bitmap(fd, hwpt_id, length, iova, page_size, bitmap,
369 flags);
370 /* Beware ASSERT_EQ() is two statements -- braces are not redundant! */
371 for (i = 0; i < nbits; i += pteset) {
372 for (j = 0; j < pteset; j++) {
373 ASSERT_EQ(j < npte,
374 test_bit(i + j, (unsigned long *)bitmap));
375 }
376 ASSERT_EQ(!(i % pteset), test_bit(i, (unsigned long *)bitmap));
377 }
378
379 memset(bitmap, 0, bitmap_size);
380 test_cmd_get_dirty_bitmap(fd, hwpt_id, length, iova, page_size, bitmap,
381 flags);
382
383 /* It as read already -- expect all zeroes */
384 for (i = 0; i < nbits; i += pteset) {
385 for (j = 0; j < pteset; j++) {
386 ASSERT_EQ(
387 (j < npte) &&
388 (flags &
389 IOMMU_HWPT_GET_DIRTY_BITMAP_NO_CLEAR),
390 test_bit(i + j, (unsigned long *)bitmap));
391 }
392 }
393
394 return 0;
395}
396#define test_mock_dirty_bitmaps(hwpt_id, length, iova, page_size, pte_size,\
397 bitmap, bitmap_size, flags, _metadata) \
398 ASSERT_EQ(0, _test_mock_dirty_bitmaps(self->fd, hwpt_id, length, iova, \
399 page_size, pte_size, bitmap, \
400 bitmap_size, flags, _metadata))
401
402static int _test_cmd_create_access(int fd, unsigned int ioas_id,
403 __u32 *access_id, unsigned int flags)
404{
405 struct iommu_test_cmd cmd = {
406 .size = sizeof(cmd),
407 .op = IOMMU_TEST_OP_CREATE_ACCESS,
408 .id = ioas_id,
409 .create_access = { .flags = flags },
410 };
411 int ret;
412
413 ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
414 if (ret)
415 return ret;
416 *access_id = cmd.create_access.out_access_fd;
417 return 0;
418}
419#define test_cmd_create_access(ioas_id, access_id, flags) \
420 ASSERT_EQ(0, _test_cmd_create_access(self->fd, ioas_id, access_id, \
421 flags))
422
423static int _test_cmd_destroy_access(unsigned int access_id)
424{
425 return close(access_id);
426}
427#define test_cmd_destroy_access(access_id) \
428 ASSERT_EQ(0, _test_cmd_destroy_access(access_id))
429
430static int _test_cmd_destroy_access_pages(int fd, unsigned int access_id,
431 unsigned int access_pages_id)
432{
433 struct iommu_test_cmd cmd = {
434 .size = sizeof(cmd),
435 .op = IOMMU_TEST_OP_DESTROY_ACCESS_PAGES,
436 .id = access_id,
437 .destroy_access_pages = { .access_pages_id = access_pages_id },
438 };
439 return ioctl(fd, IOMMU_TEST_CMD, &cmd);
440}
441#define test_cmd_destroy_access_pages(access_id, access_pages_id) \
442 ASSERT_EQ(0, _test_cmd_destroy_access_pages(self->fd, access_id, \
443 access_pages_id))
444#define test_err_destroy_access_pages(_errno, access_id, access_pages_id) \
445 EXPECT_ERRNO(_errno, _test_cmd_destroy_access_pages( \
446 self->fd, access_id, access_pages_id))
447
448static int _test_ioctl_destroy(int fd, unsigned int id)
449{
450 struct iommu_destroy cmd = {
451 .size = sizeof(cmd),
452 .id = id,
453 };
454 return ioctl(fd, IOMMU_DESTROY, &cmd);
455}
456#define test_ioctl_destroy(id) ASSERT_EQ(0, _test_ioctl_destroy(self->fd, id))
457
458static int _test_ioctl_ioas_alloc(int fd, __u32 *id)
459{
460 struct iommu_ioas_alloc cmd = {
461 .size = sizeof(cmd),
462 };
463 int ret;
464
465 ret = ioctl(fd, IOMMU_IOAS_ALLOC, &cmd);
466 if (ret)
467 return ret;
468 *id = cmd.out_ioas_id;
469 return 0;
470}
471#define test_ioctl_ioas_alloc(id) \
472 ({ \
473 ASSERT_EQ(0, _test_ioctl_ioas_alloc(self->fd, id)); \
474 ASSERT_NE(0, *(id)); \
475 })
476
477static int _test_ioctl_ioas_map(int fd, unsigned int ioas_id, void *buffer,
478 size_t length, __u64 *iova, unsigned int flags)
479{
480 struct iommu_ioas_map cmd = {
481 .size = sizeof(cmd),
482 .flags = flags,
483 .ioas_id = ioas_id,
484 .user_va = (uintptr_t)buffer,
485 .length = length,
486 };
487 int ret;
488
489 if (flags & IOMMU_IOAS_MAP_FIXED_IOVA)
490 cmd.iova = *iova;
491
492 ret = ioctl(fd, IOMMU_IOAS_MAP, &cmd);
493 *iova = cmd.iova;
494 return ret;
495}
496#define test_ioctl_ioas_map(buffer, length, iova_p) \
497 ASSERT_EQ(0, _test_ioctl_ioas_map(self->fd, self->ioas_id, buffer, \
498 length, iova_p, \
499 IOMMU_IOAS_MAP_WRITEABLE | \
500 IOMMU_IOAS_MAP_READABLE))
501
502#define test_err_ioctl_ioas_map(_errno, buffer, length, iova_p) \
503 EXPECT_ERRNO(_errno, \
504 _test_ioctl_ioas_map(self->fd, self->ioas_id, buffer, \
505 length, iova_p, \
506 IOMMU_IOAS_MAP_WRITEABLE | \
507 IOMMU_IOAS_MAP_READABLE))
508
509#define test_ioctl_ioas_map_id(ioas_id, buffer, length, iova_p) \
510 ASSERT_EQ(0, _test_ioctl_ioas_map(self->fd, ioas_id, buffer, length, \
511 iova_p, \
512 IOMMU_IOAS_MAP_WRITEABLE | \
513 IOMMU_IOAS_MAP_READABLE))
514
515#define test_ioctl_ioas_map_fixed(buffer, length, iova) \
516 ({ \
517 __u64 __iova = iova; \
518 ASSERT_EQ(0, _test_ioctl_ioas_map( \
519 self->fd, self->ioas_id, buffer, length, \
520 &__iova, \
521 IOMMU_IOAS_MAP_FIXED_IOVA | \
522 IOMMU_IOAS_MAP_WRITEABLE | \
523 IOMMU_IOAS_MAP_READABLE)); \
524 })
525
526#define test_ioctl_ioas_map_fixed_id(ioas_id, buffer, length, iova) \
527 ({ \
528 __u64 __iova = iova; \
529 ASSERT_EQ(0, \
530 _test_ioctl_ioas_map( \
531 self->fd, ioas_id, buffer, length, &__iova, \
532 IOMMU_IOAS_MAP_FIXED_IOVA | \
533 IOMMU_IOAS_MAP_WRITEABLE | \
534 IOMMU_IOAS_MAP_READABLE)); \
535 })
536
537#define test_err_ioctl_ioas_map_fixed(_errno, buffer, length, iova) \
538 ({ \
539 __u64 __iova = iova; \
540 EXPECT_ERRNO(_errno, \
541 _test_ioctl_ioas_map( \
542 self->fd, self->ioas_id, buffer, length, \
543 &__iova, \
544 IOMMU_IOAS_MAP_FIXED_IOVA | \
545 IOMMU_IOAS_MAP_WRITEABLE | \
546 IOMMU_IOAS_MAP_READABLE)); \
547 })
548
549static int _test_ioctl_ioas_unmap(int fd, unsigned int ioas_id, uint64_t iova,
550 size_t length, uint64_t *out_len)
551{
552 struct iommu_ioas_unmap cmd = {
553 .size = sizeof(cmd),
554 .ioas_id = ioas_id,
555 .iova = iova,
556 .length = length,
557 };
558 int ret;
559
560 ret = ioctl(fd, IOMMU_IOAS_UNMAP, &cmd);
561 if (out_len)
562 *out_len = cmd.length;
563 return ret;
564}
565#define test_ioctl_ioas_unmap(iova, length) \
566 ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, iova, \
567 length, NULL))
568
569#define test_ioctl_ioas_unmap_id(ioas_id, iova, length) \
570 ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, ioas_id, iova, length, \
571 NULL))
572
573#define test_err_ioctl_ioas_unmap(_errno, iova, length) \
574 EXPECT_ERRNO(_errno, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, \
575 iova, length, NULL))
576
577static int _test_ioctl_set_temp_memory_limit(int fd, unsigned int limit)
578{
579 struct iommu_test_cmd memlimit_cmd = {
580 .size = sizeof(memlimit_cmd),
581 .op = IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT,
582 .memory_limit = { .limit = limit },
583 };
584
585 return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT),
586 &memlimit_cmd);
587}
588
589#define test_ioctl_set_temp_memory_limit(limit) \
590 ASSERT_EQ(0, _test_ioctl_set_temp_memory_limit(self->fd, limit))
591
592#define test_ioctl_set_default_memory_limit() \
593 test_ioctl_set_temp_memory_limit(65536)
594
595static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
596{
597 struct iommu_test_cmd test_cmd = {
598 .size = sizeof(test_cmd),
599 .op = IOMMU_TEST_OP_MD_CHECK_REFS,
600 .check_refs = { .length = BUFFER_SIZE,
601 .uptr = (uintptr_t)buffer },
602 };
603
604 if (fd == -1)
605 return;
606
607 EXPECT_EQ(0, close(fd));
608
609 fd = open("/dev/iommu", O_RDWR);
610 EXPECT_NE(-1, fd);
611 EXPECT_EQ(0, ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_REFS),
612 &test_cmd));
613 EXPECT_EQ(0, close(fd));
614}
615
616#define EXPECT_ERRNO(expected_errno, cmd) \
617 ({ \
618 ASSERT_EQ(-1, cmd); \
619 EXPECT_EQ(expected_errno, errno); \
620 })
621
622#endif
623
624/* @data can be NULL */
625static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data,
626 size_t data_len, uint32_t *capabilities)
627{
628 struct iommu_test_hw_info *info = (struct iommu_test_hw_info *)data;
629 struct iommu_hw_info cmd = {
630 .size = sizeof(cmd),
631 .dev_id = device_id,
632 .data_len = data_len,
633 .data_uptr = (uint64_t)data,
634 .out_capabilities = 0,
635 };
636 int ret;
637
638 ret = ioctl(fd, IOMMU_GET_HW_INFO, &cmd);
639 if (ret)
640 return ret;
641
642 assert(cmd.out_data_type == IOMMU_HW_INFO_TYPE_SELFTEST);
643
644 /*
645 * The struct iommu_test_hw_info should be the one defined
646 * by the current kernel.
647 */
648 assert(cmd.data_len == sizeof(struct iommu_test_hw_info));
649
650 /*
651 * Trailing bytes should be 0 if user buffer is larger than
652 * the data that kernel reports.
653 */
654 if (data_len > cmd.data_len) {
655 char *ptr = (char *)(data + cmd.data_len);
656 int idx = 0;
657
658 while (idx < data_len - cmd.data_len) {
659 assert(!*(ptr + idx));
660 idx++;
661 }
662 }
663
664 if (info) {
665 if (data_len >= offsetofend(struct iommu_test_hw_info, test_reg))
666 assert(info->test_reg == IOMMU_HW_INFO_SELFTEST_REGVAL);
667 if (data_len >= offsetofend(struct iommu_test_hw_info, flags))
668 assert(!info->flags);
669 }
670
671 if (capabilities)
672 *capabilities = cmd.out_capabilities;
673
674 return 0;
675}
676
677#define test_cmd_get_hw_info(device_id, data, data_len) \
678 ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, data, \
679 data_len, NULL))
680
681#define test_err_get_hw_info(_errno, device_id, data, data_len) \
682 EXPECT_ERRNO(_errno, _test_cmd_get_hw_info(self->fd, device_id, data, \
683 data_len, NULL))
684
685#define test_cmd_get_hw_capabilities(device_id, caps, mask) \
686 ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, NULL, 0, &caps))
687

source code of linux/tools/testing/selftests/iommu/iommufd_utils.h