summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
blob: 909da9cdda97f5e66497ea86a3992f8d2bd12fbe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
// SPDX-License-Identifier: GPL-2.0

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>

#include <linux/dma-buf.h>
#include <drm/drm.h>

#include "../../../../include/uapi/linux/dma-heap.h"

#define DEVPATH "/dev/dma_heap"

static int check_vgem(int fd)
{
	drm_version_t version = { 0 };
	char name[5];
	int ret;

	version.name_len = 4;
	version.name = name;

	ret = ioctl(fd, DRM_IOCTL_VERSION, &version);
	if (ret)
		return 0;

	return !strcmp(name, "vgem");
}

static int open_vgem(void)
{
	int i, fd;
	const char *drmstr = "/dev/dri/card";

	fd = -1;
	for (i = 0; i < 16; i++) {
		char name[80];

		snprintf(name, 80, "%s%u", drmstr, i);

		fd = open(name, O_RDWR);
		if (fd < 0)
			continue;

		if (!check_vgem(fd)) {
			close(fd);
			fd = -1;
			continue;
		} else {
			break;
		}
	}
	return fd;
}

static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle)
{
	struct drm_prime_handle import_handle = {
		.fd = dma_buf_fd,
		.flags = 0,
		.handle = 0,
	 };
	int ret;

	ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle);
	if (ret == 0)
		*handle = import_handle.handle;
	return ret;
}

static void close_handle(int vgem_fd, uint32_t handle)
{
	struct drm_gem_close close = {
		.handle = handle,
	};

	ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close);
}

static int dmabuf_heap_open(char *name)
{
	int ret, fd;
	char buf[256];

	ret = snprintf(buf, 256, "%s/%s", DEVPATH, name);
	if (ret < 0) {
		printf("snprintf failed!\n");
		return ret;
	}

	fd = open(buf, O_RDWR);
	if (fd < 0)
		printf("open %s failed!\n", buf);
	return fd;
}

static int dmabuf_heap_alloc_fdflags(int fd, size_t len, unsigned int fd_flags,
				     unsigned int heap_flags, int *dmabuf_fd)
{
	struct dma_heap_allocation_data data = {
		.len = len,
		.fd = 0,
		.fd_flags = fd_flags,
		.heap_flags = heap_flags,
	};
	int ret;

	if (!dmabuf_fd)
		return -EINVAL;

	ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
	if (ret < 0)
		return ret;
	*dmabuf_fd = (int)data.fd;
	return ret;
}

static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags,
			     int *dmabuf_fd)
{
	return dmabuf_heap_alloc_fdflags(fd, len, O_RDWR | O_CLOEXEC, flags,
					 dmabuf_fd);
}

static void dmabuf_sync(int fd, int start_stop)
{
	struct dma_buf_sync sync = {
		.flags = start_stop | DMA_BUF_SYNC_RW,
	};
	int ret;

	ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
	if (ret)
		printf("sync failed %d\n", errno);
}

#define ONE_MEG (1024 * 1024)

static int test_alloc_and_import(char *heap_name)
{
	int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
	uint32_t handle = 0;
	void *p = NULL;
	int ret;

	printf("Testing heap: %s\n", heap_name);

	heap_fd = dmabuf_heap_open(heap_name);
	if (heap_fd < 0)
		return -1;

	printf("Allocating 1 MEG\n");
	ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
	if (ret) {
		printf("Allocation Failed!\n");
		ret = -1;
		goto out;
	}
	/* mmap and write a simple pattern */
	p = mmap(NULL,
		 ONE_MEG,
		 PROT_READ | PROT_WRITE,
		 MAP_SHARED,
		 dmabuf_fd,
		 0);
	if (p == MAP_FAILED) {
		printf("mmap() failed: %m\n");
		ret = -1;
		goto out;
	}
	printf("mmap passed\n");

	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
	memset(p, 1, ONE_MEG / 2);
	memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2);
	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);

	importer_fd = open_vgem();
	if (importer_fd < 0) {
		ret = importer_fd;
		printf("Failed to open vgem\n");
		goto out;
	}

	ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
	if (ret < 0) {
		printf("Failed to import buffer\n");
		goto out;
	}
	printf("import passed\n");

	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
	memset(p, 0xff, ONE_MEG);
	dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
	printf("syncs passed\n");

	close_handle(importer_fd, handle);
	ret = 0;

out:
	if (p)
		munmap(p, ONE_MEG);
	if (importer_fd >= 0)
		close(importer_fd);
	if (dmabuf_fd >= 0)
		close(dmabuf_fd);
	if (heap_fd >= 0)
		close(heap_fd);

	return ret;
}

/* Test the ioctl version compatibility w/ a smaller structure then expected */
static int dmabuf_heap_alloc_older(int fd, size_t len, unsigned int flags,
				   int *dmabuf_fd)
{
	int ret;
	unsigned int older_alloc_ioctl;
	struct dma_heap_allocation_data_smaller {
		__u64 len;
		__u32 fd;
		__u32 fd_flags;
	} data = {
		.len = len,
		.fd = 0,
		.fd_flags = O_RDWR | O_CLOEXEC,
	};

	older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
				  struct dma_heap_allocation_data_smaller);
	if (!dmabuf_fd)
		return -EINVAL;

	ret = ioctl(fd, older_alloc_ioctl, &data);
	if (ret < 0)
		return ret;
	*dmabuf_fd = (int)data.fd;
	return ret;
}

/* Test the ioctl version compatibility w/ a larger structure then expected */
static int dmabuf_heap_alloc_newer(int fd, size_t len, unsigned int flags,
				   int *dmabuf_fd)
{
	int ret;
	unsigned int newer_alloc_ioctl;
	struct dma_heap_allocation_data_bigger {
		__u64 len;
		__u32 fd;
		__u32 fd_flags;
		__u64 heap_flags;
		__u64 garbage1;
		__u64 garbage2;
		__u64 garbage3;
	} data = {
		.len = len,
		.fd = 0,
		.fd_flags = O_RDWR | O_CLOEXEC,
		.heap_flags = flags,
		.garbage1 = 0xffffffff,
		.garbage2 = 0x88888888,
		.garbage3 = 0x11111111,
	};

	newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
				  struct dma_heap_allocation_data_bigger);
	if (!dmabuf_fd)
		return -EINVAL;

	ret = ioctl(fd, newer_alloc_ioctl, &data);
	if (ret < 0)
		return ret;

	*dmabuf_fd = (int)data.fd;
	return ret;
}

static int test_alloc_compat(char *heap_name)
{
	int heap_fd = -1, dmabuf_fd = -1;
	int ret;

	heap_fd = dmabuf_heap_open(heap_name);
	if (heap_fd < 0)
		return -1;

	printf("Testing (theoretical)older alloc compat\n");
	ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
	if (ret) {
		printf("Older compat allocation failed!\n");
		ret = -1;
		goto out;
	}
	close(dmabuf_fd);

	printf("Testing (theoretical)newer alloc compat\n");
	ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
	if (ret) {
		printf("Newer compat allocation failed!\n");
		ret = -1;
		goto out;
	}
	printf("Ioctl compatibility tests passed\n");
out:
	if (dmabuf_fd >= 0)
		close(dmabuf_fd);
	if (heap_fd >= 0)
		close(heap_fd);

	return ret;
}

static int test_alloc_errors(char *heap_name)
{
	int heap_fd = -1, dmabuf_fd = -1;
	int ret;

	heap_fd = dmabuf_heap_open(heap_name);
	if (heap_fd < 0)
		return -1;

	printf("Testing expected error cases\n");
	ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
	if (!ret) {
		printf("Did not see expected error (invalid fd)!\n");
		ret = -1;
		goto out;
	}

	ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
	if (!ret) {
		printf("Did not see expected error (invalid heap flags)!\n");
		ret = -1;
		goto out;
	}

	ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
					~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
	if (!ret) {
		printf("Did not see expected error (invalid fd flags)!\n");
		ret = -1;
		goto out;
	}

	printf("Expected error checking passed\n");
	ret = 0;
out:
	if (dmabuf_fd >= 0)
		close(dmabuf_fd);
	if (heap_fd >= 0)
		close(heap_fd);

	return ret;
}

int main(void)
{
	DIR *d;
	struct dirent *dir;
	int ret = -1;

	d = opendir(DEVPATH);
	if (!d) {
		printf("No %s directory?\n", DEVPATH);
		return -1;
	}

	while ((dir = readdir(d)) != NULL) {
		if (!strncmp(dir->d_name, ".", 2))
			continue;
		if (!strncmp(dir->d_name, "..", 3))
			continue;

		ret = test_alloc_and_import(dir->d_name);
		if (ret)
			break;

		ret = test_alloc_compat(dir->d_name);
		if (ret)
			break;

		ret = test_alloc_errors(dir->d_name);
		if (ret)
			break;
	}
	closedir(d);

	return ret;
}