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a8779927 JS |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | #include <dirent.h> | |
4 | #include <errno.h> | |
5 | #include <fcntl.h> | |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <stdint.h> | |
9 | #include <string.h> | |
10 | #include <unistd.h> | |
11 | #include <sys/ioctl.h> | |
12 | #include <sys/mman.h> | |
13 | #include <sys/types.h> | |
14 | ||
15 | #include <linux/dma-buf.h> | |
16 | #include <drm/drm.h> | |
17 | ||
18 | #include "../../../../include/uapi/linux/dma-heap.h" | |
19 | ||
20 | #define DEVPATH "/dev/dma_heap" | |
21 | ||
22 | static int check_vgem(int fd) | |
23 | { | |
24 | drm_version_t version = { 0 }; | |
25 | char name[5]; | |
26 | int ret; | |
27 | ||
28 | version.name_len = 4; | |
29 | version.name = name; | |
30 | ||
31 | ret = ioctl(fd, DRM_IOCTL_VERSION, &version); | |
32 | if (ret) | |
33 | return 0; | |
34 | ||
35 | return !strcmp(name, "vgem"); | |
36 | } | |
37 | ||
38 | static int open_vgem(void) | |
39 | { | |
40 | int i, fd; | |
41 | const char *drmstr = "/dev/dri/card"; | |
42 | ||
43 | fd = -1; | |
44 | for (i = 0; i < 16; i++) { | |
45 | char name[80]; | |
46 | ||
47 | snprintf(name, 80, "%s%u", drmstr, i); | |
48 | ||
49 | fd = open(name, O_RDWR); | |
50 | if (fd < 0) | |
51 | continue; | |
52 | ||
53 | if (!check_vgem(fd)) { | |
54 | close(fd); | |
55 | fd = -1; | |
56 | continue; | |
57 | } else { | |
58 | break; | |
59 | } | |
60 | } | |
61 | return fd; | |
62 | } | |
63 | ||
64 | static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle) | |
65 | { | |
66 | struct drm_prime_handle import_handle = { | |
67 | .fd = dma_buf_fd, | |
68 | .flags = 0, | |
69 | .handle = 0, | |
70 | }; | |
71 | int ret; | |
72 | ||
73 | ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle); | |
74 | if (ret == 0) | |
75 | *handle = import_handle.handle; | |
76 | return ret; | |
77 | } | |
78 | ||
79 | static void close_handle(int vgem_fd, uint32_t handle) | |
80 | { | |
81 | struct drm_gem_close close = { | |
82 | .handle = handle, | |
83 | }; | |
84 | ||
85 | ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close); | |
86 | } | |
87 | ||
88 | static int dmabuf_heap_open(char *name) | |
89 | { | |
90 | int ret, fd; | |
91 | char buf[256]; | |
92 | ||
93 | ret = snprintf(buf, 256, "%s/%s", DEVPATH, name); | |
94 | if (ret < 0) { | |
95 | printf("snprintf failed!\n"); | |
96 | return ret; | |
97 | } | |
98 | ||
99 | fd = open(buf, O_RDWR); | |
100 | if (fd < 0) | |
101 | printf("open %s failed!\n", buf); | |
102 | return fd; | |
103 | } | |
104 | ||
105 | static int dmabuf_heap_alloc_fdflags(int fd, size_t len, unsigned int fd_flags, | |
106 | unsigned int heap_flags, int *dmabuf_fd) | |
107 | { | |
108 | struct dma_heap_allocation_data data = { | |
109 | .len = len, | |
110 | .fd = 0, | |
111 | .fd_flags = fd_flags, | |
112 | .heap_flags = heap_flags, | |
113 | }; | |
114 | int ret; | |
115 | ||
116 | if (!dmabuf_fd) | |
117 | return -EINVAL; | |
118 | ||
b3b43465 | 119 | ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data); |
a8779927 JS |
120 | if (ret < 0) |
121 | return ret; | |
122 | *dmabuf_fd = (int)data.fd; | |
123 | return ret; | |
124 | } | |
125 | ||
126 | static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags, | |
127 | int *dmabuf_fd) | |
128 | { | |
129 | return dmabuf_heap_alloc_fdflags(fd, len, O_RDWR | O_CLOEXEC, flags, | |
130 | dmabuf_fd); | |
131 | } | |
132 | ||
133 | static void dmabuf_sync(int fd, int start_stop) | |
134 | { | |
135 | struct dma_buf_sync sync = { | |
136 | .flags = start_stop | DMA_BUF_SYNC_RW, | |
137 | }; | |
138 | int ret; | |
139 | ||
140 | ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync); | |
141 | if (ret) | |
142 | printf("sync failed %d\n", errno); | |
143 | } | |
144 | ||
145 | #define ONE_MEG (1024 * 1024) | |
146 | ||
147 | static int test_alloc_and_import(char *heap_name) | |
148 | { | |
149 | int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1; | |
150 | uint32_t handle = 0; | |
151 | void *p = NULL; | |
152 | int ret; | |
153 | ||
154 | printf("Testing heap: %s\n", heap_name); | |
155 | ||
156 | heap_fd = dmabuf_heap_open(heap_name); | |
157 | if (heap_fd < 0) | |
158 | return -1; | |
159 | ||
160 | printf("Allocating 1 MEG\n"); | |
161 | ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd); | |
162 | if (ret) { | |
163 | printf("Allocation Failed!\n"); | |
164 | ret = -1; | |
165 | goto out; | |
166 | } | |
167 | /* mmap and write a simple pattern */ | |
168 | p = mmap(NULL, | |
169 | ONE_MEG, | |
170 | PROT_READ | PROT_WRITE, | |
171 | MAP_SHARED, | |
172 | dmabuf_fd, | |
173 | 0); | |
174 | if (p == MAP_FAILED) { | |
175 | printf("mmap() failed: %m\n"); | |
176 | ret = -1; | |
177 | goto out; | |
178 | } | |
179 | printf("mmap passed\n"); | |
180 | ||
181 | dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START); | |
182 | memset(p, 1, ONE_MEG / 2); | |
183 | memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2); | |
184 | dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END); | |
185 | ||
186 | importer_fd = open_vgem(); | |
187 | if (importer_fd < 0) { | |
188 | ret = importer_fd; | |
189 | printf("Failed to open vgem\n"); | |
190 | goto out; | |
191 | } | |
192 | ||
193 | ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle); | |
194 | if (ret < 0) { | |
195 | printf("Failed to import buffer\n"); | |
196 | goto out; | |
197 | } | |
198 | printf("import passed\n"); | |
199 | ||
200 | dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START); | |
201 | memset(p, 0xff, ONE_MEG); | |
202 | dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END); | |
203 | printf("syncs passed\n"); | |
204 | ||
205 | close_handle(importer_fd, handle); | |
206 | ret = 0; | |
207 | ||
208 | out: | |
209 | if (p) | |
210 | munmap(p, ONE_MEG); | |
211 | if (importer_fd >= 0) | |
212 | close(importer_fd); | |
213 | if (dmabuf_fd >= 0) | |
214 | close(dmabuf_fd); | |
215 | if (heap_fd >= 0) | |
216 | close(heap_fd); | |
217 | ||
218 | return ret; | |
219 | } | |
220 | ||
221 | /* Test the ioctl version compatibility w/ a smaller structure then expected */ | |
222 | static int dmabuf_heap_alloc_older(int fd, size_t len, unsigned int flags, | |
223 | int *dmabuf_fd) | |
224 | { | |
225 | int ret; | |
226 | unsigned int older_alloc_ioctl; | |
227 | struct dma_heap_allocation_data_smaller { | |
228 | __u64 len; | |
229 | __u32 fd; | |
230 | __u32 fd_flags; | |
231 | } data = { | |
232 | .len = len, | |
233 | .fd = 0, | |
234 | .fd_flags = O_RDWR | O_CLOEXEC, | |
235 | }; | |
236 | ||
237 | older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0, | |
238 | struct dma_heap_allocation_data_smaller); | |
239 | if (!dmabuf_fd) | |
240 | return -EINVAL; | |
241 | ||
242 | ret = ioctl(fd, older_alloc_ioctl, &data); | |
243 | if (ret < 0) | |
244 | return ret; | |
245 | *dmabuf_fd = (int)data.fd; | |
246 | return ret; | |
247 | } | |
248 | ||
249 | /* Test the ioctl version compatibility w/ a larger structure then expected */ | |
250 | static int dmabuf_heap_alloc_newer(int fd, size_t len, unsigned int flags, | |
251 | int *dmabuf_fd) | |
252 | { | |
253 | int ret; | |
254 | unsigned int newer_alloc_ioctl; | |
255 | struct dma_heap_allocation_data_bigger { | |
256 | __u64 len; | |
257 | __u32 fd; | |
258 | __u32 fd_flags; | |
259 | __u64 heap_flags; | |
260 | __u64 garbage1; | |
261 | __u64 garbage2; | |
262 | __u64 garbage3; | |
263 | } data = { | |
264 | .len = len, | |
265 | .fd = 0, | |
266 | .fd_flags = O_RDWR | O_CLOEXEC, | |
267 | .heap_flags = flags, | |
268 | .garbage1 = 0xffffffff, | |
269 | .garbage2 = 0x88888888, | |
270 | .garbage3 = 0x11111111, | |
271 | }; | |
272 | ||
273 | newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0, | |
274 | struct dma_heap_allocation_data_bigger); | |
275 | if (!dmabuf_fd) | |
276 | return -EINVAL; | |
277 | ||
278 | ret = ioctl(fd, newer_alloc_ioctl, &data); | |
279 | if (ret < 0) | |
280 | return ret; | |
281 | ||
282 | *dmabuf_fd = (int)data.fd; | |
283 | return ret; | |
284 | } | |
285 | ||
286 | static int test_alloc_compat(char *heap_name) | |
287 | { | |
288 | int heap_fd = -1, dmabuf_fd = -1; | |
289 | int ret; | |
290 | ||
291 | heap_fd = dmabuf_heap_open(heap_name); | |
292 | if (heap_fd < 0) | |
293 | return -1; | |
294 | ||
295 | printf("Testing (theoretical)older alloc compat\n"); | |
296 | ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd); | |
297 | if (ret) { | |
298 | printf("Older compat allocation failed!\n"); | |
299 | ret = -1; | |
300 | goto out; | |
301 | } | |
302 | close(dmabuf_fd); | |
303 | ||
304 | printf("Testing (theoretical)newer alloc compat\n"); | |
305 | ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd); | |
306 | if (ret) { | |
307 | printf("Newer compat allocation failed!\n"); | |
308 | ret = -1; | |
309 | goto out; | |
310 | } | |
311 | printf("Ioctl compatibility tests passed\n"); | |
312 | out: | |
313 | if (dmabuf_fd >= 0) | |
314 | close(dmabuf_fd); | |
315 | if (heap_fd >= 0) | |
316 | close(heap_fd); | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | static int test_alloc_errors(char *heap_name) | |
322 | { | |
323 | int heap_fd = -1, dmabuf_fd = -1; | |
324 | int ret; | |
325 | ||
326 | heap_fd = dmabuf_heap_open(heap_name); | |
327 | if (heap_fd < 0) | |
328 | return -1; | |
329 | ||
330 | printf("Testing expected error cases\n"); | |
331 | ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd); | |
332 | if (!ret) { | |
333 | printf("Did not see expected error (invalid fd)!\n"); | |
334 | ret = -1; | |
335 | goto out; | |
336 | } | |
337 | ||
338 | ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd); | |
339 | if (!ret) { | |
340 | printf("Did not see expected error (invalid heap flags)!\n"); | |
341 | ret = -1; | |
342 | goto out; | |
343 | } | |
344 | ||
345 | ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG, | |
346 | ~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd); | |
347 | if (!ret) { | |
348 | printf("Did not see expected error (invalid fd flags)!\n"); | |
349 | ret = -1; | |
350 | goto out; | |
351 | } | |
352 | ||
353 | printf("Expected error checking passed\n"); | |
4bb9d46d | 354 | ret = 0; |
a8779927 JS |
355 | out: |
356 | if (dmabuf_fd >= 0) | |
357 | close(dmabuf_fd); | |
358 | if (heap_fd >= 0) | |
359 | close(heap_fd); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | int main(void) | |
365 | { | |
366 | DIR *d; | |
367 | struct dirent *dir; | |
368 | int ret = -1; | |
369 | ||
370 | d = opendir(DEVPATH); | |
371 | if (!d) { | |
372 | printf("No %s directory?\n", DEVPATH); | |
373 | return -1; | |
374 | } | |
375 | ||
376 | while ((dir = readdir(d)) != NULL) { | |
377 | if (!strncmp(dir->d_name, ".", 2)) | |
378 | continue; | |
379 | if (!strncmp(dir->d_name, "..", 3)) | |
380 | continue; | |
381 | ||
382 | ret = test_alloc_and_import(dir->d_name); | |
383 | if (ret) | |
384 | break; | |
385 | ||
386 | ret = test_alloc_compat(dir->d_name); | |
387 | if (ret) | |
388 | break; | |
389 | ||
390 | ret = test_alloc_errors(dir->d_name); | |
391 | if (ret) | |
392 | break; | |
393 | } | |
394 | closedir(d); | |
395 | ||
396 | return ret; | |
397 | } |