Merge tag 'pinctrl-v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6-microblaze.git] / tools / testing / selftests / dmabuf-heaps / dmabuf-heap.c
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
119         ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
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 int dmabuf_sync(int fd, int start_stop)
134 {
135         struct dma_buf_sync sync = {
136                 .flags = start_stop | DMA_BUF_SYNC_RW,
137         };
138
139         return ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
140 }
141
142 #define ONE_MEG (1024 * 1024)
143
144 static int test_alloc_and_import(char *heap_name)
145 {
146         int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
147         uint32_t handle = 0;
148         void *p = NULL;
149         int ret;
150
151         heap_fd = dmabuf_heap_open(heap_name);
152         if (heap_fd < 0)
153                 return -1;
154
155         printf("  Testing allocation and importing:  ");
156         ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
157         if (ret) {
158                 printf("FAIL (Allocation Failed!)\n");
159                 ret = -1;
160                 goto out;
161         }
162         /* mmap and write a simple pattern */
163         p = mmap(NULL,
164                  ONE_MEG,
165                  PROT_READ | PROT_WRITE,
166                  MAP_SHARED,
167                  dmabuf_fd,
168                  0);
169         if (p == MAP_FAILED) {
170                 printf("FAIL (mmap() failed)\n");
171                 ret = -1;
172                 goto out;
173         }
174
175         dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
176         memset(p, 1, ONE_MEG / 2);
177         memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2);
178         dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
179
180         importer_fd = open_vgem();
181         if (importer_fd < 0) {
182                 ret = importer_fd;
183                 printf("(Could not open vgem - skipping):  ");
184         } else {
185                 ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
186                 if (ret < 0) {
187                         printf("FAIL (Failed to import buffer)\n");
188                         goto out;
189                 }
190         }
191
192         ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
193         if (ret < 0) {
194                 printf("FAIL (DMA_BUF_SYNC_START failed!)\n");
195                 goto out;
196         }
197
198         memset(p, 0xff, ONE_MEG);
199         ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
200         if (ret < 0) {
201                 printf("FAIL (DMA_BUF_SYNC_END failed!)\n");
202                 goto out;
203         }
204
205         close_handle(importer_fd, handle);
206         ret = 0;
207         printf(" OK\n");
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 static int test_alloc_zeroed(char *heap_name, size_t size)
222 {
223         int heap_fd = -1, dmabuf_fd[32];
224         int i, j, ret;
225         void *p = NULL;
226         char *c;
227
228         printf("  Testing alloced %ldk buffers are zeroed:  ", size / 1024);
229         heap_fd = dmabuf_heap_open(heap_name);
230         if (heap_fd < 0)
231                 return -1;
232
233         /* Allocate and fill a bunch of buffers */
234         for (i = 0; i < 32; i++) {
235                 ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
236                 if (ret < 0) {
237                         printf("FAIL (Allocation (%i) failed)\n", i);
238                         goto out;
239                 }
240                 /* mmap and fill with simple pattern */
241                 p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
242                 if (p == MAP_FAILED) {
243                         printf("FAIL (mmap() failed!)\n");
244                         ret = -1;
245                         goto out;
246                 }
247                 dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
248                 memset(p, 0xff, size);
249                 dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
250                 munmap(p, size);
251         }
252         /* close them all */
253         for (i = 0; i < 32; i++)
254                 close(dmabuf_fd[i]);
255
256         /* Allocate and validate all buffers are zeroed */
257         for (i = 0; i < 32; i++) {
258                 ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
259                 if (ret < 0) {
260                         printf("FAIL (Allocation (%i) failed)\n", i);
261                         goto out;
262                 }
263
264                 /* mmap and validate everything is zero */
265                 p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
266                 if (p == MAP_FAILED) {
267                         printf("FAIL (mmap() failed!)\n");
268                         ret = -1;
269                         goto out;
270                 }
271                 dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
272                 c = (char *)p;
273                 for (j = 0; j < size; j++) {
274                         if (c[j] != 0) {
275                                 printf("FAIL (Allocated buffer not zeroed @ %i)\n", j);
276                                 break;
277                         }
278                 }
279                 dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
280                 munmap(p, size);
281         }
282         /* close them all */
283         for (i = 0; i < 32; i++)
284                 close(dmabuf_fd[i]);
285
286         close(heap_fd);
287         printf("OK\n");
288         return 0;
289
290 out:
291         while (i > 0) {
292                 close(dmabuf_fd[i]);
293                 i--;
294         }
295         close(heap_fd);
296         return ret;
297 }
298
299 /* Test the ioctl version compatibility w/ a smaller structure then expected */
300 static int dmabuf_heap_alloc_older(int fd, size_t len, unsigned int flags,
301                                    int *dmabuf_fd)
302 {
303         int ret;
304         unsigned int older_alloc_ioctl;
305         struct dma_heap_allocation_data_smaller {
306                 __u64 len;
307                 __u32 fd;
308                 __u32 fd_flags;
309         } data = {
310                 .len = len,
311                 .fd = 0,
312                 .fd_flags = O_RDWR | O_CLOEXEC,
313         };
314
315         older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
316                                   struct dma_heap_allocation_data_smaller);
317         if (!dmabuf_fd)
318                 return -EINVAL;
319
320         ret = ioctl(fd, older_alloc_ioctl, &data);
321         if (ret < 0)
322                 return ret;
323         *dmabuf_fd = (int)data.fd;
324         return ret;
325 }
326
327 /* Test the ioctl version compatibility w/ a larger structure then expected */
328 static int dmabuf_heap_alloc_newer(int fd, size_t len, unsigned int flags,
329                                    int *dmabuf_fd)
330 {
331         int ret;
332         unsigned int newer_alloc_ioctl;
333         struct dma_heap_allocation_data_bigger {
334                 __u64 len;
335                 __u32 fd;
336                 __u32 fd_flags;
337                 __u64 heap_flags;
338                 __u64 garbage1;
339                 __u64 garbage2;
340                 __u64 garbage3;
341         } data = {
342                 .len = len,
343                 .fd = 0,
344                 .fd_flags = O_RDWR | O_CLOEXEC,
345                 .heap_flags = flags,
346                 .garbage1 = 0xffffffff,
347                 .garbage2 = 0x88888888,
348                 .garbage3 = 0x11111111,
349         };
350
351         newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
352                                   struct dma_heap_allocation_data_bigger);
353         if (!dmabuf_fd)
354                 return -EINVAL;
355
356         ret = ioctl(fd, newer_alloc_ioctl, &data);
357         if (ret < 0)
358                 return ret;
359
360         *dmabuf_fd = (int)data.fd;
361         return ret;
362 }
363
364 static int test_alloc_compat(char *heap_name)
365 {
366         int heap_fd = -1, dmabuf_fd = -1;
367         int ret;
368
369         heap_fd = dmabuf_heap_open(heap_name);
370         if (heap_fd < 0)
371                 return -1;
372
373         printf("  Testing (theoretical)older alloc compat:  ");
374         ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
375         if (ret) {
376                 printf("FAIL (Older compat allocation failed!)\n");
377                 ret = -1;
378                 goto out;
379         }
380         close(dmabuf_fd);
381         printf("OK\n");
382
383         printf("  Testing (theoretical)newer alloc compat:  ");
384         ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
385         if (ret) {
386                 printf("FAIL (Newer compat allocation failed!)\n");
387                 ret = -1;
388                 goto out;
389         }
390         printf("OK\n");
391 out:
392         if (dmabuf_fd >= 0)
393                 close(dmabuf_fd);
394         if (heap_fd >= 0)
395                 close(heap_fd);
396
397         return ret;
398 }
399
400 static int test_alloc_errors(char *heap_name)
401 {
402         int heap_fd = -1, dmabuf_fd = -1;
403         int ret;
404
405         heap_fd = dmabuf_heap_open(heap_name);
406         if (heap_fd < 0)
407                 return -1;
408
409         printf("  Testing expected error cases:  ");
410         ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
411         if (!ret) {
412                 printf("FAIL (Did not see expected error (invalid fd)!)\n");
413                 ret = -1;
414                 goto out;
415         }
416
417         ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
418         if (!ret) {
419                 printf("FAIL (Did not see expected error (invalid heap flags)!)\n");
420                 ret = -1;
421                 goto out;
422         }
423
424         ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
425                                         ~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
426         if (!ret) {
427                 printf("FAIL (Did not see expected error (invalid fd flags)!)\n");
428                 ret = -1;
429                 goto out;
430         }
431
432         printf("OK\n");
433         ret = 0;
434 out:
435         if (dmabuf_fd >= 0)
436                 close(dmabuf_fd);
437         if (heap_fd >= 0)
438                 close(heap_fd);
439
440         return ret;
441 }
442
443 int main(void)
444 {
445         DIR *d;
446         struct dirent *dir;
447         int ret = -1;
448
449         d = opendir(DEVPATH);
450         if (!d) {
451                 printf("No %s directory?\n", DEVPATH);
452                 return -1;
453         }
454
455         while ((dir = readdir(d)) != NULL) {
456                 if (!strncmp(dir->d_name, ".", 2))
457                         continue;
458                 if (!strncmp(dir->d_name, "..", 3))
459                         continue;
460
461                 printf("Testing heap: %s\n", dir->d_name);
462                 printf("=======================================\n");
463                 ret = test_alloc_and_import(dir->d_name);
464                 if (ret)
465                         break;
466
467                 ret = test_alloc_zeroed(dir->d_name, 4 * 1024);
468                 if (ret)
469                         break;
470
471                 ret = test_alloc_zeroed(dir->d_name, ONE_MEG);
472                 if (ret)
473                         break;
474
475                 ret = test_alloc_compat(dir->d_name);
476                 if (ret)
477                         break;
478
479                 ret = test_alloc_errors(dir->d_name);
480                 if (ret)
481                         break;
482         }
483         closedir(d);
484
485         return ret;
486 }