1 // SPDX-License-Identifier: GPL-2.0
11 #include <sys/ioctl.h>
13 #include <sys/types.h>
15 #include <linux/dma-buf.h>
18 #include "../../../../include/uapi/linux/dma-heap.h"
20 #define DEVPATH "/dev/dma_heap"
22 static int check_vgem(int fd)
24 drm_version_t version = { 0 };
31 ret = ioctl(fd, DRM_IOCTL_VERSION, &version);
35 return !strcmp(name, "vgem");
38 static int open_vgem(void)
41 const char *drmstr = "/dev/dri/card";
44 for (i = 0; i < 16; i++) {
47 snprintf(name, 80, "%s%u", drmstr, i);
49 fd = open(name, O_RDWR);
53 if (!check_vgem(fd)) {
64 static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle)
66 struct drm_prime_handle import_handle = {
73 ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle);
75 *handle = import_handle.handle;
79 static void close_handle(int vgem_fd, uint32_t handle)
81 struct drm_gem_close close = {
85 ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close);
88 static int dmabuf_heap_open(char *name)
93 ret = snprintf(buf, 256, "%s/%s", DEVPATH, name);
95 printf("snprintf failed!\n");
99 fd = open(buf, O_RDWR);
101 printf("open %s failed!\n", buf);
105 static int dmabuf_heap_alloc_fdflags(int fd, size_t len, unsigned int fd_flags,
106 unsigned int heap_flags, int *dmabuf_fd)
108 struct dma_heap_allocation_data data = {
111 .fd_flags = fd_flags,
112 .heap_flags = heap_flags,
119 ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
122 *dmabuf_fd = (int)data.fd;
126 static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags,
129 return dmabuf_heap_alloc_fdflags(fd, len, O_RDWR | O_CLOEXEC, flags,
133 static void dmabuf_sync(int fd, int start_stop)
135 struct dma_buf_sync sync = {
136 .flags = start_stop | DMA_BUF_SYNC_RW,
140 ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
142 printf("sync failed %d\n", errno);
145 #define ONE_MEG (1024 * 1024)
147 static int test_alloc_and_import(char *heap_name)
149 int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
154 printf("Testing heap: %s\n", heap_name);
156 heap_fd = dmabuf_heap_open(heap_name);
160 printf("Allocating 1 MEG\n");
161 ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
163 printf("Allocation Failed!\n");
167 /* mmap and write a simple pattern */
170 PROT_READ | PROT_WRITE,
174 if (p == MAP_FAILED) {
175 printf("mmap() failed: %m\n");
179 printf("mmap passed\n");
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);
186 importer_fd = open_vgem();
187 if (importer_fd < 0) {
189 printf("Failed to open vgem\n");
193 ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
195 printf("Failed to import buffer\n");
198 printf("import passed\n");
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");
205 close_handle(importer_fd, handle);
211 if (importer_fd >= 0)
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,
226 unsigned int older_alloc_ioctl;
227 struct dma_heap_allocation_data_smaller {
234 .fd_flags = O_RDWR | O_CLOEXEC,
237 older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
238 struct dma_heap_allocation_data_smaller);
242 ret = ioctl(fd, older_alloc_ioctl, &data);
245 *dmabuf_fd = (int)data.fd;
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,
254 unsigned int newer_alloc_ioctl;
255 struct dma_heap_allocation_data_bigger {
266 .fd_flags = O_RDWR | O_CLOEXEC,
268 .garbage1 = 0xffffffff,
269 .garbage2 = 0x88888888,
270 .garbage3 = 0x11111111,
273 newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
274 struct dma_heap_allocation_data_bigger);
278 ret = ioctl(fd, newer_alloc_ioctl, &data);
282 *dmabuf_fd = (int)data.fd;
286 static int test_alloc_compat(char *heap_name)
288 int heap_fd = -1, dmabuf_fd = -1;
291 heap_fd = dmabuf_heap_open(heap_name);
295 printf("Testing (theoretical)older alloc compat\n");
296 ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
298 printf("Older compat allocation failed!\n");
304 printf("Testing (theoretical)newer alloc compat\n");
305 ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
307 printf("Newer compat allocation failed!\n");
311 printf("Ioctl compatibility tests passed\n");
321 static int test_alloc_errors(char *heap_name)
323 int heap_fd = -1, dmabuf_fd = -1;
326 heap_fd = dmabuf_heap_open(heap_name);
330 printf("Testing expected error cases\n");
331 ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
333 printf("Did not see expected error (invalid fd)!\n");
338 ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
340 printf("Did not see expected error (invalid heap flags)!\n");
345 ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
346 ~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
348 printf("Did not see expected error (invalid fd flags)!\n");
353 printf("Expected error checking passed\n");
370 d = opendir(DEVPATH);
372 printf("No %s directory?\n", DEVPATH);
376 while ((dir = readdir(d)) != NULL) {
377 if (!strncmp(dir->d_name, ".", 2))
379 if (!strncmp(dir->d_name, "..", 3))
382 ret = test_alloc_and_import(dir->d_name);
386 ret = test_alloc_compat(dir->d_name);
390 ret = test_alloc_errors(dir->d_name);