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-rw-r--r--tools/testing/selftests/drivers/dma-buf/udmabuf.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
new file mode 100644
index 000000000..4de902ea1
--- /dev/null
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/fcntl.h>
+#include <malloc.h>
+
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+#include <linux/memfd.h>
+#include <linux/udmabuf.h>
+
+#define TEST_PREFIX "drivers/dma-buf/udmabuf"
+#define NUM_PAGES 4
+
+static int memfd_create(const char *name, unsigned int flags)
+{
+ return syscall(__NR_memfd_create, name, flags);
+}
+
+int main(int argc, char *argv[])
+{
+ struct udmabuf_create create;
+ int devfd, memfd, buf, ret;
+ off_t size;
+ void *mem;
+
+ devfd = open("/dev/udmabuf", O_RDWR);
+ if (devfd < 0) {
+ printf("%s: [skip,no-udmabuf]\n", TEST_PREFIX);
+ exit(77);
+ }
+
+ memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING);
+ if (memfd < 0) {
+ printf("%s: [skip,no-memfd]\n", TEST_PREFIX);
+ exit(77);
+ }
+
+ ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
+ if (ret < 0) {
+ printf("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
+ exit(77);
+ }
+
+
+ size = getpagesize() * NUM_PAGES;
+ ret = ftruncate(memfd, size);
+ if (ret == -1) {
+ printf("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ memset(&create, 0, sizeof(create));
+
+ /* should fail (offset not page aligned) */
+ create.memfd = memfd;
+ create.offset = getpagesize()/2;
+ create.size = getpagesize();
+ buf = ioctl(devfd, UDMABUF_CREATE, &create);
+ if (buf >= 0) {
+ printf("%s: [FAIL,test-1]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ /* should fail (size not multiple of page) */
+ create.memfd = memfd;
+ create.offset = 0;
+ create.size = getpagesize()/2;
+ buf = ioctl(devfd, UDMABUF_CREATE, &create);
+ if (buf >= 0) {
+ printf("%s: [FAIL,test-2]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ /* should fail (not memfd) */
+ create.memfd = 0; /* stdin */
+ create.offset = 0;
+ create.size = size;
+ buf = ioctl(devfd, UDMABUF_CREATE, &create);
+ if (buf >= 0) {
+ printf("%s: [FAIL,test-3]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ /* should work */
+ create.memfd = memfd;
+ create.offset = 0;
+ create.size = size;
+ buf = ioctl(devfd, UDMABUF_CREATE, &create);
+ if (buf < 0) {
+ printf("%s: [FAIL,test-4]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ fprintf(stderr, "%s: ok\n", TEST_PREFIX);
+ close(buf);
+ close(memfd);
+ close(devfd);
+ return 0;
+}