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Diffstat (limited to 'tools/testing/selftests/drivers/dma-buf/udmabuf.c')
-rw-r--r--tools/testing/selftests/drivers/dma-buf/udmabuf.c214
1 files changed, 183 insertions, 31 deletions
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
index c812080e304e..6062723a172e 100644
--- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -9,52 +9,162 @@
#include <errno.h>
#include <fcntl.h>
#include <malloc.h>
+#include <stdbool.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
+#include <sys/mman.h>
#include <linux/memfd.h>
#include <linux/udmabuf.h>
+#include "../../kselftest.h"
#define TEST_PREFIX "drivers/dma-buf/udmabuf"
#define NUM_PAGES 4
+#define NUM_ENTRIES 4
+#define MEMFD_SIZE 1024 /* in pages */
-static int memfd_create(const char *name, unsigned int flags)
+static unsigned int page_size;
+
+static int create_memfd_with_seals(off64_t size, bool hpage)
+{
+ int memfd, ret;
+ unsigned int flags = MFD_ALLOW_SEALING;
+
+ if (hpage)
+ flags |= MFD_HUGETLB;
+
+ memfd = memfd_create("udmabuf-test", flags);
+ if (memfd < 0) {
+ ksft_print_msg("%s: [skip,no-memfd]\n", TEST_PREFIX);
+ exit(KSFT_SKIP);
+ }
+
+ ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
+ if (ret < 0) {
+ ksft_print_msg("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
+ exit(KSFT_SKIP);
+ }
+
+ ret = ftruncate(memfd, size);
+ if (ret == -1) {
+ ksft_print_msg("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
+ exit(KSFT_FAIL);
+ }
+
+ return memfd;
+}
+
+static int create_udmabuf_list(int devfd, int memfd, off64_t memfd_size)
+{
+ struct udmabuf_create_list *list;
+ int ubuf_fd, i;
+
+ list = malloc(sizeof(struct udmabuf_create_list) +
+ sizeof(struct udmabuf_create_item) * NUM_ENTRIES);
+ if (!list) {
+ ksft_print_msg("%s: [FAIL, udmabuf-malloc]\n", TEST_PREFIX);
+ exit(KSFT_FAIL);
+ }
+
+ for (i = 0; i < NUM_ENTRIES; i++) {
+ list->list[i].memfd = memfd;
+ list->list[i].offset = i * (memfd_size / NUM_ENTRIES);
+ list->list[i].size = getpagesize() * NUM_PAGES;
+ }
+
+ list->count = NUM_ENTRIES;
+ list->flags = UDMABUF_FLAGS_CLOEXEC;
+ ubuf_fd = ioctl(devfd, UDMABUF_CREATE_LIST, list);
+ free(list);
+ if (ubuf_fd < 0) {
+ ksft_print_msg("%s: [FAIL, udmabuf-create]\n", TEST_PREFIX);
+ exit(KSFT_FAIL);
+ }
+
+ return ubuf_fd;
+}
+
+static void write_to_memfd(void *addr, off64_t size, char chr)
+{
+ int i;
+
+ for (i = 0; i < size / page_size; i++) {
+ *((char *)addr + (i * page_size)) = chr;
+ }
+}
+
+static void *mmap_fd(int fd, off64_t size)
+{
+ void *addr;
+
+ addr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (addr == MAP_FAILED) {
+ ksft_print_msg("%s: ubuf_fd mmap fail\n", TEST_PREFIX);
+ exit(KSFT_FAIL);
+ }
+
+ return addr;
+}
+
+static int compare_chunks(void *addr1, void *addr2, off64_t memfd_size)
{
- return syscall(__NR_memfd_create, name, flags);
+ off64_t off;
+ int i = 0, j, k = 0, ret = 0;
+ char char1, char2;
+
+ while (i < NUM_ENTRIES) {
+ off = i * (memfd_size / NUM_ENTRIES);
+ for (j = 0; j < NUM_PAGES; j++, k++) {
+ char1 = *((char *)addr1 + off + (j * getpagesize()));
+ char2 = *((char *)addr2 + (k * getpagesize()));
+ if (char1 != char2) {
+ ret = -1;
+ goto err;
+ }
+ }
+ i++;
+ }
+err:
+ munmap(addr1, memfd_size);
+ munmap(addr2, NUM_ENTRIES * NUM_PAGES * getpagesize());
+ return ret;
}
int main(int argc, char *argv[])
{
struct udmabuf_create create;
int devfd, memfd, buf, ret;
- off_t size;
- void *mem;
+ off64_t size;
+ void *addr1, *addr2;
+
+ ksft_print_header();
+ ksft_set_plan(6);
devfd = open("/dev/udmabuf", O_RDWR);
if (devfd < 0) {
- printf("%s: [skip,no-udmabuf: Unable to access DMA buffer device file]\n",
- TEST_PREFIX);
- exit(77);
+ ksft_print_msg(
+ "%s: [skip,no-udmabuf: Unable to access DMA buffer device file]\n",
+ TEST_PREFIX);
+ exit(KSFT_SKIP);
}
memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING);
if (memfd < 0) {
- printf("%s: [skip,no-memfd]\n", TEST_PREFIX);
- exit(77);
+ ksft_print_msg("%s: [skip,no-memfd]\n", TEST_PREFIX);
+ exit(KSFT_SKIP);
}
ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
if (ret < 0) {
- printf("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
- exit(77);
+ ksft_print_msg("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
+ exit(KSFT_SKIP);
}
-
size = getpagesize() * NUM_PAGES;
ret = ftruncate(memfd, size);
if (ret == -1) {
- printf("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
- exit(1);
+ ksft_print_msg("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
+ exit(KSFT_FAIL);
}
memset(&create, 0, sizeof(create));
@@ -64,44 +174,86 @@ int main(int argc, char *argv[])
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);
- }
+ if (buf >= 0)
+ ksft_test_result_fail("%s: [FAIL,test-1]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-1]\n", TEST_PREFIX);
/* 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);
- }
+ if (buf >= 0)
+ ksft_test_result_fail("%s: [FAIL,test-2]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-2]\n", TEST_PREFIX);
/* 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);
- }
+ if (buf >= 0)
+ ksft_test_result_fail("%s: [FAIL,test-3]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-3]\n", TEST_PREFIX);
/* should work */
+ page_size = getpagesize();
+ addr1 = mmap_fd(memfd, size);
+ write_to_memfd(addr1, size, 'a');
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);
- }
+ if (buf < 0)
+ ksft_test_result_fail("%s: [FAIL,test-4]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-4]\n", TEST_PREFIX);
+
+ munmap(addr1, size);
+ close(buf);
+ close(memfd);
+
+ /* should work (migration of 4k size pages)*/
+ size = MEMFD_SIZE * page_size;
+ memfd = create_memfd_with_seals(size, false);
+ addr1 = mmap_fd(memfd, size);
+ write_to_memfd(addr1, size, 'a');
+ buf = create_udmabuf_list(devfd, memfd, size);
+ addr2 = mmap_fd(buf, NUM_PAGES * NUM_ENTRIES * getpagesize());
+ write_to_memfd(addr1, size, 'b');
+ ret = compare_chunks(addr1, addr2, size);
+ if (ret < 0)
+ ksft_test_result_fail("%s: [FAIL,test-5]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-5]\n", TEST_PREFIX);
+
+ close(buf);
+ close(memfd);
+
+ /* should work (migration of 2MB size huge pages)*/
+ page_size = getpagesize() * 512; /* 2 MB */
+ size = MEMFD_SIZE * page_size;
+ memfd = create_memfd_with_seals(size, true);
+ addr1 = mmap_fd(memfd, size);
+ write_to_memfd(addr1, size, 'a');
+ buf = create_udmabuf_list(devfd, memfd, size);
+ addr2 = mmap_fd(buf, NUM_PAGES * NUM_ENTRIES * getpagesize());
+ write_to_memfd(addr1, size, 'b');
+ ret = compare_chunks(addr1, addr2, size);
+ if (ret < 0)
+ ksft_test_result_fail("%s: [FAIL,test-6]\n", TEST_PREFIX);
+ else
+ ksft_test_result_pass("%s: [PASS,test-6]\n", TEST_PREFIX);
- fprintf(stderr, "%s: ok\n", TEST_PREFIX);
close(buf);
close(memfd);
close(devfd);
+
+ ksft_print_msg("%s: ok\n", TEST_PREFIX);
+ ksft_print_cnts();
+
return 0;
}
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