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-rw-r--r--tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
new file mode 100644
index 000000000..890a8236a
--- /dev/null
+++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
@@ -0,0 +1,485 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <linux/dma-buf.h>
+#include <linux/dma-heap.h>
+#include <drm/drm.h>
+
+#define DEVPATH "/dev/dma_heap"
+
+static int check_vgem(int fd)
+{
+ drm_version_t version = { 0 };
+ char name[5];
+ int ret;
+
+ version.name_len = 4;
+ version.name = name;
+
+ ret = ioctl(fd, DRM_IOCTL_VERSION, &version);
+ if (ret)
+ return 0;
+
+ return !strcmp(name, "vgem");
+}
+
+static int open_vgem(void)
+{
+ int i, fd;
+ const char *drmstr = "/dev/dri/card";
+
+ fd = -1;
+ for (i = 0; i < 16; i++) {
+ char name[80];
+
+ snprintf(name, 80, "%s%u", drmstr, i);
+
+ fd = open(name, O_RDWR);
+ if (fd < 0)
+ continue;
+
+ if (!check_vgem(fd)) {
+ close(fd);
+ fd = -1;
+ continue;
+ } else {
+ break;
+ }
+ }
+ return fd;
+}
+
+static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle)
+{
+ struct drm_prime_handle import_handle = {
+ .fd = dma_buf_fd,
+ .flags = 0,
+ .handle = 0,
+ };
+ int ret;
+
+ ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle);
+ if (ret == 0)
+ *handle = import_handle.handle;
+ return ret;
+}
+
+static void close_handle(int vgem_fd, uint32_t handle)
+{
+ struct drm_gem_close close = {
+ .handle = handle,
+ };
+
+ ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close);
+}
+
+static int dmabuf_heap_open(char *name)
+{
+ int ret, fd;
+ char buf[256];
+
+ ret = snprintf(buf, 256, "%s/%s", DEVPATH, name);
+ if (ret < 0) {
+ printf("snprintf failed!\n");
+ return ret;
+ }
+
+ fd = open(buf, O_RDWR);
+ if (fd < 0)
+ printf("open %s failed!\n", buf);
+ return fd;
+}
+
+static int dmabuf_heap_alloc_fdflags(int fd, size_t len, unsigned int fd_flags,
+ unsigned int heap_flags, int *dmabuf_fd)
+{
+ struct dma_heap_allocation_data data = {
+ .len = len,
+ .fd = 0,
+ .fd_flags = fd_flags,
+ .heap_flags = heap_flags,
+ };
+ int ret;
+
+ if (!dmabuf_fd)
+ return -EINVAL;
+
+ ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
+ if (ret < 0)
+ return ret;
+ *dmabuf_fd = (int)data.fd;
+ return ret;
+}
+
+static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags,
+ int *dmabuf_fd)
+{
+ return dmabuf_heap_alloc_fdflags(fd, len, O_RDWR | O_CLOEXEC, flags,
+ dmabuf_fd);
+}
+
+static int dmabuf_sync(int fd, int start_stop)
+{
+ struct dma_buf_sync sync = {
+ .flags = start_stop | DMA_BUF_SYNC_RW,
+ };
+
+ return ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
+}
+
+#define ONE_MEG (1024 * 1024)
+
+static int test_alloc_and_import(char *heap_name)
+{
+ int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1;
+ uint32_t handle = 0;
+ void *p = NULL;
+ int ret;
+
+ heap_fd = dmabuf_heap_open(heap_name);
+ if (heap_fd < 0)
+ return -1;
+
+ printf(" Testing allocation and importing: ");
+ ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+ if (ret) {
+ printf("FAIL (Allocation Failed!)\n");
+ ret = -1;
+ goto out;
+ }
+ /* mmap and write a simple pattern */
+ p = mmap(NULL,
+ ONE_MEG,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ dmabuf_fd,
+ 0);
+ if (p == MAP_FAILED) {
+ printf("FAIL (mmap() failed)\n");
+ ret = -1;
+ goto out;
+ }
+
+ dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
+ memset(p, 1, ONE_MEG / 2);
+ memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2);
+ dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
+
+ importer_fd = open_vgem();
+ if (importer_fd < 0) {
+ ret = importer_fd;
+ printf("(Could not open vgem - skipping): ");
+ } else {
+ ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
+ if (ret < 0) {
+ printf("FAIL (Failed to import buffer)\n");
+ goto out;
+ }
+ }
+
+ ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
+ if (ret < 0) {
+ printf("FAIL (DMA_BUF_SYNC_START failed!)\n");
+ goto out;
+ }
+
+ memset(p, 0xff, ONE_MEG);
+ ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
+ if (ret < 0) {
+ printf("FAIL (DMA_BUF_SYNC_END failed!)\n");
+ goto out;
+ }
+
+ close_handle(importer_fd, handle);
+ ret = 0;
+ printf(" OK\n");
+out:
+ if (p)
+ munmap(p, ONE_MEG);
+ if (importer_fd >= 0)
+ close(importer_fd);
+ if (dmabuf_fd >= 0)
+ close(dmabuf_fd);
+ if (heap_fd >= 0)
+ close(heap_fd);
+
+ return ret;
+}
+
+static int test_alloc_zeroed(char *heap_name, size_t size)
+{
+ int heap_fd = -1, dmabuf_fd[32];
+ int i, j, ret;
+ void *p = NULL;
+ char *c;
+
+ printf(" Testing alloced %ldk buffers are zeroed: ", size / 1024);
+ heap_fd = dmabuf_heap_open(heap_name);
+ if (heap_fd < 0)
+ return -1;
+
+ /* Allocate and fill a bunch of buffers */
+ for (i = 0; i < 32; i++) {
+ ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
+ if (ret < 0) {
+ printf("FAIL (Allocation (%i) failed)\n", i);
+ goto out;
+ }
+ /* mmap and fill with simple pattern */
+ p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
+ if (p == MAP_FAILED) {
+ printf("FAIL (mmap() failed!)\n");
+ ret = -1;
+ goto out;
+ }
+ dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
+ memset(p, 0xff, size);
+ dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
+ munmap(p, size);
+ }
+ /* close them all */
+ for (i = 0; i < 32; i++)
+ close(dmabuf_fd[i]);
+
+ /* Allocate and validate all buffers are zeroed */
+ for (i = 0; i < 32; i++) {
+ ret = dmabuf_heap_alloc(heap_fd, size, 0, &dmabuf_fd[i]);
+ if (ret < 0) {
+ printf("FAIL (Allocation (%i) failed)\n", i);
+ goto out;
+ }
+
+ /* mmap and validate everything is zero */
+ p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
+ if (p == MAP_FAILED) {
+ printf("FAIL (mmap() failed!)\n");
+ ret = -1;
+ goto out;
+ }
+ dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
+ c = (char *)p;
+ for (j = 0; j < size; j++) {
+ if (c[j] != 0) {
+ printf("FAIL (Allocated buffer not zeroed @ %i)\n", j);
+ break;
+ }
+ }
+ dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
+ munmap(p, size);
+ }
+ /* close them all */
+ for (i = 0; i < 32; i++)
+ close(dmabuf_fd[i]);
+
+ close(heap_fd);
+ printf("OK\n");
+ return 0;
+
+out:
+ while (i > 0) {
+ close(dmabuf_fd[i]);
+ i--;
+ }
+ close(heap_fd);
+ return ret;
+}
+
+/* Test the ioctl version compatibility w/ a smaller structure then expected */
+static int dmabuf_heap_alloc_older(int fd, size_t len, unsigned int flags,
+ int *dmabuf_fd)
+{
+ int ret;
+ unsigned int older_alloc_ioctl;
+ struct dma_heap_allocation_data_smaller {
+ __u64 len;
+ __u32 fd;
+ __u32 fd_flags;
+ } data = {
+ .len = len,
+ .fd = 0,
+ .fd_flags = O_RDWR | O_CLOEXEC,
+ };
+
+ older_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
+ struct dma_heap_allocation_data_smaller);
+ if (!dmabuf_fd)
+ return -EINVAL;
+
+ ret = ioctl(fd, older_alloc_ioctl, &data);
+ if (ret < 0)
+ return ret;
+ *dmabuf_fd = (int)data.fd;
+ return ret;
+}
+
+/* Test the ioctl version compatibility w/ a larger structure then expected */
+static int dmabuf_heap_alloc_newer(int fd, size_t len, unsigned int flags,
+ int *dmabuf_fd)
+{
+ int ret;
+ unsigned int newer_alloc_ioctl;
+ struct dma_heap_allocation_data_bigger {
+ __u64 len;
+ __u32 fd;
+ __u32 fd_flags;
+ __u64 heap_flags;
+ __u64 garbage1;
+ __u64 garbage2;
+ __u64 garbage3;
+ } data = {
+ .len = len,
+ .fd = 0,
+ .fd_flags = O_RDWR | O_CLOEXEC,
+ .heap_flags = flags,
+ .garbage1 = 0xffffffff,
+ .garbage2 = 0x88888888,
+ .garbage3 = 0x11111111,
+ };
+
+ newer_alloc_ioctl = _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,
+ struct dma_heap_allocation_data_bigger);
+ if (!dmabuf_fd)
+ return -EINVAL;
+
+ ret = ioctl(fd, newer_alloc_ioctl, &data);
+ if (ret < 0)
+ return ret;
+
+ *dmabuf_fd = (int)data.fd;
+ return ret;
+}
+
+static int test_alloc_compat(char *heap_name)
+{
+ int heap_fd = -1, dmabuf_fd = -1;
+ int ret;
+
+ heap_fd = dmabuf_heap_open(heap_name);
+ if (heap_fd < 0)
+ return -1;
+
+ printf(" Testing (theoretical)older alloc compat: ");
+ ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+ if (ret) {
+ printf("FAIL (Older compat allocation failed!)\n");
+ ret = -1;
+ goto out;
+ }
+ close(dmabuf_fd);
+ printf("OK\n");
+
+ printf(" Testing (theoretical)newer alloc compat: ");
+ ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+ if (ret) {
+ printf("FAIL (Newer compat allocation failed!)\n");
+ ret = -1;
+ goto out;
+ }
+ printf("OK\n");
+out:
+ if (dmabuf_fd >= 0)
+ close(dmabuf_fd);
+ if (heap_fd >= 0)
+ close(heap_fd);
+
+ return ret;
+}
+
+static int test_alloc_errors(char *heap_name)
+{
+ int heap_fd = -1, dmabuf_fd = -1;
+ int ret;
+
+ heap_fd = dmabuf_heap_open(heap_name);
+ if (heap_fd < 0)
+ return -1;
+
+ printf(" Testing expected error cases: ");
+ ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
+ if (!ret) {
+ printf("FAIL (Did not see expected error (invalid fd)!)\n");
+ ret = -1;
+ goto out;
+ }
+
+ ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
+ if (!ret) {
+ printf("FAIL (Did not see expected error (invalid heap flags)!)\n");
+ ret = -1;
+ goto out;
+ }
+
+ ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
+ ~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
+ if (!ret) {
+ printf("FAIL (Did not see expected error (invalid fd flags)!)\n");
+ ret = -1;
+ goto out;
+ }
+
+ printf("OK\n");
+ ret = 0;
+out:
+ if (dmabuf_fd >= 0)
+ close(dmabuf_fd);
+ if (heap_fd >= 0)
+ close(heap_fd);
+
+ return ret;
+}
+
+int main(void)
+{
+ DIR *d;
+ struct dirent *dir;
+ int ret = -1;
+
+ d = opendir(DEVPATH);
+ if (!d) {
+ printf("No %s directory?\n", DEVPATH);
+ return -1;
+ }
+
+ while ((dir = readdir(d)) != NULL) {
+ if (!strncmp(dir->d_name, ".", 2))
+ continue;
+ if (!strncmp(dir->d_name, "..", 3))
+ continue;
+
+ printf("Testing heap: %s\n", dir->d_name);
+ printf("=======================================\n");
+ ret = test_alloc_and_import(dir->d_name);
+ if (ret)
+ break;
+
+ ret = test_alloc_zeroed(dir->d_name, 4 * 1024);
+ if (ret)
+ break;
+
+ ret = test_alloc_zeroed(dir->d_name, ONE_MEG);
+ if (ret)
+ break;
+
+ ret = test_alloc_compat(dir->d_name);
+ if (ret)
+ break;
+
+ ret = test_alloc_errors(dir->d_name);
+ if (ret)
+ break;
+ }
+ closedir(d);
+
+ return ret;
+}