1 files changed, 442 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 000000000000..fc9694fc4e89
--- /dev/null
+++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
@@ -0,0 +1,442 @@
+// 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>
+#include "kselftest.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 || version.name_len != 4)
+		return 0;
+
+	name[4] = '\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)
+		ksft_exit_fail_msg("snprintf failed! %d\n", ret);
+
+	fd = open(buf, O_RDWR);
+	if (fd < 0)
+		ksft_exit_fail_msg("open %s failed: %s\n", buf, strerror(errno));
+
+	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 void 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);
+
+	ksft_print_msg("Testing allocation and importing:\n");
+	ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+	if (ret) {
+		ksft_test_result_fail("FAIL (Allocation Failed!) %d\n", ret);
+		return;
+	}
+
+	/* mmap and write a simple pattern */
+	p = mmap(NULL, ONE_MEG, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd, 0);
+	if (p == MAP_FAILED) {
+		ksft_test_result_fail("FAIL (mmap() failed): %s\n", strerror(errno));
+		goto close_and_return;
+	}
+
+	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) {
+		ksft_test_result_skip("Could not open vgem %d\n", importer_fd);
+	} else {
+		ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle);
+		ksft_test_result(ret >= 0, "Import buffer %d\n", ret);
+	}
+
+	ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START);
+	if (ret < 0) {
+		ksft_print_msg("FAIL (DMA_BUF_SYNC_START failed!) %d\n", ret);
+		goto out;
+	}
+
+	memset(p, 0xff, ONE_MEG);
+	ret = dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END);
+	if (ret < 0) {
+		ksft_print_msg("FAIL (DMA_BUF_SYNC_END failed!) %d\n", ret);
+		goto out;
+	}
+
+	close_handle(importer_fd, handle);
+	ksft_test_result_pass("%s dmabuf sync succeeded\n", __func__);
+	return;
+
+out:
+	ksft_test_result_fail("%s dmabuf sync failed\n", __func__);
+	munmap(p, ONE_MEG);
+	close(importer_fd);
+
+close_and_return:
+	close(dmabuf_fd);
+	close(heap_fd);
+}
+
+static void test_alloc_zeroed(char *heap_name, size_t size)
+{
+	int heap_fd = -1, dmabuf_fd[32];
+	int i, j, k, ret;
+	void *p = NULL;
+	char *c;
+
+	ksft_print_msg("Testing alloced %ldk buffers are zeroed:\n", size / 1024);
+	heap_fd = dmabuf_heap_open(heap_name);
+
+	/* 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) {
+			ksft_test_result_fail("FAIL (Allocation (%i) failed) %d\n", i, ret);
+			goto close_and_return;
+		}
+
+		/* mmap and fill with simple pattern */
+		p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
+		if (p == MAP_FAILED) {
+			ksft_test_result_fail("FAIL (mmap() failed!): %s\n", strerror(errno));
+			goto close_and_return;
+		}
+
+		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]);
+	ksft_test_result_pass("Allocate and fill a bunch of buffers\n");
+
+	/* 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) {
+			ksft_test_result_fail("FAIL (Allocation (%i) failed) %d\n", i, ret);
+			goto close_and_return;
+		}
+
+		/* mmap and validate everything is zero */
+		p = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd[i], 0);
+		if (p == MAP_FAILED) {
+			ksft_test_result_fail("FAIL (mmap() failed!): %s\n", strerror(errno));
+			goto close_and_return;
+		}
+
+		dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_START);
+		c = (char *)p;
+		for (j = 0; j < size; j++) {
+			if (c[j] != 0) {
+				ksft_print_msg("FAIL (Allocated buffer not zeroed @ %i)\n", j);
+				dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
+				munmap(p, size);
+				goto out;
+			}
+		}
+		dmabuf_sync(dmabuf_fd[i], DMA_BUF_SYNC_END);
+		munmap(p, size);
+	}
+
+out:
+	ksft_test_result(i == 32, "Allocate and validate all buffers are zeroed\n");
+
+close_and_return:
+	/* close them all */
+	for (k = 0; k < i; k++)
+		close(dmabuf_fd[k]);
+
+	close(heap_fd);
+	return;
+}
+
+/* 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 void test_alloc_compat(char *heap_name)
+{
+	int ret, heap_fd = -1, dmabuf_fd = -1;
+
+	heap_fd = dmabuf_heap_open(heap_name);
+
+	ksft_print_msg("Testing (theoretical) older alloc compat:\n");
+	ret = dmabuf_heap_alloc_older(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+	if (dmabuf_fd >= 0)
+		close(dmabuf_fd);
+	ksft_test_result(!ret, "dmabuf_heap_alloc_older\n");
+
+	ksft_print_msg("Testing (theoretical) newer alloc compat:\n");
+	ret = dmabuf_heap_alloc_newer(heap_fd, ONE_MEG, 0, &dmabuf_fd);
+	if (dmabuf_fd >= 0)
+		close(dmabuf_fd);
+	ksft_test_result(!ret, "dmabuf_heap_alloc_newer\n");
+
+	close(heap_fd);
+}
+
+static void test_alloc_errors(char *heap_name)
+{
+	int heap_fd = -1, dmabuf_fd = -1;
+	int ret;
+
+	heap_fd = dmabuf_heap_open(heap_name);
+
+	ksft_print_msg("Testing expected error cases:\n");
+	ret = dmabuf_heap_alloc(0, ONE_MEG, 0x111111, &dmabuf_fd);
+	ksft_test_result(ret, "Error expected on invalid fd %d\n", ret);
+
+	ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0x111111, &dmabuf_fd);
+	ksft_test_result(ret, "Error expected on invalid heap flags %d\n", ret);
+
+	ret = dmabuf_heap_alloc_fdflags(heap_fd, ONE_MEG,
+					~(O_RDWR | O_CLOEXEC), 0, &dmabuf_fd);
+	ksft_test_result(ret, "Error expected on invalid heap flags %d\n", ret);
+
+	if (dmabuf_fd >= 0)
+		close(dmabuf_fd);
+	close(heap_fd);
+}
+
+static int numer_of_heaps(void)
+{
+	DIR *d = opendir(DEVPATH);
+	struct dirent *dir;
+	int heaps = 0;
+
+	while ((dir = readdir(d))) {
+		if (!strncmp(dir->d_name, ".", 2))
+			continue;
+		if (!strncmp(dir->d_name, "..", 3))
+			continue;
+		heaps++;
+	}
+
+	return heaps;
+}
+
+int main(void)
+{
+	struct dirent *dir;
+	DIR *d;
+
+	ksft_print_header();
+
+	d = opendir(DEVPATH);
+	if (!d) {
+		ksft_print_msg("No %s directory?\n", DEVPATH);
+		return KSFT_SKIP;
+	}
+
+	ksft_set_plan(11 * numer_of_heaps());
+
+	while ((dir = readdir(d))) {
+		if (!strncmp(dir->d_name, ".", 2))
+			continue;
+		if (!strncmp(dir->d_name, "..", 3))
+			continue;
+
+		ksft_print_msg("Testing heap: %s\n", dir->d_name);
+		ksft_print_msg("=======================================\n");
+		test_alloc_and_import(dir->d_name);
+		test_alloc_zeroed(dir->d_name, 4 * 1024);
+		test_alloc_zeroed(dir->d_name, ONE_MEG);
+		test_alloc_compat(dir->d_name);
+		test_alloc_errors(dir->d_name);
+	}
+	closedir(d);
+
+	ksft_finished();
+}