tests: add basic re-importing prime test

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

lib/drmtest.c

@@ -375,6 +375,33 @@ int gem_madvise(int fd, uint32_t handle, int state)
 	return madv.retained;
 }
 
+/* prime */
+int prime_handle_to_fd(int fd, uint32_t handle)
+{
+	struct drm_prime_handle args;
+
+	args.handle = handle;
+	args.flags = DRM_CLOEXEC;
+	args.fd = -1;
+
+	do_ioctl(fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
+
+	return args.fd;
+}
+
+uint32_t prime_fd_to_handle(int fd, int dma_buf_fd)
+{
+	struct drm_prime_handle args;
+
+	args.fd = dma_buf_fd;
+	args.flags = 0;
+	args.handle = 0;
+
+	do_ioctl(fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
+
+	return args.handle;
+}
+
 /* signal interrupt helpers */
 static pid_t signal_helper = -1;
 long long int sig_stat;

lib/drmtest.h

@@ -65,6 +65,10 @@ int gem_madvise(int fd, uint32_t handle, int state);
 bool gem_uses_aliasing_ppgtt(int fd);
 int gem_available_fences(int fd);
 
+/* prime */
+int prime_handle_to_fd(int fd, uint32_t handle);
+uint32_t prime_fd_to_handle(int fd, int dma_buf_fd);
+
 /* generally useful helpers */
 void drmtest_fork_signal_helper(void);
 void drmtest_stop_signal_helper(void);

tests/Makefile.am

@@ -70,6 +70,7 @@ TESTS_progs = \
 	gem_ctx_bad_exec \
 	gem_ctx_basic \
 	gem_reg_read \
+	prime_self_import \
 	$(NULL)
 
 # IMPORTANT: The ZZ_ tests need to be run last!

tests/prime_self_import.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+/*
+ * Testcase: Check whether prime import/export works on the same device
+ *
+ * ... but with different fds, i.e. the wayland usecase.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+
+#define BO_SIZE (16*1024)
+
+static void
+check_bo(int fd1, uint32_t handle1, int fd2, uint32_t handle2)
+{
+	char *ptr1, *ptr2;
+	static char counter = 0;
+
+	ptr1 = gem_mmap(fd1, handle1, BO_SIZE, PROT_READ | PROT_WRITE);
+	ptr2 = gem_mmap(fd2, handle2, BO_SIZE, PROT_READ | PROT_WRITE);
+
+	assert(ptr1);
+
+	memset(ptr1, counter, BO_SIZE);
+	assert(memcmp(ptr1, ptr2, BO_SIZE) == 0);
+
+	munmap(ptr1, BO_SIZE);
+	munmap(ptr2, BO_SIZE);
+
+	counter++;
+}
+
+int main(int argc, char **argv)
+{
+	int fd1, fd2;
+	uint32_t handle, handle_import1, handle_import2, handle_selfimport;
+	int dma_buf_fd;
+
+	fd1 = drm_open_any();
+	fd2 = drm_open_any();
+
+	handle = gem_create(fd1, BO_SIZE);
+
+	dma_buf_fd = prime_handle_to_fd(fd1, handle);
+	handle_import1 = prime_fd_to_handle(fd2, dma_buf_fd);
+
+	check_bo(fd1, handle, fd2, handle_import1);
+
+	/* reimport should give us the same handle so that userspace can check
+	 * whether it has that bo already somewhere. */
+	handle_import2 = prime_fd_to_handle(fd2, dma_buf_fd);
+	assert(handle_import1 == handle_import2);
+
+	/* Same for re-importing on the exporting fd. */
+	handle_selfimport = prime_fd_to_handle(fd1, dma_buf_fd);
+	assert(handle == handle_selfimport);
+
+	/* close dma_buf, check whether nothing disappears. */
+	close(dma_buf_fd);
+	check_bo(fd1, handle, fd2, handle_import1);
+
+	gem_close(fd1, handle);
+	check_bo(fd2, handle_import1, fd2, handle_import1);
+
+	/* re-import into old exporter */
+	dma_buf_fd = prime_handle_to_fd(fd2, handle_import1);
+	handle = prime_fd_to_handle(fd1, dma_buf_fd);
+	check_bo(fd1, handle, fd2, handle_import1);
+
+	/* Completely rip out exporting fd. */
+	close(fd1);
+	check_bo(fd2, handle_import1, fd2, handle_import1);
+
+	return 0;
+}