/*

 * Copyright © 2015 Canonical Ltd. (Maarten Lankhorst)

 *

 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.

 */

#include <sys/ioctl.h>

#include <dlfcn.h>

#include <fcntl.h>

#include <stdio.h>

#include <unistd.h>

#include <errno.h>

#include <pthread.h>

#include "xf86drm.h"

#include "nouveau.h"

static typeof(ioctl) *old_ioctl;

static int failed;

static int import_fd;

int ioctl(int fd, unsigned long request, ...)

{

	va_list va;

	int ret;

	void *arg;

	va_start(va, request);

	arg = va_arg(va, void *);

	ret = old_ioctl(fd, request, arg);

	va_end(va);

	if (ret < 0 && request == DRM_IOCTL_GEM_CLOSE && errno == EINVAL)

		failed = 1;

	return ret;

}

static void *

openclose(void *dev)

{

	struct nouveau_device *nvdev = dev;

	struct nouveau_bo *bo = NULL;

	int i;

	for (i = 0; i < 100000; ++i) {

		if (!nouveau_bo_prime_handle_ref(nvdev, import_fd, &bo))

			nouveau_bo_ref(NULL, &bo);

	}

	return NULL;

}

int main(int argc, char *argv[])

{

	drmVersionPtr version;

	const char *device = NULL;

	int err, fd, fd2;

	struct nouveau_device *nvdev, *nvdev2;

	struct nouveau_bo *bo;

	pthread_t t1, t2;

	old_ioctl = dlsym(RTLD_NEXT, "ioctl");

	if (argc < 2) {

		fd = drmOpenWithType("nouveau", NULL, DRM_NODE_RENDER);

		if (fd >= 0)

			fd2 = drmOpenWithType("nouveau", NULL, DRM_NODE_RENDER);

	} else {

		device = argv[1];

		fd = open(device, O_RDWR);

		if (fd >= 0)

			fd2 = open(device, O_RDWR);

		else

			fd2 = fd = -errno;

	}

	if (fd < 0) {

		fprintf(stderr, "Opening nouveau render node failed with %i\n", fd);

		return device ? -fd : 77;

	}

	if (fd2 < 0) {

		fprintf(stderr, "Opening second nouveau render node failed with %i\n", -errno);

		return errno;

	}

	version = drmGetVersion(fd);

	if (version) {

		printf("Version: %d.%d.%d\n", version->version_major,

		       version->version_minor, version->version_patchlevel);

		printf("  Name: %s\n", version->name);

		printf("  Date: %s\n", version->date);

		printf("  Description: %s\n", version->desc);

		drmFreeVersion(version);

	}

	err = nouveau_device_wrap(fd, 0, &nvdev);

	if (!err)

		err = nouveau_device_wrap(fd2, 0, &nvdev2);

	if (err < 0)

		return 1;

	err = nouveau_bo_new(nvdev2, NOUVEAU_BO_GART, 0, 4096, NULL, &bo);

	if (!err)

		err = nouveau_bo_set_prime(bo, &import_fd);

	if (!err) {

		pthread_create(&t1, NULL, openclose, nvdev);

		pthread_create(&t2, NULL, openclose, nvdev);

	}

	pthread_join(t1, NULL);

	pthread_join(t2, NULL);

	close(import_fd);

	nouveau_bo_ref(NULL, &bo);

	nouveau_device_del(&nvdev2);

	nouveau_device_del(&nvdev);

	if (device) {

		close(fd2);

		close(fd);

	} else {

		drmClose(fd2);

		drmClose(fd);

	}

	if (failed)

		fprintf(stderr, "DRM_IOCTL_GEM_CLOSE failed with EINVAL,\n"

				"race in opening/closing bo is likely.\n");

	return failed;

}