/*
 * Copyright © 2017 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.
 */

#include <errno.h>
#include <xf86drm.h>

#include "igt.h"
#include "igt_syncobj.h"

/**
 * SECTION:igt_syncobj
 * @short_description: Library with syncobj helpers
 * @title: syncobj
 * @include: igt_syncobj.h
 *
 * This library contains helpers for sync object tests.
 */

static int
__syncobj_create(int fd, uint32_t *handle, uint32_t flags)
{
	struct drm_syncobj_create create = { 0 };
	int err = 0;

	create.flags = flags;
	if (drmIoctl(fd, DRM_IOCTL_SYNCOBJ_CREATE, &create))
		err = -errno;
	*handle = create.handle;
	return err;
}

/**
 * syncobj_create
 * @fd: The DRM file descriptor
 * @flags: Flags to pass syncobj create
 *
 * Create a syncobj with the flags.
 *
 * Returns: A newly created syncobj
 */
uint32_t
syncobj_create(int fd, uint32_t flags)
{
	uint32_t handle;
	igt_assert_eq(__syncobj_create(fd, &handle, flags), 0);
	igt_assert(handle);
	return handle;
}

static int
__syncobj_destroy(int fd, uint32_t handle)
{
	struct drm_syncobj_destroy destroy = { 0 };
	int err = 0;

	destroy.handle = handle;
	if (drmIoctl(fd, DRM_IOCTL_SYNCOBJ_DESTROY, &destroy))
		err = -errno;
	return err;
}

/**
 * syncobj_destroy:
 * @fd: The DRM file descriptor
 * @handle: The handle to the syncobj to destroy
 * Destroy a syncobj.
 */
void
syncobj_destroy(int fd, uint32_t handle)
{
	igt_assert_eq(__syncobj_destroy(fd, handle), 0);
}

int
__syncobj_handle_to_fd(int fd, struct drm_syncobj_handle *args)
{
	int err = 0;
	if (drmIoctl(fd, DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, args))
		err = -errno;
	return err;
}

/**
 * syncobj_handle_to_fd:
 * @fd: The DRM file descriptor
 * @handle: Handle to syncobj
 * @flags: Flags to handle to fd ioctl.
 *
 * Convert a syncobj handle to an fd using the flags.
 *
 * Returns: a file descriptor (either syncobj or sync_file.
 */
int
syncobj_handle_to_fd(int fd, uint32_t handle, uint32_t flags)
{
	struct drm_syncobj_handle args = { 0 };
	args.handle = handle;
	args.flags = flags;
	igt_assert_eq(__syncobj_handle_to_fd(fd, &args), 0);
	igt_assert(args.fd >= 0);
	return args.fd;
}

int
__syncobj_fd_to_handle(int fd, struct drm_syncobj_handle *args)
{
	int err = 0;
	if (drmIoctl(fd, DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, args))
		err = -errno;
	return err;
}

/**
 * syncobj_fd_to_handle:
 * @fd: The DRM file descriptor
 * @syncobj_fd: syncobj fd to convert
 * @flags: Flags to the syncobj fd to handle ioctl.
 *
 * Convert a syncobj fd a syncobj handle using the flags.
 *
 * Returns: a syncobj handle.
 */
uint32_t
syncobj_fd_to_handle(int fd, int syncobj_fd, uint32_t flags)
{
	struct drm_syncobj_handle args = { 0 };
	args.fd = syncobj_fd;
	args.flags = flags;
	igt_assert_eq(__syncobj_fd_to_handle(fd, &args), 0);
	igt_assert(args.handle > 0);
	return args.handle;
}

/**
 * syncobj_import_sync_file:
 * @fd: The DRM file descriptor
 * @handle: Handle to the syncobt to import file into
 * @sync_file: The sync_file fd to import state from.
 *
 * Import a sync_file fd into a syncobj handle.
 */
void
syncobj_import_sync_file(int fd, uint32_t handle, int sync_file)
{
	struct drm_syncobj_handle args = { 0 };
	args.handle = handle;
	args.fd = sync_file;
	args.flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE;
	igt_assert_eq(__syncobj_fd_to_handle(fd, &args), 0);
}

int
__syncobj_wait(int fd, struct local_syncobj_wait *args)
{
	int err = 0;
	if (drmIoctl(fd, LOCAL_IOCTL_SYNCOBJ_WAIT, args))
		err = -errno;
	return err;
}

int
syncobj_wait_err(int fd, uint32_t *handles, uint32_t count,
		 uint64_t abs_timeout_nsec, uint32_t flags)
{
	struct local_syncobj_wait wait;

	wait.handles = to_user_pointer(handles);
	wait.timeout_nsec = abs_timeout_nsec;
	wait.count_handles = count;
	wait.flags = flags;
	wait.first_signaled = 0;
	wait.pad = 0;

	return __syncobj_wait(fd, &wait);
}

/**
 * syncobj_wait:
 * @fd: The DRM file descriptor
 * @handles: List of syncobj handles to wait for.
 * @count: Count of handles
 * @abs_timeout_nsec: Absolute wait timeout in nanoseconds.
 * @flags: Wait ioctl flags.
 * @first_signaled: Returned handle for first signaled syncobj.
 *
 * Waits in the kernel for any/all the requested syncobjs
 * using the timeout and flags.
 * Returns: bool value - false = timedout, true = signaled
 */
bool
syncobj_wait(int fd, uint32_t *handles, uint32_t count,
	     uint64_t abs_timeout_nsec, uint32_t flags,
	     uint32_t *first_signaled)
{
	struct local_syncobj_wait wait;
	int ret;

	wait.handles = to_user_pointer(handles);
	wait.timeout_nsec = abs_timeout_nsec;
	wait.count_handles = count;
	wait.flags = flags;
	wait.first_signaled = 0;
	wait.pad = 0;

	ret = __syncobj_wait(fd, &wait);
	if (ret == ETIME)
		return false;

	igt_assert_eq(ret, 0);
	if (first_signaled)
		*first_signaled = wait.first_signaled;

	return true;
}

static int
__syncobj_reset(int fd, uint32_t *handles, uint32_t count)
{
	struct local_syncobj_array array = { 0 };
	int err = 0;

	array.handles = to_user_pointer(handles);
	array.count_handles = count;
	if (drmIoctl(fd, LOCAL_IOCTL_SYNCOBJ_RESET, &array))
		err = -errno;
	return err;
}

/**
 * syncobj_reset:
 * @fd: The DRM file descriptor.
 * @handles: Array of syncobj handles to reset
 * @count: Count of syncobj handles.
 *
 * Reset state of a set of syncobjs.
 */
void
syncobj_reset(int fd, uint32_t *handles, uint32_t count)
{
	igt_assert_eq(__syncobj_reset(fd, handles, count), 0);
}

static int
__syncobj_signal(int fd, uint32_t *handles, uint32_t count)
{
	struct local_syncobj_array array = { 0 };
	int err = 0;

	array.handles = to_user_pointer(handles);
	array.count_handles = count;
	if (drmIoctl(fd, LOCAL_IOCTL_SYNCOBJ_SIGNAL, &array))
		err = -errno;
	return err;
}

/**
 * syncobj_signal:
 * @fd: The DRM file descriptor.
 * @handles: Array of syncobj handles to signal
 * @count: Count of syncobj handles.
 *
 * Signal a set of syncobjs.
 */
void
syncobj_signal(int fd, uint32_t *handles, uint32_t count)
{
	igt_assert_eq(__syncobj_signal(fd, handles, count), 0);
}