/*
 * Copyright (C) 2013-2014, 2016 ARM Limited. All rights reserved.
 * 
 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
 * 
 * A copy of the licence is included with the program, and can also be obtained from Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
#include <linux/fs.h>       /* file system operations */
#include <linux/version.h>

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0)
#include <linux/uaccess.h>
#else
#include <asm/uaccess.h>
#endif

#include "mali_ukk.h"
#include "mali_osk.h"
#include "mali_kernel_common.h"
#include "mali_session.h"
#include "mali_ukk_wrappers.h"

#include "mali_soft_job.h"
#include "mali_timeline.h"

int soft_job_start_wrapper(struct mali_session_data *session, _mali_uk_soft_job_start_s __user *uargs)
{
	_mali_uk_soft_job_start_s kargs;
	u32 type, point;
	u64 user_job;
	struct mali_timeline_fence fence;
	struct mali_soft_job *job = NULL;
	u32 __user *job_id_ptr = NULL;

	/* If the job was started successfully, 0 is returned.  If there was an error, but the job
	 * was started, we return -ENOENT.  For anything else returned, the job was not started. */

	MALI_CHECK_NON_NULL(uargs, -EINVAL);
	MALI_CHECK_NON_NULL(session, -EINVAL);

	MALI_DEBUG_ASSERT_POINTER(session->soft_job_system);

	if (0 != copy_from_user(&kargs, uargs, sizeof(kargs))) {
		return -EFAULT;
	}

	type = kargs.type;
	user_job = kargs.user_job;
	job_id_ptr = (u32 __user *)(uintptr_t)kargs.job_id_ptr;

	mali_timeline_fence_copy_uk_fence(&fence, &kargs.fence);

	if ((MALI_SOFT_JOB_TYPE_USER_SIGNALED != type) && (MALI_SOFT_JOB_TYPE_SELF_SIGNALED != type)) {
		MALI_DEBUG_PRINT_ERROR(("Invalid soft job type specified\n"));
		return -EINVAL;
	}

	/* Create soft job. */
	job = mali_soft_job_create(session->soft_job_system, (enum mali_soft_job_type)type, user_job);
	if (unlikely(NULL == job)) {
		return map_errcode(_MALI_OSK_ERR_NOMEM);
	}

	/* Write job id back to user space. */
	if (0 != put_user(job->id, job_id_ptr)) {
		MALI_PRINT_ERROR(("Mali Soft Job: failed to put job id"));
		mali_soft_job_destroy(job);
		return map_errcode(_MALI_OSK_ERR_NOMEM);
	}

	/* Start soft job. */
	point = mali_soft_job_start(job, &fence);

	if (0 != put_user(point, &uargs->point)) {
		/* Let user space know that something failed after the job was started. */
		return -ENOENT;
	}

	return 0;
}

int soft_job_signal_wrapper(struct mali_session_data *session, _mali_uk_soft_job_signal_s __user *uargs)
{
	u32 job_id;
	_mali_osk_errcode_t err;

	MALI_DEBUG_ASSERT_POINTER(session);

	if (0 != get_user(job_id, &uargs->job_id)) return -EFAULT;

	err = mali_soft_job_system_signal_job(session->soft_job_system, job_id);

	return map_errcode(err);
}