/* SPDX-License-Identifier: GPL-2.0
 *
 * Copyright 2022 HabanaLabs, Ltd.
 * All Rights Reserved.
 *
 */

#ifndef DRM_ACCEL_H_
#define DRM_ACCEL_H_

#include <drm/drm_file.h>

#define ACCEL_MAJOR             261
#define ACCEL_MAX_MINORS        256

/**
 * DRM_ACCEL_FOPS - Default drm accelerators file operations
 *
 * This macro provides a shorthand for setting the accelerator file ops in the
 * &file_operations structure.  If all you need are the default ops, use
 * DEFINE_DRM_ACCEL_FOPS instead.
 */
#define DRM_ACCEL_FOPS \
        .open           = accel_open,\
        .release        = drm_release,\
        .unlocked_ioctl = drm_ioctl,\
        .compat_ioctl   = drm_compat_ioctl,\
        .poll           = drm_poll,\
        .read           = drm_read,\
        .llseek         = noop_llseek, \
        .mmap           = drm_gem_mmap, \
        .fop_flags      = FOP_UNSIGNED_OFFSET

/**
 * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
 * @name: name for the generated structure
 *
 * This macro autogenerates a suitable &struct file_operations for accelerators based
 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
 * cannot be shared between drivers, because it contains a reference to the
 * current module using THIS_MODULE.
 *
 * Note that the declaration is already marked as static - if you need a
 * non-static version of this you're probably doing it wrong and will break the
 * THIS_MODULE reference by accident.
 */
#define DEFINE_DRM_ACCEL_FOPS(name) \
        static const struct file_operations name = {\
                .owner          = THIS_MODULE,\
                DRM_ACCEL_FOPS,\
        }

#if IS_ENABLED(CONFIG_DRM_ACCEL)

extern struct xarray accel_minors_xa;

void accel_core_exit(void);
int accel_core_init(void);
void accel_set_device_instance_params(struct device *kdev, int index);
int accel_open(struct inode *inode, struct file *filp);
void accel_debugfs_register(struct drm_device *dev);

#else

static inline void accel_core_exit(void)
{
}

static inline int __init accel_core_init(void)
{
        /* Return 0 to allow drm_core_init to complete successfully */
        return 0;
}

static inline void accel_set_device_instance_params(struct device *kdev, int index)
{
}

static inline void accel_debugfs_register(struct drm_device *dev)
{
}

#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */

#endif /* DRM_ACCEL_H_ */