[linux-block.git] / include / drm / drm_accel.h

/* 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

/**
 * 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)

void accel_core_exit(void);
int accel_core_init(void);
void accel_minor_remove(int index);
int accel_minor_alloc(void);
void accel_minor_replace(struct drm_minor *minor, int index);
void accel_set_device_instance_params(struct device *kdev, int index);
int accel_open(struct inode *inode, struct file *filp);
void accel_debugfs_init(struct drm_minor *minor, int minor_id);

#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_minor_remove(int index)
{
}

static inline int accel_minor_alloc(void)
{
	return -EOPNOTSUPP;
}

static inline void accel_minor_replace(struct drm_minor *minor, int index)
{
}

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

static inline void accel_debugfs_init(struct drm_minor *minor, int minor_id)
{
}

#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */

#endif /* DRM_ACCEL_H_ */
Commit	Line	Data
8bf48897 OG	1	/* SPDX-License-Identifier: GPL-2.0
	2	*
	3	* Copyright 2022 HabanaLabs, Ltd.
	4	* All Rights Reserved.
	5	*
	6	*/
	7
	8	#ifndef DRM_ACCEL_H_
	9	#define DRM_ACCEL_H_
	10
2c204f3d OG	11	#include <drm/drm_file.h>
2c204f3d OG	12
8bf48897	13	#define ACCEL_MAJOR 261
2c204f3d OG	14	#define ACCEL_MAX_MINORS 256
	15
	16	/**
	17	* DRM_ACCEL_FOPS - Default drm accelerators file operations
	18	*
	19	* This macro provides a shorthand for setting the accelerator file ops in the
	20	* &file_operations structure. If all you need are the default ops, use
	21	* DEFINE_DRM_ACCEL_FOPS instead.
	22	*/
	23	#define DRM_ACCEL_FOPS \
	24	.open = accel_open,\
	25	.release = drm_release,\
	26	.unlocked_ioctl = drm_ioctl,\
	27	.compat_ioctl = drm_compat_ioctl,\
	28	.poll = drm_poll,\
	29	.read = drm_read,\
e868cc59 JH	30	.llseek = noop_llseek, \
e868cc59 JH	31	.mmap = drm_gem_mmap
2c204f3d OG	32
	33	/**
	34	* DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
	35	* @name: name for the generated structure
	36	*
	37	* This macro autogenerates a suitable &struct file_operations for accelerators based
	38	* drivers, which can be assigned to &drm_driver.fops. Note that this structure
	39	* cannot be shared between drivers, because it contains a reference to the
	40	* current module using THIS_MODULE.
	41	*
	42	* Note that the declaration is already marked as static - if you need a
	43	* non-static version of this you're probably doing it wrong and will break the
	44	* THIS_MODULE reference by accident.
	45	*/
	46	#define DEFINE_DRM_ACCEL_FOPS(name) \
	47	static const struct file_operations name = {\
	48	.owner = THIS_MODULE,\
	49	DRM_ACCEL_FOPS,\
	50	}
8bf48897 OG	51
	52	#if IS_ENABLED(CONFIG_DRM_ACCEL)
	53
	54	void accel_core_exit(void);
	55	int accel_core_init(void);
2c204f3d OG	56	void accel_minor_remove(int index);
	57	int accel_minor_alloc(void);
	58	void accel_minor_replace(struct drm_minor *minor, int index);
	59	void accel_set_device_instance_params(struct device *kdev, int index);
	60	int accel_open(struct inode inode, struct file filp);
	61	void accel_debugfs_init(struct drm_minor *minor, int minor_id);
8bf48897 OG	62
	63	#else
	64
	65	static inline void accel_core_exit(void)
	66	{
	67	}
	68
	69	static inline int __init accel_core_init(void)
	70	{
	71	/* Return 0 to allow drm_core_init to complete successfully */
	72	return 0;
	73	}
	74
2c204f3d OG	75	static inline void accel_minor_remove(int index)
	76	{
	77	}
	78
	79	static inline int accel_minor_alloc(void)
	80	{
	81	return -EOPNOTSUPP;
	82	}
	83
	84	static inline void accel_minor_replace(struct drm_minor *minor, int index)
	85	{
	86	}
	87
	88	static inline void accel_set_device_instance_params(struct device *kdev, int index)
	89	{
	90	}
	91
	92	static inline void accel_debugfs_init(struct drm_minor *minor, int minor_id)
	93	{
	94	}
	95
8bf48897 OG	96	#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
	97
	98	#endif /* DRM_ACCEL_H_ */