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
11#include <drm/drm_file.h>
12
13#define ACCEL_MAJOR 261
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,\
30 .llseek = noop_llseek, \
31 .mmap = drm_gem_mmap, \
32 .fop_flags = FOP_UNSIGNED_OFFSET
33
34/**
35 * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
36 * @name: name for the generated structure
37 *
38 * This macro autogenerates a suitable &struct file_operations for accelerators based
39 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
40 * cannot be shared between drivers, because it contains a reference to the
41 * current module using THIS_MODULE.
42 *
43 * Note that the declaration is already marked as static - if you need a
44 * non-static version of this you're probably doing it wrong and will break the
45 * THIS_MODULE reference by accident.
46 */
47#define DEFINE_DRM_ACCEL_FOPS(name) \
48 static const struct file_operations name = {\
49 .owner = THIS_MODULE,\
50 DRM_ACCEL_FOPS,\
51 }
52
53#if IS_ENABLED(CONFIG_DRM_ACCEL)
54
55extern struct xarray accel_minors_xa;
56
57void accel_core_exit(void);
58int accel_core_init(void);
59void accel_set_device_instance_params(struct device *kdev, int index);
60int accel_open(struct inode *inode, struct file *filp);
61void accel_debugfs_init(struct drm_device *dev);
62void accel_debugfs_register(struct drm_device *dev);
63
64#else
65
66static inline void accel_core_exit(void)
67{
68}
69
70static inline int __init accel_core_init(void)
71{
72 /* Return 0 to allow drm_core_init to complete successfully */
73 return 0;
74}
75
76static inline void accel_set_device_instance_params(struct device *kdev, int index)
77{
78}
79
80static inline void accel_debugfs_init(struct drm_device *dev)
81{
82}
83
84static inline void accel_debugfs_register(struct drm_device *dev)
85{
86}
87
88#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
89
90#endif /* DRM_ACCEL_H_ */
91

source code of linux/include/drm/drm_accel.h