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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
32/**
33 * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
34 * @name: name for the generated structure
35 *
36 * This macro autogenerates a suitable &struct file_operations for accelerators based
37 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
38 * cannot be shared between drivers, because it contains a reference to the
39 * current module using THIS_MODULE.
40 *
41 * Note that the declaration is already marked as static - if you need a
42 * non-static version of this you're probably doing it wrong and will break the
43 * THIS_MODULE reference by accident.
44 */
45#define DEFINE_DRM_ACCEL_FOPS(name) \
46 static const struct file_operations name = {\
47 .owner = THIS_MODULE,\
48 DRM_ACCEL_FOPS,\
49 }
50
51#if IS_ENABLED(CONFIG_DRM_ACCEL)
52
53void accel_core_exit(void);
54int accel_core_init(void);
55void accel_minor_remove(int index);
56int accel_minor_alloc(void);
57void accel_minor_replace(struct drm_minor *minor, int index);
58void accel_set_device_instance_params(struct device *kdev, int index);
59int accel_open(struct inode *inode, struct file *filp);
60void accel_debugfs_init(struct drm_minor *minor, int minor_id);
61
62#else
63
64static inline void accel_core_exit(void)
65{
66}
67
68static inline int __init accel_core_init(void)
69{
70 /* Return 0 to allow drm_core_init to complete successfully */
71 return 0;
72}
73
74static inline void accel_minor_remove(int index)
75{
76}
77
78static inline int accel_minor_alloc(void)
79{
80 return -EOPNOTSUPP;
81}
82
83static inline void accel_minor_replace(struct drm_minor *minor, int index)
84{
85}
86
87static inline void accel_set_device_instance_params(struct device *kdev, int index)
88{
89}
90
91static inline void accel_debugfs_init(struct drm_minor *minor, int minor_id)
92{
93}
94
95#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
96
97#endif /* DRM_ACCEL_H_ */