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
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 }
51
52 #if IS_ENABLED(CONFIG_DRM_ACCEL)
53
54 void accel_core_exit(void);
55 int accel_core_init(void);
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_device *dev);
62 void accel_debugfs_register(struct drm_device *dev);
63
64 #else
65
66 static inline void accel_core_exit(void)
67 {
68 }
69
70 static inline int __init accel_core_init(void)
71 {
72 /* Return 0 to allow drm_core_init to complete successfully */
73 return 0;
74 }
75
76 static inline void accel_minor_remove(int index)
77 {
78 }
79
80 static inline int accel_minor_alloc(void)
81 {
82 return -EOPNOTSUPP;
83 }
84
85 static inline void accel_minor_replace(struct drm_minor *minor, int index)
86 {
87 }
88
89 static inline void accel_set_device_instance_params(struct device *kdev, int index)
90 {
91 }
92
93 static inline void accel_debugfs_init(struct drm_device *dev)
94 {
95 }
96
97 static inline void accel_debugfs_register(struct drm_device *dev)
98 {
99 }
100
101 #endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
102
103 #endif /* DRM_ACCEL_H_ */
104
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