1 /* SPDX-License-Identifier: GPL-2.0 1 /* SPDX-License-Identifier: GPL-2.0
2 * 2 *
3 * Copyright 2022 HabanaLabs, Ltd. 3 * Copyright 2022 HabanaLabs, Ltd.
4 * All Rights Reserved. 4 * All Rights Reserved.
5 * 5 *
6 */ 6 */
7 7
8 #ifndef DRM_ACCEL_H_ 8 #ifndef DRM_ACCEL_H_
9 #define DRM_ACCEL_H_ 9 #define DRM_ACCEL_H_
10 10
11 #include <drm/drm_file.h> 11 #include <drm/drm_file.h>
12 12
13 #define ACCEL_MAJOR 261 13 #define ACCEL_MAJOR 261
14 #define ACCEL_MAX_MINORS 256 14 #define ACCEL_MAX_MINORS 256
15 15
16 /** 16 /**
17 * DRM_ACCEL_FOPS - Default drm accelerators f 17 * DRM_ACCEL_FOPS - Default drm accelerators file operations
18 * 18 *
19 * This macro provides a shorthand for setting 19 * This macro provides a shorthand for setting the accelerator file ops in the
20 * &file_operations structure. If all you nee 20 * &file_operations structure. If all you need are the default ops, use
21 * DEFINE_DRM_ACCEL_FOPS instead. 21 * DEFINE_DRM_ACCEL_FOPS instead.
22 */ 22 */
23 #define DRM_ACCEL_FOPS \ 23 #define DRM_ACCEL_FOPS \
24 .open = accel_open,\ 24 .open = accel_open,\
25 .release = drm_release,\ 25 .release = drm_release,\
26 .unlocked_ioctl = drm_ioctl,\ 26 .unlocked_ioctl = drm_ioctl,\
27 .compat_ioctl = drm_compat_ioctl,\ 27 .compat_ioctl = drm_compat_ioctl,\
28 .poll = drm_poll,\ 28 .poll = drm_poll,\
29 .read = drm_read,\ 29 .read = drm_read,\
30 .llseek = noop_llseek, \ 30 .llseek = noop_llseek, \
31 .mmap = drm_gem_mmap 31 .mmap = drm_gem_mmap
32 32
33 /** 33 /**
34 * DEFINE_DRM_ACCEL_FOPS() - macro to generate 34 * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
35 * @name: name for the generated structure 35 * @name: name for the generated structure
36 * 36 *
37 * This macro autogenerates a suitable &struct 37 * This macro autogenerates a suitable &struct file_operations for accelerators based
38 * drivers, which can be assigned to &drm_driv 38 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
39 * cannot be shared between drivers, because i 39 * cannot be shared between drivers, because it contains a reference to the
40 * current module using THIS_MODULE. 40 * current module using THIS_MODULE.
41 * 41 *
42 * Note that the declaration is already marked 42 * Note that the declaration is already marked as static - if you need a
43 * non-static version of this you're probably 43 * non-static version of this you're probably doing it wrong and will break the
44 * THIS_MODULE reference by accident. 44 * THIS_MODULE reference by accident.
45 */ 45 */
46 #define DEFINE_DRM_ACCEL_FOPS(name) \ 46 #define DEFINE_DRM_ACCEL_FOPS(name) \
47 static const struct file_operations na 47 static const struct file_operations name = {\
48 .owner = THIS_MODULE, 48 .owner = THIS_MODULE,\
49 DRM_ACCEL_FOPS,\ 49 DRM_ACCEL_FOPS,\
50 } 50 }
51 51
52 #if IS_ENABLED(CONFIG_DRM_ACCEL) 52 #if IS_ENABLED(CONFIG_DRM_ACCEL)
53 53
54 void accel_core_exit(void); 54 void accel_core_exit(void);
55 int accel_core_init(void); 55 int accel_core_init(void);
56 void accel_minor_remove(int index); 56 void accel_minor_remove(int index);
57 int accel_minor_alloc(void); 57 int accel_minor_alloc(void);
58 void accel_minor_replace(struct drm_minor *min 58 void accel_minor_replace(struct drm_minor *minor, int index);
59 void accel_set_device_instance_params(struct d 59 void accel_set_device_instance_params(struct device *kdev, int index);
60 int accel_open(struct inode *inode, struct fil 60 int accel_open(struct inode *inode, struct file *filp);
61 void accel_debugfs_init(struct drm_device *dev 61 void accel_debugfs_init(struct drm_device *dev);
62 void accel_debugfs_register(struct drm_device 62 void accel_debugfs_register(struct drm_device *dev);
63 63
64 #else 64 #else
65 65
66 static inline void accel_core_exit(void) 66 static inline void accel_core_exit(void)
67 { 67 {
68 } 68 }
69 69
70 static inline int __init accel_core_init(void) 70 static inline int __init accel_core_init(void)
71 { 71 {
72 /* Return 0 to allow drm_core_init to 72 /* Return 0 to allow drm_core_init to complete successfully */
73 return 0; 73 return 0;
74 } 74 }
75 75
76 static inline void accel_minor_remove(int inde 76 static inline void accel_minor_remove(int index)
77 { 77 {
78 } 78 }
79 79
80 static inline int accel_minor_alloc(void) 80 static inline int accel_minor_alloc(void)
81 { 81 {
82 return -EOPNOTSUPP; 82 return -EOPNOTSUPP;
83 } 83 }
84 84
85 static inline void accel_minor_replace(struct 85 static inline void accel_minor_replace(struct drm_minor *minor, int index)
86 { 86 {
87 } 87 }
88 88
89 static inline void accel_set_device_instance_p 89 static inline void accel_set_device_instance_params(struct device *kdev, int index)
90 { 90 {
91 } 91 }
92 92
93 static inline void accel_debugfs_init(struct d 93 static inline void accel_debugfs_init(struct drm_device *dev)
94 { 94 {
95 } 95 }
96 96
97 static inline void accel_debugfs_register(stru 97 static inline void accel_debugfs_register(struct drm_device *dev)
98 { 98 {
99 } 99 }
100 100
101 #endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */ 101 #endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
102 102
103 #endif /* DRM_ACCEL_H_ */ 103 #endif /* DRM_ACCEL_H_ */
104 104
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.