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 .fop_flags = FOP_UNSIGNED_OFFSET 32 .fop_flags = FOP_UNSIGNED_OFFSET
33 33
34 /** 34 /**
35 * DEFINE_DRM_ACCEL_FOPS() - macro to generate 35 * DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
36 * @name: name for the generated structure 36 * @name: name for the generated structure
37 * 37 *
38 * This macro autogenerates a suitable &struct 38 * This macro autogenerates a suitable &struct file_operations for accelerators based
39 * drivers, which can be assigned to &drm_driv 39 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
40 * cannot be shared between drivers, because i 40 * cannot be shared between drivers, because it contains a reference to the
41 * current module using THIS_MODULE. 41 * current module using THIS_MODULE.
42 * 42 *
43 * Note that the declaration is already marked 43 * Note that the declaration is already marked as static - if you need a
44 * non-static version of this you're probably 44 * non-static version of this you're probably doing it wrong and will break the
45 * THIS_MODULE reference by accident. 45 * THIS_MODULE reference by accident.
46 */ 46 */
47 #define DEFINE_DRM_ACCEL_FOPS(name) \ 47 #define DEFINE_DRM_ACCEL_FOPS(name) \
48 static const struct file_operations na 48 static const struct file_operations name = {\
49 .owner = THIS_MODULE, 49 .owner = THIS_MODULE,\
50 DRM_ACCEL_FOPS,\ 50 DRM_ACCEL_FOPS,\
51 } 51 }
52 52
53 #if IS_ENABLED(CONFIG_DRM_ACCEL) 53 #if IS_ENABLED(CONFIG_DRM_ACCEL)
54 54
55 extern struct xarray accel_minors_xa; 55 extern struct xarray accel_minors_xa;
56 56
57 void accel_core_exit(void); 57 void accel_core_exit(void);
58 int accel_core_init(void); 58 int accel_core_init(void);
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_set_device_instance_p 76 static inline void accel_set_device_instance_params(struct device *kdev, int index)
77 { 77 {
78 } 78 }
79 79
80 static inline void accel_debugfs_init(struct d 80 static inline void accel_debugfs_init(struct drm_device *dev)
81 { 81 {
82 } 82 }
83 83
84 static inline void accel_debugfs_register(stru 84 static inline void accel_debugfs_register(struct drm_device *dev)
85 { 85 {
86 } 86 }
87 87
88 #endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */ 88 #endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
89 89
90 #endif /* DRM_ACCEL_H_ */ 90 #endif /* DRM_ACCEL_H_ */
91 91
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