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 53 void accel_core_exit(void); 54 int accel_core_init(void); 55 void accel_minor_remove(int index); 56 int accel_minor_alloc(void); 57 void accel_minor_replace(struct drm_minor *minor, int index); 58 void accel_set_device_instance_params(struct device *kdev, int index); 59 int accel_open(struct inode *inode, struct file *filp); 60 void accel_debugfs_init(struct drm_minor *minor, int minor_id); 61 62 #else 63 64 static inline void accel_core_exit(void) 65 { 66 } 67 68 static inline int __init accel_core_init(void) 69 { 70 /* Return 0 to allow drm_core_init to complete successfully */ 71 return 0; 72 } 73 74 static inline void accel_minor_remove(int index) 75 { 76 } 77 78 static inline int accel_minor_alloc(void) 79 { 80 return -EOPNOTSUPP; 81 } 82 83 static inline void accel_minor_replace(struct drm_minor *minor, int index) 84 { 85 } 86 87 static inline void accel_set_device_instance_params(struct device *kdev, int index) 88 { 89 } 90 91 static 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_ */ 98