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