projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e7818584 SH |
1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* | |
| 3 | * Copyright (C) 2021 ARM Ltd. | |
| 4 | */ | |
| 5 | ||
| 6 | #ifndef _LINUX_ARM_FFA_H | |
| 7 | #define _LINUX_ARM_FFA_H | |
| 8 | ||
| 9 | #include <linux/cdev.h> | |
| 10 | #include <linux/device.h> | |
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/types.h> | |
| 13 | #include <linux/uuid.h> | |
| 14 | ||
| 15 | /* FFA Bus/Device/Driver related */ | |
| 16 | struct ffa_device { | |
| 17 | int vm_id; | |
| 18 | uuid_t uuid; | |
| 19 | struct device dev; | |
| 20 | }; | |
| 21 | ||
| 22 | #define to_ffa_dev(d) container_of(d, struct ffa_device, dev) | |
| 23 | ||
| 24 | struct ffa_device_id { | |
| 25 | uuid_t uuid; | |
| 26 | }; | |
| 27 | ||
| 28 | struct ffa_driver { | |
| 29 | const char *name; | |
| 30 | int (*probe)(struct ffa_device *sdev); | |
| 31 | void (*remove)(struct ffa_device *sdev); | |
| 32 | const struct ffa_device_id *id_table; | |
| 33 | ||
| 34 | struct device_driver driver; | |
| 35 | }; | |
| 36 | ||
| 37 | #define to_ffa_driver(d) container_of(d, struct ffa_driver, driver) | |
| 38 | ||
| 39 | static inline void ffa_dev_set_drvdata(struct ffa_device *fdev, void *data) | |
| 40 | { | |
| 41 | fdev->dev.driver_data = data; | |
| 42 | } | |
| 43 | ||
| 44 | #if IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT) | |
| 45 | struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id); | |
| 46 | void ffa_device_unregister(struct ffa_device *ffa_dev); | |
| 47 | int ffa_driver_register(struct ffa_driver *driver, struct module *owner, | |
| 48 | const char *mod_name); | |
| 49 | void ffa_driver_unregister(struct ffa_driver *driver); | |
| 50 | bool ffa_device_is_valid(struct ffa_device *ffa_dev); | |
| 51 | ||
| 52 | #else | |
| 53 | static inline | |
| 54 | struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id) | |
| 55 | { | |
| 56 | return NULL; | |
| 57 | } | |
| 58 | ||
| 59 | static inline void ffa_device_unregister(struct ffa_device *dev) {} | |
| 60 | ||
| 61 | static inline int | |
| 62 | ffa_driver_register(struct ffa_driver *driver, struct module *owner, | |
| 63 | const char *mod_name) | |
| 64 | { | |
| 65 | return -EINVAL; | |
| 66 | } | |
| 67 | ||
| 68 | static inline void ffa_driver_unregister(struct ffa_driver *driver) {} | |
| 69 | ||
| 70 | static inline | |
| 71 | bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; } | |
| 72 | ||
| 73 | #endif /* CONFIG_ARM_FFA_TRANSPORT */ | |
| 74 | ||
| 75 | #define ffa_register(driver) \ | |
| 76 | ffa_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
| 77 | #define ffa_unregister(driver) \ | |
| 78 | ffa_driver_unregister(driver) | |
| 79 | ||
| 80 | /** | |
| 81 | * module_ffa_driver() - Helper macro for registering a psa_ffa driver | |
| 82 | * @__ffa_driver: ffa_driver structure | |
| 83 | * | |
| 84 | * Helper macro for psa_ffa drivers to set up proper module init / exit | |
| 85 | * functions. Replaces module_init() and module_exit() and keeps people from | |
| 86 | * printing pointless things to the kernel log when their driver is loaded. | |
| 87 | */ | |
| 88 | #define module_ffa_driver(__ffa_driver) \ | |
| 89 | module_driver(__ffa_driver, ffa_register, ffa_unregister) | |
| 90 | ||
| 91 | #endif /* _LINUX_ARM_FFA_H */ |