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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 | ||
e7818584 SH |
9 | #include <linux/device.h> |
10 | #include <linux/module.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/uuid.h> | |
13 | ||
14 | /* FFA Bus/Device/Driver related */ | |
15 | struct ffa_device { | |
16 | int vm_id; | |
d0c0bce8 | 17 | bool mode_32bit; |
e7818584 SH |
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); | |
d0c0bce8 | 51 | const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev); |
e7818584 SH |
52 | |
53 | #else | |
54 | static inline | |
55 | struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id) | |
56 | { | |
57 | return NULL; | |
58 | } | |
59 | ||
60 | static inline void ffa_device_unregister(struct ffa_device *dev) {} | |
61 | ||
62 | static inline int | |
63 | ffa_driver_register(struct ffa_driver *driver, struct module *owner, | |
64 | const char *mod_name) | |
65 | { | |
66 | return -EINVAL; | |
67 | } | |
68 | ||
69 | static inline void ffa_driver_unregister(struct ffa_driver *driver) {} | |
70 | ||
71 | static inline | |
72 | bool ffa_device_is_valid(struct ffa_device *ffa_dev) { return false; } | |
73 | ||
d0c0bce8 SH |
74 | static inline |
75 | const struct ffa_dev_ops *ffa_dev_ops_get(struct ffa_device *dev) | |
76 | { | |
77 | return NULL; | |
78 | } | |
e7818584 SH |
79 | #endif /* CONFIG_ARM_FFA_TRANSPORT */ |
80 | ||
81 | #define ffa_register(driver) \ | |
82 | ffa_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) | |
83 | #define ffa_unregister(driver) \ | |
84 | ffa_driver_unregister(driver) | |
85 | ||
86 | /** | |
87 | * module_ffa_driver() - Helper macro for registering a psa_ffa driver | |
88 | * @__ffa_driver: ffa_driver structure | |
89 | * | |
90 | * Helper macro for psa_ffa drivers to set up proper module init / exit | |
91 | * functions. Replaces module_init() and module_exit() and keeps people from | |
92 | * printing pointless things to the kernel log when their driver is loaded. | |
93 | */ | |
94 | #define module_ffa_driver(__ffa_driver) \ | |
95 | module_driver(__ffa_driver, ffa_register, ffa_unregister) | |
96 | ||
d0c0bce8 SH |
97 | /* FFA transport related */ |
98 | struct ffa_partition_info { | |
99 | u16 id; | |
100 | u16 exec_ctxt; | |
101 | /* partition supports receipt of direct requests */ | |
102 | #define FFA_PARTITION_DIRECT_RECV BIT(0) | |
103 | /* partition can send direct requests. */ | |
104 | #define FFA_PARTITION_DIRECT_SEND BIT(1) | |
105 | /* partition can send and receive indirect messages. */ | |
106 | #define FFA_PARTITION_INDIRECT_MSG BIT(2) | |
107 | u32 properties; | |
108 | }; | |
109 | ||
110 | /* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */ | |
111 | struct ffa_send_direct_data { | |
112 | unsigned long data0; /* w3/x3 */ | |
113 | unsigned long data1; /* w4/x4 */ | |
114 | unsigned long data2; /* w5/x5 */ | |
115 | unsigned long data3; /* w6/x6 */ | |
116 | unsigned long data4; /* w7/x7 */ | |
117 | }; | |
118 | ||
119 | struct ffa_dev_ops { | |
120 | u32 (*api_version_get)(void); | |
121 | int (*partition_info_get)(const char *uuid_str, | |
122 | struct ffa_partition_info *buffer); | |
123 | void (*mode_32bit_set)(struct ffa_device *dev); | |
124 | int (*sync_send_receive)(struct ffa_device *dev, | |
125 | struct ffa_send_direct_data *data); | |
126 | }; | |
127 | ||
e7818584 | 128 | #endif /* _LINUX_ARM_FFA_H */ |