1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2018 Linaro Limited
9 #define TEE_UUID_LEN 16
11 #define TEE_GEN_CAP_GP BIT(0) /* GlobalPlatform compliant TEE */
12 #define TEE_GEN_CAP_REG_MEM BIT(1) /* Supports registering shared memory */
14 #define TEE_SHM_REGISTER BIT(0) /* In list of shared memory */
15 #define TEE_SHM_SEC_REGISTER BIT(1) /* TEE notified of this memory */
16 #define TEE_SHM_ALLOC BIT(2) /* The memory is malloced() and must */
19 #define TEE_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
20 #define TEE_PARAM_ATTR_TYPE_VALUE_INPUT 1
21 #define TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
22 #define TEE_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
23 #define TEE_PARAM_ATTR_TYPE_MEMREF_INPUT 5
24 #define TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
25 #define TEE_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
26 #define TEE_PARAM_ATTR_TYPE_MASK 0xff
27 #define TEE_PARAM_ATTR_META 0x100
28 #define TEE_PARAM_ATTR_MASK (TEE_PARAM_ATTR_TYPE_MASK | \
32 * Some Global Platform error codes which has a meaning if the
33 * TEE_GEN_CAP_GP bit is returned by the driver in
34 * struct tee_version_data::gen_caps
36 #define TEE_SUCCESS 0x00000000
37 #define TEE_ERROR_STORAGE_NOT_AVAILABLE 0xf0100003
38 #define TEE_ERROR_GENERIC 0xffff0000
39 #define TEE_ERROR_BAD_PARAMETERS 0xffff0006
40 #define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008
41 #define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009
42 #define TEE_ERROR_NOT_SUPPORTED 0xffff000a
43 #define TEE_ERROR_COMMUNICATION 0xffff000e
44 #define TEE_ERROR_SECURITY 0xffff000f
45 #define TEE_ERROR_OUT_OF_MEMORY 0xffff000c
46 #define TEE_ERROR_OVERFLOW 0xffff300f
47 #define TEE_ERROR_TARGET_DEAD 0xffff3024
48 #define TEE_ERROR_STORAGE_NO_SPACE 0xffff3041
50 #define TEE_ORIGIN_COMMS 0x00000002
51 #define TEE_ORIGIN_TEE 0x00000003
52 #define TEE_ORIGIN_TRUSTED_APP 0x00000004
57 * struct tee_optee_ta_uuid - OP-TEE Trusted Application (TA) UUID format
59 * Used to identify an OP-TEE TA and define suitable to initialize structs
60 * of this format is distributed with the interface of the TA. The
61 * individual fields of this struct doesn't have any special meaning in
62 * OP-TEE. See RFC4122 for details on the format.
64 struct tee_optee_ta_uuid {
67 u16 time_hi_and_version;
68 u8 clock_seq_and_node[8];
72 * struct tee_shm - memory shared with the TEE
73 * @dev: The TEE device
74 * @link: List node in the list in struct struct tee_uclass_priv
75 * @addr: Pointer to the shared memory
76 * @size: Size of the the shared memory
77 * @flags: TEE_SHM_* above
81 struct list_head link;
88 * struct tee_param_memref - memory reference for a Trusted Application
89 * @shm_offs: Offset in bytes into the shared memory object @shm
90 * @size: Size in bytes of the memory reference
91 * @shm: Pointer to a shared memory object for the buffer
93 * Used as a part of struct tee_param, see that for more information.
95 struct tee_param_memref {
102 * struct tee_param_value - value parameter for a Trusted Application
103 * @a, @b, @c: Parameters passed by value
105 * Used as a part of struct tee_param, see that for more information.
107 struct tee_param_value {
114 * struct tee_param - invoke parameter for a Trusted Application
116 * @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
117 * TEE_PARAM_ATTR_TYPE_MEMREF_* above
118 * @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
119 * TEE_PARAM_ATTR_TYPE_VALUE_* above
121 * Parameters to TA are passed using an array of this struct, for
122 * flexibility both value parameters and memory refereces can be used.
127 struct tee_param_memref memref;
128 struct tee_param_value value;
133 * struct tee_open_session_arg - extra arguments for tee_open_session()
134 * @uuid: [in] UUID of the Trusted Application
135 * @clnt_uuid: [in] Normally zeroes
136 * @clnt_login: [in] Normally 0
137 * @session: [out] Session id
138 * @ret: [out] return value
139 * @ret_origin: [out] origin of the return value
141 struct tee_open_session_arg {
142 u8 uuid[TEE_UUID_LEN];
143 u8 clnt_uuid[TEE_UUID_LEN];
151 * struct tee_invoke_arg - extra arguments for tee_invoke_func()
152 * @func: [in] Trusted Application function, specific to the TA
153 * @session: [in] Session id, from open session
154 * @ret: [out] return value
155 * @ret_origin: [out] origin of the return value
157 struct tee_invoke_arg {
165 * struct tee_version_data - description of TEE
166 * @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
168 struct tee_version_data {
173 * struct tee_driver_ops - TEE driver operations
174 * @get_version: Query capabilities of TEE device,
175 * @open_session: Opens a session to a Trusted Application in the TEE,
176 * @close_session: Closes a session to Trusted Application,
177 * @invoke_func: Invokes a function in a Trusted Application,
178 * @shm_register: Registers memory shared with the TEE
179 * @shm_unregister: Unregisters memory shared with the TEE
181 struct tee_driver_ops {
183 * get_version() - Query capabilities of TEE device
184 * @dev: The TEE device
185 * @vers: Pointer to version data
187 void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
189 * open_session() - Open a session to a Trusted Application
190 * @dev: The TEE device
191 * @arg: Open session arguments
192 * @num_param: Number of elements in @param
193 * @param: Parameters for Trusted Application
195 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
196 * TEE_SUCCESS the session identifier is available in @arg->session.
198 int (*open_session)(struct udevice *dev,
199 struct tee_open_session_arg *arg, uint num_param,
200 struct tee_param *param);
202 * close_session() - Close a session to a Trusted Application
203 * @dev: The TEE device
204 * @session: Session id
206 * Return < 0 on error else 0, regardless the session will not be valid
207 * after this function has returned.
209 int (*close_session)(struct udevice *dev, u32 session);
211 * tee_invoke_func() - Invoke a function in a Trusted Application
212 * @dev: The TEE device
213 * @arg: Invoke arguments
214 * @num_param: Number of elements in @param
215 * @param: Parameters for Trusted Application
217 * Returns < 0 on error else see @arg->ret for result.
219 int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
220 uint num_param, struct tee_param *param);
222 * shm_register() - Registers memory shared with the TEE
223 * @dev: The TEE device
224 * @shm: Pointer to a shared memory object
225 * Returns 0 on success or < 0 on failure.
227 int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
229 * shm_unregister() - Unregisters memory shared with the TEE
230 * @dev: The TEE device
231 * @shm: Pointer to a shared memory object
232 * Returns 0 on success or < 0 on failure.
234 int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
238 * __tee_shm_add() - Internal helper function to register shared memory
239 * @dev: The TEE device
240 * @align: Required alignment of allocated memory block if
241 * (@flags & TEE_SHM_ALLOC)
242 * @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
243 * @size: Size of memory block
244 * @flags: TEE_SHM_* above
245 * @shmp: If the function return 0, this holds the allocated
248 * returns 0 on success or < 0 on failure.
250 int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
251 u32 flags, struct tee_shm **shmp);
254 * tee_shm_alloc() - Allocate shared memory
255 * @dev: The TEE device
256 * @size: Size of memory block
257 * @flags: TEE_SHM_* above
258 * @shmp: If the function return 0, this holds the allocated
261 * returns 0 on success or < 0 on failure.
263 int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
264 struct tee_shm **shmp);
267 * tee_shm_register() - Registers shared memory
268 * @dev: The TEE device
269 * @addr: Address of memory block
270 * @size: Size of memory block
271 * @flags: TEE_SHM_* above
272 * @shmp: If the function return 0, this holds the allocated
275 * returns 0 on success or < 0 on failure.
277 int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
278 struct tee_shm **shmp);
281 * tee_shm_free() - Frees shared memory
282 * @shm: Shared memory object
284 void tee_shm_free(struct tee_shm *shm);
287 * tee_shm_is_registered() - Check register status of shared memory object
288 * @shm: Pointer to shared memory object
289 * @dev: The TEE device
291 * Returns true if the shared memory object is registered for the supplied
294 bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
297 * tee_find_device() - Look up a TEE device
298 * @start: if not NULL, continue search after this device
299 * @match: function to check TEE device, returns != 0 if the device
301 * @data: data for match function
302 * @vers: if not NULL, version data of TEE device of the device returned
304 * Returns a probed TEE device of the first TEE device matched by the
305 * match() callback or NULL.
307 struct udevice *tee_find_device(struct udevice *start,
308 int (*match)(struct tee_version_data *vers,
311 struct tee_version_data *vers);
314 * tee_get_version() - Query capabilities of TEE device
315 * @dev: The TEE device
316 * @vers: Pointer to version data
318 void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
321 * tee_open_session() - Open a session to a Trusted Application
322 * @dev: The TEE device
323 * @arg: Open session arguments
324 * @num_param: Number of elements in @param
325 * @param: Parameters for Trusted Application
327 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
328 * TEE_SUCCESS the session identifier is available in @arg->session.
330 int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
331 uint num_param, struct tee_param *param);
334 * tee_close_session() - Close a session to a Trusted Application
335 * @dev: The TEE device
336 * @session: Session id
338 * Return < 0 on error else 0, regardless the session will not be valid
339 * after this function has returned.
341 int tee_close_session(struct udevice *dev, u32 session);
344 * tee_invoke_func() - Invoke a function in a Trusted Application
345 * @dev: The TEE device
346 * @arg: Invoke arguments
347 * @num_param: Number of elements in @param
348 * @param: Parameters for Trusted Application
350 * Returns < 0 on error else see @arg->ret for result.
352 int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
353 uint num_param, struct tee_param *param);
356 * tee_optee_ta_uuid_from_octets() - Converts to struct tee_optee_ta_uuid
357 * @d: Destination struct
358 * @s: Source UUID octets
360 * Conversion to a struct tee_optee_ta_uuid represantion from binary octet
363 void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
364 const u8 s[TEE_UUID_LEN]);
367 * tee_optee_ta_uuid_to_octets() - Converts from struct tee_optee_ta_uuid
368 * @d: Destination UUID octets
371 * Conversion from a struct tee_optee_ta_uuid represantion to binary octet
374 void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
375 const struct tee_optee_ta_uuid *s);