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_GENERIC 0xffff0000
38 #define TEE_ERROR_BAD_PARAMETERS 0xffff0006
39 #define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008
40 #define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009
41 #define TEE_ERROR_NOT_SUPPORTED 0xffff000a
42 #define TEE_ERROR_COMMUNICATION 0xffff000e
43 #define TEE_ERROR_SECURITY 0xffff000f
44 #define TEE_ERROR_OUT_OF_MEMORY 0xffff000c
45 #define TEE_ERROR_TARGET_DEAD 0xffff3024
47 #define TEE_ORIGIN_COMMS 0x00000002
48 #define TEE_ORIGIN_TEE 0x00000003
49 #define TEE_ORIGIN_TRUSTED_APP 0x00000004
54 * struct tee_optee_ta_uuid - OP-TEE Trusted Application (TA) UUID format
56 * Used to identify an OP-TEE TA and define suitable to initialize structs
57 * of this format is distributed with the interface of the TA. The
58 * individual fields of this struct doesn't have any special meaning in
59 * OP-TEE. See RFC4122 for details on the format.
61 struct tee_optee_ta_uuid {
64 u16 time_hi_and_version;
65 u8 clock_seq_and_node[8];
69 * struct tee_shm - memory shared with the TEE
70 * @dev: The TEE device
71 * @link: List node in the list in struct struct tee_uclass_priv
72 * @addr: Pointer to the shared memory
73 * @size: Size of the the shared memory
74 * @flags: TEE_SHM_* above
78 struct list_head link;
85 * struct tee_param_memref - memory reference for a Trusted Application
86 * @shm_offs: Offset in bytes into the shared memory object @shm
87 * @size: Size in bytes of the memory reference
88 * @shm: Pointer to a shared memory object for the buffer
90 * Used as a part of struct tee_param, see that for more information.
92 struct tee_param_memref {
99 * struct tee_param_value - value parameter for a Trusted Application
100 * @a, @b, @c: Parameters passed by value
102 * Used as a part of struct tee_param, see that for more information.
104 struct tee_param_value {
111 * struct tee_param - invoke parameter for a Trusted Application
113 * @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
114 * TEE_PARAM_ATTR_TYPE_MEMREF_* above
115 * @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
116 * TEE_PARAM_ATTR_TYPE_VALUE_* above
118 * Parameters to TA are passed using an array of this struct, for
119 * flexibility both value parameters and memory refereces can be used.
124 struct tee_param_memref memref;
125 struct tee_param_value value;
130 * struct tee_open_session_arg - extra arguments for tee_open_session()
131 * @uuid: [in] UUID of the Trusted Application
132 * @clnt_uuid: [in] Normally zeroes
133 * @clnt_login: [in] Normally 0
134 * @session: [out] Session id
135 * @ret: [out] return value
136 * @ret_origin: [out] origin of the return value
138 struct tee_open_session_arg {
139 u8 uuid[TEE_UUID_LEN];
140 u8 clnt_uuid[TEE_UUID_LEN];
148 * struct tee_invoke_arg - extra arguments for tee_invoke_func()
149 * @func: [in] Trusted Application function, specific to the TA
150 * @session: [in] Session id, from open session
151 * @ret: [out] return value
152 * @ret_origin: [out] origin of the return value
154 struct tee_invoke_arg {
162 * struct tee_version_data - description of TEE
163 * @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
165 struct tee_version_data {
170 * struct tee_driver_ops - TEE driver operations
171 * @get_version: Query capabilities of TEE device,
172 * @open_session: Opens a session to a Trusted Application in the TEE,
173 * @close_session: Closes a session to Trusted Application,
174 * @invoke_func: Invokes a function in a Trusted Application,
175 * @shm_register: Registers memory shared with the TEE
176 * @shm_unregister: Unregisters memory shared with the TEE
178 struct tee_driver_ops {
180 * get_version() - Query capabilities of TEE device
181 * @dev: The TEE device
182 * @vers: Pointer to version data
184 void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
186 * open_session() - Open a session to a Trusted Application
187 * @dev: The TEE device
188 * @arg: Open session arguments
189 * @num_param: Number of elements in @param
190 * @param: Parameters for Trusted Application
192 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
193 * TEE_SUCCESS the session identifier is available in @arg->session.
195 int (*open_session)(struct udevice *dev,
196 struct tee_open_session_arg *arg, uint num_param,
197 struct tee_param *param);
199 * close_session() - Close a session to a Trusted Application
200 * @dev: The TEE device
201 * @session: Session id
203 * Return < 0 on error else 0, regardless the session will not be valid
204 * after this function has returned.
206 int (*close_session)(struct udevice *dev, u32 session);
208 * tee_invoke_func() - Invoke a function in a Trusted Application
209 * @dev: The TEE device
210 * @arg: Invoke arguments
211 * @num_param: Number of elements in @param
212 * @param: Parameters for Trusted Application
214 * Returns < 0 on error else see @arg->ret for result.
216 int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
217 uint num_param, struct tee_param *param);
219 * shm_register() - Registers memory shared with the TEE
220 * @dev: The TEE device
221 * @shm: Pointer to a shared memory object
222 * Returns 0 on success or < 0 on failure.
224 int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
226 * shm_unregister() - Unregisters memory shared with the TEE
227 * @dev: The TEE device
228 * @shm: Pointer to a shared memory object
229 * Returns 0 on success or < 0 on failure.
231 int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
235 * __tee_shm_add() - Internal helper function to register shared memory
236 * @dev: The TEE device
237 * @align: Required alignment of allocated memory block if
238 * (@flags & TEE_SHM_ALLOC)
239 * @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
240 * @size: Size of memory block
241 * @flags: TEE_SHM_* above
242 * @shmp: If the function return 0, this holds the allocated
245 * returns 0 on success or < 0 on failure.
247 int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
248 u32 flags, struct tee_shm **shmp);
251 * tee_shm_alloc() - Allocate shared memory
252 * @dev: The TEE device
253 * @size: Size of memory block
254 * @flags: TEE_SHM_* above
255 * @shmp: If the function return 0, this holds the allocated
258 * returns 0 on success or < 0 on failure.
260 int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
261 struct tee_shm **shmp);
264 * tee_shm_register() - Registers shared memory
265 * @dev: The TEE device
266 * @addr: Address of memory block
267 * @size: Size of memory block
268 * @flags: TEE_SHM_* above
269 * @shmp: If the function return 0, this holds the allocated
272 * returns 0 on success or < 0 on failure.
274 int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
275 struct tee_shm **shmp);
278 * tee_shm_free() - Frees shared memory
279 * @shm: Shared memory object
281 void tee_shm_free(struct tee_shm *shm);
284 * tee_shm_is_registered() - Check register status of shared memory object
285 * @shm: Pointer to shared memory object
286 * @dev: The TEE device
288 * Returns true if the shared memory object is registered for the supplied
291 bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
294 * tee_find_device() - Look up a TEE device
295 * @start: if not NULL, continue search after this device
296 * @match: function to check TEE device, returns != 0 if the device
298 * @data: data for match function
299 * @vers: if not NULL, version data of TEE device of the device returned
301 * Returns a probed TEE device of the first TEE device matched by the
302 * match() callback or NULL.
304 struct udevice *tee_find_device(struct udevice *start,
305 int (*match)(struct tee_version_data *vers,
308 struct tee_version_data *vers);
311 * tee_get_version() - Query capabilities of TEE device
312 * @dev: The TEE device
313 * @vers: Pointer to version data
315 void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
318 * tee_open_session() - Open a session to a Trusted Application
319 * @dev: The TEE device
320 * @arg: Open session arguments
321 * @num_param: Number of elements in @param
322 * @param: Parameters for Trusted Application
324 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
325 * TEE_SUCCESS the session identifier is available in @arg->session.
327 int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
328 uint num_param, struct tee_param *param);
331 * tee_close_session() - Close a session to a Trusted Application
332 * @dev: The TEE device
333 * @session: Session id
335 * Return < 0 on error else 0, regardless the session will not be valid
336 * after this function has returned.
338 int tee_close_session(struct udevice *dev, u32 session);
341 * tee_invoke_func() - Invoke a function in a Trusted Application
342 * @dev: The TEE device
343 * @arg: Invoke arguments
344 * @num_param: Number of elements in @param
345 * @param: Parameters for Trusted Application
347 * Returns < 0 on error else see @arg->ret for result.
349 int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
350 uint num_param, struct tee_param *param);
353 * tee_optee_ta_uuid_from_octets() - Converts to struct tee_optee_ta_uuid
354 * @d: Destination struct
355 * @s: Source UUID octets
357 * Conversion to a struct tee_optee_ta_uuid represantion from binary octet
360 void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
361 const u8 s[TEE_UUID_LEN]);
364 * tee_optee_ta_uuid_to_octets() - Converts from struct tee_optee_ta_uuid
365 * @d: Destination UUID octets
368 * Conversion from a struct tee_optee_ta_uuid represantion to binary octet
371 void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
372 const struct tee_optee_ta_uuid *s);