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
53 * struct tee_shm - memory shared with the TEE
54 * @dev: The TEE device
55 * @link: List node in the list in struct struct tee_uclass_priv
56 * @addr: Pointer to the shared memory
57 * @size: Size of the the shared memory
58 * @flags: TEE_SHM_* above
62 struct list_head link;
69 * struct tee_param_memref - memory reference for a Trusted Application
70 * @shm_offs: Offset in bytes into the shared memory object @shm
71 * @size: Size in bytes of the memory reference
72 * @shm: Pointer to a shared memory object for the buffer
74 * Used as a part of struct tee_param, see that for more information.
76 struct tee_param_memref {
83 * struct tee_param_value - value parameter for a Trusted Application
84 * @a, @b, @c: Parameters passed by value
86 * Used as a part of struct tee_param, see that for more information.
88 struct tee_param_value {
95 * struct tee_param - invoke parameter for a Trusted Application
97 * @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
98 * TEE_PARAM_ATTR_TYPE_MEMREF_* above
99 * @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
100 * TEE_PARAM_ATTR_TYPE_VALUE_* above
102 * Parameters to TA are passed using an array of this struct, for
103 * flexibility both value parameters and memory refereces can be used.
108 struct tee_param_memref memref;
109 struct tee_param_value value;
114 * struct tee_open_session_arg - extra arguments for tee_open_session()
115 * @uuid: [in] UUID of the Trusted Application
116 * @clnt_uuid: [in] Normally zeroes
117 * @clnt_login: [in] Normally 0
118 * @session: [out] Session id
119 * @ret: [out] return value
120 * @ret_origin: [out] origin of the return value
122 struct tee_open_session_arg {
123 u8 uuid[TEE_UUID_LEN];
124 u8 clnt_uuid[TEE_UUID_LEN];
132 * struct tee_invoke_arg - extra arguments for tee_invoke_func()
133 * @func: [in] Trusted Application function, specific to the TA
134 * @session: [in] Session id, from open session
135 * @ret: [out] return value
136 * @ret_origin: [out] origin of the return value
138 struct tee_invoke_arg {
146 * struct tee_version_data - description of TEE
147 * @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
149 struct tee_version_data {
154 * struct tee_driver_ops - TEE driver operations
155 * @get_version: Query capabilities of TEE device,
156 * @open_session: Opens a session to a Trusted Application in the TEE,
157 * @close_session: Closes a session to Trusted Application,
158 * @invoke_func: Invokes a function in a Trusted Application,
159 * @shm_register: Registers memory shared with the TEE
160 * @shm_unregister: Unregisters memory shared with the TEE
162 struct tee_driver_ops {
164 * get_version() - Query capabilities of TEE device
165 * @dev: The TEE device
166 * @vers: Pointer to version data
168 void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
170 * open_session() - Open a session to a Trusted Application
171 * @dev: The TEE device
172 * @arg: Open session arguments
173 * @num_param: Number of elements in @param
174 * @param: Parameters for Trusted Application
176 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
177 * TEE_SUCCESS the session identifier is available in @arg->session.
179 int (*open_session)(struct udevice *dev,
180 struct tee_open_session_arg *arg, uint num_param,
181 struct tee_param *param);
183 * close_session() - Close a session to a Trusted Application
184 * @dev: The TEE device
185 * @session: Session id
187 * Return < 0 on error else 0, regardless the session will not be valid
188 * after this function has returned.
190 int (*close_session)(struct udevice *dev, u32 session);
192 * tee_invoke_func() - Invoke a function in a Trusted Application
193 * @dev: The TEE device
194 * @arg: Invoke arguments
195 * @num_param: Number of elements in @param
196 * @param: Parameters for Trusted Application
198 * Returns < 0 on error else see @arg->ret for result.
200 int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
201 uint num_param, struct tee_param *param);
203 * shm_register() - Registers memory shared with the TEE
204 * @dev: The TEE device
205 * @shm: Pointer to a shared memory object
206 * Returns 0 on success or < 0 on failure.
208 int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
210 * shm_unregister() - Unregisters memory shared with the TEE
211 * @dev: The TEE device
212 * @shm: Pointer to a shared memory object
213 * Returns 0 on success or < 0 on failure.
215 int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
219 * __tee_shm_add() - Internal helper function to register shared memory
220 * @dev: The TEE device
221 * @align: Required alignment of allocated memory block if
222 * (@flags & TEE_SHM_ALLOC)
223 * @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
224 * @size: Size of memory block
225 * @flags: TEE_SHM_* above
226 * @shmp: If the function return 0, this holds the allocated
229 * returns 0 on success or < 0 on failure.
231 int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
232 u32 flags, struct tee_shm **shmp);
235 * tee_shm_alloc() - Allocate shared memory
236 * @dev: The TEE device
237 * @size: Size of memory block
238 * @flags: TEE_SHM_* above
239 * @shmp: If the function return 0, this holds the allocated
242 * returns 0 on success or < 0 on failure.
244 int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
245 struct tee_shm **shmp);
248 * tee_shm_register() - Registers shared memory
249 * @dev: The TEE device
250 * @addr: Address of memory block
251 * @size: Size of memory block
252 * @flags: TEE_SHM_* above
253 * @shmp: If the function return 0, this holds the allocated
256 * returns 0 on success or < 0 on failure.
258 int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
259 struct tee_shm **shmp);
262 * tee_shm_free() - Frees shared memory
263 * @shm: Shared memory object
265 void tee_shm_free(struct tee_shm *shm);
268 * tee_shm_is_registered() - Check register status of shared memory object
269 * @shm: Pointer to shared memory object
270 * @dev: The TEE device
272 * Returns true if the shared memory object is registered for the supplied
275 bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
278 * tee_find_device() - Look up a TEE device
279 * @start: if not NULL, continue search after this device
280 * @match: function to check TEE device, returns != 0 if the device
282 * @data: data for match function
283 * @vers: if not NULL, version data of TEE device of the device returned
285 * Returns a probed TEE device of the first TEE device matched by the
286 * match() callback or NULL.
288 struct udevice *tee_find_device(struct udevice *start,
289 int (*match)(struct tee_version_data *vers,
292 struct tee_version_data *vers);
295 * tee_get_version() - Query capabilities of TEE device
296 * @dev: The TEE device
297 * @vers: Pointer to version data
299 void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
302 * tee_open_session() - Open a session to a Trusted Application
303 * @dev: The TEE device
304 * @arg: Open session arguments
305 * @num_param: Number of elements in @param
306 * @param: Parameters for Trusted Application
308 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
309 * TEE_SUCCESS the session identifier is available in @arg->session.
311 int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
312 uint num_param, struct tee_param *param);
315 * tee_close_session() - Close a session to a Trusted Application
316 * @dev: The TEE device
317 * @session: Session id
319 * Return < 0 on error else 0, regardless the session will not be valid
320 * after this function has returned.
322 int tee_close_session(struct udevice *dev, u32 session);
325 * tee_invoke_func() - Invoke a function in a Trusted Application
326 * @dev: The TEE device
327 * @arg: Invoke arguments
328 * @num_param: Number of elements in @param
329 * @param: Parameters for Trusted Application
331 * Returns < 0 on error else see @arg->ret for result.
333 int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
334 uint num_param, struct tee_param *param);