1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2018 Linaro Limited
9 #include <linux/bitops.h>
10 #include <linux/list.h>
12 #define TEE_UUID_LEN 16
14 #define TEE_GEN_CAP_GP BIT(0) /* GlobalPlatform compliant TEE */
15 #define TEE_GEN_CAP_REG_MEM BIT(1) /* Supports registering shared memory */
17 #define TEE_SHM_REGISTER BIT(0) /* In list of shared memory */
18 #define TEE_SHM_SEC_REGISTER BIT(1) /* TEE notified of this memory */
19 #define TEE_SHM_ALLOC BIT(2) /* The memory is malloced() and must */
22 #define TEE_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
23 #define TEE_PARAM_ATTR_TYPE_VALUE_INPUT 1
24 #define TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
25 #define TEE_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
26 #define TEE_PARAM_ATTR_TYPE_MEMREF_INPUT 5
27 #define TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
28 #define TEE_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
29 #define TEE_PARAM_ATTR_TYPE_MASK 0xff
30 #define TEE_PARAM_ATTR_META 0x100
31 #define TEE_PARAM_ATTR_MASK (TEE_PARAM_ATTR_TYPE_MASK | \
35 * Some Global Platform error codes which has a meaning if the
36 * TEE_GEN_CAP_GP bit is returned by the driver in
37 * struct tee_version_data::gen_caps
39 #define TEE_SUCCESS 0x00000000
40 #define TEE_ERROR_STORAGE_NOT_AVAILABLE 0xf0100003
41 #define TEE_ERROR_GENERIC 0xffff0000
42 #define TEE_ERROR_EXCESS_DATA 0xffff0004
43 #define TEE_ERROR_BAD_PARAMETERS 0xffff0006
44 #define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008
45 #define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009
46 #define TEE_ERROR_NOT_SUPPORTED 0xffff000a
47 #define TEE_ERROR_COMMUNICATION 0xffff000e
48 #define TEE_ERROR_SECURITY 0xffff000f
49 #define TEE_ERROR_OUT_OF_MEMORY 0xffff000c
50 #define TEE_ERROR_OVERFLOW 0xffff300f
51 #define TEE_ERROR_TARGET_DEAD 0xffff3024
52 #define TEE_ERROR_STORAGE_NO_SPACE 0xffff3041
54 #define TEE_ORIGIN_COMMS 0x00000002
55 #define TEE_ORIGIN_TEE 0x00000003
56 #define TEE_ORIGIN_TRUSTED_APP 0x00000004
61 * struct tee_optee_ta_uuid - OP-TEE Trusted Application (TA) UUID format
63 * Used to identify an OP-TEE TA and define suitable to initialize structs
64 * of this format is distributed with the interface of the TA. The
65 * individual fields of this struct doesn't have any special meaning in
66 * OP-TEE. See RFC4122 for details on the format.
68 struct tee_optee_ta_uuid {
71 u16 time_hi_and_version;
72 u8 clock_seq_and_node[8];
76 * struct tee_shm - memory shared with the TEE
77 * @dev: The TEE device
78 * @link: List node in the list in struct struct tee_uclass_priv
79 * @addr: Pointer to the shared memory
80 * @size: Size of the the shared memory
81 * @flags: TEE_SHM_* above
85 struct list_head link;
92 * struct tee_param_memref - memory reference for a Trusted Application
93 * @shm_offs: Offset in bytes into the shared memory object @shm
94 * @size: Size in bytes of the memory reference
95 * @shm: Pointer to a shared memory object for the buffer
97 * Used as a part of struct tee_param, see that for more information.
99 struct tee_param_memref {
106 * struct tee_param_value - value parameter for a Trusted Application
107 * @a, @b, @c: Parameters passed by value
109 * Used as a part of struct tee_param, see that for more information.
111 struct tee_param_value {
118 * struct tee_param - invoke parameter for a Trusted Application
120 * @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
121 * TEE_PARAM_ATTR_TYPE_MEMREF_* above
122 * @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
123 * TEE_PARAM_ATTR_TYPE_VALUE_* above
125 * Parameters to TA are passed using an array of this struct, for
126 * flexibility both value parameters and memory refereces can be used.
131 struct tee_param_memref memref;
132 struct tee_param_value value;
137 * struct tee_open_session_arg - extra arguments for tee_open_session()
138 * @uuid: [in] UUID of the Trusted Application
139 * @clnt_uuid: [in] Normally zeroes
140 * @clnt_login: [in] Normally 0
141 * @session: [out] Session id
142 * @ret: [out] return value
143 * @ret_origin: [out] origin of the return value
145 struct tee_open_session_arg {
146 u8 uuid[TEE_UUID_LEN];
147 u8 clnt_uuid[TEE_UUID_LEN];
155 * struct tee_invoke_arg - extra arguments for tee_invoke_func()
156 * @func: [in] Trusted Application function, specific to the TA
157 * @session: [in] Session id, from open session
158 * @ret: [out] return value
159 * @ret_origin: [out] origin of the return value
161 struct tee_invoke_arg {
169 * struct tee_version_data - description of TEE
170 * @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
172 struct tee_version_data {
177 * struct tee_driver_ops - TEE driver operations
178 * @get_version: Query capabilities of TEE device,
179 * @open_session: Opens a session to a Trusted Application in the TEE,
180 * @close_session: Closes a session to Trusted Application,
181 * @invoke_func: Invokes a function in a Trusted Application,
182 * @shm_register: Registers memory shared with the TEE
183 * @shm_unregister: Unregisters memory shared with the TEE
185 struct tee_driver_ops {
187 * get_version() - Query capabilities of TEE device
188 * @dev: The TEE device
189 * @vers: Pointer to version data
191 void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
193 * open_session() - Open a session to a Trusted Application
194 * @dev: The TEE device
195 * @arg: Open session arguments
196 * @num_param: Number of elements in @param
197 * @param: Parameters for Trusted Application
199 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
200 * TEE_SUCCESS the session identifier is available in @arg->session.
202 int (*open_session)(struct udevice *dev,
203 struct tee_open_session_arg *arg, uint num_param,
204 struct tee_param *param);
206 * close_session() - Close a session to a Trusted Application
207 * @dev: The TEE device
208 * @session: Session id
210 * Return < 0 on error else 0, regardless the session will not be valid
211 * after this function has returned.
213 int (*close_session)(struct udevice *dev, u32 session);
215 * tee_invoke_func() - Invoke a function in a Trusted Application
216 * @dev: The TEE device
217 * @arg: Invoke arguments
218 * @num_param: Number of elements in @param
219 * @param: Parameters for Trusted Application
221 * Returns < 0 on error else see @arg->ret for result.
223 int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
224 uint num_param, struct tee_param *param);
226 * shm_register() - Registers 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_register)(struct udevice *dev, struct tee_shm *shm);
233 * shm_unregister() - Unregisters memory shared with the TEE
234 * @dev: The TEE device
235 * @shm: Pointer to a shared memory object
236 * Returns 0 on success or < 0 on failure.
238 int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
242 * __tee_shm_add() - Internal helper function to register shared memory
243 * @dev: The TEE device
244 * @align: Required alignment of allocated memory block if
245 * (@flags & TEE_SHM_ALLOC)
246 * @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
247 * @size: Size of memory block
248 * @flags: TEE_SHM_* above
249 * @shmp: If the function return 0, this holds the allocated
252 * returns 0 on success or < 0 on failure.
254 int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
255 u32 flags, struct tee_shm **shmp);
258 * tee_shm_alloc() - Allocate shared memory
259 * @dev: The TEE device
260 * @size: Size of memory block
261 * @flags: TEE_SHM_* above
262 * @shmp: If the function return 0, this holds the allocated
265 * returns 0 on success or < 0 on failure.
267 int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
268 struct tee_shm **shmp);
271 * tee_shm_register() - Registers shared memory
272 * @dev: The TEE device
273 * @addr: Address of memory block
274 * @size: Size of memory block
275 * @flags: TEE_SHM_* above
276 * @shmp: If the function return 0, this holds the allocated
279 * returns 0 on success or < 0 on failure.
281 int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
282 struct tee_shm **shmp);
285 * tee_shm_free() - Frees shared memory
286 * @shm: Shared memory object
288 void tee_shm_free(struct tee_shm *shm);
291 * tee_shm_is_registered() - Check register status of shared memory object
292 * @shm: Pointer to shared memory object
293 * @dev: The TEE device
295 * Returns true if the shared memory object is registered for the supplied
298 bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
301 * tee_find_device() - Look up a TEE device
302 * @start: if not NULL, continue search after this device
303 * @match: function to check TEE device, returns != 0 if the device
305 * @data: data for match function
306 * @vers: if not NULL, version data of TEE device of the device returned
308 * Returns a probed TEE device of the first TEE device matched by the
309 * match() callback or NULL.
311 #if CONFIG_IS_ENABLED(TEE)
312 struct udevice *tee_find_device(struct udevice *start,
313 int (*match)(struct tee_version_data *vers,
316 struct tee_version_data *vers);
318 static inline struct udevice *tee_find_device(struct udevice *start,
319 int (*match)(struct tee_version_data *vers,
322 struct tee_version_data *vers)
329 * tee_get_version() - Query capabilities of TEE device
330 * @dev: The TEE device
331 * @vers: Pointer to version data
333 void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
336 * tee_open_session() - Open a session to a Trusted Application
337 * @dev: The TEE device
338 * @arg: Open session arguments
339 * @num_param: Number of elements in @param
340 * @param: Parameters for Trusted Application
342 * Returns < 0 on error else see @arg->ret for result. If @arg->ret is
343 * TEE_SUCCESS the session identifier is available in @arg->session.
345 int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
346 uint num_param, struct tee_param *param);
349 * tee_close_session() - Close a session to a Trusted Application
350 * @dev: The TEE device
351 * @session: Session id
353 * Return < 0 on error else 0, regardless the session will not be valid
354 * after this function has returned.
356 int tee_close_session(struct udevice *dev, u32 session);
359 * tee_invoke_func() - Invoke a function in a Trusted Application
360 * @dev: The TEE device
361 * @arg: Invoke arguments
362 * @num_param: Number of elements in @param
363 * @param: Parameters for Trusted Application
365 * Returns < 0 on error else see @arg->ret for result.
367 int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
368 uint num_param, struct tee_param *param);
371 * tee_optee_ta_uuid_from_octets() - Converts to struct tee_optee_ta_uuid
372 * @d: Destination struct
373 * @s: Source UUID octets
375 * Conversion to a struct tee_optee_ta_uuid represantion from binary octet
378 void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
379 const u8 s[TEE_UUID_LEN]);
382 * tee_optee_ta_uuid_to_octets() - Converts from struct tee_optee_ta_uuid
383 * @d: Destination UUID octets
386 * Conversion from a struct tee_optee_ta_uuid represantion to binary octet
389 void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
390 const struct tee_optee_ta_uuid *s);
393 * tee_flush_all_shm_dcache() - Flush data cache for all shared memories
394 * @dev: The TEE device
396 void tee_flush_all_shm_dcache(struct udevice *dev);