1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
3 * Copyright (c) 2015-2021, Linaro Limited
8 #include <linux/bitops.h>
9 #include <linux/types.h>
12 * This file defines the OP-TEE message protocol (ABI) used to communicate
13 * with an instance of OP-TEE running in secure world.
15 * This file is divided into two sections.
16 * 1. Formatting of messages.
17 * 2. Requests from normal world
20 /*****************************************************************************
21 * Part 1 - formatting of messages
22 *****************************************************************************/
24 #define OPTEE_MSG_ATTR_TYPE_NONE 0x0
25 #define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT 0x1
26 #define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT 0x2
27 #define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT 0x3
28 #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5
29 #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6
30 #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7
31 #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9
32 #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa
33 #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb
35 #define OPTEE_MSG_ATTR_TYPE_MASK GENMASK(7, 0)
38 * Meta parameter to be absorbed by the Secure OS and not passed
39 * to the Trusted Application.
41 * Currently only used with OPTEE_MSG_CMD_OPEN_SESSION.
43 #define OPTEE_MSG_ATTR_META BIT(8)
46 * Pointer to a list of pages used to register user-defined SHM buffer.
47 * Used with OPTEE_MSG_ATTR_TYPE_TMEM_*.
48 * buf_ptr should point to the beginning of the buffer. Buffer will contain
49 * list of page addresses. OP-TEE core can reconstruct contiguous buffer from
50 * that page addresses list. Page addresses are stored as 64 bit values.
51 * Last entry on a page should point to the next page of buffer.
52 * Every entry in buffer should point to a 4k page beginning (12 least
53 * significant bits must be equal to zero).
55 * 12 least significant bits of optee_msg_param.u.tmem.buf_ptr should hold
56 * page offset of user buffer.
58 * So, entries should be placed like members of this structure:
61 * uint64_t pages_array[OPTEE_MSG_NONCONTIG_PAGE_SIZE/sizeof(uint64_t) - 1];
62 * uint64_t next_page_data;
65 * Structure is designed to exactly fit into the page size
66 * OPTEE_MSG_NONCONTIG_PAGE_SIZE which is a standard 4KB page.
68 * The size of 4KB is chosen because this is the smallest page size for ARM
69 * architectures. If REE uses larger pages, it should divide them to 4KB ones.
71 #define OPTEE_MSG_ATTR_NONCONTIG BIT(9)
74 * Memory attributes for caching passed with temp memrefs. The actual value
75 * used is defined outside the message protocol with the exception of
76 * OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already
77 * defined for the memory range should be used. If optee_smc.h is used as
78 * bearer of this protocol OPTEE_SMC_SHM_* is used for values.
80 #define OPTEE_MSG_ATTR_CACHE_SHIFT 16
81 #define OPTEE_MSG_ATTR_CACHE_MASK GENMASK(2, 0)
82 #define OPTEE_MSG_ATTR_CACHE_PREDEFINED 0
85 * Same values as TEE_LOGIN_* from TEE Internal API
87 #define OPTEE_MSG_LOGIN_PUBLIC 0x00000000
88 #define OPTEE_MSG_LOGIN_USER 0x00000001
89 #define OPTEE_MSG_LOGIN_GROUP 0x00000002
90 #define OPTEE_MSG_LOGIN_APPLICATION 0x00000004
91 #define OPTEE_MSG_LOGIN_APPLICATION_USER 0x00000005
92 #define OPTEE_MSG_LOGIN_APPLICATION_GROUP 0x00000006
95 * Page size used in non-contiguous buffer entries
97 #define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096
100 * struct optee_msg_param_tmem - temporary memory reference parameter
101 * @buf_ptr: Address of the buffer
102 * @size: Size of the buffer
103 * @shm_ref: Temporary shared memory reference, pointer to a struct tee_shm
105 * Secure and normal world communicates pointers as physical address
106 * instead of the virtual address. This is because secure and normal world
107 * have completely independent memory mapping. Normal world can even have a
108 * hypervisor which need to translate the guest physical address (AKA IPA
109 * in ARM documentation) to a real physical address before passing the
110 * structure to secure world.
112 struct optee_msg_param_tmem {
119 * struct optee_msg_param_rmem - registered memory reference parameter
120 * @offs: Offset into shared memory reference
121 * @size: Size of the buffer
122 * @shm_ref: Shared memory reference, pointer to a struct tee_shm
124 struct optee_msg_param_rmem {
131 * struct optee_msg_param_value - opaque value parameter
133 * Value parameters are passed unchecked between normal and secure world.
135 struct optee_msg_param_value {
142 * struct optee_msg_param - parameter used together with struct optee_msg_arg
144 * @tmem: parameter by temporary memory reference
145 * @rmem: parameter by registered memory reference
146 * @value: parameter by opaque value
147 * @octets: parameter by octet string
149 * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
150 * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets,
151 * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and
152 * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem,
153 * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
155 struct optee_msg_param {
158 struct optee_msg_param_tmem tmem;
159 struct optee_msg_param_rmem rmem;
160 struct optee_msg_param_value value;
166 * struct optee_msg_arg - call argument
167 * @cmd: Command, one of OPTEE_MSG_CMD_* or OPTEE_MSG_RPC_CMD_*
168 * @func: Trusted Application function, specific to the Trusted Application,
169 * used if cmd == OPTEE_MSG_CMD_INVOKE_COMMAND
170 * @session: In parameter for all OPTEE_MSG_CMD_* except
171 * OPTEE_MSG_CMD_OPEN_SESSION where it's an output parameter instead
172 * @cancel_id: Cancellation id, a unique value to identify this request
174 * @ret_origin: origin of the return value
175 * @num_params: number of parameters supplied to the OS Command
176 * @params: the parameters supplied to the OS Command
178 * All normal calls to Trusted OS uses this struct. If cmd requires further
179 * information than what these fields hold it can be passed as a parameter
180 * tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding
181 * attrs field). All parameters tagged as meta have to come first.
183 struct optee_msg_arg {
193 /* num_params tells the actual number of element in params */
194 struct optee_msg_param params[];
198 * OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg
200 * @num_params: Number of parameters embedded in the struct optee_msg_arg
202 * Returns the size of the struct optee_msg_arg together with the number
203 * of embedded parameters.
205 #define OPTEE_MSG_GET_ARG_SIZE(num_params) \
206 (sizeof(struct optee_msg_arg) + \
207 sizeof(struct optee_msg_param) * (num_params))
209 /*****************************************************************************
210 * Part 2 - requests from normal world
211 *****************************************************************************/
214 * Return the following UID if using API specified in this file without
215 * further extensions:
216 * 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
217 * Represented in 4 32-bit words in OPTEE_MSG_UID_0, OPTEE_MSG_UID_1,
218 * OPTEE_MSG_UID_2, OPTEE_MSG_UID_3.
220 #define OPTEE_MSG_UID_0 0x384fb3e0
221 #define OPTEE_MSG_UID_1 0xe7f811e3
222 #define OPTEE_MSG_UID_2 0xaf630002
223 #define OPTEE_MSG_UID_3 0xa5d5c51b
224 #define OPTEE_MSG_FUNCID_CALLS_UID 0xFF01
227 * Returns 2.0 if using API specified in this file without further
228 * extensions. Represented in 2 32-bit words in OPTEE_MSG_REVISION_MAJOR
229 * and OPTEE_MSG_REVISION_MINOR
231 #define OPTEE_MSG_REVISION_MAJOR 2
232 #define OPTEE_MSG_REVISION_MINOR 0
233 #define OPTEE_MSG_FUNCID_CALLS_REVISION 0xFF03
236 * Get UUID of Trusted OS.
238 * Used by non-secure world to figure out which Trusted OS is installed.
239 * Note that returned UUID is the UUID of the Trusted OS, not of the API.
241 * Returns UUID in 4 32-bit words in the same way as
242 * OPTEE_MSG_FUNCID_CALLS_UID described above.
244 #define OPTEE_MSG_OS_OPTEE_UUID_0 0x486178e0
245 #define OPTEE_MSG_OS_OPTEE_UUID_1 0xe7f811e3
246 #define OPTEE_MSG_OS_OPTEE_UUID_2 0xbc5e0002
247 #define OPTEE_MSG_OS_OPTEE_UUID_3 0xa5d5c51b
248 #define OPTEE_MSG_FUNCID_GET_OS_UUID 0x0000
251 * Get revision of Trusted OS.
253 * Used by non-secure world to figure out which version of the Trusted OS
254 * is installed. Note that the returned revision is the revision of the
255 * Trusted OS, not of the API.
257 * Returns revision in 2 32-bit words in the same way as
258 * OPTEE_MSG_CALLS_REVISION described above.
260 #define OPTEE_MSG_FUNCID_GET_OS_REVISION 0x0001
263 * Do a secure call with struct optee_msg_arg as argument
264 * The OPTEE_MSG_CMD_* below defines what goes in struct optee_msg_arg::cmd
266 * OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application.
267 * The first two parameters are tagged as meta, holding two value
268 * parameters to pass the following information:
269 * param[0].u.value.a-b uuid of Trusted Application
270 * param[1].u.value.a-b uuid of Client
271 * param[1].u.value.c Login class of client OPTEE_MSG_LOGIN_*
273 * OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened
274 * session to a Trusted Application. struct optee_msg_arg::func is Trusted
275 * Application function, specific to the Trusted Application.
277 * OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to
278 * Trusted Application.
280 * OPTEE_MSG_CMD_CANCEL cancels a currently invoked command.
282 * OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The
283 * information is passed as:
284 * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
285 * [| OPTEE_MSG_ATTR_NONCONTIG]
286 * [in] param[0].u.tmem.buf_ptr physical address (of first fragment)
287 * [in] param[0].u.tmem.size size (of first fragment)
288 * [in] param[0].u.tmem.shm_ref holds shared memory reference
290 * OPTEE_MSG_CMD_UNREGISTER_SHM unregisters a previously registered shared
291 * memory reference. The information is passed as:
292 * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
293 * [in] param[0].u.rmem.shm_ref holds shared memory reference
294 * [in] param[0].u.rmem.offs 0
295 * [in] param[0].u.rmem.size 0
297 #define OPTEE_MSG_CMD_OPEN_SESSION 0
298 #define OPTEE_MSG_CMD_INVOKE_COMMAND 1
299 #define OPTEE_MSG_CMD_CLOSE_SESSION 2
300 #define OPTEE_MSG_CMD_CANCEL 3
301 #define OPTEE_MSG_CMD_REGISTER_SHM 4
302 #define OPTEE_MSG_CMD_UNREGISTER_SHM 5
303 #define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0x0004
305 #endif /* _OPTEE_MSG_H */