1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2015-2020, Linaro Limited 4 */ 5 #ifndef __OPTEE_MSG_H 6 #define __OPTEE_MSG_H 7 8 #include <compiler.h> 9 #include <types_ext.h> 10 #include <util.h> 11 12 /* 13 * This file defines the OP-TEE message protocol (ABI) used to communicate 14 * with an instance of OP-TEE running in secure world. 15 * 16 * This file is divided into two sections. 17 * 1. Formatting of messages. 18 * 2. Requests from normal world 19 */ 20 21 /***************************************************************************** 22 * Part 1 - formatting of messages 23 *****************************************************************************/ 24 25 #define OPTEE_MSG_ATTR_TYPE_NONE U(0x0) 26 #define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT U(0x1) 27 #define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT U(0x2) 28 #define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT U(0x3) 29 #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT U(0x5) 30 #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT U(0x6) 31 #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT U(0x7) 32 #define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 33 #define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 34 #define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 35 #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT U(0x9) 36 #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT U(0xa) 37 #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT U(0xb) 38 39 #define OPTEE_MSG_ATTR_TYPE_MASK GENMASK_32(7, 0) 40 41 /* 42 * Meta parameter to be absorbed by the Secure OS and not passed 43 * to the Trusted Application. 44 * 45 * Currently only used with OPTEE_MSG_CMD_OPEN_SESSION. 46 */ 47 #define OPTEE_MSG_ATTR_META BIT(8) 48 49 /* 50 * Pointer to a list of pages used to register user-defined SHM buffer. 51 * Used with OPTEE_MSG_ATTR_TYPE_TMEM_*. 52 * buf_ptr should point to the beginning of the buffer. Buffer will contain 53 * list of page addresses. OP-TEE core can reconstruct contiguous buffer from 54 * that page addresses list. Page addresses are stored as 64 bit values. 55 * Last entry on a page should point to the next page of buffer. 56 * Every entry in buffer should point to a 4k page beginning (12 least 57 * significant bits must be equal to zero). 58 * 59 * 12 least significant bits of optee_msg_param.u.tmem.buf_ptr should hold 60 * page offset of user buffer. 61 * 62 * So, entries should be placed like members of this structure: 63 * 64 * struct page_data { 65 * uint64_t pages_array[OPTEE_MSG_NONCONTIG_PAGE_SIZE/sizeof(uint64_t) - 1]; 66 * uint64_t next_page_data; 67 * }; 68 * 69 * Structure is designed to exactly fit into the page size 70 * OPTEE_MSG_NONCONTIG_PAGE_SIZE which is a standard 4KB page. 71 * 72 * The size of 4KB is chosen because this is the smallest page size for ARM 73 * architectures. If REE uses larger pages, it should divide them to 4KB ones. 74 */ 75 #define OPTEE_MSG_ATTR_NONCONTIG BIT(9) 76 77 /* 78 * Memory attributes for caching passed with temp memrefs. The actual value 79 * used is defined outside the message protocol with the exception of 80 * OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already 81 * defined for the memory range should be used. If optee_smc.h is used as 82 * bearer of this protocol OPTEE_SMC_SHM_* is used for values. 83 */ 84 #define OPTEE_MSG_ATTR_CACHE_SHIFT U(16) 85 #define OPTEE_MSG_ATTR_CACHE_MASK GENMASK_32(2, 0) 86 #define OPTEE_MSG_ATTR_CACHE_PREDEFINED U(0) 87 88 /* 89 * Same values as TEE_LOGIN_* from TEE Internal API 90 */ 91 #define OPTEE_MSG_LOGIN_PUBLIC U(0x00000000) 92 #define OPTEE_MSG_LOGIN_USER U(0x00000001) 93 #define OPTEE_MSG_LOGIN_GROUP U(0x00000002) 94 #define OPTEE_MSG_LOGIN_APPLICATION U(0x00000004) 95 #define OPTEE_MSG_LOGIN_APPLICATION_USER U(0x00000005) 96 #define OPTEE_MSG_LOGIN_APPLICATION_GROUP U(0x00000006) 97 98 /* 99 * Page size used in non-contiguous buffer entries 100 */ 101 #define OPTEE_MSG_NONCONTIG_PAGE_SIZE U(4096) 102 103 #define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff 104 105 #ifndef __ASSEMBLER__ 106 /** 107 * struct optee_msg_param_tmem - temporary memory reference parameter 108 * @buf_ptr: Address of the buffer 109 * @size: Size of the buffer 110 * @shm_ref: Temporary shared memory reference, pointer to a struct tee_shm 111 * 112 * Secure and normal world communicates pointers as physical address 113 * instead of the virtual address. This is because secure and normal world 114 * have completely independent memory mapping. Normal world can even have a 115 * hypervisor which need to translate the guest physical address (AKA IPA 116 * in ARM documentation) to a real physical address before passing the 117 * structure to secure world. 118 */ 119 struct optee_msg_param_tmem { 120 uint64_t buf_ptr; 121 uint64_t size; 122 uint64_t shm_ref; 123 }; 124 125 /** 126 * struct optee_msg_param_rmem - registered memory reference parameter 127 * @offs: Offset into shared memory reference 128 * @size: Size of the buffer 129 * @shm_ref: Shared memory reference, pointer to a struct tee_shm 130 */ 131 struct optee_msg_param_rmem { 132 uint64_t offs; 133 uint64_t size; 134 uint64_t shm_ref; 135 }; 136 137 /** 138 * struct optee_msg_param_fmem - FF-A memory reference parameter 139 * @offs_lower: Lower bits of offset into shared memory reference 140 * @offs_upper: Upper bits of offset into shared memory reference 141 * @internal_offs: Internal offset into the first page of shared memory 142 * reference 143 * @size: Size of the buffer 144 * @global_id: Global identifier of the shared memory 145 */ 146 struct optee_msg_param_fmem { 147 uint32_t offs_low; 148 uint16_t offs_high; 149 uint16_t internal_offs; 150 uint64_t size; 151 uint64_t global_id; 152 }; 153 154 /** 155 * struct optee_msg_param_value - opaque value parameter 156 * 157 * Value parameters are passed unchecked between normal and secure world. 158 */ 159 struct optee_msg_param_value { 160 uint64_t a; 161 uint64_t b; 162 uint64_t c; 163 }; 164 165 /** 166 * struct optee_msg_param - parameter used together with struct optee_msg_arg 167 * @attr: attributes 168 * @tmem: parameter by temporary memory reference 169 * @rmem: parameter by registered memory reference 170 * @fmem: parameter by FF-A registered memory reference 171 * @value: parameter by opaque value 172 * @octets: parameter by octet string 173 * 174 * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in 175 * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets, 176 * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and 177 * OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates 178 * @rmem or @fmem depending on the conduit. 179 * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used. 180 */ 181 struct optee_msg_param { 182 uint64_t attr; 183 union { 184 struct optee_msg_param_tmem tmem; 185 struct optee_msg_param_rmem rmem; 186 struct optee_msg_param_fmem fmem; 187 struct optee_msg_param_value value; 188 uint8_t octets[24]; 189 } u; 190 }; 191 192 /** 193 * struct optee_msg_arg - call argument 194 * @cmd: Command, one of OPTEE_MSG_CMD_* or OPTEE_MSG_RPC_CMD_* 195 * @func: Trusted Application function, specific to the Trusted Application, 196 * used if cmd == OPTEE_MSG_CMD_INVOKE_COMMAND 197 * @session: In parameter for all OPTEE_MSG_CMD_* except 198 * OPTEE_MSG_CMD_OPEN_SESSION where it's an output parameter instead 199 * @cancel_id: Cancellation id, a unique value to identify this request 200 * @ret: return value 201 * @ret_origin: origin of the return value 202 * @num_params: number of parameters supplied to the OS Command 203 * @params: the parameters supplied to the OS Command 204 * 205 * All normal calls to Trusted OS uses this struct. If cmd requires further 206 * information than what these fields hold it can be passed as a parameter 207 * tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding 208 * attrs field). All parameters tagged as meta have to come first. 209 */ 210 struct optee_msg_arg { 211 uint32_t cmd; 212 uint32_t func; 213 uint32_t session; 214 uint32_t cancel_id; 215 uint32_t pad; 216 uint32_t ret; 217 uint32_t ret_origin; 218 uint32_t num_params; 219 220 /* num_params tells the actual number of element in params */ 221 struct optee_msg_param params[]; 222 }; 223 224 /** 225 * OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg 226 * 227 * @num_params: Number of parameters embedded in the struct optee_msg_arg 228 * 229 * Returns the size of the struct optee_msg_arg together with the number 230 * of embedded parameters. 231 */ 232 #define OPTEE_MSG_GET_ARG_SIZE(num_params) \ 233 (sizeof(struct optee_msg_arg) + \ 234 sizeof(struct optee_msg_param) * (num_params)) 235 236 /* 237 * Defines the maximum value of @num_params that can be passed to 238 * OPTEE_MSG_GET_ARG_SIZE without a risk of crossing page boundary. 239 */ 240 #define OPTEE_MSG_MAX_NUM_PARAMS \ 241 ((OPTEE_MSG_NONCONTIG_PAGE_SIZE - sizeof(struct optee_msg_arg)) / \ 242 sizeof(struct optee_msg_param)) 243 244 #endif /*__ASSEMBLER__*/ 245 246 /***************************************************************************** 247 * Part 2 - requests from normal world 248 *****************************************************************************/ 249 250 /* 251 * Return the following UID if using API specified in this file without 252 * further extensions: 253 * 384fb3e0-e7f8-11e3-af63-0002a5d5c51b. 254 * Represented in 4 32-bit words in OPTEE_MSG_UID_0, OPTEE_MSG_UID_1, 255 * OPTEE_MSG_UID_2, OPTEE_MSG_UID_3. 256 */ 257 #define OPTEE_MSG_UID_0 U(0x384fb3e0) 258 #define OPTEE_MSG_UID_1 U(0xe7f811e3) 259 #define OPTEE_MSG_UID_2 U(0xaf630002) 260 #define OPTEE_MSG_UID_3 U(0xa5d5c51b) 261 #define OPTEE_MSG_FUNCID_CALLS_UID U(0xFF01) 262 263 /* 264 * Returns 2.0 if using API specified in this file without further 265 * extensions. Represented in 2 32-bit words in OPTEE_MSG_REVISION_MAJOR 266 * and OPTEE_MSG_REVISION_MINOR 267 */ 268 #define OPTEE_MSG_REVISION_MAJOR U(2) 269 #define OPTEE_MSG_REVISION_MINOR U(0) 270 #define OPTEE_MSG_FUNCID_CALLS_REVISION U(0xFF03) 271 272 /* 273 * Get UUID of Trusted OS. 274 * 275 * Used by non-secure world to figure out which Trusted OS is installed. 276 * Note that returned UUID is the UUID of the Trusted OS, not of the API. 277 * 278 * Returns UUID in 4 32-bit words in the same way as 279 * OPTEE_MSG_FUNCID_CALLS_UID described above. 280 */ 281 #define OPTEE_MSG_OS_OPTEE_UUID_0 U(0x486178e0) 282 #define OPTEE_MSG_OS_OPTEE_UUID_1 U(0xe7f811e3) 283 #define OPTEE_MSG_OS_OPTEE_UUID_2 U(0xbc5e0002) 284 #define OPTEE_MSG_OS_OPTEE_UUID_3 U(0xa5d5c51b) 285 #define OPTEE_MSG_FUNCID_GET_OS_UUID U(0x0000) 286 287 /* 288 * Get revision of Trusted OS. 289 * 290 * Used by non-secure world to figure out which version of the Trusted OS 291 * is installed. Note that the returned revision is the revision of the 292 * Trusted OS, not of the API. 293 * 294 * Returns revision in 2 32-bit words in the same way as 295 * OPTEE_MSG_CALLS_REVISION described above. 296 */ 297 #define OPTEE_MSG_FUNCID_GET_OS_REVISION U(0x0001) 298 299 /* 300 * Do a secure call with struct optee_msg_arg as argument 301 * The OPTEE_MSG_CMD_* below defines what goes in struct optee_msg_arg::cmd 302 * 303 * OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application. 304 * The first two parameters are tagged as meta, holding two value 305 * parameters to pass the following information: 306 * param[0].u.value.a-b uuid of Trusted Application 307 * param[1].u.value.a-b uuid of Client 308 * param[1].u.value.c Login class of client OPTEE_MSG_LOGIN_* 309 * 310 * OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened 311 * session to a Trusted Application. struct optee_msg_arg::func is Trusted 312 * Application function, specific to the Trusted Application. 313 * 314 * OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to 315 * Trusted Application. 316 * 317 * OPTEE_MSG_CMD_CANCEL cancels a currently invoked command. 318 * 319 * OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The 320 * information is passed as: 321 * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 322 * [| OPTEE_MSG_ATTR_NONCONTIG] 323 * [in] param[0].u.tmem.buf_ptr physical address (of first fragment) 324 * [in] param[0].u.tmem.size size (of first fragment) 325 * [in] param[0].u.tmem.shm_ref holds shared memory reference 326 * 327 * OPTEE_MSG_CMD_UNREGISTER_SHM unregisters a previously registered shared 328 * memory reference. The information is passed as: 329 * [in] param[0].attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 330 * [in] param[0].u.rmem.shm_ref holds shared memory reference 331 * [in] param[0].u.rmem.offs 0 332 * [in] param[0].u.rmem.size 0 333 * 334 * OPTEE_MSG_CMD_DO_BOTTOM_HALF does the scheduled bottom half processing 335 * of a driver. 336 * 337 * OPTEE_MSG_CMD_STOP_ASYNC_NOTIF informs secure world that from now is 338 * normal world unable to process asynchronous notifications. Typically 339 * used when the driver is shut down. 340 */ 341 #define OPTEE_MSG_CMD_OPEN_SESSION U(0) 342 #define OPTEE_MSG_CMD_INVOKE_COMMAND U(1) 343 #define OPTEE_MSG_CMD_CLOSE_SESSION U(2) 344 #define OPTEE_MSG_CMD_CANCEL U(3) 345 #define OPTEE_MSG_CMD_REGISTER_SHM U(4) 346 #define OPTEE_MSG_CMD_UNREGISTER_SHM U(5) 347 #define OPTEE_MSG_CMD_DO_BOTTOM_HALF U(6) 348 #define OPTEE_MSG_CMD_STOP_ASYNC_NOTIF U(7) 349 #define OPTEE_MSG_FUNCID_CALL_WITH_ARG U(0x0004) 350 351 #endif /* __OPTEE_MSG_H */ 352