| /* SPDX-License-Identifier: BSD-2-Clause */ |
| /* |
| * Copyright (c) 2019-2021, Linaro Limited |
| */ |
| |
| /* |
| * This file is exported by OP-TEE and is kept in sync between secure world |
| * and normal world drivers. We're using ARM FF-A 1.0 specification. |
| */ |
| |
| #ifndef __OPTEE_FFA_H |
| #define __OPTEE_FFA_H |
| |
| #include <linux/arm_ffa.h> |
| |
| /* |
| * Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and |
| * responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal |
| * messages. |
| * |
| * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP |
| * are using the AArch32 SMC calling convention with register usage as |
| * defined in FF-A specification: |
| * w0: Function ID (0x8400006F or 0x84000070) |
| * w1: Source/Destination IDs |
| * w2: Reserved (MBZ) |
| * w3-w7: Implementation defined, free to be used below |
| */ |
| |
| #define OPTEE_FFA_VERSION_MAJOR 1 |
| #define OPTEE_FFA_VERSION_MINOR 0 |
| |
| #define OPTEE_FFA_BLOCKING_CALL(id) (id) |
| #define OPTEE_FFA_YIELDING_CALL_BIT 31 |
| #define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT)) |
| |
| /* |
| * Returns the API version implemented, currently follows the FF-A version. |
| * Call register usage: |
| * w3: Service ID, OPTEE_FFA_GET_API_VERSION |
| * w4-w7: Not used (MBZ) |
| * |
| * Return register usage: |
| * w3: OPTEE_FFA_VERSION_MAJOR |
| * w4: OPTEE_FFA_VERSION_MINOR |
| * w5-w7: Not used (MBZ) |
| */ |
| #define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0) |
| |
| /* |
| * Returns the revision of OP-TEE. |
| * |
| * Used by non-secure world to figure out which version of the Trusted OS |
| * is installed. Note that the returned revision is the revision of the |
| * Trusted OS, not of the API. |
| * |
| * Call register usage: |
| * w3: Service ID, OPTEE_FFA_GET_OS_VERSION |
| * w4-w7: Unused (MBZ) |
| * |
| * Return register usage: |
| * w3: CFG_OPTEE_REVISION_MAJOR |
| * w4: CFG_OPTEE_REVISION_MINOR |
| * w5: TEE_IMPL_GIT_SHA1 (or zero if not supported) |
| */ |
| #define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1) |
| |
| /* |
| * Exchange capabilities between normal world and secure world. |
| * |
| * Currently there are no defined capabilities. When features are added new |
| * capabilities may be added. |
| * |
| * Call register usage: |
| * w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES |
| * w4-w7: Note used (MBZ) |
| * |
| * Return register usage: |
| * w3: Error code, 0 on success |
| * w4: Bit[7:0]: Number of parameters needed for RPC to be supplied |
| * as the second MSG arg struct for |
| * OPTEE_FFA_YIELDING_CALL_WITH_ARG. |
| * Bit[31:8]: Reserved (MBZ) |
| * w5-w7: Note used (MBZ) |
| */ |
| #define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2) |
| |
| /* |
| * Unregister shared memory |
| * |
| * Call register usage: |
| * w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM |
| * w4: Shared memory handle, lower bits |
| * w5: Shared memory handle, higher bits |
| * w6-w7: Not used (MBZ) |
| * |
| * Return register usage: |
| * w3: Error code, 0 on success |
| * w4-w7: Note used (MBZ) |
| */ |
| #define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3) |
| |
| /* |
| * Call with struct optee_msg_arg as argument in the supplied shared memory |
| * with a zero internal offset and normal cached memory attributes. |
| * Register usage: |
| * w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG |
| * w4: Lower 32 bits of a 64-bit Shared memory handle |
| * w5: Upper 32 bits of a 64-bit Shared memory handle |
| * w6: Offset into shared memory pointing to a struct optee_msg_arg |
| * right after the parameters of this struct (at offset |
| * OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg |
| * for RPC, this struct has reserved space for the number of RPC |
| * parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES. |
| * w7: Not used (MBZ) |
| * Resume from RPC. Register usage: |
| * w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME |
| * w4-w6: Not used (MBZ) |
| * w7: Resume info |
| * |
| * Normal return (yielding call is completed). Register usage: |
| * w3: Error code, 0 on success |
| * w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| * w5-w7: Not used (MBZ) |
| * |
| * RPC interrupt return (RPC from secure world). Register usage: |
| * w3: Error code == 0 |
| * w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| * w5-w6: Not used (MBZ) |
| * w7: Resume info |
| * |
| * Possible error codes in register w3: |
| * 0: Success |
| * FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START |
| * OPTEE_FFA_YIELDING_CALL_RESUME |
| * |
| * Possible error codes for OPTEE_FFA_YIELDING_CALL_START, |
| * FFA_BUSY: Number of OP-TEE OS threads exceeded, |
| * try again later |
| * FFA_DENIED: RPC shared memory object not found |
| * FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory |
| * |
| * Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME |
| * FFA_INVALID_PARAMETER: Bad resume info |
| */ |
| #define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0) |
| #define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1) |
| |
| #define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0 |
| #define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1 |
| #define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2 |
| |
| #endif /*__OPTEE_FFA_H*/ |
