352 lines
12 KiB
C
352 lines
12 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
|
|
/*
|
|
* Copyright (c) 2015-2021, Linaro Limited
|
|
*/
|
|
#ifndef _OPTEE_MSG_H
|
|
#define _OPTEE_MSG_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* This file defines the OP-TEE message protocol (ABI) used to communicate
|
|
* with an instance of OP-TEE running in secure world.
|
|
*
|
|
* This file is divided into two sections.
|
|
* 1. Formatting of messages.
|
|
* 2. Requests from normal world
|
|
*/
|
|
|
|
/*****************************************************************************
|
|
* Part 1 - formatting of messages
|
|
*****************************************************************************/
|
|
|
|
#define OPTEE_MSG_ATTR_TYPE_NONE 0x0
|
|
#define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT 0x1
|
|
#define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT 0x2
|
|
#define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT 0x3
|
|
#define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5
|
|
#define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6
|
|
#define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7
|
|
#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
|
|
#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT
|
|
#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT
|
|
#define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9
|
|
#define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa
|
|
#define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb
|
|
|
|
#define OPTEE_MSG_ATTR_TYPE_MASK GENMASK(7, 0)
|
|
|
|
/*
|
|
* Meta parameter to be absorbed by the Secure OS and not passed
|
|
* to the Trusted Application.
|
|
*
|
|
* Currently only used with OPTEE_MSG_CMD_OPEN_SESSION.
|
|
*/
|
|
#define OPTEE_MSG_ATTR_META BIT(8)
|
|
|
|
/*
|
|
* Pointer to a list of pages used to register user-defined SHM buffer.
|
|
* Used with OPTEE_MSG_ATTR_TYPE_TMEM_*.
|
|
* buf_ptr should point to the beginning of the buffer. Buffer will contain
|
|
* list of page addresses. OP-TEE core can reconstruct contiguous buffer from
|
|
* that page addresses list. Page addresses are stored as 64 bit values.
|
|
* Last entry on a page should point to the next page of buffer.
|
|
* Every entry in buffer should point to a 4k page beginning (12 least
|
|
* significant bits must be equal to zero).
|
|
*
|
|
* 12 least significant bits of optee_msg_param.u.tmem.buf_ptr should hold
|
|
* page offset of user buffer.
|
|
*
|
|
* So, entries should be placed like members of this structure:
|
|
*
|
|
* struct page_data {
|
|
* uint64_t pages_array[OPTEE_MSG_NONCONTIG_PAGE_SIZE/sizeof(uint64_t) - 1];
|
|
* uint64_t next_page_data;
|
|
* };
|
|
*
|
|
* Structure is designed to exactly fit into the page size
|
|
* OPTEE_MSG_NONCONTIG_PAGE_SIZE which is a standard 4KB page.
|
|
*
|
|
* The size of 4KB is chosen because this is the smallest page size for ARM
|
|
* architectures. If REE uses larger pages, it should divide them to 4KB ones.
|
|
*/
|
|
#define OPTEE_MSG_ATTR_NONCONTIG BIT(9)
|
|
|
|
/*
|
|
* Memory attributes for caching passed with temp memrefs. The actual value
|
|
* used is defined outside the message protocol with the exception of
|
|
* OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already
|
|
* defined for the memory range should be used. If optee_smc.h is used as
|
|
* bearer of this protocol OPTEE_SMC_SHM_* is used for values.
|
|
*/
|
|
#define OPTEE_MSG_ATTR_CACHE_SHIFT 16
|
|
#define OPTEE_MSG_ATTR_CACHE_MASK GENMASK(2, 0)
|
|
#define OPTEE_MSG_ATTR_CACHE_PREDEFINED 0
|
|
|
|
/*
|
|
* Same values as TEE_LOGIN_* from TEE Internal API
|
|
*/
|
|
#define OPTEE_MSG_LOGIN_PUBLIC 0x00000000
|
|
#define OPTEE_MSG_LOGIN_USER 0x00000001
|
|
#define OPTEE_MSG_LOGIN_GROUP 0x00000002
|
|
#define OPTEE_MSG_LOGIN_APPLICATION 0x00000004
|
|
#define OPTEE_MSG_LOGIN_APPLICATION_USER 0x00000005
|
|
#define OPTEE_MSG_LOGIN_APPLICATION_GROUP 0x00000006
|
|
|
|
/*
|
|
* Page size used in non-contiguous buffer entries
|
|
*/
|
|
#define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096
|
|
|
|
#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff
|
|
|
|
/**
|
|
* struct optee_msg_param_tmem - temporary memory reference parameter
|
|
* @buf_ptr: Address of the buffer
|
|
* @size: Size of the buffer
|
|
* @shm_ref: Temporary shared memory reference, pointer to a struct tee_shm
|
|
*
|
|
* Secure and normal world communicates pointers as physical address
|
|
* instead of the virtual address. This is because secure and normal world
|
|
* have completely independent memory mapping. Normal world can even have a
|
|
* hypervisor which need to translate the guest physical address (AKA IPA
|
|
* in ARM documentation) to a real physical address before passing the
|
|
* structure to secure world.
|
|
*/
|
|
struct optee_msg_param_tmem {
|
|
u64 buf_ptr;
|
|
u64 size;
|
|
u64 shm_ref;
|
|
};
|
|
|
|
/**
|
|
* struct optee_msg_param_rmem - registered memory reference parameter
|
|
* @offs: Offset into shared memory reference
|
|
* @size: Size of the buffer
|
|
* @shm_ref: Shared memory reference, pointer to a struct tee_shm
|
|
*/
|
|
struct optee_msg_param_rmem {
|
|
u64 offs;
|
|
u64 size;
|
|
u64 shm_ref;
|
|
};
|
|
|
|
/**
|
|
* struct optee_msg_param_fmem - ffa memory reference parameter
|
|
* @offs_lower: Lower bits of offset into shared memory reference
|
|
* @offs_upper: Upper bits of offset into shared memory reference
|
|
* @internal_offs: Internal offset into the first page of shared memory
|
|
* reference
|
|
* @size: Size of the buffer
|
|
* @global_id: Global identifier of Shared memory
|
|
*/
|
|
struct optee_msg_param_fmem {
|
|
u32 offs_low;
|
|
u16 offs_high;
|
|
u16 internal_offs;
|
|
u64 size;
|
|
u64 global_id;
|
|
};
|
|
|
|
/**
|
|
* struct optee_msg_param_value - opaque value parameter
|
|
*
|
|
* Value parameters are passed unchecked between normal and secure world.
|
|
*/
|
|
struct optee_msg_param_value {
|
|
u64 a;
|
|
u64 b;
|
|
u64 c;
|
|
};
|
|
|
|
/**
|
|
* struct optee_msg_param - parameter used together with struct optee_msg_arg
|
|
* @attr: attributes
|
|
* @tmem: parameter by temporary memory reference
|
|
* @rmem: parameter by registered memory reference
|
|
* @fmem: parameter by ffa registered memory reference
|
|
* @value: parameter by opaque value
|
|
* @octets: parameter by octet string
|
|
*
|
|
* @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
|
|
* the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets,
|
|
* OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and
|
|
* OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates
|
|
* @rmem or @fmem depending on the conduit.
|
|
* OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
|
|
*/
|
|
struct optee_msg_param {
|
|
u64 attr;
|
|
union {
|
|
struct optee_msg_param_tmem tmem;
|
|
struct optee_msg_param_rmem rmem;
|
|
struct optee_msg_param_fmem fmem;
|
|
struct optee_msg_param_value value;
|
|
u8 octets[24];
|
|
} u;
|
|
};
|
|
|
|
/**
|
|
* struct optee_msg_arg - call argument
|
|
* @cmd: Command, one of OPTEE_MSG_CMD_* or OPTEE_MSG_RPC_CMD_*
|
|
* @func: Trusted Application function, specific to the Trusted Application,
|
|
* used if cmd == OPTEE_MSG_CMD_INVOKE_COMMAND
|
|
* @session: In parameter for all OPTEE_MSG_CMD_* except
|
|
* OPTEE_MSG_CMD_OPEN_SESSION where it's an output parameter instead
|
|
* @cancel_id: Cancellation id, a unique value to identify this request
|
|
* @ret: return value
|
|
* @ret_origin: origin of the return value
|
|
* @num_params: number of parameters supplied to the OS Command
|
|
* @params: the parameters supplied to the OS Command
|
|
*
|
|
* All normal calls to Trusted OS uses this struct. If cmd requires further
|
|
* information than what these fields hold it can be passed as a parameter
|
|
* tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding
|
|
* attrs field). All parameters tagged as meta have to come first.
|
|
*/
|
|
struct optee_msg_arg {
|
|
u32 cmd;
|
|
u32 func;
|
|
u32 session;
|
|
u32 cancel_id;
|
|
u32 pad;
|
|
u32 ret;
|
|
u32 ret_origin;
|
|
u32 num_params;
|
|
|
|
/* num_params tells the actual number of element in params */
|
|
struct optee_msg_param params[];
|
|
};
|
|
|
|
/**
|
|
* OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg
|
|
*
|
|
* @num_params: Number of parameters embedded in the struct optee_msg_arg
|
|
*
|
|
* Returns the size of the struct optee_msg_arg together with the number
|
|
* of embedded parameters.
|
|
*/
|
|
#define OPTEE_MSG_GET_ARG_SIZE(num_params) \
|
|
(sizeof(struct optee_msg_arg) + \
|
|
sizeof(struct optee_msg_param) * (num_params))
|
|
|
|
/*****************************************************************************
|
|
* Part 2 - requests from normal world
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Return the following UID if using API specified in this file without
|
|
* further extensions:
|
|
* 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
|
|
* Represented in 4 32-bit words in OPTEE_MSG_UID_0, OPTEE_MSG_UID_1,
|
|
* OPTEE_MSG_UID_2, OPTEE_MSG_UID_3.
|
|
*
|
|
* In the case where the OP-TEE image is loaded by the kernel, this will
|
|
* initially return an alternate UID to reflect that we are communicating with
|
|
* the TF-A image loading service at that time instead of OP-TEE. That UID is:
|
|
* a3fbeab1-1246-315d-c7c4-06b9c03cbea4.
|
|
* Represented in 4 32-bit words in OPTEE_MSG_IMAGE_LOAD_UID_0,
|
|
* OPTEE_MSG_IMAGE_LOAD_UID_1, OPTEE_MSG_IMAGE_LOAD_UID_2,
|
|
* OPTEE_MSG_IMAGE_LOAD_UID_3.
|
|
*/
|
|
#define OPTEE_MSG_UID_0 0x384fb3e0
|
|
#define OPTEE_MSG_UID_1 0xe7f811e3
|
|
#define OPTEE_MSG_UID_2 0xaf630002
|
|
#define OPTEE_MSG_UID_3 0xa5d5c51b
|
|
#define OPTEE_MSG_IMAGE_LOAD_UID_0 0xa3fbeab1
|
|
#define OPTEE_MSG_IMAGE_LOAD_UID_1 0x1246315d
|
|
#define OPTEE_MSG_IMAGE_LOAD_UID_2 0xc7c406b9
|
|
#define OPTEE_MSG_IMAGE_LOAD_UID_3 0xc03cbea4
|
|
#define OPTEE_MSG_FUNCID_CALLS_UID 0xFF01
|
|
|
|
/*
|
|
* Returns 2.0 if using API specified in this file without further
|
|
* extensions. Represented in 2 32-bit words in OPTEE_MSG_REVISION_MAJOR
|
|
* and OPTEE_MSG_REVISION_MINOR
|
|
*/
|
|
#define OPTEE_MSG_REVISION_MAJOR 2
|
|
#define OPTEE_MSG_REVISION_MINOR 0
|
|
#define OPTEE_MSG_FUNCID_CALLS_REVISION 0xFF03
|
|
|
|
/*
|
|
* Get UUID of Trusted OS.
|
|
*
|
|
* Used by non-secure world to figure out which Trusted OS is installed.
|
|
* Note that returned UUID is the UUID of the Trusted OS, not of the API.
|
|
*
|
|
* Returns UUID in 4 32-bit words in the same way as
|
|
* OPTEE_MSG_FUNCID_CALLS_UID described above.
|
|
*/
|
|
#define OPTEE_MSG_OS_OPTEE_UUID_0 0x486178e0
|
|
#define OPTEE_MSG_OS_OPTEE_UUID_1 0xe7f811e3
|
|
#define OPTEE_MSG_OS_OPTEE_UUID_2 0xbc5e0002
|
|
#define OPTEE_MSG_OS_OPTEE_UUID_3 0xa5d5c51b
|
|
#define OPTEE_MSG_FUNCID_GET_OS_UUID 0x0000
|
|
|
|
/*
|
|
* Get revision of Trusted OS.
|
|
*
|
|
* 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.
|
|
*
|
|
* Returns revision in 2 32-bit words in the same way as
|
|
* OPTEE_MSG_CALLS_REVISION described above.
|
|
*/
|
|
#define OPTEE_MSG_FUNCID_GET_OS_REVISION 0x0001
|
|
|
|
/*
|
|
* Do a secure call with struct optee_msg_arg as argument
|
|
* The OPTEE_MSG_CMD_* below defines what goes in struct optee_msg_arg::cmd
|
|
*
|
|
* OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application.
|
|
* The first two parameters are tagged as meta, holding two value
|
|
* parameters to pass the following information:
|
|
* param[0].u.value.a-b uuid of Trusted Application
|
|
* param[1].u.value.a-b uuid of Client
|
|
* param[1].u.value.c Login class of client OPTEE_MSG_LOGIN_*
|
|
*
|
|
* OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened
|
|
* session to a Trusted Application. struct optee_msg_arg::func is Trusted
|
|
* Application function, specific to the Trusted Application.
|
|
*
|
|
* OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to
|
|
* Trusted Application.
|
|
*
|
|
* OPTEE_MSG_CMD_CANCEL cancels a currently invoked command.
|
|
*
|
|
* OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The
|
|
* information is passed as:
|
|
* [in] param[0].attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
|
|
* [| OPTEE_MSG_ATTR_NONCONTIG]
|
|
* [in] param[0].u.tmem.buf_ptr physical address (of first fragment)
|
|
* [in] param[0].u.tmem.size size (of first fragment)
|
|
* [in] param[0].u.tmem.shm_ref holds shared memory reference
|
|
*
|
|
* OPTEE_MSG_CMD_UNREGISTER_SHM unregisters a previously registered shared
|
|
* memory reference. The information is passed as:
|
|
* [in] param[0].attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
|
|
* [in] param[0].u.rmem.shm_ref holds shared memory reference
|
|
* [in] param[0].u.rmem.offs 0
|
|
* [in] param[0].u.rmem.size 0
|
|
*
|
|
* OPTEE_MSG_CMD_DO_BOTTOM_HALF does the scheduled bottom half processing
|
|
* of a driver.
|
|
*
|
|
* OPTEE_MSG_CMD_STOP_ASYNC_NOTIF informs secure world that from now is
|
|
* normal world unable to process asynchronous notifications. Typically
|
|
* used when the driver is shut down.
|
|
*/
|
|
#define OPTEE_MSG_CMD_OPEN_SESSION 0
|
|
#define OPTEE_MSG_CMD_INVOKE_COMMAND 1
|
|
#define OPTEE_MSG_CMD_CLOSE_SESSION 2
|
|
#define OPTEE_MSG_CMD_CANCEL 3
|
|
#define OPTEE_MSG_CMD_REGISTER_SHM 4
|
|
#define OPTEE_MSG_CMD_UNREGISTER_SHM 5
|
|
#define OPTEE_MSG_CMD_DO_BOTTOM_HALF 6
|
|
#define OPTEE_MSG_CMD_STOP_ASYNC_NOTIF 7
|
|
#define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0x0004
|
|
|
|
#endif /* _OPTEE_MSG_H */
|