* Copyright (c) 2015-2016, Linaro Limited
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* This file describes the API provided by a TEE driver to user space.
* Each TEE driver defines a TEE specific protocol which is used for the
* data passed back and forth using TEE_IOC_CMD.
/* Helpers to make the ioctl defines */
#define TEE_IOC_MAGIC 0xa4
/* Flags relating to shared memory */
#define TEE_IOCTL_SHM_MAPPED 0x1 /* memory mapped in normal world */
#define TEE_IOCTL_SHM_DMA_BUF 0x2 /* dma-buf handle on shared memory */
#define TEE_MAX_ARG_SIZE 1024
#define TEE_GEN_CAP_GP (1 << 0)/* GlobalPlatform compliant TEE */
#define TEE_GEN_CAP_PRIVILEGED (1 << 1)/* Privileged device (for supplicant) */
#define TEE_GEN_CAP_REG_MEM (1 << 2)/* Supports registering shared memory */
#define TEE_GEN_CAP_MEMREF_NULL (1 << 3)/* NULL MemRef support */
#define TEE_MEMREF_NULL (__u64)(-1) /* NULL MemRef Buffer */
#define TEE_IMPL_ID_OPTEE 1
* OP-TEE specific capabilities
#define TEE_OPTEE_CAP_TZ (1 << 0)
* struct tee_ioctl_version_data - TEE version
* @impl_id: [out] TEE implementation id
* @impl_caps: [out] Implementation specific capabilities
* @gen_caps: [out] Generic capabilities, defined by TEE_GEN_CAPS_* above
* Identifies the TEE implementation, @impl_id is one of TEE_IMPL_ID_* above.
* @impl_caps is implementation specific, for example TEE_OPTEE_CAP_*
* is valid when @impl_id == TEE_IMPL_ID_OPTEE.
struct tee_ioctl_version_data {
* TEE_IOC_VERSION - query version of TEE
* Takes a tee_ioctl_version_data struct and returns with the TEE version
#define TEE_IOC_VERSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 0, \
struct tee_ioctl_version_data)
* struct tee_ioctl_shm_alloc_data - Shared memory allocate argument
* @size: [in/out] Size of shared memory to allocate
* @flags: [in/out] Flags to/from allocation.
* @id: [out] Identifier of the shared memory
* The flags field should currently be zero as input. Updated by the call
* with actual flags as defined by TEE_IOCTL_SHM_* above.
* This structure is used as argument for TEE_IOC_SHM_ALLOC below.
struct tee_ioctl_shm_alloc_data {
* TEE_IOC_SHM_ALLOC - allocate shared memory
* Allocates shared memory between the user space process and secure OS.
* Returns a file descriptor on success or < 0 on failure
* The returned file descriptor is used to map the shared memory into user
* space. The shared memory is freed when the descriptor is closed and the
#define TEE_IOC_SHM_ALLOC _IOWR(TEE_IOC_MAGIC, TEE_IOC_BASE + 1, \
struct tee_ioctl_shm_alloc_data)
* struct tee_ioctl_buf_data - Variable sized buffer
* @buf_ptr: [in] A pointer to a buffer
* @buf_len: [in] Length of the buffer above
* Used as argument for TEE_IOC_OPEN_SESSION, TEE_IOC_INVOKE,
* TEE_IOC_SUPPL_RECV, and TEE_IOC_SUPPL_SEND below.
struct tee_ioctl_buf_data {
* Attributes for struct tee_ioctl_param, selects field in the union
#define TEE_IOCTL_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
* These defines value parameters (struct tee_ioctl_param_value)
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT 1
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
* These defines shared memory reference parameters (struct
* tee_ioctl_param_memref)
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT 5
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
* Mask for the type part of the attribute, leaves room for more types
#define TEE_IOCTL_PARAM_ATTR_TYPE_MASK 0xff
/* Meta parameter carrying extra information about the message. */
#define TEE_IOCTL_PARAM_ATTR_META 0x100
/* Mask of all known attr bits */
#define TEE_IOCTL_PARAM_ATTR_MASK \
(TEE_IOCTL_PARAM_ATTR_TYPE_MASK | TEE_IOCTL_PARAM_ATTR_META)
* Matches TEEC_LOGIN_* in GP TEE Client API
* Are only defined for GP compliant TEEs
#define TEE_IOCTL_LOGIN_PUBLIC 0
#define TEE_IOCTL_LOGIN_USER 1
#define TEE_IOCTL_LOGIN_GROUP 2
#define TEE_IOCTL_LOGIN_APPLICATION 4
#define TEE_IOCTL_LOGIN_USER_APPLICATION 5
#define TEE_IOCTL_LOGIN_GROUP_APPLICATION 6
* struct tee_ioctl_param - parameter
* @a: if a memref, offset into the shared memory object, else a value parameter
* @b: if a memref, size of the buffer, else a value parameter
* @c: if a memref, shared memory identifier, else a value parameter
* @attr & TEE_PARAM_ATTR_TYPE_MASK indicates if memref or value is used in
* the union. TEE_PARAM_ATTR_TYPE_VALUE_* indicates value and
* TEE_PARAM_ATTR_TYPE_MEMREF_* indicates memref. TEE_PARAM_ATTR_TYPE_NONE
* indicates that none of the members are used.
* Shared memory is allocated with TEE_IOC_SHM_ALLOC which returns an
* identifier representing the shared memory object. A memref can reference
* a part of a shared memory by specifying an offset (@a) and size (@b) of
* the object. To supply the entire shared memory object set the offset
* (@a) to 0 and size (@b) to the previously returned size of the object.
* A client may need to present a NULL pointer in the argument
* passed to a trusted application in the TEE.
* This is also a requirement in GlobalPlatform Client API v1.0c
* (section 3.2.5 memory references), which can be found at
* http://www.globalplatform.org/specificationsdevice.asp
* If a NULL pointer is passed to a TA in the TEE, the (@c)
* IOCTL parameters value must be set to TEE_MEMREF_NULL indicating a NULL
#define TEE_IOCTL_UUID_LEN 16
* struct tee_ioctl_open_session_arg - Open session argument
* @uuid: [in] UUID of the Trusted Application
* @clnt_uuid: [in] UUID of client
* @clnt_login: [in] Login class of client, TEE_IOCTL_LOGIN_* above
* @cancel_id: [in] Cancellation id, a unique value to identify this request
* @session: [out] Session id
* @ret: [out] return value
* @ret_origin [out] origin of the return value
* @num_params [in] number of parameters following this struct
struct tee_ioctl_open_session_arg {
__u8 uuid[TEE_IOCTL_UUID_LEN];
__u8 clnt_uuid[TEE_IOCTL_UUID_LEN];
/* num_params tells the actual number of element in params */
struct tee_ioctl_param params[];
* TEE_IOC_OPEN_SESSION - opens a session to a Trusted Application
* Takes a struct tee_ioctl_buf_data which contains a struct
* tee_ioctl_open_session_arg followed by any array of struct
#define TEE_IOC_OPEN_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 2, \
struct tee_ioctl_buf_data)
* struct tee_ioctl_invoke_func_arg - Invokes a function in a Trusted
* @func: [in] Trusted Application function, specific to the TA
* @session: [in] Session id
* @cancel_id: [in] Cancellation id, a unique value to identify this request
* @ret: [out] return value
* @ret_origin [out] origin of the return value
* @num_params [in] number of parameters following this struct
struct tee_ioctl_invoke_arg {
/* num_params tells the actual number of element in params */
struct tee_ioctl_param params[];
* TEE_IOC_INVOKE - Invokes a function in a Trusted Application
* Takes a struct tee_ioctl_buf_data which contains a struct
* tee_invoke_func_arg followed by any array of struct tee_param
#define TEE_IOC_INVOKE _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 3, \
struct tee_ioctl_buf_data)
* struct tee_ioctl_cancel_arg - Cancels an open session or invoke ioctl
* @cancel_id: [in] Cancellation id, a unique value to identify this request
* @session: [in] Session id, if the session is opened, else set to 0
struct tee_ioctl_cancel_arg {
* TEE_IOC_CANCEL - Cancels an open session or invoke
#define TEE_IOC_CANCEL _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 4, \
struct tee_ioctl_cancel_arg)
* struct tee_ioctl_close_session_arg - Closes an open session
* @session: [in] Session id
struct tee_ioctl_close_session_arg {
* TEE_IOC_CLOSE_SESSION - Closes a session
#define TEE_IOC_CLOSE_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 5, \
struct tee_ioctl_close_session_arg)
* struct tee_iocl_supp_recv_arg - Receive a request for a supplicant function
* @func: [in] supplicant function
* @num_params [in/out] number of parameters following this struct
* @num_params is the number of params that tee-supplicant has room to
* receive when input, @num_params is the number of actual params
* tee-supplicant receives when output.
struct tee_iocl_supp_recv_arg {
/* num_params tells the actual number of element in params */
struct tee_ioctl_param params[];
* TEE_IOC_SUPPL_RECV - Receive a request for a supplicant function
* Takes a struct tee_ioctl_buf_data which contains a struct
* tee_iocl_supp_recv_arg followed by any array of struct tee_param
#define TEE_IOC_SUPPL_RECV _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 6, \
struct tee_ioctl_buf_data)
* struct tee_iocl_supp_send_arg - Send a response to a received request
* @ret: [out] return value
* @num_params [in] number of parameters following this struct
struct tee_iocl_supp_send_arg {
/* num_params tells the actual number of element in params */
struct tee_ioctl_param params[];
* TEE_IOC_SUPPL_SEND - Receive a request for a supplicant function
* Takes a struct tee_ioctl_buf_data which contains a struct
* tee_iocl_supp_send_arg followed by any array of struct tee_param
#define TEE_IOC_SUPPL_SEND _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 7, \
struct tee_ioctl_buf_data)
* struct tee_ioctl_shm_register_data - Shared memory register argument
* @addr: [in] Start address of shared memory to register
* @length: [in/out] Length of shared memory to register
* @flags: [in/out] Flags to/from registration.
* @id: [out] Identifier of the shared memory
* The flags field should currently be zero as input. Updated by the call
* with actual flags as defined by TEE_IOCTL_SHM_* above.
* This structure is used as argument for TEE_IOC_SHM_REGISTER below.
struct tee_ioctl_shm_register_data {
* TEE_IOC_SHM_REGISTER - Register shared memory argument
* Registers shared memory between the user space process and secure OS.
* Returns a file descriptor on success or < 0 on failure
* The shared memory is unregisterred when the descriptor is closed.
#define TEE_IOC_SHM_REGISTER _IOWR(TEE_IOC_MAGIC, TEE_IOC_BASE + 9, \
struct tee_ioctl_shm_register_data)
* Five syscalls are used when communicating with the TEE driver.
* open(): opens the device associated with the driver
* ioctl(): as described above operating on the file descriptor from open()
* - closes the device file descriptor
* - closes a file descriptor connected to allocated shared memory
* mmap(): maps shared memory into user space using information from struct
* tee_ioctl_shm_alloc_data
* munmap(): unmaps previously shared memory
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
