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u-boot/include/tee.h
Igor Opaniuk fc1fe01b08 avb: add support for named persistent values 
AVB 2.0 spec. revision 1.1 introduces support for named persistent values
that must be tamper evident and allows AVB to store arbitrary key-value
pairs [1].

Introduce implementation of two additional AVB operations
read_persistent_value()/write_persistent_value() for retrieving/storing
named persistent values.

Correspondent pull request in the OP-TEE OS project repo [2].

[1]: https://android.googlesource.com/platform/external/avb/+/android-9.0.0_r22
[2]: https://github.com/OP-TEE/optee_os/pull/2699

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
2019-04-26 18:58:22 -04:00

378 lines
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2018 Linaro Limited
*/
#ifndef __TEE_H
#define __TEE_H
#define TEE_UUID_LEN 16
#define TEE_GEN_CAP_GP BIT(0) /* GlobalPlatform compliant TEE */
#define TEE_GEN_CAP_REG_MEM BIT(1) /* Supports registering shared memory */
#define TEE_SHM_REGISTER BIT(0) /* In list of shared memory */
#define TEE_SHM_SEC_REGISTER BIT(1) /* TEE notified of this memory */
#define TEE_SHM_ALLOC BIT(2) /* The memory is malloced() and must */
/* be freed() */
#define TEE_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
#define TEE_PARAM_ATTR_TYPE_VALUE_INPUT 1
#define TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
#define TEE_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
#define TEE_PARAM_ATTR_TYPE_MEMREF_INPUT 5
#define TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
#define TEE_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
#define TEE_PARAM_ATTR_TYPE_MASK 0xff
#define TEE_PARAM_ATTR_META 0x100
#define TEE_PARAM_ATTR_MASK (TEE_PARAM_ATTR_TYPE_MASK | \
TEE_PARAM_ATTR_META)
/*
* Some Global Platform error codes which has a meaning if the
* TEE_GEN_CAP_GP bit is returned by the driver in
* struct tee_version_data::gen_caps
*/
#define TEE_SUCCESS 0x00000000
#define TEE_ERROR_STORAGE_NOT_AVAILABLE 0xf0100003
#define TEE_ERROR_GENERIC 0xffff0000
#define TEE_ERROR_BAD_PARAMETERS 0xffff0006
#define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008
#define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009
#define TEE_ERROR_NOT_SUPPORTED 0xffff000a
#define TEE_ERROR_COMMUNICATION 0xffff000e
#define TEE_ERROR_SECURITY 0xffff000f
#define TEE_ERROR_OUT_OF_MEMORY 0xffff000c
#define TEE_ERROR_OVERFLOW 0xffff300f
#define TEE_ERROR_TARGET_DEAD 0xffff3024
#define TEE_ERROR_STORAGE_NO_SPACE 0xffff3041
#define TEE_ORIGIN_COMMS 0x00000002
#define TEE_ORIGIN_TEE 0x00000003
#define TEE_ORIGIN_TRUSTED_APP 0x00000004
struct udevice;
/**
* struct tee_optee_ta_uuid - OP-TEE Trusted Application (TA) UUID format
*
* Used to identify an OP-TEE TA and define suitable to initialize structs
* of this format is distributed with the interface of the TA. The
* individual fields of this struct doesn't have any special meaning in
* OP-TEE. See RFC4122 for details on the format.
*/
struct tee_optee_ta_uuid {
u32 time_low;
u16 time_mid;
u16 time_hi_and_version;
u8 clock_seq_and_node[8];
};
/**
* struct tee_shm - memory shared with the TEE
* @dev: The TEE device
* @link: List node in the list in struct struct tee_uclass_priv
* @addr: Pointer to the shared memory
* @size: Size of the the shared memory
* @flags: TEE_SHM_* above
*/
struct tee_shm {
struct udevice *dev;
struct list_head link;
void *addr;
ulong size;
u32 flags;
};
/**
* struct tee_param_memref - memory reference for a Trusted Application
* @shm_offs: Offset in bytes into the shared memory object @shm
* @size: Size in bytes of the memory reference
* @shm: Pointer to a shared memory object for the buffer
*
* Used as a part of struct tee_param, see that for more information.
*/
struct tee_param_memref {
ulong shm_offs;
ulong size;
struct tee_shm *shm;
};
/**
* struct tee_param_value - value parameter for a Trusted Application
* @a, @b, @c: Parameters passed by value
*
* Used as a part of struct tee_param, see that for more information.
*/
struct tee_param_value {
u64 a;
u64 b;
u64 c;
};
/**
* struct tee_param - invoke parameter for a Trusted Application
* @attr: Attributes
* @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
* TEE_PARAM_ATTR_TYPE_MEMREF_* above
* @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
* TEE_PARAM_ATTR_TYPE_VALUE_* above
*
* Parameters to TA are passed using an array of this struct, for
* flexibility both value parameters and memory refereces can be used.
*/
struct tee_param {
u64 attr;
union {
struct tee_param_memref memref;
struct tee_param_value value;
} u;
};
/**
* struct tee_open_session_arg - extra arguments for tee_open_session()
* @uuid: [in] UUID of the Trusted Application
* @clnt_uuid: [in] Normally zeroes
* @clnt_login: [in] Normally 0
* @session: [out] Session id
* @ret: [out] return value
* @ret_origin: [out] origin of the return value
*/
struct tee_open_session_arg {
u8 uuid[TEE_UUID_LEN];
u8 clnt_uuid[TEE_UUID_LEN];
u32 clnt_login;
u32 session;
u32 ret;
u32 ret_origin;
};
/**
* struct tee_invoke_arg - extra arguments for tee_invoke_func()
* @func: [in] Trusted Application function, specific to the TA
* @session: [in] Session id, from open session
* @ret: [out] return value
* @ret_origin: [out] origin of the return value
*/
struct tee_invoke_arg {
u32 func;
u32 session;
u32 ret;
u32 ret_origin;
};
/**
* struct tee_version_data - description of TEE
* @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
*/
struct tee_version_data {
u32 gen_caps;
};
/**
* struct tee_driver_ops - TEE driver operations
* @get_version: Query capabilities of TEE device,
* @open_session: Opens a session to a Trusted Application in the TEE,
* @close_session: Closes a session to Trusted Application,
* @invoke_func: Invokes a function in a Trusted Application,
* @shm_register: Registers memory shared with the TEE
* @shm_unregister: Unregisters memory shared with the TEE
*/
struct tee_driver_ops {
/**
* get_version() - Query capabilities of TEE device
* @dev: The TEE device
* @vers: Pointer to version data
*/
void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
/**
* open_session() - Open a session to a Trusted Application
* @dev: The TEE device
* @arg: Open session arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result. If @arg->ret is
* TEE_SUCCESS the session identifier is available in @arg->session.
*/
int (*open_session)(struct udevice *dev,
struct tee_open_session_arg *arg, uint num_param,
struct tee_param *param);
/**
* close_session() - Close a session to a Trusted Application
* @dev: The TEE device
* @session: Session id
*
* Return < 0 on error else 0, regardless the session will not be valid
* after this function has returned.
*/
int (*close_session)(struct udevice *dev, u32 session);
/**
* tee_invoke_func() - Invoke a function in a Trusted Application
* @dev: The TEE device
* @arg: Invoke arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result.
*/
int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
uint num_param, struct tee_param *param);
/**
* shm_register() - Registers memory shared with the TEE
* @dev: The TEE device
* @shm: Pointer to a shared memory object
* Returns 0 on success or < 0 on failure.
*/
int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
/**
* shm_unregister() - Unregisters memory shared with the TEE
* @dev: The TEE device
* @shm: Pointer to a shared memory object
* Returns 0 on success or < 0 on failure.
*/
int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
};
/**
* __tee_shm_add() - Internal helper function to register shared memory
* @dev: The TEE device
* @align: Required alignment of allocated memory block if
* (@flags & TEE_SHM_ALLOC)
* @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
u32 flags, struct tee_shm **shmp);
/**
* tee_shm_alloc() - Allocate shared memory
* @dev: The TEE device
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
struct tee_shm **shmp);
/**
* tee_shm_register() - Registers shared memory
* @dev: The TEE device
* @addr: Address of memory block
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
struct tee_shm **shmp);
/**
* tee_shm_free() - Frees shared memory
* @shm: Shared memory object
*/
void tee_shm_free(struct tee_shm *shm);
/**
* tee_shm_is_registered() - Check register status of shared memory object
* @shm: Pointer to shared memory object
* @dev: The TEE device
*
* Returns true if the shared memory object is registered for the supplied
* TEE device
*/
bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
/**
* tee_find_device() - Look up a TEE device
* @start: if not NULL, continue search after this device
* @match: function to check TEE device, returns != 0 if the device
* matches
* @data: data for match function
* @vers: if not NULL, version data of TEE device of the device returned
*
* Returns a probed TEE device of the first TEE device matched by the
* match() callback or NULL.
*/
struct udevice *tee_find_device(struct udevice *start,
int (*match)(struct tee_version_data *vers,
const void *data),
const void *data,
struct tee_version_data *vers);
/**
* tee_get_version() - Query capabilities of TEE device
* @dev: The TEE device
* @vers: Pointer to version data
*/
void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
/**
* tee_open_session() - Open a session to a Trusted Application
* @dev: The TEE device
* @arg: Open session arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result. If @arg->ret is
* TEE_SUCCESS the session identifier is available in @arg->session.
*/
int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
uint num_param, struct tee_param *param);
/**
* tee_close_session() - Close a session to a Trusted Application
* @dev: The TEE device
* @session: Session id
*
* Return < 0 on error else 0, regardless the session will not be valid
* after this function has returned.
*/
int tee_close_session(struct udevice *dev, u32 session);
/**
* tee_invoke_func() - Invoke a function in a Trusted Application
* @dev: The TEE device
* @arg: Invoke arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result.
*/
int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
uint num_param, struct tee_param *param);
/**
* tee_optee_ta_uuid_from_octets() - Converts to struct tee_optee_ta_uuid
* @d: Destination struct
* @s: Source UUID octets
*
* Conversion to a struct tee_optee_ta_uuid represantion from binary octet
* representation.
*/
void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
const u8 s[TEE_UUID_LEN]);
/**
* tee_optee_ta_uuid_to_octets() - Converts from struct tee_optee_ta_uuid
* @d: Destination UUID octets
* @s: Source struct
*
* Conversion from a struct tee_optee_ta_uuid represantion to binary octet
* representation.
*/
void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
const struct tee_optee_ta_uuid *s);
#endif /* __TEE_H */
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