secure_fw/spm/ffm/psa_api.h

/*
 * Copyright (c) 2019-2021, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

#ifndef __PSA_API_H__
#define __PSA_API_H__

#include <stdint.h>
#include <stdbool.h>
#include "psa/client.h"
#include "psa/service.h"

#define PROGRAMMER_ERROR_NULL
#define TFM_PROGRAMMER_ERROR(ns_caller, error_status) \
        do { \
            if (ns_caller) { \
                return error_status; \
             } else { \
                tfm_core_panic(); \
             } \
        } while (0)

/* PSA Client API function body, for privileged use only. */

/**
 * \brief handler for \ref psa_framework_version.
 *
 * \return version              The version of the PSA Framework implementation
 *                              that is providing the runtime services.
 */
uint32_t tfm_spm_client_psa_framework_version(void);

/**
 * \brief handler for \ref psa_version.
 *
 * \param[in] sid               RoT Service identity.
 * \param[in] ns_caller         If 'true', call from non-secure client.
 *                              Otherwise from secure client.
 *
 * \retval PSA_VERSION_NONE     The RoT Service is not implemented, or the
 *                              caller is not permitted to access the service.
 * \retval > 0                  The version of the implemented RoT Service.
 */
uint32_t tfm_spm_client_psa_version(uint32_t sid, bool ns_caller);

/**
 * \brief handler for \ref psa_connect.
 *
 * \param[in] sid               RoT Service identity.
 * \param[in] version           The version of the RoT Service.
 * \param[in] ns_caller         If 'true', call from non-secure client.
 *                              Otherwise from secure client.
 *
 * \retval PSA_SUCCESS          Success.
 * \retval PSA_ERROR_CONNECTION_REFUSED The SPM or RoT Service has refused the
 *                              connection.
 * \retval PSA_ERROR_CONNECTION_BUSY The SPM or RoT Service cannot make the
 *                              connection at the moment.
 * \retval "Does not return"    The RoT Service ID and version are not
 *                              supported, or the caller is not permitted to
 *                              access the service.
 */
psa_status_t tfm_spm_client_psa_connect(uint32_t sid, uint32_t version,
                                        bool ns_caller);

/**
 * \brief handler for \ref psa_call.
 *
 * \param[in] handle            Service handle to the established connection,
 *                              \ref psa_handle_t
 * \param[in] type              The request type.
 *                              Must be zero( \ref PSA_IPC_CALL) or positive.
 * \param[in] inptr             Array of input psa_invec structures.
 *                              \ref psa_invec
 * \param[in] in_num            Number of input psa_invec structures.
 *                              \ref psa_invec
 * \param[in] outptr            Array of output psa_outvec structures.
 *                              \ref psa_outvec
 * \param[in] out_num           Number of outut psa_outvec structures.
 *                              \ref psa_outvec
 * \param[in] ns_caller         If 'true', call from non-secure client.
 *                              Otherwise from secure client.
 * \param[in] privileged        Privileged mode or unprivileged mode:
 *                              \ref TFM_PARTITION_UNPRIVILEGED_MODE
 *                              \ref TFM_PARTITION_PRIVILEGED_MODE
 *
 * \retval PSA_SUCCESS          Success.
 * \retval "Does not return"    The call is invalid, one or more of the
 *                              following are true:
 * \arg                           An invalid handle was passed.
 * \arg                           The connection is already handling a request.
 * \arg                           An invalid memory reference was provided.
 * \arg                           in_num + out_num > PSA_MAX_IOVEC.
 * \arg                           The message is unrecognized by the RoT
 *                                Service or incorrectly formatted.
 */
psa_status_t tfm_spm_client_psa_call(psa_handle_t handle, int32_t type,
                                     const psa_invec *inptr, size_t in_num,
                                     psa_outvec *outptr, size_t out_num,
                                     bool ns_caller, uint32_t privileged);

/**
 * \brief handler for \ref psa_close.
 *
 * \param[in] handle            Service handle to the connection to be closed,
 *                              \ref psa_handle_t
 * \param[in] ns_caller         If 'true', call from non-secure client.
 *                              Otherwise from secure client.
 *
 * \retval void                 Success.
 * \retval "Does not return"    The call is invalid, one or more of the
 *                              following are true:
 * \arg                           An invalid handle was provided that is not
 *                                the null handle.
 * \arg                           The connection is handling a request.
 */
void tfm_spm_client_psa_close(psa_handle_t handle, bool ns_caller);

/* PSA Partition API function body, for privileged use only. */

/**
 * \brief Function body of \ref psa_wait.
 *
 * \param[in] signal_mask       A set of signals to query. Signals that are not
 *                              in this set will be ignored.
 * \param[in] timeout           Specify either blocking \ref PSA_BLOCK or
 *                              polling \ref PSA_POLL operation.
 *
 * \retval >0                   At least one signal is asserted.
 * \retval 0                    No signals are asserted. This is only seen when
 *                              a polling timeout is used.
 */
psa_signal_t tfm_spm_partition_psa_wait(psa_signal_t signal_mask,
                                        uint32_t timeout);

/**
 * \brief Function body of \ref psa_get.
 *
 * \param[in] signal            The signal value for an asserted RoT Service.
 * \param[out] msg              Pointer to \ref psa_msg_t object for receiving
 *                              the message.
 *
 * \retval PSA_SUCCESS          Success, *msg will contain the delivered
 *                              message.
 * \retval PSA_ERROR_DOES_NOT_EXIST Message could not be delivered.
 * \retval "PROGRAMMER ERROR"   The call is invalid because one or more of the
 *                              following are true:
 * \arg                           signal has more than a single bit set.
 * \arg                           signal does not correspond to an RoT Service.
 * \arg                           The RoT Service signal is not currently
 *                                asserted.
 * \arg                           The msg pointer provided is not a valid memory
 *                                reference.
 */
psa_status_t tfm_spm_partition_psa_get(psa_signal_t signal, psa_msg_t *msg);

/**
 * \brief Function body of \ref psa_set_rhandle.
 *
 * \param[in] msg_handle        Handle for the client's message.
 * \param[in] rhandle           Reverse handle allocated by the RoT Service.
 *
 * \retval void                 Success, rhandle will be provided with all
 *                              subsequent messages delivered on this
 *                              connection.
 * \retval "PROGRAMMER ERROR"   msg_handle is invalid.
 */
void tfm_spm_partition_psa_set_rhandle(psa_handle_t msg_handle, void *rhandle);

/**
 * \brief Function body of \ref psa_read.
 *
 * \param[in] msg_handle        Handle for the client's message.
 * \param[in] invec_idx         Index of the input vector to read from. Must be
 *                              less than \ref PSA_MAX_IOVEC.
 * \param[out] buffer           Buffer in the Secure Partition to copy the
 *                              requested data to.
 * \param[in] num_bytes         Maximum number of bytes to be read from the
 *                              client input vector.
 *
 * \retval >0                   Number of bytes copied.
 * \retval 0                    There was no remaining data in this input
 *                              vector.
 * \retval "PROGRAMMER ERROR"   The call is invalid, one or more of the
 *                              following are true:
 * \arg                           msg_handle is invalid.
 * \arg                           msg_handle does not refer to a
 *                                \ref PSA_IPC_CALL message.
 * \arg                           invec_idx is equal to or greater than
 *                                \ref PSA_MAX_IOVEC.
 * \arg                           the memory reference for buffer is invalid or
 *                                not writable.
 */
size_t tfm_spm_partition_psa_read(psa_handle_t msg_handle, uint32_t invec_idx,
                                  void *buffer, size_t num_bytes);

/**
 * \brief Function body of psa_skip.
 *
 * \param[in] msg_handle        Handle for the client's message.
 * \param[in] invec_idx         Index of input vector to skip from. Must be
 *                              less than \ref PSA_MAX_IOVEC.
 * \param[in] num_bytes         Maximum number of bytes to skip in the client
 *                              input vector.
 *
 * \retval >0                   Number of bytes skipped.
 * \retval 0                    There was no remaining data in this input
 *                              vector.
 * \retval "PROGRAMMER ERROR"   The call is invalid, one or more of the
 *                              following are true:
 * \arg                           msg_handle is invalid.
 * \arg                           msg_handle does not refer to a request
 *                                message.
 * \arg                           invec_idx is equal to or greater than
 *                                \ref PSA_MAX_IOVEC.
 */
size_t tfm_spm_partition_psa_skip(psa_handle_t msg_handle, uint32_t invec_idx,
                                  size_t num_bytes);

/**
 * \brief Function body of \ref psa_write.
 *
 * \param[in] msg_handle        Handle for the client's message.
 * \param[out] outvec_idx       Index of output vector in message to write to.
 *                              Must be less than \ref PSA_MAX_IOVEC.
 * \param[in] buffer            Buffer with the data to write.
 * \param[in] num_bytes         Number of bytes to write to the client output
 *                              vector.
 *
 * \retval void                 Success
 * \retval "PROGRAMMER ERROR"   The call is invalid, one or more of the
 *                              following are true:
 * \arg                           msg_handle is invalid.
 * \arg                           msg_handle does not refer to a request
 *                                message.
 * \arg                           outvec_idx is equal to or greater than
 *                                \ref PSA_MAX_IOVEC.
 * \arg                           The memory reference for buffer is invalid.
 * \arg                           The call attempts to write data past the end
 *                                of the client output vector.
 */
void tfm_spm_partition_psa_write(psa_handle_t msg_handle, uint32_t outvec_idx,
                                 const void *buffer, size_t num_bytes);

/**
 * \brief Function body of \ref psa_reply.
 *
 * \param[in] msg_handle        Handle for the client's message.
 * \param[in] status            Message result value to be reported to the
 *                              client.
 *
 * \retval void                 Success.
 * \retval "PROGRAMMER ERROR"   The call is invalid, one or more of the
 *                              following are true:
 * \arg                         msg_handle is invalid.
 * \arg                         An invalid status code is specified for the
 *                              type of message.
 */
void tfm_spm_partition_psa_reply(psa_handle_t msg_handle, psa_status_t status);

/**
 * \brief Function body of \ref psa_norify.
 *
 * \param[in] partition_id      Secure Partition ID of the target partition.
 *
 * \retval void                 Success.
 * \retval "PROGRAMMER ERROR"   partition_id does not correspond to a Secure
 *                              Partition.
 */
void tfm_spm_partition_psa_notify(int32_t partition_id);

/**
 * \brief Function body of \ref psa_clear.
 *
 * \retval void                 Success.
 * \retval "PROGRAMMER ERROR"   The Secure Partition's doorbell signal is not
 *                              currently asserted.
 */
void tfm_spm_partition_psa_clear(void);

/**
 * \brief Function body of \ref psa_eoi.
 *
 * \param[in] irq_signal        The interrupt signal that has been processed.
 *
 * \retval void                 Success.
 * \retval "PROGRAMMER ERROR"   The call is invalid, one or more of the
 *                              following are true:
 * \arg                           irq_signal is not an interrupt signal.
 * \arg                           irq_signal indicates more than one signal.
 * \arg                           irq_signal is not currently asserted.
 * \arg                           The interrupt is not using SLIH.
 */
void tfm_spm_partition_psa_eoi(psa_signal_t irq_signal);

/**
 * \brief Function body of \ref psa_panic.
 *
 * \retval "Does not return"
 */
void tfm_spm_partition_psa_panic(void);

/**
 * \brief Function body of \ref psa_irq_enable.
 *
 * \param[in] irq_signal The signal for the interrupt to be enabled.
 *                       This must have a single bit set, which must be the
 *                       signal value for an interrupt in the calling Secure
 *                       Partition.
 *
 * \retval void
 * \retval "PROGRAMMER ERROR" If one or more of the following are true:
 * \arg                       \a irq_signal is not an interrupt signal.
 * \arg                       \a irq_signal indicates more than one signal.
 */
void tfm_spm_partition_irq_enable(psa_signal_t irq_signal);

/**
 * \brief Function body of psa_irq_disable.
 *
 * \param[in] irq_signal The signal for the interrupt to be disabled.
 *                       This must have a single bit set, which must be the
 *                       signal value for an interrupt in the calling Secure
 *                       Partition.
 *
 * \retval 0                  The interrupt was disabled prior to this call.
 *         1                  The interrupt was enabled prior to this call.
 * \retval "PROGRAMMER ERROR" If one or more of the following are true:
 * \arg                       \a irq_signal is not an interrupt signal.
 * \arg                       \a irq_signal indicates more than one signal.
 *
 * \note The current implementation always return 1. Do not use the return.
 */
psa_irq_status_t tfm_spm_partition_irq_disable(psa_signal_t irq_signal);

/**
 * \brief Function body of \ref psa_reset_signal.
 *
 * \param[in] irq_signal    The interrupt signal to be reset.
 *                          This must have a single bit set, corresponding to a
 *                          currently asserted signal for an interrupt that is
 *                          defined to use FLIH handling.
 *
 * \retval void
 * \retval "Programmer Error" if one or more of the following are true:
 * \arg                       \a irq_signal is not a signal for an interrupt
 *                            that is specified with FLIH handling in the Secure
 *                            Partition manifest.
 * \arg                       \a irq_signal indicates more than one signal.
 * \arg                       \a irq_signal is not currently asserted.
 */
void tfm_spm_partition_psa_reset_signal(psa_signal_t irq_signal);

#endif /* __PSA_API_H__ */