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300 lines
10 KiB
300 lines
10 KiB
/*
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* Copyright (c) 2012, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you
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* may not use this file except in compliance with the License. You may
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* obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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#ifndef __QSEECOMAPI_H_
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#define __QSEECOMAPI_H_
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/*----------------------------------------------------------------------------
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* Include Files
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* -------------------------------------------------------------------------*/
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#include <stdint.h>
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#include <stdbool.h>
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#define QSEECOM_ALIGN_SIZE 0x40
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#define QSEECOM_ALIGN_MASK (QSEECOM_ALIGN_SIZE - 1)
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#define QSEECOM_ALIGN(x) \
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((x + QSEECOM_ALIGN_SIZE) & (~QSEECOM_ALIGN_MASK))
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*----------------------------------------------------------------------------
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* Preprocessor Definitions and Constants
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* -------------------------------------------------------------------------*/
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/** The memory is locked and non-pageable */
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#define MEM_LOCKED 0x00000001
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/** The memory is marked non-cacheable */
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#define MEM_NON_CACHED 0x00000002
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#define QSEECOM_APP_QUERY_FAILED -6
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#define QSEECOM_APP_NOT_LOADED -5
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#define QSEECOM_APP_ALREADY_LOADED -4
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#define QSEECOM_LISTENER_UNREGISTERED -3
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#define QSEECOM_LISTENER_ALREADY_REGISTERED -2
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#define QSEECOM_LISTENER_REGISTER_FAIL -1
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/*----------------------------------------------------------------------------
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* Type Declarations
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* -------------------------------------------------------------------------*/
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struct QSEECom_handle {
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unsigned char *ion_sbuffer;
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};
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struct QSEECom_ion_fd_data {
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int32_t fd;
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uint32_t cmd_buf_offset;
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};
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struct QSEECom_ion_fd_info {
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struct QSEECom_ion_fd_data data[4];
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};
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/*----------------------------------------------------------------------------
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* Function Declarations and Documentation
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* -------------------------------------------------------------------------*/
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/**
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* @brief Open a handle to the QSEECom device.
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*
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* - Load a secure application. The application will be verified that it is
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* secure by digital signature verification.
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* Allocate memory for sending requests to the QSAPP
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*
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* Note/Comments:
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* There is a one-to-one relation for a HLOS client and a QSAPP;
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* meaning that only one app can communicate to a QSAPP at a time.
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*
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* Please note that there is difference between an application and a listener
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* service. A QSAPP must be loaded at the request of the HLOS,
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* and all requests are orginated by the HLOS client.
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* A listener service on the otherhand is started during start-up by a
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* daemon, qseecomd.
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*
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* A HLOS application may create mutiple handles to the QSAPP
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*
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* @param[in/out] handle The device handle
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* @param[in] fname The directory and filename to load.
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* @param[in] sb_size Size of the shared buffer memory for sending requests.
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_start_app(struct QSEECom_handle **clnt_handle, const char *path,
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const char *fname, uint32_t sb_size);
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/**
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* @brief Close the application associated with the handle.
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*
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* - Unload a secure application. The driver will verify if there exists
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* any other applications that are communicating with the QSAPP to which
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* the "handle" is tied.
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* - De-allocate memory for sending requests to QSAPP.
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*
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* @param[in] handle The device handle
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_shutdown_app(struct QSEECom_handle **handle);
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/**
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* @brief Open a handle to the QSEECom device.
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*
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* - Load an external elf. The elf will be verified that it is
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* secure by digital signature verification.
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*
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* A HLOS application may create mutiple opens (only one is permitted for the
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* app, but each listener service can open a unique device in the same HLOS app
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* /executable.
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* @param[in/out] handle The device handle
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* @param[in] fname The directory and filename to load.
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_load_external_elf(struct QSEECom_handle **clnt_handle, const char *path,
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const char *fname);
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/**
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* @brief Close the external elf
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*
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* - Unload an external elf.
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*
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* @param[in] handle The device handle
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_unload_external_elf(struct QSEECom_handle **handle);
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/**
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* @brief Register an HLOS listener service. This allows messages from QSAPP
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* to be received.
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*
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* @param[in] handle The device handle
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* @param[in] lstnr_id The listener service identifier. This ID must be uniquely
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* assigned to avoid any collisions.
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* @param[in] sb_length Shared memory buffer between OS and QSE.
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* @param[in] flags Provide the shared memory flags attributes.
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*
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*/
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int QSEECom_register_listener(struct QSEECom_handle **handle,
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uint32_t lstnr_id, uint32_t sb_length, uint32_t flags);
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/**
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* @brief Unregister a listener service.
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*
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* @param[in] handle The device handle
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_unregister_listener(struct QSEECom_handle *handle);
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/**
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* @brief Send QSAPP a "user" defined buffer (may contain some message/
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* command request) and receives a response from QSAPP in receive buffer.
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* The HLOS client writes to the send_buf, where QSAPP writes to the rcv_buf.
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* This is a blocking call.
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*
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* @param[in] handle The device handle
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* @param[in] send_buf The buffer to be sent.
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* If using ion_sbuffer, ensure this
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* QSEECOM_BUFFER_ALIGN'ed.
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* @param[in] sbuf_len The send buffer length
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* If using ion_sbuffer, ensure length is
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* multiple of QSEECOM_BUFFER_ALIGN.
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* @param[in] rcv_buf The QSEOS returned buffer.
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* If using ion_sbuffer, ensure this is
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* QSEECOM_BUFFER_ALIGN'ed.
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* @param[in] rbuf_len The returned buffer length.
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* If using ion_sbuffer, ensure length is
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* multiple of QSEECOM_BUFFER_ALIGN.
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* @param[in] rbuf_len The returned buffer length.
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_send_cmd(struct QSEECom_handle *handle, void *send_buf,
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uint32_t sbuf_len, void *rcv_buf, uint32_t rbuf_len);
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/**
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* @brief Send QSAPP a "user" defined buffer (may contain some message/
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* command request) and receives a response from QSAPP in receive buffer.
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* This API is same as send_cmd except it takes in addition parameter,
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* "ifd_data". This "ifd_data" holds information (ion fd handle and
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* cmd_buf_offset) used for modifying data in the message in send_buf
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* at an offset. Essentailly, it has the ion fd handle information to
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* retrieve physical address and modify the message in send_buf at the
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* mentioned offset.
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*
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* The HLOS client writes to the send_buf, where QSAPP writes to the rcv_buf.
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* This is a blocking call.
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*
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* @param[in] handle The device handle
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* @param[in] send_buf The buffer to be sent.
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* If using ion_sbuffer, ensure this
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* QSEECOM_BUFFER_ALIGN'ed.
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* @param[in] sbuf_len The send buffer length
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* If using ion_sbuffer, ensure length is
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* multiple of QSEECOM_BUFFER_ALIGN.
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* @param[in] rcv_buf The QSEOS returned buffer.
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* If using ion_sbuffer, ensure this is
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* QSEECOM_BUFFER_ALIGN'ed.
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* @param[in] rbuf_len The returned buffer length.
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* If using ion_sbuffer, ensure length is
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* multiple of QSEECOM_BUFFER_ALIGN.
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* @param[in] QSEECom_ion_fd_info data related to memory allocated by ion.
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_send_modified_cmd(struct QSEECom_handle *handle, void *send_buf,
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uint32_t sbuf_len, void *resp_buf, uint32_t rbuf_len,
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struct QSEECom_ion_fd_info *ifd_data);
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/**
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* @brief Receive a service defined buffer.
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*
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* @param[in] handle The device handle
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* @param[out] buf The buffer that is received
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* @param[in] len The receive buffer length
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_receive_req(struct QSEECom_handle *handle,
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void *buf, uint32_t len);
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/**
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* @brief Send a response based on the previous QSEECom_receive_req.
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*
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* This allows a listener service to receive a command (e.g. read file abc).
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* The service can then handle the request from QSEECom_receive_req, and provide
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* that information back to QSAPP.
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*
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* This allows the HLOS to act as the server and QSAPP to behave as the client.
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*
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* @param[in] handle The device handle
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* @param[out] send_buf The buffer to be returned back to QSAPP
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* @param[in] len The send buffer length
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_send_resp(struct QSEECom_handle *handle,
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void *send_buf, uint32_t len);
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/**
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* @brief Set the bandwidth for QSEE.
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*
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* This API resulst in improving the performance on the Crypto hardware
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* in QSEE. It should be called before issuing send_cmd/send_modified_cmd
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* for commands that requires using the crypto hardware on the QSEE.
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* Typically this API should be called before issuing the send request to
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* enable high performance mode and after completion of the send_cmd to
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* resume to low performance and hence to low power mode.
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*
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* This allows the clients of QSEECom to set the QSEE cyptpo HW bus
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* bandwidth to high/low.
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*
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* @param[in] high Set to 1 to enable bandwidth.
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*
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* @return Zero on success, negative on failure. errno will be set on
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* error.
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*/
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int QSEECom_set_bandwidth(struct QSEECom_handle *handle, bool high);
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/**
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* @brief Query QSEE to check if app is loaded.
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*
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* This API queries QSEE to see if the app is loaded or not.
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*
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* @param[in] app_name Name of the app.
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*
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* @return QSEECOM_APP_QUERY_FAILED/QSEECOM_APP_NOT_LOADED/QSEECOM_APP_LOADED.
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*/
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int QSEECom_app_load_query(struct QSEECom_handle *handle, char *app_name);
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#ifdef __cplusplus
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}
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#endif
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#endif
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