154 lines
5.8 KiB
C
154 lines
5.8 KiB
C
/*
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* Copyright (c) 2014-2015 TRUSTONIC LIMITED
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _TUI_HAL_H_
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#define _TUI_HAL_H_
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#include <linux/types.h>
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#include "tui_ioctl.h"
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/**
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* hal_tui_init() - integrator specific initialization for kernel module
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*
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* This function is called when the kernel module is initialized, either at
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* boot time, if the module is built statically in the kernel, or when the
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* kernel is dynamically loaded if the module is built as a dynamic kernel
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* module. This function may be used by the integrator, for instance, to get a
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* memory pool that will be used to allocate the secure framebuffer and work
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* buffer for TUI sessions.
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*
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* Return: must return 0 on success, or non-zero on error. If the function
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* returns an error, the module initialization will fail.
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*/
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uint32_t hal_tui_init(void);
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/**
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* hal_tui_exit() - integrator specific exit code for kernel module
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*
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* This function is called when the kernel module exit. It is called when the
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* kernel module is unloaded, for a dynamic kernel module, and never called for
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* a module built into the kernel. It can be used to free any resources
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* allocated by hal_tui_init().
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*/
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void hal_tui_exit(void);
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/**
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* hal_tui_alloc() - allocator for secure framebuffer and working buffer
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* @allocbuffer: input parameter that the allocator fills with the physical
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* addresses of the allocated buffers
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* @allocsize: size of the buffer to allocate. All the buffer are of the
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* same size
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* @number: Number to allocate.
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*
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* This function is called when the module receives a CMD_TUI_SW_OPEN_SESSION
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* message from the secure driver. The function must allocate 'number'
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* buffer(s) of physically contiguous memory, where the length of each buffer
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* is at least 'allocsize' bytes. The physical address of each buffer must be
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* stored in the array of structure 'allocbuffer' which is provided as
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* arguments.
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*
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* Physical address of the first buffer must be put in allocate[0].pa , the
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* second one on allocbuffer[1].pa, and so on. The function must return 0 on
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* success, non-zero on error. For integrations where the framebuffer is not
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* allocated by the Normal World, this function should do nothing and return
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* success (zero).
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* If the working buffer allocation is different from framebuffers, ensure that
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* the physical address of the working buffer is at index 0 of the allocbuffer
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* table (allocbuffer[0].pa).
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*/
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uint32_t hal_tui_alloc(
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struct tui_alloc_buffer_t allocbuffer[MAX_DCI_BUFFER_NUMBER],
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size_t allocsize, uint32_t number);
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/**
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* hal_tui_free() - free memory allocated by hal_tui_alloc()
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*
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* This function is called at the end of the TUI session, when the TUI module
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* receives the CMD_TUI_SW_CLOSE_SESSION message. The function should free the
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* buffers allocated by hal_tui_alloc(...).
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*/
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void hal_tui_free(void);
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void hal_tui_post_start(struct tlc_tui_response_t *rsp);
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/**
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* hal_tui_deactivate() - deactivate Normal World display and input
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*
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* This function should stop the Normal World display and, if necessary, Normal
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* World input. It is called when a TUI session is opening, before the Secure
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* World takes control of display and input.
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*
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* Return: must return 0 on success, non-zero otherwise.
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*/
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uint32_t hal_tui_deactivate(void);
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/**
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* hal_tui_activate() - restore Normal World display and input after a TUI
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* session
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*
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* This function should enable Normal World display and, if necessary, Normal
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* World input. It is called after a TUI session, after the Secure World has
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* released the display and input.
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*
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* Return: must return 0 on success, non-zero otherwise.
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*/
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uint32_t hal_tui_activate(void);
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uint32_t hal_tui_process_cmd(struct tui_hal_cmd_t *cmd,
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struct tui_hal_rsp_t *rsp);
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uint32_t hal_tui_notif(void);
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/**
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* hal_tui_process_cmd() - integrator specific exit code for kernel module
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*
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* This function is called when kernel module receives a command from the
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* secure driver HAL, ie when drTuiCoreDciSendAndWait() is called.
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*/
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uint32_t hal_tui_process_cmd(struct tui_hal_cmd_t *cmd,
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struct tui_hal_rsp_t *rsp);
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/**
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* hal_tui_notif() - integrator specific exit code for kernel module
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*
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* This function is called when kernel module receives an answer from the
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* secure driver HAL (the hal_rsp field of the world shared memory struct is
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* not null).
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* This should be the way to get an answer from the secure driver after a
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* command has been sent to it (the hal_cmd field of the world shared memory
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* struct has been set and a notification has been raised).
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*/
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uint32_t hal_tui_notif(void);
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/**
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* hal_tui_process_cmd() - integrator specific exit code for kernel module
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*
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* This function is called when kernel module receives a command from the
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* secure driver HAL, ie when drTuiCoreDciSendAndWait() is called.
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*/
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uint32_t hal_tui_process_cmd(struct tui_hal_cmd_t *cmd,
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struct tui_hal_rsp_t *rsp);
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/**
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* hal_tui_notif() - integrator specific exit code for kernel module
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*
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* This function is called when kernel module receives an answer from the
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* secure driver HAL (the hal_rsp field of the world shared memory struct is
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* not null).
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* This should be the way to get an answer from the secure driver after a
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* command has been sent to it (the hal_cmd field of the world shared memory
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* struct has been set and a notification has been raised).
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*/
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uint32_t hal_tui_notif(void);
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#endif
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