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/*
* Copyright (C) 2010-2011 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* @file mali_kernel_subsystem.h
*/
#ifndef __MALI_KERNEL_SUBSYSTEM_H__
#define __MALI_KERNEL_SUBSYSTEM_H__
#include "mali_osk.h"
#include "mali_uk_types.h"
#include "mali_kernel_common.h"
#include "mali_kernel_session_manager.h"
/* typedefs of the datatypes used in the hook functions */
typedef void * mali_kernel_subsystem_session_slot;
typedef int mali_kernel_subsystem_identifier;
typedef _mali_osk_errcode_t (*mali_kernel_resource_registrator)(_mali_osk_resource_t *);
/**
* Broadcast notification messages
*/
typedef enum mali_core_notification_message
{
MMU_KILL_STEP0_LOCK_SUBSYSTEM, /**< Request to lock subsystem */
MMU_KILL_STEP1_STOP_BUS_FOR_ALL_CORES, /**< Request to stop all buses */
MMU_KILL_STEP2_RESET_ALL_CORES_AND_ABORT_THEIR_JOBS, /**< Request kill all jobs, and not start more jobs */
MMU_KILL_STEP3_CONTINUE_JOB_HANDLING, /**< Request to continue with new jobs on all cores */
MMU_KILL_STEP4_UNLOCK_SUBSYSTEM /**< Request to unlock subsystem */
} mali_core_notification_message;
/**
* A function pointer can be NULL if the subsystem isn't interested in the event.
*/
typedef struct mali_kernel_subsystem
{
/* subsystem control */
_mali_osk_errcode_t (*startup)(mali_kernel_subsystem_identifier id); /**< Called during module load or system startup*/
void (*shutdown)(mali_kernel_subsystem_identifier id); /**< Called during module unload or system shutdown */
/**
* Called during module load or system startup.
* Called when all subsystems have reported startup OK and all resources where successfully initialized
*/
_mali_osk_errcode_t (*load_complete)(mali_kernel_subsystem_identifier id);
/* per subsystem handlers */
_mali_osk_errcode_t (*system_info_fill)(_mali_system_info* info); /**< Fill info into info struct. MUST allocate memory with kmalloc, since it's kfree'd */
/* per session handlers */
/**
* Informs about a new session.
* slot can be used to track per-session per-subsystem data.
* queue can be used to send events to user space.
* _mali_osk_errcode_t error return value.
*/
_mali_osk_errcode_t (*session_begin)(struct mali_session_data * mali_session_data, mali_kernel_subsystem_session_slot * slot, _mali_osk_notification_queue_t * queue);
/**
* Informs that a session is ending
* slot was the same as given during session_begin
*/
void (*session_end)(struct mali_session_data * mali_session_data, mali_kernel_subsystem_session_slot * slot);
/* Used by subsystems to send messages to each other. This is the receiving end */
void (*broadcast_notification)(mali_core_notification_message message, u32 data);
#if MALI_STATE_TRACKING
/** Dump the current state of the subsystem */
void (*dump_state)(void);
#endif
} mali_kernel_subsystem;
/* functions used by the subsystems to interact with the core */
/**
* Register a resouce handler
* @param type The resoruce type to register a handler for
* @param handler Pointer to the function handling this resource
* @return _MALI_OSK_ERR_OK on success. Otherwise, a suitable _mali_osk_errcode_t error.
*/
_mali_osk_errcode_t _mali_kernel_core_register_resource_handler(_mali_osk_resource_type_t type, mali_kernel_resource_registrator handler);
/* function used to interact with other subsystems */
/**
* Broadcast a message
* Sends a message to all subsystems which have registered a broadcast notification handler
* @param message The message to send
* @param data Message specific extra data
*/
void _mali_kernel_core_broadcast_subsystem_message(mali_core_notification_message message, u32 data);
#if MALI_STATE_TRACKING
/**
* Tell all subsystems to dump their current state
*/
void _mali_kernel_core_dump_state(void);
#endif
#endif /* __MALI_KERNEL_SUBSYSTEM_H__ */
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