/*
 * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
 *
 * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
 *
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This file was originally distributed by Qualcomm Atheros, Inc.
 * under proprietary terms before Copyright ownership was assigned
 * to the Linux Foundation.
 */

#if !defined( __VOS_SCHED_H )
#define __VOS_SCHED_H

/**=========================================================================
  
  \file  vos_sched.h
  
  \brief virtual Operating System Servies (vOSS)
               
   Definitions for some of the internal data type that is internally used 
   by the vOSS scheduler on Windows Mobile.
   
   This file defines a vOSS message queue on Win Mobile and give some
   insights about how the scheduler implements the execution model supported
   by vOSS.
    
  
  ========================================================================*/

/*=========================================================================== 
    
                       EDIT HISTORY FOR FILE 
   
   
  This section contains comments describing changes made to the module. 
  Notice that changes are listed in reverse chronological order. 
   
   
  $Header:$ $DateTime: $ $Author: $ 
   
   
  when        who    what, where, why 
  --------    ---    --------------------------------------------------------
  09/15/08    lac    Removed hardcoded #define for VOS_TRACE.
  06/12/08    hba    Created module. 
     
===========================================================================*/ 

/*--------------------------------------------------------------------------
  Include Files
  ------------------------------------------------------------------------*/
#include <vos_event.h>
#include <vos_nvitem.h>
#include <vos_mq.h>
#include "i_vos_types.h"
#include "i_vos_packet.h"
#include <linux/wait.h>

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)) && \
	defined(WLAN_OPEN_SOURCE)
#include <linux/device.h>
#include <linux/pm_wakeup.h>
#else
#include <linux/wakelock.h>
#endif

#include <vos_timer.h>
#include <vos_api.h>


#define TX_POST_EVENT               0x000
#define TX_SUSPEND_EVENT            0x001
#define MC_POST_EVENT               0x000
#define MC_SUSPEND_EVENT            0x001
#define RX_POST_EVENT               0x000
#define RX_SUSPEND_EVENT            0x001
#define TX_SHUTDOWN_EVENT           0x002
#define MC_SHUTDOWN_EVENT           0x002
#define RX_SHUTDOWN_EVENT           0x002

#define WD_POST_EVENT               0x000
#define WD_SHUTDOWN_EVENT           0x001
#define WD_CHIP_RESET_EVENT         0x002
#define WD_WLAN_SHUTDOWN_EVENT      0x003
#define WD_WLAN_REINIT_EVENT        0x004
#define WD_WLAN_DETECT_THREAD_STUCK 0x005


/*
** Maximum number of messages in the system
** These are buffers to account for all current messages 
** with some accounting of what we think is a 
** worst-case scenario.  Must be able to handle all
** incoming frames, as well as overhead for internal
** messaging
*/
#define VOS_CORE_MAX_MESSAGES           (VPKT_NUM_RX_RAW_PACKETS + 32)


/*
** vOSS Message queue definition.
*/
typedef struct _VosMqType
{
  /* Lock use to synchronize access to this message queue */
  spinlock_t       mqLock;

  /* List of vOS Messages waiting on this queue */
  struct list_head  mqList;

} VosMqType, *pVosMqType;


/*
** vOSS Scheduler context
** The scheduler context contains the following:
**   ** the messages queues
**   ** the handle to the tread
**   ** pointer to the events that gracefully shutdown the MC and Tx threads
**    
*/
typedef struct _VosSchedContext
{
  /* Place holder to the VOSS Context */ 
   v_PVOID_t           pVContext; 
  /* WDA Message queue on the Main thread*/
   VosMqType           wdaMcMq;


   /* PE Message queue on the Main thread*/
   VosMqType           peMcMq;

   /* SME Message queue on the Main thread*/
   VosMqType           smeMcMq;

   /* TL Message queue on the Main thread */
   VosMqType           tlMcMq;

   /* SYS Message queue on the Main thread */
   VosMqType           sysMcMq;

  /* WDI Message queue on the Main thread*/
   VosMqType           wdiMcMq;

   /* WDI Message queue on the Tx Thread*/
   VosMqType           wdiTxMq;

   /* WDI Message queue on the Rx Thread*/
   VosMqType           wdiRxMq;

   /* TL Message queue on the Tx thread */
   VosMqType           tlTxMq;

   /* TL Message queue on the Rx thread */
   VosMqType           tlRxMq;

   /* SYS Message queue on the Tx thread */
   VosMqType           sysTxMq;

   VosMqType           sysRxMq;

   /* Handle of Event for MC thread to signal startup */
   struct completion   McStartEvent;

   /* Handle of Event for Tx thread to signal startup */
   struct completion   TxStartEvent;

   /* Handle of Event for Rx thread to signal startup */
   struct completion   RxStartEvent;

   struct task_struct* McThread;

   /* TX Thread handle */
   
   struct task_struct*   TxThread;

   /* RX Thread handle */
   struct task_struct*   RxThread;


   /* completion object for MC thread shutdown */
   struct completion   McShutdown; 

   /* completion object for Tx thread shutdown */
   struct completion   TxShutdown; 

   /* completion object for Rx thread shutdown */
   struct completion   RxShutdown;

   /* Wait queue for MC thread */
   wait_queue_head_t mcWaitQueue;

   unsigned long     mcEventFlag;

   /* Wait queue for Tx thread */
   wait_queue_head_t txWaitQueue;

   unsigned long     txEventFlag;

   /* Wait queue for Rx thread */
   wait_queue_head_t rxWaitQueue;

   unsigned long     rxEventFlag;
   
   /* Completion object to resume Mc thread */
   struct completion ResumeMcEvent;

   /* Completion object to resume Tx thread */
   struct completion ResumeTxEvent;

   /* Completion object to resume Rx thread */
   struct completion ResumeRxEvent;

   /* lock to make sure that McThread and TxThread Suspend/resume mechanism is in sync*/
   spinlock_t McThreadLock;
   spinlock_t TxThreadLock;
   spinlock_t RxThreadLock;

} VosSchedContext, *pVosSchedContext;

/*
** VOSS watchdog context
** The watchdog context contains the following:
** The messages queues and events
** The handle to the thread
**    
*/
typedef struct _VosWatchdogContext
{

   /* Place holder to the VOSS Context */ 
   v_PVOID_t pVContext; 

   /* Handle of Event for Watchdog thread to signal startup */
   struct completion WdStartEvent;

   /* Watchdog Thread handle */
  
   struct task_struct* WdThread;

   /* completion object for Watchdog thread shutdown */
   struct completion WdShutdown; 

   /* Wait queue for Watchdog thread */
   wait_queue_head_t wdWaitQueue;

   /* Event flag for events handled by Watchdog */
   unsigned long wdEventFlag;

   v_BOOL_t resetInProgress;

   v_BOOL_t isFatalError;

   /* Lock for preventing multiple reset being triggered simultaneously */
   spinlock_t wdLock;
   /* Timer to detect thread stuck issue */
   vos_timer_t threadStuckTimer;
   /* Count for each thread to determine thread stuck */
   unsigned int mcThreadStuckCount;
   unsigned int txThreadStuckCount;
   unsigned int rxThreadStuckCount;
   /* lock to synchronize access to the thread stuck counts */
   spinlock_t thread_stuck_lock;

} VosWatchdogContext, *pVosWatchdogContext;

/*
** vOSS Sched Msg Wrapper
** Wrapper messages so that they can be chained to their respective queue
** in the scheduler.
*/
typedef struct _VosMsgWrapper
{
   /* Message node */
   struct list_head  msgNode;

   /* the Vos message it is associated to */
   vos_msg_t    *pVosMsg;

} VosMsgWrapper, *pVosMsgWrapper;


typedef struct vos_wdthread_timer_work {
   vos_timer_callback_t callback;
   v_PVOID_t userData;
   struct list_head node;
}vos_wdthread_timer_work_t;

typedef struct _VosContextType
{                                                  
   /* Messages buffers */
   vos_msg_t           aMsgBuffers[VOS_CORE_MAX_MESSAGES];

   VosMsgWrapper       aMsgWrappers[VOS_CORE_MAX_MESSAGES];
   
   /* Free Message queue*/
   VosMqType           freeVosMq;

   /* Scheduler Context */
   VosSchedContext     vosSched;

   /* Watchdog Context */
   VosWatchdogContext  vosWatchdog;

   /* HDD Module Context  */
   v_VOID_t           *pHDDContext;

   /* HDD SoftAP Module Context  */
   v_VOID_t           *pHDDSoftAPContext;

   /* TL Module Context  */
   v_VOID_t           *pTLContext;

   /* MAC Module Context  */
   v_VOID_t           *pMACContext;

   /* BAP Context */
   v_VOID_t           *pBAPContext;

   /* SAP Context */
   v_VOID_t           *pSAPContext;
   
   /* VOS Packet Context */
   vos_pkt_context_t   vosPacket; 

   vos_event_t         ProbeEvent;

   volatile v_U8_t     isLogpInProgress;

   vos_event_t         wdaCompleteEvent;

   /* WDA Context */
   v_VOID_t            *pWDAContext;

   volatile v_U8_t    isLoadUnloadInProgress;

   /* SSR re-init in progress */
   volatile v_U8_t     isReInitInProgress;

   /* NV BIN Version */
   eNvVersionType     nvVersion;

   /* Roam delay statistic enabled in ini*/
   v_U8_t             roamDelayStatsEnabled;

   /*Fw log complete Event*/
   vos_event_t fwLogsComplete;
   v_U32_t wakelock_log_level;
   v_U32_t connectivity_log_level;
   v_U32_t packet_stats_log_level;
   v_U8_t      vosWrapperFullReported;
   vos_wdthread_timer_work_t wdthread_timer_work;
   struct list_head wdthread_timer_work_list;
   struct work_struct wdthread_work;
   spinlock_t wdthread_work_lock;
   bool snoc_high_freq_voting;
   spinlock_t freq_voting_lock;
   enum vos_hang_reason recovery_reason;
} VosContextType, *pVosContextType;


/*--------------------------------------------------------------------------- 
  Function declarations and documenation
---------------------------------------------------------------------------*/
 
int vos_sched_is_tx_thread(int threadID);
int vos_sched_is_rx_thread(int threadID);
int vos_sched_is_mc_thread(int threadID);
void vos_thread_stuck_timer_init(pVosWatchdogContext pWdContext);

/*---------------------------------------------------------------------------
  
  \brief vos_sched_open() - initialize the vOSS Scheduler  
    
  The \a vos_sched_open() function initializes the vOSS Scheduler
  Upon successful initialization:
  
     - All the message queues are initialized
     
     - The Main Controller thread is created and ready to receive and
       dispatch messages.
     
     - The Tx thread is created and ready to receive and dispatch messages
      
  
  \param  pVosContext - pointer to the global vOSS Context
  
  \param  pVosSchedContext - pointer to a previously allocated buffer big
          enough to hold a scheduler context.       
  \
  
  \return VOS_STATUS_SUCCESS - Scheduler was successfully initialized and 
          is ready to be used.
  
          VOS_STATUS_E_RESOURCES - System resources (other than memory) 
          are unavailable to initilize the scheduler

          VOS_STATUS_E_NOMEM - insufficient memory exists to initialize 
          the scheduler
          
          VOS_STATUS_E_INVAL - Invalid parameter passed to the scheduler Open
          function 
          
          VOS_STATUS_E_FAILURE - Failure to initialize the scheduler/   
          
  \sa vos_sched_open()
  
  -------------------------------------------------------------------------*/
VOS_STATUS vos_sched_open( v_PVOID_t pVosContext, 
                           pVosSchedContext pSchedCxt,
                           v_SIZE_t SchedCtxSize);

/*---------------------------------------------------------------------------
  
  \brief vos_watchdog_open() - initialize the vOSS watchdog  
    
  The \a vos_watchdog_open() function initializes the vOSS watchdog. Upon successful 
        initialization, the watchdog thread is created and ready to receive and  process messages.
     
   
  \param  pVosContext - pointer to the global vOSS Context
  
  \param  pWdContext - pointer to a previously allocated buffer big
          enough to hold a watchdog context.       

  \return VOS_STATUS_SUCCESS - Watchdog was successfully initialized and 
          is ready to be used.
  
          VOS_STATUS_E_RESOURCES - System resources (other than memory) 
          are unavailable to initilize the Watchdog

          VOS_STATUS_E_NOMEM - insufficient memory exists to initialize 
          the Watchdog
          
          VOS_STATUS_E_INVAL - Invalid parameter passed to the Watchdog Open
          function 
          
          VOS_STATUS_E_FAILURE - Failure to initialize the Watchdog/   

  \sa vos_watchdog_open()
  
  -------------------------------------------------------------------------*/

VOS_STATUS vos_watchdog_open

(
  v_PVOID_t           pVosContext,
  pVosWatchdogContext pWdContext,
  v_SIZE_t            wdCtxSize
);

/*---------------------------------------------------------------------------
  
  \brief vos_sched_close() - Close the vOSS Scheduler  
    
  The \a vos_sched_closes() function closes the vOSS Scheduler
  Upon successful closing:
  
     - All the message queues are flushed
     
     - The Main Controller thread is closed
     
     - The Tx thread is closed
      
  
  \param  pVosContext - pointer to the global vOSS Context
  
  \return VOS_STATUS_SUCCESS - Scheduler was successfully initialized and 
          is ready to be used.
          
          VOS_STATUS_E_INVAL - Invalid parameter passed to the scheduler Open
          function 
          
          VOS_STATUS_E_FAILURE - Failure to initialize the scheduler/   
          
  \sa vos_sched_close()
  
---------------------------------------------------------------------------*/
VOS_STATUS vos_sched_close( v_PVOID_t pVosContext);

/*---------------------------------------------------------------------------
  
  \brief vos_watchdog_close() - Close the vOSS Watchdog  
    
  The \a vos_watchdog_close() function closes the vOSS Watchdog
  Upon successful closing:
  
     - The Watchdog thread is closed
     
      
  \param  pVosContext - pointer to the global vOSS Context
  
  \return VOS_STATUS_SUCCESS - Watchdog was successfully initialized and 
          is ready to be used.
          
          VOS_STATUS_E_INVAL - Invalid parameter passed 
          
          VOS_STATUS_E_FAILURE - Failure to initialize the Watchdog/   
          
  \sa vos_watchdog_close()
  
---------------------------------------------------------------------------*/
VOS_STATUS vos_watchdog_close ( v_PVOID_t pVosContext );

/* Helper routines provided to other VOS API's */
VOS_STATUS vos_mq_init(pVosMqType pMq);
void vos_mq_deinit(pVosMqType pMq);
void vos_mq_put(pVosMqType pMq, pVosMsgWrapper pMsgWrapper);
void vos_mq_put_front(pVosMqType pMq, pVosMsgWrapper pMsgWrapper);
pVosMsgWrapper vos_mq_get(pVosMqType pMq);
v_BOOL_t vos_is_mq_empty(pVosMqType pMq);
pVosSchedContext get_vos_sched_ctxt(void);
pVosWatchdogContext get_vos_watchdog_ctxt(void);
VOS_STATUS vos_sched_init_mqs   (pVosSchedContext pSchedContext);
void vos_sched_deinit_mqs (pVosSchedContext pSchedContext);
void vos_sched_flush_mc_mqs  (pVosSchedContext pSchedContext);
void vos_sched_flush_tx_mqs  (pVosSchedContext pSchedContext);
void vos_sched_flush_rx_mqs  (pVosSchedContext pSchedContext);
void clearWlanResetReason(void);

void vos_timer_module_init( void );
VOS_STATUS vos_watchdog_wlan_shutdown(void);
VOS_STATUS vos_watchdog_wlan_re_init(void);
v_BOOL_t isSsrPanicOnFailure(void);
void vos_ssr_protect(const char *caller_func);
void vos_ssr_unprotect(const char *caller_func);
void vos_wd_reset_thread_stuck_count(int threadId);
bool vos_is_wd_thread(int threadId);
void vos_dump_stack(uint8_t value);
void vos_dump_thread_stacks(int threadId);

#endif // #if !defined __VOSS_SCHED_H