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view src/g23m-aci/aci/cmh_psi.h @ 220:0ed36de51973

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ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents fa8dc04885d8
children
line wrap: on
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GSM-PS (6147)
|  Modul   :  CMH_PKTIO
+----------------------------------------------------------------------------- 
|  Copyright 2002 Texas Instruments Berlin, AG 
|                 All rights reserved. 
| 
|                 This file is confidential and a trade secret of Texas 
|                 Instruments Berlin, AG 
|                 The receipt of or possession of this file does not convey 
|                 any rights to reproduce or disclose its contents or to 
|                 manufacture, use, or sell anything it may describe, in 
|                 whole, or in part, without the specific written consent of 
|                 Texas Instruments Berlin, AG. 
+----------------------------------------------------------------------------- 
|  Purpose :  Definitions for the command handler of the 
|             psi managment.
+----------------------------------------------------------------------------- 
*/ 
#ifdef FF_PSI

#ifndef CMH_PSI_H
#define CMH_PSI_H


#include "aci_lst.h"

/*==== CONSTANTS ==================================================*/
  
#define ACI_DIO_ID_MASK 0x0000FF00  /* bit 08-15: device combination id from DIO Interface layer, v4 */

/*==== TYPES ======================================================*/
typedef enum{
   PSI_DTI_CLS_CNF,
   PSI_DTI_CLS_IND
}T_PSI_DTI_CLS_TYP;

typedef union
{
  T_DIO_CAP_SER             dio_cap_ser;    
  T_DIO_CAP_SER_MUX         dio_cap_ser_mux;   
  T_DIO_CAP_PKT             dio_cap_pkt;       
} T_DIO_CAP_PSI;
typedef T_DIO_CAP_PSI T_ACI_PSI_CAP_PAR;

typedef union 
{
  T_DIO_DCB_SER  dio_cap_ser;
  T_DIO_DCB_SER_MUX  dio_cap_ser_mux;
  T_DIO_DCB_PKT  dio_cap_pkt;
} T_ACI_PSI_CAP;

typedef union 
{
  T_DIO_DCB_SER  dio_dcb_ser;
  T_DIO_DCB_SER_MUX  dio_dcb_ser_mux;
  T_DIO_DCB_PKT  dio_dcb_pkt;
} T_ACI_PSI_DCB_PAR; 

typedef struct {
  U32               devId;
 T_ACI_PSI_DCB_PAR  dcbPar;
} T_ACI_DEVICE_DCB_ENTRY;

typedef struct
{
    U32 devId;
    T_ACI_PSI_CAP_PAR psi_cap;
    U8 psi_data_mode;
} T_ACI_PSI;

typedef struct
{
  UBYTE               src_id;
  T_DTI_ENTITY_ID     entity_to_conn;
  UBYTE               num_entities;
  T_DTI_CONN_MODE     mode;
  T_DTI_CONN_CB*      cb;
  UBYTE               capability;
  UBYTE               cid;
  T_ACI_AT_CMD        last_cmd;
}T_ACI_PSI_CALL_TYPE;

/*==== PROTOTYPES =================================================*/
EXTERN void cmhPSI_DTI_OpenCnf (U32 devId, U32 link_id, T_DTI_CONN_RESULT result);
EXTERN void cmhPSI_DTI_Close (U32 devId, T_PSI_DTI_CLS_TYP  state, U32 link_id);
EXTERN void cmhPSI_Line_State_Ind (U32 devId, U16 line_state);
EXTERN BOOL cmhPSItest_srcId( UBYTE srcId, void *elem);
EXTERN void cmhPSI_getdata ( T_ACI_CMD_SRC srcId );

EXTERN BOOL cmhPSItest_device (U32 devId, void *elem);
EXTERN void cmhPSI_AddDeviceToDcbParameter( U32 devId, U32 dio_driver_type);
EXTERN void cmhPSI_erase_src_elem(UBYTE srcId);
EXTERN void cmhPSI_RemoveDeviceFromDcbParameter( U32 devId );
EXTERN void cmhPSI_CleanDcbParameterList( void );
EXTERN T_ACI_DEVICE_DCB_ENTRY* cmhPSI_GetDcbParOverDevice( U32 devId );
EXTERN T_ACI_DEVICE_DCB_ENTRY* cmhPSI_GetDeviceParOverSrcID( UBYTE srcId );
EXTERN UBYTE cmhPSI_GetParityOverSrcID( UBYTE srcId );
EXTERN UBYTE cmhPSI_GetStopBitOverSrcID( UBYTE srcId );
EXTERN UBYTE cmhPSI_GetDataBitOverSrcID( UBYTE srcId );
EXTERN void cmhPSI_SetDcbParToUnchanged( T_ACI_DEVICE_DCB_ENTRY *dcbntry );
EXTERN T_ACI_RETURN cmhPSI_SetDataRate ( UBYTE srcId, T_ACI_BD_RATE  rate);
EXTERN T_ACI_RETURN cmhPSI_SetCharacterFraming ( UBYTE srcId, 
                                                  T_ACI_BS_FRM format, 
                                                  T_ACI_BS_PAR parity );
EXTERN void cmhPSI_Ind (T_ACI_PSI *psi_indic_msg, UBYTE src_id,U32 dio_cap);
EXTERN T_ACI_RETURN cmhPSI_SetFlowControl (UBYTE srcId, T_ACI_RX_FLOW_CTRL DCE_by_DTE);
EXTERN T_ACI_RETURN cmhPSI_SetEscape( UBYTE srcId, UBYTE detection );
EXTERN T_ACI_BS_FRM cmhPSI_GetFktInterfaceFormat( T_ACI_DEVICE_DCB_ENTRY *dcbntry );
EXTERN T_ACI_BS_PAR cmhPSI_GetFktInterfaceParity( T_ACI_DEVICE_DCB_ENTRY *dcbntry );
EXTERN T_ACI_DTI_PRC_PSI *cmhPSI_find_dlci (T_ACI_LIST *search_list, U32 devId, UBYTE dlci );
EXTERN void cmhPSI_lst_init (void);
EXTERN void cmhPSI_clean_all_elem(void);
EXTERN T_ACI_LIST *psi_src_params;
EXTERN T_ACI_LIST *psi_dcb_par;

EXTERN  void psaPSI_SetConfReq( T_ACI_DEVICE_DCB_ENTRY *dcbPar );
/*==== EXPORT =====================================================*/
#ifdef CMH_PSIF_C
GLOBAL T_ACI_PSI_CALL_TYPE psi_ato;
#else
EXTERN T_ACI_PSI_CALL_TYPE psi_ato;
#endif  /* CMH_PSIF_C */

#endif /*CMH_PSI_H*/

#endif
/*==== EOF =======================================================*/