view src/g23m-aci/aci/psa_ssp.c @ 220:0ed36de51973

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   :  PSA_SSP
+----------------------------------------------------------------------------- 
|  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 :  This module defines the processing functions for the
|             primitives send to the protocol stack adapter by 
|             supplementary service.
+----------------------------------------------------------------------------- 
*/ 

#ifndef PSA_SSP_C
#define PSA_SSP_C
#endif

#include "aci_all.h"

/*==== INCLUDES ===================================================*/
#include "aci_cmh.h"
#include "ati_cmd.h"
#include "aci_cmd.h"

#include "ksd.h"
#include "aci.h"
#include "psa.h"
#include "psa_ss.h"

#ifdef SIM_TOOLKIT
#include "psa_cc.h"
#include "psa_sat.h"
#endif

#include "cmh_ss.h"
#include "aci_mem.h"

/*==== CONSTANTS ==================================================*/


/*==== TYPES ======================================================*/


/*==== EXPORT =====================================================*/


/*==== VARIABLES ==================================================*/


/*==== FUNCTIONS ==================================================*/


/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_SSP                 |
|                                 ROUTINE : psa_mnss_begin_ind      |
+-------------------------------------------------------------------+

  PURPOSE : processes the MNSS_BEGIN_IND primitive send by SS.
            this indicates an incoming service transaction.

*/

GLOBAL void psa_mnss_begin_ind 
                                 ( T_MNSS_BEGIN_IND *mnss_begin_ind )
{
  SHORT sId;                /* holds service id */        
  T_SS_SRV_TBL * pStbNtry;  /* holds pointer to service table entry */

  TRACE_FUNCTION ("psa_mnss_begin_ind()");

/*
 *-------------------------------------------------------------------
 * check for new entry in service table
 *-------------------------------------------------------------------
 */  
 psaSS_DumpFIE ( &mnss_begin_ind -> fac_inf );
#ifdef TI_PS_FF_AT_P_CMD_CSCN
 cmhSS_sendFie( CSCN_FACILITY_DIRECTION_IN,
                CSCN_FACILITY_TRANS_TYPE_BEGIN,
                &mnss_begin_ind -> fac_inf);
#endif /* TI_PS_FF_AT_P_CMD_CSCN */

  sId = psaSS_stbNewEntry();

  if( sId < 0 )
  {
    TRACE_EVENT ("MTS rejected due to full service table");

    return;
  }

/*
 *-------------------------------------------------------------------
 * update shared parameter and notify ACI
 *-------------------------------------------------------------------
 */ 
  pStbNtry = &ssShrdPrm.stb[sId];
  
  pStbNtry -> ntryUsdFlg = TRUE;
  pStbNtry -> ti         = mnss_begin_ind -> ti;

  pStbNtry -> srvStat = SSS_ACT;
  pStbNtry -> srvType = ST_MTS;

  psaSS_chngSrvTypCnt( sId, +1 );

/*
 *-------------------------------------------------------------------
 * decode component type
 *-------------------------------------------------------------------
 */  
  CCD_START;
  {
    UBYTE ccdRet;

    MCAST( com, COMPONENT );  /* T_COMPONENT *com = (T_COMPONENT *)_decodedMsg; */
    memset( com, 0, sizeof( T_COMPONENT ));
    
    ccdRet = ccd_decodeMsg (CCDENT_FAC,
                            DOWNLINK,
                            (T_MSGBUF *) &mnss_begin_ind -> fac_inf,
                            (UBYTE    *) _decodedMsg,
                            COMPONENT);
    if( ccdRet NEQ ccdOK )
    {
      TRACE_EVENT_P1( "CCD Decoding Error: %d",ccdRet );
      ssShrdPrm.stb[sId].failType = SSF_CCD_DEC;
      cmhSS_TransFail(sId);
    }
    else
    {
      /* use prim buffer as further decoding buffer */
      ssFIEDecodeBuf = mnss_begin_ind -> fac_inf.fac;

      if( com->v_inv_comp )
      {
        T_COMPONENT *psCopyOfCom;
        ACI_MALLOC( psCopyOfCom, sizeof(T_COMPONENT) );
        /* now copy the com content for second CCD process */
        memcpy( psCopyOfCom, com, sizeof(T_COMPONENT) );
        psaSS_dasmInvokeCmp( sId, &(psCopyOfCom->inv_comp) );
        ACI_MFREE(psCopyOfCom);
      }
      else
      {
        TRACE_EVENT( "WRONG COMPONENT TYPE RECEIVED" );
      }
    }
  }
  CCD_END;
/*
 *-------------------------------------------------------------------
 * free primitive
 *-------------------------------------------------------------------
 */
  ssFIEDecodeBuf = NULL;
  PFREE (mnss_begin_ind);
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_SSP                 |
|                                 ROUTINE : psa_mnss_end_ind        |
+-------------------------------------------------------------------+

  PURPOSE : processes the MNSS_END_IND primitive send by SS.
            this indicates the end of a service transaction.

*/

GLOBAL void psa_mnss_end_ind( T_MNSS_END_IND *mnss_end_ind )
{
  SHORT        sId;          /* holds service id */
  T_SS_SRV_TBL *pStbNtry;    /* holds pointer to service table entry */
  SHORT        pending_sId;  /* holds second id if there is one */
  BOOL         this_is_a_ussd_string;
  T_ACI_RETURN ss_return;

  TRACE_FUNCTION ("psa_mnss_end_ind()");

  /* trace facility */
 psaSS_DumpFIE ( &mnss_end_ind -> fac_inf );
#ifdef TI_PS_FF_AT_P_CMD_CSCN
 cmhSS_sendFie ( CSCN_FACILITY_DIRECTION_IN,
                 CSCN_FACILITY_TRANS_TYPE_END,
                 &mnss_end_ind -> fac_inf);
#endif /* TI_PS_FF_AT_P_CMD_CSCN */

#ifdef SIM_TOOLKIT
  /* reinitalize. */
  satShrdPrm.sId_pwd_requested = NO_ENTRY;
#endif /* SIM_TOOLKIT */

  /* find service in service table */  
  sId = psaSS_stbFindTi( mnss_end_ind -> ti );

  if( sId < 0 )
  {
    /* ignore primitive, due to not found transaction identifier. */
    TRACE_EVENT ("primitive rejected due to unused ti");
    PFREE(mnss_end_ind);
    return;
  }

  /* update shared parameter */  
  pStbNtry = &ssShrdPrm.stb[sId];

  pStbNtry -> failType = SSF_SS_ENT;
  pStbNtry -> entCs    = mnss_end_ind -> cause;

  pStbNtry -> srvStat = SSS_IDL;

  psaSS_chngSrvTypCnt( sId, -1 );
  psaSS_retMOSTi( sId );

  /****** Is this a USSD operation ? ****/
  if( ssShrdPrm.stb[sId].curCmd EQ AT_CMD_CUSD   OR
      ssShrdPrm.stb[sId].curCmd EQ (T_ACI_AT_CMD)KSD_CMD_USSD )
  {
    this_is_a_ussd_string = TRUE;
  }
#ifdef SIM_TOOLKIT
  else if( ssShrdPrm.stb[sId].srvOwn EQ OWN_SRC_SAT  AND
           sId EQ satShrdPrm.SentUSSDid )
  {
    /* SAT send USSD case */
    this_is_a_ussd_string = TRUE;
  }
#endif /* SIM_TOOLKIT */
  else
    this_is_a_ussd_string = FALSE;
  /************************************/


  /****** check error cause ***********/
  TRACE_EVENT_P1 ("SS end indication cause: %d", mnss_end_ind -> cause);

  if( mnss_end_ind->cause EQ MNSS_CAUSE_FACILITY_REJECT )
  {
    TRACE_EVENT("Facility has been rejected");

    /* check for protocol incompatibility for USSD */
    if( this_is_a_ussd_string  AND
        psaSS_asmUSSDProt1(sId) )
    {   
      /* facility with Protocole 1 format has been sent: wait for answer */
    }
    else
    {
      cmhSS_TransFail(sId);
    }
    PFREE (mnss_end_ind);
    return;
  }
  /************************************/

#ifdef SIM_TOOLKIT
  /* if SIM TOOLKIT and empty facility send send error to SAT 
  (but should have checked USSD compatibility BEFORE) */
  if( (ssShrdPrm.stb[sId].srvOwn EQ OWN_SRC_SAT) AND
      (mnss_end_ind -> fac_inf.l_fac EQ 0) )
  {
    cmhSS_TransFail(sId);
    PFREE (mnss_end_ind);
    return;
  }
#endif /* SIM_TOOLKIT */


  /*************************/
  /* decode component type */
  CCD_START;
  {
    UBYTE        ccdRet;
    T_COMPONENT *psCopyOfCom;
    BOOL        is_critical_warning = FALSE;

    MCAST( com, COMPONENT );    /* T_COMPONENT *com = (T_COMPONENT *)_decodedMsg; */
    memset( com, 0, sizeof( T_COMPONENT ));
    

    ccdRet = ccd_decodeMsg (CCDENT_FAC,
                            DOWNLINK,
                            (T_MSGBUF *) &mnss_end_ind -> fac_inf,
                            (UBYTE    *) _decodedMsg,
                            COMPONENT);
    if( ccdRet NEQ ccdOK )
    {
      if (ccdRet EQ ccdWarning)
      {
        UBYTE ccd_err;
        USHORT parlist [6];

        ccd_err = ccd_getFirstError (CCDENT_SS, parlist);

        do
        {
          switch (ccd_err)
          {
            case ERR_LEN_MISMATCH:     /* recoverable warnings */
            break;                       
            default:
            is_critical_warning = TRUE;  /* critical warning */
          }
          ccd_err = ccd_getNextError (CCDENT_SS, parlist);
        }while (ccd_err NEQ ERR_NO_MORE_ERROR);
      }

      if((ccdRet EQ ccdError) OR is_critical_warning)
      {
        TRACE_EVENT_P1("CCD Decoding Error: %d", ccdRet);
        ssShrdPrm.stb[sId].failType = SSF_CCD_DEC;
        cmhSS_TransFail(sId);
        CCD_END;
        PFREE (mnss_end_ind);
        return;
      }
    }

    /* use prim buffer as further decoding buffer */
    ssFIEDecodeBuf = mnss_end_ind -> fac_inf.fac;

    ACI_MALLOC( psCopyOfCom, sizeof(T_COMPONENT) );
    /* now copy the com content for second CCD process */
    memcpy( psCopyOfCom, com, sizeof(T_COMPONENT) );

#ifdef SIM_TOOLKIT
    if( ssShrdPrm.stb[sId].srvOwn EQ OWN_SRC_SAT )
    {
      ss_return = psaSAT_ss_end_ind( sId, psCopyOfCom, mnss_end_ind, this_is_a_ussd_string );
    }
    else
#endif /* SIM_TOOLKIT */
    {
      ss_return = psaSS_ss_end_ind( sId, psCopyOfCom, this_is_a_ussd_string );
    }

    ACI_MFREE(psCopyOfCom);

    switch(ss_return)
    {
      case(AT_CMPL):
        /* facility with Protocole 1 format has been sent: wait for answer */
        CCD_END;
        PFREE (mnss_end_ind);
        return;

      case(AT_EXCT):
        /* if more than one transactions were intended, send next one */
        if ( ssShrdPrm.mltyTrnFlg )
        {
          /* no error occured, then send next one */
          pending_sId = psaSS_GetPendingTrn( );
          /* unsent id flag */
          ssShrdPrm.mltyTrnFlg &= ~( 1u << pending_sId );
          /* send pending primitive */
          PSENDX (SS, ssShrdPrm.stb[pending_sId].save_prim ); 
        }
        break;

      default:
        cmhSS_TransFail(sId);
        break;
    }
  }
  CCD_END;
  PFREE (mnss_end_ind);
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_SSP                 |
|                                 ROUTINE : psa_mnss_facility_ind   |
+-------------------------------------------------------------------+

  PURPOSE : processes the MNSS_FACILITY_IND primitive send by SS.
            this indicates the receiving of a facility information 
            element.

*/

GLOBAL void psa_mnss_facility_ind 
                           ( T_MNSS_FACILITY_IND *mnss_facility_ind )
{
  SHORT sId;                 /* holds call id */

  TRACE_FUNCTION ("psa_mnss_facility_ind()");

/*
 *-------------------------------------------------------------------
 * find call in call table
 *-------------------------------------------------------------------
 */
 psaSS_DumpFIE ( &mnss_facility_ind -> fac_inf );
#ifdef TI_PS_FF_AT_P_CMD_CSCN
 cmhSS_sendFie ( CSCN_FACILITY_DIRECTION_IN,
                 CSCN_FACILITY_TRANS_TYPE,
                 &mnss_facility_ind -> fac_inf);
#endif /* TI_PS_FF_AT_P_CMD_CSCN */

  sId = psaSS_stbFindTi( mnss_facility_ind -> ti );

  if( sId < 0 )
  {
   /* 
    * ignore primitive, due to not found transaction identifier.
    */
    TRACE_EVENT ("primitive rejected due to unused ti");
    PFREE(mnss_facility_ind);
    return;
  }

/*
 *-------------------------------------------------------------------
 * update shared parameter and notify ACI
 *-------------------------------------------------------------------
 */  

/*
 *-------------------------------------------------------------------
 * decode component type
 *-------------------------------------------------------------------
 */ 
  CCD_START;
  {
    UBYTE        ccdRet;

    MCAST( com, COMPONENT ); /* T_COMPONENT *com = (T_COMPONENT *)_decodedMsg; */
    memset( com, 0, sizeof( T_COMPONENT ));

    ccdRet = ccd_decodeMsg (CCDENT_FAC,
                            DOWNLINK,
                            (T_MSGBUF *) &mnss_facility_ind -> fac_inf,
                            (UBYTE    *) _decodedMsg,
                            COMPONENT);    
    if( ccdRet NEQ ccdOK )
    {
      TRACE_EVENT_P1( "CCD Decoding Error: %d",ccdRet );
      ssShrdPrm.stb[sId].failType = SSF_CCD_DEC;
      cmhSS_TransFail(sId);
    }
    else
    {
      T_COMPONENT *psCopyOfCom;
      ACI_MALLOC( psCopyOfCom, sizeof(T_COMPONENT) );
      /* now copy the com content for second CCD process */
      memcpy( psCopyOfCom, com, sizeof(T_COMPONENT) );

      /* use prim buffer as further decoding buffer */
      ssFIEDecodeBuf = mnss_facility_ind -> fac_inf.fac;

      if( com->v_inv_comp)
      {
        psaSS_dasmInvokeCmp( sId, &(psCopyOfCom->inv_comp) );
      }
      else if (com->v_res_comp)
      {
        psaSS_dasmResultCmp( sId, &(psCopyOfCom->res_comp) );
      }
      else
      {
        TRACE_EVENT( "WRONG COMPONENT TYPE RECEIVED" );
      }

      ACI_MFREE(psCopyOfCom);
    }
  }
  CCD_END;
/*
 *-------------------------------------------------------------------
 * free the primitive buffer
 *-------------------------------------------------------------------
 */  
  PFREE (mnss_facility_ind);
}


/*==== EOF =========================================================*/