view src/g23m-aci/aci/psa_mms.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 f76436d19a7a
line wrap: on
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/*   
+----------------------------------------------------------------------------- 
|  Project :  GSM-PS (6147)
|  Modul   :  PSA_MM
+----------------------------------------------------------------------------- 
|  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 signalling functions of the 
|             protocol stack adapter for the registration part of 
|             mobility management.
+----------------------------------------------------------------------------- 
*/ 

#if !defined (DTI) || !defined(GPRS)

#ifndef PSA_MMS_C
#define PSA_MMS_C
#endif

#include "aci_all.h"
#ifdef DTI
#include "dti.h"
#include "dti_conn_mng.h"
#endif
/*==== INCLUDES ===================================================*/
#include "aci_cmh.h"
#include "ati_cmd.h"
#include "aci_cmd.h"
#include "aci.h"
#include "psa.h"
#include "psa_mm.h"

#include "aci_ext_pers.h"    
#include "aci_slock.h"  
#include "cmh.h"
#include "psa_sim.h"
#include "cmh_sim.h"

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

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


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


/*==== VARIABLES ==================================================*/
LOCAL BOOL  frstFlg = TRUE;  /* flags first attempt */

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


/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_MMS                 |
|                                 ROUTINE : psaMM_Registrate        |
+-------------------------------------------------------------------+

  PURPOSE : start network registration 

*/

GLOBAL SHORT psaMM_Registrate ( void )
{
  TRACE_FUNCTION ("psaMM_Registrate()");


/*
 *-------------------------------------------------------------------
 * check owner id
 *-------------------------------------------------------------------
 */  
  if(!psa_IsVldOwnId(mmShrdPrm.owner)) 
    
    return( -1 );

  /*
   * Set automatic registration mode in MM
   */
  psaMM_SetRegMode ( MODE_AUTO );

/*
 *-------------------------------------------------------------------
 * create and send primitive for network registration
 *-------------------------------------------------------------------
 */
  {
    PALLOC (mmr_reg_req, MMR_REG_REQ);
    /* mmr_reg_req->service_mode = SERVICE_MODE_FULL; */
    /* OVK Set proper service mode dependent on Sim lock state */
   #ifdef SIM_PERS
    if (AciSLockShrd.blocked EQ TRUE)
    {
       mmr_reg_req->service_mode = SERVICE_MODE_LIMITED;   
    }
    else
   #endif
    if (simShrdPrm.imei_blocked EQ TRUE)
    {
       mmr_reg_req->service_mode = SERVICE_MODE_LIMITED;   
    }
    else
    {
       mmr_reg_req->service_mode = SERVICE_MODE_FULL;
    }
   


    PSENDX (MM, mmr_reg_req);
  }

  frstFlg = FALSE;  
  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_MMS                 |
|                                 ROUTINE : psaMM_DeRegistrate      |
+-------------------------------------------------------------------+

  PURPOSE : start network de-registration 

*/

GLOBAL SHORT psaMM_DeRegistrate ( void )
{

  TRACE_FUNCTION ("psaMM_DeRegistrate()");

  /*
   *-------------------------------------------------------------------
   * create and send primitive for deregistration
   *-------------------------------------------------------------------
   */  
  {
    PALLOC (mmr_nreg_req, MMR_NREG_REQ); /* T_MMR_NREG_REQ */
      
    mmr_nreg_req->detach_cause = mmShrdPrm.nrgCs;

    PSENDX (MM, mmr_nreg_req);
  }

  frstFlg = TRUE;  
  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_MMS                 |
|                                 ROUTINE : psaMM_NetSrch           |
+-------------------------------------------------------------------+

  PURPOSE : request network search

*/

GLOBAL SHORT psaMM_NetSrch ( void )
{
  TRACE_FUNCTION ("psaMM_NetSrch()");

/*
 *-------------------------------------------------------------------
 * check owner id
 *-------------------------------------------------------------------
 */  
  if(!psa_IsVldOwnId(mmShrdPrm.owner)) 
    
    return( -1 );

  /*
   * set manual registration mode in MM 
   */
  psaMM_SetRegMode ( MODE_MAN );

/*
 *-------------------------------------------------------------------
 * create and send primitive for network search
 *-------------------------------------------------------------------
 */
  if( frstFlg EQ TRUE
#ifdef FF_DUAL_SIM
    AND CFUNfun EQ CFUN_FUN_Full
#endif /*FF_DUAL_SIM*/
    )
  {
    PALLOC (mmr_reg_req, MMR_REG_REQ);
    mmr_reg_req->service_mode = SERVICE_MODE_FULL;
    PSENDX (MM, mmr_reg_req);
    frstFlg = FALSE;
  }
  else
  {
    PALLOC (mmr_net_req, MMR_NET_REQ);
    PSENDX (MM, mmr_net_req);
    frstFlg = FALSE;
  }

  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_MMS                 |
|                                 ROUTINE : psaMM_NetSel            |
+-------------------------------------------------------------------+

  PURPOSE : select a network

*/

GLOBAL SHORT psaMM_NetSel ( void )
{
  TRACE_FUNCTION ("psaMM_NetSel()");

/*
 *-------------------------------------------------------------------
 * check owner id
 *-------------------------------------------------------------------
 */  
  if(!psa_IsVldOwnId(mmShrdPrm.owner)) 
    
    return( -1 );

  /*
   * set manual registration mode in MM
   */
  psaMM_SetRegMode ( MODE_MAN );

/*
 *-------------------------------------------------------------------
 * create and send primitive for network select
 *-------------------------------------------------------------------
 */  
  {
    PALLOC (mmr_plmn_res, MMR_PLMN_RES);

    /* fill in primitive parameter: selected PLMN */
    mmr_plmn_res -> plmn = mmShrdPrm.slctPLMN;

    PSENDX (MM, mmr_plmn_res);
  }

  frstFlg = FALSE;

  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_MMS                 |
|                                 ROUTINE : psaMM_SetRegMode        |
+-------------------------------------------------------------------+

  PURPOSE : set the registration mode 

*/

GLOBAL SHORT psaMM_SetRegMode ( UBYTE mode )
{
  TRACE_FUNCTION ("psaMM_SetRegMode()");

  /*
   *-------------------------------------------------------------------
   * create and send primitive for registration mode
   *-------------------------------------------------------------------
   */
  {
    PALLOC (mmr_plmn_mode_req, MMR_PLMN_MODE_REQ); /* T_MMR_PLMN_MODE_REQ */
    mmr_plmn_mode_req -> mode = mode;
    PSENDX (MM, mmr_plmn_mode_req);
  }

  return 0;
}
#endif  /* DTI */

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