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view src/g23m-aci/aci/gaci_srcc.c @ 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
line source

/* 
+----------------------------------------------------------------------------- 
|  Project :  
|  Modul   :  
+----------------------------------------------------------------------------- 
|  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 implements the source control management for GACI.
+----------------------------------------------------------------------------- 
*/ 


#ifdef GPRS

#include "aci_all.h"

/*==== INCLUDES ===================================================*/
#include "dti.h"      /* functionality of the dti library */
#include "aci_cmh.h"

#include "dti_conn_mng.h"
#include "dti_cntrl_mng.h"

#include "gaci.h"
#include "gaci_cmh.h"
#include "psa.h"
#include "psa_sm.h"
#include "psa_gppp.h"
#include "psa_gmm.h"


#include "cmh.h"
#include "cmh_sm.h"
#include "cmh_gppp.h"
#include "cmh_gmm.h"
#include "gaci_srcc.h"


/*===== PRIVATE VARIABLES ==========================================*/
static UBYTE entity_counter[SRRC_MAX_ENTITY];

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

/*
+--------------------------------------------------------------------+
| PROJECT :                       MODULE  : ACI_DTI                  |
| STATE   : finished              ROUTINE : srcc_init                |
+--------------------------------------------------------------------+

  PURPOSE : init of source control management
*/
GLOBAL void srcc_init (void)
{
  SHORT i = 0;

  for (i = 0; i < SRRC_MAX_ENTITY; i++)
    entity_counter[i] = 0;
}

/*
+--------------------------------------------------------------------+
| PROJECT :                       MODULE  : ACI_DTI                  |
| STATE   : finished              ROUTINE : srcc_new_count           |
+--------------------------------------------------------------------+

  PURPOSE : 
*/
GLOBAL void srcc_new_count ( SRCC_LINK_NO link_no )
{
  
  T_PDP_CONTEXT_INTERNAL *p_pdp_context_node = NULL;

  p_pdp_context_node = pdp_context_find_node_from_cid( work_cids[cid_pointer] );

  TRACE_FUNCTION("srcc_new_count()");

  if ( !p_pdp_context_node )
  {
    TRACE_ERROR("PDP Context Not Found");
    return;
  }

  if ( srcc_reserve_sources( link_no, 1) )
  {
    switch( link_no )
    {

      case SRCC_PPPS_SNDCP_LINK:
        entity_counter[SRRC_PPPS_ENTITY]++;
        entity_counter[SRRC_SNDCP_ENTITY]++;
        TRACE_EVENT_P3("link_no = %d, new PPP counter = %d and new SNDCP counter = %d",
                        link_no, entity_counter[SRRC_PPPS_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
        break;

#if defined (FF_PKTIO) OR defined (FF_TCP_IP) OR defined (FF_PSI)
      case SRCC_PKTIO_SNDCP_LINK:
        entity_counter[SRRC_SNDCP_ENTITY]++;
        TRACE_EVENT_P2("link_no = %d, new SNDCP counter = %d",
                        link_no, entity_counter[SRRC_SNDCP_ENTITY]);
        break;
#endif /* FF_PKTIO OR FF_TCP_IP OR FF_PSI */

#ifdef FF_SAT_E        
      case SRCC_SIM_SNDCP_LINK:
        entity_counter[SRRC_SIM_ENTITY]++;
        entity_counter[SRRC_SNDCP_ENTITY]++;
        TRACE_EVENT_P3("link_no = %d, new SIM counter = %d and new SNDCP counter = %d",
                        link_no, entity_counter[SRRC_SIM_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
        break;
#endif
        
      case SRCC_IP_SNDCP_LINK:
#ifdef CO_UDP_IP
        entity_counter[SRRC_IP_ENTITY]++;
        TRACE_EVENT_P2("link_no = %d, new IP counter = %d",
                      link_no, entity_counter[SRRC_IP_ENTITY]);
#endif
        entity_counter[SRRC_SNDCP_ENTITY]++;
        TRACE_EVENT_P1("new SNDCP counter = %d", entity_counter[SRRC_SNDCP_ENTITY]);
        break;
 
#ifdef FF_GPF_TCPIP
      case SRCC_TCPIP_SNDCP_LINK:
        entity_counter[SRRC_TCPIP_ENTITY]++;
        entity_counter[SRRC_SNDCP_ENTITY]++;
        TRACE_EVENT_P3("link_no = %d, new TCPIP counter = %d and new SNDCP counter = %d",
                        link_no, entity_counter[SRRC_TCPIP_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
        break;
#endif
       
      default:
        TRACE_EVENT_P1("ERROR: srcc_new_count: link_no unknown: %d",link_no);
        return;
    }
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT :                       MODULE  : ACI_DTI                  |
| STATE   : finished              ROUTINE : srcc_delete_count        |
+--------------------------------------------------------------------+

  PURPOSE : 
*/
GLOBAL void srcc_delete_count ( SRCC_LINK_NO link_no )
{

  TRACE_FUNCTION("srcc_delete_count()");

  switch( link_no )
  {
    case SRCC_PPPS_SNDCP_LINK:
      entity_counter[SRRC_PPPS_ENTITY]--;
      entity_counter[SRRC_SNDCP_ENTITY]--;
      TRACE_EVENT_P3("link_no = %d, new PPP counter = %d and new SNDCP counter = %d",
                      link_no, entity_counter[SRRC_PPPS_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
      return;
#if defined (FF_PKTIO) OR defined (FF_TCP_IP) OR defined (FF_PSI)
    case SRCC_PKTIO_SNDCP_LINK:
      entity_counter[SRRC_SNDCP_ENTITY]--;
      TRACE_EVENT_P1("new SNDCP counter = %d", entity_counter[SRRC_SNDCP_ENTITY]);
      return;
#endif /* FF_PKTIO OR FF_TCP_IP OR FF_PSI */
#ifdef FF_SAT_E      
    case SRCC_SIM_SNDCP_LINK:
      entity_counter[SRRC_SIM_ENTITY]--;
      entity_counter[SRRC_SNDCP_ENTITY]--;
      TRACE_EVENT_P3("link_no = %d, new SIM counter = %d and new SNDCP counter = %d",
                      link_no, entity_counter[SRRC_SIM_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
      break;
#endif 
    case SRCC_IP_SNDCP_LINK:
#ifdef CO_UDP_IP
      entity_counter[SRRC_IP_ENTITY]--;
      TRACE_EVENT_P2("link_no = %d, new IP counter = %d",
                      link_no, entity_counter[SRRC_IP_ENTITY]);
#endif
      entity_counter[SRRC_SNDCP_ENTITY]--;
      TRACE_EVENT_P1("new SNDCP counter = %d", entity_counter[SRRC_SNDCP_ENTITY]);
      break;

#ifdef FF_GPF_TCPIP
    case SRCC_TCPIP_SNDCP_LINK:
      entity_counter[SRRC_TCPIP_ENTITY]--;  
      entity_counter[SRRC_SNDCP_ENTITY]--;
      TRACE_EVENT_P3("link_no = %d, new TCPIP counter = %d and new SNDCP counter = %d",
                      link_no, entity_counter[SRRC_TCPIP_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
      return;
#endif

    default:
      return;
  }
}

/*
+--------------------------------------------------------------------+
| PROJECT :                       MODULE  : ACI_DTI                  |
| STATE   : finished              ROUTINE : srcc_reserve_sources     |
+--------------------------------------------------------------------+

  PURPOSE : check the possibility of creation a number of dti connections
*/
GLOBAL BOOL srcc_reserve_sources( SRCC_LINK_NO link_no, SHORT no )
{

  TRACE_FUNCTION("srcc_reserve_sources()");

  switch( link_no )
  {

    case SRCC_PPPS_SNDCP_LINK:
      if ( entity_counter[SRRC_PPPS_ENTITY]  >= MAX_PPPS_INSTANCES OR
           entity_counter[SRRC_SNDCP_ENTITY] >= MAX_SNDCP_INSTANCES
         )
      {
        TRACE_EVENT_P3("FAILED to reserve resources for link_no = %d, PPP counter = %d and SNDCP counter = %d",
                        link_no, entity_counter[SRRC_PPPS_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
        return FALSE;
      }
      break;

#if defined (FF_PKTIO) OR defined (FF_TCP_IP) OR defined (FF_PSI)
    case SRCC_PKTIO_SNDCP_LINK:
      if ( entity_counter[SRRC_SNDCP_ENTITY] >= MAX_SNDCP_INSTANCES )
      {
        TRACE_EVENT_P2("FAILED to reserve resources for link_no = %d, SNDCP counter = %d",
                        link_no, entity_counter[SRRC_SNDCP_ENTITY]);
        return FALSE;
      }
      break;
#endif /* FF_PKTIO OR FF_TCP_IP  OR FF_PSI */

#ifdef FF_SAT_E      
    case SRCC_SIM_SNDCP_LINK:
      if ( entity_counter[SRRC_SIM_ENTITY] >= MAX_SIM_INSTANCES OR
           entity_counter[SRRC_SNDCP_ENTITY] >= MAX_SNDCP_INSTANCES  )
      {
        TRACE_EVENT_P3("FAILED to reserve resources for link_no = %d, SIM counter = %d and SNDCP counter = %d",
                        link_no, entity_counter[SRRC_SIM_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
        return FALSE;
      }
      break;
#endif /* FF_SAT_E */      

    case SRCC_IP_SNDCP_LINK:
      if ( entity_counter[SRRC_SNDCP_ENTITY] >= MAX_SNDCP_INSTANCES
#ifdef CO_UDP_IP
           OR
           entity_counter[SRRC_IP_ENTITY] >= MAX_IP_INSTANCES
#endif
          )
      {
        TRACE_EVENT_P2("FAILED to reserve resources for link_no = %d, SNDCP counter = %d",
                        link_no, entity_counter[SRRC_SNDCP_ENTITY]);
#ifdef CO_UDP_IP
        TRACE_EVENT_P1(" IP counter = %d", entity_counter[SRRC_IP_ENTITY]);
#endif
        return FALSE;
      }
      break;

    #ifdef FF_GPF_TCPIP
    case SRCC_TCPIP_SNDCP_LINK:
         if ( entity_counter[SRRC_SNDCP_ENTITY] >= MAX_SNDCP_INSTANCES
            OR entity_counter[SRRC_TCPIP_ENTITY] >= MAX_TCPIP_INSTANCES  )
         {
           TRACE_EVENT_P3("FAILED to reserve resources for link_no = %d, TCPIP counter = %d and SNDCP counter = %d",
                        link_no, entity_counter[SRRC_TCPIP_ENTITY], entity_counter[SRRC_SNDCP_ENTITY]);
           return FALSE;
         }
       break;

    #endif /* FF_GPF_TCPIP */

    default:
      return FALSE;
  }

  return TRUE;
}
#endif