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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 :  GPRS (8441)
|  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 modul is part of the entity GRR and implements all 
|             procedures and functions as described in the 
|             SDL-documentation (-statemachine)
+----------------------------------------------------------------------------- 
*/ 



#ifndef GMM_F_C
#define GMM_F_C
#endif

#define ENTITY_GMM

/*==== INCLUDES =============================================================*/

#include "typedefs.h"	 /* to get Condat data types */
#include "vsi.h"	/* to get a lot of macros */
#include "macdef.h"
#include "gprs.h"
#include "gsm.h"	/* to get a lot of macros */
#include "ccdapi.h"	/* to get CCD API */
#include "cnf_gmm.h"	/* to get cnf-definitions */
#include "mon_gmm.h"	/* to get mon-definitions */
#include "prim.h"	/* to get the definitions of used SAP and directions */
#include "gmm.h"	/* to get the global entity definitions */

#include "gmm_f.h"
#include <stdlib.h>	/* JK, delete warnings: to get rand() */

/*==== CONST ================================================================*/

/*==== DIAGNOSTICS ==========================================================*/

#ifndef TRACE_INFO	 /* only used in local environment */
#  define TRACE_INFO(x)
#endif

#ifndef TRACE_COMMENT	 /* only used in local environment */
#  define TRACE_COMMENT(x)
#endif


/*==== LOCAL VARS ===========================================================*/

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

/*==== PUBLIC FUNCTIONS =====================================================*/
/*
+------------------------------------------------------------------------------
| Function    : gmm_set_current_tlli
+------------------------------------------------------------------------------
| Description : derives the current TLLI with the given TLLI type and saves
|		the old TLLI
|
| Parameters  : tlli_type - the wanted TLLI type
|
+------------------------------------------------------------------------------
*/
GLOBAL void gmm_set_current_tlli ( T_TLLI_TYPE tlli_type ) 
{
  GMM_TRACE_FUNCTION ("gmm_set_current_tlli");

  gmm_data->tlli.old	  = gmm_data->tlli.current,
  gmm_data->tlli.current  = gmm_get_tlli ( tlli_type );
      
  GMM_TRACE_GMM_DATA(GMM_DEBUG_PRINT_MASK_TLLI);

  GMM_RETURN;
} /* gmm_set_current_tlli */


/*
+------------------------------------------------------------------------------
| Function    : gmm_get_tlli
+------------------------------------------------------------------------------
| Description : returns the wanted TLLI
|
| Parameters  : tlli_type - the wanted TLLI type
|
+------------------------------------------------------------------------------
*/
GLOBAL ULONG gmm_get_tlli ( T_TLLI_TYPE tlli_type ) 
{
  GMM_TRACE_FUNCTION ("gmm_get_tlli()");

  /* 
   * the random tlli must be created 
   */
  
  if ( GMMRR_TMSI_INVALID == gmm_data->ptmsi.current
  /* 
   * the random tlli must be created 
   */
  
  &&   tlli_type != RANDOM_TLLI 
  &&   tlli_type != CURRENT_TLLI )
  {
    gmm_data->ptmsi.current= GMMRR_TMSI_INVALID;
    gmm_data->ptmsi.new_grr = GMMRR_TMSI_INVALID;
    gmm_data->ptmsi.old    = GMMRR_TMSI_INVALID;
    gmm_data->tlli.current_type = INVALID_TLLI;
    TRACE_0_OUT_PARA ("first tlli used");
    GMM_RETURN_ ( LLGMM_TLLI_INVALID);
  }
  else
  {
    /* gmm_data->ptmsi.v_mid = TRUE; */
   
    switch ( tlli_type )
    {
      case LOCAL_TLLI:
        gmm_data->tlli.current_type = tlli_type;
    
        gmm_data->tlli.current =  gmm_data->ptmsi.current | LOCAL_TLLI_SET_MASK;
        gmm_data->tlli.current &= LOCAL_TLLI_RES_MASK;
        TRACE_0_OUT_PARA("local tlli used");
        break;
      case FOREIGN_TLLI:
        gmm_data->tlli.current_type = tlli_type;
        
        gmm_data->tlli.current =  gmm_data->ptmsi.current | FOREIGN_TLLI_SET_MASK;
        gmm_data->tlli.current &=  FOREIGN_TLLI_RES_MASK;
        TRACE_0_OUT_PARA ("foreign tlli used");
        break;  
      case RANDOM_TLLI:
        gmm_data->tlli.current_type = CURRENT_TLLI;

        #ifdef _SIMULATION_
          /* This number is a very random number */
          gmm_data->ptmsi.current = 0x06081997L;
        #else
          gmm_data->ptmsi.current = (rand()<<16) +rand();
        #endif

        gmm_data->tlli.current	=  gmm_data->ptmsi.current | RANDOM_TLLI_SET_MASK;
        gmm_data->tlli.current	&= RANDOM_TLLI_RES_MASK;
        gmm_data->ptmsi.current = GMMRR_TMSI_INVALID;
        gmm_data->ptmsi.old    = GMMRR_TMSI_INVALID;

        TRACE_0_OUT_PARA ("random tlli used");
        break;
      case OLD_TLLI:
        GMM_RETURN_ (gmm_data->tlli.old);
      case CURRENT_TLLI:
        GMM_RETURN_ (gmm_data->tlli.current)/*gmm_get_tlli ( gmm_data->tlli.current_type )*/;
      case INVALID_TLLI:
        TRACE_0_OUT_PARA ("first tlli used");
        GMM_RETURN_ (LLGMM_TLLI_INVALID);
      default:
        TRACE_ERROR ("WRONG TLLI TYPE received");
        break;
    }
    GMM_RETURN_ (gmm_data->tlli.current);
  }
} /* gmm_get_tlli */

/*
+------------------------------------------------------------------------------
| Function    : gmm_debug_do_print_gmm_data
+------------------------------------------------------------------------------
| Description : prints gmm data control block
|
| Parameters  : print mask: select type of information to be printed
|
+------------------------------------------------------------------------------
*/
GLOBAL void gmm_debug_do_print_gmm_data(GMM_DEBUG_PRINT_MASK_ENUM_TYPE print_mask)
{
   /*
    * COMMON
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_COMMON)
   {
      TRACE_1_DATA("* Version : %u", gmm_data->version);
      TRACE_1_DATA("*  Cipher : %u", gmm_data->cipher);
   }
   /*
    * STATE
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_STATE)
   {
#ifndef NTRACE
      TRACE_1_DATA("* Kern State : %s", gmm_data->kern.state_name);
      TRACE_1_DATA("*   TX State : %s", gmm_data->tx.state_name);
      TRACE_1_DATA("*   RX State : %s", gmm_data->rx.state_name);
      TRACE_1_DATA("*  RDY State : %s", gmm_data->rdy.state_name);
      TRACE_1_DATA("* SYNC State : %s", gmm_data->sync.state_name);
#endif
   }
   /*
    * TLLI
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_TLLI)
   {
      TRACE_1_DATA("* TLLI current : %#x", gmm_data->tlli.current);
      TRACE_1_DATA("* TLLI old     : %#x", gmm_data->tlli.old);
      switch (gmm_data->tlli.current_type)
      {
      case LOCAL_TLLI:   TRACE_0_DATA("* TLLI type    : LOCAL"); break;
      case FOREIGN_TLLI: TRACE_0_DATA("* TLLI type    : FOREIGN"); break;
      case RANDOM_TLLI:  TRACE_0_DATA("* TLLI type    : RANDOM"); break;
      case CURRENT_TLLI: TRACE_0_DATA("* TLLI type    : CURRENT"); break;
      case OLD_TLLI:     TRACE_0_DATA("* TLLI type    : OLD"); break;
      case INVALID_TLLI: TRACE_0_DATA("* TLLI type    : INVALID"); break;
      default:
          TRACE_1_DATA("* TLLI type    : %u unknown!", gmm_data->tlli.current_type);
      }
   }
   /*
    * IMSI
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_IMSI)
   {
      TRACE_8_DATA("* IMSI[]: %1d %1d %1d %1d  %1d %1d %1d %1d", 
         gmm_data->imsi.id[0], gmm_data->imsi.id[1],
         gmm_data->imsi.id[2], gmm_data->imsi.id[3],
         gmm_data->imsi.id[4], gmm_data->imsi.id[5],
         gmm_data->imsi.id[6], gmm_data->imsi.id[7]);
      TRACE_8_DATA("* IMSI[]: %1d %1d %1d %1d  %1d %1d %1d %1d", 
         gmm_data->imsi.id[8], gmm_data->imsi.id[9],
         gmm_data->imsi.id[10], gmm_data->imsi.id[11],
         gmm_data->imsi.id[12], gmm_data->imsi.id[13],
         gmm_data->imsi.id[14], gmm_data->imsi.id[15]);
   }
   /*
    * P-TMSI
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_PTMSI)
   {
      TRACE_1_DATA("* PTMSI current: %#x", gmm_data->ptmsi.current);
      TRACE_1_DATA("* PTMSI old    : %#x", gmm_data->ptmsi.old);
      TRACE_1_DATA("* PTMSI grr    : %#x", gmm_data->ptmsi.new_grr);
   }
   /*
    * CID
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_CID)
   {
      TRACE_0_DATA("* kern.                     cid    rac    lac mcc mnc");
      TRACE_9_DATA("*                cell_id %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x", 
         gmm_data->kern.cell_id.cid,
         gmm_data->kern.cell_id.rac,
         gmm_data->kern.cell_id.lac,
         gmm_data->kern.cell_id.plmn.mcc[0],
         gmm_data->kern.cell_id.plmn.mcc[1],
         gmm_data->kern.cell_id.plmn.mcc[2],
         gmm_data->kern.cell_id.plmn.mnc[0],
         gmm_data->kern.cell_id.plmn.mnc[1],
         gmm_data->kern.cell_id.plmn.mnc[2]);
      TRACE_9_DATA("*            mm_cell_env %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x",
         gmm_data->kern.mm_cell_env.cid,
         gmm_data->kern.mm_cell_env.rai.rac,
         gmm_data->kern.mm_cell_env.rai.lac,
         gmm_data->kern.mm_cell_env.rai.plmn.mcc[0],
         gmm_data->kern.mm_cell_env.rai.plmn.mcc[1],
         gmm_data->kern.mm_cell_env.rai.plmn.mcc[2],
         gmm_data->kern.mm_cell_env.rai.plmn.mnc[0],
         gmm_data->kern.mm_cell_env.rai.plmn.mnc[1],
         gmm_data->kern.mm_cell_env.rai.plmn.mnc[2]);
      TRACE_9_DATA("*      sig_cell_info.env %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x",
         gmm_data->kern.sig_cell_info.env.cid,
         gmm_data->kern.sig_cell_info.env.rai.rac,
         gmm_data->kern.sig_cell_info.env.rai.lac,
         gmm_data->kern.sig_cell_info.env.rai.plmn.mcc[0],
         gmm_data->kern.sig_cell_info.env.rai.plmn.mcc[1],
         gmm_data->kern.sig_cell_info.env.rai.plmn.mcc[2],
         gmm_data->kern.sig_cell_info.env.rai.plmn.mnc[0],
         gmm_data->kern.sig_cell_info.env.rai.plmn.mnc[1],
         gmm_data->kern.sig_cell_info.env.rai.plmn.mnc[2]);
      TRACE_9_DATA("*  old_sig_cell_info.env %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x",
         gmm_data->kern.old_sig_cell_info.env.cid,
         gmm_data->kern.old_sig_cell_info.env.rai.rac,
         gmm_data->kern.old_sig_cell_info.env.rai.lac,
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mcc[0],
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mcc[1],
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mcc[2],
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mnc[0],
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mnc[1],
         gmm_data->kern.old_sig_cell_info.env.rai.plmn.mnc[2]);
      TRACE_0_DATA("* sync.                     cid    rac    lac mcc mnc");
      TRACE_8_DATA("*           mm_cell_info %#6x ------ %#6x %1x%1x%1x %1x%1x%1x",
         gmm_data->sync.mm_cell_info.cid,
         gmm_data->sync.mm_cell_info.lac,
         gmm_data->sync.mm_cell_info.plmn.mcc[0],
         gmm_data->sync.mm_cell_info.plmn.mcc[1],
         gmm_data->sync.mm_cell_info.plmn.mcc[2],
         gmm_data->sync.mm_cell_info.plmn.mnc[0],
         gmm_data->sync.mm_cell_info.plmn.mnc[1],
         gmm_data->sync.mm_cell_info.plmn.mnc[2]);
      TRACE_9_DATA("* grr_cell_info.cell_env %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x", 
         gmm_data->sync.grr_cell_info.cell_env.cid, 
         gmm_data->sync.grr_cell_info.cell_env.rai.rac, 
         gmm_data->sync.grr_cell_info.cell_env.rai.lac,
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mcc[0],
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mcc[1],
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mcc[2],
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mnc[0],
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mnc[1],
         gmm_data->sync.grr_cell_info.cell_env.rai.plmn.mnc[2]);
      TRACE_9_DATA("*      sig_cell_info.env %#6x %#6x %#6x %1x%1x%1x %1x%1x%1x",
         gmm_data->sync.sig_cell_info.env.cid,
         gmm_data->sync.sig_cell_info.env.rai.rac, 
         gmm_data->sync.sig_cell_info.env.rai.lac,
         gmm_data->sync.sig_cell_info.env.rai.plmn.mcc[0],
         gmm_data->sync.sig_cell_info.env.rai.plmn.mcc[1],
         gmm_data->sync.sig_cell_info.env.rai.plmn.mcc[2],
         gmm_data->sync.sig_cell_info.env.rai.plmn.mnc[0],
         gmm_data->sync.sig_cell_info.env.rai.plmn.mnc[1],
         gmm_data->sync.sig_cell_info.env.rai.plmn.mnc[2]);

      TRACE_0_DATA("* kern.attach_cap.                 rac    lac mcc mnc");
      TRACE_8_DATA("*           rai_accepted        %#6x %#6x %1x%1x%1x %1x%1x%1x", 
         gmm_data->kern.attach_cap.rai_accepted.rac,
         gmm_data->kern.attach_cap.rai_accepted.lac,
         gmm_data->kern.attach_cap.rai_accepted.mcc[0],
         gmm_data->kern.attach_cap.rai_accepted.mcc[1],
         gmm_data->kern.attach_cap.rai_accepted.mcc[2],
         gmm_data->kern.attach_cap.rai_accepted.mnc[0],
         gmm_data->kern.attach_cap.rai_accepted.mnc[1],
         gmm_data->kern.attach_cap.rai_accepted.mnc[2]);
   }
   /*
    * RAI
    */
   /*
    * KERN ATTACH CAPABILITIES
    */
   if (print_mask & GMM_DEBUG_PRINT_MASK_KERN_ATTACH)
   {
   }
}