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view src/g23m-gprs/sndcp/sndcp_suap.c @ 268:f2e52cab0a73

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abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 13 Jun 2021 18:17:53 +0000
parents fa8dc04885d8
children
line wrap: on
line source

/* 
+----------------------------------------------------------------------------- 
|  Project :  GPRS (8441)
|  Modul   :  sndcp_suap.c
+----------------------------------------------------------------------------- 
|  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 SNDCP and implements all 
|             functions to handles the incoming primitives as described in 
|             the SDL-documentation (SUA-statemachine)
+----------------------------------------------------------------------------- 
*/ 

#define ENTITY_SNDCP 

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

#include "typedefs.h"    /* to get Condat data types */
#include "vsi.h"        /* to get a lot of macros */
#include "macdef.h"
#include "prim.h"       /* to get the definitions of used SAP and directions */

#include "dti.h"

#include "sndcp.h"        /* to get the global entity definitions */
#include "sndcp_f.h"       /* to get the functions to access the global arrays*/

#include "sndcp_suaf.h"     /* to get internal functions of service sua */
#include "sndcp_nus.h"     /* to get signal functions to service nu */


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

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

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

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



/*
+------------------------------------------------------------------------------
| Function    : sua_ll_data_cnf
+------------------------------------------------------------------------------
| Description : Handles the primitive LL_DATA_CNF
|
| Parameters  : *ll_data_cnf - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void sua_ll_data_cnf ( T_LL_DATA_CNF *ll_data_cnf )
{ 
  BOOL complete = FALSE;
  BOOL found = FALSE;
  T_SEG_INFO* help = NULL;
  T_SEG_INFO* last_help = NULL;
  UBYTE sapi_index = 0;
  UBYTE refi = 0;

  TRACE_FUNCTION( "sua_ll_data_cnf" );

   /*
    * set service instance according to sapi in primitive
    */
  sndcp_get_sapi_index(ll_data_cnf->sapi, &sapi_index);
  sndcp_data->sua = & sndcp_data->sua_base[sapi_index];

  TRACE_EVENT_P1("ll_data_cnf->c_reference1: %d", ll_data_cnf->c_reference1);
  
  switch( GET_STATE( SUA ) )
  {
    case SUA_LLC_NOT_RECEPTIVE_SUSPEND:
    case SUA_LLC_RECEPTIVE_SUSPEND:
    case SUA_LLC_NOT_RECEPTIVE:
    case SUA_LLC_RECEPTIVE:
      for (refi = 0; refi < ll_data_cnf->c_reference1; refi++) {
        complete = FALSE;
        found = FALSE;
        last_help = NULL;
        help = sndcp_data->sua->first_seg_info;
        if (help == NULL) {
          /*
           * There are no N-PDUs buffered. CNF must be wrong.
           */
          if (ll_data_cnf != NULL) {
            TRACE_EVENT("There are no N-PDUs buffered. CNF must be wrong.");
            PFREE(ll_data_cnf);
          }
          return;
        }
        while (help != NULL && !found) {
          TRACE_EVENT_P1("ll_data_cnf->reference1[refi].ref_nsapi: %d",
                         ll_data_cnf->reference1[refi].ref_nsapi);
          TRACE_EVENT_P1("ll_data_cnf->reference1[refi].ref_npdu_num: %d",
                         ll_data_cnf->reference1[refi].ref_npdu_num);
          TRACE_EVENT_P1("ll_data_cnf->reference1[refi].ref_seg_num: %d",
                         ll_data_cnf->reference1[refi].ref_seg_num);
          if (ll_data_cnf->reference1[refi].ref_nsapi == help->nsapi &&
            ll_data_cnf->reference1[refi].ref_npdu_num == help->npdu_number) 
          {
            TRACE_EVENT_P1("ll_data_cnf->reference1[refi].ref_seg_num: %d",
                           ll_data_cnf->reference1[refi].ref_seg_num);
            TRACE_EVENT_P1("old help->cnf_segments: %d", help->cnf_segments);
            help->cnf_segments += 
              1 << ll_data_cnf->reference1[refi].ref_seg_num;
            TRACE_EVENT_P1("new help->cnf_segments: %d", help->cnf_segments);
            found = TRUE;
          }
          last_help = help;
          help = help->next;
        }
        if (!found) {
          /*
           * No affected NPDU found.
           */
          if (ll_data_cnf != NULL) {
            TRACE_EVENT("No affected NPDU found.");
            PFREE(ll_data_cnf);
          }
          return;
        }

        /*
         * If the affected N-PDU is completely confirmed, notify service nu and
         * free last_help.
         */

        TRACE_EVENT_P1("last_help->number_of_segments: %d", 
                       last_help->number_of_segments);
        TRACE_EVENT_P1("last_help->cnf_segments: %d", 
                       last_help->cnf_segments);

        if (last_help->number_of_segments == SNDCP_SEGMENT_NUMBERS_ACK) {
          if (last_help->cnf_segments ==
            SNDCP_MAX_COMPLETE /*4294967295 == 2**32 - 1*/) {
            complete = TRUE;
          }
        } else if (last_help->cnf_segments == 
          ((ULONG)(1 << last_help->number_of_segments) - 1)) {
          complete = TRUE;
        }
        if (complete) {
          /*
           * Notify service nu.
           */
          sig_sua_nu_data_cnf
            (ll_data_cnf->reference1[refi].ref_nsapi, 
            (UBYTE)ll_data_cnf->reference1[refi].ref_npdu_num);
          /*
           * Free last_help.
           */
          help = sndcp_data->sua->first_seg_info;
          if (help == last_help) {
            sndcp_data->sua->first_seg_info = help->next;
            MFREE(help);
            help = NULL;
          } else {
            T_SEG_INFO* help_next = help->next;
            while (help->next != last_help) {
              help = help->next;
            }
            help_next = help->next;
            help->next = help_next->next;
            MFREE (help_next);
          }
        }
      } /* for refi */
      break;
    default:
      TRACE_ERROR( "LL_DATA_CNF unexpected" );
      break;
  }
  if (ll_data_cnf != NULL) {
    PFREE(ll_data_cnf);
  }

} /* sua_ll_data_cnf() */


#ifdef _SNDCP_DTI_2_
/*
+------------------------------------------------------------------------------
| Function    : sua_ll_ready_ind
+------------------------------------------------------------------------------
| Description : Handles the primitive LL_READY_IND
|
| Parameters  : *ll_ready_ind - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void sua_ll_ready_ind ( T_LL_READY_IND *ll_ready_ind )
{ 
  U8 sapi_index = 0;

  TRACE_FUNCTION( "sua_ll_ready_ind" );

   /*
    * set service instance according to sapi in primitive
    */
  sndcp_get_sapi_index(ll_ready_ind->sapi, &sapi_index);
  sndcp_data->sua = & sndcp_data->sua_base[sapi_index];

  switch( GET_STATE( SUA ) )
  {
    case SUA_LLC_NOT_RECEPTIVE_SUSPEND:
      /*
       * Is queue with outgoing LL_DESC_REQs empty?
       */
      if (sndcp_data->sua->ll_desc_q_read ==
          sndcp_data->sua->ll_desc_q_write) {
        if (sndcp_data->sua->cia_state == CIA_IDLE) {
          sua_next_sn_data_req(ll_ready_ind->sapi);
        }
      }
      SET_STATE(SUA, SUA_LLC_RECEPTIVE_SUSPEND);
      break;
    case SUA_LLC_RECEPTIVE_SUSPEND:
      break;
    case SUA_LLC_NOT_RECEPTIVE:
      /*
       * Is queue with outgoing LL_DESC_REQs empty?
       */
      if (sndcp_data->sua->ll_desc_q_read ==
          sndcp_data->sua->ll_desc_q_write) {
        SET_STATE(SUA, SUA_LLC_RECEPTIVE);
        if (sndcp_data->sua->cia_state == CIA_IDLE) {
          sua_next_sn_data_req(ll_ready_ind->sapi);
        }
      } else { /* sndcp_data->sua.ll_desc_q is not empty */
        /*
         * Send next ll_desc_req from queue.
         */
        T_LL_DESC_REQ* ll_desc_req = 
          sndcp_data->sua->ll_desc_q[sndcp_data->sua->ll_desc_q_read];
        
        U8 ll_desc_sapi    = ll_desc_req->sapi;
        U8 ll_desc_seg_pos = ll_desc_req->seg_pos;
        U8 ll_desc_nsapi   = sua_get_nsapi(ll_desc_req);

        sndcp_data->sua->ll_desc_q[sndcp_data->sua->ll_desc_q_read] = NULL;
        sndcp_data->sua->ll_desc_q_read =
          (sndcp_data->sua->ll_desc_q_read + 1) % SNDCP_SEGMENT_NUMBERS_ACK;

#ifdef _SIMULATION_
        su_send_ll_data_req_test(ll_desc_req);
#else /* _SIMULATION_ */ 
        PSEND(hCommLLC, ll_desc_req);
#endif /* _SIMULATION_ */

        if ((ll_desc_seg_pos & SEG_POS_LAST) > 0) {
          sig_sua_nu_ready_ind( ll_desc_nsapi );
          sua_next_sn_data_req( ll_desc_sapi );
          sndcp_data->sua->cia_state = CIA_IDLE;
        }


      } /* sndcp_data->sua.ll_desc_q is not empty */
      break;
    case SUA_LLC_RECEPTIVE:
      break;
    default:
      TRACE_ERROR( "LL_READY_IND unexpected" );
      break;
  }
  if (ll_ready_ind != NULL) {
    PFREE (ll_ready_ind);
  }

} /* su_ll_ready_ind() */
#else /* _SNDCP_DTI_2_ */
/*
+------------------------------------------------------------------------------
| Function    : sua_ll_ready_ind
+------------------------------------------------------------------------------
| Description : Handles the primitive LL_READY_IND
|
| Parameters  : *ll_ready_ind - Ptr to primitive payload
|
+------------------------------------------------------------------------------
*/
GLOBAL void sua_ll_ready_ind ( T_LL_READY_IND *ll_ready_ind )
{ 
  UBYTE sapi_index = 0;

  TRACE_FUNCTION( "sua_ll_ready_ind" );

   /*
    * set service instance according to sapi in primitive
    */
  sndcp_get_sapi_index(ll_ready_ind->sapi, &sapi_index);
  sndcp_data->sua = & sndcp_data->sua_base[sapi_index];

  switch( GET_STATE( SUA ) )
  {
    case SUA_LLC_NOT_RECEPTIVE_SUSPEND:
      /*
       * Is queue with outgoing LL_DATA_REQs empty?
       */
      if (sndcp_data->sua->ll_data_q_read ==
          sndcp_data->sua->ll_data_q_write) {
        if (sndcp_data->sua->cia_state == CIA_IDLE) {
          sua_next_sn_data_req(ll_ready_ind->sapi);
        }
      }
      SET_STATE(SUA, SUA_LLC_RECEPTIVE_SUSPEND);
      break;
    case SUA_LLC_RECEPTIVE_SUSPEND:
      break;
    case SUA_LLC_NOT_RECEPTIVE:
      /*
       * Is queue with outgoing LL_DATA_REQs empty?
       */
      if (sndcp_data->sua->ll_data_q_read ==
          sndcp_data->sua->ll_data_q_write) {
        SET_STATE(SUA, SUA_LLC_RECEPTIVE);
        if (sndcp_data->sua->cia_state == CIA_IDLE) {
          sua_next_sn_data_req(ll_ready_ind->sapi);
        }
      } else { /* sndcp_data->sua.ll_data_q is not empty */
        /*
         * Send next ll_data_req from queue.
         */
        T_LL_DATA_REQ* ll_data_req = 
          sndcp_data->sua->ll_data_q[sndcp_data->sua->ll_data_q_read];
        
        UBYTE ll_data_sapi    = ll_data_req->sapi;
        UBYTE ll_data_seg_pos = ll_data_req->seg_pos;
        UBYTE ll_data_nsapi   = sua_get_nsapi(ll_data_req);

        sndcp_data->sua->ll_data_q[sndcp_data->sua->ll_data_q_read] = NULL;
        sndcp_data->sua->ll_data_q_read =
          (sndcp_data->sua->ll_data_q_read + 1) % SNDCP_SEGMENT_NUMBERS_ACK;

        PSEND (hCommLLC, ll_data_req);

        if ((ll_data_seg_pos & SEG_POS_LAST) > 0) {
          sig_sua_nu_ready_ind( ll_data_nsapi );
          sua_next_sn_data_req( ll_data_sapi );
          sndcp_data->sua->cia_state = CIA_IDLE;
        }


      } /* sndcp_data->sua.ll_data_q is not empty */
      break;
    case SUA_LLC_RECEPTIVE:
      break;
    default:
      TRACE_ERROR( "LL_READY_IND unexpected" );
      break;
  }
  if (ll_ready_ind != NULL) {
    PFREE (ll_ready_ind);
  }

} /* su_ll_ready_ind() */
#endif /* _SNDCP_DTI_2_ */