view src/g23m-aci/aci/psa_snds.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 :  
|  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 defines the signalling functions of the
|             protocol stack adapter for the registration part of
|             the SNDCP entity.
+----------------------------------------------------------------------------- 
*/ 

#if defined (GPRS) && defined (DTI)

#ifndef PSA_SNDS_C
#define PSA_SNDS_C
#endif

#include "aci_all.h"
/*==== INCLUDES ===================================================*/
#include "aci.h"

#include "dti.h"      /* functionality of the dti library */
#include "aci_cmh.h"
#include "ati_cmd.h"
#include "aci_cmd.h"
#include "aci_mem.h"

#include "aci.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 "cmh.h"
#include "cmh_sm.h"

#if defined(FF_WAP)  || defined(FF_GPF_TCPIP)
#include "wap_aci.h"
#include "psa_tcpip.h"
#endif



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

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

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

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

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


/*
+-------------------------------------------------------------------+
| PROJECT : GPRS (8441)           MODULE  : PSA_SMS                 |
| STATE   : finished              ROUTINE : psaSNDCP_Dti_Req        |
+-------------------------------------------------------------------+

  PURPOSE : Request of setting or removing the DTI user plane..

*/
GLOBAL void psa_sn_dti_req( T_DTI_CONN_LINK_ID  link_id, T_DTI_ENTITY_ID peer, U8 dti_conn )
{
  T_PDP_CONTEXT_INTERNAL *p_pdp_context_node = pdp_context_find_node_from_cid(work_cids[cid_pointer]);  /* Issue 27457 */
#ifdef _SIMULATION_
  U8 *dti_neighbor = NULL;
#endif

#if defined (FF_WAP) || defined (FF_GPF_TCPIP)
  U8 cid = PDP_CONTEXT_CID_OMITTED;
  U8 nsapi;
#endif

  U8 dti_direction = NAS_HOME;

  PALLOC (sn_dti_req, SN_DTI_REQ);

  TRACE_FUNCTION("psa_sn_dti_req()");

#ifdef _SIMULATION_
  ACI_MALLOC(dti_neighbor, NAS_SIZE_ENTITY_NAME);
#endif

  if (dti_conn EQ NAS_CONNECT_DTI)
  {

    switch ( peer )
    {
      case DTI_ENTITY_PPPS:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), PPP_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)PPP_NAME;
#endif        
        dti_direction = NAS_HOME;
        p_pdp_context_node->internal_data.entity_id = peer;
        p_pdp_context_node->internal_data.link_id   = link_id;
        break;

#ifdef TI_DUAL_MODE
      case DTI_ENTITY_SNDCP:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), SNDCP_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)SNDCP_NAME;
#endif
        dti_direction = NAS_HOME;
        break;
#endif /* TI_DUAL_MODE */

#ifdef FF_TCP_IP
      case DTI_ENTITY_AAA:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), RIV_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)RIV_NAME;
#endif        
        dti_direction = NAS_NEIGHBOR;
        p_pdp_context_node->internal_data.entity_id = peer;
        p_pdp_context_node->internal_data.link_id   = link_id;
        break;
#endif /* FF_TCP_IP */

      case DTI_ENTITY_IP:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), IP_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)IP_NAME;
#endif
        dti_direction = NAS_NEIGHBOR;
        p_pdp_context_node->internal_data.link_id = link_id;
        break;
      case DTI_ENTITY_SIM:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), SIM_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)SIM_NAME;
#endif
        dti_direction = NAS_NEIGHBOR;
        p_pdp_context_node->internal_data.link_id = link_id;
        break;
      case DTI_ENTITY_PKTIO:

#ifdef _SIMULATION_
        strcpy((char*)(dti_neighbor), PKTIO_NAME);
#else
        sn_dti_req->dti_neighbor = (ULONG)PKTIO_NAME;
#endif
        dti_direction = NAS_HOME;
        p_pdp_context_node->internal_data.entity_id = peer;
        p_pdp_context_node->internal_data.link_id   = link_id;
        break;
#ifdef FF_GPF_TCPIP
      case DTI_ENTITY_TCPIP:
        sn_dti_req->dti_neighbor = (ULONG)TCPIP_NAME;
        dti_direction = NAS_NEIGHBOR;
        break;
#endif /* FF_GPF_TCPIP */

    }

    /* Copy the neighbor name (incl. the zero termination). */
#ifdef _SIMULATION_
    memcpy( &sn_dti_req->dti_neighbor, dti_neighbor, strlen((const char *)dti_neighbor) + 1 );
    ACI_MFREE( dti_neighbor );
#endif
    sn_dti_req->dti_direction = dti_direction;
    sn_dti_req->dti_conn      = NAS_CONNECT_DTI;
  }
  else /* if (dti_conn == SNDCP_CONNECT_DTI) */
  {
    sn_dti_req->dti_conn   = NAS_DISCONNECT_DTI;
  }

  sn_dti_req->dti_linkid    = link_id;
  sn_dti_req->nsapi         = (U8)CID_TO_NSAPI( gaci_get_cid_over_link_id( link_id ) );
#if defined (FF_WAP) || defined (FF_GPF_TCPIP)
  nsapi = sn_dti_req->nsapi;
#endif
  PSEND(hCommSNDCP, sn_dti_req);
#if defined (FF_WAP) || defined (FF_GPF_TCPIP)
  if ( (Wap_Call)                    AND
       (dti_conn EQ NAS_CONNECT_DTI) )   /* TC ACISAT 530 */
  {
    cid = (U8)NSAPI_TO_CID( nsapi );
    if ( (get_state_over_cid( cid ) EQ PDP_CONTEXT_STATE_DEFINED ) OR
         (get_state_over_cid( cid ) EQ PDP_CONTEXT_STATE_ATTACHING) OR 
         (get_state_over_cid( cid ) EQ PDP_CONTEXT_STATE_DEACTIVATE_NORMAL) )  //// pinghua DCM_OPEN_CLOSE patch 20080429 start
    {
      cmhSM_activate_context();
    }
    else if ( (get_state_over_cid( cid ) EQ PDP_CONTEXT_STATE_ACTIVATED))
    {
      char c_ip_address[16];
      UBYTE* ip_address;

      TRACE_EVENT("No PDP Context Found to Activate");

      ip_address = p_pdp_context_node->internal_data.pdp_address_allocated.ip_address.ipv4_addr.a4;
      sprintf (c_ip_address, "%03u.%03u.%03u.%03u", ip_address[0],
                                                    ip_address[1],
                                                    ip_address[2],
                                                    ip_address[3] );


      psaTCPIP_Configure( NULL,
                          (UBYTE*) c_ip_address,
  	    	                NULL, 
                          NULL,
                          NULL,
                          1500, 
                          cmhSM_IP_activate_cb );     
    }
  }
#endif /* FF_WAP */
}
#endif /* GPRS */