view src/g23m-aci/aci/psa_l2rs.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 :  GSM-PS (6147)
|  Modul   :  PSA_L2RS
+-----------------------------------------------------------------------------
|  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 layer 2 relay.
+-----------------------------------------------------------------------------
*/

#ifdef DTI

#ifndef PSA_L2RS_C
#define PSA_L2RS_C
#endif

#include "aci_all.h"

/*==== INCLUDES ===================================================*/
#include "dti.h"
#include "dti_conn_mng.h"
#include "dti_cntrl_mng.h"

#include "aci_cmh.h"
#include "ati_cmd.h"
#include "aci_cmd.h"
#include "aci.h"

#include "psa.h"
#include "psa_l2r.h"
#include "cmh.h"
#include "aci_fd.h"
#include "cmh_ra.h"
#include "cmh_l2r.h"
#include "psa_uart.h"

#if defined (FF_WAP) || defined (FF_GPF_TCPIP) || defined (FF_SAT_E)
#include "wap_aci.h"
#include "psa_ppp_w.h"
#endif /* defined (FF_WAP) || defined (FF_GPF_TCPIP) */
#include "aci_lst.h"

#include "aci_lst.h"

#ifdef FF_PSI
#include "psa_psi.h"
#include "cmh_psi.h"
#include "ati_src_psi.h"
#endif /*FF_PSI*/
#include "psa_util.h"

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


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


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


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


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


/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)    MODULE  : PSA_L2R                      |
|                            ROUTINE : psaL2R_Activate              |
+-------------------------------------------------------------------+

  PURPOSE : Activate L2R.

*/

GLOBAL SHORT psaL2R_Activate(UBYTE owner)
{
#define X l2rShrdPrm.set_prm[owner]

  TRACE_FUNCTION ("psaL2R_Activate()");

  /* owner belongs to PSA and not to CMH */
  l2rShrdPrm.owner = owner;

  switch (l2rShrdPrm.state)
  {
    case L2R_DEACTIVATED:
    {
      PALLOC (l2r_activate_req, L2R_ACTIVATE_REQ);

      l2r_activate_req->k_ms_iwf        = X.k_ms_iwf;
      l2r_activate_req->k_iwf_ms        = X.k_iwf_ms;
      l2r_activate_req->t1              = X.t1;
      l2r_activate_req->t2              = L2R_T2_DEF;
      l2r_activate_req->n2              = X.n2;
      l2r_activate_req->pt              = L2R_PT_DEF;
      l2r_activate_req->p0              = X.p0;
      l2r_activate_req->p1              = X.p1;
      l2r_activate_req->p2              = X.p2;
      l2r_activate_req->uil2p           = X.uil2p;
      l2r_activate_req->bytes_per_prim  = L2R_BYTES_PER_PRIM_DEF;
      l2r_activate_req->buffer_size     = L2R_BUFFER_SIZE_DEF;
      l2r_activate_req->rate            = X.rate;

      l2rShrdPrm.set_prm[l2rShrdPrm.owner].reset = 0;

      memcpy (&X, &l2rShrdPrm.set_prm_use, sizeof (T_L2R_SET_PRM));

      l2rShrdPrm.state = L2R_ACTIVATE;

      PSENDX (L2R, l2r_activate_req);

      break;
    }

    default:
    {
      cmhL2R_Failure();

      return -1;
    }
  }

  return 0;

#undef X
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)    MODULE  : PSA_L2R                      |
|                            ROUTINE : psaL2R_Deactivate            |
+-------------------------------------------------------------------+

  PURPOSE : Deactivate L2R.

*/

GLOBAL SHORT psaL2R_Deactivate(void)
{
  TRACE_FUNCTION ("psaL2R_Deactivate()");

  switch (l2rShrdPrm.state)
  {
    case L2R_ENABLED:
    {
      T_DTI_CONN_LINK_ID link_id = dti_cntrl_get_link_id( DTI_ENTITY_L2R, DTI_INSTANCE_NOTPRESENT, DTI_SUB_NO_NOTPRESENT );
      PALLOC (l2r_dti_req, L2R_DTI_REQ);

      l2r_dti_req->dti_conn = L2R_DISCONNECT_DTI;
      l2rShrdPrm.uart_conn = L2R_DISCONNECT_DTI;
      l2r_dti_req->link_id = link_id;
      l2rShrdPrm.state = L2R_DETACH;

      PSENDX (L2R, l2r_dti_req);
      break;
    }

    case L2R_CONNECTED:
    case L2R_ENABLE:
    case L2R_ACTIVATE:
    case L2R_CONNECT:
    {
      PALLOC (l2r_deactivate_req, L2R_DEACTIVATE_REQ);

      l2rShrdPrm.state = L2R_DEACTIVATE;

      PSENDX (L2R, l2r_deactivate_req);
      break;
    }

/* Changed for OMAPS00049111 */
#if defined (FF_SAT_E) || defined (_SIMULATION_)
    case L2R_DEACTIVATED:
      return -1;
#endif /* FF_SAT_E */
  }

  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)    MODULE  : PSA_L2R                      |
|                            ROUTINE : psaL2R_Enable                |
+-------------------------------------------------------------------+

  PURPOSE : Enable L2R.

*/

GLOBAL SHORT psaL2R_Enable( T_DTI_CONN_LINK_ID  link_id, UBYTE peer )
{
  UBYTE dti_id = EXTRACT_DTI_ID( link_id );

  TRACE_EVENT ("psaL2R_Enable()");

  switch (l2rShrdPrm.state)
  {
    case L2R_CONNECTED:
    {
      PALLOC (l2r_dti_req, L2R_DTI_REQ);

      l2r_dti_req->dti_conn = L2R_CONNECT_DTI;
      l2rShrdPrm.uart_conn  = L2R_CONNECT_DTI;
      l2r_dti_req->link_id  = link_id;

      l2rShrdPrm.state = L2R_ENABLE;

#if defined (FF_WAP) || defined (FF_GPF_TCPIP) || defined (FF_SAT_E)
      if (Wap_Call)
      {
        strcpy((char*)l2r_dti_req->entity_name, PPP_NAME);
        l2r_dti_req->dti_direction = DTI_CHANNEL_TO_HIGHER_LAYER;
      }
      else
      {
#endif /* FF_WAP OR FF_GPF_TCPIP or SAT E */
        if (IS_SRC_BT(dti_id))
        {
          TRACE_EVENT("psa_l2rs - BT_ADAPTER Act");
          strcpy((char*)l2r_dti_req->entity_name, BTI_NAME);
          l2r_dti_req->dti_direction   = DTI_CHANNEL_TO_HIGHER_LAYER;
        }
        else if ((peer EQ DTI_ENTITY_PPPC) OR
                  (peer EQ DTI_ENTITY_AAA)
#ifdef FF_SAT_E
                  OR (peer EQ DTI_ENTITY_SIM)
#endif /* FF_SAT_E */
                  )
        {
          strcpy((char*)l2r_dti_req->entity_name, dti_entity_name[peer].name);
          l2r_dti_req->dti_direction = DTI_CHANNEL_TO_HIGHER_LAYER;
        }
        else
        {
          if (peer EQ DTI_ENTITY_UART)
            strcpy((char*)l2r_dti_req->entity_name,UART_NAME);
          else
            strcpy((char*)l2r_dti_req->entity_name,PSI_NAME);
          l2r_dti_req->dti_direction   = DTI_CHANNEL_TO_LOWER_LAYER;
        }
#if defined (FF_WAP) || defined (FF_GPF_TCPIP) || defined (FF_SAT_E)
      }
#endif /* FF_WAP || FF_GPF_TCPIP || SAT E */

      if (dti_cntrl_set_conn_parms(link_id, DTI_ENTITY_L2R, DTI_INSTANCE_NOTPRESENT, DTI_SUB_NO_NOTPRESENT) EQ FALSE)
      {
        return -1;
      }

      PSENDX (L2R, l2r_dti_req);

      break;
    }

    case L2R_ENABLE:
    {
      PALLOC (l2r_disc_req, L2R_DISC_REQ);

      l2rShrdPrm.state = L2R_DISCONNECT;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_disc_req);

      break;
    }

    case L2R_ACTIVATE:
    case L2R_CONNECT:
    {
      PALLOC (l2r_deactivate_req, L2R_DEACTIVATE_REQ);

      l2rShrdPrm.state = L2R_DEACTIVATE;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_deactivate_req);

      break;
    }

    default:
    {
      cmhL2R_Failure();

      return -1;
    }
  }

  return 0;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)    MODULE  : PSA_L2R                      |
|                            ROUTINE : psaL2R_Disable               |
+-------------------------------------------------------------------+

  PURPOSE : Disable L2R.

*/

/* Not sure whether this function is needed or not !!

  GLOBAL SHORT psaL2R_Disable(void)
{
  TRACE_FUNCTION ("psaL2R_Disable()");

  switch (l2rShrdPrm.state)
  {
    case L2R_ENABLED:
    {
      PALLOC (l2r_dti_req, L2R_DTI_REQ);

      l2r_dti_req->dti_conn = L2R_DISCONNECT_DTI;
      l2rShrdPrm.uart_conn = L2R_DISCONNECT_DTI;

      l2rShrdPrm.state = L2R_DISABLE;

      PSENDX (L2R, l2r_dti_req);

      break;
    }

    case L2R_CONNECTED:
    case L2R_ENABLE:
    {
      PALLOC (l2r_disc_req, L2R_DISC_REQ);

      l2rShrdPrm.state = L2R_DISCONNECT;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_disc_req);

      break;
    }

    case L2R_ACTIVATE:
    case L2R_CONNECT:
    {
      PALLOC (l2r_deactivate_req, L2R_DEACTIVATE_REQ);

      l2rShrdPrm.state = L2R_DEACTIVATE;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_deactivate_req);

      break;
    }

    default:
    {
      cmhL2R_Failure();

      return -1;
    }
  }

  return 0;
}  */



/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)    MODULE  : PSA_L2R                      |
|                            ROUTINE : psaL2R_ESC                   |
+-------------------------------------------------------------------+

  PURPOSE : ESC.

*/

GLOBAL SHORT psaL2R_ESC( UBYTE src_id )
{
#ifdef FF_PSI
  T_ACI_DTI_PRC_PSI *src_infos = find_element (psi_src_params, src_id, cmhPSItest_srcId);
#endif /*FF_PSI*/
  TRACE_EVENT ("psaL2R_ESC()");


  switch (l2rShrdPrm.state)
  {
    case L2R_ENABLED:
    {
    T_DTI_ENTITY_ID entity_list[] = {DTI_ENTITY_ACI};
#ifdef FF_PSI
      if (src_infos NEQ NULL)
        dti_cntrl_est_dpath_indirect ( src_id,
                                     entity_list,
                                     1,
                                     SPLIT,
                                     atiPSI_dti_cb,
                                     DTI_CPBLTY_CMD,
                                     DTI_CID_NOTPRESENT);
      else
#endif /*FF_PSI*/
        dti_cntrl_est_dpath_indirect ( src_id,
                                     entity_list,
                                     1,
                                     SPLIT,
                                     atiUART_dti_cb,
                                     DTI_CPBLTY_CMD,
                                     DTI_CID_NOTPRESENT);

      l2rShrdPrm.state = L2R_ESCAPE;
      break;
    }
    case L2R_CONNECTED:
    case L2R_ENABLE:
    {
      PALLOC (l2r_disc_req, L2R_DISC_REQ);

      l2rShrdPrm.state = L2R_DISCONNECT;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_disc_req);

      break;
    }

    case L2R_ACTIVATE:
    case L2R_CONNECT:
    {
      PALLOC (l2r_deactivate_req, L2R_DEACTIVATE_REQ);

      l2rShrdPrm.state = L2R_DEACTIVATE;

      cmhL2R_Failure();

      PSENDX (L2R, l2r_deactivate_req);

      break;
    }

    default:
    {
      cmhL2R_Failure();

      break;
    }
  }

  return 0;
}

#endif /* DTI */
/*==== EOF ========================================================*/