view src/g23m-gsm/rr/rr_gprs.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
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 holds the functions for handling primitives
|             sent from entity GRR to entity RR and vice versa.
+-----------------------------------------------------------------------------
*/

#ifndef RR_GPRS_C
#define RR_GPRS_C

#ifdef GPRS

#define ENTITY_RR

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

#include <string.h>
#include <stddef.h>
#include "typedefs.h"
#include "pcm.h"
#include "pconst.cdg"
#include "mconst.cdg"
#include "message.h"
#include "ccdapi.h"
#include "vsi.h"
#include "custom.h"
#include "gsm.h"
#include "prim.h"
#include "cnf_rr.h"
#include "pei.h"
#include "tok.h"
#include "rr_gprs.h"
#include "rr.h"

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

/*==== PRIVATE =====================================================*/
LOCAL void pei_not_supported (void *data);

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

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

LOCAL const T_FUNC rrgrr_table[] = {
  MAK_FUNC_0( dat_rrgrr_channel_req,        RRGRR_CHANNEL_REQ             ), /* 0*/
  MAK_FUNC_0( dat_rrgrr_resumed_tbf_req,    RRGRR_RESUMED_TBF_REQ         ), /* 1*/
  MAK_FUNC_S( dat_rrgrr_data_req,           RRGRR_DATA_REQ                ), /* 2*/
  MAK_FUNC_0( att_rrgrr_start_mon_ccch_req, RRGRR_START_MON_CCCH_REQ      ), /* 3*/
  MAK_FUNC_0( att_rrgrr_stop_mon_ccch_req,  RRGRR_STOP_MON_CCCH_REQ       ), /* 4*/
  MAK_FUNC_0( att_rrgrr_cr_req,             RRGRR_CR_REQ                  ), /* 5*/
  MAK_FUNC_0( att_rrgrr_start_mon_bcch_req, RRGRR_START_MON_BCCH_REQ      ), /* 6*/
  MAK_FUNC_0( dat_rrgrr_rr_est_req,         RRGRR_RR_EST_REQ              ), /* 7*/
  MAK_FUNC_0( dat_rrgrr_rr_est_rsp,         RRGRR_RR_EST_RSP              ), /* 8*/
  MAK_FUNC_N( pei_not_supported,            0                             ), /* 9*/
  MAK_FUNC_0( dat_rrgrr_activate_req,       RRGRR_ACTIVATE_REQ            ), /* A*/
  MAK_FUNC_N( pei_not_supported,            0                             ), /* B*/
  MAK_FUNC_0( dat_rrgrr_gprs_data_req,      RRGRR_GPRS_DATA_REQ           ), /* C*/
  MAK_FUNC_0( dat_rrgrr_suspend_dcch_req,   RRGRR_SUSPEND_DCCH_REQ        ), /* D*/
  MAK_FUNC_0( dat_rrgrr_reconnect_dcch_req, RRGRR_RECONNECT_DCCH_REQ      ), /* E*/
  MAK_FUNC_0( att_check_bsic,               RRGRR_NCELL_SYNC_REQ          ), /* F*/
  MAK_FUNC_0( att_gprs_sync_req,            RRGRR_SYNC_REQ                ), /* 10*/
  MAK_FUNC_N( pei_not_supported,            0                             ), /* 11*/
  MAK_FUNC_0( att_rrgrr_update_ba_req,      RRGRR_UPDATE_BA_REQ           ), /* 12*/
  MAK_FUNC_N( att_rrgrr_meas_rep_req,       RRGRR_MEAS_REP_REQ            ), /* 13*/
  MAK_FUNC_N( pei_not_supported,            RRGRR_TBF_ESTABLISHED_REQ     ), /* 14*/
  MAK_FUNC_0( att_gprs_cr_rsp,              RRGRR_CR_RSP                  ), /* 15*/
  MAK_FUNC_0( att_rrgrr_ext_meas_req,       RRGRR_EXT_MEAS_REQ            ), /* 16*/
  MAK_FUNC_0( att_rrgrr_ext_meas_stop_req,  RRGRR_EXT_MEAS_STOP_REQ       ), /* 17*/
  MAK_FUNC_0( gprs_rrgrr_stop_task,         RRGRR_STOP_TASK_REQ           ), /* 18*/
  MAK_FUNC_0( att_gprs_start_task,          RRGRR_START_TASK_REQ          ), /* 19*/
  MAK_FUNC_0( att_rrgrr_standby_ind,        RRGRR_STANDBY_STATE_IND       ), /* 1A*/
  MAK_FUNC_0( att_rrgrr_ready_ind,          RRGRR_READY_STATE_IND         )  /* 1B*/
#ifdef REL99
  ,
  MAK_FUNC_0( att_rrgrr_cbch_info_ind,      RRGRR_CBCH_INFO_IND           )  /* 1C*/
#endif
};

GLOBAL const char * const    STATE_GPRS_NAME[] = {    STATE_GPRS_NAME_INIT };


/*
+-----------------------------------------------------------------------------+
| PROJECT : GSM-GPRS ()         MODULE  : RR_GPRS                             |
| STATE   : code                ROUTINE : gprs_init_gprs_data                 |
+-----------------------------------------------------------------------------+

  PURPOSE : initialises the RR related GPRS data.

*/

GLOBAL void gprs_init_gprs_data (void)
{
  GET_INSTANCE_DATA;
  TRACE_FUNCTION ("gprs_init_gprs_data()");

  SET_STATE(STATE_GPRS, GPRS_NULL);

  memset(rr_data->gprs_data.rr_sdu,   NOT_PRESENT_8BIT, sizeof(rr_data->gprs_data.rr_sdu));
  memset(rr_data->gprs_data.si13_sdu, NOT_PRESENT_8BIT, sizeof(rr_data->gprs_data.si13_sdu));
  rr_data->gprs_data.tma_in_progress = 0;
  rr_data->gprs_data.fn              = 0;
  rr_data->gprs_data.req_ref_idx     = NOT_PRESENT_8BIT;
  rr_data->gprs_data.page_mode       = PAG_MODE_DEFAULT;
  rr_data->gprs_data.si13_received   = 0;
  rr_data->gprs_data.split_pg        = 0;

  rr_data->gprs_data.cr_type = NOT_PRESENT_8BIT;
  rr_data->gprs_data.cr_orig = NOT_PRESENT_8BIT;
  rr_data->gprs_data.start_proc = START_PROC_NOTHING;

  rr_data->gprs_data.is_nc2_used_in_si13 = FALSE;    /* NC0 is default */
  rr_data->gprs_data.nc_mode_of_pmo      = NC_MODE_RESET; /* Use NC of SI13 */
  rr_data->gprs_data.ready_state         = FALSE;    /* Standby */

  /*rr_data->gprs_data.cr_pbcch_active = 0;*/
  if ( rr_data->gprs_data.dl_data_ind NEQ NULL )
  {
    PFREE ( rr_data->gprs_data.dl_data_ind );
  }
  rr_data->gprs_data.dl_data_ind     = NULL;
#ifdef REL99
  rr_data->gprs_data.cbch_psi_valid = FALSE;
  rr_data->gprs_data.cbch_info_rxvd_in_ptm = FALSE;
  rr_data->gprs_data.nw_release = RR_GPRS_R97;
#endif
  rr_data->gprs_data.ba_bcch_modified= FALSE;
  
}

GLOBAL void gprs_init_data_cr (void)
{
  GET_INSTANCE_DATA;
  if(GET_STATE(STATE_GPRS) NEQ GPRS_NULL)
    SET_STATE(STATE_GPRS, GPRS_ACTIVATED);

  memset(rr_data->gprs_data.rr_sdu,   NOT_PRESENT_8BIT, sizeof(rr_data->gprs_data.rr_sdu));
  memset(rr_data->gprs_data.si13_sdu, NOT_PRESENT_8BIT, sizeof(rr_data->gprs_data.si13_sdu));
  rr_data->gprs_data.tma_in_progress = 0;
  rr_data->gprs_data.fn              = 0;
  rr_data->gprs_data.req_ref_idx     = NOT_PRESENT_8BIT;
  rr_data->gprs_data.page_mode       = PAG_MODE_DEFAULT;
  rr_data->gprs_data.si13_received   = 0;
  rr_data->gprs_data.split_pg        = 0;
  /*rr_data->gprs_data.cr_pbcch_active = 0;*/
  rr_data->gprs_data.cr_type = NOT_PRESENT_8BIT;
  rr_data->gprs_data.cr_orig = NOT_PRESENT_8BIT;
  rr_data->gprs_data.start_proc = START_PROC_NOTHING;
  rr_data->gprs_data.is_nc2_used_in_si13 = FALSE;    /* NC0 is default */
  rr_data->gprs_data.nc_mode_of_pmo      = NC_MODE_RESET; /* Use NC of SI13 */
  /* ready state variable should not be cleared know because it is still needed */ 

  if ( rr_data->gprs_data.dl_data_ind NEQ NULL )
  {
    PFREE ( rr_data->gprs_data.dl_data_ind );
  }
  rr_data->gprs_data.dl_data_ind     = NULL;
#ifdef REL99
  rr_data->gprs_data.cbch_psi_valid = FALSE;
  rr_data->gprs_data.cbch_info_rxvd_in_ptm = FALSE;
  rr_data->gprs_data.nw_release = RR_GPRS_R97;
#endif

}
/*
+-----------------------------------------------------------------------------+
| PROJECT : GSM-GPRS (??6147)     MODULE  : RR_GPRS                           |
| STATE   : code                ROUTINE : gprs_get_table_n                    |
+-----------------------------------------------------------------------------+

  PURPOSE : process jumptable,
  IN      : adresses of table, n
  OUT     : values of rrgrr_table in table, n

*/
void gprs_get_table_n (const T_FUNC **table, USHORT *n)
{
  TRACE_FUNCTION ("gprs_get_table_n()");

  *table = rrgrr_table;
  *n     = TAB_SIZE ( rrgrr_table);
}

/*
+-----------------------------------------------------------------------------+
| PROJECT : GSM-GPRS (6147)     MODULE  : RR_GPRS                             |
| STATE   : code                ROUTINE : gprs_rrgrr_store_sdu                |
+-----------------------------------------------------------------------------+

  PURPOSE :
  IN      :
  OUT     :

*/
void gprs_rrgrr_store_sdu(UBYTE* to, T_sdu* from)
{
   from->o_buf-=8;
   from->l_buf+=8;
   memcpy(to, &from->buf[from->o_buf/8], from->l_buf/8);
}

/*
+-----------------------------------------------------------------------------+
| PROJECT : GSM-GPRS (6147)     MODULE  : RR_GPRS                             |
| STATE   : code                ROUTINE : gprs_rrgrr_fill_from_stored_sdu     |
+-----------------------------------------------------------------------------+

  PURPOSE :
  IN      :
  OUT     :

*/
void gprs_rrgrr_fill_from_stored_sdu(T_sdu* sdu, UBYTE* from)
{
        /*
         * copy message content
         */
        sdu->l_buf = 22*8;
#if defined (_SIMULATION_)
        sdu->o_buf = 0*8;
#else
        sdu->o_buf = 1*8;
#endif

        memcpy(sdu->buf, from, MAX_L2_FRAME_SIZE);/*lint !e419 Apparent data overrun for function*/
}

/*
+--------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)              MODULE  : RR_PEI              |
| STATE   : code                       ROUTINE : pei_not_supported   |
+--------------------------------------------------------------------+

  PURPOSE : An unsupported primitive is received.

*/

LOCAL void pei_not_supported (void * data)
{
  TRACE_FUNCTION ("pei_not_supported()");

  PFREE (data);
}

#endif /* GPRS */
#endif /* RR_GPRS_C */