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view src/cs/layer1/p_cfile/l1p_afun.c @ 220:0ed36de51973

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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 4e78acac3d88
children
line wrap: on
line source

/************* Revision Controle System Header *************
 *                  GSM Layer 1 software
 * L1P_AFUN.C
 *
 *        Filename l1p_afun.c
 *  Copyright 2003 (C) Texas Instruments
 *
 ************* Revision Controle System Header *************/

#define  L1P_AFUN_C

#include "l1_macro.h"
#include "l1_confg.h"

#if L1_GPRS

#if (CODE_VERSION == SIMULATION)
  #include <string.h>
  #include "l1_types.h"
  #include "sys_types.h"
  #include "l1_const.h"
  #if TESTMODE
    #include "l1tm_defty.h"
  #endif
  #if (AUDIO_TASK == 1)
    #include "l1audio_const.h"
    #include "l1audio_cust.h"
    #include "l1audio_defty.h"
  #endif  
  #if (L1_GTT == 1)
    #include "l1gtt_const.h"
    #include "l1gtt_defty.h"
  #endif
  #if (L1_MP3 == 1)
    #include "l1mp3_defty.h"
  #endif
  #if (L1_MIDI == 1)
    #include "l1midi_defty.h"
  #endif
  #include "l1_defty.h"
  #include "cust_os.h"
  #include "l1_varex.h"
  #include "l1p_cons.h"
  #include "l1p_msgt.h"
  #include "l1p_deft.h"
  #include "l1p_vare.h"

  #include "l1_msgty.h"
  #include "l1_proto.h"

#else

  #include <string.h>
  #include "l1_types.h"
  #include "sys_types.h"
  #include "l1_const.h"
  #if TESTMODE
    #include "l1tm_defty.h"
  #endif
  #if (AUDIO_TASK == 1)
    #include "l1audio_const.h"
    #include "l1audio_cust.h"
    #include "l1audio_defty.h"
  #endif  
  #if (L1_GTT == 1)
    #include "l1gtt_const.h"
    #include "l1gtt_defty.h"
  #endif
  #if (L1_MP3 == 1)
    #include "l1mp3_defty.h"
  #endif
  #if (L1_MIDI == 1)
    #include "l1midi_defty.h"
  #endif
  #include "l1_defty.h"
  #include "cust_os.h"
  #include "l1_varex.h"
  #include "l1p_cons.h"
  #include "l1p_msgt.h"
  #include "l1p_deft.h"
  #include "l1p_vare.h"

  #include "l1_msgty.h"
  #include "l1_proto.h"

#endif

// Internal prototypes
T_TRANSFER_SET    *l1pa_get_free_transfer_set (UWORD8  new_tbf);
int                l1pa_sort                  (const void *a, const void *b);
void               l1pa_reset_cr_freq_list    ();
T_CRES_LIST_PARAM *l1pa_get_free_cres_list_set();
void               l1pa_send_int_meas_report  (UWORD32               SignalCode, 
                                               T_L1P_ITMEAS_IND     *last_l1s_msg, 
                                               T_L1A_INT_MEAS_PARAM *first_meas_ptr);
void               l1pa_send_confirmation     (UWORD32 SignalCode, UWORD8 id);

/*-------------------------------------------------------*/
/* l1pa_get_free_transfer_set()                          */
/*-------------------------------------------------------*/
/*                                                       */
/* Description:                                          */
/* ------------                                          */
/*                                                       */
/* Modified parameters from globals:                     */
/* ---------------------------------                     */
/*                                                       */
/*-------------------------------------------------------*/
T_TRANSFER_SET  *l1pa_get_free_transfer_set(UWORD8  new_tbf)
{
  T_TRANSFER_SET  *transfer_set;

  #define clear_and_new(i, tbf) \
    switch(tbf) \
    { \
      case UL_TBF: \
        l1pa_l1ps_com.transfer.fset[i]->allocated_tbf = DL_TBF; \
      break; \
      \
      case DL_TBF: \
        l1pa_l1ps_com.transfer.fset[i]->allocated_tbf = UL_TBF; \
      break; \
    }
  
  // If new_tbf is to replace an existing one, we must return
  // the considered free set.
  if(new_tbf == BOTH_TBF)
  {
    if(l1pa_l1ps_com.transfer.fset[0]->allocated_tbf == NO_TBF)
      transfer_set = l1pa_l1ps_com.transfer.fset[1];
    else
      transfer_set = l1pa_l1ps_com.transfer.fset[0];
  }
  else
  if(l1pa_l1ps_com.transfer.fset[0]->allocated_tbf == new_tbf)
    transfer_set = l1pa_l1ps_com.transfer.fset[0];
  else
  if(l1pa_l1ps_com.transfer.fset[1]->allocated_tbf == new_tbf)
    transfer_set = l1pa_l1ps_com.transfer.fset[1];
  else
  if(l1pa_l1ps_com.transfer.fset[0]->allocated_tbf == BOTH_TBF)
  {
    clear_and_new(0, new_tbf);
    transfer_set = l1pa_l1ps_com.transfer.fset[1];
  }
  else
  if(l1pa_l1ps_com.transfer.fset[1]->allocated_tbf == BOTH_TBF)
  {
    clear_and_new(1, new_tbf);
    transfer_set = l1pa_l1ps_com.transfer.fset[0];
  }
  else
    if(l1pa_l1ps_com.transfer.fset[0]->allocated_tbf == NO_TBF)
      transfer_set = l1pa_l1ps_com.transfer.fset[0];
    else
      transfer_set = l1pa_l1ps_com.transfer.fset[1];

  transfer_set->SignalCode                = NULL;
  transfer_set->dl_tbf_synchro_timeslot   = 0;
  transfer_set->ul_tbf_synchro_timeslot   = 0;
  transfer_set->transfer_synchro_timeslot = 0;

  // No init of "allocated_tbf"

  transfer_set->assignment_command = NO_TBF;
  transfer_set->multislot_class    = 0;
  transfer_set->packet_ta.ta       = 255;     // Not present
  transfer_set->packet_ta.ta_index = 255;     // Not present
  transfer_set->packet_ta.ta_tn    = 255;     // Not present
  transfer_set->tsc                = 0;

  transfer_set->freq_param.chan_sel.h                          = 0;
  transfer_set->freq_param.chan_sel.rf_channel.single_rf.radio_freq = 0;
  transfer_set->freq_param.chan_sel.rf_channel.hopping_rf.maio = 0;
  transfer_set->freq_param.chan_sel.rf_channel.hopping_rf.hsn  = 0;
  transfer_set->freq_param.freq_list.rf_chan_cnt               = 0;

  transfer_set->tbf_sti.present = FALSE;

  transfer_set->dl_pwr_ctl.p0                 = 255;
  transfer_set->dl_pwr_ctl.bts_pwr_ctl_mode   = 0;
  transfer_set->dl_pwr_ctl.pr_mode            = 0;

  transfer_set->ts_override                   = 0;
  transfer_set->pc_meas_chan                  = 0;
       
  // No init of "ul_tbf_alloc" and "ul_tbf_alloc", mac_mode is enought
  
  return(transfer_set);
}

/*-------------------------------------------------------*/
/* l1pa_sort()                                           */
/*-------------------------------------------------------*/
/*                                                       */
/* Description:                                          */
/* ------------                                          */
/*                                                       */
/* Modified parameters from globals:                     */
/* ---------------------------------                     */
/*                                                       */
/*-------------------------------------------------------*/
int l1pa_sort(const void *a, const void *b)
{
  UWORD8 entry1, entry2;

  entry1 = *((UWORD8*) a);
  entry2 = *((UWORD8*) b);

  if (entry1 < entry2 )
    return(-1);
  else if (entry1 == entry2)
         return(0);
       else 
         return(1);
}

/*-------------------------------------------------------*/
/* l1pa_reset_cr_freq_list()                             */
/*-------------------------------------------------------*/
/*                                                       */
/* Description:                                          */
/* ------------                                          */
/* This function resets parameters used in Frequency     */
/* list task                                             */
/*                                                       */
/*-------------------------------------------------------*/
void l1pa_reset_cr_freq_list()
{
  UWORD8 i;
 
  for(i=0; i<NB_MEAS_MAX_GPRS; i++)       
  {
    l1pa_l1ps_com.cr_freq_list.used_il_lna   [i].il = l1_config.params.il_min; // IL used in CTRL phase for AGC setting.  
    l1pa_l1ps_com.cr_freq_list.used_il_lna_d [i].il = l1_config.params.il_min; // ... 1 frame delay.
    l1pa_l1ps_com.cr_freq_list.used_il_lna_dd[i].il = l1_config.params.il_min; // ... 2 frames delay, used in READ phase.

    l1pa_l1ps_com.cr_freq_list.used_il_lna   [i].lna = FALSE; // LNA used in CTRL phase for AGC setting.  
    l1pa_l1ps_com.cr_freq_list.used_il_lna_d [i].lna = FALSE; // ... 1 frame delay.
    l1pa_l1ps_com.cr_freq_list.used_il_lna_dd[i].lna = FALSE; // ... 2 frames delay, used in READ phase.
  }
  
  // Initialize next power measurement control.
  l1pa_l1ps_com.cr_freq_list.next_to_ctrl = 0;
  
  // Initialize next power measurement result.
  l1pa_l1ps_com.cr_freq_list.next_to_read = 0; 

  // Reset PPCH burst ctrl indication
  l1pa_l1ps_com.cr_freq_list.pnp_ctrl = 0;
          
} 

/*-------------------------------------------------------*/
/* l1pa_get_free_cres_list_set()                         */
/*-------------------------------------------------------*/
/* Parameters :                                          */
/* Return     :                                          */
/* Functionality :                                       */
/*-------------------------------------------------------*/
T_CRES_LIST_PARAM *l1pa_get_free_cres_list_set()
{
  T_CRES_LIST_PARAM *flist;
  
  // Get free set pointer.
  if(l1pa_l1ps_com.cres_freq_list.alist == &(l1pa_l1ps_com.cres_freq_list.list[0]))
    flist = &(l1pa_l1ps_com.cres_freq_list.list[1]);
  else
    flist = &(l1pa_l1ps_com.cres_freq_list.list[0]);
     
  // Clear free set.
  flist->nb_carrier = 0;
  flist->list_id    = 0;

  // Reset fifo used in AGC algo => NEED MORE INVESTIGATION.


  return(flist);
}

/*-------------------------------------------------------*/
/* l1pa_send_int_meas_report()                           */
/*-------------------------------------------------------*/
/*                                                       */
/* Description:                                          */
/* ------------                                          */
/* This function builds and sends the Interf. Meas.      */
/* report to L3                                          */
/*                                                       */
/*-------------------------------------------------------*/
void l1pa_send_int_meas_report(UWORD32               SignalCode, 
                               T_L1P_ITMEAS_IND     *last_l1s_msg, 
                               T_L1A_INT_MEAS_PARAM *first_meas_ptr)
{
  xSignalHeaderRec *msg;
  UWORD8            i,j,k;
  UWORD8            bit_mask = 0x80;

  // Allocate report msg and fill signal code.
  msg = os_alloc_sig(sizeof(T_MPHP_INT_MEAS_IND));
  DEBUGMSG(status,NU_ALLOC_ERR)         
  msg->SignalCode = SignalCode;

  // Save measurement results
  //-------------------------
  for(i = 0, j = 0, k = 0; i < 8; i++, bit_mask >>= 1)
  {
    // Fill 1st measurement report
    //----------------------------
    // If a measurement was done on timeslot i
    if(first_meas_ptr->meas_bitmap & bit_mask)
    {
      // The result is stored in the msg. 
      ((T_MPHP_INT_MEAS_IND *) (msg->SigP))->int_meas[i].rxlev[0] = first_meas_ptr->rxlev[j];

      // Next measurement value
      j++;
    }
    else
    {
      // No measurement processed on timeslot i (0x80 value)
      ((T_MPHP_INT_MEAS_IND *) (msg->SigP))->int_meas[i].rxlev[0] = (WORD8)NO_MEAS; //omaps00090550
    }
    
    // Fill 2nd measurement report
    //----------------------------
    // If a measurement was done on timeslot i
    if(last_l1s_msg->meas_bitmap & bit_mask)
    {
      // The result is stored in the msg. 
      ((T_MPHP_INT_MEAS_IND *) (msg->SigP))->int_meas[i].rxlev[1] = last_l1s_msg->rxlev[k];

      // Next measurement value
      k++;
    }
    else
    {
      // No measurement processed on timeslot i (0x80 value)
      ((T_MPHP_INT_MEAS_IND *) (msg->SigP))->int_meas[i].rxlev[1] = (WORD8)NO_MEAS;
    }
  }

  // Set ID in the report message
  ((T_MPHP_INT_MEAS_IND *) (msg->SigP))->id = first_meas_ptr->id;
                                      
  #if (TRACE_TYPE==1) || (TRACE_TYPE==4)
    l1_trace_message(msg);
  #endif
   
  os_send_sig(msg, GRRM1_QUEUE);  
  DEBUGMSG(status,NU_SEND_QUEUE_ERR)
}

/*-------------------------------------------------------*/
/* l1pa_send_confirmation()                              */
/*-------------------------------------------------------*/
/* Parameters :                                          */
/* Return     :                                          */
/* Functionality :                                       */
/*-------------------------------------------------------*/
void l1pa_send_confirmation(UWORD32 SignalCode, UWORD8 id)
{
  xSignalHeaderRec *msg_con;

  msg_con = os_alloc_sig(sizeof(T_MPHP_ASSIGNMENT_CON));
  DEBUGMSG(status,NU_ALLOC_ERR)
  msg_con->SignalCode = SignalCode;

  ((T_MPHP_ASSIGNMENT_CON *) msg_con->SigP)->assignment_id = id;
  
  #if (TRACE_TYPE==1) || (TRACE_TYPE==4)
    l1_trace_message(msg_con);
  #endif
   
  os_send_sig(msg_con, GRRM1_QUEUE);  
  DEBUGMSG(status,NU_SEND_QUEUE_ERR)
}


/*-------------------------------------------------------*/
/* l1pa_send_tbf_release_con()                           */
/*-------------------------------------------------------*/
/* Parameters :                                          */
/* Return     :                                          */
/* Functionality :                                       */
/*-------------------------------------------------------*/
void l1pa_send_tbf_release_con(UWORD32 SignalCode, UWORD8 tbf_type)
{
    xSignalHeaderRec *conf_msg;

    // Send the confirmation message with the TBF type to L3
    // Allocate confirmation message...
    conf_msg = os_alloc_sig( sizeof(T_MPHP_TBF_RELEASE_CON));
    DEBUGMSG(status,NU_ALLOC_ERR);

    //Fill the message
    conf_msg->SignalCode = SignalCode;
    ((T_MPHP_TBF_RELEASE_CON *)(conf_msg->SigP))->tbf_type = tbf_type;

    // Send the confirmation message...
    os_send_sig(conf_msg, GRRM1_QUEUE);
    DEBUGMSG(status,NU_SEND_QUEUE_ERR)
}
#endif //L1_GPRS