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view src/g23m-aci/aci/psa_sm.h @ 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 fa8dc04885d8
children
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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 :  Definitions for the protocol stack adapter 
|             GPRS session management ( SM ).
+----------------------------------------------------------------------------- 
*/ 

#ifdef GPRS

#ifndef PSA_SM_H
#define PSA_SM_H



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

/*==== TYPES ======================================================*/
typedef struct SMSetParm
{
  T_SMREG_PDP_ACTIVATE_REQ *pact;    /* primitive parameter */
  T_SMREG_PDP_ACTIVATE_REQ act;     /* primitive parameter */
} T_SM_SET_PRM;

typedef struct SMShrdParm
{
  /* state parameter */
  UBYTE             direc;          /* parameter for primitive SMREG_PDP_ACTIVATE_REQ */

  /* set parameter */
  UBYTE             owner;          /* identifies the used set */
  T_SM_SET_PRM setPrm[OWN_SRC_MAX];     /* possible sets */

  /* answer parameter */
  T_SMREG_PDP_ACTIVATE_CNF *pdp_cnf;       /* primitive parameter                  */
  T_SMREG_PDP_ACTIVATE_REJ *pdp_rej;       /* primitive parameter                  */
  T_SMREG_PDP_ACTIVATE_IND  act_ind;       /* primitive parameter                  */
  T_CAUSE_ps_cause         mod_rej_cause; /* smreg_pdp_modify_rej cause parameter */
  USHORT                    nsapi_set;     /* 1 - 15 N-SAPI - ...                  */
  T_PS_ctrl_qos             ctrl_mod_qos;  /*                                      */
  T_PS_qos                  mod_qos;       /* QOS - modify indication              */
} T_SM_SHRD_PRM;

/*==== PROTOTYPES =================================================*/

void  psaSM_Init            ( void );

#ifdef DTI
EXTERN void psaSM_smreg_configure_req(U8 rat, U8 cn_release);
EXTERN void psaSM_PDP_Deactivate        ( USHORT nsapi_set, 
                                          UBYTE  smreg_local );
EXTERN void psaSM_smreg_pdp_activate_req( U8  cid,                                          
                                          U8  hcomp,
                                          U8  dcomp);
#ifdef REL99
EXTERN void psaSM_smreg_pdp_activate_sec_req( U8  cid );
#endif /* REL99 */

EXTERN void psaSM_PDP_Modify( void );
EXTERN void psaSM_PDP_No_activate ( UBYTE smreg_ti, USHORT smreg_cause );
#endif /*DTI*/
EXTERN void psaSM_ActivateReq ( SHORT cid,
                                UBYTE hcomp,
                                ULONG dti_linkid, 
                                ULONG dti_neighbor, 
                                UBYTE dti_direction );

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

#ifdef PSA_SMF_C

GLOBAL T_SM_SHRD_PRM smShrdPrm;

#else

EXTERN T_SM_SHRD_PRM smShrdPrm;

#endif /* PSA_SMF_C */

#endif /* PSA_SM_H */

#endif  /* GPRS */
/*==== EOF =======================================================*/