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view src/g23m-gprs/sm/sm_memory_handler.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
line wrap: on
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/*----------------------------------------------------------------------------
|  Project :  3G PS
|  Module  :  SM
+-----------------------------------------------------------------------------
|             Copyright 2003 Texas Instruments.
|             All rights reserved. 
| 
|             This file is confidential and a trade secret of Texas 
|             Instruments .
|             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. 
+-----------------------------------------------------------------------------
| Purpose:    Memory allocation function definition for the SM Entity.
|             For design details, see:
|             8010.908 SM Detailed Specification
+---------------------------------------------------------------------------*/

/*==== DECLARATION CONTROL =================================================*/

#ifndef SM_MEMORY_HANDLER_H
#define SM_MEMORY_HANDLER_H

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

/*==== CONSTS ===============================================================*/

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

/*==== EXPORTS ==============================================================*/

/* Memory allocation/free functions */
void sm_pfree(/*@only@*/ /*@out@*/ /*@null@*/void *data);

/*************************************************************/
/* Functions for managing context data structures and arrays */
/*************************************************************/

/*@only@*/ /*@null@*/
struct T_SM_CONTEXT_DATA *
        sm_allocate_context_data(void);

void    sm_assign_context_data_to_nsapi (/*@only@*/
					 struct T_SM_CONTEXT_DATA *context,
					 int /*@alt U8@*/ nsapi);

/*@observer@*/
struct T_SM_CONTEXT_DATA *
        sm_get_context_data_from_nsapi  (int /*@alt U8@*/ nsapi);

/*@observer@*/ /*@null@*/
struct T_SM_CONTEXT_DATA *
        sm_get_context_data_from_ti     (int /*@alt U8@*/ ti);

void    sm_free_context_data            (/*@only@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_free_context_data_by_nsapi   (int /*@alt U8@*/ nsapi);

/*@observer@*/ /*@null@*/
struct T_SM_CONTEXT_DATA *
        sm_insert_mt_context_data       (int /*@alt U8@*/ ti);

/*@null@*/ /*@only@*/
struct T_SM_CONTEXT_DATA *
        sm_extract_mt_context_data      (int /*@alt U8@*/ ti);

void    sm_free_pending_mt_context_by_index(U16 index);

U16     sm_linked_nsapis                (U8 ti);

void    sm_allocate_and_copy_coded_msg  (struct T_SM_CONTEXT_DATA *context,
					 U8                        est_cause,
					 /*@in@*/ T_sdu           *msg);

void    sm_free_coded_msg               (struct T_SM_CONTEXT_DATA *context);

/***********************************************************************/
/*  Network Control Managed Memory Handler Functions                   */
/***********************************************************************/

void    sm_nw_allocate_and_copy_requested_pco(/*@special@*/
					 struct T_SM_CONTEXT_DATA *context,
					 size_t /*@alt U8,U16@*/   pco_len,
					 /*@unique@*/ U8          *pco);

void    sm_nw_allocate_and_copy_negotiated_pco(/*@special@*/
					 struct T_SM_CONTEXT_DATA *context,
					 size_t /*@alt U8@*/       pco_len,
					 /*@unique@*/ U8          *pco);

void    sm_nw_free_requested_pco        (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_nw_free_negotiated_pco       (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_nw_allocate_and_copy_apn     (/*@special@*/
					 struct T_SM_CONTEXT_DATA  *context,
					 U8 c_apn, /*@unique@*/ U8 *apn);

void    sm_nw_free_apn                  (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

BOOL    sm_nw_is_address_and_apn_equal  (struct T_SM_CONTEXT_DATA *context,
                                         /*@observer@*/T_NAS_ip   *context_address,
				         /*@observer@*/T_M_SM_address *msg_address,
                                         U8 v_apn, T_M_SM_apn *apn);

void    sm_nw_allocate_and_copy_requested_tft(/*@special@*/
					 struct T_SM_CONTEXT_DATA *context,
					 /*@in@*/ T_NAS_tft       *tft);

void    sm_nw_allocate_active_tft       (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_nw_free_requested_tft        (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_nw_free_active_tft           (/*@special@*/
					 struct T_SM_CONTEXT_DATA *context);

void    sm_nw_store_requested_address   (struct T_SM_CONTEXT_DATA *context,
					 U8 pdp_type,
					 T_NAS_ctrl_ip_address ctrl_ip_address,
					 T_NAS_ip_address *ip_address);

void    sm_nw_store_negotiated_address  (struct T_SM_CONTEXT_DATA *context,
					 T_M_SM_address           *address,
					 U8                        v_address);

void    sm_nw_copy_negotiated_address_to_requested(struct T_SM_CONTEXT_DATA *);

BOOL    sm_is_address_changed_with_reactivation(struct T_SM_CONTEXT_DATA *context,
                                                   T_M_SM_address       *address,
                                                   U8                 v_address);
#endif /* SM_MEMORY_HANDLER_H */

/*==== END OF FILE ==========================================================*/