FreeCalypso > hg > fc-tourmaline
view src/g23m-gprs/llc/llc_txf.c @ 19:aa868a5dcfd7
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author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 16 Oct 2020 07:38:28 +0000 |
parents | fa8dc04885d8 |
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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 : This modul is part of the entity LLC and implements all | procedures and functions as described in the | SDL-documentation (TX-statemachine) +----------------------------------------------------------------------------- */ #ifndef LLC_TXF_C #define LLC_TXF_C #endif #define ENTITY_LLC /*==== INCLUDES =============================================================*/ #include <string.h> /* to get memcpy() */ #include "typedefs.h" /* to get Condat data types */ #include "vsi.h" /* to get a lot of macros */ #include "macdef.h" #include "gprs.h" #include "gsm.h" /* to get a lot of macros */ #include "cnf_llc.h" /* to get cnf-definitions */ #include "mon_llc.h" /* to get mon-definitions */ #include "prim.h" /* to get the definitions of used SAP and directions */ #include "llc.h" /* to get the global entity definitions */ #include "llc_f.h" /* to get global functions, e.g. llc_generate_input */ #include "llc_txf.h" /* to get the global entity definitions */ #include "llc_txp.h" /* to get the function tx_cci_cipher_cnf */ #include "llc_uitxs.h" /* to get signal interface to UITX */ #include "llc_itxs.h" /* to get signal interface to ITX */ #ifndef TI_PS_OP_CIPH_DRIVER #include "cci_fbsf.h" /* to get functional interface */ #endif /*==== CONST ================================================================*/ /*==== LOCAL VARS ===========================================================*/ /*==== PRIVATE FUNCTIONS ====================================================*/ /*==== PUBLIC FUNCTIONS =====================================================*/ /* +------------------------------------------------------------------------------ | Function : tx_init +------------------------------------------------------------------------------ | Description : This procedure initialises all necessary variables of send_pdu. | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void llc_tx_init (void) { TRACE_FUNCTION( "tx_init" ); /* * Initialise TX with state NOT_READY. */ INIT_STATE (TX, TX_TLLI_UNASSIGNED_NOT_READY); /* * Flush TX queue, if there is (in case of an LLC * restart) old stuff queued. */ tx_clear_buffer(); return; } /* tx_init() */ /* +------------------------------------------------------------------------------ | Function : tx_clear_buffer +------------------------------------------------------------------------------ | Description : This procedure frees all buffered CCI_CIPHER_CNF primitives. | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void tx_clear_buffer (void) { T_TX_QUEUE *elem; T_TX_QUEUE *elem_next; TRACE_FUNCTION( "tx_clear_buffer" ); for (elem = llc_data->tx.queue; elem NEQ NULL; elem = elem_next) { elem_next = elem->next; /* * Free primitive if any is stored in queue element. */ if (elem->primitive NEQ (ULONG)NULL) { PFREE (elem->primitive); } MFREE (elem); } llc_data->tx.queue = NULL; /* * Initialise UITX space counter for each SAPI. */ llc_data->tx.queue_counter_uitx[0] = UITX_1_QUEUE_SIZE; llc_data->tx.queue_counter_uitx[1] = UITX_3_QUEUE_SIZE; llc_data->tx.queue_counter_uitx[2] = UITX_5_QUEUE_SIZE; llc_data->tx.queue_counter_uitx[3] = UITX_7_QUEUE_SIZE; llc_data->tx.queue_counter_uitx[4] = UITX_9_QUEUE_SIZE; llc_data->tx.queue_counter_uitx[5] = UITX_11_QUEUE_SIZE; /* * Initialise ITX space counter for each SAPI. */ llc_data->tx.queue_counter_itx[0] = ITX_3_QUEUE_SIZE; llc_data->tx.queue_counter_itx[1] = ITX_5_QUEUE_SIZE; llc_data->tx.queue_counter_itx[2] = ITX_9_QUEUE_SIZE; llc_data->tx.queue_counter_itx[3] = ITX_11_QUEUE_SIZE; return; } /* tx_clear_buffer() */ /* +------------------------------------------------------------------------------ | Function : tx_cipher_req +------------------------------------------------------------------------------ | Description : Handles the function tx_cipher_req. This functions sets the | ciphering parameters and calls the ciphering driver function. | | Parameters : todo | +------------------------------------------------------------------------------ */ GLOBAL void tx_cipher_req ( #ifdef LL_DESC T_CCI_CIPHER_DESC_REQ *cipher_req #else T_CCI_CIPHER_REQ *cipher_req #endif ) { T_CIPH_init_cipher_req_parms init_cipher_req_parms; T_CIPH_cipher_req_parms cipher_req_parms; T_CIPH_in_data_list in_data_list; T_CIPH_out_data out_data; T_CIPH_ck ck; U16 i; U8 status; TRACE_FUNCTION( "tx_cipher_req" ); #ifdef LLC_TRACE_CIPHERING TRACE_EVENT("UPLINK NON CIPHERED DATA"); llc_trace_desc_list3_content(cipher_req->desc_list3); #endif /* * Copy pointer to desc's from CIPHER_REQ to the in_data_list * The in_data array in allocated dynamically in this func. */ llc_copy_ul_data_to_list(cipher_req, &in_data_list); /* * Store ciphering parameters */ cipher_req_parms.gprs_parameters.pm = cipher_req->pm; cipher_req_parms.gprs_parameters.header_size = cipher_req->header_size; cipher_req_parms.gprs_parameters.ciphering_input = cipher_req->ciphering_input; cipher_req_parms.gprs_parameters.threshold = 0; init_cipher_req_parms.direction = CIPH_UPLINK_DIR; init_cipher_req_parms.algo = cipher_req->ciphering_algorithm; init_cipher_req_parms.ptr_ck = & ck; /* * Copy ciphering key */ for (i=0; i<8;i++){ init_cipher_req_parms.ptr_ck->ck_element[i] = cipher_req->kc.key[i]; } { /* Use GRLC_DATA_REQ instead of CCI_CIPHER_CNF to avoid PPASS in LLC*/ PALLOC_SDU (grlc_data_req, GRLC_DATA_REQ, (USHORT)(cipher_req->desc_list3.list_len*8 + FCS_SIZE_BITS)); grlc_data_req->sdu.o_buf = 0; grlc_data_req->sdu.l_buf = 0; out_data.buf = (U32)(&grlc_data_req->sdu.buf[grlc_data_req->sdu.o_buf]); /* * Initialize ciphering driver and cipher data */ #ifdef TI_PS_OP_CIPH_DRIVER ciph_init_cipher_req (&init_cipher_req_parms, NULL); ciph_cipher_req (&cipher_req_parms, &in_data_list, &out_data, &status); #else ciph_init_cipher_req_sim (&init_cipher_req_parms, NULL); ciph_cipher_req_sim (&cipher_req_parms, &in_data_list, &out_data, &status); #endif /* * "Send" CIPHER_CNF to LLC */ grlc_data_req->sdu.l_buf = out_data.len * 8; grlc_data_req->tlli = cipher_req->reference1; #ifdef LLC_TRACE_CIPHERING TRACE_EVENT("UPLINK CIPHERED DATA"); llc_trace_sdu(&grlc_data_req->sdu); #endif tx_cci_cipher_cnf (grlc_data_req); } /* * Remove in use mark from the cipher request primitive */ if (cipher_req != NULL) { { /* * Free cipher request, if not further used by other entities */ if (cipher_req->attached_counter == CCI_NO_ATTACHE) { #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)cipher_req->desc_list3.first); #endif /* LL_DESC */ } } MFREE (cipher_req); cipher_req = NULL; } /* * Free in_data array from in_data_list * allocated dynamically in llc_copy_ul_data_to_list() */ if(in_data_list.ptr_in_data != NULL){ MFREE(in_data_list.ptr_in_data); in_data_list.ptr_in_data = NULL; } } /* tx_cipher_req() */ /* +------------------------------------------------------------------------------ | Function : tx_send_cipher_req +------------------------------------------------------------------------------ | Description : This procedure fills all necessary parameters in the primitive | CCI_CIPHER_REQ and sends the primitive to CCI. | | Parameters : cci_cipher_req - a valid pointer to a CCI_CIPHER_REQ primitive | frame_type - indicates frame type (e.g. UI_FRAME) | protected_mode - PM bit setting for CCI_CIPHER_REQ | ns - N(U) for UI frames | cipher - indicates if frame shall be ciphered or not | oc - | +------------------------------------------------------------------------------ */ GLOBAL void tx_send_cipher_req ( #ifdef LL_DESC T_CCI_CIPHER_DESC_REQ *cci_cipher_desc_req, #else T_CCI_CIPHER_REQ *cci_cipher_desc_req, #endif T_PDU_TYPE frame_type, UBYTE protected_mode, T_FRAME_NUM ns, UBYTE cipher, ULONG oc ) { TRACE_FUNCTION( "tx_send_cipher_req" ); cci_cipher_desc_req->pm = protected_mode; if ( (cipher EQ LL_CIPHER_ON) AND (llc_data->ciphering_algorithm NEQ LLGMM_CIPHER_NO_ALGORITHM) ) { cci_cipher_desc_req->ciphering_algorithm = llc_data->ciphering_algorithm; memcpy (&cci_cipher_desc_req->kc, &llc_data->kc, sizeof(T_kc)); llc_generate_input (llc_data->current_sapi, frame_type, ns, &cci_cipher_desc_req->ciphering_input, oc); cci_cipher_desc_req->direction = CCI_DIRECTION_UPLINK; } else /* LL_CIPHER_OFF */ { cci_cipher_desc_req->ciphering_algorithm = CCI_CIPHER_NO_ALGORITHM; } tx_cipher_req (cci_cipher_desc_req); return; } /* tx_send_cipher_desc_req() */ /* +------------------------------------------------------------------------------ | Function : tx_reserve_buffer +------------------------------------------------------------------------------ | Description : This procedure allocates an element for the local transmit | queue. If cause is DEFAULT or MOBILITY_MANAGEMENT, the element | is appended at the end of the queue, otherwise it is inserted | at the beginning. Necessary data like primitive header | information and additional important data for the (resulting) | GRLC_xDATA_REQ primitive is stored in the reserved buffer | element. The primitive pointer in the element is set to NULL, | to indicate that the element is not yet 'ready to send'. | Parameter reservation_no will be set to the allocation number | of the element. Parameter buffer_available will be set to TRUE | if additional data primitives can be buffered for the current | sapi, otherwise it will be set to FALSE. | | Parameters : ll_unitdata_req - a valid pointer to a LL_UNITDATA_REQ | primitive, containing the data to be sent | prim_type - indicates GRLC_DATA/UNITDATA_REQ | cause - frame cause, only valid for GRLC_DATA_REQ | rx_service - service for flow control (if any) | reservation_no - associated number for the buffer entry | buffer_available - still buffer space available for current | SAPI | +------------------------------------------------------------------------------ */ GLOBAL void tx_reserve_buffer ( #ifdef LL_DESC T_LL_UNITDESC_REQ *ll_unitdesc_req, #else T_LL_UNITDATA_REQ *ll_unitdesc_req, #endif T_PRIM_TYPE prim_type, UBYTE cause, T_SERVICE rx_service, ULONG *reservation_no, BOOL *buffer_available ) { T_TX_QUEUE *elem; T_TX_QUEUE **insert; static ULONG allocation_number = 0; TRACE_FUNCTION ("tx_reserve_buffer"); MALLOC (elem, sizeof(T_TX_QUEUE)); /* * Increase allocation number. Use of reservation_no must correspond * to use in tx_store_buffer(). */ *reservation_no = ++(allocation_number); /* * Store all required information in new queue element. Member primitive * is set to NULL to indicate that the element is not yet ready to be sent. * Copy necessary primitive header information to ph_* variables. */ elem->primitive = (ULONG)NULL; elem->prim_type = prim_type; elem->reference = allocation_number; elem->rx_service = rx_service; elem->remove_frame = FALSE; elem->ph_sapi = ll_unitdesc_req->sapi; elem->ph_tlli = ll_unitdesc_req->tlli; elem->ph_grlc_qos_peak = ll_unitdesc_req->ll_qos.peak; elem->ph_radio_prio = ll_unitdesc_req->radio_prio; elem->ph_cause = cause; #ifdef REL99 elem->ph_pkt_flow_id = (UBYTE)ll_unitdesc_req->pkt_flow_id; #endif /* REL99 */ if ((cause EQ GRLC_DTACS_DEF) OR (cause EQ GRLC_DTACS_MOBILITY_MANAGEMENT)) { /* * "Normal" frame cause, append element at the end of queue. Let insert * either point to llc_data->tx.queue or to the member .next of an element. */ insert = &llc_data->tx.queue; while (*insert NEQ NULL) { insert = &((*insert)->next); } /* * Insert new element at found location and mark element as last in queue. */ *insert = elem; elem->next = NULL; } else /* GRLC_DTACS_PAGE_RESPONSE OR GRLC_DTACS_CELL_UPDATE */ { /* * No "normal" frame cause, thus LLGMM_TRIGGER_REQ must have been * received. Insert element at the beginning of queue. */ elem->next = llc_data->tx.queue; llc_data->tx.queue = elem; } /* * Check if a service for flow control is specified (currently only * SERVICE_UITX and SERVICE_ITX are recognized). */ *buffer_available = FALSE; if (rx_service EQ SERVICE_UITX) { /* * Decrement the space counter of UITX primitives in the queue for the * current SAPI. This means that one place of the queue is occupied. * Check if there is space for one more primitive in the queue. */ int n = llc_data->tx.queue_counter_uitx[UIMAP(llc_data->current_sapi)]; if (n > 0) { llc_data->tx.queue_counter_uitx[UIMAP(llc_data->current_sapi)]--; if (n > 1) { *buffer_available = TRUE; } } else { TRACE_EVENT ("Check uitx-queue flow"); } } else if (rx_service EQ SERVICE_ITX) { /* * Decrement the space counter of ITX primitives in the queue for the * current SAPI. This means that one place of the queue is occupied. * Check if there is space for one more primitive in the queue. */ int n = llc_data->tx.queue_counter_itx[IMAP(llc_data->current_sapi)]; if (n > 0) { llc_data->tx.queue_counter_itx[IMAP(llc_data->current_sapi)]--; if (n > 1) { *buffer_available = TRUE; } } else { TRACE_EVENT ("Check itx-queue flow"); } } else { /* * All other services (e.g. SERVICE_U) are allowed to send primitives * per default. I.E. no flow control, except for service UITX and ITX. */ *buffer_available = TRUE; } } /* tx_reserve_buffer() */ /* +------------------------------------------------------------------------------ | Function : tx_store_buffer +------------------------------------------------------------------------------ | Description : This procedure stores the given CCI primitive as GRLC primitive | in the already reserved local transmit queue element that is | given with primitive parameter reference. This queue element | is marked as 'ready to send'. The CCI primitive is being | PPASSED as GRLC_DATA_REQ/GRLC_UNITDATA_REQ, according to | prim_type in the queue element. All header information for | the GRLC primitive is being filled in from the already stored | data in the element. | | Parameters : cci_cipher_cnf - a valid pointer to a CCI_CIPHER_CNF primitive | +------------------------------------------------------------------------------ */ GLOBAL void tx_store_buffer (T_GRLC_DATA_REQ *grlc_data_req) { T_TX_QUEUE *elem = llc_data->tx.queue; TRACE_FUNCTION ("tx_store_buffer"); /* * Find corresponding queue entry. Use of reference must correspond to * use in tx_reserve_buffer(). */ while (elem NEQ NULL) { if (elem->reference EQ grlc_data_req->tlli) { break; } elem = elem->next; } if (elem NEQ NULL) { if (elem->prim_type EQ PRIM_DATA) { /* * Copy information from stored primitive header variables (ph_*) to * GRLC primitive. */ grlc_data_req->sapi = elem->ph_sapi; grlc_data_req->tlli = elem->ph_tlli; #ifdef LL_2to1 grlc_data_req->grlc_qos.peak = elem->ph_grlc_qos_peak; #else grlc_data_req->grlc_qos.peak = elem->ph_grlc_qos_peak; #endif grlc_data_req->radio_prio = elem->ph_radio_prio; grlc_data_req->cause = elem->ph_cause; #ifdef REL99 grlc_data_req->pkt_flow_id[0] = elem->ph_pkt_flow_id; #endif /* REL99*/ #ifdef _SIMULATION_ /* * Initialize all (unused) members of grlc_qos, because otherwise the test * cases fail. */ #ifdef LL_2to1 grlc_data_req->grlc_qos.delay = PS_DELAY_SUB; grlc_data_req->grlc_qos.relclass = PS_RELCLASS_SUB; grlc_data_req->grlc_qos.preced = PS_PRECED_SUB; grlc_data_req->grlc_qos.mean = PS_MEAN_SUB; #else grlc_data_req->grlc_qos.delay = GRLC_DELAY_SUB; grlc_data_req->grlc_qos.relclass = GRLC_RELCLASS_SUB; grlc_data_req->grlc_qos.preced = GRLC_PRECED_SUB; grlc_data_req->grlc_qos.mean = GRLC_MEAN_SUB; #endif #endif /* _SIMULATION_ */ elem->primitive = (ULONG)grlc_data_req; } else /* PRIM_UNITDATA */ { /* * Store CCI primitive as GRLC_UNITDATA_REQ (and mark it as stored). */ PPASS (grlc_data_req, grlc_unitdata_req, GRLC_UNITDATA_REQ); /* * Copy information from stored primitive header variables (ph_*) to * GRLC primitive (omit ph_cause, because it is not present in * GRLC_UNITDATA_REQ). */ grlc_unitdata_req->sapi = elem->ph_sapi; grlc_unitdata_req->tlli = elem->ph_tlli; #ifdef LL_2to1 grlc_unitdata_req->grlc_qos.peak = elem->ph_grlc_qos_peak; #else grlc_unitdata_req->grlc_qos.peak = elem->ph_grlc_qos_peak; #endif grlc_unitdata_req->radio_prio = elem->ph_radio_prio; #ifdef REL99 grlc_unitdata_req->pkt_flow_id[0] = elem->ph_pkt_flow_id; #endif /* REL99*/ #ifdef _SIMULATION_ /* * Initialize all (unused) members of grlc_qos, because otherwise the test * cases fail. */ #ifdef LL_2to1 grlc_unitdata_req->grlc_qos.delay = PS_DELAY_SUB; grlc_unitdata_req->grlc_qos.relclass = PS_RELCLASS_SUB; grlc_unitdata_req->grlc_qos.preced = PS_PRECED_SUB; grlc_unitdata_req->grlc_qos.mean = PS_MEAN_SUB; #else grlc_unitdata_req->grlc_qos.delay = GRLC_DELAY_SUB; grlc_unitdata_req->grlc_qos.relclass = GRLC_RELCLASS_SUB; grlc_unitdata_req->grlc_qos.preced = GRLC_PRECED_SUB; grlc_unitdata_req->grlc_qos.mean = GRLC_MEAN_SUB; #endif /* LL_2to1 */ #endif /* _SIMULATION_ */ elem->primitive = (ULONG)grlc_unitdata_req; } } else /* elem == NULL */ { /* * elem not found is possible in case of an LLC re-init, reset, * unassign, ... */ TRACE_0_INFO("No TX queue entry for given reference found"); PFREE (grlc_data_req); } } /* tx_store_buffer() */ /* +------------------------------------------------------------------------------ | Function : tx_get_next_frame +------------------------------------------------------------------------------ | Description : When LLC is not suspended, this procedure gets (and removes) | the first primitive out of the local transmit queue and stores | it in one of the parameters, according to the type of the | primitive (which is written in prim_type). If no frame is | available in the queue (i.e. first queue element is not marked | as 'ready to send', or the queue is empty), the value NO_PRIM | is written in prim_type. The parameter rx_service indicates the | originator service. In case the rx_service is UITX or ITX an | READY signal for flow control will be send after frame | transmission. | When LLC is suspended, this procedure returns the first | primitive for SAPI 1 or the first U frame for any SAPI, which | is ready to send. | | Parameters : grlc_data_req - a valid pointer to a pointer to a GRLC-DATA-REQ | primitive | grlc_unitdata_req - a valid pointer to a pointer to a | GRLC-UNITDATA-REQ primitive | prim_type - will be set to PRIM_DATA or PRIM_UNITDATA, must be | a valid pointer | rx_service - indicates the originater service | must be a valid pointer | +------------------------------------------------------------------------------ */ GLOBAL void tx_get_next_frame (T_GRLC_DATA_REQ **grlc_data_req, T_GRLC_UNITDATA_REQ **grlc_unitdata_req, T_PRIM_TYPE *prim_type, T_SERVICE *rx_service, UBYTE *sapi) { int frame_len; int ctrl_len; T_TX_QUEUE *elem; T_TX_QUEUE **find; TRACE_FUNCTION( "tx_get_next_frame" ); /* * Initialise find w/ queue start. find points always to the element * "before" the examined one, to be able to modifiy the queue, if * an element is found. */ find = &llc_data->tx.queue; /* * If LLC is suspended search the queue for the first GRLC_DATA_REQ primitive, * otherwise take the first primitive in queue (if any). */ if (llc_data->suspended EQ TRUE) { /* * LLC is in suspended mode. Search the queue for the first primitive * for SAPI 1 or the first U frame for any SAPI */ while ( (*find NEQ NULL) AND ((*find)->ph_sapi NEQ LL_SAPI_1) AND ((*find)->rx_service NEQ SERVICE_U) AND ((*find)->primitive NEQ (ULONG)NULL) ) { find = &((*find)->next); } } /* * Let elem point to queue element (NULL, if no element present/found). */ elem = *find; /* * Check if queue is empty or "first" queue element (depending on suspended * mode) is marked as not 'ready to send', i.e. it contains a NULL * primitive pointer. */ if ((elem EQ NULL) OR (elem->primitive EQ (ULONG)NULL)) { /* * Queue is empty or "first" element is not yet 'ready to send'. */ *prim_type = NO_PRIM; } else /* (elem NEQ NULL) AND (elem->primitive NEQ NULL) */ { /* * Found a valid (and 'ready to send') element in queue. */ /* * Remove found element from queue (set member next of element before * the found element to the element behind the found element and thus * skip the found element). */ *find = (*find)->next; /* * Store data of element in the given parameters. */ *prim_type = elem->prim_type; *rx_service = elem->rx_service; *sapi = elem->ph_sapi; if (elem->prim_type EQ PRIM_DATA) { *grlc_data_req = (T_GRLC_DATA_REQ *)elem->primitive; frame_len = BYTELEN((*grlc_data_req)->sdu.l_buf); } else /* PRIM_UNITDATA */ { *grlc_unitdata_req = (T_GRLC_UNITDATA_REQ *)elem->primitive; frame_len = BYTELEN((*grlc_unitdata_req)->sdu.l_buf); } /* * If the information fild doesn't fit in current N201_U, remove frame * (only applies to service U and UITX). */ if (*rx_service == SERVICE_U || *rx_service == SERVICE_UITX) { ctrl_len = (*rx_service == SERVICE_U) ? U_FRAME_MIN_OCTETS : UI_FRAME_MIN_OCTETS; if (frame_len > llc_data->n201_u_base[UIMAP(*sapi)] + ctrl_len) { elem->remove_frame = TRUE; TRACE_0_INFO("Primitive in TX exceeds N201-U: marked to remove"); } } /* * If frame is marked to remove, do it here */ if (elem->remove_frame == TRUE) { if (elem->prim_type EQ PRIM_DATA) { PFREE (*grlc_data_req); TRACE_0_INFO("GRLC_DATA_REQ removed from TX queue"); } else { PFREE (*grlc_unitdata_req); TRACE_0_INFO("GRLC_UNITDATA_REQ removed from TX queue"); } *prim_type = PRIM_REMOVED; } /* * Remove TX queue entry management element */ MFREE (elem); /* * Check if service queue space should be tracked (at the moment only * for service UITX and ITX, due to flow control to this service). */ if (*rx_service EQ SERVICE_UITX) { /* * Increment the UITX space counter for the SAPI of the primitive * to indicate that the primitive has been stored in queue. */ if (*prim_type EQ PRIM_DATA) { llc_data->tx.queue_counter_uitx[UIMAP(*sapi)]++; } else /* PRIM_UNITDATA */ { llc_data->tx.queue_counter_uitx[UIMAP(*sapi)]++; } } else if (*rx_service EQ SERVICE_ITX) { /* * Increment the ITX space counter for the SAPI of the primitive * to indicate that the primitive has been stored in queue. */ llc_data->tx.queue_counter_itx[IMAP(*sapi)]++; } } return; } /* tx_get_next_frame() */ /* +------------------------------------------------------------------------------ | Function : tx_get_first_data_frame +------------------------------------------------------------------------------ | Description : This procedure finds the first GRLC_DATA_REQ primitive in the | local transmit queue and stores its queue element in the | parameter element, if any. The primitive (element) stays in | the queue. If no GRLC_DATA_REQ primitive is found in the queue, | no element is stored in element, but the value NULL. | | Parameters : elem - must be a valid pointer to a pointer to a | TX queue element | +------------------------------------------------------------------------------ */ GLOBAL void tx_get_first_data_frame (T_TX_QUEUE **elem) { TRACE_FUNCTION( "tx_get_first_data_frame" ); /* * Check the local transmit queue until a GRLC_DATA_REQ is found or the end * of the queue has been reached. In the latter case, *elem is automatically * set to NULL. */ for (*elem = llc_data->tx.queue; *elem NEQ NULL; *elem = (*elem)->next) { /* * Check if primitive is a GRLC_DATA_REQ primitive. */ if ((*elem)->prim_type EQ PRIM_DATA) { break; } } return; } /* tx_get_first_data_frame() */ /* +------------------------------------------------------------------------------ | Function : tx_remove_data_frames +------------------------------------------------------------------------------ | Description : This procedure removes all PRIM_DATA for given SAPI and service | from TX queue. If an element is removed and | | Parameters : service - service which requests to delete its primitives | sapi - the sapi of the primitives to delete | +------------------------------------------------------------------------------ */ GLOBAL void tx_remove_data_frames (T_SERVICE service, T_SAPI sapi) { T_TX_QUEUE *elem; T_TX_QUEUE **find = &llc_data->tx.queue; BOOL elem_removed = FALSE; TRACE_FUNCTION( "tx_remove_data_frames" ); while (*find NEQ NULL) { /* * Let elem point to queue element */ elem = *find; /* * Check if primitive is a GRLC_DATA_REQ primitive and * check the sapi of the queue element */ if ((elem->prim_type EQ PRIM_DATA) AND (elem->ph_sapi EQ sapi) AND (elem->rx_service EQ service) ) { elem_removed = TRUE; /* * Remove found element from queue (set member next of element before * the found element to the element behind the found element and thus * skip the found element). */ *find = (*find)->next; /* * Check if we have a valid pointer to a primitive */ if ((elem->primitive NEQ (ULONG)NULL)) { PFREE ((T_GRLC_DATA_REQ *)elem->primitive); TRACE_0_INFO("TX queue element and primitive removed"); } else { /* * Primitive is in use at CCI. * It is no problem if the corresponding primitive to this entry * returns from CCI, because the reference number will not be found * and the primitive data will then be freed. */ TRACE_0_INFO("In use TX queue element removed"); } /* * Remove TX queue entry management element. */ MFREE (elem); /* * Check if service queue space should be tracked (at the moment only * for service UITX and ITX, due to flow control to this service). * In this case increment the space counter for the SAPI of the * primitive to indicate that the primitive has been stored in queue. */ if (service EQ SERVICE_UITX) { llc_data->tx.queue_counter_uitx[UIMAP(sapi)]++; } else if (service EQ SERVICE_ITX) { llc_data->tx.queue_counter_itx[IMAP(sapi)]++; } } else { /* * Point to the next queue element pointer */ find = &((*find)->next); } } /* * Now check, if a ready indication must be send must be send to the * requesting service (if at least one elem was removed, send one). * Currently only service UITX and ITX are requesting a signal. */ if (elem_removed) { SWITCH_LLC (sapi); if (service EQ SERVICE_UITX) { sig_tx_uitx_ready_ind(); } else if (service EQ SERVICE_ITX) { sig_tx_itx_ready_ind(); } } return; } /* tx_remove_data_frames() */