patch-2.3.47 linux/drivers/net/skfp/ess.c

• Lines: 733
• Date: Fri Feb 18 14:55:53 2000
• Orig file: v2.3.46/linux/drivers/net/skfp/ess.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.46/linux/drivers/net/skfp/ess.c linux/drivers/net/skfp/ess.c
@@ -0,0 +1,732 @@
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skfddi.c" for further information.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	The information in this file is provided "AS IS" without warranty.
+ *
+ ******************************************************************************/
+
+/*
+ * *******************************************************************
+ * This SBA code implements the Synchronous Bandwidth Allocation
+ * functions described in the "FDDI Synchronous Forum Implementer's
+ * Agreement" dated December 1th, 1993.
+ * *******************************************************************
+ *
+ *	PURPOSE: The purpose of this function is to control
+ *		 synchronous allocations on a single FDDI segment.
+ *		 Allocations are limited to the primary FDDI ring.
+ *		 The SBM provides recovery mechanisms to recover
+ *		 unused bandwidth also resolves T_Neg and
+ *		 reconfiguration changes. Many of the SBM state
+ *		 machine inputs are sourced by the underlying
+ *		 FDDI sub-system supporting the SBA application.
+ *
+ * *******************************************************************
+ */
+
+#include "h/types.h"
+#include "h/fddi.h"
+#include "h/smc.h"
+#include "h/smt_p.h"
+
+
+#ifndef	SLIM_SMT
+
+#ifdef ESS
+
+#ifndef lint
+static const char ID_sccs[] = "@(#)ess.c	1.10 96/02/23 (C) SK" ;
+#define LINT_USE(x)
+#else
+#define LINT_USE(x)	(x)=(x)
+#endif
+#define MS2BCLK(x)	((x)*12500L)
+
+/*
+	-------------------------------------------------------------
+	LOCAL VARIABLES:
+	-------------------------------------------------------------
+*/
+
+static const u_short plist_raf_alc_res[] = { SMT_P0012, SMT_P320B, SMT_P320F,
+					SMT_P3210, SMT_P0019, SMT_P001A,
+					SMT_P001D, 0 } ;
+
+static const u_short plist_raf_chg_req[] = { SMT_P320B, SMT_P320F, SMT_P3210,
+					SMT_P001A, 0 } ;
+
+static const struct fddi_addr smt_sba_da = {0x80,0x01,0x43,0x00,0x80,0x0C} ;
+static const struct fddi_addr null_addr = {0,0,0,0,0,0} ;
+
+/*
+	-------------------------------------------------------------
+	GLOBAL VARIABLES:
+	-------------------------------------------------------------
+*/
+
+
+/*
+	-------------------------------------------------------------
+	LOCAL FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+static	void	ess_send_response(),		ess_config_fifo(),
+		ess_send_alc_req(),		ess_send_frame() ;
+
+/*
+	-------------------------------------------------------------
+	EXTERNAL FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+extern	void	*sm_to_para() ;
+
+extern	void	smt_send_frame(),	smt_free_mbuf(),
+		set_formac_tsync(),	formac_reinit_tx() ;
+
+extern	int	smt_check_para() ;
+
+extern	SMbuf	*smt_get_mbuf(),	*smt_build_frame() ;
+
+extern	u_long	smt_get_tid() ;
+
+/*
+	-------------------------------------------------------------
+	PUBLIC FUNCTIONS:
+	-------------------------------------------------------------
+*/
+
+	void	ess_timer_poll(),		ess_para_change() ;
+
+	int	ess_raf_received_pack(),	process_bw_alloc() ;
+
+
+/*
+ * --------------------------------------------------------------------------
+ *	End Station Support	(ESS)
+ * --------------------------------------------------------------------------
+ */
+
+/*
+ * evaluate the RAF frame
+ */
+int ess_raf_received_pack(smc,mb,sm,fs)
+struct s_smc *smc ;
+SMbuf *mb ;
+struct smt_header *sm ;
+int fs ;
+{
+	void			*p ;		/* universal pointer */
+	struct smt_p_0016	*cmd ;		/* para: command for the ESS */
+	SMbuf			*db ;
+	u_long			msg_res_type ;	/* recource type */
+	u_long			payload, overhead ;
+	int			local ;
+	int			i ;
+
+	/*
+	 * Message Processing Code
+	 */
+	 local = ((fs & L_INDICATOR) != 0) ;
+
+	/*
+	 * get the resource type
+	 */
+	if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) {
+		DB_ESS("ESS: RAF frame error, parameter type not found\n",0,0) ;
+		return(fs) ;
+	}
+	msg_res_type = ((struct smt_p_0015 *)p)->res_type ;
+
+	/*
+	 * get the pointer to the ESS command
+	 */
+	if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) {
+		/*
+		 * error in frame: para ESS command was not found
+		 */
+		 DB_ESS("ESS: RAF frame error, parameter command not found\n",0,0);
+		 return(fs) ;
+	}
+
+	DB_ESSN(2,"fc %x	ft %x\n",sm->smt_class,sm->smt_type) ;
+	DB_ESSN(2,"ver %x	tran %lx\n",sm->smt_version,sm->smt_tid) ;
+	DB_ESSN(2,"stn_id %s\n",addr_to_string(&sm->smt_source),0) ;
+
+	DB_ESSN(2,"infolen %x	res %x\n",sm->smt_len, msg_res_type) ;
+	DB_ESSN(2,"sbacmd %x\n",cmd->sba_cmd,0) ;
+
+	/*
+	 * evaluate the ESS command
+	 */
+	switch (cmd->sba_cmd) {
+
+	/*
+	 * Process an ESS Allocation Request
+	 */
+	case REQUEST_ALLOCATION :
+		/*
+		 * check for an RAF Request (Allocation Request)
+		 */
+		if (sm->smt_type == SMT_REQUEST) {
+			/*
+			 * process the Allocation request only if the frame is
+			 * local and no static allocation is used
+			 */
+			if (!local || smc->mib.fddiESSPayload)
+				return(fs) ;
+			
+			p = (void *) sm_to_para(smc,sm,SMT_P0019)  ;
+			for (i = 0; i < 5; i++) {
+				if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) {
+					return(fs) ;
+				}
+			}
+
+			/*
+			 * Note: The Application should send a LAN_LOC_FRAME.
+			 *	 The ESS do not send the Frame to the network!
+			 */
+			smc->ess.alloc_trans_id = sm->smt_tid ;
+			DB_ESS("ESS: save Alloc Req Trans ID %lx\n",sm->smt_tid,0);
+			p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
+			((struct smt_p_320f *)p)->mib_payload =
+				smc->mib.a[PATH0].fddiPATHSbaPayload ;
+			p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
+			((struct smt_p_3210 *)p)->mib_overhead =
+				smc->mib.a[PATH0].fddiPATHSbaOverhead ;
+			sm->smt_dest = smt_sba_da ;
+
+			if (smc->ess.local_sba_active)
+				return(fs | I_INDICATOR) ;
+
+			if (!(db = smt_get_mbuf(smc)))
+				return(fs) ;
+
+			db->sm_len = mb->sm_len ;
+			db->sm_off = mb->sm_off ;
+			memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm,
+				(int)db->sm_len) ;
+			dump_smt(smc,
+				(struct smt_header *)(db->sm_data+db->sm_off),
+				"RAF") ;
+			smt_send_frame(smc,db,FC_SMT_INFO,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * The RAF frame is an Allocation Response !
+		 * check the parameters
+		 */
+		if (smt_check_para(smc,sm,plist_raf_alc_res)) {
+			DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * VERIFY THE FRAME IS WELL BUILT:
+		 *
+		 *	1. path index = primary ring only
+		 *	2. resource type = sync bw only
+		 *	3. trans action id = alloc_trans_id
+		 *	4. reason code = success
+		 *
+		 * If any are violated, discard the RAF frame
+		 */
+		if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
+			!= PRIMARY_RING) ||
+			(msg_res_type != SYNC_BW) ||
+		(((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason
+			!= SMT_RDF_SUCCESS) ||
+			(sm->smt_tid != smc->ess.alloc_trans_id)) {
+
+			DB_ESS("ESS: Allocation Responce not accepted\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * Extract message parameters
+		 */
+		p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
+		payload = ((struct smt_p_320f *)p)->mib_payload ;
+		p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
+		overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
+
+		DB_ESSN(2,"payload= %lx	overhead= %lx\n",payload,overhead) ;
+
+		/*
+		 * process the bandwidth allocation
+		 */
+		(void)process_bw_alloc(smc,(long)payload,(long)overhead) ;
+
+		return(fs) ;
+		/* end of Process Allocation Request */
+
+	/*
+	 * Process an ESS Change Request
+	 */
+	case CHANGE_ALLOCATION :
+		/*
+		 * except only replies
+		 */
+		if (sm->smt_type != SMT_REQUEST) {
+			DB_ESS("ESS: Do not process Change Responses\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * check the para for the Change Request
+		 */
+		if (smt_check_para(smc,sm,plist_raf_chg_req)) {
+			DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * Verify the path index and resource
+		 * type are correct. If any of
+		 * these are false, don't process this
+		 * change request frame.
+		 */
+		if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index
+			!= PRIMARY_RING) || (msg_res_type != SYNC_BW)) {
+			DB_ESS("ESS: RAF frame with para problem, ignoring\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * Extract message queue parameters
+		 */
+		p = (void *) sm_to_para(smc,sm,SMT_P320F) ;
+		payload = ((struct smt_p_320f *)p)->mib_payload ;
+		p = (void *) sm_to_para(smc,sm,SMT_P3210) ;
+		overhead = ((struct smt_p_3210 *)p)->mib_overhead ;
+
+		DB_ESSN(2,"ESS: Change Request from %s\n",
+			addr_to_string(&sm->smt_source),0) ;
+		DB_ESSN(2,"payload= %lx	overhead= %lx\n",payload,overhead) ;
+
+		/*
+		 * process the bandwidth allocation
+		 */
+		if(!process_bw_alloc(smc,(long)payload,(long)overhead))
+			return(fs) ;
+
+		/*
+		 * send an RAF Change Reply
+		 */
+		ess_send_response(smc,sm,CHANGE_ALLOCATION) ;
+
+		return(fs) ;
+		/* end of Process Change Request */
+
+	/*
+	 * Process Report Response
+	 */
+	case REPORT_ALLOCATION :
+		/*
+		 * except only requests
+		 */
+		if (sm->smt_type != SMT_REQUEST) {
+			DB_ESS("ESS: Do not process a Report Reply\n",0,0) ;
+			return(fs) ;
+		}
+
+		DB_ESSN(2,"ESS: Report Request from %s\n",
+			addr_to_string(&(sm->smt_source)),0) ;
+
+		/*
+		 * verify that the resource type is sync bw only
+		 */
+		if (msg_res_type != SYNC_BW) {
+			DB_ESS("ESS: ignoring RAF with para problem\n",0,0) ;
+			return(fs) ;
+		}
+
+		/*
+		 * send an RAF Change Reply
+		 */
+		ess_send_response(smc,sm,REPORT_ALLOCATION) ;
+
+		return(fs) ;
+		/* end of Process Report Request */
+
+	default:
+		/*
+		 * error in frame
+		 */
+		DB_ESS("ESS: ignoring RAF with bad sba_cmd\n",0,0) ;
+		break ;
+	}
+
+	return(fs) ;
+}
+
+/*
+ * determines the synchronous bandwidth, set the TSYNC register and the
+ * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG.
+ */
+int process_bw_alloc(smc,payload,overhead)
+struct s_smc *smc ;
+long payload ;
+long overhead ;
+{
+	/*
+	 * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG,
+	 * if the payload is greater than zero.
+	 * For the SBAPayload and the SBAOverhead we have the following
+	 * unite quations
+ 	 *		      _		  _
+	 *		     |	     bytes |
+	 *	SBAPayload = | 8000 ------ |
+	 *		     |		s  |
+	 *		      -		  -
+ 	 *		       _       _
+	 *		      |	 bytes	|
+	 *	SBAOverhead = | ------	|
+	 *		      |	 T-NEG	|
+	 *		       -       -
+ 	 *
+	 * T-NEG is discribed by the equation:
+	 *
+	 *		     (-) fddiMACT-NEG
+	 *	T-NEG =	    -------------------
+	 *			12500000 1/s
+	 *
+	 * The number of bytes we are able to send is the payload
+	 * plus the overhead.
+	 *
+	 *			  bytes    T-NEG SBAPayload 8000 bytes/s
+	 * sync_bw =  SBAOverhead ------ + -----------------------------
+	 *	   		  T-NEG		T-NEG
+	 *
+	 *
+	 *	      		     1
+	 * sync_bw =  SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload
+	 *	       		    1562
+	 *
+	 */
+
+	/*
+	 * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload
+	 */
+/*	if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) {
+		DB_ESS("ESS: SMT does not accept the payload value\n",0,0) ;
+		return(FALSE) ;
+	}
+	if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) {
+		DB_ESS("ESS: SMT does not accept the overhead value\n",0,0) ;
+		return(FALSE) ;
+	} */
+
+	/* premliminary */
+	if (payload > MAX_PAYLOAD || overhead > 5000) {
+		DB_ESS("ESS: payload / overhead not accepted\n",0,0) ;
+		return(FALSE) ;
+	}
+
+	/*
+	 * start the iterative allocation process if the payload or the overhead
+	 * are smaller than the parsed values
+	 */
+	if (smc->mib.fddiESSPayload &&
+		((u_long)payload != smc->mib.fddiESSPayload ||
+		(u_long)overhead != smc->mib.fddiESSOverhead)) {
+		smc->ess.raf_act_timer_poll = TRUE ;
+		smc->ess.timer_count = 0 ;
+	}
+
+	/*
+	 * evulate the Payload
+	 */
+	if (payload) {
+		DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit on\n",0,0) ;
+		smc->ess.sync_bw_available = TRUE ;
+
+		smc->ess.sync_bw = overhead -
+			(long)smc->mib.m[MAC0].fddiMACT_Neg *
+			payload / 1562 ;
+	}
+	else {
+		DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit off\n",0,0) ;
+		smc->ess.sync_bw_available = FALSE ;
+		smc->ess.sync_bw = 0 ;
+		overhead = 0 ;
+	}
+
+	smc->mib.a[PATH0].fddiPATHSbaPayload = payload ;
+	smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ;
+
+
+	DB_ESSN(2,"tsync = %lx\n",smc->ess.sync_bw,0) ;
+
+	ess_config_fifo(smc) ;
+	set_formac_tsync(smc,smc->ess.sync_bw) ;
+	return(TRUE) ;
+}
+
+static void ess_send_response(smc,sm,sba_cmd)
+struct s_smc *smc ;
+struct smt_header *sm ;
+int sba_cmd ;
+{
+	struct smt_sba_chg	*chg ;
+	SMbuf			*mb ;
+	void			*p ;
+
+	/*
+	 * get and initialize the responce frame
+	 */
+	if (sba_cmd == CHANGE_ALLOCATION) {
+		if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
+				sizeof(struct smt_sba_chg))))
+				return ;
+	}
+	else {
+		if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY,
+				sizeof(struct smt_sba_rep_res))))
+				return ;
+	}
+
+	chg = smtod(mb,struct smt_sba_chg *) ;
+	chg->smt.smt_tid = sm->smt_tid ;
+	chg->smt.smt_dest = sm->smt_source ;
+
+	/* set P15 */
+	chg->s_type.para.p_type = SMT_P0015 ;
+	chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
+	chg->s_type.res_type = SYNC_BW ;
+
+	/* set P16 */
+	chg->cmd.para.p_type = SMT_P0016 ;
+	chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
+	chg->cmd.sba_cmd = sba_cmd ;
+
+	/* set P320B */
+	chg->path.para.p_type = SMT_P320B ;
+	chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
+	chg->path.mib_index = SBAPATHINDEX ;
+	chg->path.path_pad = (u_short)NULL ;
+	chg->path.path_index = PRIMARY_RING ;
+
+	/* set P320F */
+	chg->payload.para.p_type = SMT_P320F ;
+	chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
+	chg->payload.mib_index = SBAPATHINDEX ;
+	chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
+
+	/* set P3210 */
+	chg->overhead.para.p_type = SMT_P3210 ;
+	chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
+	chg->overhead.mib_index = SBAPATHINDEX ;
+	chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
+
+	if (sba_cmd == CHANGE_ALLOCATION) {
+		/* set P1A */
+		chg->cat.para.p_type = SMT_P001A ;
+		chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
+		p = (void *) sm_to_para(smc,sm,SMT_P001A) ;
+		chg->cat.category = ((struct smt_p_001a *)p)->category ;
+	}
+	dump_smt(smc,(struct smt_header *)chg,"RAF") ;
+	ess_send_frame(smc,mb) ;
+}
+
+
+void ess_timer_poll(smc)
+struct s_smc *smc ;
+{
+	if (!smc->ess.raf_act_timer_poll)
+		return ;
+
+	DB_ESSN(2,"ESS: timer_poll\n",0,0) ;
+
+	smc->ess.timer_count++ ;
+	if (smc->ess.timer_count == 10) {
+		smc->ess.timer_count = 0 ;
+		ess_send_alc_req(smc) ;
+	}
+}
+
+static void ess_send_alc_req(smc)
+struct s_smc *smc ;
+{
+	struct smt_sba_alc_req *req ;
+	SMbuf	*mb ;
+
+	/*
+	 * send never allocation request where the requested payload and
+	 * overhead is zero or deallocate bandwidht when no bandwidth is
+	 * parsed
+	 */
+	if (!smc->mib.fddiESSPayload) {
+		smc->mib.fddiESSOverhead = 0 ;
+	}
+	else {
+		if (!smc->mib.fddiESSOverhead)
+			smc->mib.fddiESSOverhead = DEFAULT_OV ;
+	}
+
+	if (smc->mib.fddiESSOverhead ==
+		smc->mib.a[PATH0].fddiPATHSbaOverhead &&
+		smc->mib.fddiESSPayload ==
+		smc->mib.a[PATH0].fddiPATHSbaPayload){
+		smc->ess.raf_act_timer_poll = FALSE ;
+		smc->ess.timer_count = 7 ;	/* next RAF alc req after 3 s */
+		return ;
+	}
+	
+	/*
+	 * get and initialize the responce frame
+	 */
+	if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST,
+			sizeof(struct smt_sba_alc_req))))
+			return ;
+	req = smtod(mb,struct smt_sba_alc_req *) ;
+	req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ;
+	req->smt.smt_dest = smt_sba_da ;
+
+	/* set P15 */
+	req->s_type.para.p_type = SMT_P0015 ;
+	req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ;
+	req->s_type.res_type = SYNC_BW ;
+
+	/* set P16 */
+	req->cmd.para.p_type = SMT_P0016 ;
+	req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ;
+	req->cmd.sba_cmd = REQUEST_ALLOCATION ;
+
+	/*
+	 * set the parameter type and parameter lenght of all used
+	 * parameters
+	 */
+
+	/* set P320B */
+	req->path.para.p_type = SMT_P320B ;
+	req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ;
+	req->path.mib_index = SBAPATHINDEX ;
+	req->path.path_pad = (u_short)NULL ;
+	req->path.path_index = PRIMARY_RING ;
+
+	/* set P0017 */
+	req->pl_req.para.p_type = SMT_P0017 ;
+	req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ;
+	req->pl_req.sba_pl_req = smc->mib.fddiESSPayload -
+		smc->mib.a[PATH0].fddiPATHSbaPayload ;
+
+	/* set P0018 */
+	req->ov_req.para.p_type = SMT_P0018 ;
+	req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ;
+	req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead -
+		smc->mib.a[PATH0].fddiPATHSbaOverhead ;
+
+	/* set P320F */
+	req->payload.para.p_type = SMT_P320F ;
+	req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ;
+	req->payload.mib_index = SBAPATHINDEX ;
+	req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ;
+
+	/* set P3210 */
+	req->overhead.para.p_type = SMT_P3210 ;
+	req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ;
+	req->overhead.mib_index = SBAPATHINDEX ;
+	req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ;
+
+	/* set P19 */
+	req->a_addr.para.p_type = SMT_P0019 ;
+	req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ;
+	req->a_addr.sba_pad = (u_short)NULL ;
+	req->a_addr.alloc_addr = null_addr ;
+
+	/* set P1A */
+	req->cat.para.p_type = SMT_P001A ;
+	req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ;
+	req->cat.category = smc->mib.fddiESSCategory ;
+
+	/* set P1B */
+	req->tneg.para.p_type = SMT_P001B ;
+	req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ;
+	req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ;
+
+	/* set P1C */
+	req->segm.para.p_type = SMT_P001C ;
+	req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ;
+	req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ;
+
+	dump_smt(smc,(struct smt_header *)req,"RAF") ;
+	ess_send_frame(smc,mb) ;
+}
+
+static void ess_send_frame(smc,mb)
+struct s_smc *smc ;
+SMbuf *mb ;
+{
+	/*
+	 * check if the frame must be send to the own ESS
+	 */
+	if (smc->ess.local_sba_active) {
+		/*
+		 * Send the Change Reply to the local SBA
+		 */
+		DB_ESS("ESS:Send to the local SBA\n",0,0) ;
+		if (!smc->ess.sba_reply_pend)
+			smc->ess.sba_reply_pend = mb ;
+		else {
+			DB_ESS("Frame is lost - another frame was pending\n",0,0);
+			smt_free_mbuf(smc,mb) ;
+		}
+	}
+	else {
+		/*
+		 * Send the SBA RAF Change Reply to the network
+		 */
+		DB_ESS("ESS:Send to the network\n",0,0) ;
+		smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
+	}
+}
+
+void ess_para_change(smc)
+struct s_smc *smc ;
+{
+	(void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload,
+		(long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ;
+}
+
+static void ess_config_fifo(smc)
+struct s_smc *smc ;
+{
+	/*
+	 * if nothing to do exit 
+	 */
+	if (smc->mib.a[PATH0].fddiPATHSbaPayload) {
+		if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON &&
+			(smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) ==
+			smc->mib.fddiESSSynchTxMode) {
+			return ;
+		}
+	}
+	else {
+		if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) {
+			return ;
+		}
+	}
+
+	/*
+	 * split up the FIFO and reinitialize the queues
+	 */
+	formac_reinit_tx(smc) ;
+}
+
+#endif /* ESS */
+
+#endif	/* no SLIM_SMT */