Return to adsp_reset.c CVS log

Up to [Apple XNU] / XNU / bsd / netat

Annotation of XNU/bsd/netat/adsp_reset.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* 
        !            23:  * Reset.c
        !            24:  *
        !            25:  * From  v01.15 07/11/90 mbs
        !            26:  */
        !            27: /*
        !            28:  * Change log:
        !            29:  *   06/29/95 - Modified to handle flow control for writing (Tuyen Nguyen)
        !            30:  *    Modified for MP, 1996 by Tuyen Nguyen
        !            31:  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
        !            32:  */
        !            33: 
        !            34: #include <sys/errno.h>
        !            35: #include <sys/types.h>
        !            36: #include <sys/param.h>
        !            37: #include <machine/spl.h>
        !            38: #include <sys/systm.h>
        !            39: #include <sys/kernel.h>
        !            40: #include <sys/proc.h>
        !            41: #include <sys/filedesc.h>
        !            42: #include <sys/fcntl.h>
        !            43: #include <sys/mbuf.h>
        !            44: #include <sys/socket.h>
        !            45: #include <sys/time.h>
        !            46: 
        !            47: #include <netat/sysglue.h>
        !            48: #include <netat/appletalk.h>
        !            49: #include <netat/at_pcb.h>
        !            50: #include <netat/debug.h>
        !            51: #include <netat/adsp.h>
        !            52: #include <netat/adsp_internal.h>
        !            53: 
        !            54: /*
        !            55:  * RXFReset
        !            56:  *
        !            57:  * We just got a Forward Reset Packet.
        !            58:  *
        !            59:  * Called with interrupts OFF
        !            60:  *
        !            61:  * INPUTS:
        !            62:  *     stream pointer
        !            63:  *     Pointer to ADSP header,
        !            64:  * OUTPUTS:
        !            65:  *     Returns 1 if packet was ignored
        !            66:  */
        !            67: int RXFReset(sp, f)            /* (CCBPtr sp, ADSP_FRAMEPtr f) */
        !            68:     CCBPtr sp;
        !            69:     ADSP_FRAMEPtr f;
        !            70: {
        !            71:     unsigned int pktFirstByteSeq;
        !            72:     unsigned int hi;
        !            73:     register gbuf_t *mp;
        !            74:     register struct adspcmd *pb;
        !            75:     int s;
        !            76: 
        !            77:     ATDISABLE(s, sp->lock);
        !            78:     pktFirstByteSeq = netdw(UAL_VALUE(f->pktFirstByteSeq));
        !            79:     
        !            80:     hi = sp->recvSeq + CalcRecvWdw(sp);
        !            81: 
        !            82:     /*
        !            83:      * Must do this with interrupts OFF
        !            84:      */
        !            85:     if (BETWEEN(sp->recvSeq, pktFirstByteSeq, hi)) /* Is this acceptable? */
        !            86:     {
        !            87:        sp->recvSeq = pktFirstByteSeq;
        !            88:        while (mp = sp->rbuf_mb) { /* clear the receive queue */
        !            89:            sp->rbuf_mb = gbuf_next(mp);
        !            90:            gbuf_freem(mp);
        !            91:        }
        !            92:        if (sp->crbuf_mb) {
        !            93:            gbuf_freem(sp->crbuf_mb);
        !            94:            sp->crbuf_mb = 0;
        !            95:        }
        !            96:        sp->rData = 0;
        !            97:        sp->rbufFull = 0;
        !            98:        sp->userFlags |= eFwdReset; /* Set forward reset received Flag */
        !            99: 
        !           100:        mp = gbuf_alloc(sizeof(struct adspcmd), PRI_HI);
        !           101:        pb = (struct adspcmd *)gbuf_rptr(mp);
        !           102:        gbuf_winc(mp,sizeof(struct adspcmd));
        !           103:        pb->ioc = 0;
        !           104:        pb->mp = mp;
        !           105: 
        !           106:        pb->csCode = dspReset;
        !           107:        pb->ioResult = 0;
        !           108:        completepb(sp, pb);
        !           109:        sp->userFlags &= ~eFwdReset;
        !           110:     }
        !           111: 
        !           112:     if (LTE(pktFirstByteSeq, hi)) {
        !           113:        sp->sendCtl |= B_CTL_FRESETACK; /* Ack it if it's OK, or a duplicate */
        !           114:        sp->callSend = 1;
        !           115:     }
        !           116: 
        !           117:     ATENABLE(s, sp->lock);
        !           118:     return 0;
        !           119: }
        !           120: 
        !           121: 
        !           122: /*
        !           123:  * RXFResetAck
        !           124:  *
        !           125:  * We just got a Forward Reset Acknowledgement packet
        !           126:  *
        !           127:  * Called with interrupts OFF
        !           128:  *
        !           129:  * INPUTS:
        !           130:  *       stream pointer
        !           131:  *    Pointer to ADSP header,
        !           132:  * OUTPUTS:
        !           133:  *    Returns 1 if packet was ignored
        !           134:  */
        !           135: int RXFResetAck(sp, f)         /* (CCBPtr sp, ADSP_FRAMEPtr f) */
        !           136:     CCBPtr sp;
        !           137:     ADSP_FRAMEPtr f;
        !           138: {
        !           139:     unsigned int  PktNextRecvSeq;
        !           140:     int s;
        !           141: 
        !           142:     if (sp->frpb == 0)         /* Not expecting frwd reset Ack packet */
        !           143:        return 1;
        !           144: 
        !           145:     ATDISABLE(s, sp->lock);
        !           146:     PktNextRecvSeq = netdw(UAL_VALUE(f->pktNextRecvSeq));
        !           147: 
        !           148:     if (BETWEEN(sp->sendSeq, PktNextRecvSeq, sp->sendWdwSeq+1)) {
        !           149:        struct adspcmd *pb;
        !           150: 
        !           151:        RemoveTimerElem(&adspGlobal.fastTimers, &sp->ResetTimer); 
        !           152:                                /* Remove timer */
        !           153: 
        !           154:        /*
        !           155:         * Interrupts are OFF here while we muck with the linked list
        !           156:         */
        !           157:        pb = sp->frpb;          /* Unlink copy of user's parameter block */
        !           158:        sp->frpb = (struct adspcmd *)pb->qLink;
        !           159: 
        !           160:        pb->ioResult = 0;
        !           161:        completepb(sp, pb);     /* complete(pb, 0); */
        !           162:                
        !           163:        if (sp->state == sClosing) /* this ack may allow us to close... */
        !           164:            CheckOkToClose(sp);
        !           165:                        
        !           166:        if (sp->frpb)           /* Another to send? */
        !           167:        {
        !           168:            sp->callSend = 1;
        !           169:            sp->sendCtl |= B_CTL_FRESET;
        !           170:        }
        !           171:     }
        !           172: 
        !           173:     ATENABLE(s, sp->lock);
        !           174:     return 0;
        !           175: }
        !           176: 
        !           177: 
        !           178: /*
        !           179:  * dspReset
        !           180:  * 
        !           181:  * INPUTS:
        !           182:  *     --> ccbRefNum           refnum of connection end
        !           183:  *
        !           184:  * OUTPUTS:
        !           185:  *     none
        !           186:  *
        !           187:  * ERRORS:
        !           188:  *     errRefNum               bad connection refnum
        !           189:  *     errState                connection is not open
        !           190:  *     errAborted              request aborted by Remove or Close call
        !           191:  */
        !           192: int adspReset(sp, pb)          /* (DSPPBPtr pb) */
        !           193:     CCBPtr sp;
        !           194:     struct adspcmd *pb;
        !           195: {
        !           196:     int s;
        !           197:     register gbuf_t *mp;
        !           198:     register struct adspcmd *rpb;
        !           199:        
        !           200:     if (sp == 0) {
        !           201:        pb->ioResult = errRefNum;
        !           202:        return EINVAL;
        !           203:     }
        !           204: 
        !           205:     if (sp->state != sOpen) {
        !           206:        pb->ioResult = errState;
        !           207:        return EINVAL;
        !           208:     }
        !           209:        
        !           210:     ATDISABLE(s, sp->lock);
        !           211: 
        !           212:     while (mp = sp->sbuf_mb) { /* clear the send queue */
        !           213:        sp->sbuf_mb = gbuf_next(mp);
        !           214:        gbuf_freem(mp);
        !           215:     }
        !           216:     if (sp->csbuf_mb) {
        !           217:        gbuf_freem(sp->csbuf_mb);
        !           218:        sp->csbuf_mb = 0;
        !           219:     }
        !           220:     sp->sData = 0;
        !           221:     sp->writeFlush = 0;
        !           222:     sp->sendCtl |= B_CTL_FRESET;
        !           223: 
        !           224:     sp->firstRtmtSeq = sp->sendSeq; /* Reset sequence #'s */
        !           225:     if (mp = gbuf_copym(pb->mp)) {     /* copy the parameter block */
        !           226:            adspioc_ack(0, pb->ioc, pb->gref); /* release user */
        !           227:            rpb = (struct adspcmd *)gbuf_rptr(mp);
        !           228:            rpb->ioc = 0;               /* unlink copy */
        !           229:            rpb->mp = mp;
        !           230: 
        !           231:            qAddToEnd(&sp->frpb, rpb); 
        !           232:                                /* Hold on to pb (will be completed when */
        !           233:                                /* forward reset ack is received). */
        !           234:     } else {                   /* assume it will work... but keep no
        !           235:                                 * bookkeeping for it.  yetch! */
        !           236:            adspioc_ack(0, pb->ioc, pb->gref);
        !           237:     }
        !           238:     ATENABLE(s, sp->lock);
        !           239: 
        !           240:     CheckSend(sp);
        !           241:     return STR_IGNORE;
        !           242: 
        !           243: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.