Various:
* Make synchronous negotiation work. * Use the bitbucket when the target requests too much data. * Loop in aicintr() until we get to a state where we have to wait.
This commit is contained in:
mycroft
parent
94da0b5da5
commit
8abb91e18d
@ -1,4 +1,4 @@
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/* $NetBSD: aic6360.c,v 1.28 1995/02/01 16:56:42 mycroft Exp $ */
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/* $NetBSD: aic6360.c,v 1.29 1995/02/01 21:49:37 mycroft Exp $ */
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/*
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* Copyright (c) 1994, 1995 Charles Hannum. All rights reserved.
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@ -70,8 +70,8 @@
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#define AIC_USE_DWORDS 0
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/* Synchronous data transfers? */
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#define AIC_USE_SYNCHRONOUS 0
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#define AIC_SYNC_REQ_ACK_OFS 15
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#define AIC_USE_SYNCHRONOUS 1
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#define AIC_SYNC_REQ_ACK_OFS 8
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/* Wide data transfers? */
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#define AIC_USE_WIDE 0
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@ -524,7 +524,8 @@ struct aic_softc {
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/* Message stuff */
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u_char sc_msgpriq; /* Messages we want to send */
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u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */
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u_char sc_msgout; /* Message last transmitted */
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u_char sc_lastmsg; /* Message last transmitted */
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u_char sc_currmsg; /* Message currently ready to transmit */
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#define SEND_DEV_RESET 0x01
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#define SEND_PARITY_ERROR 0x02
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#define SEND_ABORT 0x04
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@ -1464,16 +1465,17 @@ nextbyte:
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case MSG_PARITY_ERROR:
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/* Resend the last message. */
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aic_sched_msgout(sc->sc_msgout);
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aic_sched_msgout(sc->sc_lastmsg);
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break;
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case MSG_MESSAGE_REJECT:
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AIC_MISC(("message rejected "));
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switch (sc->sc_msgout) {
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AIC_MISC(("message rejected %02x ", sc->sc_lastmsg));
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switch (sc->sc_lastmsg) {
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#if AIC_USE_SYNCHRONOUS + AIC_USE_WIDE
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case SEND_IDENTIFY:
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ti->flags &= ~(DO_SYNC|DO_WIDE);
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ti->period = ti->offset = 0;
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aic_setsync(sc, ti);
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ti->width = 0;
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break;
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#endif
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@ -1481,6 +1483,7 @@ nextbyte:
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case SEND_SDTR:
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ti->flags &= ~DO_SYNC;
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ti->period = ti->offset = 0;
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aic_setsync(sc, ti);
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break;
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#endif
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#if AIC_USE_WIDE
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@ -1525,16 +1528,14 @@ nextbyte:
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ti->period = sc->sc_imess[3];
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ti->offset = sc->sc_imess[4];
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ti->flags &= ~DO_SYNC;
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sc_print_addr(acb->xs->sc_link);
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if (ti->offset == 0) {
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printf("async\n");
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} else if (ti->period < sc->sc_minsync ||
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ti->period > sc->sc_maxsync ||
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ti->offset > 15) {
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printf("async\n");
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ti->offset > 8) {
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ti->period = ti->offset = 0;
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aic_sched_msgout(SEND_SDTR);
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} else {
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sc_print_addr(acb->xs->sc_link);
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printf("sync, offset %d, period %dnsec\n",
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ti->offset, ti->period * 4);
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}
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@ -1548,14 +1549,12 @@ nextbyte:
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goto reject;
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ti->width = sc->sc_imess[3];
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ti->flags &= ~DO_WIDE;
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sc_print_addr(acb->xs->sc_link);
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if (ti->width == 0) {
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printf("narrow\n");
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} else if (ti->width > AIC_MAX_WIDTH) {
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printf("narrow\n");
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ti->width = 0;
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aic_sched_msgout(SEND_WDTR);
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} else {
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sc_print_addr(acb->xs->sc_link);
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printf("wide, width %d\n",
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1 << (3 + ti->width));
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}
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@ -1630,6 +1629,7 @@ aic_msgout(sc)
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{
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struct aic_acb *acb;
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struct aic_tinfo *ti;
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u_char sstat1;
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int n;
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AIC_TRACE(("aic_msgout "));
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@ -1668,15 +1668,16 @@ aic_msgout(sc)
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/* No messages transmitted so far. */
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sc->sc_msgoutq = 0;
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sc->sc_lastmsg = 0;
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nextmsg:
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/* Pick up highest priority message. */
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sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq;
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sc->sc_msgpriq &= ~sc->sc_msgout;
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sc->sc_msgoutq |= sc->sc_msgout;
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sc->sc_currmsg = sc->sc_msgpriq & -sc->sc_msgpriq;
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sc->sc_msgpriq &= ~sc->sc_currmsg;
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sc->sc_msgoutq |= sc->sc_currmsg;
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/* Build the outgoing message data. */
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switch (sc->sc_msgout) {
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switch (sc->sc_currmsg) {
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case SEND_IDENTIFY:
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if (sc->sc_state != AIC_CONNECTED) {
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printf("%s: SEND_IDENTIFY while not connected; sending NOOP\n",
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@ -1753,9 +1754,11 @@ nextmsg:
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break;
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case 0:
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#ifdef AIC_PICKY
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printf("%s: unexpected MESSAGE OUT; sending NOOP\n",
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sc->sc_dev.dv_xname);
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AIC_BREAK();
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#endif
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noop:
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sc->sc_omess[0] = MSG_NOOP;
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n = 1;
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@ -1773,29 +1776,27 @@ nextbyte:
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/* Send message bytes. */
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for (;;) {
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for (;;) {
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u_char sstat1 = inb(SSTAT1);
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if ((sstat1 & (REQINIT|BUSFREE)) == 0) {
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/* Wait for REQINIT. XXX Need timeout. */
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continue;
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}
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if ((sstat1 & (PHASECHG|BUSFREE)) != 0) {
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/*
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* Target left MESSAGE OUT, possibly to reject
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* our message.
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*/
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goto out;
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}
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/* Still in MESSAGE OUT phase, and REQ is asserted. */
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break;
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sstat1 = inb(SSTAT1);
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if ((sstat1 & (REQINIT|BUSFREE)) != 0)
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break;
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/* Wait for REQINIT. XXX Need timeout. */
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}
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if ((sstat1 & (PHASECHG|BUSFREE)) != 0) {
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/*
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* Target left MESSAGE OUT, possibly to reject
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* our message.
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*/
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goto out;
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}
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--n;
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/* Clear ATN before last byte if this is the last message. */
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if (n == 0 && sc->sc_msgpriq == 0)
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if (n == 1 && sc->sc_msgpriq == 0)
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outb(CLRSINT1, CLRATNO);
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/* Send message byte. */
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outb(SCSIDAT, *--sc->sc_omp);
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--n;
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/* Keep track of the last message we've sent any bytes of. */
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sc->sc_lastmsg = sc->sc_currmsg;
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/* Wait for ACK to be negated. XXX Need timeout. */
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while ((inb(SCSISIG) & ACKI) != 0)
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;
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@ -1839,8 +1840,7 @@ aic_dataout_pio(sc, p, n)
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int out = 0;
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#define DOUTAMOUNT 128 /* Full FIFO */
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/* Clear FIFOs and counters. */
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outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
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/* Clear host FIFO and counter. */
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outb(DMACNTRL0, RSTFIFO|WRITE);
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/* Enable FIFOs. */
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outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
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@ -1866,6 +1866,8 @@ aic_dataout_pio(sc, p, n)
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xfer = min(DOUTAMOUNT, n);
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AIC_MISC(("%d> ", xfer));
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n -= xfer;
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out += xfer;
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@ -1891,39 +1893,44 @@ aic_dataout_pio(sc, p, n)
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}
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}
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/* See the bytes off chip */
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for (;;) {
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dmastat = inb(DMASTAT);
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if ((dmastat & DFIFOEMP) != 0 &&
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(inb(SSTAT2) & SEMPTY) != 0)
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break;
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if ((dmastat & INTSTAT) != 0)
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goto phasechange;
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if (out == 0) {
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outb(SXFRCTL1, BITBUCKET);
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for (;;) {
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if ((inb(DMASTAT) & INTSTAT) != 0)
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break;
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}
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outb(SXFRCTL1, 0);
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AIC_MISC(("extra data "));
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} else {
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/* See the bytes off chip */
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for (;;) {
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dmastat = inb(DMASTAT);
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if ((dmastat & DFIFOEMP) != 0 &&
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(inb(SSTAT2) & SEMPTY) != 0)
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break;
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if ((dmastat & INTSTAT) != 0)
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goto phasechange;
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}
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}
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phasechange:
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/* We now have the data off chip. */
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/* Stop the FIFO data path. */
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outb(SXFRCTL0, CHEN);
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while ((inb(SXFRCTL0) & SCSIEN) != 0)
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;
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if ((dmastat & INTSTAT) != 0) {
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/* Some sort of phase change. */
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register u_char sstat2;
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int amount;
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/* Stop transfers, do some accounting */
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amount = inb(FIFOSTAT);
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sstat2 = inb(SSTAT2);
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if ((sstat2 & 7) == 0)
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amount += sstat2 & SFULL ? 8 : 0;
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else
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amount += sstat2 & 7;
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out -= amount;
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AIC_MISC(("+%d ", amount));
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amount = inb(FIFOSTAT) + inb(SSTAT2) & 15;
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if (amount > 0) {
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out -= amount;
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outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
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AIC_MISC(("+%d ", amount));
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}
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}
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outb(DMACNTRL0, RSTFIFO);
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while ((inb(SXFRCTL0) & SCSIEN) != 0)
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;
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/* Turn on ENREQINIT again. */
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outb(SIMODE1, ENSCSIRST|ENSCSIPERR|ENBUSFREE|ENREQINIT|ENPHASECHG);
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@ -1948,8 +1955,7 @@ aic_datain_pio(sc, p, n)
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int in = 0;
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#define DINAMOUNT 128 /* Full FIFO */
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/* Clear FIFOs and counters */
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outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
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/* Clear host FIFO and counter. */
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outb(DMACNTRL0, RSTFIFO);
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/* Enable FIFOs */
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outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
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@ -1973,14 +1979,11 @@ aic_datain_pio(sc, p, n)
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}
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if ((dmastat & DFIFOFULL) != 0)
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xfer = DINAMOUNT;
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else {
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while ((inb(SSTAT2) & SEMPTY) == 0)
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;
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xfer = inb(FIFOSTAT);
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}
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xfer = min(DINAMOUNT, n);
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else
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xfer = min(inb(FIFOSTAT), n);
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xfer = min(xfer, n);
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AIC_MISC((">%d ", xfer));
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n -= xfer;
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in += xfer;
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@ -2007,14 +2010,9 @@ aic_datain_pio(sc, p, n)
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}
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if ((dmastat & INTSTAT) != 0)
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break;
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goto phasechange;
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}
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#if 0
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if (n > 0)
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printf("residual %d\n", n);
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#endif
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/* Some SCSI-devices are rude enough to transfer more data than what
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* was requested, e.g. 2048 bytes from a CD-ROM instead of the
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* requested 512. Test for progress, i.e. real transfers. If no real
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@ -2022,23 +2020,18 @@ aic_datain_pio(sc, p, n)
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* FIFO is not empty, waste some bytes....
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*/
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if (in == 0) {
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int extra = 0;
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outb(SXFRCTL1, BITBUCKET);
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for (;;) {
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dmastat = inb(DMASTAT);
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if ((dmastat & DFIFOEMP) != 0)
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if ((inb(DMASTAT) & INTSTAT) != 0)
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break;
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(void) inb(DMADATA); /* Throw it away */
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extra++;
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}
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AIC_MISC(("aic: %d extra bytes\n", extra));
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outb(SXFRCTL1, 0);
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AIC_MISC(("extra data "));
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}
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/* Stop the FIFO data path */
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phasechange:
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/* Stop the FIFO data path. */
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outb(SXFRCTL0, CHEN);
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outb(DMACNTRL0, RSTFIFO);
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while ((inb(SXFRCTL0) & SCSIEN) != 0)
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;
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@ -2071,6 +2064,7 @@ aicintr(sc)
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AIC_TRACE(("aicintr "));
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loop:
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gotintr:
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/*
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* First check for abnormal conditions, such as reset.
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@ -2179,7 +2173,7 @@ gotintr:
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} else
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sc->sc_msgpriq = SEND_DEV_RESET;
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ti->lubusy |= (1<<sc_link->lun);
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ti->lubusy |= (1 << sc_link->lun);
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/* Do an implicit RESTORE POINTERS. */
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sc->sc_dp = acb->data_addr;
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@ -2210,12 +2204,14 @@ gotintr:
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aic_done(sc, acb);
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goto out;
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} else {
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#ifdef AIC_PICKY
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if (sc->sc_state != AIC_IDLE) {
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printf("%s: BUS FREE while not idle; state=%d\n",
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sc->sc_dev.dv_xname, sc->sc_state);
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AIC_BREAK();
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goto out;
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}
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#endif
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aic_sched(sc);
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goto out;
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@ -2296,14 +2292,18 @@ dophase:
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(sc->sc_flags & AIC_ABORTING) == 0)
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break;
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aic_msgout(sc);
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goto nextphase;
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sc->sc_prevphase = PH_MSGOUT;
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goto loop;
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case PH_MSGIN:
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if ((sc->sc_state & (AIC_CONNECTED|AIC_RESELECTED)) == 0)
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break;
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if (aic_msgin(sc))
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if (aic_msgin(sc)) {
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sc->sc_prevphase = PH_MSGIN;
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goto gotintr;
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goto nextphase;
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}
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sc->sc_prevphase = PH_MSGIN;
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goto loop;
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case PH_CMD:
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if ((sc->sc_state & AIC_CONNECTED) == 0)
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@ -2319,7 +2319,8 @@ dophase:
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n = aic_dataout_pio(sc, sc->sc_cp, sc->sc_cleft);
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sc->sc_cp += n;
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sc->sc_cleft -= n;
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goto nextphase;
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sc->sc_prevphase = PH_CMD;
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goto loop;
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case PH_DATAOUT:
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if ((sc->sc_state & AIC_CONNECTED) == 0)
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@ -2328,7 +2329,8 @@ dophase:
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n = aic_dataout_pio(sc, sc->sc_dp, sc->sc_dleft);
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sc->sc_dp += n;
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sc->sc_dleft -= n;
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goto nextphase;
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sc->sc_prevphase = PH_DATAOUT;
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goto loop;
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case PH_DATAIN:
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if ((sc->sc_state & AIC_CONNECTED) == 0)
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@ -2337,7 +2339,8 @@ dophase:
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n = aic_datain_pio(sc, sc->sc_dp, sc->sc_dleft);
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sc->sc_dp += n;
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sc->sc_dleft -= n;
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goto nextphase;
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sc->sc_prevphase = PH_DATAIN;
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goto loop;
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case PH_STAT:
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if ((sc->sc_state & AIC_CONNECTED) == 0)
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@ -2352,7 +2355,8 @@ dophase:
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while ((inb(SXFRCTL0) & SCSIEN) != 0)
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;
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AIC_MISC(("target_stat=0x%02x ", acb->target_stat));
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goto nextphase;
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sc->sc_prevphase = PH_STAT;
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goto loop;
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}
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printf("%s: unexpected bus phase; resetting\n", sc->sc_dev.dv_xname);
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@ -2361,9 +2365,6 @@ reset:
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aic_init(sc);
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return 1;
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nextphase:
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sc->sc_prevphase = sc->sc_phase;
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out:
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outb(DMACNTRL0, INTEN);
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return 1;
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@ -2502,9 +2503,9 @@ aic_dump_driver(sc)
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int i;
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printf("nexus=%x prevphase=%x\n", sc->sc_nexus, sc->sc_prevphase);
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printf("state=%x msgin=%x msgpriq=%x msgoutq=%x msgout=%x\n",
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printf("state=%x msgin=%x msgpriq=%x msgoutq=%x lastmsg=%x currmsg=%x\n",
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sc->sc_state, sc->sc_imess[0],
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sc->sc_msgpriq, sc->sc_msgoutq, sc->sc_msgout);
|
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sc->sc_msgpriq, sc->sc_msgoutq, sc->sc_lastmsg, sc->sc_currmsg);
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for (i = 0; i < 7; i++) {
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ti = &sc->sc_tinfo[i];
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||||
printf("tinfo%d: %d cmds %d disconnects %d timeouts",
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* $NetBSD: aic6360.c,v 1.28 1995/02/01 16:56:42 mycroft Exp $ */
|
||||
/* $NetBSD: aic6360.c,v 1.29 1995/02/01 21:49:37 mycroft Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1994, 1995 Charles Hannum. All rights reserved.
|
||||
@ -70,8 +70,8 @@
|
||||
#define AIC_USE_DWORDS 0
|
||||
|
||||
/* Synchronous data transfers? */
|
||||
#define AIC_USE_SYNCHRONOUS 0
|
||||
#define AIC_SYNC_REQ_ACK_OFS 15
|
||||
#define AIC_USE_SYNCHRONOUS 1
|
||||
#define AIC_SYNC_REQ_ACK_OFS 8
|
||||
|
||||
/* Wide data transfers? */
|
||||
#define AIC_USE_WIDE 0
|
||||
@ -524,7 +524,8 @@ struct aic_softc {
|
||||
/* Message stuff */
|
||||
u_char sc_msgpriq; /* Messages we want to send */
|
||||
u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */
|
||||
u_char sc_msgout; /* Message last transmitted */
|
||||
u_char sc_lastmsg; /* Message last transmitted */
|
||||
u_char sc_currmsg; /* Message currently ready to transmit */
|
||||
#define SEND_DEV_RESET 0x01
|
||||
#define SEND_PARITY_ERROR 0x02
|
||||
#define SEND_ABORT 0x04
|
||||
@ -1464,16 +1465,17 @@ nextbyte:
|
||||
|
||||
case MSG_PARITY_ERROR:
|
||||
/* Resend the last message. */
|
||||
aic_sched_msgout(sc->sc_msgout);
|
||||
aic_sched_msgout(sc->sc_lastmsg);
|
||||
break;
|
||||
|
||||
case MSG_MESSAGE_REJECT:
|
||||
AIC_MISC(("message rejected "));
|
||||
switch (sc->sc_msgout) {
|
||||
AIC_MISC(("message rejected %02x ", sc->sc_lastmsg));
|
||||
switch (sc->sc_lastmsg) {
|
||||
#if AIC_USE_SYNCHRONOUS + AIC_USE_WIDE
|
||||
case SEND_IDENTIFY:
|
||||
ti->flags &= ~(DO_SYNC|DO_WIDE);
|
||||
ti->period = ti->offset = 0;
|
||||
aic_setsync(sc, ti);
|
||||
ti->width = 0;
|
||||
break;
|
||||
#endif
|
||||
@ -1481,6 +1483,7 @@ nextbyte:
|
||||
case SEND_SDTR:
|
||||
ti->flags &= ~DO_SYNC;
|
||||
ti->period = ti->offset = 0;
|
||||
aic_setsync(sc, ti);
|
||||
break;
|
||||
#endif
|
||||
#if AIC_USE_WIDE
|
||||
@ -1525,16 +1528,14 @@ nextbyte:
|
||||
ti->period = sc->sc_imess[3];
|
||||
ti->offset = sc->sc_imess[4];
|
||||
ti->flags &= ~DO_SYNC;
|
||||
sc_print_addr(acb->xs->sc_link);
|
||||
if (ti->offset == 0) {
|
||||
printf("async\n");
|
||||
} else if (ti->period < sc->sc_minsync ||
|
||||
ti->period > sc->sc_maxsync ||
|
||||
ti->offset > 15) {
|
||||
printf("async\n");
|
||||
ti->offset > 8) {
|
||||
ti->period = ti->offset = 0;
|
||||
aic_sched_msgout(SEND_SDTR);
|
||||
} else {
|
||||
sc_print_addr(acb->xs->sc_link);
|
||||
printf("sync, offset %d, period %dnsec\n",
|
||||
ti->offset, ti->period * 4);
|
||||
}
|
||||
@ -1548,14 +1549,12 @@ nextbyte:
|
||||
goto reject;
|
||||
ti->width = sc->sc_imess[3];
|
||||
ti->flags &= ~DO_WIDE;
|
||||
sc_print_addr(acb->xs->sc_link);
|
||||
if (ti->width == 0) {
|
||||
printf("narrow\n");
|
||||
} else if (ti->width > AIC_MAX_WIDTH) {
|
||||
printf("narrow\n");
|
||||
ti->width = 0;
|
||||
aic_sched_msgout(SEND_WDTR);
|
||||
} else {
|
||||
sc_print_addr(acb->xs->sc_link);
|
||||
printf("wide, width %d\n",
|
||||
1 << (3 + ti->width));
|
||||
}
|
||||
@ -1630,6 +1629,7 @@ aic_msgout(sc)
|
||||
{
|
||||
struct aic_acb *acb;
|
||||
struct aic_tinfo *ti;
|
||||
u_char sstat1;
|
||||
int n;
|
||||
|
||||
AIC_TRACE(("aic_msgout "));
|
||||
@ -1668,15 +1668,16 @@ aic_msgout(sc)
|
||||
|
||||
/* No messages transmitted so far. */
|
||||
sc->sc_msgoutq = 0;
|
||||
sc->sc_lastmsg = 0;
|
||||
|
||||
nextmsg:
|
||||
/* Pick up highest priority message. */
|
||||
sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq;
|
||||
sc->sc_msgpriq &= ~sc->sc_msgout;
|
||||
sc->sc_msgoutq |= sc->sc_msgout;
|
||||
sc->sc_currmsg = sc->sc_msgpriq & -sc->sc_msgpriq;
|
||||
sc->sc_msgpriq &= ~sc->sc_currmsg;
|
||||
sc->sc_msgoutq |= sc->sc_currmsg;
|
||||
|
||||
/* Build the outgoing message data. */
|
||||
switch (sc->sc_msgout) {
|
||||
switch (sc->sc_currmsg) {
|
||||
case SEND_IDENTIFY:
|
||||
if (sc->sc_state != AIC_CONNECTED) {
|
||||
printf("%s: SEND_IDENTIFY while not connected; sending NOOP\n",
|
||||
@ -1753,9 +1754,11 @@ nextmsg:
|
||||
break;
|
||||
|
||||
case 0:
|
||||
#ifdef AIC_PICKY
|
||||
printf("%s: unexpected MESSAGE OUT; sending NOOP\n",
|
||||
sc->sc_dev.dv_xname);
|
||||
AIC_BREAK();
|
||||
#endif
|
||||
noop:
|
||||
sc->sc_omess[0] = MSG_NOOP;
|
||||
n = 1;
|
||||
@ -1773,29 +1776,27 @@ nextbyte:
|
||||
/* Send message bytes. */
|
||||
for (;;) {
|
||||
for (;;) {
|
||||
u_char sstat1 = inb(SSTAT1);
|
||||
if ((sstat1 & (REQINIT|BUSFREE)) == 0) {
|
||||
/* Wait for REQINIT. XXX Need timeout. */
|
||||
continue;
|
||||
}
|
||||
if ((sstat1 & (PHASECHG|BUSFREE)) != 0) {
|
||||
/*
|
||||
* Target left MESSAGE OUT, possibly to reject
|
||||
* our message.
|
||||
*/
|
||||
goto out;
|
||||
}
|
||||
/* Still in MESSAGE OUT phase, and REQ is asserted. */
|
||||
break;
|
||||
sstat1 = inb(SSTAT1);
|
||||
if ((sstat1 & (REQINIT|BUSFREE)) != 0)
|
||||
break;
|
||||
/* Wait for REQINIT. XXX Need timeout. */
|
||||
}
|
||||
if ((sstat1 & (PHASECHG|BUSFREE)) != 0) {
|
||||
/*
|
||||
* Target left MESSAGE OUT, possibly to reject
|
||||
* our message.
|
||||
*/
|
||||
goto out;
|
||||
}
|
||||
|
||||
--n;
|
||||
|
||||
/* Clear ATN before last byte if this is the last message. */
|
||||
if (n == 0 && sc->sc_msgpriq == 0)
|
||||
if (n == 1 && sc->sc_msgpriq == 0)
|
||||
outb(CLRSINT1, CLRATNO);
|
||||
/* Send message byte. */
|
||||
outb(SCSIDAT, *--sc->sc_omp);
|
||||
--n;
|
||||
/* Keep track of the last message we've sent any bytes of. */
|
||||
sc->sc_lastmsg = sc->sc_currmsg;
|
||||
/* Wait for ACK to be negated. XXX Need timeout. */
|
||||
while ((inb(SCSISIG) & ACKI) != 0)
|
||||
;
|
||||
@ -1839,8 +1840,7 @@ aic_dataout_pio(sc, p, n)
|
||||
int out = 0;
|
||||
#define DOUTAMOUNT 128 /* Full FIFO */
|
||||
|
||||
/* Clear FIFOs and counters. */
|
||||
outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
|
||||
/* Clear host FIFO and counter. */
|
||||
outb(DMACNTRL0, RSTFIFO|WRITE);
|
||||
/* Enable FIFOs. */
|
||||
outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
|
||||
@ -1866,6 +1866,8 @@ aic_dataout_pio(sc, p, n)
|
||||
|
||||
xfer = min(DOUTAMOUNT, n);
|
||||
|
||||
AIC_MISC(("%d> ", xfer));
|
||||
|
||||
n -= xfer;
|
||||
out += xfer;
|
||||
|
||||
@ -1891,39 +1893,44 @@ aic_dataout_pio(sc, p, n)
|
||||
}
|
||||
}
|
||||
|
||||
/* See the bytes off chip */
|
||||
for (;;) {
|
||||
dmastat = inb(DMASTAT);
|
||||
if ((dmastat & DFIFOEMP) != 0 &&
|
||||
(inb(SSTAT2) & SEMPTY) != 0)
|
||||
break;
|
||||
if ((dmastat & INTSTAT) != 0)
|
||||
goto phasechange;
|
||||
if (out == 0) {
|
||||
outb(SXFRCTL1, BITBUCKET);
|
||||
for (;;) {
|
||||
if ((inb(DMASTAT) & INTSTAT) != 0)
|
||||
break;
|
||||
}
|
||||
outb(SXFRCTL1, 0);
|
||||
AIC_MISC(("extra data "));
|
||||
} else {
|
||||
/* See the bytes off chip */
|
||||
for (;;) {
|
||||
dmastat = inb(DMASTAT);
|
||||
if ((dmastat & DFIFOEMP) != 0 &&
|
||||
(inb(SSTAT2) & SEMPTY) != 0)
|
||||
break;
|
||||
if ((dmastat & INTSTAT) != 0)
|
||||
goto phasechange;
|
||||
}
|
||||
}
|
||||
|
||||
phasechange:
|
||||
/* We now have the data off chip. */
|
||||
/* Stop the FIFO data path. */
|
||||
outb(SXFRCTL0, CHEN);
|
||||
while ((inb(SXFRCTL0) & SCSIEN) != 0)
|
||||
;
|
||||
|
||||
if ((dmastat & INTSTAT) != 0) {
|
||||
/* Some sort of phase change. */
|
||||
register u_char sstat2;
|
||||
int amount;
|
||||
|
||||
/* Stop transfers, do some accounting */
|
||||
amount = inb(FIFOSTAT);
|
||||
sstat2 = inb(SSTAT2);
|
||||
if ((sstat2 & 7) == 0)
|
||||
amount += sstat2 & SFULL ? 8 : 0;
|
||||
else
|
||||
amount += sstat2 & 7;
|
||||
out -= amount;
|
||||
AIC_MISC(("+%d ", amount));
|
||||
amount = inb(FIFOSTAT) + inb(SSTAT2) & 15;
|
||||
if (amount > 0) {
|
||||
out -= amount;
|
||||
outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
|
||||
AIC_MISC(("+%d ", amount));
|
||||
}
|
||||
}
|
||||
|
||||
outb(DMACNTRL0, RSTFIFO);
|
||||
while ((inb(SXFRCTL0) & SCSIEN) != 0)
|
||||
;
|
||||
|
||||
/* Turn on ENREQINIT again. */
|
||||
outb(SIMODE1, ENSCSIRST|ENSCSIPERR|ENBUSFREE|ENREQINIT|ENPHASECHG);
|
||||
@ -1948,8 +1955,7 @@ aic_datain_pio(sc, p, n)
|
||||
int in = 0;
|
||||
#define DINAMOUNT 128 /* Full FIFO */
|
||||
|
||||
/* Clear FIFOs and counters */
|
||||
outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
|
||||
/* Clear host FIFO and counter. */
|
||||
outb(DMACNTRL0, RSTFIFO);
|
||||
/* Enable FIFOs */
|
||||
outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
|
||||
@ -1973,14 +1979,11 @@ aic_datain_pio(sc, p, n)
|
||||
}
|
||||
|
||||
if ((dmastat & DFIFOFULL) != 0)
|
||||
xfer = DINAMOUNT;
|
||||
else {
|
||||
while ((inb(SSTAT2) & SEMPTY) == 0)
|
||||
;
|
||||
xfer = inb(FIFOSTAT);
|
||||
}
|
||||
xfer = min(DINAMOUNT, n);
|
||||
else
|
||||
xfer = min(inb(FIFOSTAT), n);
|
||||
|
||||
xfer = min(xfer, n);
|
||||
AIC_MISC((">%d ", xfer));
|
||||
|
||||
n -= xfer;
|
||||
in += xfer;
|
||||
@ -2007,14 +2010,9 @@ aic_datain_pio(sc, p, n)
|
||||
}
|
||||
|
||||
if ((dmastat & INTSTAT) != 0)
|
||||
break;
|
||||
goto phasechange;
|
||||
}
|
||||
|
||||
#if 0
|
||||
if (n > 0)
|
||||
printf("residual %d\n", n);
|
||||
#endif
|
||||
|
||||
/* Some SCSI-devices are rude enough to transfer more data than what
|
||||
* was requested, e.g. 2048 bytes from a CD-ROM instead of the
|
||||
* requested 512. Test for progress, i.e. real transfers. If no real
|
||||
@ -2022,23 +2020,18 @@ aic_datain_pio(sc, p, n)
|
||||
* FIFO is not empty, waste some bytes....
|
||||
*/
|
||||
if (in == 0) {
|
||||
int extra = 0;
|
||||
|
||||
outb(SXFRCTL1, BITBUCKET);
|
||||
for (;;) {
|
||||
dmastat = inb(DMASTAT);
|
||||
if ((dmastat & DFIFOEMP) != 0)
|
||||
if ((inb(DMASTAT) & INTSTAT) != 0)
|
||||
break;
|
||||
(void) inb(DMADATA); /* Throw it away */
|
||||
extra++;
|
||||
}
|
||||
|
||||
AIC_MISC(("aic: %d extra bytes\n", extra));
|
||||
outb(SXFRCTL1, 0);
|
||||
AIC_MISC(("extra data "));
|
||||
}
|
||||
|
||||
/* Stop the FIFO data path */
|
||||
phasechange:
|
||||
/* Stop the FIFO data path. */
|
||||
outb(SXFRCTL0, CHEN);
|
||||
|
||||
outb(DMACNTRL0, RSTFIFO);
|
||||
while ((inb(SXFRCTL0) & SCSIEN) != 0)
|
||||
;
|
||||
|
||||
@ -2071,6 +2064,7 @@ aicintr(sc)
|
||||
|
||||
AIC_TRACE(("aicintr "));
|
||||
|
||||
loop:
|
||||
gotintr:
|
||||
/*
|
||||
* First check for abnormal conditions, such as reset.
|
||||
@ -2179,7 +2173,7 @@ gotintr:
|
||||
} else
|
||||
sc->sc_msgpriq = SEND_DEV_RESET;
|
||||
|
||||
ti->lubusy |= (1<<sc_link->lun);
|
||||
ti->lubusy |= (1 << sc_link->lun);
|
||||
|
||||
/* Do an implicit RESTORE POINTERS. */
|
||||
sc->sc_dp = acb->data_addr;
|
||||
@ -2210,12 +2204,14 @@ gotintr:
|
||||
aic_done(sc, acb);
|
||||
goto out;
|
||||
} else {
|
||||
#ifdef AIC_PICKY
|
||||
if (sc->sc_state != AIC_IDLE) {
|
||||
printf("%s: BUS FREE while not idle; state=%d\n",
|
||||
sc->sc_dev.dv_xname, sc->sc_state);
|
||||
AIC_BREAK();
|
||||
goto out;
|
||||
}
|
||||
#endif
|
||||
|
||||
aic_sched(sc);
|
||||
goto out;
|
||||
@ -2296,14 +2292,18 @@ dophase:
|
||||
(sc->sc_flags & AIC_ABORTING) == 0)
|
||||
break;
|
||||
aic_msgout(sc);
|
||||
goto nextphase;
|
||||
sc->sc_prevphase = PH_MSGOUT;
|
||||
goto loop;
|
||||
|
||||
case PH_MSGIN:
|
||||
if ((sc->sc_state & (AIC_CONNECTED|AIC_RESELECTED)) == 0)
|
||||
break;
|
||||
if (aic_msgin(sc))
|
||||
if (aic_msgin(sc)) {
|
||||
sc->sc_prevphase = PH_MSGIN;
|
||||
goto gotintr;
|
||||
goto nextphase;
|
||||
}
|
||||
sc->sc_prevphase = PH_MSGIN;
|
||||
goto loop;
|
||||
|
||||
case PH_CMD:
|
||||
if ((sc->sc_state & AIC_CONNECTED) == 0)
|
||||
@ -2319,7 +2319,8 @@ dophase:
|
||||
n = aic_dataout_pio(sc, sc->sc_cp, sc->sc_cleft);
|
||||
sc->sc_cp += n;
|
||||
sc->sc_cleft -= n;
|
||||
goto nextphase;
|
||||
sc->sc_prevphase = PH_CMD;
|
||||
goto loop;
|
||||
|
||||
case PH_DATAOUT:
|
||||
if ((sc->sc_state & AIC_CONNECTED) == 0)
|
||||
@ -2328,7 +2329,8 @@ dophase:
|
||||
n = aic_dataout_pio(sc, sc->sc_dp, sc->sc_dleft);
|
||||
sc->sc_dp += n;
|
||||
sc->sc_dleft -= n;
|
||||
goto nextphase;
|
||||
sc->sc_prevphase = PH_DATAOUT;
|
||||
goto loop;
|
||||
|
||||
case PH_DATAIN:
|
||||
if ((sc->sc_state & AIC_CONNECTED) == 0)
|
||||
@ -2337,7 +2339,8 @@ dophase:
|
||||
n = aic_datain_pio(sc, sc->sc_dp, sc->sc_dleft);
|
||||
sc->sc_dp += n;
|
||||
sc->sc_dleft -= n;
|
||||
goto nextphase;
|
||||
sc->sc_prevphase = PH_DATAIN;
|
||||
goto loop;
|
||||
|
||||
case PH_STAT:
|
||||
if ((sc->sc_state & AIC_CONNECTED) == 0)
|
||||
@ -2352,7 +2355,8 @@ dophase:
|
||||
while ((inb(SXFRCTL0) & SCSIEN) != 0)
|
||||
;
|
||||
AIC_MISC(("target_stat=0x%02x ", acb->target_stat));
|
||||
goto nextphase;
|
||||
sc->sc_prevphase = PH_STAT;
|
||||
goto loop;
|
||||
}
|
||||
|
||||
printf("%s: unexpected bus phase; resetting\n", sc->sc_dev.dv_xname);
|
||||
@ -2361,9 +2365,6 @@ reset:
|
||||
aic_init(sc);
|
||||
return 1;
|
||||
|
||||
nextphase:
|
||||
sc->sc_prevphase = sc->sc_phase;
|
||||
|
||||
out:
|
||||
outb(DMACNTRL0, INTEN);
|
||||
return 1;
|
||||
@ -2502,9 +2503,9 @@ aic_dump_driver(sc)
|
||||
int i;
|
||||
|
||||
printf("nexus=%x prevphase=%x\n", sc->sc_nexus, sc->sc_prevphase);
|
||||
printf("state=%x msgin=%x msgpriq=%x msgoutq=%x msgout=%x\n",
|
||||
printf("state=%x msgin=%x msgpriq=%x msgoutq=%x lastmsg=%x currmsg=%x\n",
|
||||
sc->sc_state, sc->sc_imess[0],
|
||||
sc->sc_msgpriq, sc->sc_msgoutq, sc->sc_msgout);
|
||||
sc->sc_msgpriq, sc->sc_msgoutq, sc->sc_lastmsg, sc->sc_currmsg);
|
||||
for (i = 0; i < 7; i++) {
|
||||
ti = &sc->sc_tinfo[i];
|
||||
printf("tinfo%d: %d cmds %d disconnects %d timeouts",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user