case FSR_TT_NONE:
- panic("fpu_cleanup 1"); /* ??? */
+#if 0
+ /* XXX I'm not sure how we get here, but ignoring the trap */
+ /* XXX seems to work in my limited tests */
+ /* XXX More research to be done =) */
+ panic("fpu_cleanup 1"); /* ??? */
+#else
+ printf("fpu_cleanup 1\n");
+#endif
break;
/* ARGSUSED */
-static void
+void
memregattach(parent, self, aux)
struct device *parent, *self;
void *aux;
@@ -188,7 +188,7 @@
* of the error register are printed.
*/
-static void
+void
hardmemerr4m(issync, fsr, faddr)
int issync;
u_int fsr, faddr;
@@ -224,8 +224,8 @@
* once, and then fail if we get called again.
*/
-static int addrold = (int) 0xdeadbeef; /* We pick an unlikely address */
-static int addroldtop = (int) 0xdeadbeef;
+static int addrold = (int)0xdeadbeef; /* We pick an unlikely address */
+static int addroldtop = (int)0xdeadbeef;
static int oldtype = -1;
- NCRCMD(sc, NCRCMD_FLUSH);
-
/*
* The docs say the target register is never reset, and I
* can't think of a better place to set it
@@ -450,29 +450,34 @@
NCR_WRITE_REG(sc, NCR_SELID, target);
ncr53c9x_setsync(sc, ti);
+ /* load the count in */
+ NCRCMD(sc, NCRCMD_NOP|NCRCMD_DMA);
+
/* And get the targets attention */
NCRCMD(sc, NCRCMD_SELATN | NCRCMD_DMA);
NCRDMA_GO(sc);
return;
}
+
/*
* Who am I. This is where we tell the target that we are
* happy for it to disconnect etc.
@@ -671,7 +676,8 @@
break;
} else
NCR_MISC(("%d:%d busy\n",
- sc_link->target, sc_link->lun));
+ sc_link->target,
+ sc_link->lun));
}
}
+ /*
+ * XXX - the NCR_ATN flag is not in sync with the actual ATN
+ * condition on the SCSI bus. The 53c9x chip
+ * automatically turns off ATN before sending the
+ * message byte. (see also the comment below in the
+ * default case when picking out a message to send)
+ */
if (sc->sc_flags & NCR_ATN) {
if (sc->sc_prevphase != MESSAGE_OUT_PHASE) {
new:
@@ -1244,7 +1256,19 @@
sc->sc_omess[0] = MSG_MESSAGE_REJECT;
break;
default:
- NCRCMD(sc, NCRCMD_RSTATN);
+ /*
+ * We normally do not get here, since the chip
+ * automatically turns off ATN before the last
+ * byte of a message is sent to the target.
+ * However, if the target rejects our (multi-byte)
+ * message early by switching to MSG IN phase
+ * ATN remains on, so the target may return to
+ * MSG OUT phase. If there are no scheduled messages
+ * left we send a NO-OP.
+ *
+ * XXX - Note that this leaves no useful purpose for
+ * the NCR_ATN flag.
+ */
sc->sc_flags &= ~NCR_ATN;
sc->sc_omess[0] = MSG_NOOP;
break;
@@ -1252,7 +1276,6 @@
sc->sc_omp = sc->sc_omess;
}
-#if 1
/* (re)send the message */
size = min(sc->sc_omlen, sc->sc_maxxfer);
NCRDMA_SETUP(sc, &sc->sc_omp, &sc->sc_omlen, 0, &size);
@@ -1262,18 +1285,10 @@
if (sc->sc_cfg2 & NCRCFG2_FE) {
NCR_WRITE_REG(sc, NCR_TCH, size >> 16);
}
- /* load the count in */
+ /* Load the count in and start the message-out transfer */
NCRCMD(sc, NCRCMD_NOP|NCRCMD_DMA);
NCRCMD(sc, NCRCMD_TRANS|NCRCMD_DMA);
NCRDMA_GO(sc);
-#else
- { int i;
- for (i = 0; i < sc->sc_omlen; i++)
- NCR_WRITE_REG(sc, FIFO, sc->sc_omess[i]);
- NCRCMD(sc, NCRCMD_TRANS);
- sc->sc_omlen = 0;
- }
-#endif
}
/*
@@ -1394,7 +1409,16 @@
if (sc->sc_espintr & NCRINTR_ILL) {
if (sc->sc_flags & NCR_EXPECT_ILLCMD) {
-printf("%s: ILL: ESP100 work-around activated\n", sc->sc_dev.dv_xname);
+ /*
+ * Eat away "Illegal command" interrupt
+ * on a ESP100 caused by a re-selection
+ * while we were trying to select
+ * another target.
+ */
+#ifdef DEBUG
+ printf("%s: ESP100 work-around activated\n",
+ sc->sc_dev.dv_xname);
+#endif
sc->sc_flags &= ~NCR_EXPECT_ILLCMD;
continue;
}
@@ -1432,23 +1456,53 @@
if (NCRDMA_ISACTIVE(sc))
return 1;
- /*
- * Note that this can happen during normal operation
- * if we are reselected while using DMA to select
- * a target. If this is the case, don't issue the
- * warning.
- */
- if (sc->sc_dleft == 0 &&
- (sc->sc_espstat & NCRSTAT_TC) == 0 &&
- sc->sc_state != NCR_SELECTING)
- printf("%s: !TC [intr %x, stat %x, step %d]"
- " prevphase %x, resid %x\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr,
- sc->sc_espstat,
- sc->sc_espstep,
- sc->sc_prevphase,
- ecb?ecb->dleft:-1);
+ if ((sc->sc_espstat & NCRSTAT_TC) == 0) {
+ /*
+ * DMA not completed. If we can not find a
+ * acceptable explanation, print a diagnostic.
+ */
+ if (sc->sc_state == NCR_SELECTING)
+ /*
+ * This can happen if we are reselected
+ * while using DMA to select a target.
+ */
+ /*void*/;
+ else if (sc->sc_prevphase == MESSAGE_OUT_PHASE){
+ /*
+ * Our (multi-byte) message (eg SDTR)
+ * was interrupted by the target to
+ * send a MSG REJECT.
+ * Print diagnostic if current phase
+ * is not MESSAGE IN.
+ */
+ if (sc->sc_phase != MESSAGE_IN_PHASE)
+ printf("%s: !TC on MSG OUT"
+ " [intr %x, stat %x, step %d]"
+ " prevphase %x, resid %x\n",
+ sc->sc_dev.dv_xname,
+ sc->sc_espintr,
+ sc->sc_espstat,
+ sc->sc_espstep,
+ sc->sc_prevphase,
+ sc->sc_omlen);
+ } else if (sc->sc_dleft == 0) {
+ /*
+ * The DMA operation was started for
+ * a DATA transfer. Print a diagnostic
+ * if the DMA counter and TC bit
+ * appear to be out of sync.
+ */
+ printf("%s: !TC on DATA XFER"
+ " [intr %x, stat %x, step %d]"
+ " prevphase %x, resid %x\n",
+ sc->sc_dev.dv_xname,
+ sc->sc_espintr,
+ sc->sc_espstat,
+ sc->sc_espstep,
+ sc->sc_prevphase,
+ ecb?ecb->dleft:-1);
+ }
+ }
}
#if 0 /* Unreliable on some NCR revisions? */
@@ -1483,6 +1537,7 @@
* 250mS of a disconnect. So here you are...
*/
NCRCMD(sc, NCRCMD_ENSEL);
+
switch (sc->sc_state) {
case NCR_RESELECTED:
goto sched;
@@ -1571,7 +1626,6 @@
break;
case NCR_IDLE:
-if (sc->sc_flags & NCR_ICCS) printf("[[esp: BUMMER]]");
case NCR_SELECTING:
sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0;
sc->sc_flags = 0;
@@ -1635,8 +1689,15 @@
/* Handle identify message */
ncr53c9x_msgin(sc);
if (nfifo != 2) {
+ /*
+ * Note: this should not happen
+ * with `dmaselect' on.
+ */
sc->sc_flags |= NCR_EXPECT_ILLCMD;
NCRCMD(sc, NCRCMD_FLUSH);
+ } else if (ncr53c9x_dmaselect &&
+ sc->sc_rev == NCR_VARIANT_ESP100) {
+ sc->sc_flags |= NCR_EXPECT_ILLCMD;
}
if (sc->sc_state != NCR_CONNECTED) {
@@ -1660,11 +1721,17 @@
switch (sc->sc_espstep) {
case 0:
- printf("%s: select timeout/no "
- "disconnect\n",
- sc->sc_dev.dv_xname);
- ecb->xs->error = XS_SELTIMEOUT;
- goto finish;
+ /*
+ * The target did not respond with a
+ * message out phase - probably an old
+ * device that doesn't recognize ATN.
+ * Clear ATN and just continue, the
+ * target should be in the command
+ * phase.
+ * XXXX check for command phase?
+ */
+ NCRCMD(sc, NCRCMD_RSTATN);
+ break;
case 1:
if ((ti->flags & T_NEGOTIATE) == 0) {
printf("%s: step 1 & !NEG\n",
@@ -1721,11 +1788,15 @@
if (ncr53c9x_dmaselect &&
sc->sc_cmdlen != 0)
printf("(%s:%d:%d): select; "
- "%d left in DMA buffer\n",
+ "%d left in DMA buffer "
+ "[intr %x, stat %x, step %d]\n",
sc->sc_dev.dv_xname,
sc_link->target,
sc_link->lun,
- sc->sc_cmdlen);
+ sc->sc_cmdlen,
+ sc->sc_espintr,
+ sc->sc_espstat,
+ sc->sc_espstep);
/* So far, everything went fine */
break;
}
@@ -1854,7 +1925,7 @@
* Send the command block. Normally we don't see this
* phase because the SEL_ATN command takes care of
* all this. However, we end up here if either the
- * target or we wanted exchange some more messages
+ * target or we wanted to exchange some more messages
* first (e.g. to start negotiations).
*/
-/*
- * Copyright (c) 1997 Jason R. Thorpe.
+/*-
+ * Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+ * NASA Ames Research Center.
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -15,21 +19,23 @@
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
- * This product includes software developed for the NetBSD Project
- * by Jason R. Thorpe.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*/
