Hi,

       From: Berndt Josef Wulf <wulf@dingo.ping.net.au>
    Subject: Inspiron 8100: NetBSD/ex0 timeout
      Date : Thu, 07 Feb 2002 01:08:32 +1030 (CST)
 Message-ID: <200202061438.g16EcYq27671@dingo.ping.net.au>

$ ex0 at pci2 dev 6 function 0: 3Com 3c556 MiniPCI 10/100 Ethernet (rev.
$ 0x10)
$ ex0 interrupting at irq 10
$ ex0 MAC address 00:04:76:4c:9a:55
$ tqphy0 at ex0 phy 0: 78Q2120 10/100 media interface, rev. 11
$ tqphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
$ 3Com product 0x1007 (miscellaneous communications, revision 0x10) at
$ pci2 dev 6 function 1 not configured
$ 
$ When configuring ex0 using ifconfig the following message gets printed
$ to the console:
$ 
$ /netbsd: ex0: device timeout

$ Kernel: NetBSD-1.5.1

I think that next patch may help for you.
How about trying next patch?
Regards!
---
 Masanori Kanaoka	kanaoka@ann.hi-ho.ne.jp

commit-log
----------------------------
revision 1.12.4.3
date: 2002/01/01 12:21:38;  author: he;  state: Exp;  lines: +23 -10
Pull up revision 1.18 (requested by kanaoka):
  Improve intr_ack code to support 3c556 and 3c556B.
----------------------------
Index: if_ex_pci.c
===================================================================
RCS file: /ftp/cvs/syssrc/sys/dev/pci/if_ex_pci.c,v
retrieving revision 1.12.4.2
retrieving revision 1.12.4.3
diff -u -r1.12.4.2 -r1.12.4.3
--- if_ex_pci.c	2001/03/20 17:25:33	1.12.4.2
+++ if_ex_pci.c	2002/01/01 12:21:38	1.12.4.3
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_ex_pci.c,v 1.12.4.1 2000/10/19 13:54:28 he Exp $	*/
+/*	$NetBSD: if_ex_pci.c,v 1.12.4.2 2001/03/20 17:25:33 he Exp $	*/
 
 /*-
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -92,8 +92,11 @@
 
 struct ex_pci_softc {
 	struct ex_softc sc_ex;
-	pci_chipset_tag_t sc_chiptag;
-	pcitag_t sc_pcitag;
+
+	/* PCI function status space. 556,556B requests it. */
+	bus_space_tag_t sc_funct;
+	bus_space_handle_t sc_funch;
+
 };
 
 /*
@@ -105,6 +108,7 @@
 #define PCI_POWERCTL		0xe0
 #define PCI_FUNCMEM		0x18
 
+#define PCI_INTR		4
 #define PCI_INTRACK		0x00008000
 
 int ex_pci_match __P((struct device *, struct cfdata *, void *));
@@ -258,6 +262,17 @@
 	    pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
 	    PCI_COMMAND_MASTER_ENABLE);
 
+	if (sc->ex_conf & EX_CONF_PCI_FUNCREG) {
+		/* Map PCI function status window. */
+		if (pci_mapreg_map(pa, PCI_FUNCMEM, PCI_MAPREG_TYPE_MEM, 0,
+		    &psc->sc_funct, &psc->sc_funch, NULL, NULL)) {
+			printf("%s: unable to map function status window\n",
+			    sc->sc_dev.dv_xname);
+			return;
+		}
+		sc->intr_ack = ex_pci_intr_ack;
+	}
+		
 	/* Get it out of power save mode if needed (BIOS bugs) */
 	if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pmreg, 0)) {
 		reg = pci_conf_read(pc, pa->pa_tag, pmreg + 4) & 0x3;
@@ -284,12 +299,6 @@
 		return;
 	}
 
-	if (sc->ex_conf & EX_CONF_PCI_FUNCREG) {
-		sc->intr_ack = ex_pci_intr_ack;
-		psc->sc_chiptag = pa->pa_pc;
-		psc->sc_pcitag = pa->pa_tag;
-	}
-
 	intrstr = pci_intr_string(pc, ih);
 	sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, ex_intr, sc);
 	if (sc->sc_ih == NULL) {
@@ -303,6 +312,10 @@
 	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
 
 	ex_config(sc);
+
+	if (sc->ex_conf & EX_CONF_PCI_FUNCREG)
+		bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR, 
+		    PCI_INTRACK);
 }
 
 void            
@@ -311,6 +324,6 @@
 {
 	struct ex_pci_softc *psc = (struct ex_pci_softc *)sc;
         
-	pci_conf_write(psc->sc_chiptag, psc->sc_pcitag, PCI_FUNCMEM + 4,
+	bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR,
 	    PCI_INTRACK);
 }