eb11af29b5
Next attempt at trying to fix the irregular interrupt storms on my Thinkpad: when we find a PCI Express device, check the list of notification events and if any are sets, clear them. We can't handle them ATM anyway.
153 lines
4.8 KiB
C
153 lines
4.8 KiB
C
/* $NetBSD: ppb.c,v 1.35 2007/10/16 18:27:00 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1996, 1998 Christopher G. Demetriou. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* 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 by Christopher G. Demetriou
|
|
* for the NetBSD Project.
|
|
* 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 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: ppb.c,v 1.35 2007/10/16 18:27:00 joerg Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <dev/pci/pcireg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/ppbreg.h>
|
|
|
|
struct ppb_softc {
|
|
struct device sc_dev; /* generic device glue */
|
|
pci_chipset_tag_t sc_pc; /* our PCI chipset... */
|
|
pcitag_t sc_tag; /* ...and tag. */
|
|
};
|
|
|
|
static int
|
|
ppbmatch(struct device *parent, struct cfdata *match,
|
|
void *aux)
|
|
{
|
|
struct pci_attach_args *pa = aux;
|
|
|
|
/*
|
|
* Check the ID register to see that it's a PCI bridge.
|
|
* If it is, we assume that we can deal with it; it _should_
|
|
* work in a standardized way...
|
|
*/
|
|
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
|
|
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ppb_fix_pcix(device_t self, struct pci_attach_args *pa)
|
|
{
|
|
pcireg_t reg;
|
|
int off;
|
|
|
|
if (!pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_PCIEXPRESS,
|
|
&off, ®))
|
|
return; /* Not a PCIe device */
|
|
|
|
if ((reg & 0x000f0000) != 0x00010000) {
|
|
aprint_normal_dev(self, "unuspported PCI Express version\n");
|
|
return;
|
|
}
|
|
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, off + 0x18);
|
|
if (reg & 0x003f) {
|
|
aprint_normal_dev(self, "disabling notification events\n");
|
|
reg &= ~0x003f;
|
|
pci_conf_write(pa->pa_pc, pa->pa_tag, off + 0x18, reg);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ppbattach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct ppb_softc *sc = (void *) self;
|
|
struct pci_attach_args *pa = aux;
|
|
pci_chipset_tag_t pc = pa->pa_pc;
|
|
struct pcibus_attach_args pba;
|
|
pcireg_t busdata;
|
|
char devinfo[256];
|
|
|
|
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
|
|
aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
|
|
PCI_REVISION(pa->pa_class));
|
|
aprint_naive("\n");
|
|
|
|
sc->sc_pc = pc;
|
|
sc->sc_tag = pa->pa_tag;
|
|
|
|
busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
|
|
|
|
if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
|
|
aprint_normal("%s: not configured by system firmware\n",
|
|
self->dv_xname);
|
|
return;
|
|
}
|
|
|
|
ppb_fix_pcix(self, pa);
|
|
|
|
#if 0
|
|
/*
|
|
* XXX can't do this, because we're not given our bus number
|
|
* (we shouldn't need it), and because we've no way to
|
|
* decompose our tag.
|
|
*/
|
|
/* sanity check. */
|
|
if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
|
|
panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
|
|
pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
|
|
#endif
|
|
|
|
/*
|
|
* Attach the PCI bus than hangs off of it.
|
|
*
|
|
* XXX Don't pass-through Memory Read Multiple. Should we?
|
|
* XXX Consult the spec...
|
|
*/
|
|
pba.pba_iot = pa->pa_iot;
|
|
pba.pba_memt = pa->pa_memt;
|
|
pba.pba_dmat = pa->pa_dmat;
|
|
pba.pba_dmat64 = pa->pa_dmat64;
|
|
pba.pba_pc = pc;
|
|
pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY;
|
|
pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
|
|
pba.pba_bridgetag = &sc->sc_tag;
|
|
pba.pba_intrswiz = pa->pa_intrswiz;
|
|
pba.pba_intrtag = pa->pa_intrtag;
|
|
|
|
config_found_ia(self, "pcibus", &pba, pcibusprint);
|
|
}
|
|
|
|
CFATTACH_DECL(ppb, sizeof(struct ppb_softc),
|
|
ppbmatch, ppbattach, NULL, NULL);
|