NetBSD-5.0.2/sys/arch/x86/pci/pci_intr_machdep.c
/* $NetBSD: pci_intr_machdep.c,v 1.12 2008/07/03 14:02:25 drochner Exp $ */
/*-
* Copyright (c) 1997, 1998 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:
* 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.
*
* 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.
*/
/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles M. Hannum. 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 Charles M. Hannum.
* 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.
*/
/*
* Machine-specific functions for PCI autoconfiguration.
*
* On PCs, there are two methods of generating PCI configuration cycles.
* We try to detect the appropriate mechanism for this machine and set
* up a few function pointers to access the correct method directly.
*
* The configuration method can be hard-coded in the config file by
* using `options PCI_CONF_MODE=N', where `N' is the configuration mode
* as defined section 3.6.4.1, `Generating Configuration Cycles'.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.12 2008/07/03 14:02:25 drochner Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <uvm/uvm_extern.h>
#include <dev/pci/pcivar.h>
#include "ioapic.h"
#include "eisa.h"
#include "acpi.h"
#include "opt_mpbios.h"
#include "opt_acpi.h"
#if NIOAPIC > 0 || NACPI > 0
#include <machine/i82093var.h>
#include <machine/mpconfig.h>
#include <machine/mpbiosvar.h>
#include <machine/pic.h>
#endif
#ifdef MPBIOS
#include <machine/mpbiosvar.h>
#endif
#if NACPI > 0
#include <machine/mpacpi.h>
#endif
#define MPSAFE_MASK 0x80000000
int
pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_intrpin;
int line = pa->pa_intrline;
#if NIOAPIC > 0 || NACPI > 0
int rawpin = pa->pa_rawintrpin;
pci_chipset_tag_t pc = pa->pa_pc;
int bus, dev, func;
#endif
if (pin == 0) {
/* No IRQ used. */
goto bad;
}
*ihp = 0;
if (pin > PCI_INTERRUPT_PIN_MAX) {
printf("pci_intr_map: bad interrupt pin %d\n", pin);
goto bad;
}
#if NIOAPIC > 0 || NACPI > 0
pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func);
if (mp_busses != NULL) {
if (intr_find_mpmapping(bus, (dev<<2)|(rawpin-1), ihp) == 0) {
if ((*ihp & 0xff) == 0)
*ihp |= line;
return 0;
}
/*
* No explicit PCI mapping found. This is not fatal,
* we'll try the ISA (or possibly EISA) mappings next.
*/
}
#endif
/*
* Section 6.2.4, `Miscellaneous Functions', says that 255 means
* `unknown' or `no connection' on a PC. We assume that a device with
* `no connection' either doesn't have an interrupt (in which case the
* pin number should be 0, and would have been noticed above), or
* wasn't configured by the BIOS (in which case we punt, since there's
* no real way we can know how the interrupt lines are mapped in the
* hardware).
*
* XXX
* Since IRQ 0 is only used by the clock, and we can't actually be sure
* that the BIOS did its job, we also recognize that as meaning that
* the BIOS has not configured the device.
*/
if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) {
printf("pci_intr_map: no mapping for pin %c (line=%02x)\n",
'@' + pin, line);
goto bad;
} else {
if (line >= NUM_LEGACY_IRQS) {
printf("pci_intr_map: bad interrupt line %d\n", line);
goto bad;
}
if (line == 2) {
printf("pci_intr_map: changed line 2 to line 9\n");
line = 9;
}
}
#if NIOAPIC > 0 || NACPI > 0
if (mp_busses != NULL) {
if (intr_find_mpmapping(mp_isa_bus, line, ihp) == 0) {
if ((*ihp & 0xff) == 0)
*ihp |= line;
return 0;
}
#if NEISA > 0
if (intr_find_mpmapping(mp_eisa_bus, line, ihp) == 0) {
if ((*ihp & 0xff) == 0)
*ihp |= line;
return 0;
}
#endif
printf("pci_intr_map: bus %d dev %d func %d pin %d; line %d\n",
bus, dev, func, pin, line);
printf("pci_intr_map: no MP mapping found\n");
}
#endif
*ihp = line;
return 0;
bad:
*ihp = -1;
return 1;
}
const char *
pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih)
{
return intr_string(ih & ~MPSAFE_MASK);
}
const struct evcnt *
pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
int
pci_intr_setattr(pci_chipset_tag_t pc, pci_intr_handle_t *ih,
int attr, uint64_t data)
{
switch (attr) {
case PCI_INTR_MPSAFE:
if (data) {
*ih |= MPSAFE_MASK;
} else {
*ih &= ~MPSAFE_MASK;
}
/* XXX Set live if already mapped. */
return 0;
default:
return ENODEV;
}
}
void *
pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih,
int level, int (*func)(void *), void *arg)
{
int pin, irq;
struct pic *pic;
#if NIOAPIC > 0
struct ioapic_softc *ioapic;
#endif
bool mpsafe;
pic = &i8259_pic;
pin = irq = (ih & ~MPSAFE_MASK);
mpsafe = ((ih & MPSAFE_MASK) != 0);
#if NIOAPIC > 0
if (ih & APIC_INT_VIA_APIC) {
ioapic = ioapic_find(APIC_IRQ_APIC(ih));
if (ioapic == NULL) {
printf("pci_intr_establish: bad ioapic %d\n",
APIC_IRQ_APIC(ih));
return NULL;
}
pic = &ioapic->sc_pic;
pin = APIC_IRQ_PIN(ih);
irq = APIC_IRQ_LEGACY_IRQ(ih);
if (irq < 0 || irq >= NUM_LEGACY_IRQS)
irq = -1;
}
#endif
return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg,
mpsafe);
}
void
pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie)
{
intr_disestablish(cookie);
}