1b03f1bca7
single bus_space_* framework. Unfortunately, bus_space_{read,write}_*
operations still imply barriers. That will change soon.
369 lines
8.4 KiB
C
369 lines
8.4 KiB
C
/* $NetBSD: pci_kn20aa.c,v 1.19 1996/10/23 04:12:28 cgd Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chris G. Demetriou
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and
|
|
* its documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
|
|
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie the
|
|
* rights to redistribute these changes.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/device.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#include <vm/vm.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
|
|
#include <dev/pci/pcireg.h>
|
|
#include <dev/pci/pcivar.h>
|
|
|
|
#include <alpha/pci/ciareg.h>
|
|
#include <alpha/pci/ciavar.h>
|
|
|
|
#include <alpha/pci/pci_kn20aa.h>
|
|
|
|
#ifndef EVCNT_COUNTERS
|
|
#include <machine/intrcnt.h>
|
|
#endif
|
|
|
|
#include "sio.h"
|
|
#if NSIO
|
|
#include <alpha/pci/siovar.h>
|
|
#endif
|
|
|
|
int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int,
|
|
pci_intr_handle_t *));
|
|
const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t));
|
|
void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t,
|
|
int, int (*func)(void *), void *));
|
|
void dec_kn20aa_intr_disestablish __P((void *, void *));
|
|
|
|
#define KN20AA_PCEB_IRQ 31
|
|
#define KN20AA_MAX_IRQ 32
|
|
#define PCI_STRAY_MAX 5
|
|
|
|
struct kn20aa_intrhand {
|
|
TAILQ_ENTRY(kn20aa_intrhand) ih_q;
|
|
int (*ih_fun)();
|
|
void *ih_arg;
|
|
u_long ih_count;
|
|
int ih_level;
|
|
};
|
|
TAILQ_HEAD(kn20aa_intrchain, kn20aa_intrhand);
|
|
|
|
struct kn20aa_intrchain kn20aa_pci_intrs[KN20AA_MAX_IRQ];
|
|
int kn20aa_pci_strayintrcnt[KN20AA_MAX_IRQ];
|
|
#ifdef EVCNT_COUNTERS
|
|
struct evcnt kn20aa_intr_evcnt;
|
|
#endif
|
|
|
|
void kn20aa_pci_strayintr __P((int irq));
|
|
void kn20aa_iointr __P((void *framep, unsigned long vec));
|
|
void kn20aa_enable_intr __P((int irq));
|
|
void kn20aa_disable_intr __P((int irq));
|
|
struct kn20aa_intrhand *kn20aa_attach_intr __P((struct kn20aa_intrchain *,
|
|
int, int (*) (void *), void *));
|
|
|
|
void
|
|
pci_kn20aa_pickintr(ccp)
|
|
struct cia_config *ccp;
|
|
{
|
|
int i;
|
|
struct kn20aa_intrhand *nintrhand;
|
|
bus_space_tag_t iot = ccp->cc_iot;
|
|
pci_chipset_tag_t pc = &ccp->cc_pc;
|
|
|
|
for (i = 0; i < KN20AA_MAX_IRQ; i++)
|
|
TAILQ_INIT(&kn20aa_pci_intrs[i]);
|
|
|
|
pc->pc_intr_v = ccp;
|
|
pc->pc_intr_map = dec_kn20aa_intr_map;
|
|
pc->pc_intr_string = dec_kn20aa_intr_string;
|
|
pc->pc_intr_establish = dec_kn20aa_intr_establish;
|
|
pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish;
|
|
|
|
#if NSIO
|
|
sio_intr_setup(iot);
|
|
#endif
|
|
|
|
set_iointr(kn20aa_iointr);
|
|
|
|
#if NSIO
|
|
kn20aa_enable_intr(KN20AA_PCEB_IRQ);
|
|
#if 0 /* XXX init PCEB interrupt handler? */
|
|
kn20aa_attach_intr(&kn20aa_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
int
|
|
dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp)
|
|
void *ccv;
|
|
pcitag_t bustag;
|
|
int buspin, line;
|
|
pci_intr_handle_t *ihp;
|
|
{
|
|
struct cia_config *ccp = ccv;
|
|
pci_chipset_tag_t pc = &ccp->cc_pc;
|
|
int device;
|
|
int kn20aa_irq;
|
|
void *ih;
|
|
|
|
if (buspin == 0) {
|
|
/* No IRQ used. */
|
|
return 1;
|
|
}
|
|
if (buspin > 4) {
|
|
printf("pci_map_int: bad interrupt pin %d\n", buspin);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Slot->interrupt translation. Appears to work, though it
|
|
* may not hold up forever.
|
|
*
|
|
* The DEC engineers who did this hardware obviously engaged
|
|
* in random drug testing.
|
|
*/
|
|
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
|
|
switch (device) {
|
|
case 11:
|
|
case 12:
|
|
kn20aa_irq = ((device - 11) + 0) * 4;
|
|
break;
|
|
|
|
case 7:
|
|
kn20aa_irq = 8;
|
|
break;
|
|
|
|
case 9:
|
|
kn20aa_irq = 12;
|
|
break;
|
|
|
|
case 6: /* 21040 on AlphaStation 500 */
|
|
kn20aa_irq = 13;
|
|
break;
|
|
|
|
case 8:
|
|
kn20aa_irq = 16;
|
|
break;
|
|
|
|
default:
|
|
#ifdef KN20AA_BOGUS_IRQ_FROB
|
|
*ihp = 0xdeadbeef;
|
|
printf("\n\n BOGUS INTERRUPT MAPPING: dev %d, pin %d\n",
|
|
device, buspin);
|
|
return (0);
|
|
#endif
|
|
panic("pci_kn20aa_map_int: invalid device number %d\n",
|
|
device);
|
|
}
|
|
|
|
kn20aa_irq += buspin - 1;
|
|
if (kn20aa_irq > KN20AA_MAX_IRQ)
|
|
panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n",
|
|
kn20aa_irq);
|
|
|
|
*ihp = kn20aa_irq;
|
|
return (0);
|
|
}
|
|
|
|
const char *
|
|
dec_kn20aa_intr_string(ccv, ih)
|
|
void *ccv;
|
|
pci_intr_handle_t ih;
|
|
{
|
|
struct cia_config *ccp = ccv;
|
|
static char irqstr[15]; /* 11 + 2 + NULL + sanity */
|
|
|
|
#ifdef KN20AA_BOGUS_IRQ_FROB
|
|
if (ih == 0xdeadbeef) {
|
|
sprintf(irqstr, "BOGUS");
|
|
return (irqstr);
|
|
}
|
|
#endif
|
|
if (ih > KN20AA_MAX_IRQ)
|
|
panic("dec_kn20aa_a50_intr_string: bogus kn20aa IRQ 0x%x\n",
|
|
ih);
|
|
|
|
sprintf(irqstr, "kn20aa irq %d", ih);
|
|
return (irqstr);
|
|
}
|
|
|
|
void *
|
|
dec_kn20aa_intr_establish(ccv, ih, level, func, arg)
|
|
void *ccv, *arg;
|
|
pci_intr_handle_t ih;
|
|
int level;
|
|
int (*func) __P((void *));
|
|
{
|
|
struct cia_config *ccp = ccv;
|
|
void *cookie;
|
|
|
|
#ifdef KN20AA_BOGUS_IRQ_FROB
|
|
if (ih == 0xdeadbeef) {
|
|
int i;
|
|
char chars[10];
|
|
|
|
printf("dec_kn20aa_intr_establish: BOGUS IRQ\n");
|
|
do {
|
|
printf("IRQ to enable? ");
|
|
getstr(chars, 10);
|
|
i = atoi(chars);
|
|
} while (i < 0 || i > 32);
|
|
printf("ENABLING IRQ %d\n", i);
|
|
kn20aa_enable_intr(i);
|
|
return ((void *)0xbabefacedeadbeef);
|
|
}
|
|
#endif
|
|
if (ih > KN20AA_MAX_IRQ)
|
|
panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n",
|
|
ih);
|
|
|
|
cookie = kn20aa_attach_intr(&kn20aa_pci_intrs[ih], level, func, arg);
|
|
kn20aa_enable_intr(ih);
|
|
return (cookie);
|
|
}
|
|
|
|
void
|
|
dec_kn20aa_intr_disestablish(ccv, cookie)
|
|
void *ccv, *cookie;
|
|
{
|
|
struct cia_config *ccp = ccv;
|
|
|
|
panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */
|
|
}
|
|
|
|
/*
|
|
* caught a stray interrupt; notify if not too many seen already.
|
|
*/
|
|
void
|
|
kn20aa_pci_strayintr(irq)
|
|
int irq;
|
|
{
|
|
|
|
kn20aa_pci_strayintrcnt[irq]++;
|
|
if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
|
|
kn20aa_disable_intr(irq);
|
|
|
|
log(LOG_ERR, "stray kn20aa irq %d\n", irq);
|
|
if (kn20aa_pci_strayintrcnt[irq] == PCI_STRAY_MAX)
|
|
log(LOG_ERR, "disabling interrupts on kn20aa irq %d\n", irq);
|
|
}
|
|
|
|
void
|
|
kn20aa_iointr(framep, vec)
|
|
void *framep;
|
|
unsigned long vec;
|
|
{
|
|
struct kn20aa_intrhand *ih;
|
|
int irq, handled;
|
|
|
|
if (vec >= 0x900) {
|
|
if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4))
|
|
panic("kn20aa_iointr: vec 0x%x out of range\n", vec);
|
|
irq = (vec - 0x900) >> 4;
|
|
|
|
#ifdef EVCNT_COUNTERS
|
|
kn20aa_intr_evcnt.ev_count++;
|
|
#else
|
|
if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN)
|
|
panic("kn20aa interrupt counter sizes inconsistent");
|
|
intrcnt[INTRCNT_KN20AA_IRQ + irq]++;
|
|
#endif
|
|
|
|
for (ih = kn20aa_pci_intrs[irq].tqh_first, handled = 0;
|
|
ih != NULL; ih = ih->ih_q.tqe_next) {
|
|
int rv;
|
|
|
|
rv = (*ih->ih_fun)(ih->ih_arg);
|
|
|
|
ih->ih_count++;
|
|
handled = handled || (rv != 0);
|
|
}
|
|
if (!handled)
|
|
kn20aa_pci_strayintr(irq);
|
|
return;
|
|
}
|
|
if (vec >= 0x800) {
|
|
#if NSIO
|
|
sio_iointr(framep, vec);
|
|
#endif
|
|
return;
|
|
}
|
|
panic("kn20aa_iointr: weird vec 0x%x\n", vec);
|
|
}
|
|
|
|
void
|
|
kn20aa_enable_intr(irq)
|
|
int irq;
|
|
{
|
|
|
|
/*
|
|
* From disassembling small bits of the OSF/1 kernel:
|
|
* the following appears to enable a given interrupt request.
|
|
* "blech." I'd give valuable body parts for better docs or
|
|
* for a good decompiler.
|
|
*/
|
|
alpha_mb();
|
|
REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */
|
|
alpha_mb();
|
|
}
|
|
|
|
void
|
|
kn20aa_disable_intr(irq)
|
|
int irq;
|
|
{
|
|
|
|
alpha_mb();
|
|
REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */
|
|
alpha_mb();
|
|
}
|
|
|
|
struct kn20aa_intrhand *
|
|
kn20aa_attach_intr(chain, level, func, arg)
|
|
struct kn20aa_intrchain *chain;
|
|
int level;
|
|
int (*func) __P((void *));
|
|
void *arg;
|
|
{
|
|
struct kn20aa_intrhand *nintrhand;
|
|
|
|
nintrhand = (struct kn20aa_intrhand *)
|
|
malloc(sizeof *nintrhand, M_DEVBUF, M_WAITOK);
|
|
|
|
nintrhand->ih_fun = func;
|
|
nintrhand->ih_arg = arg;
|
|
nintrhand->ih_count = 0;
|
|
nintrhand->ih_level = level;
|
|
TAILQ_INSERT_TAIL(chain, nintrhand, ih_q);
|
|
|
|
return (nintrhand);
|
|
}
|