Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pretty much redo interrupt code- now handles shared interrupts and solves the buspin int problem

This commit is contained in:
mjacob 1998-04-30 04:31:19 +00:00
parent e3904356a4
commit de4d1c62af
1 changed files with 86 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

210
sys/arch/alpha/pci/pci_kn300.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pci_kn300.c,v 1.5 1998/04/25 00:12:45 thorpej Exp $ */
/* $NetBSD: pci_kn300.c,v 1.6 1998/04/30 04:31:19 mjacob Exp $ */
/*
* Copyright (c) 1998 by Matthew Jacob
@ -32,7 +32,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.5 1998/04/25 00:12:45 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.6 1998/04/30 04:31:19 mjacob Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -73,21 +73,22 @@ void * dec_kn300_intr_establish __P((void *, pci_intr_handle_t,
void dec_kn300_intr_disestablish __P((void *, void *));
#define KN300_PCEB_IRQ 16
#define NPIN 4
#define NPIN 4
static struct vectab {
int (*func) __P((void *));
void *arg;
int irq;
} vectab[MAX_MC_BUS][MCPCIA_PER_MCBUS][MCPCIA_MAXSLOT][NPIN];
#define NVEC (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN)
static char savunit[NVEC];
static char savirqs[NVEC];
extern struct mcpcia_softc *mcpcias;
struct mcpcia_config *mcpcia_eisaccp = NULL;
static struct alpha_shared_intr *kn300_pci_intr;
#ifdef EVCNT_COUNTERS
struct evcnt kn300_intr_evcnt;
#endif
int kn300_spurious __P((void *));
static char * kn300_spurious __P((int));
void kn300_iointr __P((void *, unsigned long));
void kn300_enable_intr __P((struct mcpcia_config *, int));
void kn300_disable_intr __P((struct mcpcia_config *, int));
@ -101,25 +102,12 @@ pci_kn300_pickintr(ccp, first)
if (first) {
int g;
for (g = 0; g < MAX_MC_BUS; g++) {
int m;
for (m = 0; m < MCPCIA_PER_MCBUS; m++) {
int s;
for (s = 0; s < MCPCIA_MAXSLOT; s++) {
int p;
for (p = 0; p < NPIN; p++) {
struct vectab *vp;
vp = &vectab[g][m][s][p];
vp->func = kn300_spurious;
vp->arg = (void *) ((long)
(g << 0) |
(m << 3) |
(s << 6) |
(p << 9));
vp->irq = -1;
}
}
}
kn300_pci_intr = alpha_shared_intr_alloc(NVEC);
for (g = 0; g < NVEC; g++) {
alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25);
savunit[g] = (char) -1;
savirqs[g] = (char) -1;
}
set_iointr(kn300_iointr);
}
@ -190,17 +178,17 @@ dec_kn300_intr_map(ccv, bustag, buspin, line, ihp)
/*
* handle layout:
*
* bits 0..2 7-GID
* bits 3..5 MID-4
* bits 6..8 PCI Slot (0..7- yes, some don't exist)
* bits 9..10 buspin-1
* bits 0..1 buspin-1
* bits 2..4 PCI Slot (0..7- yes, some don't exist)
* bits 5..7 MID-4
* bits 8..10 7-GID
* bits 11-15 IRQ
*/
*ihp = (pci_intr_handle_t)
(7 - ccp->cc_sc->mcpcia_gid) |
((ccp->cc_sc->mcpcia_mid - 4) << 3) |
(device << 6) |
((buspin-1) << 9) |
(buspin - 1 ) |
((device & 0x7) << 2) |
((ccp->cc_sc->mcpcia_mid - 4) << 5) |
((7 - ccp->cc_sc->mcpcia_gid) << 8) |
(kn300_irq << 11);
return (0);
}
@ -212,7 +200,7 @@ dec_kn300_intr_string(ccv, ih)
{
static char irqstr[64];
sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c",
(ih >> 11) & 0x1f, ((ih >> 9) & 0x3) + 'A');
(ih >> 11) & 0x1f, (ih & 0x3) + 'A');
return (irqstr);
}
@ -224,41 +212,20 @@ dec_kn300_intr_establish(ccv, ih, level, func, arg)
int (*func) __P((void *));
void *arg;
{
struct vectab *vp;
int gidx, midx, slot, pidx, s;
void *cookie = NULL;
void *cookie;
int v;
gidx = ih & 0x7;
midx = (ih >> 3) & 0x7;
slot = (ih >> 6) & 0x7;
pidx = (ih >> 9) & 0x3;
v = ih & 0x3ff;
cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL,
level, func, arg, "kn300 vector");
/*
* XXX: FIXME - for PCI bridges, the framework here is such that
* XXX: we're mapping the mapping for the bridge, not the
* XXX: device behind the bridge, so we're not cognizant of the
* XXX: pin swizzling that could go on. We really ought to fix
* XXX: this, but for a first cut, assuming all pins map to the
* XXX: same device and filling in all pin vectors is probably
* XXX: okay.
*/
for (pidx = 0; pidx < 4; pidx++) {
vp = &vectab[gidx][midx][slot][pidx];
if (vp->func != kn300_spurious) {
printf("dec_kn300_intr_establish: vector cookie 0x%x "
"already used\n", ih);
return (cookie);
}
s = splhigh();
vp->func = func;
vp->arg = arg;
vp->irq = (ih >> 11) & 0x1f;
(void) splx(s);
if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) {
struct mcpcia_config *ccp = ccv;
savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit;
savirqs[v] = (ih >> 11) & 0x1f;
kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f));
alpha_mb();
}
kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f));
cookie = (void *) ih;
return (cookie);
}
@ -266,44 +233,23 @@ void
dec_kn300_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
pci_intr_handle_t ih = (pci_intr_handle_t) cookie;
int gidx, midx, slot, pidx, s;
struct vectab *vp;
gidx = ih & 0x7;
midx = (ih >> 3) & 0x7;
slot = (ih >> 6) & 0x7;
pidx = (ih >> 9) & 0x3;
vp = &vectab[gidx][midx][slot][pidx];
s = splhigh();
vp->func = kn300_spurious;
vp->arg = cookie;
vp->irq = -1;
(void) splx(s);
kn300_disable_intr(ccv, (int)((ih >> 11) & 0x1f));
panic("dec_kn300_intr_disestablish not implemented");
}
int
kn300_spurious(arg)
void *arg;
static char *
kn300_spurious(ih)
int ih;
{
pci_intr_handle_t ih = (pci_intr_handle_t) arg;
int gidx, midx, slot, pidx;
static char str[48];
int pidx, slot, midx, gidx;
gidx = ih & 0x7;
midx = (ih >> 3) & 0x7;
slot = (ih >> 6) & 0x7;
pidx = (ih >> 9) & 0x3;
printf("Spurious Interrupt from mcbus%d MID %d Slot %d "
"PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A');
/*
* XXX: We *could*, if we have recorded all the mcpcia softcs
* XXX: that we've configured, and this spurious interrupt
* XXX: falls within this range, disable this interrupt.
*
* XXX: Later.
*/
return (-1);
pidx = ih & 0x3;
slot = (ih >> 2) & 0x7;
midx = (ih >> 5) & 0x7;
gidx = (ih >> 8) & 0x7;
sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq",
gidx, midx + 4, slot, pidx + 'A');
return (str);
}
void
@ -311,8 +257,8 @@ kn300_iointr(framep, vec)
void *framep;
unsigned long vec;
{
int base, gidx, midx, slot, pidx;
struct vectab *vp;
struct mcpcia_softc *mcp;
int v, gidx, midx;
if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) {
#if NSIO
@ -325,20 +271,13 @@ kn300_iointr(framep, vec)
#endif
}
base = (int) vec - MCPCIA_VEC_PCI;
v = (int) vec - MCPCIA_VEC_PCI;
midx = base / 0x200;
midx = v / 0x200;
gidx = midx / 4;
midx = midx % 4;
slot = (base % 0x200) / 0x10;
pidx = ((slot / 4) & 0x3);
slot = slot / 4;
if (gidx >= MAX_MC_BUS || midx >= MCPCIA_PER_MCBUS ||
slot >= MCPCIA_MAXSLOT || pidx >= NPIN) {
panic("kn300_iointr: vec 0x%x (mcbus%d mid%d slot %d pin%d)",
vec, gidx, midx+4, slot, pidx);
}
#ifdef EVCNT_COUNTERS
kn300_intr_evcnt.ev_count++;
@ -361,20 +300,43 @@ kn300_iointr(framep, vec)
return;
}
/*
* Now, for the main stuff...
* Convert vector offset into a dense number.
*/
vp = &vectab[gidx][midx][slot][pidx];
v /= 0x10;
#ifndef EVCNT_COUNTERS
if (vp->irq >= 0 && vp->irq <= INTRCNT_KN300_NCR810) {
intrcnt[INTRCNT_KN300_IRQ + vp->irq]++;
if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) {
intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++;
}
#endif
if ((*vp->func)(vp->arg) == 0) {
#if 0
printf("Unclaimed interrupt from mcbus%d MID %d Slot %d "
"PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A');
#endif
if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) {
return;
}
/*
* Nobody fielded the interrupt?
*/
alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v));
if (kn300_pci_intr[v].intr_nstrays <
kn300_pci_intr[v].intr_maxstrays) {
return;
}
/*
* Search for the controlling mcpcia.
*/
for (mcp = mcpcias; mcp != NULL; mcp = mcp->mcpcia_next) {
if (mcp->mcpcia_dev.dv_unit == savunit[v]) {
break;
}
}
/*
* And if found, disable this IRQ level. Guess what?
* This may kill other things too.
*/
if (mcp) {
kn300_disable_intr(&mcp->mcpcia_cc, savirqs[v]);
}
}