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Add hw.pci.irq_override_mask, which is a mask of interrupts that are

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considered to be good to try when it otherwise has no clue about which
interrupts to try.  This is a band-aide and we really should try to
balance the IRQs that we arbitrarily pick, but it should help some
people that would otherwise get bad IRQs.
This commit is contained in:
Warner Losh 2003-08-01 21:31:36 +00:00
parent 20332394f8
commit e86bd39aab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=118325
2 changed files with 28 additions and 0 deletions
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14
sys/i386/pci/pci_cfgreg.c
View file

@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
@ -78,6 +79,17 @@ static int pci_route_count;
static struct mtx pcicfg_mtx;
/* sysctl vars */
SYSCTL_DECL(_hw_pci);
static uint32_t pci_irq_override_mask = 0xdef4;
TUNABLE_INT("hw.pci.irq_override_mask", &pci_irq_override_mask);
SYSCTL_INT(_hw_pci, OID_AUTO, irq_override_mask, CTLFLAG_RD,
&pci_irq_override_mask, 0xdef4,
"Mask of allowed irqs to try to route when it has no good clue about\n"
"which irqs it should use.");
/*
* Some BIOS writers seem to want to ignore the spec and put
* 0 in the intline rather than 255 to indicate none. Some use
@ -515,6 +527,8 @@ pci_cfgintr_virgin(struct PIR_entry *pe, int pin)
/* life is tough, so just pick an interrupt */
for (irq = 0; irq < 16; irq++) {
ibit = (1 << irq);
if ((ibit & pci_irq_override_mask) == 0)
continue;
if (pe->pe_intpin[pin - 1].irqs & ibit) {
PRVERB(("pci_cfgintr_virgin: using routable interrupt %d\n", irq));
return(irq);

14
sys/i386/pci/pci_pir.c
View file

@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
@ -78,6 +79,17 @@ static int pci_route_count;
static struct mtx pcicfg_mtx;
/* sysctl vars */
SYSCTL_DECL(_hw_pci);
static uint32_t pci_irq_override_mask = 0xdef4;
TUNABLE_INT("hw.pci.irq_override_mask", &pci_irq_override_mask);
SYSCTL_INT(_hw_pci, OID_AUTO, irq_override_mask, CTLFLAG_RD,
&pci_irq_override_mask, 0xdef4,
"Mask of allowed irqs to try to route when it has no good clue about\n"
"which irqs it should use.");
/*
* Some BIOS writers seem to want to ignore the spec and put
* 0 in the intline rather than 255 to indicate none. Some use
@ -515,6 +527,8 @@ pci_cfgintr_virgin(struct PIR_entry *pe, int pin)
/* life is tough, so just pick an interrupt */
for (irq = 0; irq < 16; irq++) {
ibit = (1 << irq);
if ((ibit & pci_irq_override_mask) == 0)
continue;
if (pe->pe_intpin[pin - 1].irqs & ibit) {
PRVERB(("pci_cfgintr_virgin: using routable interrupt %d\n", irq));
return(irq);