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Kirill Smelkov
linux
Commits
455db04b
Commit
455db04b
authored
Mar 10, 2002
by
David S. Miller
Browse files
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Fix PCI IRQ probing for some bridging situations.
Use PCI_SLOT instead of hard-coded shift.
parent
31feabb8
Changes
1
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1 changed file
with
77 additions
and
39 deletions
+77
-39
arch/sparc64/kernel/pci_common.c
arch/sparc64/kernel/pci_common.c
+77
-39
No files found.
arch/sparc64/kernel/pci_common.c
View file @
455db04b
...
...
@@ -583,21 +583,45 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
/* If we are underneath a PCI bridge, use PROM register
* property of the parent bridge which is closest to
* the PBM.
*
* However if that parent bridge has interrupt map/mask
* properties of it's own we use the PROM register property
* of the next child device on the path to PDEV.
*
* In detail the two cases are (note that the 'X' below is the
* 'next child on the path to PDEV' mentioned above):
*
* 1) PBM --> PCI bus lacking int{map,mask} --> X ... PDEV
*
* Here we use regs of 'PCI bus' device.
*
* 2) PBM --> PCI bus with int{map,mask} --> X ... PDEV
*
* Here we use regs of 'X'. Note that X can be PDEV.
*/
if
(
pdev
->
bus
->
number
!=
pbm
->
pci_first_busno
)
{
struct
pcidev_cookie
*
bus_pcp
;
struct
pci_dev
*
pwalk
;
int
offset
,
plen
;
struct
pcidev_cookie
*
bus_pcp
,
*
regs_pcp
;
struct
pci_dev
*
bus_dev
,
*
regs_dev
;
int
plen
;
bus_dev
=
pdev
->
bus
->
self
;
regs_dev
=
pdev
;
pwalk
=
pdev
->
bus
->
self
;
while
(
pwalk
->
bus
&&
pwalk
->
bus
->
number
!=
pbm
->
pci_first_busno
)
pwalk
=
pwalk
->
bus
->
self
;
while
(
bus_dev
->
bus
&&
bus_dev
->
bus
->
number
!=
pbm
->
pci_first_busno
)
{
regs_dev
=
bus_dev
;
bus_dev
=
bus_dev
->
bus
->
self
;
}
regs_pcp
=
regs_dev
->
sysdata
;
pregs
=
regs_pcp
->
prom_regs
;
bus_pcp
=
pwalk
->
sysdata
;
bus_pcp
=
bus_dev
->
sysdata
;
/* But if the PCI bridge has it's own interrupt map
* and mask properties, use that and the device regs.
* and mask properties, use that and the regs of the
* PCI entity at the next level down on the path to the
* device.
*/
plen
=
prom_getproperty
(
bus_pcp
->
prom_node
,
"interrupt-map"
,
(
char
*
)
&
bridge_local_intmap
[
0
],
...
...
@@ -605,38 +629,21 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
if
(
plen
!=
-
1
)
{
intmap
=
&
bridge_local_intmap
[
0
];
num_intmap
=
plen
/
sizeof
(
struct
linux_prom_pci_intmap
);
plen
=
prom_getproperty
(
bus_pcp
->
prom_node
,
"interrupt-map-mask"
,
plen
=
prom_getproperty
(
bus_pcp
->
prom_node
,
"interrupt-map-mask"
,
(
char
*
)
&
bridge_local_intmask
,
sizeof
(
bridge_local_intmask
));
if
(
plen
==
-
1
)
{
prom_printf
(
"pbm_intmap_match: Bridge has intmap but "
"no intmask.
\n
"
);
prom_halt
();
printk
(
"pci_intmap_match: Warning! Bridge has intmap "
"but no intmask.
\n
"
);
printk
(
"pci_intmap_match: Trying to recover.
\n
"
);
return
0
;
}
goto
check_intmap
;
}
pregs
=
bus_pcp
->
prom_regs
;
offset
=
prom_getint
(
dev_pcp
->
prom_node
,
"fcode-rom-offset"
);
/* Did PROM know better and assign an interrupt other
* than #INTA to the device? - We test here for presence of
* FCODE on the card, in this case we assume PROM has set
* correct 'interrupts' property, unless it is quadhme.
*/
if
(
offset
==
-
1
||
!
strcmp
(
dev_pcp
->
prom_name
,
"SUNW,qfe"
)
||
!
strcmp
(
dev_pcp
->
prom_name
,
"qfe"
))
{
/*
* No, use low slot number bits of child as IRQ line.
*/
*
interrupt
=
((
*
interrupt
-
1
+
PCI_SLOT
(
pdev
->
devfn
))
&
3
)
+
1
;
}
else
{
pregs
=
bus_pcp
->
prom_regs
;
}
}
check_intmap:
hi
=
pregs
->
phys_hi
&
intmask
->
phys_hi
;
mid
=
pregs
->
phys_mid
&
intmask
->
phys_mid
;
lo
=
pregs
->
phys_lo
&
intmask
->
phys_lo
;
...
...
@@ -652,12 +659,22 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
}
}
prom_printf
(
"pbm_intmap_match: bus %02x, devfn %02x: "
,
/* Print it both to OBP console and kernel one so that if bootup
* hangs here the user has the information to report.
*/
prom_printf
(
"pci_intmap_match: bus %02x, devfn %02x: "
,
pdev
->
bus
->
number
,
pdev
->
devfn
);
prom_printf
(
"IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map
\n
"
,
pregs
->
phys_hi
,
pregs
->
phys_mid
,
pregs
->
phys_lo
,
*
interrupt
);
prom_printf
(
"Please email this information to davem@redhat.com
\n
"
);
prom_halt
();
printk
(
"pci_intmap_match: bus %02x, devfn %02x: "
,
pdev
->
bus
->
number
,
pdev
->
devfn
);
printk
(
"IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map
\n
"
,
pregs
->
phys_hi
,
pregs
->
phys_mid
,
pregs
->
phys_lo
,
*
interrupt
);
printk
(
"Please email this information to davem@redhat.com
\n
"
);
return
0
;
}
static
void
__init
pdev_fixup_irq
(
struct
pci_dev
*
pdev
)
...
...
@@ -703,6 +720,20 @@ static void __init pdev_fixup_irq(struct pci_dev *pdev)
goto
have_irq
;
}
/* Firmware gets quad-hme interrupts property totally
* wrong. It is 4 EBUS+HME devices behind a Digital bridge.
* For each of the 4 instances the EBUS has interrupt property
* '1' and the HME has interrupt property '2'. So we have to
* fix this up.
*/
if
(
!
strcmp
(
pcp
->
prom_name
,
"SUNW,qfe"
)
||
!
strcmp
(
pcp
->
prom_name
,
"qfe"
))
{
if
(
PCI_SLOT
(
pdev
->
devfn
)
&
~
3
)
BUG
();
prom_irq
=
PCI_SLOT
(
pdev
->
devfn
)
+
1
;
}
/* Can we find a matching entry in the interrupt-map? */
if
(
pci_intmap_match
(
pdev
,
&
prom_irq
))
{
pdev
->
irq
=
p
->
irq_build
(
pbm
,
pdev
,
(
portid
<<
6
)
|
prom_irq
);
...
...
@@ -738,12 +769,19 @@ static void __init pdev_fixup_irq(struct pci_dev *pdev)
* ranges. -DaveM
*/
if
(
pdev
->
bus
->
number
==
pbm
->
pci_first_busno
)
{
slot
=
(
pdev
->
devfn
>>
3
)
-
pbm
->
pci_first_slot
;
slot
=
PCI_SLOT
(
pdev
->
devfn
)
-
pbm
->
pci_first_slot
;
}
else
{
struct
pci_dev
*
bus_dev
;
/* Underneath a bridge, use slot number of parent
* bridge.
* bridge
which is closest to the PBM
.
*/
slot
=
(
pdev
->
bus
->
self
->
devfn
>>
3
)
-
pbm
->
pci_first_slot
;
bus_dev
=
pdev
->
bus
->
self
;
while
(
bus_dev
->
bus
&&
bus_dev
->
bus
->
number
!=
pbm
->
pci_first_busno
)
bus_dev
=
bus_dev
->
bus
->
self
;
slot
=
PCI_SLOT
(
bus_dev
->
devfn
)
-
pbm
->
pci_first_slot
;
}
slot
=
slot
<<
2
;
...
...
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