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linux-2.6/arch/arm/mach-ixp4xx
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Mikael Pettersson dee2b904a1 IXP4xx: Fix IO_SPACE_LIMIT for 2.6.31-rc core PCI changes 
2.6.31-rc kernels don't boot on my ixp4xx box (ds101), because the libata
driver doesn't find the PCI IDE controller any more. 2.6.30 was fine.
I traced this to a PCI update (1f82de10d6)
in 2.6.30-git19. Diffing the kernel boot logs from 2.6.30-git18 and
2.6.30-git19 illustrates the breakage:

> --- dmesg-2.6.30-git18	2009-08-04 01:45:22.000000000 +0200
> +++ dmesg-2.6.30-git19	2009-08-04 01:45:46.000000000 +0200
> @@ -26,6 +26,13 @@
>  pci 0000:00:02.2: PME# supported from D0 D1 D2 D3hot
>  pci 0000:00:02.2: PME# disabled
>  PCI: bus0: Fast back to back transfers disabled
> +pci 0000:00:01.0: BAR 0: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 1: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 2: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 3: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:01.0: BAR 4: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:02.0: BAR 4: can't allocate I/O resource [0x10000-0xffff]
> +pci 0000:00:02.1: BAR 4: can't allocate I/O resource [0x10000-0xffff]
>  bio: create slab <bio-0> at 0
>  SCSI subsystem initialized
>  NET: Registered protocol family 2
> @@ -44,11 +51,7 @@
>  console [ttyS0] enabled
>  serial8250.0: ttyS1 at MMIO 0xc8001000 (irq = 13) is a XScale
>  Driver 'sd' needs updating - please use bus_type methods
> -PCI: enabling device 0000:00:01.0 (0140 -> 0141)
> -scsi0 : pata_artop
> -scsi1 : pata_artop
> -ata1: PATA max UDMA/100 cmd 0x1050 ctl 0x1060 bmdma 0x1040 irq 28
> -ata2: PATA max UDMA/100 cmd 0x1058 ctl 0x1064 bmdma 0x1048 irq 28
> +pata_artop 0000:00:01.0: no available native port
>  Using configured DiskOnChip probe address 0x50000000
>  DiskOnChip found at 0x50000000
>  NAND device: Manufacturer ID: 0x98, Chip ID: 0x73 (Toshiba NAND 16MiB 3,3V 8-bit)

The specific change in 1f82de10d6 responsible
for this failure turned out to be the following:

> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -193,7 +193,7 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
>  		res->flags |= pci_calc_resource_flags(l) | IORESOURCE_SIZEALIGN;
>  		if (type == pci_bar_io) {
>  			l &= PCI_BASE_ADDRESS_IO_MASK;
> -			mask = PCI_BASE_ADDRESS_IO_MASK & 0xffff;
> +			mask = PCI_BASE_ADDRESS_IO_MASK & IO_SPACE_LIMIT;
>  		} else {
>  			l &= PCI_BASE_ADDRESS_MEM_MASK;
>  			mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;

Every arch except arm's ixp4xx defines IO_SPACE_LIMIT as an all-bits-one
bitmask, typically -1UL but sometimes only a 16-bit 0x0000ffff. But ixp4xx
defines it as 0xffff0000, which is now causing the PCI failures.

Russell King noted that ixp4xx has 64KB PCI IO space, so IO_SPACE_LIMIT
should be 0x0000ffff. This patch makes that change, which fixes the PCI
failures on my ixp4xx box.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
2009-08-11 19:22:20 +02:00
..
include/mach IXP4xx: Fix IO_SPACE_LIMIT for 2.6.31-rc core PCI changes 2009-08-11 19:22:20 +02:00
avila-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
avila-setup.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
common-pci.c IXP4xx: PCI ixp4xx_scan_bus() is __devinit. 2009-03-17 15:01:53 +01:00
common.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
coyote-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
coyote-setup.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
dsmg600-pci.c [ARM] 5179/1: Replace obsolete IRQT_* and __IRQT_* values with IRQ_TYPE_* 2008-07-27 09:46:18 +01:00
dsmg600-setup.c i2c: Convert most new-style drivers to use module aliasing 2008-04-29 23:11:40 +02:00
fsg-pci.c [ARM] 5179/1: Replace obsolete IRQT_* and __IRQT_* values with IRQ_TYPE_* 2008-07-27 09:46:18 +01:00
fsg-setup.c net: convert print_mac to %pM 2008-10-27 17:06:18 -07:00
gateway7001-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
gateway7001-setup.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
goramo_mlr.c IXP4xx: support for Goramo MultiLink router platform. 2009-05-23 23:58:30 +02:00
gtwx5715-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
gtwx5715-setup.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
ixdp425-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
ixdp425-setup.c [ARM] Convert asm/delay.h to linux/delay.h 2008-09-06 12:11:37 +01:00
ixdpg425-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
ixp4xx_npe.c IXP42x: add NPE support for IXP425 rev. A0 processors. 2009-05-23 23:16:23 +02:00
ixp4xx_qmgr.c IXP42x: Use __fls() in QMgr interrupt handlers. 2009-05-23 23:37:04 +02:00
Kconfig IXP4xx: support for Goramo MultiLink router platform. 2009-05-23 23:58:30 +02:00
Makefile IXP4xx: support for Goramo MultiLink router platform. 2009-05-23 23:58:30 +02:00
Makefile.boot
nas100d-pci.c [ARM] 5179/1: Replace obsolete IRQT_* and __IRQT_* values with IRQ_TYPE_* 2008-07-27 09:46:18 +01:00
nas100d-setup.c net: convert print_mac to %pM 2008-10-27 17:06:18 -07:00
nslu2-pci.c [ARM] 5179/1: Replace obsolete IRQT_* and __IRQT_* values with IRQ_TYPE_* 2008-07-27 09:46:18 +01:00
nslu2-setup.c net: convert print_mac to %pM 2008-10-27 17:06:18 -07:00
wg302v2-pci.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
wg302v2-setup.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00