On Tue, May 05, 2015 at 03:02:12AM +0100, Jayachandran C wrote:
> The current code in pci-host-generic.c uses pci_common_init_dev()
> from the arch/arm/ to do a part of the PCI initialization, and this
> prevents it from being used on arm64.
>
> The initialization done by pci_common_init_dev() that is really
> needed by pci-host-generic.c can be done in the same file without
> using the hw_pci API of ARM.
>
> The ARM platform requires a pci_sys_data as sysdata for the PCI bus,
> this is be handled by setting up 'struct gen_pci' to embed a
> pci_sys_data variable as the first element on the ARM platform.
>
> Signed-off-by: Jayachandran C <jchandra@xxxxxxxxxxxx>
> ---
> Here's v2 of the patches, this enables use of pci-host-generic on
> arm64.
>
> This has been tested on both qemu and fast model for arm64, and on
> qemu for arm32.
>
> v1->v2
> - Address comments from Arnd Bergmann and Lorenzo Pieralisi
> - move contents of gen_pci_init to gen_pci_probe
> - assign resources only when !probe_only
> - tested on ARM32 with qemu option -M virt
I tried this with an arm64 kernel running under kvmtool, but I get the
following errors (a 32-bit ARM kernel does seem to work):
PCI host bridge /pci ranges:
IO 0x00000000..0x0000ffff -> 0x00000000
MEM 0x41000000..0x7fffffff -> 0x41000000
pci-host-generic 40000000.pci: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [bus 00-01]
pci_bus 0000:00: root bus resource [io 0x0000-0xffff]
pci_bus 0000:00: root bus resource [mem 0x41000000-0x7fffffff]
pci_bus 0000:00: scanning bus
pci 0000:00:00.0: [1af4:1009] type 00 class 0xff0000
pci 0000:00:00.0: reg 0x10: [mem 0x41000000-0x410003ff]
pci 0000:00:00.0: reg 0x14: [io 0x6200-0x65ff]
pci 0000:00:00.0: reg 0x18: [mem 0x41000400-0x410005ff]
pci 0000:00:01.0: [1af4:1009] type 00 class 0xff0000
pci 0000:00:01.0: reg 0x10: [mem 0x41000800-0x41000bff]
pci 0000:00:01.0: reg 0x14: [io 0x6600-0x69ff]
pci 0000:00:01.0: reg 0x18: [mem 0x41000c00-0x41000dff]
pci_bus 0000:00: fixups for bus
pci_bus 0000:00: bus scan returning with max=00
pci 0000:00:00.0: fixup irq: got 10
pci 0000:00:00.0: assigning IRQ 10
pci 0000:00:01.0: fixup irq: got 11
pci 0000:00:01.0: assigning IRQ 11
virtio-pci 0000:00:00.0: can't enable device: BAR 0 [mem 0x41000000-0x410003ff] not claimed
virtio-pci: probe of 0000:00:00.0 failed with error -22
virtio-pci 0000:00:01.0: can't enable device: BAR 0 [mem 0x41000800-0x41000bff] not claimed
virtio-pci: probe of 0000:00:01.0 failed with error -22
Will
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