Messages in this thread | | | Date | Wed, 27 May 2015 10:47:02 +0100 | From | Liviu Dudau <> | Subject | Re: [PATCH 01/11] ARM64 / PCI: introduce struct pci_controller for ACPI |
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On Tue, May 26, 2015 at 06:20:40PM +0100, Jiang Liu wrote: > On 2015/5/27 0:58, Liviu Dudau wrote: > > On Tue, May 26, 2015 at 01:49:14PM +0100, Hanjun Guo wrote: > >> ARM64 ACPI based PCI host bridge init needs a arch dependent > >> struct pci_controller to accommodate common PCI host bridge > >> code which is introduced later, or it will lead to compile > >> errors on ARM64. > > > > Hi Hanjun, > > > > Two questions: why don't you introduce this patch next to the > > one that is going to make use of it (or even merge it there)? > > Second, why is the whole struct pci_controller not surrounded > > by #ifdef CONFIG_ACPI as you are implying that this is needed > > only for ACPI? > > > > Btw, looking through the whole series I'm not (yet) convinced > > that this is needed at all. > Hi Liviu, > This structure is required by the requested patch set > at http://patchwork.ozlabs.org/patch/472249/, which consolidates > the common code to support PCI host bridge into ACPI core. > Thanks! > Gerry
Hi Jiang,
Thanks for pointing me on the right answer, I've missed that series! Probably not the best place to comment on that series here, but I wonder why did you not made the pci_controller structure available in a more generic header file that can be included so that arches don't have to redefine the structure every time. After all, you are trying to consolidate things.
Oh, and pci_controller name throws a lot of false negatives, maybe a more specific one (acpi_pci_controller?) would make things clear?
Best regards, Liviu
> > > > > Best regards, > > Liviu > > > >> > >> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> > >> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> > >> CC: Arnd Bergmann <arnd@arndb.de> > >> CC: Catalin Marinas <catalin.marinas@arm.com> > >> CC: Liviu Dudau <Liviu.Dudau@arm.com> > >> CC: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com> > >> CC: Will Deacon <will.deacon@arm.com> > >> --- > >> arch/arm64/include/asm/pci.h | 10 ++++++++++ > >> 1 file changed, 10 insertions(+) > >> > >> diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h > >> index b008a72..7088495 100644 > >> --- a/arch/arm64/include/asm/pci.h > >> +++ b/arch/arm64/include/asm/pci.h > >> @@ -10,6 +10,16 @@ > >> #include <asm-generic/pci-bridge.h> > >> #include <asm-generic/pci-dma-compat.h> > >> > >> +struct acpi_device; > >> + > >> +struct pci_controller { > >> +#ifdef CONFIG_ACPI > >> + struct acpi_device *companion; /* ACPI companion device */ > >> +#endif > >> + int segment; /* PCI domain */ > >> + int node; /* NUMA node */ > >> +}; > >> + > >> #define PCIBIOS_MIN_IO 0x1000 > >> #define PCIBIOS_MIN_MEM 0 > >> > >> -- > >> 1.9.1 > >> > > >
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