linux-kernel - Re: [RFC PATCH 14/16] arm/PCI: Introduce pci_get_domain

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Message-ID: <20141117120839.GA22241@e102568-lin.cambridge.arm.com>
Date:	Mon, 17 Nov 2014 12:08:39 +0000
From:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"huxinwei@...wei.com" <huxinwei@...wei.com>,
	Wuyun <wuyun.wu@...wei.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	"x86@...nel.org" <x86@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	Tony Luck <tony.luck@...el.com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Liviu Dudau <liviu@...au.co.uk>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>
Subject: Re: [RFC PATCH 14/16] arm/PCI: Introduce pci_get_domain_nr()

On Mon, Nov 17, 2014 at 10:21:48AM +0000, Yijing Wang wrote:
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> ---
>  arch/arm/include/asm/mach/pci.h |    9 +++++++++
>  arch/arm/kernel/bios32.c        |    8 ++++++--
>  2 files changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
> index f19f627..370b3bd 100644
> --- a/arch/arm/include/asm/mach/pci.h
> +++ b/arch/arm/include/asm/mach/pci.h
> @@ -90,6 +90,15 @@ extern void pci_map_io_early(unsigned long pfn);
>  static inline void pci_map_io_early(unsigned long pfn) {}
>  #endif
>  
> +#ifdef CONFIG_PCI_DOMAINS_GENERIC
> +int pci_get_domain_nr(struct device *parent)
> +#else
> +static inline int pci_get_domain_nr(struct device *parent)
> +{
> +	return 0;
> +}
> +#endif
> +
>  /*
>   * PCI controllers
>   */
> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
> index d8c2b4e..3fe56f1 100644
> --- a/arch/arm/kernel/bios32.c
> +++ b/arch/arm/kernel/bios32.c
> @@ -513,7 +513,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
>  #ifdef CONFIG_PCI_DOMAINS_GENERIC
>  static bool dt_domain_found;
>  
> -void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
> +int pci_get_domain_nr(struct device *parent)
>  {
>  	int domain = of_get_pci_domain_nr(parent->of_node);
>  
> @@ -526,8 +526,12 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
>  	} else {
>  		domain = pci_get_new_domain_nr();
>  	}
> +	return domain;
> +}
>  
> -	bus->domain_nr = domain;
> +void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
> +{
> +	bus->domain_nr = pci_get_domain_nr(parent);
>  }
>  #endif

This code is superseded by the last patches I sent to move the domain
assignment to PCI core code.

http://lists.infradead.org/pipermail/linux-arm-kernel/2014-November/301220.html

Lorenzo

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