linux-kernel - RE: [PATCH v3 1/5] PCI: designware: add rd[wr]_other

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Date:	Mon, 7 Jul 2014 12:11:04 +0800
From:	Mohit KUMAR DCG <Mohit.KUMAR@...com>
To:	Murali Karicheri <m-karicheri2@...com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Cc:	Santosh Shilimkar <santosh.shilimkar@...com>,
	Russell King <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Pratyush ANAND <pratyush.anand@...com>,
	Richard Zhu <r65037@...escale.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Marek Vasut <marex@...x.de>, Arnd Bergmann <arnd@...db.de>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Randy Dunlap <rdunlap@...radead.org>
Subject: RE: [PATCH v3 1/5] PCI: designware: add rd[wr]_other_conf API

Hello Murali,

> -----Original Message-----
> From: Murali Karicheri [mailto:m-karicheri2@...com]
> Sent: Tuesday, July 01, 2014 3:15 AM
> To: linux-pci@...r.kernel.org; linux-kernel@...r.kernel.org;
> devicetree@...r.kernel.org
> Cc: Murali Karicheri; Santosh Shilimkar; Russell King; Grant Likely; Rob Herring;
> Mohit KUMAR DCG; Jingoo Han; Bjorn Helgaas; Pratyush ANAND; Richard
> Zhu; Kishon Vijay Abraham I; Marek Vasut; Arnd Bergmann; Pawel Moll;
> Mark Rutland; Ian Campbell; Kumar Gala; Randy Dunlap
> Subject: [PATCH v3 1/5] PCI: designware: add rd[wr]_other_conf API
> 
> v3.65 version of the designware h/w, requires application space registers to
> be configured to access the remote EP config space.
> To support this, add rd[wr]_other_conf API in the pcie_host_opts
> 
> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
> 
> CC: Santosh Shilimkar <santosh.shilimkar@...com>
> CC: Russell King <linux@....linux.org.uk>
> CC: Grant Likely <grant.likely@...aro.org>
> CC: Rob Herring <robh+dt@...nel.org>
> CC: Mohit Kumar <mohit.kumar@...com>
> CC: Jingoo Han <jg1.han@...sung.com>
> CC: Bjorn Helgaas <bhelgaas@...gle.com>
> CC: Pratyush Anand <pratyush.anand@...com>
> CC: Richard Zhu <r65037@...escale.com>
> CC: Kishon Vijay Abraham I <kishon@...com>
> CC: Marek Vasut <marex@...x.de>
> CC: Arnd Bergmann <arnd@...db.de>
> CC: Pawel Moll <pawel.moll@....com>
> CC: Mark Rutland <mark.rutland@....com>
> CC: Ian Campbell <ijc+devicetree@...lion.org.uk>
> CC: Kumar Gala <galak@...eaurora.org>
> CC: Randy Dunlap <rdunlap@...radead.org>
> CC: Grant Likely <grant.likely@...aro.org>
> ---
>  drivers/pci/host/pcie-designware.c |   12 ++++++++++--
>  drivers/pci/host/pcie-designware.h |    4 ++++
>  2 files changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-
> designware.c
> index 1eaf4df..d8f3af7 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -656,7 +656,11 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32
> devfn, int where,
>  	}
> 
>  	if (bus->number != pp->root_bus_nr)
> -		ret = dw_pcie_rd_other_conf(pp, bus, devfn,
> +		if (pp->ops->rd_other_conf)
> +			ret = pp->ops->rd_other_conf(pp, bus, devfn,
> +						where, size, val);
> +		else
> +			ret = dw_pcie_rd_other_conf(pp, bus, devfn,
>  						where, size, val);
>  	else
>  		ret = dw_pcie_rd_own_conf(pp, where, size, val); @@ -
> 679,7 +683,11 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32
> devfn,
>  		return PCIBIOS_DEVICE_NOT_FOUND;
> 
>  	if (bus->number != pp->root_bus_nr)
> -		ret = dw_pcie_wr_other_conf(pp, bus, devfn,
> +		if (pp->ops->wr_other_conf)
> +			ret = pp->ops->wr_other_conf(pp, bus, devfn,
> +						where, size, val);
> +		else
> +			ret = dw_pcie_wr_other_conf(pp, bus, devfn,
>  						where, size, val);
>  	else
>  		ret = dw_pcie_wr_own_conf(pp, where, size, val); diff --git
> a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
> index 77f592f..8121901 100644
> --- a/drivers/pci/host/pcie-designware.h
> +++ b/drivers/pci/host/pcie-designware.h
> @@ -61,6 +61,10 @@ struct pcie_host_ops {
>  			u32 val, void __iomem *dbi_base);
>  	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32
> *val);
>  	int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32
> val);
> +	int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
> +			unsigned int devfn, int where, int size, u32 *val);
> +	int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
> +			unsigned int devfn, int where, int size, u32 val);
>  	int (*link_up)(struct pcie_port *pp);
>  	void (*host_init)(struct pcie_port *pp);  };

- Now it looks good to me.

Acked-by: Mohit Kumar <mohit.kumar@...com>

Regards
Mohit
> --
> 1.7.9.5

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