linux-kernel - Re: [PATCH v5 2/5] PCI: designware: refactor MSI code to work with v3.65 dw hardware

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Date:	Thu, 17 Jul 2014 09:01:32 +0530
From:	Pratyush Anand <pratyush.anand@...com>
To:	Murali Karicheri <m-karicheri2@...com>
Cc:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.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 v5 2/5] PCI: designware: refactor MSI code to work with
 v3.65 dw hardware

On Thu, Jul 17, 2014 at 12:38:03AM +0800, Murali Karicheri wrote:
> Keystone PCI controller is based on v3.65 version of the DW
> PCI h/w that implements MSI controller registers in application
> space compared to the newer version. This requires updates to
> the DW core API to support the PCI controller driver based on
> this old DW hardware. Add msi_irq_set()/clear() API functions to
> allow Set/Clear MSI IRQ enable bit in the application register.
> Also the old h/w uses MSI_IRQ register in application register
> space to raise MSI IRQ to the RC from EP. Current code uses the
> standard mechanism as per PCI spec. So add another API get_msi_data()
> to get the address of this register so that common code can be
> re-used on old h/w.
> 
> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
> Acked-by: Mohit Kumar <mohit.kumar@...com>
> Acked-by: Jingoo Han <jg1.han@...sung.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>
> 

Reviewed-by: Pratyush Anand <pratyush.anand@...com>
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