linux-kernel - Re: [PATCH 3/4 V3] irqchip: gic: Add supports for ARM GICv2m MSI(-X)

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Date:	Thu, 17 Jul 2014 09:13:20 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	suravee.suthikulpanit@....com
Cc:	marc.zyngier@....com, mark.rutland@....com, pawel.moll@....com,
	Catalin.Marinas@....com, Will.Deacon@....com, tglx@...utronix.de,
	Harish.Kasiviswanathan@....com,
	linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 3/4 V3] irqchip: gic: Add supports for ARM GICv2m
 MSI(-X)

On Wed, Jul 09, 2014 at 06:05:03PM -0500, suravee.suthikulpanit@....com wrote:
> From: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
> 
> ARM GICv2m specification extends GICv2 to support MSI(-X) with
> a new set of register frames. This patch introduces support for
> the non-secure GICv2m register frame.
> 
> The driver currently matchs "arm,gic-400-plus" in device tree binding,
> which implements GICv2m.
> 
> The "msi-controller" keyword in ARM GIC devicetree binding is used to indentify
> GIC driver that it should enable MSI(-X) support, The region of GICv2m MSI
> register frame is specified using the register frame index 4 in the device tree.
> MSI support is optional.
> 
> Each GIC maintains an "msi_chip" structure. To discover the msi_chip,
> PCI host driver can do the following:
> 
>     struct device_node *gic_node = of_irq_find_parent(pdev->dev.of_node);
>     pcie_bus->msi_chip = of_pci_find_msi_chip_by_node(gic_node);
> 
> Cc: Mark Rutland <Mark.Rutland@....com>
> Cc: Marc Zyngier <Marc.Zyngier@....com>
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: Catalin Marinas <Catalin.Marinas@....com>
> Cc: Will Deacon <Will.Deacon@....com>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
> ---
>  Documentation/devicetree/bindings/arm/gic.txt |  20 +-
>  arch/arm64/Kconfig                            |   1 +
>  drivers/irqchip/Kconfig                       |   7 +
>  drivers/irqchip/Makefile                      |   1 +
>  drivers/irqchip/irq-gic-v2m.c                 | 251 ++++++++++++++++++++++++++
>  drivers/irqchip/irq-gic-v2m.h                 |  13 ++
>  drivers/irqchip/irq-gic.c                     |  23 ++-
>  drivers/irqchip/irq-gic.h                     |  31 +++-
>  8 files changed, 334 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/irqchip/irq-gic-v2m.c
>  create mode 100644 drivers/irqchip/irq-gic-v2m.h

Applied to irqchip/gic with some minor typos fixed in the commit
message.

thx,

Jason.
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