linux-kernel - Re: [PATCH v9 15/16] drivers: acpi: iort: add single mapping function

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Date:   Wed, 30 Nov 2016 11:22:42 +0800
From:   Hanjun Guo <hanjun.guo@...aro.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        iommu@...ts.linux-foundation.org
Cc:     Tomasz Nowicki <tn@...ihalf.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Will Deacon <will.deacon@....com>,
        Marc Zyngier <marc.zyngier@....com>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, Jon Masters <jcm@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Sinan Kaya <okaya@...eaurora.org>,
        Nate Watterson <nwatters@...eaurora.org>,
        Prem Mallappa <prem.mallappa@...adcom.com>,
        Dennis Chen <dennis.chen@....com>, linux-acpi@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v9 15/16] drivers: acpi: iort: add single mapping function

On 2016/11/21 18:01, Lorenzo Pieralisi wrote:
> The current IORT id mapping API requires components to provide
> an input requester ID (a Bus-Device-Function (BDF) identifier for
> PCI devices) to translate an input identifier to an output
> identifier through an IORT range mapping.
>
> Named components do not have an identifiable source ID therefore
> their respective input/output mapping can only be defined in
> IORT tables through single mappings, that provide a translation
> that does not require any input identifier.
>
> Current IORT interface for requester id mappings (iort_node_map_rid())
> is not suitable for components that do not provide a requester id,
> so it cannot be used for IORT named components.
>
> Add an interface to the IORT API to enable retrieval of id
> by allowing an indexed walk of the single mappings array for
> a given component, therefore completing the IORT mapping API.
>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> Reviewed-by: Tomasz Nowicki <tn@...ihalf.com>
> Tested-by: Hanjun Guo <hanjun.guo@...aro.org>
> Tested-by: Tomasz Nowicki <tn@...ihalf.com>
> Cc: Hanjun Guo <hanjun.guo@...aro.org>
> Cc: Tomasz Nowicki <tn@...ihalf.com>
> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
> ---
>  drivers/acpi/arm64/iort.c | 39 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)

Acked-by: Hanjun Guo <hanjun.guo@...aro.org>

Thanks
Hanjun