linux-kernel - Re: [RFC PATCH v4 10/13] soc: ti: Add MSI domain support for K3 Interrupt Aggregator

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Message-ID: <20190115144123.3lmt4qqi5y5ssiym@kahuna>
Date:   Tue, 15 Jan 2019 08:41:23 -0600
From:   Nishanth Menon <nm@...com>
To:     Lokesh Vutla <lokeshvutla@...com>
CC:     <marc.zyngier@....com>, Santosh Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, <tglx@...utronix.de>,
        <jason@...edaemon.net>,
        Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Tero Kristo <t-kristo@...com>,
        Sekhar Nori <nsekhar@...com>,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        Peter Ujfalusi <peter.ujfalusi@...com>
Subject: Re: [RFC PATCH v4 10/13] soc: ti: Add MSI domain support for K3
 Interrupt Aggregator

On 11:43-20181227, Lokesh Vutla wrote:
> With the system coprocessor managing the range allocation of the
> inputs to Interrupt Aggregator, it is difficult to represent
> the device IRQs from DT.
> 
> The suggestion is to use MSI in such cases where devices wants
> to allocate and group interrupts dynamically.
> 
> Create a MSI domain bus layer that allocates and frees MSIs for
> a device.
> 
> APIs that are implemented are:
> - inta_msi_create_irq_domain() that creates a MSI domain
> - inta_msi_domain_alloc_group_irqs() that creates MSIs for the
>   specified device and source indexes. All these are expected to
>   be grouped by the parent interrupt controller to MSI domain.
> - inta_msi_domain_free_group_irqs() frees the grouped irqs.
> 
> Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
> ---
> 
> - May be the same functionaly can be included in platform msi. But I would
>   like to get a feedback on the approach.
> 
>  drivers/soc/ti/Kconfig             |   6 +
>  drivers/soc/ti/Makefile            |   1 +
>  drivers/soc/ti/k3_inta_msi.c       | 193 +++++++++++++++++++++++++++++
>  include/linux/irqdomain.h          |   1 +
>  include/linux/msi.h                |   6 +
>  include/linux/soc/ti/k3_inta_msi.h |  22 ++++
>  6 files changed, 229 insertions(+)
>  create mode 100644 drivers/soc/ti/k3_inta_msi.c
>  create mode 100644 include/linux/soc/ti/k3_inta_msi.h

Did we miss maintainer file?

-- 
Regards,
Nishanth Menon