linux-kernel - Re: [PATCH v8 00/15] ACPI platform MSI support and its example mbigen

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Date:   Fri, 3 Feb 2017 16:40:32 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Sinan Kaya <okaya@...eaurora.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     Hanjun Guo <guohanjun@...wei.com>, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Tomasz Nowicki <tn@...ihalf.com>, Ma Jun <majun258@...wei.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Agustin Vega-Frias <agustinv@...eaurora.org>,
        huxinwei@...wei.com, yimin@...wei.com, linuxarm@...wei.com,
        Matthias Brugger <mbrugger@...e.com>,
        Wei Xu <xuwei5@...ilicon.com>,
        Ming Lei <tom.leiming@...il.com>,
        Hanjun Guo <hanjun.guo@...aro.org>
Subject: Re: [PATCH v8 00/15] ACPI platform MSI support and its example mbigen

On Fri, Feb 03, 2017 at 10:57:44AM -0500, Sinan Kaya wrote:
> On 2/3/2017 10:49 AM, Marc Zyngier wrote:
> >> Patches 13-15 are specific for MBIGEN. 00-12 are for the base functionality.
> > Is that to support SMMUv3's own MSI generation? It would be helpful if
> > you explained why you want this code to be merged beforehand,
> > potentially without any in-tree user.
> 
> Sure, I'm more interested in supporting MSI on my HIDMA code rather than
> MSI on SMMUv3.
> 
> HIDMA MSI patches were merged November 2016.
> 
> https://github.com/torvalds/linux/commits/master/drivers/dma/qcom/hidma.c
> 
> Commits on Nov 3, 2016
>  @vinodkoul
> dmaengine: qcom_hidma: add MSI support for interrupts  …
> Sinan Kaya committed with vinodkoul on Oct 21, 2016
> 
> I tested the first 12 patches of this series against HIDMA and provided
> my tested-by.

Ok, we should have split this series before then. Now, if:

(1) Marc is ok with patches [4-7,10,12]
(2) Your HIDMA MSI does not depend on Agustin patch series to work
(3) Rafael is ok with a pull request at -rc7 (ie I won't be able to
    send it before then since I want to test it)

I will send a pull request to Rafael for patches [1-12] on Monday.

If any of (1)-(2)-(3) does not hold it is going to be v4.12, a
single driver is not the end of the world (and this will give us
time to add support for SMMUv3 MSI that this series can't handle).

Thanks,
Lorenzo