linux-kernel - Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts

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Message-ID: <CAHp75Vd+u5va3kyqcapeF9JATUfv5gBnoEM_W+frDmMXs5f2Uw@mail.gmail.com>
Date:   Fri, 21 Oct 2016 22:11:41 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Sinan Kaya <okaya@...eaurora.org>
Cc:     dmaengine <dmaengine@...r.kernel.org>,
        Timur Tabi <timur@...eaurora.org>,
        devicetree <devicetree@...r.kernel.org>,
        Christopher Covington <cov@...eaurora.org>,
        Vinod Koul <vinod.koul@...el.com>,
        Jon Masters <jcm@...hat.com>,
        Andy Gross <agross@...eaurora.org>,
        Arnd Bergmann <arnd@...db.de>, linux-arm-msm@...r.kernel.org,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V7 4/4] dmaengine: qcom_hidma: add MSI support for interrupts

On Fri, Oct 21, 2016 at 7:37 PM, Sinan Kaya <okaya@...eaurora.org> wrote:
> The interrupts can now be delivered as platform MSI interrupts on newer
> platforms. The code looks for a new OF and ACPI strings in order to enable
> the functionality.

> +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
> +static void hidma_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
> +{
> +       struct device *dev = msi_desc_to_dev(desc);
> +       struct hidma_dev *dmadev = dev_get_drvdata(dev);
> +
> +       if (!desc->platform.msi_index) {
> +               writel(msg->address_lo, dmadev->dev_evca + 0x118);
> +               writel(msg->address_hi, dmadev->dev_evca + 0x11C);
> +               writel(msg->data, dmadev->dev_evca + 0x120);
> +       }
> +}
> +#endif
> +
> +static void hidma_free_msis(struct hidma_dev *dmadev)
> +{
> +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN

Perhaps one #ifdef and two definitions of functions?

-- 
With Best Regards,
Andy Shevchenko