linux-kernel - Re: [PATCH v5 20/20] PCI: dwc: Add Baikal-T1 PCIe controller support

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Message-ID: <20220926143127.GB19031@lst.de>
Date:   Mon, 26 Sep 2022 16:31:28 +0200
From:   Christoph Hellwig <hch@....de>
To:     Serge Semin <fancer.lancer@...il.com>
Cc:     Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        William McVicker <willmcvicker@...gle.com>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 20/20] PCI: dwc: Add Baikal-T1 PCIe controller
 support

On Mon, Sep 26, 2022 at 03:49:24PM +0300, Serge Semin wrote:
> @Christoph, @Marek, @Bjorn, @Rob could you please join to the
> DMA-mask related discussion. @Lorenzo can't decide which driver should
> initialize the device DMA-mask.

The driver that does the actual DMA mapping or allocation functions
need to set it.  But even with your comments on the questions I'm
still confused what struct device you are even talking about.  Can
you explain this a bit better?