linux-kernel - Re: [EXT] [RFC PATCH 0/5] PCIe EPF support for internal DMAC handling and driver update for R-Car PCIe EP to support DMAC

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Message-ID: <CA+V-a8tEwOR-r=+KDe2DhpTMwhXPTgbZYgOWepST3mnhBL_Hag@mail.gmail.com>
Date:   Wed, 9 Feb 2022 08:52:33 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Li Chen <lchen@...arella.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Rob Herring <robh@...nel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [EXT] [RFC PATCH 0/5] PCIe EPF support for internal DMAC handling
 and driver update for R-Car PCIe EP to support DMAC

Hi Chen-san,

On Wed, Feb 9, 2022 at 4:48 AM Li Chen <lchen@...arella.com> wrote:
>
> Hi Prabhakar,
>
> > [0] https://urldefense.com/v3/__https://www.spinics.net/lists/linux-
> > pci/msg92385.html__;!!PeEy7nZLVv0!yP0WqYs165riCjWRhZprjgMVVLfQLtkkPfv_
> > R7XCoqkqgMsOyor90EZp0YAdxu0$
>
> Can your streaming DMA test case(-d) pass if you use EP's internal DMAC instead of external DMAC?
>
Sorry I don't quite get you here.

This patch series adds support for EP to transfer using internal DMAC
as no external DMAC is supported, so when "-d" option is passed and if
EP has registered it has internal dmac it will use the same and run
the pcitest.

Cheers,
Prabhakar

> Regards,
> Li
>
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