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From:   "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Date:   Wed, 9 Feb 2022 08:52:33 +0000
Message-ID: <CA+V-a8tEwOR-r=+KDe2DhpTMwhXPTgbZYgOWepST3mnhBL_Hag@mail.gmail.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
To:     Li Chen <lchen@ambarella.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Marek Vasut <marek.vasut+renesas@gmail.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Rob Herring <robh@kernel.org>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        "linux-renesas-soc@vger.kernel.org" 
        <linux-renesas-soc@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Biju Das <biju.das.jz@bp.renesas.com>
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Hi Chen-san,

On Wed, Feb 9, 2022 at 4:48 AM Li Chen <lchen@ambarella.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 i=
nstead 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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