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?

Regards,
Li

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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 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
>
> **********************************************************************
> This email and attachments contain Ambarella Proprietary and/or Confidential Information and is intended solely for the use of the individual(s) to whom it is addressed. Any unauthorized review, use, disclosure, distribute, copy, or print is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy all copies of the original message. Thank you.

Hi Prabhakar,

> -----Original Message-----
> From: Lad, Prabhakar [mailto:prabhakar.csengg@gmail.com]
> Sent: Wednesday, February 9, 2022 4:53 PM
> To: Li Chen
> Cc: Lad Prabhakar; Kishon Vijay Abraham I; Bjorn Helgaas; Lorenzo Pieralisi;
> Krzysztof Wilczyński; Arnd Bergmann; Greg Kroah-Hartman; Marek Vasut;
> Yoshihiro Shimoda; Rob Herring; linux-pci@vger.kernel.org; linux-renesas-
> soc@vger.kernel.org; linux-kernel@vger.kernel.org; Biju Das
> 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@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
> 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.

Ok, in my case, read/write via external DMAC always get incorrect data, but read via internal DMAC is correct. Maybe this is our RTL's issue.

Regards,
Li

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On Thu, Feb 10, 2022 at 05:54:26AM +0000, Li Chen wrote:
> **********************************************************************
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