linux-kernel - Re: [PATCH v9 3/7] iommu: Add verisilicon IOMMU driver

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Message-ID: <vrngq76nnms3jyl5hnxqnkimjc6kil66o6fdyqn5vm3fpovmja@cfynipjw7ktp>
Date: Fri, 12 Sep 2025 13:47:43 +0200
From: Jörg Rödel <joro@...tes.org>
To: Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc: robin.murphy@....com, robh@...nel.org, krzk+dt@...nel.org, 
	conor+dt@...nel.org, heiko@...ech.de, nicolas.dufresne@...labora.com, jgg@...pe.ca, 
	p.zabel@...gutronix.de, mchehab@...nel.org, iommu@...ts.linux.dev, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, kernel@...labora.com, 
	linux-media@...r.kernel.org
Subject: Re: [PATCH v9 3/7] iommu: Add verisilicon IOMMU driver

On Thu, Sep 11, 2025 at 05:57:13PM +0200, Benjamin Gaignard wrote:
> The Verisilicon IOMMU hardware block can be found in combination
> with Verisilicon hardware video codecs (encoders or decoders) on
> different SoCs.
> Enable it will allow us to use non contiguous memory allocators
> for Verisilicon video codecs.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> ---
>  drivers/iommu/Kconfig     |  11 +
>  drivers/iommu/Makefile    |   1 +
>  drivers/iommu/vsi-iommu.c | 808 ++++++++++++++++++++++++++++++++++++++
>  include/linux/vsi-iommu.h |  21 +
>  4 files changed, 841 insertions(+)
>  create mode 100644 drivers/iommu/vsi-iommu.c
>  create mode 100644 include/linux/vsi-iommu.h

This will not go in before Will Deacons comment about code duplication with the
Rockchip driver is addressed.


	Joerg