linux-kernel - Re: [PATCH v9 06/11] dma-buf: provide phys

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Message-ID: <20251120100312.GV18335@unreal>
Date: Thu, 20 Nov 2025 12:03:12 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Christian König <christian.koenig@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Logan Gunthorpe <logang@...tatee.com>, Jens Axboe <axboe@...nel.dk>,
	Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>,
	Sumit Semwal <sumit.semwal@...aro.org>, Kees Cook <kees@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Ankit Agrawal <ankita@...dia.com>,
	Yishai Hadas <yishaih@...dia.com>,
	Shameer Kolothum <skolothumtho@...dia.com>,
	Kevin Tian <kevin.tian@...el.com>,
	Alex Williamson <alex@...zbot.org>,
	Krishnakant Jaju <kjaju@...dia.com>, Matt Ochs <mochs@...dia.com>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-block@...r.kernel.org, iommu@...ts.linux.dev,
	linux-mm@...ck.org, linux-doc@...r.kernel.org,
	linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linaro-mm-sig@...ts.linaro.org, kvm@...r.kernel.org,
	linux-hardening@...r.kernel.org, Nicolin Chen <nicolinc@...dia.com>,
	Alex Mastro <amastro@...com>, Jason Gunthorpe <jgg@...dia.com>
Subject: Re: [PATCH v9 06/11] dma-buf: provide phys_vec to scatter-gather
 mapping routine

On Thu, Nov 20, 2025 at 10:33:36AM +0100, Christian König wrote:
> On 11/20/25 10:28, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@...dia.com>
> > 
> > Add dma_buf_phys_vec_to_sgt() and dma_buf_free_sgt() helpers to convert
> > an array of MMIO physical address ranges into scatter-gather tables with
> > proper DMA mapping.

<...>

> > Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> > Reviewed-by: Nicolin Chen <nicolinc@...dia.com>
> > Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> > Tested-by: Alex Mastro <amastro@...com>
> > Tested-by: Nicolin Chen <nicolinc@...dia.com>
> > Signed-off-by: Leon Romanovsky <leonro@...dia.com>
> 
> Could be that this will backfire at some point, but I think we will never know without trying.
> 
> Acked-by: Christian König <christian.koenig@....com>

Thanks a lot.