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[209.85.166.51]) by smtp.gmail.com with ESMTPSA id b22sm3946922ioa.10.2021.01.15.05.08.25 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Jan 2021 05:08:26 -0800 (PST) Received: by mail-io1-f51.google.com with SMTP id q2so16279853iow.13 for ; Fri, 15 Jan 2021 05:08:25 -0800 (PST) X-Received: by 2002:a05:6e02:cc7:: with SMTP id c7mr10850857ilj.218.1610716105308; Fri, 15 Jan 2021 05:08:25 -0800 (PST) MIME-Version: 1.0 References: <20201125221917.150463-1-ribalda@chromium.org> <20201130083410.GD32234@lst.de> <20201201033658.GE3723071@google.com> <20201201144916.GA14682@lst.de> <20201208071320.GA1667627@google.com> <20201209111639.GB22806@lst.de> <20210111083614.GA27589@lst.de> In-Reply-To: <20210111083614.GA27589@lst.de> From: Ricardo Ribalda Date: Fri, 15 Jan 2021 14:08:14 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v3 5/6] media: uvcvideo: Use dma_alloc_noncontiguos API To: ". Christoph Hellwig" Cc: Sergey Senozhatsky , Sergey Senozhatsky , Linux Doc Mailing List , Linux Kernel Mailing List , IOMMU DRIVERS , Linux Media Mailing List , Mauro Carvalho Chehab , Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Mon, Jan 11, 2021 at 9:36 AM . Christoph Hellwig wrote: > > On Thu, Jan 07, 2021 at 03:14:08PM +0100, Ricardo Ribalda wrote: > > > So I think we do want these branches for coherent vs non-coherent as they > > > have very different semantics and I do not think that hiding them under > > > the same API helps people to understand those vastly different semantics. > > > > > > OTOH we should look into a fallback for DMA API instances that do not > > > support the discontigous allocations. > > > > > > I think between your comments and those from Ricardo I have a good idea > > > for a somewhat updated API. I'll try to post something in the next days. > > > > Did you have time to look into this? > > > > No hurry, I just want to make sure that I didn't miss anything ;) > > Haven't managed to get to it, sorry. No worries!, is there something we can do to help you with this? > > > > > Best regards! > > > > > > > > -- > > Ricardo Ribalda > ---end quoted text--- -- Ricardo Ribalda _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu