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Mon, 20 Jul 2020 16:16:23 -0700 (PDT) Received: from xps15 ([64.188.179.252]) by smtp.gmail.com with ESMTPSA id h11sm9515742ilh.69.2020.07.20.16.16.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2020 16:16:22 -0700 (PDT) Received: (nullmailer pid 3136375 invoked by uid 1000); Mon, 20 Jul 2020 23:16:21 -0000 Date: Mon, 20 Jul 2020 17:16:21 -0600 From: Rob Herring To: Yong Wu Subject: Re: [PATCH 04/21] dt-binding: mediatek: Add binding for mt8192 IOMMU and SMI Message-ID: <20200720231621.GA3106350@bogus> References: <20200711064846.16007-1-yong.wu@mediatek.com> <20200711064846.16007-5-yong.wu@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200711064846.16007-5-yong.wu@mediatek.com> Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , cui.zhang@mediatek.com, srv_heupstream@mediatek.com, chao.hao@mediatek.com, Robin Murphy , linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, Matthias Brugger , ming-fan.chen@mediatek.com, anan.sun@mediatek.com, Will Deacon , linux-arm-kernel@lists.infradead.org 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 Sat, Jul 11, 2020 at 02:48:29PM +0800, Yong Wu wrote: > This patch adds decriptions for mt8192 IOMMU and SMI. > > mt8192 also is MTK IOMMU gen2 which uses ARM Short-Descriptor translation > table format. The M4U-SMI HW diagram is as below: > > EMI > | > M4U > | > ------------ > SMI Common > ------------ > | > +-------+------+------+----------------------+-------+ > | | | | ...... | | > | | | | | | > larb0 larb1 larb2 larb4 ...... larb19 larb20 > disp0 disp1 mdp vdec IPE IPE > > All the connections are HW fixed, SW can NOT adjust it. > > mt8192 M4U support 0~16GB iova range. we preassign different engines > into different iova ranges: > > domain-id module iova-range larbs > 0 disp 0 ~ 4G larb0/1 > 1 vcodec 4G ~ 8G larb4/5/7 > 2 cam/mdp 8G ~ 12G larb2/9/11/13/14/16/17/18/19/20 > 3 CCU0 0x4000_0000 ~ 0x43ff_ffff larb13: port 9/10 > 4 CCU1 0x4400_0000 ~ 0x47ff_ffff larb14: port 4/5 You probably want to use dma-ranges for defining these address restrictions. How is the domain-id used or needed? Rob _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu