Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754359AbbEOJn6 (ORCPT ); Fri, 15 May 2015 05:43:58 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:51580 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753729AbbEOJny (ORCPT ); Fri, 15 May 2015 05:43:54 -0400 X-Listener-Flag: 11101 From: Yong Wu To: Rob Herring , Joerg Roedel , Matthias Brugger CC: Robin Murphy , Will Deacon , Daniel Kurtz , Tomasz Figa , Lucas Stach , Mark Rutland , Catalin Marinas , , Sasha Hauer , , , , , , , , , , Subject: [RFC v2 PATCH 0/6] MT8173 IOMMU SUPPORT Date: Fri, 15 May 2015 17:43:23 +0800 Message-ID: <1431683009-18158-1-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4103 Lines: 90 This patch adds support for m4u(Multimedia Memory Management Unit), Currently it only support the m4u with 2 levels of page table on mt8173. It is based on Robin Murphy's arm64: IOMMU-backed DMA mapping[1]. Please check the hardware block diagram of Mediatek IOMMU. EMI (External Memory Interface) | m4u (Multimedia Memory Management Unit) | smi (Smart Multimedia Interface) | +---------------+------- | | | | vdec larb disp larb ... SoCs have different local arbiter(larb). | | | | +----+----+ +-----+-----+ | | | | | | ... | | | | | | ... | | | | | | ... MC PP VLD OVL0 RDMA0 WDMA0 ... There are different ports in each larb. Normally we specify a local arbiter(larb) for each multimedia hardware like display, video decode, video encode and camera. And there are different ports in each larb. Take a example, there are some ports like MC, PP, UFO, VLD, AVC_MV, PRED_RD, PRED_WR in video larb, all the ports are according to the video hardware. From the diagram, all the multimedia module connect with m4u via smi. SMI is responsible to enable/disable iommu and control the clocks for each local arbiter. If we should enable the iommu of video decode, it should config the video's ports. And if the video hardware work wether enable/disable iommu, it should enable the clock of its larb's clock. So we add a special driver for smi. [1] http://lists.linuxfoundation.org/pipermail/iommu/2015-February/012236.html v2: -add arm short descriptor support. -seperate smi common from smi and change the clock-names according to smi HW. -delete the hardcode of the port-names in mt8173. replace this with larb-portes-nr in dtsi. -fix some coding style issues. v1: http://lists.infradead.org/pipermail/linux-mediatek/2015-March/000058.html Yong Wu (6): dt-bindings: iommu: Add binding for mediatek IOMMU dt-bindings: mediatek: Add smi dts binding iommu: add ARM short descriptor page table allocator. iommu/mediatek: Add mt8173 IOMMU driver soc: mediatek: Add SMI driver dts: mt8173: Add iommu/smi nodes for mt8173 .../devicetree/bindings/iommu/mediatek,iommu.txt | 51 ++ .../bindings/soc/mediatek/mediatek,smi-larb.txt | 24 + .../bindings/soc/mediatek/mediatek,smi.txt | 22 + arch/arm64/boot/dts/mediatek/mt8173.dtsi | 79 +++ drivers/iommu/Kconfig | 18 + drivers/iommu/Makefile | 2 + drivers/iommu/io-pgtable-arm-short.c | 490 +++++++++++++++ drivers/iommu/io-pgtable.c | 4 + drivers/iommu/io-pgtable.h | 6 + drivers/iommu/mtk_iommu.c | 657 +++++++++++++++++++++ drivers/soc/mediatek/Kconfig | 6 + drivers/soc/mediatek/Makefile | 1 + drivers/soc/mediatek/mt8173-smi.c | 298 ++++++++++ include/dt-bindings/iommu/mt8173-iommu-port.h | 112 ++++ include/linux/mtk-smi.h | 39 ++ 15 files changed, 1809 insertions(+) create mode 100644 Documentation/devicetree/bindings/iommu/mediatek,iommu.txt create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mediatek,smi-larb.txt create mode 100644 Documentation/devicetree/bindings/soc/mediatek/mediatek,smi.txt create mode 100644 drivers/iommu/io-pgtable-arm-short.c create mode 100644 drivers/iommu/mtk_iommu.c create mode 100644 drivers/soc/mediatek/mt8173-smi.c create mode 100644 include/dt-bindings/iommu/mt8173-iommu-port.h create mode 100644 include/linux/mtk-smi.h -- 1.8.1.1.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/