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Received: from DB9PR04MB9380.eurprd04.prod.outlook.com (2603:10a6:10:368::16) by PAXPR04MB8142.eurprd04.prod.outlook.com (2603:10a6:102:1ce::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6792.19; Thu, 14 Sep 2023 14:57:04 +0000 Received: from DB9PR04MB9380.eurprd04.prod.outlook.com ([fe80::179f:1c4a:4573:acb9]) by DB9PR04MB9380.eurprd04.prod.outlook.com ([fe80::179f:1c4a:4573:acb9%4]) with mapi id 15.20.6768.029; Thu, 14 Sep 2023 14:57:04 +0000 From: Laurentiu Tudor To: shawnguo@kernel.org, leoyang.li@nxp.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Laurentiu Tudor Subject: [PATCH] arm64: dts: ls208xa: use a pseudo-bus to constrain usb dma size Date: Thu, 14 Sep 2023 17:56:52 +0300 Message-Id: <20230914145652.25728-1-laurentiu.tudor@nxp.com> X-Mailer: git-send-email 2.17.1 X-ClientProxiedBy: AM0PR06CA0078.eurprd06.prod.outlook.com (2603:10a6:208:fa::19) To DB9PR04MB9380.eurprd04.prod.outlook.com (2603:10a6:10:368::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB9PR04MB9380:EE_|PAXPR04MB8142:EE_ X-MS-Office365-Filtering-Correlation-Id: 418cdd3f-9edd-4533-7771-08dbb532dbcf X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Thu, 14 Sep 2023 07:57:12 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777035358170381121 X-GMAIL-MSGID: 1777035358170381121 Wrap the usb controllers in an intermediate simple-bus and use it to constrain the dma address size of these usb controllers to the 40b that they generate toward the interconnect. This is required because the SoC uses 48b address sizes and this mismatch would lead to smmu context faults [1] because the usb generates 40b addresses while the smmu page tables are populated with 48b wide addresses. [1] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1 xhci-hcd xhci-hcd.0.auto: hcc params 0x0220f66d hci version 0x100 quirks 0x0000000002000010 xhci-hcd xhci-hcd.0.auto: irq 108, io mem 0x03100000 xhci-hcd xhci-hcd.0.auto: xHCI Host Controller xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 2 xhci-hcd xhci-hcd.0.auto: Host supports USB 3.0 SuperSpeed arm-smmu 5000000.iommu: Unhandled context fault: fsr=0x402, iova=0xffffffb000, fsynr=0x0, cbfrsynra=0xc01, cb=3 Signed-off-by: Laurentiu Tudor --- .../arm64/boot/dts/freescale/fsl-ls208xa.dtsi | 46 +++++++++++-------- 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi index d2f5345d0560..47cc7699ca16 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi @@ -1186,26 +1186,34 @@ dma-coherent; }; - usb0: usb@3100000 { - status = "disabled"; - compatible = "snps,dwc3"; - reg = <0x0 0x3100000 0x0 0x10000>; - interrupts = <0 80 0x4>; /* Level high type */ - dr_mode = "host"; - snps,quirk-frame-length-adjustment = <0x20>; - snps,dis_rxdet_inp3_quirk; - snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; - }; + aux_bus: aux_bus { + #address-cells = <2>; + #size-cells = <2>; + compatible = "simple-bus"; + ranges; + dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x00000000>; + + usb0: usb@3100000 { + status = "disabled"; + compatible = "snps,dwc3"; + reg = <0x0 0x3100000 0x0 0x10000>; + interrupts = <0 80 0x4>; /* Level high type */ + dr_mode = "host"; + snps,quirk-frame-length-adjustment = <0x20>; + snps,dis_rxdet_inp3_quirk; + snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; + }; - usb1: usb@3110000 { - status = "disabled"; - compatible = "snps,dwc3"; - reg = <0x0 0x3110000 0x0 0x10000>; - interrupts = <0 81 0x4>; /* Level high type */ - dr_mode = "host"; - snps,quirk-frame-length-adjustment = <0x20>; - snps,dis_rxdet_inp3_quirk; - snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; + usb1: usb@3110000 { + status = "disabled"; + compatible = "snps,dwc3"; + reg = <0x0 0x3110000 0x0 0x10000>; + interrupts = <0 81 0x4>; /* Level high type */ + dr_mode = "host"; + snps,quirk-frame-length-adjustment = <0x20>; + snps,dis_rxdet_inp3_quirk; + snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; + }; }; ccn@4000000 {