From nobody Sat Apr 11 02:53:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E52BC64ED6 for ; Tue, 28 Feb 2023 20:21:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229613AbjB1UV5 (ORCPT ); Tue, 28 Feb 2023 15:21:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229593AbjB1UVw (ORCPT ); Tue, 28 Feb 2023 15:21:52 -0500 Received: from wout3-smtp.messagingengine.com (wout3-smtp.messagingengine.com [64.147.123.19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CCA834336; Tue, 28 Feb 2023 12:21:48 -0800 (PST) Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.west.internal (Postfix) with ESMTP id 0290E32008FA; Tue, 28 Feb 2023 15:21:46 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Tue, 28 Feb 2023 15:21:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=cc:cc:content-transfer-encoding:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm1; t=1677615706; x= 1677702106; bh=tRDCxZFtukaHOUD+fpMmWdeVyai9y+sjwI29CnAl7cA=; b=Z kJEz7B0qMMNujmfkrzqEcMm2hYhts7x0GIjxc8PApiIkcaSLxREQhFrts20r02Uu cFm/t3xbHQqzNQwXSh00P+lJH+mkkhX60ISO32egN+3FcTrN7fv2uRiLpS90cECS XA6op3ndCXCjnnPov8FJNo9Gpau+aZCv7dooOF+E7tzwBhpyjiUvmmqxH43MOkij ML0McgY6PEVRvYl3WU0jctXLf5FDCw55kA662RaDKLpfXbkQwCi5BUhUaIEvgSlL tyQ9Dgqfj7+QhJuZATAXk1SLCN1kOyLr/kDTxooHcPe6iV7OwvVMJM406oR7oVDj y/62+xZd/9MmCdkyWC81g== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; t=1677615706; x=1677702106; bh=tRDCxZFtukaHO UD+fpMmWdeVyai9y+sjwI29CnAl7cA=; b=TWI0AO9FfDvAoGG60KH4G15wRNyg4 W2DhQRR+xv1I/HDi9htErE3Y/zbwkKniYcXLNliidZzSVuowPsdC5eOWB8/T/+DQ ENi1VZ/EvCAW/0deB+rIrn4PjNbDFqmphmFFoj1dCRWb77lBPVfJKPHkuMKJ+256 AaJGH5xRNxAwRfh6ao0iLKP6CFR77MGoPcNDUCXpok/7A6HMYVQS1FK7K51HRlUp zBRt27o2+isZ0A15Grric3b0gI7gp9VfzLE77EMGSjksLaLt4y6WzzsDQ48u1pz4 QgLLcGEJ+WY90gN7hjYtGHBNzn2+yVxljDFLJBs76D1Ixy21URktvAcfw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrudelfedgjeefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepufhvvghn ucfrvghtvghruceoshhvvghnsehsvhgvnhhpvghtvghrrdguvghvqeenucggtffrrghtth gvrhhnpeejieehheekgedvjefhveekjefguddtfefhteehtdeiffelkeeiuedufeelkeej geenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehsvh gvnhesshhvvghnphgvthgvrhdruggvvh X-ME-Proxy: Feedback-ID: i51094778:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 28 Feb 2023 15:21:43 -0500 (EST) From: Sven Peter To: Hector Martin , Sven Peter , Rob Herring , Krzysztof Kozlowski Cc: Alyssa Rosenzweig , Joerg Roedel , Will Deacon , Robin Murphy , linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/4] dt-bindings: iommu: dart: Add t8103-usb4-dart compatible Date: Tue, 28 Feb 2023 21:21:29 +0100 Message-Id: <20230228202132.4919-2-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20230228202132.4919-1-sven@svenpeter.dev> References: <20230228202132.4919-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This DART variant is found in the t8103 (M1) SoCs and used for the USB4/Thunderbolt PCIe ports. Unlike the regular t8103 DART these support up to 64 SIDs and require a slightly different MMIO layout. This variant is only found on the M1 SoCs. Acked-by: Hector Martin Signed-off-by: Sven Peter Acked-by: Rob Herring --- Documentation/devicetree/bindings/iommu/apple,dart.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/iommu/apple,dart.yaml b/Docu= mentation/devicetree/bindings/iommu/apple,dart.yaml index 903edf85d72e..7adb1de455a5 100644 --- a/Documentation/devicetree/bindings/iommu/apple,dart.yaml +++ b/Documentation/devicetree/bindings/iommu/apple,dart.yaml @@ -24,6 +24,7 @@ properties: compatible: enum: - apple,t8103-dart + - apple,t8103-usb4-dart - apple,t8110-dart - apple,t6000-dart =20 --=20 2.25.1 From nobody Sat Apr 11 02:53:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9EEBDC64EC7 for ; Tue, 28 Feb 2023 20:22:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229697AbjB1UWB (ORCPT ); Tue, 28 Feb 2023 15:22:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229659AbjB1UV4 (ORCPT ); Tue, 28 Feb 2023 15:21:56 -0500 Received: from wout3-smtp.messagingengine.com (wout3-smtp.messagingengine.com [64.147.123.19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3BD834C3D; Tue, 28 Feb 2023 12:21:52 -0800 (PST) Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.west.internal (Postfix) with ESMTP id 800B5320027A; Tue, 28 Feb 2023 15:21:51 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Tue, 28 Feb 2023 15:21:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=cc:cc:content-transfer-encoding:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm1; t=1677615711; x= 1677702111; bh=BAhcF142/IhXpreaLpl1FjM856sTe69lr6eU5Px591c=; b=p X1G6Ky6/Chkf38pzpeb+li5Xw6v/M6Ro+NF7iTGBNqJlOEOoMYhN9/3ciq8d3wG6 VEeooop0g+n4ZGJIllU+3CwebccYsB6iMDViLmHyyhQ+obW9v28EwPjPMXxazV2e Y3ycgqmXvVLEtft6Nxw1HjNH4dNC1tzmoxibOKSQgBgZBK9qP+DR7wUDn2ALVYGJ SvGacmcz/uRrqNFIvpyeE/xyybeLr4WgyzTJjB/5CRHcYQVmNB20RBAS1a2sPVob PTKbbgh3eUZfnAxdk87RpKy1vBygHYUx0Mzfh8zmzyCq5G7Yy80p7crw/hfsBls9 nwV0YHl3vt7xV6UK3DvhA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; t=1677615711; x=1677702111; bh=BAhcF142/IhXp reaLpl1FjM856sTe69lr6eU5Px591c=; b=UDhSkP4h6MGX0YuLyyd4UcMCiag5s GMifcgYHaG959sgIRShB369KGPh2fX2HBo0JbgDVEZNOEJJrOpzregoLNkUC8e56 arZyjkrcueYv9BAPaxlq2QmYiDoQ6i2BYPe1ybHWTot/gN9vou151W2PAu+FioW0 DL7c35pSCvO7yDIsjdpS63sWbpd4MMN3PW9Hu5bRunZ/ALVGlcTTKNn1vhFCr4Zy qiy570erQ6lBoC1n+KSAL2sL0JOGfZLqePU9XPLegrx/482mbRpgqCVphClvOa4H qZ5j1lBrt8HMV5MAd/cpIuuHiggA3XX7P2f29MxO7Sf5jjqaWXb5DWhdw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrudelfedgjeefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepufhvvghn ucfrvghtvghruceoshhvvghnsehsvhgvnhhpvghtvghrrdguvghvqeenucggtffrrghtth gvrhhnpeejieehheekgedvjefhveekjefguddtfefhteehtdeiffelkeeiuedufeelkeej geenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehsvh gvnhesshhvvghnphgvthgvrhdruggvvh X-ME-Proxy: Feedback-ID: i51094778:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 28 Feb 2023 15:21:48 -0500 (EST) From: Sven Peter To: Hector Martin , Sven Peter , Joerg Roedel , Will Deacon , Robin Murphy Cc: Rob Herring , Krzysztof Kozlowski , Alyssa Rosenzweig , linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/4] iommu: dart: Add flag to override bypass support Date: Tue, 28 Feb 2023 21:21:30 +0100 Message-Id: <20230228202132.4919-3-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20230228202132.4919-1-sven@svenpeter.dev> References: <20230228202132.4919-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The USB4 PCIe DARTs claim to support bypass but we never want to allow that on externally facing ports. Acked-by: Hector Martin Signed-off-by: Sven Peter --- drivers/iommu/apple-dart.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 42666617803d..7d8b2b90cdb6 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -182,6 +182,8 @@ struct apple_dart_hw { u64 ttbr_addr_field_shift; u64 ttbr_shift; int ttbr_count; + + bool disable_bypass; }; =20 /* @@ -1075,6 +1077,9 @@ static int apple_dart_probe(struct platform_device *p= dev) dart->pgsize =3D 1 << FIELD_GET(DART_PARAMS1_PAGE_SHIFT, dart_params[0]); dart->supports_bypass =3D dart_params[1] & DART_PARAMS2_BYPASS_SUPPORT; =20 + if (dart->hw->disable_bypass) + dart->supports_bypass =3D 0; + switch (dart->hw->type) { case DART_T8020: case DART_T6000: --=20 2.25.1 From nobody Sat Apr 11 02:53:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D81FC64EC7 for ; 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Tue, 28 Feb 2023 15:21:52 -0500 (EST) From: Sven Peter To: Hector Martin , Sven Peter , Joerg Roedel , Will Deacon , Robin Murphy Cc: Rob Herring , Krzysztof Kozlowski , Alyssa Rosenzweig , linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/4] iommu: dart: Write to all DART_T8020_STREAM_SELECT Date: Tue, 28 Feb 2023 21:21:31 +0100 Message-Id: <20230228202132.4919-4-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20230228202132.4919-1-sven@svenpeter.dev> References: <20230228202132.4919-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" We're about to add support for a DART variant that use more than 16 streams and requires writing to two separate stream select registers when issuing TLB flushes. Acked-by: Hector Martin Signed-off-by: Sven Peter --- drivers/iommu/apple-dart.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 7d8b2b90cdb6..7579c97a9062 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -372,12 +372,14 @@ apple_dart_t8020_hw_stream_command(struct apple_dart_= stream_map *stream_map, u32 command) { unsigned long flags; - int ret; + int ret, i; u32 command_reg; =20 spin_lock_irqsave(&stream_map->dart->lock, flags); =20 - writel(stream_map->sidmap[0], stream_map->dart->regs + DART_T8020_STREAM_= SELECT); + for (i =3D 0; i < BITS_TO_U32(stream_map->dart->num_streams); i++) + writel(stream_map->sidmap[i], + stream_map->dart->regs + DART_T8020_STREAM_SELECT + 4 * i); writel(command, stream_map->dart->regs + DART_T8020_STREAM_COMMAND); =20 ret =3D readl_poll_timeout_atomic( --=20 2.25.1 From nobody Sat Apr 11 02:53:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19702C64ED6 for ; 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Tue, 28 Feb 2023 15:21:57 -0500 (EST) From: Sven Peter To: Hector Martin , Sven Peter , Joerg Roedel , Will Deacon , Robin Murphy Cc: Rob Herring , Krzysztof Kozlowski , Alyssa Rosenzweig , linux-arm-kernel@lists.infradead.org, asahi@lists.linux.dev, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/4] iommu: dart: Add support for t8103 USB4 DART Date: Tue, 28 Feb 2023 21:21:32 +0100 Message-Id: <20230228202132.4919-5-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20230228202132.4919-1-sven@svenpeter.dev> References: <20230228202132.4919-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This variant of the regular t8103 DART is used for the two USB4/Thunderbolt PCIe controllers. It supports 64 instead of 16 streams which requires a slightly different MMIO layout. We also disallow bypass support since these DARTs will only ever be used for externally facing devices on the USB4 ports. Acked-by: Hector Martin Signed-off-by: Sven Peter --- drivers/iommu/apple-dart.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 7579c97a9062..b9886d40a4d1 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -81,6 +81,7 @@ #define DART_T8020_TCR_BYPASS_DAPF BIT(12) =20 #define DART_T8020_TTBR 0x200 +#define DART_T8020_USB4_TTBR 0x400 #define DART_T8020_TTBR_VALID BIT(31) #define DART_T8020_TTBR_ADDR_FIELD_SHIFT 0 #define DART_T8020_TTBR_SHIFT 12 @@ -1184,6 +1185,35 @@ static const struct apple_dart_hw apple_dart_hw_t810= 3 =3D { .ttbr_shift =3D DART_T8020_TTBR_SHIFT, .ttbr_count =3D 4, }; + +static const struct apple_dart_hw apple_dart_hw_t8103_usb4 =3D { + .type =3D DART_T8020, + .irq_handler =3D apple_dart_t8020_irq, + .invalidate_tlb =3D apple_dart_t8020_hw_invalidate_tlb, + .oas =3D 36, + .fmt =3D APPLE_DART, + .max_sid_count =3D 64, + + .enable_streams =3D DART_T8020_STREAMS_ENABLE, + .lock =3D DART_T8020_CONFIG, + .lock_bit =3D DART_T8020_CONFIG_LOCK, + + .error =3D DART_T8020_ERROR, + + .tcr =3D DART_T8020_TCR, + .tcr_enabled =3D DART_T8020_TCR_TRANSLATE_ENABLE, + .tcr_disabled =3D 0, + .tcr_bypass =3D 0, + + .ttbr =3D DART_T8020_USB4_TTBR, + .ttbr_valid =3D DART_T8020_TTBR_VALID, + .ttbr_addr_field_shift =3D DART_T8020_TTBR_ADDR_FIELD_SHIFT, + .ttbr_shift =3D DART_T8020_TTBR_SHIFT, + .ttbr_count =3D 4, + + .disable_bypass =3D true, +}; + static const struct apple_dart_hw apple_dart_hw_t6000 =3D { .type =3D DART_T6000, .irq_handler =3D apple_dart_t8020_irq, @@ -1276,6 +1306,7 @@ DEFINE_SIMPLE_DEV_PM_OPS(apple_dart_pm_ops, apple_dar= t_suspend, apple_dart_resum =20 static const struct of_device_id apple_dart_of_match[] =3D { { .compatible =3D "apple,t8103-dart", .data =3D &apple_dart_hw_t8103 }, + { .compatible =3D "apple,t8103-usb4-dart", .data =3D &apple_dart_hw_t8103= _usb4 }, { .compatible =3D "apple,t8110-dart", .data =3D &apple_dart_hw_t8110 }, { .compatible =3D "apple,t6000-dart", .data =3D &apple_dart_hw_t6000 }, {}, --=20 2.25.1