From nobody Sat Sep 21 13:57:43 2024 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 B8AC2C54EE9 for ; Mon, 19 Sep 2022 09:24:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230317AbiISJYo (ORCPT ); Mon, 19 Sep 2022 05:24:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230266AbiISJYc (ORCPT ); Mon, 19 Sep 2022 05:24:32 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E5D423B for ; Mon, 19 Sep 2022 02:24:30 -0700 (PDT) X-UUID: f0332fdc791b46e7beaf1d4f986867b5-20220919 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=1n3i963YjnjCxA997/LlkIp6gYgdi9xkWLSnlTpGK7s=; b=FEBbQ0/Pnz4r6q9zO5YXlO9Phcz1xDyYAp9NRvDJ2RUf+JD/4+F3EyxIka+Tsqs55ZkvDCzD4YL9eo+kmAaIxS1KW2LK2OqymGWYTXh70ww3phQVU6glwPvtVbt/GURRSsuwtOgiK/auv5tpYWOwC8rGl09tpYcfOKDZ4kaQyws=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.11,REQID:cd938c0e-0163-4fb2-9c43-6957a2000c45,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:90 X-CID-INFO: VERSION:1.1.11,REQID:cd938c0e-0163-4fb2-9c43-6957a2000c45,IP:0,URL :0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTIO N:quarantine,TS:90 X-CID-META: VersionHash:39a5ff1,CLOUDID:26c6225e-5ed4-4e28-8b00-66ed9f042fbd,B ulkID:220919172425LCJE5R8E,BulkQuantity:0,Recheck:0,SF:28|17|19|48|823|824 ,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL :0 X-UUID: f0332fdc791b46e7beaf1d4f986867b5-20220919 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1112873513; Mon, 19 Sep 2022 17:24:24 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Mon, 19 Sep 2022 17:24:23 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 19 Sep 2022 17:24:22 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 1/6] iommu/mediatek: Add platform_device_put for recovering the device refcnt Date: Mon, 19 Sep 2022 17:24:00 +0800 Message-ID: <20220919092405.8256-2-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add platform_device_put to match with of_find_device_by_node. Meanwhile, I add a new variable "pcommdev" which is for smi common device. Otherwise, "platform_device_put(plarbdev)" for smi-common dev may be not readable. And add a checking for whether pcommdev is NULL. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYP= E") Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 7e363b1f24df..21a8ce503a0e 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1041,7 +1041,7 @@ static int mtk_iommu_mm_dts_parse(struct device *dev,= struct component_match **m struct mtk_iommu_data *data) { struct device_node *larbnode, *smicomm_node, *smi_subcomm_node; - struct platform_device *plarbdev; + struct platform_device *plarbdev, *pcommdev; struct device_link *link; int i, larb_nr, ret; =20 @@ -1072,12 +1072,14 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m } if (!plarbdev->dev.driver) { of_node_put(larbnode); + platform_device_put(plarbdev); return -EPROBE_DEFER; } data->larb_imu[id].dev =3D &plarbdev->dev; =20 component_match_add_release(dev, match, component_release_of, component_compare_of, larbnode); + platform_device_put(plarbdev); } =20 /* Get smi-(sub)-common dev from the last larb. */ @@ -1095,12 +1097,15 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m else smicomm_node =3D smi_subcomm_node; =20 - plarbdev =3D of_find_device_by_node(smicomm_node); + pcommdev =3D of_find_device_by_node(smicomm_node); of_node_put(smicomm_node); - data->smicomm_dev =3D &plarbdev->dev; + if (!pcommdev) + return -ENODEV; + data->smicomm_dev =3D &pcommdev->dev; =20 link =3D device_link_add(data->smicomm_dev, dev, DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); + platform_device_put(pcommdev); if (!link) { dev_err(dev, "Unable to link %s.\n", dev_name(data->smicomm_dev)); return -EINVAL; --=20 2.18.0 From nobody Sat Sep 21 13:57:43 2024 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 F3F52C54EE9 for ; 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Mon, 19 Sep 2022 17:24:30 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 2/6] iommu/mediatek: Use component_match_add Date: Mon, 19 Sep 2022 17:24:01 +0800 Message-ID: <20220919092405.8256-3-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In order to simplify the error patch(avoid call of_node_put), Use component_match_add instead component_match_add_release since we are only interested in the "device" here. Then we could always call of_node_put in normal path. Strictly this is not a fixes patch, but it is a prepare for adding the error path, thus I add a Fixes tag too. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYP= E") Suggested-by: Robin Murphy Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 21a8ce503a0e..83b279432406 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1066,19 +1066,17 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m id =3D i; =20 plarbdev =3D of_find_device_by_node(larbnode); - if (!plarbdev) { - of_node_put(larbnode); + of_node_put(larbnode); + if (!plarbdev) return -ENODEV; - } + if (!plarbdev->dev.driver) { - of_node_put(larbnode); platform_device_put(plarbdev); return -EPROBE_DEFER; } data->larb_imu[id].dev =3D &plarbdev->dev; =20 - component_match_add_release(dev, match, component_release_of, - component_compare_of, larbnode); + component_match_add(dev, match, component_compare_dev, &plarbdev->dev); platform_device_put(plarbdev); } =20 --=20 2.18.0 From nobody Sat Sep 21 13:57:43 2024 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 1B484C54EE9 for ; Mon, 19 Sep 2022 09:25:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230022AbiISJZI (ORCPT ); Mon, 19 Sep 2022 05:25:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230324AbiISJYp (ORCPT ); Mon, 19 Sep 2022 05:24:45 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12004BC83 for ; Mon, 19 Sep 2022 02:24:42 -0700 (PDT) X-UUID: 2c1d1d5342ac46a6b10972e7632fa75c-20220919 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=900vz5qr65ndkLF0SOk5KwGKEz4Cus5BCuRbNd9HW7I=; b=qN6TRa7HmbB7Xvkjc5gYvUMe/PkF04BS0+bGYQ302Qjv02vHMb8ZN3YiSExf2OnJ5Ok/CZeDwZBp/gEOXoHBvNlzMcIgO+57IU5DKddQT3+GCoR4BZpX/jueDfmZiqTDfQgWSJXZDMWEVS1IbmMRAJmhQg3spn5re1yD7yNq2NA=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.11,REQID:cc54cbcb-6d63-47ef-abc0-b4b2b63d74b4,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:39a5ff1,CLOUDID:3acee2f6-6e85-48d9-afd8-0504bbfe04cb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: 2c1d1d5342ac46a6b10972e7632fa75c-20220919 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1354522134; Mon, 19 Sep 2022 17:24:39 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Mon, 19 Sep 2022 17:24:37 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 19 Sep 2022 17:24:36 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 3/6] iommu/mediatek: Add error path for loop of mm_dts_parse Date: Mon, 19 Sep 2022 17:24:02 +0800 Message-ID: <20220919092405.8256-4-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The mtk_iommu_mm_dts_parse will parse the smi larbs nodes. if the i+1 larb is parsed fail, we should put_device for the 0..i larbs. There are two places need to comment: 1) The larbid may be not linear mapping, we should loop whole the array in the error path. 2) I move this line position: "data->larb_imu[id].dev =3D &plarbdev->dev;" before "if (!plarbdev->dev.driver)", That means set data->larb_imu[id].dev before the error path. then we don't need "platform_device_put(plarbdev)" again in probe_defer case. All depend on "put_device" of the error path in error cases. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYP= E") Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 83b279432406..97b721006a47 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1053,8 +1053,10 @@ static int mtk_iommu_mm_dts_parse(struct device *dev= , struct component_match **m u32 id; =20 larbnode =3D of_parse_phandle(dev->of_node, "mediatek,larbs", i); - if (!larbnode) - return -EINVAL; + if (!larbnode) { + ret =3D -EINVAL; + goto err_larbdev_put; + } =20 if (!of_device_is_available(larbnode)) { of_node_put(larbnode); @@ -1067,14 +1069,16 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m =20 plarbdev =3D of_find_device_by_node(larbnode); of_node_put(larbnode); - if (!plarbdev) - return -ENODEV; + if (!plarbdev) { + ret =3D -ENODEV; + goto err_larbdev_put; + } + data->larb_imu[id].dev =3D &plarbdev->dev; =20 if (!plarbdev->dev.driver) { - platform_device_put(plarbdev); - return -EPROBE_DEFER; + ret =3D -EPROBE_DEFER; + goto err_larbdev_put; } - data->larb_imu[id].dev =3D &plarbdev->dev; =20 component_match_add(dev, match, component_compare_dev, &plarbdev->dev); platform_device_put(plarbdev); @@ -1109,6 +1113,15 @@ static int mtk_iommu_mm_dts_parse(struct device *dev= , struct component_match **m return -EINVAL; } return 0; + +err_larbdev_put: + /* id may be not linear mapping, loop whole the array */ + for (i =3D MTK_LARB_NR_MAX - 1; i >=3D 0; i++) { + if (!data->larb_imu[i].dev) + continue; + put_device(data->larb_imu[i].dev); + } + return ret; } =20 static int mtk_iommu_probe(struct platform_device *pdev) --=20 2.18.0 From nobody Sat Sep 21 13:57:43 2024 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 05753C54EE9 for ; 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Mon, 19 Sep 2022 17:24:44 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 4/6] iommu/mediatek: Validate number of phandles associated with "mediatek,larbs" Date: Mon, 19 Sep 2022 17:24:03 +0800 Message-ID: <20220919092405.8256-5-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Guenter Roeck Fix the smatch warnings: drivers/iommu/mtk_iommu.c:878 mtk_iommu_mm_dts_parse() error: uninitialized symbol 'larbnode'. If someone abuse the dtsi node(Don't follow the definition of dt-binding), for example "mediatek,larbs" is provided as boolean property, "larb_nr" will be zero and cause abnormal. To fix this problem and improve the code safety, add some checking for the invalid input from dtsi, e.g. checking the larb_nr/larbid valid range, and avoid "mediatek,larb-id" property conflicts in the smi-larb nodes. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYP= E") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Guenter Roeck Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 97b721006a47..01b31b09bd8d 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1048,6 +1048,8 @@ static int mtk_iommu_mm_dts_parse(struct device *dev,= struct component_match **m larb_nr =3D of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NU= LL); if (larb_nr < 0) return larb_nr; + if (larb_nr =3D=3D 0 || larb_nr > MTK_LARB_NR_MAX) + return -EINVAL; =20 for (i =3D 0; i < larb_nr; i++) { u32 id; @@ -1066,6 +1068,11 @@ static int mtk_iommu_mm_dts_parse(struct device *dev= , struct component_match **m ret =3D of_property_read_u32(larbnode, "mediatek,larb-id", &id); if (ret)/* The id is consecutive if there is no this property */ id =3D i; + if (id >=3D MTK_LARB_NR_MAX) { + of_node_put(larbnode); + ret =3D -EINVAL; + goto err_larbdev_put; + } =20 plarbdev =3D of_find_device_by_node(larbnode); of_node_put(larbnode); @@ -1073,6 +1080,11 @@ static int mtk_iommu_mm_dts_parse(struct device *dev= , struct component_match **m ret =3D -ENODEV; goto err_larbdev_put; } + if (data->larb_imu[id].dev) { + platform_device_put(plarbdev); + ret =3D -EEXIST; + goto err_larbdev_put; + } data->larb_imu[id].dev =3D &plarbdev->dev; =20 if (!plarbdev->dev.driver) { --=20 2.18.0 From nobody Sat Sep 21 13:57:43 2024 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 7BD78C54EE9 for ; Mon, 19 Sep 2022 09:25:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230319AbiISJZi (ORCPT ); Mon, 19 Sep 2022 05:25:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230313AbiISJZH (ORCPT ); Mon, 19 Sep 2022 05:25:07 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 600A924F19 for ; Mon, 19 Sep 2022 02:24:58 -0700 (PDT) X-UUID: e8fb3f1def3541e7894e213a702d33a9-20220919 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=q4q6hr9tPz4HzDjm0WRuVwaOEsMHWVBqCC3YrBT92fw=; b=Ko/uWqJBkILlmJ+WWEN1ezI5NMAAgENTm+OgBhjnWpGUuXCIgh2MZp6AmsnSML0pgEPT1khU6MOQxTEM77V7xZ4JqmpVyyiG9RZv0IGey8pqWwPfOe3TxklV9UAOybb511OzPEuvgYb3ZVHch4GIoRUzrHF63cQS8iTER6iPrzo=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.11,REQID:f0f23bf9-cd8e-41fc-bc9b-6d349cacfded,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:39a5ff1,CLOUDID:c9ca225e-5ed4-4e28-8b00-66ed9f042fbd,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: e8fb3f1def3541e7894e213a702d33a9-20220919 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1473669100; Mon, 19 Sep 2022 17:24:53 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Mon, 19 Sep 2022 17:24:51 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 19 Sep 2022 17:24:50 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 5/6] iommu/mediatek: Improve safety for mediatek,smi property in larb nodes Date: Mon, 19 Sep 2022 17:24:04 +0800 Message-ID: <20220919092405.8256-6-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" No functional change. Just improve safety from dts. All the larbs that connect to one IOMMU must connect with the same smi-common. This patch checks all the mediatek,smi property for each larb, If their mediatek,smi are different, it will return fails. Also avoid there is no available smi-larb nodes. Suggested-by: Guenter Roeck Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 53 +++++++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 16 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 01b31b09bd8d..f92b8c0bb373 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1040,7 +1040,7 @@ static const struct component_master_ops mtk_iommu_co= m_ops =3D { static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_mat= ch **match, struct mtk_iommu_data *data) { - struct device_node *larbnode, *smicomm_node, *smi_subcomm_node; + struct device_node *larbnode, *frst_avail_smicomm_node =3D NULL; struct platform_device *plarbdev, *pcommdev; struct device_link *link; int i, larb_nr, ret; @@ -1052,6 +1052,7 @@ static int mtk_iommu_mm_dts_parse(struct device *dev,= struct component_match **m return -EINVAL; =20 for (i =3D 0; i < larb_nr; i++) { + struct device_node *smicomm_node, *smi_subcomm_node; u32 id; =20 larbnode =3D of_parse_phandle(dev->of_node, "mediatek,larbs", i); @@ -1092,27 +1093,47 @@ static int mtk_iommu_mm_dts_parse(struct device *de= v, struct component_match **m goto err_larbdev_put; } =20 + /* Get smi-(sub)-common dev from the last larb. */ + smi_subcomm_node =3D of_parse_phandle(larbnode, "mediatek,smi", 0); + if (!smi_subcomm_node) { + ret =3D -EINVAL; + goto err_larbdev_put; + } + + /* + * It may have two level smi-common. the node is smi-sub-common if it + * has a new mediatek,smi property. otherwise it is smi-commmon. + */ + smicomm_node =3D of_parse_phandle(smi_subcomm_node, "mediatek,smi", 0); + if (smicomm_node) + of_node_put(smi_subcomm_node); + else + smicomm_node =3D smi_subcomm_node; + + /* + * All the larbs that connect to one IOMMU must connect with the same + * smi-common. + */ + if (!frst_avail_smicomm_node) { + frst_avail_smicomm_node =3D smicomm_node; + } else if (frst_avail_smicomm_node !=3D smicomm_node) { + dev_err(dev, "mediatek,smi property is not right @larb%d.", id); + of_node_put(smicomm_node); + ret =3D -EINVAL; + goto err_larbdev_put; + } else { + of_node_put(smicomm_node); + } + component_match_add(dev, match, component_compare_dev, &plarbdev->dev); platform_device_put(plarbdev); } =20 - /* Get smi-(sub)-common dev from the last larb. */ - smi_subcomm_node =3D of_parse_phandle(larbnode, "mediatek,smi", 0); - if (!smi_subcomm_node) + if (!frst_avail_smicomm_node) return -EINVAL; =20 - /* - * It may have two level smi-common. the node is smi-sub-common if it - * has a new mediatek,smi property. otherwise it is smi-commmon. - */ - smicomm_node =3D of_parse_phandle(smi_subcomm_node, "mediatek,smi", 0); - if (smicomm_node) - of_node_put(smi_subcomm_node); - else - smicomm_node =3D smi_subcomm_node; - - pcommdev =3D of_find_device_by_node(smicomm_node); - of_node_put(smicomm_node); + pcommdev =3D of_find_device_by_node(frst_avail_smicomm_node); + of_node_put(frst_avail_smicomm_node); if (!pcommdev) return -ENODEV; data->smicomm_dev =3D &pcommdev->dev; --=20 2.18.0 From nobody Sat Sep 21 13:57:43 2024 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 72F05C54EE9 for ; Mon, 19 Sep 2022 09:25:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229633AbiISJZx (ORCPT ); Mon, 19 Sep 2022 05:25:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230327AbiISJZJ (ORCPT ); Mon, 19 Sep 2022 05:25:09 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABDD013FA6 for ; Mon, 19 Sep 2022 02:25:00 -0700 (PDT) X-UUID: cdf5796b87a445cd86a32f8f311e7e8b-20220919 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; 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Mon, 19 Sep 2022 17:24:56 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 19 Sep 2022 17:24:55 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v5 6/6] iommu/mediatek: Remove unused "mapping" member from mtk_iommu_data Date: Mon, 19 Sep 2022 17:24:05 +0800 Message-ID: <20220919092405.8256-7-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220919092405.8256-1-yong.wu@mediatek.com> References: <20220919092405.8256-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Just remove a unused variable that only is for mtk_iommu_v1. Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Matthias Brugger --- drivers/iommu/mtk_iommu.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index f92b8c0bb373..eb3ace99beff 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -221,10 +221,7 @@ struct mtk_iommu_data { struct device *smicomm_dev; =20 struct mtk_iommu_bank_data *bank; - - struct dma_iommu_mapping *mapping; /* For mtk_iommu_v1.c */ struct regmap *pericfg; - struct mutex mutex; /* Protect m4u_group/m4u_dom above */ =20 /* --=20 2.18.0