From patchwork Thu Nov 30 01:10:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 748738 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="IQjX7i/l" Received: from NAM04-DM6-obe.outbound.protection.outlook.com (mail-dm6nam04on2060.outbound.protection.outlook.com [40.107.102.60]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA4F010A; Wed, 29 Nov 2023 17:10:46 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HNwgJ9M0f7NHybi2UuKUbLbc/hViKCX0JdfFD4LKzmJEg6s+LP8Y9AZUuKbRNOl7yDPWwcHU1nLAi0/9wk0tqyTyShrSZGfs8teEaS7F1gURJZdlLOLIxtTtOh82QtnTbjnjD8KSdefGkuKXVvmUFcitXnfPXDyH5s1mRVgVOpADG1fzrKOXwFmUjV1EaA3NjT1ALgL2VE17RJaf4XiAMIEW9RH6DOynB3ERhCNusPdvYlWj18Eaoajekj97s/SDd2J9Hsta+77QUj163kPqcUhz8Q653OXSApzTaLoNj2XfOMaxNQVIiGGf3vcTqpEeH5jidNlKKhggxHqfm7VYiQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Z7r48HdaFD2m3FjojzyB3owyxRtlpeFZA78h2PReCEE=; b=k7uIMreIE5QccI3QJKd8el4wYJ+423L2GNMZq/rj2mSAo6QgcxrgtW+wu/JZTPPlh5jH+GqwImX+Xn7Vr/Y0kIZD2/DIfPE92/5NtSLiBVzNy7gjXAdOaRLoDdlVaTNphnhRdmWous/Z7L3BzoF0THBSBY2bP/uvArmeMtrdCUdBRABQqBEhM6/UTG2A2FMwIHQZAlA/SmKzczDzEzh/RmCls2f77HkdECDH2KeZiaSfyMDqhoPpikcEeHwwg4Wn+hjFCdzL78tNJrvDR1vRE1HZBQQ8i2Ujfq2QjH+BHZkk+E02fAo2okPZaaOpin8/XG119qtPPKD1PE5UxJQvAQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Z7r48HdaFD2m3FjojzyB3owyxRtlpeFZA78h2PReCEE=; b=IQjX7i/lv+Z8mK2447t1yUT/Sna9CuJqhyRNXlZjIfjeLlhVKevGVzk0bHpEF3wADhFGrWz1o/yO3ZAD5UFOVqVPDZo/CnvwdGhSvmEqFrtdE+JLCBD7Y27mzk6jfrkHWlyyvG3eUusL2mY+GGR6Hbcl0OkA9YAakzZw1Nmffbhat/ylH+gIV5wpkjz5IB6K+Us4L9ZHTsHint02NxqaJYuXvJ5MKzBADQwNLKCEn58whZ3YGCX8nNUXOcwP2yssEwwn1+5VpDLOG5/aVaplgBIXv6VBHka0k3F3rnXYdVdNB52CYIJUVxe3N9OhindYi9JY7B0MhZbmFHVXSQTs5Q== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by DS0PR12MB7607.namprd12.prod.outlook.com (2603:10b6:8:13f::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7046.22; Thu, 30 Nov 2023 01:10:40 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::60d4:c1e3:e1aa:8f93]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::60d4:c1e3:e1aa:8f93%4]) with mapi id 15.20.7046.015; Thu, 30 Nov 2023 01:10:40 +0000 From: Jason Gunthorpe To: acpica-devel@lists.linux.dev, Andy Gross , Alim Akhtar , Alyssa Rosenzweig , Bjorn Andersson , AngeloGioacchino Del Regno , asahi@lists.linux.dev, Baolin Wang , devicetree@vger.kernel.org, Frank Rowand , Hanjun Guo , "Gustavo A. R. Silva" , Heiko Stuebner , iommu@lists.linux.dev, Jean-Philippe Brucker , Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kees Cook , Konrad Dybcio , Krzysztof Kozlowski , Len Brown , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Lorenzo Pieralisi , Marek Szyprowski , Hector Martin , Matthias Brugger , Orson Zhai , "Rafael J. Wysocki" , Rob Clark , Robert Moore , Rob Herring , Robin Murphy , Samuel Holland , Sudeep Holla , Sven Peter , Thierry Reding , Krishna Reddy , virtualization@lists.linux.dev, Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang Cc: =?utf-8?q?Andr=C3=A9_Draszik?= , patches@lists.linux.dev Subject: [PATCH 05/30] iommu: Add iommu_probe_info Date: Wed, 29 Nov 2023 21:10:12 -0400 Message-ID: <5-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com> In-Reply-To: <0-v1-f82a05539a64+5042-iommu_fwspec_p2_jgg@nvidia.com> References: X-ClientProxiedBy: SN1PR12CA0106.namprd12.prod.outlook.com (2603:10b6:802:21::41) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|DS0PR12MB7607:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f2d4ae6-9622-4cea-e3f7-08dbf1412a4d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:LV2PR12MB5869.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230031)(396003)(39860400002)(346002)(136003)(366004)(376002)(230922051799003)(186009)(451199024)(64100799003)(1800799012)(38100700002)(202311291699003)(83380400001)(1191002)(5660300002)(110136005)(2906002)(86362001)(4326008)(8676002)(8936002)(66556008)(7366002)(7406005)(7416002)(66476007)(66946007)(6486002)(478600001)(6666004)(316002)(36756003)(6506007)(41300700001)(6512007)(921008)(26005)(2616005)(4216001); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f2d4ae6-9622-4cea-e3f7-08dbf1412a4d X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2023 01:10:39.0035 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: xrLki78ZDAKoF/Un4eAP9aiZ8Zf66eXHu3kHgx7W0YNmcQQ64OceHRTRzbybAF6o X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7607 This is a stack structure that is passed around all the parts of probe to allow them to exchange data. With the new design this will be a place for the FW logic to cache data to avoid reparsing and a to convey the currently active call path for probe while we work on restructuring parts of it. Place this in a new header "iommu-driver.h" which is intended to help isolate APIs that are only for use by the drivers away from the consumers of the IOMMU API. Signed-off-by: Jason Gunthorpe --- drivers/acpi/scan.c | 7 +++++- drivers/iommu/iommu.c | 42 ++++++++++++++++++++++++++---------- drivers/iommu/of_iommu.c | 6 +++++- include/linux/iommu-driver.h | 25 +++++++++++++++++++++ include/linux/iommu.h | 3 +++ 5 files changed, 70 insertions(+), 13 deletions(-) create mode 100644 include/linux/iommu-driver.h diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 340ba720c72129..9c13df632aa5e0 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1543,6 +1543,8 @@ int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map) } #ifdef CONFIG_IOMMU_API +#include + int acpi_iommu_fwspec_init(struct device *dev, u32 id, struct fwnode_handle *fwnode, const struct iommu_ops *ops) @@ -1566,6 +1568,9 @@ static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { int err; const struct iommu_ops *ops; + struct iommu_probe_info pinf = { + .dev = dev, + }; /* Serialise to make dev->iommu stable under our potential fwspec */ mutex_lock(&iommu_probe_device_lock); @@ -1589,7 +1594,7 @@ static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) * iommu_probe_device() call for dev, replay it to get things in order. */ if (!err && dev->bus) - err = iommu_probe_device(dev); + err = iommu_probe_device_pinf(&pinf); /* Ignore all other errors apart from EPROBE_DEFER */ if (err == -EPROBE_DEFER) { diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9557c2ec08d915..76b245973cfafc 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -399,8 +400,10 @@ EXPORT_SYMBOL_GPL(dev_iommu_priv_set); * Init the dev->iommu and dev->iommu_group in the struct device and get the * driver probed */ -static int iommu_init_device(struct device *dev, const struct iommu_ops *ops) +static int iommu_init_device(struct iommu_probe_info *pinf, + const struct iommu_ops *ops) { + struct device *dev = pinf->dev; struct iommu_device *iommu_dev; struct iommu_group *group; int ret; @@ -413,7 +416,10 @@ static int iommu_init_device(struct device *dev, const struct iommu_ops *ops) goto err_free; } - iommu_dev = ops->probe_device(dev); + if (ops->probe_device_pinf) + iommu_dev = ops->probe_device_pinf(pinf); + else + iommu_dev = ops->probe_device(dev); if (IS_ERR(iommu_dev)) { ret = PTR_ERR(iommu_dev); goto err_module_put; @@ -496,8 +502,9 @@ static void iommu_deinit_device(struct device *dev) DEFINE_MUTEX(iommu_probe_device_lock); -static int __iommu_probe_device(struct device *dev, struct list_head *group_list) +static int __iommu_probe_device(struct iommu_probe_info *pinf) { + struct device *dev = pinf->dev; const struct iommu_ops *ops; struct iommu_fwspec *fwspec; struct iommu_group *group; @@ -533,7 +540,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list if (dev->iommu_group) return 0; - ret = iommu_init_device(dev, ops); + ret = iommu_init_device(pinf, ops); if (ret) return ret; @@ -557,7 +564,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list ret = __iommu_device_set_domain(group, dev, group->domain, 0); if (ret) goto err_remove_gdev; - } else if (!group->default_domain && !group_list) { + } else if (!group->default_domain && !pinf->defer_setup) { ret = iommu_setup_default_domain(group, 0); if (ret) goto err_remove_gdev; @@ -568,7 +575,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list * that need further setup. */ if (list_empty(&group->entry)) - list_add_tail(&group->entry, group_list); + list_add_tail(&group->entry, pinf->deferred_group_list); } mutex_unlock(&group->mutex); @@ -588,13 +595,14 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list return ret; } -int iommu_probe_device(struct device *dev) +int iommu_probe_device_pinf(struct iommu_probe_info *pinf) { + struct device *dev = pinf->dev; const struct iommu_ops *ops; int ret; mutex_lock(&iommu_probe_device_lock); - ret = __iommu_probe_device(dev, NULL); + ret = __iommu_probe_device(pinf); mutex_unlock(&iommu_probe_device_lock); if (ret) return ret; @@ -606,6 +614,13 @@ int iommu_probe_device(struct device *dev) return 0; } +int iommu_probe_device(struct device *dev) +{ + struct iommu_probe_info pinf = {.dev = dev}; + + return iommu_probe_device_pinf(&pinf); +} + static void __iommu_group_free_device(struct iommu_group *group, struct group_device *grp_dev) { @@ -1830,11 +1845,12 @@ struct iommu_domain *iommu_group_default_domain(struct iommu_group *group) static int probe_iommu_group(struct device *dev, void *data) { - struct list_head *group_list = data; + struct iommu_probe_info *pinf = data; int ret; + pinf->dev = dev; mutex_lock(&iommu_probe_device_lock); - ret = __iommu_probe_device(dev, group_list); + ret = __iommu_probe_device(pinf); mutex_unlock(&iommu_probe_device_lock); if (ret == -ENODEV) ret = 0; @@ -1977,9 +1993,13 @@ int bus_iommu_probe(const struct bus_type *bus) { struct iommu_group *group, *next; LIST_HEAD(group_list); + struct iommu_probe_info pinf = { + .deferred_group_list = &group_list, + .defer_setup = true, + }; int ret; - ret = bus_for_each_dev(bus, NULL, &group_list, probe_iommu_group); + ret = bus_for_each_dev(bus, NULL, &pinf, probe_iommu_group); if (ret) return ret; diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 3d4580f1fbb378..fb743ddd239e0b 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -139,6 +140,9 @@ static int of_iommu_for_each_id(struct device *dev, int of_iommu_configure(struct device *dev, struct device_node *master_np, const u32 *id) { + struct iommu_probe_info pinf = { + .dev = dev, + }; struct iommu_fwspec *fwspec; int err; @@ -167,7 +171,7 @@ int of_iommu_configure(struct device *dev, struct device_node *master_np, if (err) goto err_log; - err = iommu_probe_device(dev); + err = iommu_probe_device_pinf(&pinf); if (err) goto err_log; return 0; diff --git a/include/linux/iommu-driver.h b/include/linux/iommu-driver.h new file mode 100644 index 00000000000000..b85c9f15cf478b --- /dev/null +++ b/include/linux/iommu-driver.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES + * + * This file should ONLY be included by iommu drivers. These API + * calls are NOT to be used generally. + */ +#ifndef __LINUX_IOMMU_DRIVER_H +#define __LINUX_IOMMU_DRIVER_H + +#ifndef CONFIG_IOMMU_API +#error "CONFIG_IOMMU_API is not set, should this header be included?" +#endif + +#include + +struct iommu_probe_info { + struct device *dev; + struct list_head *deferred_group_list; + bool defer_setup : 1; +}; + +int iommu_probe_device_pinf(struct iommu_probe_info *pinf); + +#endif diff --git a/include/linux/iommu.h b/include/linux/iommu.h index c24933a1d0d643..cf578b8e0b59a4 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -43,6 +43,7 @@ struct notifier_block; struct iommu_sva; struct iommu_fault_event; struct iommu_dma_cookie; +struct iommu_probe_info; /* iommu fault flags */ #define IOMMU_FAULT_READ 0x0 @@ -347,6 +348,7 @@ static inline int __iommu_copy_struct_from_user( * @domain_alloc_paging: Allocate an iommu_domain that can be used for * UNMANAGED, DMA, and DMA_FQ domain types. * @probe_device: Add device to iommu driver handling + * @probe_device_pinf: New API for probe_device * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU * group and attached to the groups domain @@ -388,6 +390,7 @@ struct iommu_ops { struct iommu_domain *(*domain_alloc_paging)(struct device *dev); struct iommu_device *(*probe_device)(struct device *dev); + struct iommu_device *(*probe_device_pinf)(struct iommu_probe_info *pinf); void (*release_device)(struct device *dev); void (*probe_finalize)(struct device *dev); struct iommu_group *(*device_group)(struct device *dev);