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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 23/30] iommu/viot: Add iommu_viot_get_single_iommu() Date: Wed, 29 Nov 2023 21:10:30 -0400 Message-ID: <23-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: SN6PR08CA0022.namprd08.prod.outlook.com (2603:10b6:805:66::35) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|PH0PR12MB5484:EE_ X-MS-Office365-Filtering-Correlation-Id: 22d41282-ade7-4f6e-da64-08dbf1412b3c 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)(366004)(346002)(136003)(396003)(39860400002)(376002)(230922051799003)(451199024)(1800799012)(186009)(64100799003)(1191002)(8936002)(110136005)(8676002)(316002)(66556008)(4326008)(86362001)(66476007)(6486002)(478600001)(66946007)(41300700001)(36756003)(921008)(7416002)(7366002)(2906002)(7406005)(5660300002)(38100700002)(2616005)(6512007)(6506007)(6666004)(83380400001)(26005)(202311291699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: db4P0KPYS+8E+xzoxKDLUd3iPFwRqT+I9RIQsox54u7ajxrminkGT4Po5eV8OHE3Bcxm1wg48v24Oa7Srr5QECWtQ/QuaALN9hIR52TI0pB0dIMQ3opN+N4gGiOYasYXArQ3/75FQNCD6+Dvxo1Nfv4h9eCU7lLrBoArSCgi90nbGor9bSRwC6EwbrCmb45ILpHeORA/GCO89yY5xpuiCnvywlY/rVuj8TbM0yD29aLJCWlLt/O/DxQmq0hO9TIPfkyN7WSEXYShu3Xs7TjdIgXf6Lh31/pW7xh+zkGfoFQNFWLNKZg8ohrbFoz8nwExW/VTanvfim7j94wMj8Tg2qfUplKuHjLN1CNWUchDsxAISnaL9womVz9q+1WtShngbHI2vstOHVJWi3YwGslAQOS3qGgjuty9sjrBef5F4kivpflsS/X235CpA2coJBCmcmPLbL9bueEy8z+PBYycnpLH+FBthsX4Gug0XOcuAA21/WnTwTFYzSDgQ34Tf1J92h75PLwfvfruLPtWHfo7jSeM6ri+yjXDP7nTV3IMjpRinsbyBjfILNXcKwbYtCRSRkaRi6CFK1d+bioQiE55rl+MadUf3SGSXL437QUZCJmJmbHIjITOLJbzET7rk4yGFdpTzDiNTU7lHy1GQ/Gd0cTPRvtJc7srlM3yII0HUPTpIVyKQc8pRGR9aOxnETUWdDGdGGNNb4/ppwFUvPyTNZSLgtP5mapQRC9U+r2/DkfWIK+3R9eIjJL24iFT3uSbKXDaU+jpi9nlbbz72Sq/uKS3rLnlajMWf04QuPdis+FCwoPcq9i+X/eSdhNezOX7mXJ+Gc3bsFFTwEiNXU4FVenfjZO+dffO/Eq9wYG9e2eYIDWjJPOsMOQuPPo6eyk71Ovu/uDmIMxwmc5ONDcbVOwQVhu0eht+bdkFZhCgAQrEsXn3HL2r0efV//GMiy6GMrs7iOc/hQc4DTc4sfVk/4GIu66Clm28VEyOMYpLYkqmitSF3su9YZEN0TztJiTApufKKhzeYvE3SYpHj8XpWb8uDo99ar32swu147JmzgREuwm7GUNOKALXaFemdjN4YZk1Sc/rdDYJAqzFTkWtlzNMlFb9fyx0qN912l9BSonp+9/DjDQ9ufifHD+YivOCoQGJ/J1Epf7KtZQRCxHf+VXZGTitLptxrSdwiaYrYFdbjmhN7Q0F1fQZdxz306Mb6xND3PUdILOkOcNIHFWWi5LLvza1ZctzWH13QPajVDygWQtBlY9CdgUyaKlPL+Zm/68zMWoqjXMefXdL2qxZbtEOfw6ekWr/m+tT2sxzT/nGFlWQWDqALwJfL3sFLrsyOjQml2gd0X5eC2nMKr3j/XjyA3bTei3znMPsVjFCRiemZeMaizbPiHLBzExmyV1co+Av+QoPDw8g5KupGhsXQfsalOjBEqhv8t6NAn2OLGhXaHogYakFKiXbrfVwXkz4gUHLxEqzobCKD0LdPVXvM/+CnARXpTpjT0DCteKZjUyf+6lxg//SzorSt9VV0MKNza4M4yEwYh5gUvusktaU/wx6Fs6kFZxzizF6cFoRtyLj+ZRTC+oT0vk3XkCUOHZE X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 22d41282-ade7-4f6e-da64-08dbf1412b3c X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2023 01:10:40.5225 (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: 33NPhtelYllkoQCYFic3Jpwc/yPXINMej/xnKpzw+033M/3F2PXpsGOi+A0YlHle X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB5484 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231129_171100_577463_63F14C64 X-CRM114-Status: GOOD ( 20.54 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org This is the ACPI VIOT version like iommu_of_get_single_iommu(). It parses the ACPI table, confirms all entries points to a single iommu_driver and then returns a pointer to it. Also cache the u32 id list in the iommu_probe_info and provide a getter function which re-parses in case we overflow the cache. Signed-off-by: Jason Gunthorpe --- drivers/acpi/scan.c | 1 + drivers/iommu/Makefile | 1 + drivers/iommu/viot_iommu.c | 70 ++++++++++++++++++++++++++++++++++++ include/linux/iommu-driver.h | 25 +++++++++++++ 4 files changed, 97 insertions(+) create mode 100644 drivers/iommu/viot_iommu.c diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index de36299c3b75bf..9ec01196573b6e 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1571,6 +1571,7 @@ static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) struct iommu_probe_info pinf = { .dev = dev, .is_dma_configure = true, + .is_acpi = true, }; /* Serialise to make dev->iommu stable under our potential fwspec */ diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index 95ad9dbfbda022..9c35b106cecb2e 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_IOMMU_IO_PGTABLE_LPAE) += io-pgtable-arm.o obj-$(CONFIG_IOMMU_IO_PGTABLE_DART) += io-pgtable-dart.o obj-$(CONFIG_IOMMU_IOVA) += iova.o obj-$(CONFIG_OF_IOMMU) += of_iommu.o +obj-$(CONFIG_ACPI_VIOT) += viot_iommu.o obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o obj-$(CONFIG_IRQ_REMAP) += irq_remapping.o diff --git a/drivers/iommu/viot_iommu.c b/drivers/iommu/viot_iommu.c new file mode 100644 index 00000000000000..e35bd4099e6c6a --- /dev/null +++ b/drivers/iommu/viot_iommu.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES + */ +#include +#include +#include + +struct parse_info { + struct iommu_probe_info *pinf; + const struct iommu_ops *ops; + u32 *ids; +}; + +static int parse_single_iommu(struct viot_iommu *viommu, u32 epid, void *_info) +{ + struct fwnode_handle *fwnode = viommu->fwnode; + struct parse_info *info = _info; + struct iommu_probe_info *pinf = info->pinf; + struct iommu_device *iommu; + + /* We're not translating ourself */ + if (device_match_fwnode(pinf->dev, fwnode)) + return -ENODEV; + + iommu = iommu_device_from_fwnode_pinf(pinf, info->ops, fwnode); + if (IS_ERR(iommu)) { + if (!IS_ENABLED(CONFIG_VIRTIO_IOMMU) && + iommu == ERR_PTR(-EPROBE_DEFER)) + return -ENODEV; + return PTR_ERR(iommu); + } + iommu_fw_cache_id(pinf, epid); + return 0; +} + +static int parse_read_ids(struct viot_iommu *viommu, u32 epid, void *_info) +{ + struct parse_info *info = _info; + + *info->ids = epid; + (*info->ids)++; + return 0; +} + +static int viot_get_u32_ids(struct iommu_probe_info *pinf, u32 *ids) +{ + struct parse_info info = { .pinf = pinf, .ids = ids }; + + return viot_iommu_for_each_id(pinf->dev, parse_read_ids, &info); +} + +struct iommu_device * +__iommu_viot_get_single_iommu(struct iommu_probe_info *pinf, + const struct iommu_ops *ops) +{ + struct parse_info info = { .pinf = pinf, .ops = ops }; + int err; + + if (!pinf->is_dma_configure || !pinf->is_acpi) + return ERR_PTR(-ENODEV); + + iommu_fw_clear_cache(pinf); + err = viot_iommu_for_each_id(pinf->dev, parse_single_iommu, &info); + if (err) + return ERR_PTR(err); + pinf->get_u32_ids = viot_get_u32_ids; + return iommu_fw_finish_get_single(pinf); +} +EXPORT_SYMBOL(__iommu_viot_get_single_iommu); diff --git a/include/linux/iommu-driver.h b/include/linux/iommu-driver.h index 632c7b4a389abe..ce0ba1f35bb5dc 100644 --- a/include/linux/iommu-driver.h +++ b/include/linux/iommu-driver.h @@ -45,6 +45,7 @@ struct iommu_probe_info { u32 cached_ids[8]; bool defer_setup : 1; bool is_dma_configure : 1; + bool is_acpi : 1; bool cached_single_iommu : 1; }; @@ -188,4 +189,28 @@ static inline int iommu_dummy_of_xlate(struct device *dev, return 0; } +#define __iommu_first(a, b) \ + ({ \ + struct iommu_device *a_dev = a; \ + a_dev != ERR_PTR(-ENODEV) ? a_dev : (b); \ + }) + +#if IS_ENABLED(CONFIG_ACPI_VIOT) +struct iommu_device * +__iommu_viot_get_single_iommu(struct iommu_probe_info *pinf, + const struct iommu_ops *ops); +#else +static inline struct iommu_device * +__iommu_viot_get_single_iommu(struct iommu_probe_info *pinf, + const struct iommu_ops *ops) +{ + return ERR_PTR(-ENODEV); +} +#endif +#define iommu_viot_get_single_iommu(pinf, ops, drv_struct, member) \ + container_of_err( \ + __iommu_first(__iommu_viot_get_single_iommu(pinf, ops), \ + __iommu_of_get_single_iommu(pinf, ops, -1)), \ + drv_struct, member) + #endif