From patchwork Thu Aug 29 22:47:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Reddy X-Patchwork-Id: 1155545 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=nvidia.com header.i=@nvidia.com header.b="MKlJ6W8+"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46KHlR50yxz9sNp for ; Fri, 30 Aug 2019 08:46:11 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728601AbfH2WqH (ORCPT ); Thu, 29 Aug 2019 18:46:07 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:9635 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727907AbfH2Wpo (ORCPT ); Thu, 29 Aug 2019 18:45:44 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 29 Aug 2019 15:45:44 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 29 Aug 2019 15:45:42 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 29 Aug 2019 15:45:42 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 29 Aug 2019 22:45:42 +0000 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 29 Aug 2019 22:45:42 +0000 Received: from vdumpa-ubuntu.nvidia.com (Not Verified[172.17.173.140]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Thu, 29 Aug 2019 15:45:42 -0700 From: Krishna Reddy CC: , , , , , , , , , , , , , , Krishna Reddy Subject: [PATCH 1/7] iommu/arm-smmu: add Nvidia SMMUv2 implementation Date: Thu, 29 Aug 2019 15:47:01 -0700 Message-ID: <1567118827-26358-2-git-send-email-vdumpa@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1567118827-26358-1-git-send-email-vdumpa@nvidia.com> References: <1567118827-26358-1-git-send-email-vdumpa@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1567118744; bh=sYUobdUNL+/HqQeY66knX+3kptunAwB14i4cE6aqGZ4=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=MKlJ6W8+IfrtPCVtFmdB02/bRW9w60dMSsZxIjs9PE4pUmsF2CTmZs7gMSeimGHga 4NcQjxcxv1WIh1m8ttqSTxp4DS17c/8Ns4b8ltUeDRjvsqPO5m0ylu2gBxbtrbkDHa x0m9rAerzbyPMlC7G1sKMv1oKRH6rZ2Hx2l3c8apN5BXHbPjjudUHV05sUxAAWo7P4 gaHdx8qN/owbB4MtNHb8FX+MLZhVBmWXr7owjRKJbSWas0LpdrqLSeeztwjYOgMBZq HUwnQBFe6ABHgD60xNqGIDag09JoZe378p/3TUjacIBHSNFhcCQ1Sd4j0dUyYMSpAA sxEQTzYU22Yvw== To: unlisted-recipients:; (no To-header on input) Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Add Nvidia SMMUv2 implementation and model info. Signed-off-by: Krishna Reddy --- MAINTAINERS | 2 + drivers/iommu/Makefile | 2 +- drivers/iommu/arm-smmu-impl.c | 2 + drivers/iommu/arm-smmu-nvidia.c | 97 +++++++++++++++++++++++++++++++++++++++++ drivers/iommu/arm-smmu.c | 2 + drivers/iommu/arm-smmu.h | 2 + 6 files changed, 106 insertions(+), 1 deletion(-) create mode 100644 drivers/iommu/arm-smmu-nvidia.c diff --git a/MAINTAINERS b/MAINTAINERS index 289fb06..b9d59e51 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15785,9 +15785,11 @@ F: drivers/i2c/busses/i2c-tegra.c TEGRA IOMMU DRIVERS M: Thierry Reding +R: Krishna Reddy L: linux-tegra@vger.kernel.org S: Supported F: drivers/iommu/tegra* +F: drivers/iommu/arm-smmu-nvidia.c TEGRA KBC DRIVER M: Laxman Dewangan diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index a2729aa..7f5489e 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -13,7 +13,7 @@ obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o obj-$(CONFIG_AMD_IOMMU_DEBUGFS) += amd_iommu_debugfs.o obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o -obj-$(CONFIG_ARM_SMMU) += arm-smmu.o arm-smmu-impl.o +obj-$(CONFIG_ARM_SMMU) += arm-smmu.o arm-smmu-impl.o arm-smmu-nvidia.o obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o obj-$(CONFIG_DMAR_TABLE) += dmar.o obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o intel-pasid.o diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c index 5c87a38..e5e595f 100644 --- a/drivers/iommu/arm-smmu-impl.c +++ b/drivers/iommu/arm-smmu-impl.c @@ -162,6 +162,8 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu) break; case CAVIUM_SMMUV2: return cavium_smmu_impl_init(smmu); + case NVIDIA_SMMUV2: + return nvidia_smmu_impl_init(smmu); default: break; } diff --git a/drivers/iommu/arm-smmu-nvidia.c b/drivers/iommu/arm-smmu-nvidia.c new file mode 100644 index 0000000..d93ceda --- /dev/null +++ b/drivers/iommu/arm-smmu-nvidia.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Nvidia ARM SMMU v2 implementation quirks +// Copyright (C) 2019 NVIDIA CORPORATION. All rights reserved. + +#define pr_fmt(fmt) "nvidia-smmu: " fmt + +#include +#include +#include +#include +#include + +#include "arm-smmu.h" + +#define NUM_SMMU_INSTANCES 3 + +struct nvidia_smmu { + struct arm_smmu_device smmu; + int num_inst; + void __iomem *bases[NUM_SMMU_INSTANCES]; +}; + +#define to_nsmmu(s) container_of(s, struct nvidia_smmu, smmu) + +#define nsmmu_page(smmu, inst, page) \ + (((inst) ? to_nsmmu(smmu)->bases[(inst)] : smmu->base) + \ + ((page) << smmu->pgshift)) + +static u32 nsmmu_read_reg(struct arm_smmu_device *smmu, + int page, int offset) +{ + return readl_relaxed(nsmmu_page(smmu, 0, page) + offset); +} + +static void nsmmu_write_reg(struct arm_smmu_device *smmu, + int page, int offset, u32 val) +{ + int i; + + for (i = 0; i < to_nsmmu(smmu)->num_inst; i++) + writel_relaxed(val, nsmmu_page(smmu, i, page) + offset); +} + +static u64 nsmmu_read_reg64(struct arm_smmu_device *smmu, + int page, int offset) +{ + return readq_relaxed(nsmmu_page(smmu, 0, page) + offset); +} + +static void nsmmu_write_reg64(struct arm_smmu_device *smmu, + int page, int offset, u64 val) +{ + int i; + + for (i = 0; i < to_nsmmu(smmu)->num_inst; i++) + writeq_relaxed(val, nsmmu_page(smmu, i, page) + offset); +} + +static const struct arm_smmu_impl nsmmu_impl = { + .read_reg = nsmmu_read_reg, + .write_reg = nsmmu_write_reg, + .read_reg64 = nsmmu_read_reg64, + .write_reg64 = nsmmu_write_reg64, +}; + +struct arm_smmu_device *nvidia_smmu_impl_init(struct arm_smmu_device *smmu) +{ + int i; + struct nvidia_smmu *nsmmu; + struct resource *res; + struct device *dev = smmu->dev; + struct platform_device *pdev = to_platform_device(smmu->dev); + + nsmmu = devm_kzalloc(smmu->dev, sizeof(*nsmmu), GFP_KERNEL); + if (!nsmmu) + return ERR_PTR(-ENOMEM); + + nsmmu->smmu = *smmu; + /* Instance 0 is ioremapped by arm-smmu.c */ + nsmmu->num_inst = 1; + + for (i = 1; i < NUM_SMMU_INSTANCES; i++) { + res = platform_get_resource(pdev, IORESOURCE_MEM, i); + if (!res) + break; + nsmmu->bases[i] = devm_ioremap_resource(dev, res); + if (IS_ERR(nsmmu->bases[i])) + return (struct arm_smmu_device *)nsmmu->bases[i]; + nsmmu->num_inst++; + } + + nsmmu->smmu.impl = &nsmmu_impl; + devm_kfree(smmu->dev, smmu); + pr_info("Nvidia SMMUv2, Instances=%d\n", nsmmu->num_inst); + + return &nsmmu->smmu; +} diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 5b93c79..46e1641 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1871,6 +1871,7 @@ ARM_SMMU_MATCH_DATA(arm_mmu401, ARM_SMMU_V1_64K, GENERIC_SMMU); ARM_SMMU_MATCH_DATA(arm_mmu500, ARM_SMMU_V2, ARM_MMU500); ARM_SMMU_MATCH_DATA(cavium_smmuv2, ARM_SMMU_V2, CAVIUM_SMMUV2); ARM_SMMU_MATCH_DATA(qcom_smmuv2, ARM_SMMU_V2, QCOM_SMMUV2); +ARM_SMMU_MATCH_DATA(nvidia_smmuv2, ARM_SMMU_V2, NVIDIA_SMMUV2); static const struct of_device_id arm_smmu_of_match[] = { { .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 }, @@ -1880,6 +1881,7 @@ static const struct of_device_id arm_smmu_of_match[] = { { .compatible = "arm,mmu-500", .data = &arm_mmu500 }, { .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 }, { .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 }, + { .compatible = "nvidia,smmu-v2", .data = &nvidia_smmuv2 }, { }, }; diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h index b19b6ca..9645bf1 100644 --- a/drivers/iommu/arm-smmu.h +++ b/drivers/iommu/arm-smmu.h @@ -220,6 +220,7 @@ enum arm_smmu_implementation { ARM_MMU500, CAVIUM_SMMUV2, QCOM_SMMUV2, + NVIDIA_SMMUV2, }; struct arm_smmu_device { @@ -398,5 +399,6 @@ static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, arm_smmu_writeq((s), ARM_SMMU_CB((s), (n)), (o), (v)) struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu); +struct arm_smmu_device *nvidia_smmu_impl_init(struct arm_smmu_device *smmu); #endif /* _ARM_SMMU_H */