From patchwork Fri Sep 11 14:27:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sai Prakash Ranjan X-Patchwork-Id: 11772989 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 058CC618 for ; Mon, 14 Sep 2020 07:03:28 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CF19521548 for ; Mon, 14 Sep 2020 07:03:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="YiVWxAIv"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="nIZjXJDE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CF19521548 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E52486E1BB; Mon, 14 Sep 2020 07:03:06 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org X-Greylist: delayed 1129 seconds by postgrey-1.36 at gabe; Fri, 11 Sep 2020 14:46:46 UTC Received: from a27-188.smtp-out.us-west-2.amazonses.com (a27-188.smtp-out.us-west-2.amazonses.com [54.240.27.188]) by gabe.freedesktop.org (Postfix) with ESMTPS id 09D5A6E053; Fri, 11 Sep 2020 14:46:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=gbvhytky6xpx7itkhb67ktsxbiwpnxix; d=codeaurora.org; t=1599834477; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=EncBtUbW+/8e8AetwH5ax0dwE6Vqltzbyo8iHlfy/3Y=; b=YiVWxAIvVG++ddhQmEDpqLiHOQUWtpp4BuGKDcwe9pkOWYa9yib8BMDwXqmTFpLj p6dM79F5PIOixf2DFGRgdqVKC3rZ5lwRKloRzg6sD36vVK5zQB5e1OpPsmQcGlu+UYf uLvN8YuYqBrjZQgkKnxNlRXnVEbfb/w9B+mQoeEc= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=hsbnp7p3ensaochzwyq5wwmceodymuwv; d=amazonses.com; t=1599834477; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Feedback-ID; bh=EncBtUbW+/8e8AetwH5ax0dwE6Vqltzbyo8iHlfy/3Y=; b=nIZjXJDEFasnBajchIeEqMnUyrlWsc6VLzrmZoJX9KJGnO4F+L+O4TmLUoSA+Lrc eSUNs4nHhrtOJpsaFpU0+GFBqw2RmbX/kINZUHXwTjQg5lQRV4jFSKV01j0Pr4isAdI 1uBWAvr6sqm/C0FtlUxZ0FqpdqaPyzhlXkLjDSvk= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED, BAYES_00, SPF_FAIL, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 14C21C433CA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=saiprakash.ranjan@codeaurora.org From: Sai Prakash Ranjan To: Will Deacon , Robin Murphy , Joerg Roedel , Jordan Crouse , Rob Clark Subject: [PATCHv4 2/6] iommu/arm-smmu: Add domain attribute for system cache Date: Fri, 11 Sep 2020 14:27:57 +0000 Message-ID: <010101747d90d16e-da1e3c14-08fe-4b20-b448-14a1f881cc64-000000@us-west-2.amazonses.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 X-SES-Outgoing: 2020.09.11-54.240.27.188 Feedback-ID: 1.us-west-2.CZuq2qbDmUIuT3qdvXlRHZZCpfZqZ4GtG9v3VKgRyF0=:AmazonSES X-Mailman-Approved-At: Mon, 14 Sep 2020 07:03:05 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sai Prakash Ranjan , linux-arm-msm@vger.kernel.org, Akhil P Oommen , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, "Kristian H . Kristensen" , Bjorn Andersson , freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add iommu domain attribute for using system cache aka last level cache by client drivers like GPU to set right attributes for caching the hardware pagetables into the system cache. Signed-off-by: Sai Prakash Ranjan --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 17 +++++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu.h | 1 + include/linux/iommu.h | 1 + 3 files changed, 19 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index 1f06ab219819..d449c895ba16 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -789,6 +789,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain, if (smmu_domain->non_strict) pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT; + if (smmu_domain->sys_cache) + pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_SYS_CACHE; + pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain); if (!pgtbl_ops) { ret = -ENOMEM; @@ -1513,6 +1516,9 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, case DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE: *(int *)data = smmu_domain->non_strict; return 0; + case DOMAIN_ATTR_SYS_CACHE: + *((int *)data) = smmu_domain->sys_cache; + return 0; default: return -ENODEV; } @@ -1544,6 +1550,17 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, else smmu_domain->stage = ARM_SMMU_DOMAIN_S1; break; + case DOMAIN_ATTR_SYS_CACHE: + if (smmu_domain->smmu) { + ret = -EPERM; + goto out_unlock; + } + + if (*((int *)data)) + smmu_domain->sys_cache = true; + else + smmu_domain->sys_cache = false; + break; default: ret = -ENODEV; } diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h index ddf2ca4c923d..93593e164e44 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.h +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h @@ -373,6 +373,7 @@ struct arm_smmu_domain { struct mutex init_mutex; /* Protects smmu pointer */ spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */ struct iommu_domain domain; + bool sys_cache; }; struct arm_smmu_master_cfg { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index fee209efb756..a580dfe9c68d 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -118,6 +118,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, + DOMAIN_ATTR_SYS_CACHE, DOMAIN_ATTR_MAX, };