From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.0 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, URIBL_RED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B0F8C4320A for ; Fri, 23 Jul 2021 17:02:07 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 0425B60EB4 for ; Fri, 23 Jul 2021 17:02:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0425B60EB4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id AC7C960BE1; Fri, 23 Jul 2021 17:02:06 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0HNfZLXy-LIu; Fri, 23 Jul 2021 17:02:05 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id 90A65608EF; Fri, 23 Jul 2021 17:02:05 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 6E0B2C001A; Fri, 23 Jul 2021 17:02:05 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id E9C55C000E for ; Fri, 23 Jul 2021 17:02:03 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id CCB6E83AE9 for ; Fri, 23 Jul 2021 17:02:03 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp1.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PEMg_a-eNGF1 for ; Fri, 23 Jul 2021 17:02:03 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by smtp1.osuosl.org (Postfix) with ESMTPS id 59D5983440 for ; Fri, 23 Jul 2021 17:02:03 +0000 (UTC) Received: by mail-pj1-x1036.google.com with SMTP id k4-20020a17090a5144b02901731c776526so9777624pjm.4 for ; Fri, 23 Jul 2021 10:02:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZOtpaC4Ypd4T1gRyw7mWdmcY15YhrZKpr6JIl6t/8bQ=; b=DC17T2un6ipQQvJOy8tv7AwJ0k2o8iKNJCWM3GlUdJyi3ViAzs8PfVaGfRPrdTGGfW sOz6RCYKNpWU5OtE42KYVnKqz2U/14IvIz7lumRkfDzbVy0t1foQkumNpydjv2C2xL2d 8Ffv00Q5o+cSau/WPxWnzb18hsPH16g7tZDAU7kKdr2+lbHbZIGGM3c24p9ItsxPdkq3 zcU8BkQ1+3yQEm6pWkHrgloHlS0XT2d6bUhumkiKhJZ9pw4P5zjJIagNc1USmAaTg5S6 /uhFj38bQAb596dOHrqc5BzN0RU1W6stdTDxEK7wrAD1AhpJ8HAFT+Y5gubCv2c8GUjT U3sA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZOtpaC4Ypd4T1gRyw7mWdmcY15YhrZKpr6JIl6t/8bQ=; b=m/P96uMWoDzUswnQAxmT+JURovykJchQ3P8Z+bl/UzYc0oFo3IPUZJ6UDKhoPrt/hP tIxyChk///w+0GHFJ2q905JOa+1Cw9NtWiZWkFt2WDmLNCKAhvqpiZ6H+QrMaf8W29cp WdZFNlw3yut7RNGZFqyLdbFxsjdsXTwt7C0EBaaoj1IFSB/TAwV4CPXtplaOc2/lm1wa 0j2fHDGRnOKmgbjqrH5jgs4QulSvwoTfPYIHsf/UKO1UQS6sQo/kgdZm8Ut2RbCeXmTP YnILnzrteCwe7I+Z25FEjmmdTCtUfCUVZ+bQUg75QHv6rbA1iCnBHJfPi0N7Fh5KnOrA xASA== X-Gm-Message-State: AOAM532+28zc5pdoGA41CRzdR3roxk+2yCyygrTFRdoLqXRti70zkI+/ gRMZv37u38Wej4/QWumoaSo= X-Google-Smtp-Source: ABdhPJxrlYneBL/21Vv+jWVwD9xwJ6n1OmSun1pN9q8BI/YgevVlJp7ILLU6zark7cDESnfNn2z9lQ== X-Received: by 2002:a17:90b:4a4b:: with SMTP id lb11mr5443506pjb.99.1627059722696; Fri, 23 Jul 2021 10:02:02 -0700 (PDT) Received: from sc2-haas01-esx0118.eng.vmware.com ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id d15sm33479004pfl.82.2021.07.23.10.02.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Jul 2021 10:02:02 -0700 (PDT) From: Nadav Amit X-Google-Original-From: Nadav Amit To: Joerg Roedel Subject: [PATCH v6 3/7] iommu: Improve iommu_iotlb_gather helpers Date: Fri, 23 Jul 2021 02:32:05 -0700 Message-Id: <20210723093209.714328-4-namit@vmware.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210723093209.714328-1-namit@vmware.com> References: <20210723093209.714328-1-namit@vmware.com> MIME-Version: 1.0 Cc: Robin Murphy , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Nadav Amit , Jiajun Cao , Will Deacon X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Robin Murphy The Mediatek driver is not the only one which might want a basic address-based gathering behaviour, so although it's arguably simple enough to open-code, let's factor it out for the sake of cleanliness. Let's also take this opportunity to document the intent of these helpers for clarity. Cc: Joerg Roedel Cc: Will Deacon Cc: Jiajun Cao Cc: Robin Murphy Cc: Lu Baolu Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Robin Murphy Signed-off-by: Nadav Amit --- drivers/iommu/mtk_iommu.c | 6 +----- include/linux/iommu.h | 38 +++++++++++++++++++++++++++++++++----- 2 files changed, 34 insertions(+), 10 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 6f7c69688ce2..d9939e4af35c 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -520,12 +520,8 @@ static size_t mtk_iommu_unmap(struct iommu_domain *domain, struct iommu_iotlb_gather *gather) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); - unsigned long end = iova + size - 1; - if (gather->start > iova) - gather->start = iova; - if (gather->end < end) - gather->end = end; + iommu_iotlb_gather_add_range(gather, iova, size); return dom->iop->unmap(dom->iop, iova, size, gather); } diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 32d448050bf7..e554871db46f 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -497,6 +497,38 @@ static inline void iommu_iotlb_sync(struct iommu_domain *domain, iommu_iotlb_gather_init(iotlb_gather); } +/** + * iommu_iotlb_gather_add_range - Gather for address-based TLB invalidation + * @gather: TLB gather data + * @iova: start of page to invalidate + * @size: size of page to invalidate + * + * Helper for IOMMU drivers to build arbitrarily-sized invalidation commands + * where only the address range matters, and simply minimising intermediate + * syncs is preferred. + */ +static inline void iommu_iotlb_gather_add_range(struct iommu_iotlb_gather *gather, + unsigned long iova, size_t size) +{ + unsigned long end = iova + size - 1; + + if (gather->start > iova) + gather->start = iova; + if (gather->end < end) + gather->end = end; +} + +/** + * iommu_iotlb_gather_add_page - Gather for page-based TLB invalidation + * @domain: IOMMU domain to be invalidated + * @gather: TLB gather data + * @iova: start of page to invalidate + * @size: size of page to invalidate + * + * Helper for IOMMU drivers to build invalidation commands based on individual + * pages, or with page size/table level hints which cannot be gathered if they + * differ. + */ static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size) @@ -515,11 +547,7 @@ static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, gather->pgsize = size; } - if (gather->end < end) - gather->end = end; - - if (gather->start > start) - gather->start = start; + iommu_iotlb_gather_add_range(gather, iova, size); } /* PCI device grouping function */ -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu