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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 02B14C433ED for ; Mon, 10 May 2021 14:22:42 +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 A3B1361483 for ; Mon, 10 May 2021 14:22:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3B1361483 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 6F08860BDF; Mon, 10 May 2021 14:22:41 +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 WuV7lbut-f3Z; Mon, 10 May 2021 14:22:40 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTP id 67B6560BD7; Mon, 10 May 2021 14:22:40 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4CAB9C0001; Mon, 10 May 2021 14:22:40 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 49602C0001 for ; Mon, 10 May 2021 14:22:38 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 2B8488408F for ; Mon, 10 May 2021 14:22:38 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org 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 PX5OvGUf6sGx for ; Mon, 10 May 2021 14:22:37 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) by smtp1.osuosl.org (Postfix) with ESMTPS id 09AF283EAE for ; Mon, 10 May 2021 14:22:36 +0000 (UTC) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4Ff38H6410zqTrx; Mon, 10 May 2021 22:19:11 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Mon, 10 May 2021 22:22:25 +0800 From: John Garry To: , , , , Subject: [PATCH v2 04/15] iommu: Add iommu_group_get_max_opt_dma_size() Date: Mon, 10 May 2021 22:17:18 +0800 Message-ID: <1620656249-68890-5-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1620656249-68890-1-git-send-email-john.garry@huawei.com> References: <1620656249-68890-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Cc: linux-scsi@vger.kernel.org, linuxarm@huawei.com, linux-kernel@vger.kernel.org, sai.praneeth.prakhya@intel.com, iommu@lists.linux-foundation.org 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" Add a function to return the max optimised DMA size for an IOMMU group. Signed-off-by: John Garry --- drivers/iommu/iommu.c | 5 +++++ include/linux/iommu.h | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 63cdfb11ebed..62e4491f32e0 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2296,6 +2296,11 @@ struct iommu_domain *iommu_get_dma_domain(struct device *dev) return dev->iommu_group->default_domain; } +size_t iommu_group_get_max_opt_dma_size(struct iommu_group *group) +{ + return group->max_opt_dma_size; +} + /* * IOMMU groups are really the natural working unit of the IOMMU, but * the IOMMU API works on domains and devices. Bridge that gap by diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 32d448050bf7..e26abda94792 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -405,6 +405,7 @@ extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid); extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); extern struct iommu_domain *iommu_get_dma_domain(struct device *dev); +extern size_t iommu_group_get_max_opt_dma_size(struct iommu_group *group); extern int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot); extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova, @@ -653,6 +654,11 @@ static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev) return NULL; } +static inline size_t iommu_group_get_max_opt_dma_size(struct iommu_group *group) +{ + return 0; +} + static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot) { -- 2.26.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu