From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lu Baolu Subject: [PATCH v3 01/10] iommu: Add helper to get minimal page size of domain Date: Sun, 21 Apr 2019 09:17:10 +0800 Message-ID: <20190421011719.14909-2-baolu.lu@linux.intel.com> References: <20190421011719.14909-1-baolu.lu@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190421011719.14909-1-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: David Woodhouse , Joerg Roedel Cc: kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, Konrad Rzeszutek Wilk , alan.cox-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, Robin Murphy , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, pengfei.xu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, jacob.jun.pan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, Christoph Hellwig List-Id: iommu@lists.linux-foundation.org This makes it possible for other modules to know the minimal page size supported by a domain without the knowledge of the structure details. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a5007d035218..46679ef19b7e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -377,6 +377,14 @@ static inline void iommu_tlb_sync(struct iommu_domain *domain) domain->ops->iotlb_sync(domain); } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + if (domain && domain->pgsize_bitmap) + return 1 << __ffs(domain->pgsize_bitmap); + + return 0; +} + /* PCI device grouping function */ extern struct iommu_group *pci_device_group(struct device *dev); /* Generic device grouping function */ @@ -704,6 +712,11 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + return 0; +} + #endif /* CONFIG_IOMMU_API */ #ifdef CONFIG_IOMMU_DEBUGFS -- 2.17.1 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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, 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 93C54C282E2 for ; Sun, 21 Apr 2019 01:24:49 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 6BE5A20651 for ; Sun, 21 Apr 2019 01:24:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6BE5A20651 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id A6D972C9C; Sun, 21 Apr 2019 01:24:43 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 9E5802BE9 for ; Sun, 21 Apr 2019 01:23:50 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 3DD7C14D for ; Sun, 21 Apr 2019 01:23:50 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Apr 2019 18:23:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,376,1549958400"; d="scan'208";a="136008124" Received: from allen-box.sh.intel.com ([10.239.159.136]) by orsmga008.jf.intel.com with ESMTP; 20 Apr 2019 18:23:47 -0700 From: Lu Baolu To: David Woodhouse , Joerg Roedel Subject: [PATCH v3 01/10] iommu: Add helper to get minimal page size of domain Date: Sun, 21 Apr 2019 09:17:10 +0800 Message-Id: <20190421011719.14909-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190421011719.14909-1-baolu.lu@linux.intel.com> References: <20190421011719.14909-1-baolu.lu@linux.intel.com> Cc: kevin.tian@intel.com, ashok.raj@intel.com, Konrad Rzeszutek Wilk , alan.cox@intel.com, Robin Murphy , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, pengfei.xu@intel.com, jacob.jun.pan@intel.com, mika.westerberg@linux.intel.com, Christoph Hellwig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Message-ID: <20190421011710.xQnYpAMB-_Q2Dvs3JJ_ZMlgF77A4Xr6XnvsDNOZVjH0@z> This makes it possible for other modules to know the minimal page size supported by a domain without the knowledge of the structure details. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a5007d035218..46679ef19b7e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -377,6 +377,14 @@ static inline void iommu_tlb_sync(struct iommu_domain *domain) domain->ops->iotlb_sync(domain); } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + if (domain && domain->pgsize_bitmap) + return 1 << __ffs(domain->pgsize_bitmap); + + return 0; +} + /* PCI device grouping function */ extern struct iommu_group *pci_device_group(struct device *dev); /* Generic device grouping function */ @@ -704,6 +712,11 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } +static inline unsigned long domain_minimal_pgsize(struct iommu_domain *domain) +{ + return 0; +} + #endif /* CONFIG_IOMMU_API */ #ifdef CONFIG_IOMMU_DEBUGFS -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu