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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 34FCCC433FF for ; Thu, 1 Aug 2019 06:21:45 +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 DE23E20644 for ; Thu, 1 Aug 2019 06:21:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE23E20644 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 034D589C0; Thu, 1 Aug 2019 06:21:10 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 953E08953 for ; Thu, 1 Aug 2019 06:03:01 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 070DD821 for ; Thu, 1 Aug 2019 06:03:00 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Jul 2019 23:03:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,333,1559545200"; d="scan'208";a="184119291" Received: from allen-box.sh.intel.com ([10.239.159.136]) by orsmga002.jf.intel.com with ESMTP; 31 Jul 2019 23:02:58 -0700 From: Lu Baolu To: David Woodhouse , Joerg Roedel Subject: [PATCH 3/3] iommu/vt-d: Cleanup after using per-device dma ops Date: Thu, 1 Aug 2019 14:01:56 +0800 Message-Id: <20190801060156.8564-4-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190801060156.8564-1-baolu.lu@linux.intel.com> References: <20190801060156.8564-1-baolu.lu@linux.intel.com> Cc: kevin.tian@intel.com, ashok.raj@intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jacob.jun.pan@intel.com, Robin Murphy , 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="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org After using per-device dma ops, we don't need to check whether a dvice needs mapping, hence all checks of iommu_need_mapping() are unnecessary now. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Signed-off-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 50 ++++--------------------------------- 1 file changed, 5 insertions(+), 45 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 609b539b93f6..f7399d98f404 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2761,17 +2761,6 @@ static int __init si_domain_init(int hw) return 0; } -static int identity_mapping(struct device *dev) -{ - struct device_domain_info *info; - - info = dev->archdata.iommu; - if (info && info != DUMMY_DEVICE_DOMAIN_INFO) - return (info->domain == si_domain); - - return 0; -} - static int domain_add_dev_info(struct dmar_domain *domain, struct device *dev) { struct dmar_domain *ndomain; @@ -3428,15 +3417,6 @@ static struct dmar_domain *get_private_domain_for_dev(struct device *dev) return domain; } -/* Check if the dev needs to go through non-identity map and unmap process.*/ -static bool iommu_need_mapping(struct device *dev) -{ - if (iommu_dummy(dev)) - return false; - - return !identity_mapping(dev); -} - static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir, u64 dma_mask) { @@ -3498,20 +3478,15 @@ static dma_addr_t intel_map_page(struct device *dev, struct page *page, enum dma_data_direction dir, unsigned long attrs) { - if (iommu_need_mapping(dev)) - return __intel_map_single(dev, page_to_phys(page) + offset, - size, dir, *dev->dma_mask); - return dma_direct_map_page(dev, page, offset, size, dir, attrs); + return __intel_map_single(dev, page_to_phys(page) + offset, + size, dir, *dev->dma_mask); } static dma_addr_t intel_map_resource(struct device *dev, phys_addr_t phys_addr, size_t size, enum dma_data_direction dir, unsigned long attrs) { - if (iommu_need_mapping(dev)) - return __intel_map_single(dev, phys_addr, size, dir, - *dev->dma_mask); - return dma_direct_map_resource(dev, phys_addr, size, dir, attrs); + return __intel_map_single(dev, phys_addr, size, dir, *dev->dma_mask); } static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) @@ -3563,17 +3538,13 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, unsigned long attrs) { - if (iommu_need_mapping(dev)) - intel_unmap(dev, dev_addr, size); - else - dma_direct_unmap_page(dev, dev_addr, size, dir, attrs); + intel_unmap(dev, dev_addr, size); } static void intel_unmap_resource(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, unsigned long attrs) { - if (iommu_need_mapping(dev)) - intel_unmap(dev, dev_addr, size); + intel_unmap(dev, dev_addr, size); } static void *intel_alloc_coherent(struct device *dev, size_t size, @@ -3583,9 +3554,6 @@ static void *intel_alloc_coherent(struct device *dev, size_t size, struct page *page = NULL; int order; - if (!iommu_need_mapping(dev)) - return dma_direct_alloc(dev, size, dma_handle, flags, attrs); - size = PAGE_ALIGN(size); order = get_order(size); @@ -3619,9 +3587,6 @@ static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, int order; struct page *page = virt_to_page(vaddr); - if (!iommu_need_mapping(dev)) - return dma_direct_free(dev, size, vaddr, dma_handle, attrs); - size = PAGE_ALIGN(size); order = get_order(size); @@ -3639,9 +3604,6 @@ static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist, struct scatterlist *sg; int i; - if (!iommu_need_mapping(dev)) - return dma_direct_unmap_sg(dev, sglist, nelems, dir, attrs); - for_each_sg(sglist, sg, nelems, i) { nrpages += aligned_nrpages(sg_dma_address(sg), sg_dma_len(sg)); } @@ -3663,8 +3625,6 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele struct intel_iommu *iommu; BUG_ON(dir == DMA_NONE); - if (!iommu_need_mapping(dev)) - return dma_direct_map_sg(dev, sglist, nelems, dir, attrs); domain = deferred_attach_domain(dev); if (!domain) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu