From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752306AbeCWTwI (ORCPT ); Fri, 23 Mar 2018 15:52:08 -0400 Received: from terminus.zytor.com ([198.137.202.136]:45553 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751828AbeCWTwH (ORCPT ); Fri, 23 Mar 2018 15:52:07 -0400 Date: Fri, 23 Mar 2018 12:51:34 -0700 From: tip-bot for Christoph Hellwig Message-ID: Cc: mingo@kernel.org, peterz@infradead.org, dwmw2@infradead.org, hpa@zytor.com, jdmason@kudzu.us, tglx@linutronix.de, linux-kernel@vger.kernel.org, hch@lst.de, mulix@mulix.org, konrad.wilk@oracle.com, joro@8bytes.org, torvalds@linux-foundation.org, thomas.lendacky@amd.com Reply-To: joro@8bytes.org, thomas.lendacky@amd.com, torvalds@linux-foundation.org, mulix@mulix.org, konrad.wilk@oracle.com, linux-kernel@vger.kernel.org, hch@lst.de, mingo@kernel.org, peterz@infradead.org, dwmw2@infradead.org, jdmason@kudzu.us, hpa@zytor.com, tglx@linutronix.de In-Reply-To: <20180319103826.12853-9-hch@lst.de> References: <20180319103826.12853-9-hch@lst.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/dma] iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent() Git-Commit-ID: d657c5c73ca987214a6f9436e435b34fc60f332a X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: d657c5c73ca987214a6f9436e435b34fc60f332a Gitweb: https://git.kernel.org/tip/d657c5c73ca987214a6f9436e435b34fc60f332a Author: Christoph Hellwig AuthorDate: Mon, 19 Mar 2018 11:38:20 +0100 Committer: Ingo Molnar CommitDate: Tue, 20 Mar 2018 10:01:58 +0100 iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent() Use the dma_direct_*() helpers and clean up the code flow. Tested-by: Tom Lendacky Signed-off-by: Christoph Hellwig Reviewed-by: Thomas Gleixner Cc: David Woodhouse Cc: Joerg Roedel Cc: Jon Mason Cc: Konrad Rzeszutek Wilk Cc: Linus Torvalds Cc: Muli Ben-Yehuda Cc: Peter Zijlstra Cc: iommu@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20180319103826.12853-9-hch@lst.de Signed-off-by: Ingo Molnar --- drivers/iommu/Kconfig | 1 + drivers/iommu/intel-iommu.c | 62 ++++++++++++--------------------------------- 2 files changed, 17 insertions(+), 46 deletions(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index dc7c1914645d..df171cb85822 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -143,6 +143,7 @@ config DMAR_TABLE config INTEL_IOMMU bool "Support for Intel IOMMU using DMA Remapping Devices" depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC) + select DMA_DIRECT_OPS select IOMMU_API select IOMMU_IOVA select DMAR_TABLE diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index fd899b2a12bb..24d1b1b42013 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -3708,61 +3709,30 @@ static void *intel_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) { - struct page *page = NULL; - int order; - - size = PAGE_ALIGN(size); - order = get_order(size); - - if (!iommu_no_mapping(dev)) - flags &= ~(GFP_DMA | GFP_DMA32); - else if (dev->coherent_dma_mask < dma_get_required_mask(dev)) { - if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) - flags |= GFP_DMA; - else - flags |= GFP_DMA32; - } + void *vaddr; - if (gfpflags_allow_blocking(flags)) { - unsigned int count = size >> PAGE_SHIFT; + vaddr = dma_direct_alloc(dev, size, dma_handle, flags, attrs); + if (iommu_no_mapping(dev) || !vaddr) + return vaddr; - page = dma_alloc_from_contiguous(dev, count, order, flags); - if (page && iommu_no_mapping(dev) && - page_to_phys(page) + size > dev->coherent_dma_mask) { - dma_release_from_contiguous(dev, page, count); - page = NULL; - } - } - - if (!page) - page = alloc_pages(flags, order); - if (!page) - return NULL; - memset(page_address(page), 0, size); - - *dma_handle = __intel_map_single(dev, page_to_phys(page), size, - DMA_BIDIRECTIONAL, - dev->coherent_dma_mask); - if (*dma_handle) - return page_address(page); - if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) - __free_pages(page, order); + *dma_handle = __intel_map_single(dev, virt_to_phys(vaddr), + PAGE_ALIGN(size), DMA_BIDIRECTIONAL, + dev->coherent_dma_mask); + if (!*dma_handle) + goto out_free_pages; + return vaddr; +out_free_pages: + dma_direct_free(dev, size, vaddr, *dma_handle, attrs); return NULL; } static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { - int order; - struct page *page = virt_to_page(vaddr); - - size = PAGE_ALIGN(size); - order = get_order(size); - - intel_unmap(dev, dma_handle, size); - if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) - __free_pages(page, order); + if (!iommu_no_mapping(dev)) + intel_unmap(dev, dma_handle, PAGE_ALIGN(size)); + dma_direct_free(dev, size, vaddr, dma_handle, attrs); } static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist,