From: Christoph Hellwig Subject: [PATCH 39/67] iommu/amd_iommu: use dma_direct_* helpers for the direct mapping case Date: Fri, 29 Dec 2017 09:18:43 +0100 Message-ID: <20171229081911.2802-40-hch@lst.de> References: <20171229081911.2802-1-hch@lst.de> Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=gY1REQEo200sHWj7nehvGeEo/eN8+IrnLe2EtwZurBY=; b=AXZiuNYHPqB0MPi0RnXVXd8T7 U1s+TmDV3irWigvqZscKZZOFdVrJhaLAWQnaxXIisVkoxYkkgwxVckD7/aFWv6cQyOWszcnKZPGTn D/cTMECee6AHfm3xC5okVeBPiKEotbTMxf3PGZ7EVm338ry8EadujrRBY0lqTxmE8exx4CUaN7X1M 7J+DYQNvCtzf6aT+t2i3KmeVvV+Cf5ugqWx2EimOI/awXjWtJUdHe8kGCYytsrvivlbqDG6B4WHme q4lJZKkQSTeFhShvoU6j+KaRNGfs1xmiXXXgxwlPYsWH17+X3DEvozNprqOrlHbc3tRTb8pGBQOtL In-Reply-To: <20171229081911.2802-1-hch@lst.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: iommu@lists.linux-foundation.org Cc: linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, adi-buildroot-devel@lists.sourceforge.net, linux-c6x-dev@linux-c6x.org, linux-cris-kernel@axis.com, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-metag@vger.kernel.org, Michal Simek , linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, patches@groups.riscv.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Guan Xuetao , x86@kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org This adds support for CMA allocations, but is otherwise identical. Signed-off-by: Christoph Hellwig --- drivers/iommu/Kconfig | 1 + drivers/iommu/amd_iommu.c | 27 +++++++++------------------ 2 files changed, 10 insertions(+), 18 deletions(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index f3a21343e636..dc7c1914645d 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -107,6 +107,7 @@ config IOMMU_PGTABLES_L2 # AMD IOMMU support config AMD_IOMMU bool "AMD IOMMU support" + select DMA_DIRECT_OPS select SWIOTLB select PCI_MSI select PCI_ATS diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index ea4734de5357..a2ad149ab0bf 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2592,11 +2592,9 @@ static void *alloc_coherent(struct device *dev, size_t size, struct page *page; domain = get_domain(dev); - if (PTR_ERR(domain) == -EINVAL) { - page = alloc_pages(flag, get_order(size)); - *dma_addr = page_to_phys(page); - return page_address(page); - } else if (IS_ERR(domain)) + if (PTR_ERR(domain) == -EINVAL) + return dma_direct_alloc(dev, size, dma_addr, flag, attrs); + else if (IS_ERR(domain)) return NULL; dma_dom = to_dma_ops_domain(domain); @@ -2642,24 +2640,17 @@ static void free_coherent(struct device *dev, size_t size, void *virt_addr, dma_addr_t dma_addr, unsigned long attrs) { - struct protection_domain *domain; - struct dma_ops_domain *dma_dom; - struct page *page; + struct protection_domain *domain = get_domain(dev); - page = virt_to_page(virt_addr); size = PAGE_ALIGN(size); - domain = get_domain(dev); - if (IS_ERR(domain)) - goto free_mem; - - dma_dom = to_dma_ops_domain(domain); + if (!IS_ERR(domain)) { + struct dma_ops_domain *dma_dom = to_dma_ops_domain(domain); - __unmap_single(dma_dom, dma_addr, size, DMA_BIDIRECTIONAL); + __unmap_single(dma_dom, dma_addr, size, DMA_BIDIRECTIONAL); + } -free_mem: - if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) - __free_pages(page, get_order(size)); + dma_direct_free(dev, size, virt_addr, dma_addr, attrs); } /* -- 2.14.2