From 92aec09cc87975f66d3a84001876693d9ac6073b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 20 May 2019 09:29:30 +0200 Subject: [PATCH] iommu/dma: Move __iommu_dma_map Moving this function up to its unmap counterpart helps to keep related code together for the following changes. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy Signed-off-by: Joerg Roedel --- drivers/iommu/dma-iommu.c | 46 +++++++++++++++++++++++----------------------- 1 file changed, 23 insertions(+), 23 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index e34ba23..c406abe 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -464,6 +464,29 @@ static void __iommu_dma_unmap(struct iommu_domain *domain, dma_addr_t dma_addr, iommu_dma_free_iova(cookie, dma_addr, size); } +static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, + size_t size, int prot, struct iommu_domain *domain) +{ + struct iommu_dma_cookie *cookie = domain->iova_cookie; + size_t iova_off = 0; + dma_addr_t iova; + + if (cookie->type == IOMMU_DMA_IOVA_COOKIE) { + iova_off = iova_offset(&cookie->iovad, phys); + size = iova_align(&cookie->iovad, size + iova_off); + } + + iova = iommu_dma_alloc_iova(domain, size, dma_get_mask(dev), dev); + if (!iova) + return DMA_MAPPING_ERROR; + + if (iommu_map(domain, iova, phys - iova_off, size, prot)) { + iommu_dma_free_iova(cookie, iova, size); + return DMA_MAPPING_ERROR; + } + return iova + iova_off; +} + static void __iommu_dma_free_pages(struct page **pages, int count) { while (count--) @@ -692,29 +715,6 @@ static void iommu_dma_sync_sg_for_device(struct device *dev, arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir); } -static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, - size_t size, int prot, struct iommu_domain *domain) -{ - struct iommu_dma_cookie *cookie = domain->iova_cookie; - size_t iova_off = 0; - dma_addr_t iova; - - if (cookie->type == IOMMU_DMA_IOVA_COOKIE) { - iova_off = iova_offset(&cookie->iovad, phys); - size = iova_align(&cookie->iovad, size + iova_off); - } - - iova = iommu_dma_alloc_iova(domain, size, dma_get_mask(dev), dev); - if (!iova) - return DMA_MAPPING_ERROR; - - if (iommu_map(domain, iova, phys - iova_off, size, prot)) { - iommu_dma_free_iova(cookie, iova, size); - return DMA_MAPPING_ERROR; - } - return iova + iova_off; -} - static dma_addr_t __iommu_dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, int prot) { -- 2.7.4