From b82059428c0577c2ec082974d7956291d5eae2cf Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 16 Apr 2019 20:23:43 +0200 Subject: sparc/iommu: pass a physical address to iommu_get_one No need for the page structure, just the paddr / pfn. This is going to simplify fixes to the callers. Signed-off-by: Christoph Hellwig Reported-by: Guenter Roeck Signed-off-by: David S. Miller --- arch/sparc/mm/iommu.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'arch/sparc') diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index f90d943a3a27..19d9266e4049 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -175,16 +175,17 @@ static void iommu_flush_iotlb(iopte_t *iopte, unsigned int niopte) } } -static u32 iommu_get_one(struct device *dev, struct page *page, int npages) +static u32 iommu_get_one(struct device *dev, phys_addr_t paddr, int npages) { struct iommu_struct *iommu = dev->archdata.iommu; int ioptex; iopte_t *iopte, *iopte0; unsigned int busa, busa0; + unsigned long pfn = __phys_to_pfn(paddr); int i; /* page color = pfn of page */ - ioptex = bit_map_string_get(&iommu->usemap, npages, page_to_pfn(page)); + ioptex = bit_map_string_get(&iommu->usemap, npages, pfn); if (ioptex < 0) panic("iommu out"); busa0 = iommu->start + (ioptex << PAGE_SHIFT); @@ -193,11 +194,11 @@ static u32 iommu_get_one(struct device *dev, struct page *page, int npages) busa = busa0; iopte = iopte0; for (i = 0; i < npages; i++) { - iopte_val(*iopte) = MKIOPTE(page_to_pfn(page), IOPERM); + iopte_val(*iopte) = MKIOPTE(pfn, IOPERM); iommu_invalidate_page(iommu->regs, busa); busa += PAGE_SIZE; iopte++; - page++; + pfn++; } iommu_flush_iotlb(iopte0, npages); @@ -215,7 +216,7 @@ static dma_addr_t __sbus_iommu_map_page(struct device *dev, struct page *page, /* XXX So what is maxphys for us and how do drivers know it? */ if (!len || len > 256 * 1024) return DMA_MAPPING_ERROR; - return iommu_get_one(dev, virt_to_page(vaddr), npages) + off; + return iommu_get_one(dev, virt_to_phys(vaddr), npages) + off; } static dma_addr_t sbus_iommu_map_page_gflush(struct device *dev, @@ -268,7 +269,7 @@ static int __sbus_iommu_map_sg(struct device *dev, struct scatterlist *sgl, } } - sg->dma_address = iommu_get_one(dev, sg_page(sg), n) + sg->offset; + sg->dma_address = iommu_get_one(dev, sg_phys(sg), n) + sg->offset; sg->dma_length = sg->length; } -- cgit