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| author |   Christoph Hellwig <hch@lst.de> | 2019-04-16 20:23:41 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-05-08 17:11:57 -0700 |
| commit | f25b23bc156fef3211fe4adf9692eca5ce2fd082 (patch) | |
| tree | bbb9ed785ee3242dccc63c0e897146c28df160a6 /arch/sparc/mm/iommu.c | |
| parent | sparc/iommu: use sbus_iommu_unmap_page in sbus_iommu_unmap_sg (diff) | |
| download | linux-dev-f25b23bc156fef3211fe4adf9692eca5ce2fd082.tar.xz linux-dev-f25b23bc156fef3211fe4adf9692eca5ce2fd082.zip | |
sparc/iommu: merge iommu_release_one and sbus_iommu_unmap_page
There is only one caller of iommu_release_one left, so merge it into
that one to clean things up a bit.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | arch/sparc/mm/iommu.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index f47a6ce0acaa..7cb9ddda7531 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -291,14 +291,17 @@ static int sbus_iommu_map_sg_pflush(struct device *dev, struct scatterlist *sgl, return nents; } -static void iommu_release_one(struct device *dev, u32 busa, int npages) +static void sbus_iommu_unmap_page(struct device *dev, dma_addr_t dma_addr, + size_t len, enum dma_data_direction dir, unsigned long attrs) { struct iommu_struct *iommu = dev->archdata.iommu; - int ioptex; - int i; + unsigned int busa = dma_addr & PAGE_MASK; + unsigned long off = dma_addr & ~PAGE_MASK; + unsigned int npages = (off + len + PAGE_SIZE-1) >> PAGE_SHIFT; + unsigned int ioptex = (busa - iommu->start) >> PAGE_SHIFT; + unsigned int i; BUG_ON(busa < iommu->start); - ioptex = (busa - iommu->start) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { iopte_val(iommu->page_table[ioptex + i]) = 0; iommu_invalidate_page(iommu->regs, busa); @@ -307,16 +310,6 @@ static void iommu_release_one(struct device *dev, u32 busa, int npages) bit_map_clear(&iommu->usemap, ioptex, npages); } -static void sbus_iommu_unmap_page(struct device *dev, dma_addr_t dma_addr, - size_t len, enum dma_data_direction dir, unsigned long attrs) -{ - unsigned long off = dma_addr & ~PAGE_MASK; - int npages; - - npages = (off + len + PAGE_SIZE-1) >> PAGE_SHIFT; - iommu_release_one(dev, dma_addr & PAGE_MASK, npages); -} - static void sbus_iommu_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) { |