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authorChristoph Hellwig <hch@lst.de>2019-04-16 20:23:41 +0200
committerDavid S. Miller <davem@davemloft.net>2019-05-08 17:11:57 -0700
commitf25b23bc156fef3211fe4adf9692eca5ce2fd082 (patch)
treebbb9ed785ee3242dccc63c0e897146c28df160a6 /arch/sparc
parenta7fce1f7ca2f092fe44a17cb158deda97060aab4 (diff)
downloadlinux-f25b23bc156fef3211fe4adf9692eca5ce2fd082.tar.bz2
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 'arch/sparc')
-rw-r--r--arch/sparc/mm/iommu.c21
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)
{