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sparc/iommu: merge iommu_release_one and sbus_iommu_unmap_page

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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>
This commit is contained in:
Christoph Hellwig 2019-04-16 20:23:41 +02:00 committed by David S. Miller
parent a7fce1f7ca
commit f25b23bc15
1 changed files with 7 additions and 14 deletions
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21
arch/sparc/mm/iommu.c
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@ -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)
{