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authorChristoph Hellwig <hch@lst.de>2019-04-16 20:23:43 +0200
committerDavid S. Miller <davem@davemloft.net>2019-05-08 17:11:57 -0700
commitb82059428c0577c2ec082974d7956291d5eae2cf (patch)
tree5cd8644c6e3ef7e67e2dc27e96e01d7dbeb2eb96 /arch/sparc
parentff5cbec0c3ea8b96c4cb7bcd9f484d8665d394e6 (diff)
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 <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.c13
1 files changed, 7 insertions, 6 deletions
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;
}