From: Muli Ben-Yehuda <[email protected]>
... in preparation for doing it differently for CalIOC2.
Signed-off-by: Muli Ben-Yehuda <[email protected]>
---
arch/x86_64/kernel/pci-calgary.c | 21 ++++++++++++++-------
1 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index acee770..c5f92ea 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -344,6 +344,15 @@ static void iommu_free(struct iommu_tabl
spin_unlock_irqrestore(&tbl->it_lock, flags);
}
+static inline struct iommu_table *find_iommu_table(struct device *dev)
+{
+ struct iommu_table *tbl;
+
+ tbl = to_pci_dev(dev)->bus->self->sysdata;
+
+ return tbl;
+}
+
static void __calgary_unmap_sg(struct iommu_table *tbl,
struct scatterlist *sglist, int nelems, int direction)
{
@@ -365,7 +374,7 @@ void calgary_unmap_sg(struct device *dev
int nelems, int direction)
{
unsigned long flags;
- struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata;
+ struct iommu_table *tbl = find_iommu_table(dev);
if (!translate_phb(to_pci_dev(dev)))
return;
@@ -394,7 +403,7 @@ static int calgary_nontranslate_map_sg(s
int calgary_map_sg(struct device *dev, struct scatterlist *sg,
int nelems, int direction)
{
- struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata;
+ struct iommu_table *tbl = find_iommu_table(dev);
unsigned long flags;
unsigned long vaddr;
unsigned int npages;
@@ -448,7 +457,7 @@ dma_addr_t calgary_map_single(struct dev
dma_addr_t dma_handle = bad_dma_address;
unsigned long uaddr;
unsigned int npages;
- struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata;
+ struct iommu_table *tbl = find_iommu_table(dev);
uaddr = (unsigned long)vaddr;
npages = num_dma_pages(uaddr, size);
@@ -464,7 +473,7 @@ dma_addr_t calgary_map_single(struct dev
void calgary_unmap_single(struct device *dev, dma_addr_t dma_handle,
size_t size, int direction)
{
- struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata;
+ struct iommu_table *tbl = find_iommu_table(dev);
unsigned int npages;
if (!translate_phb(to_pci_dev(dev)))
@@ -480,9 +489,7 @@ void* calgary_alloc_coherent(struct devi
void *ret = NULL;
dma_addr_t mapping;
unsigned int npages, order;
- struct iommu_table *tbl;
-
- tbl = to_pci_dev(dev)->bus->self->sysdata;
+ struct iommu_table *tbl = find_iommu_table(dev);
size = PAGE_ALIGN(size); /* size rounded up to full pages */
npages = size >> PAGE_SHIFT;
--
1.4.4
-
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