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authorMuli Ben-Yehuda <muli@il.ibm.com>2007-07-21 17:10:51 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-21 18:37:11 -0700
commit35b6dfa08736e8a362b9d41ff52ffa1eb36505a9 (patch)
tree773586a7d26873b4b180242118ab7f94e9c4485d /arch/x86_64/kernel
parentff297b8c081bdc60507eaeb1838996e0c67141c8 (diff)
x86_64: abstract how we find the iommu_table for a device
... in preparation for doing it differently for CalIOC2. Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/kernel')
-rw-r--r--arch/x86_64/kernel/pci-calgary.c21
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 7218b5b51e0..a2828e156c3 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_table *tbl, dma_addr_t dma_addr,
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, struct scatterlist *sglist,
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(struct device* dev,
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 device *dev, void *vaddr,
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 device *dev, void *vaddr,
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 device *dev, size_t size,
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;