swiotlb: change swiotlb_bus_to[phys,virt] prototypes

Add a hwdev argument that is needed on some architectures
in order to access a per-device offset that is taken into
account when producing a physical address (also needed to
get from bus address to virtual address because the physical
address is an intermediate step).

Also make swiotlb_bus_to_virt weak so architectures can
override it.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Cc: jeremy@goop.org
Cc: ian.campbell@citrix.com
LKML-Reference: <1239199761-22886-8-git-send-email-galak@kernel.crashing.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index 34f12e9996ed84126ff95b0eb9c0975d56ef9a73..887388a1c57d65ceea64b94ea4a786135b6dc28e 100644 (file)
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -28,7 +28,7 @@ dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
        return paddr;
 }
 
-phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
+phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
 {
        return baddr;
 }

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index ac9ff54f7cb305943e5444f27be83460ef398206..cb1a6631b8f449bcf2738f37208783dd23be87ba 100644 (file)
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -29,7 +29,8 @@ extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
 
 extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
                                      phys_addr_t address);
-extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
+extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
+                                      dma_addr_t address);
 
 extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
 

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index d912f068145cde10536750aa67f5aed5b6ac31b9..bffe6d7ef9d9a01a52db11e12e54207bc9b41a0c 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -129,7 +129,7 @@ dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
        return paddr;
 }
 
-phys_addr_t __weak swiotlb_bus_to_phys(dma_addr_t baddr)
+phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
 {
        return baddr;
 }
@@ -140,9 +140,9 @@ static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
        return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
 }
 
-static void *swiotlb_bus_to_virt(dma_addr_t address)
+void * __weak swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address)
 {
-       return phys_to_virt(swiotlb_bus_to_phys(address));
+       return phys_to_virt(swiotlb_bus_to_phys(hwdev, address));
 }
 
 int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
@@ -691,7 +691,7 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page);
 static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
                         size_t size, int dir)
 {
-       char *dma_addr = swiotlb_bus_to_virt(dev_addr);
+       char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
 
        BUG_ON(dir == DMA_NONE);
 
@@ -728,7 +728,7 @@ static void
 swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
                    size_t size, int dir, int target)
 {
-       char *dma_addr = swiotlb_bus_to_virt(dev_addr);
+       char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr);
 
        BUG_ON(dir == DMA_NONE);