x86, ia64: convert to use generic dma_map_ops struct

This converts X86 and IA64 to use include/linux/dma-mapping.h.

It's a bit large but pretty boring. The major change for X86 is
converting 'int dir' to 'enum dma_data_direction dir' in DMA mapping
operations. The major changes for IA64 is using map_page and
unmap_page instead of map_single and unmap_single.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 60 insertions, 33 deletions

diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c
index 427f69617226..7060e13fa421 100644
--- a/arch/ia64/kernel/dma-mapping.c
+++ b/arch/ia64/kernel/dma-mapping.c
@@ -1,9 +1,9 @@
 #include <linux/dma-mapping.h>
 
-struct dma_mapping_ops *dma_ops;
+struct dma_map_ops *dma_ops;
 EXPORT_SYMBOL(dma_ops);
 
-struct dma_mapping_ops *dma_get_ops(struct device *dev)
+struct dma_map_ops *dma_get_ops(struct device *dev)
 {
 	return dma_ops;
 }
diff --git a/arch/ia64/kernel/machvec.c b/arch/ia64/kernel/machvec.c
index 7ccb228ceedc..d41a40ef80c0 100644
--- a/arch/ia64/kernel/machvec.c
+++ b/arch/ia64/kernel/machvec.c
@@ -1,5 +1,5 @@
 #include <linux/module.h>
-
+#include <linux/dma-mapping.h>
 #include <asm/machvec.h>
 #include <asm/system.h>
 
@@ -75,14 +75,16 @@ machvec_timer_interrupt (int irq, void *dev_id)
 EXPORT_SYMBOL(machvec_timer_interrupt);
 
 void
-machvec_dma_sync_single (struct device *hwdev, dma_addr_t dma_handle, size_t size, int dir)
+machvec_dma_sync_single(struct device *hwdev, dma_addr_t dma_handle, size_t size,
+			enum dma_data_direction dir)
 {
 	mb();
 }
 EXPORT_SYMBOL(machvec_dma_sync_single);
 
 void
-machvec_dma_sync_sg (struct device *hwdev, struct scatterlist *sg, int n, int dir)
+machvec_dma_sync_sg(struct device *hwdev, struct scatterlist *sg, int n,
+		    enum dma_data_direction dir)
 {
 	mb();
 }
diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c
index 640669eba5d4..b30209ec8c6e 100644
--- a/arch/ia64/kernel/pci-dma.c
+++ b/arch/ia64/kernel/pci-dma.c
@@ -41,21 +41,7 @@ struct device fallback_dev = {
 	.dma_mask = &fallback_dev.coherent_dma_mask,
 };
 
-extern struct dma_mapping_ops vtd_dma_ops;
-
-void __init pci_iommu_alloc(void)
-{
-	dma_ops = &vtd_dma_ops;
-	/*
-	 * The order of these functions is important for
-	 * fall-back/fail-over reasons
-	 */
-	detect_intel_iommu();
-
-#ifdef CONFIG_SWIOTLB
-	pci_swiotlb_init();
-#endif
-}
+extern struct dma_map_ops intel_dma_ops;
 
 static int __init pci_iommu_init(void)
 {
@@ -81,10 +67,10 @@ iommu_dma_init(void)
 
 int iommu_dma_supported(struct device *dev, u64 mask)
 {
-	struct dma_mapping_ops *ops = platform_dma_get_ops(dev);
+	struct dma_map_ops *ops = platform_dma_get_ops(dev);
 
-	if (ops->dma_supported_op)
-		return ops->dma_supported_op(dev, mask);
+	if (ops->dma_supported)
+		return ops->dma_supported(dev, mask);
 
 	/* Copied from i386. Doesn't make much sense, because it will
 	   only work for pci_alloc_coherent.
@@ -113,4 +99,31 @@ int iommu_dma_supported(struct device *dev, u64 mask)
 }
 EXPORT_SYMBOL(iommu_dma_supported);
 
+static int vtd_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+void __init pci_iommu_alloc(void)
+{
+	dma_ops = &intel_dma_ops;
+
+	dma_ops->sync_single_for_cpu = machvec_dma_sync_single;
+	dma_ops->sync_sg_for_cpu = machvec_dma_sync_sg;
+	dma_ops->sync_single_for_device = machvec_dma_sync_single;
+	dma_ops->sync_sg_for_device = machvec_dma_sync_sg;
+	dma_ops->dma_supported = iommu_dma_supported;
+	dma_ops->mapping_error = vtd_dma_mapping_error;
+
+	/*
+	 * The order of these functions is important for
+	 * fall-back/fail-over reasons
+	 */
+	detect_intel_iommu();
+
+#ifdef CONFIG_SWIOTLB
+	pci_swiotlb_init();
+#endif
+}
+
 #endif
diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c
index 9f172c864377..6bf8f66786bd 100644
--- a/arch/ia64/kernel/pci-swiotlb.c
+++ b/arch/ia64/kernel/pci-swiotlb.c
@@ -16,24 +16,36 @@ EXPORT_SYMBOL(swiotlb);
 /* Set this to 1 if there is a HW IOMMU in the system */
 int iommu_detected __read_mostly;
 
-struct dma_mapping_ops swiotlb_dma_ops = {
+static dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
+				   unsigned long offset, size_t size,
+				   enum dma_data_direction dir,
+				   struct dma_attrs *attrs)
+{
+	return swiotlb_map_single_attrs(dev, page_address(page) + offset, size,
+					dir, attrs);
+}
+
+static void swiotlb_unmap_page(struct device *dev, dma_addr_t dma_handle,
+			       size_t size, enum dma_data_direction dir,
+			       struct dma_attrs *attrs)
+{
+	swiotlb_unmap_single_attrs(dev, dma_handle, size, dir, attrs);
+}
+
+struct dma_map_ops swiotlb_dma_ops = {
 	.alloc_coherent = swiotlb_alloc_coherent,
 	.free_coherent = swiotlb_free_coherent,
-	.map_single = swiotlb_map_single,
-	.unmap_single = swiotlb_unmap_single,
-	.map_single_attrs = swiotlb_map_single_attrs,
-	.unmap_single_attrs = swiotlb_unmap_single_attrs,
-	.map_sg_attrs = swiotlb_map_sg_attrs,
-	.unmap_sg_attrs	= swiotlb_unmap_sg_attrs,
+	.map_page = swiotlb_map_page,
+	.unmap_page = swiotlb_unmap_page,
+	.map_sg = swiotlb_map_sg_attrs,
+	.unmap_sg = swiotlb_unmap_sg_attrs,
 	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
 	.sync_single_for_device = swiotlb_sync_single_for_device,
 	.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
 	.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
 	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
 	.sync_sg_for_device = swiotlb_sync_sg_for_device,
-	.map_sg = swiotlb_map_sg,
-	.unmap_sg = swiotlb_unmap_sg,
-	.dma_supported_op = swiotlb_dma_supported,
+	.dma_supported = swiotlb_dma_supported,
 	.mapping_error = swiotlb_dma_mapping_error,
 };