sh: Add support for DMA API debugging.

This wires up support for the generic DMA API debugging.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 37 insertions, 10 deletions

diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 627315ecdb5..ea9d4f41c9d 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -3,6 +3,7 @@
 
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
+#include <linux/dma-debug.h>
 #include <asm/cacheflush.h>
 #include <asm/io.h>
 #include <asm-generic/dma-coherent.h>
@@ -38,16 +39,26 @@ static inline dma_addr_t dma_map_single(struct device *dev,
 					void *ptr, size_t size,
 					enum dma_data_direction dir)
 {
+	dma_addr_t addr = virt_to_phys(ptr);
+
 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
 	if (dev->bus == &pci_bus_type)
-		return virt_to_phys(ptr);
+		return addr;
 #endif
 	dma_cache_sync(dev, ptr, size, dir);
 
-	return virt_to_phys(ptr);
+	debug_dma_map_page(dev, virt_to_page(ptr),
+			   (unsigned long)ptr & ~PAGE_MASK, size,
+			   dir, addr, true);
+
+	return addr;
 }
 
-#define dma_unmap_single(dev, addr, size, dir)	do { } while (0)
+static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
+				    size_t size, enum dma_data_direction dir)
+{
+	debug_dma_unmap_page(dev, addr, size, dir, true);
+}
 
 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
 			     int nents, enum dma_data_direction dir)
@@ -59,12 +70,19 @@ static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
 		dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
 #endif
 		sg[i].dma_address = sg_phys(&sg[i]);
+		sg[i].dma_length = sg[i].length;
 	}
 
+	debug_dma_map_sg(dev, sg, nents, i, dir);
+
 	return nents;
 }
 
-#define dma_unmap_sg(dev, sg, nents, dir)	do { } while (0)
+static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+				int nents, enum dma_data_direction dir)
+{
+	debug_dma_unmap_sg(dev, sg, nents, dir);
+}
 
 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
 				      unsigned long offset, size_t size,
@@ -111,6 +129,7 @@ static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
 		dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
 #endif
 		sg[i].dma_address = sg_phys(&sg[i]);
+		sg[i].dma_length = sg[i].length;
 	}
 }
 
@@ -119,6 +138,7 @@ static inline void dma_sync_single_for_cpu(struct device *dev,
 					   enum dma_data_direction dir)
 {
 	dma_sync_single(dev, dma_handle, size, dir);
+	debug_dma_sync_single_for_cpu(dev, dma_handle, size, dir);
 }
 
 static inline void dma_sync_single_for_device(struct device *dev,
@@ -127,6 +147,7 @@ static inline void dma_sync_single_for_device(struct device *dev,
 					      enum dma_data_direction dir)
 {
 	dma_sync_single(dev, dma_handle, size, dir);
+	debug_dma_sync_single_for_device(dev, dma_handle, size, dir);
 }
 
 static inline void dma_sync_single_range_for_cpu(struct device *dev,
@@ -136,6 +157,8 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev,
 						 enum dma_data_direction direction)
 {
 	dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
+	debug_dma_sync_single_range_for_cpu(dev, dma_handle,
+					    offset, size, direction);
 }
 
 static inline void dma_sync_single_range_for_device(struct device *dev,
@@ -145,6 +168,8 @@ static inline void dma_sync_single_range_for_device(struct device *dev,
 						    enum dma_data_direction direction)
 {
 	dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+	debug_dma_sync_single_range_for_device(dev, dma_handle,
+					       offset, size, direction);
 }
 
 
@@ -153,6 +178,7 @@ static inline void dma_sync_sg_for_cpu(struct device *dev,
 				       enum dma_data_direction dir)
 {
 	dma_sync_sg(dev, sg, nelems, dir);
+	debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
 }
 
 static inline void dma_sync_sg_for_device(struct device *dev,
@@ -160,9 +186,9 @@ static inline void dma_sync_sg_for_device(struct device *dev,
 					  enum dma_data_direction dir)
 {
 	dma_sync_sg(dev, sg, nelems, dir);
+	debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
 }
 
-
 static inline int dma_get_cache_alignment(void)
 {
 	/*
diff --git a/arch/sh/include/asm/scatterlist.h b/arch/sh/include/asm/scatterlist.h
index 2084d037369..c693d268a41 100644
--- a/arch/sh/include/asm/scatterlist.h
+++ b/arch/sh/include/asm/scatterlist.h
@@ -5,12 +5,13 @@
 
 struct scatterlist {
 #ifdef CONFIG_DEBUG_SG
-    unsigned long sg_magic;
+	unsigned long	sg_magic;
 #endif
-    unsigned long page_link;
-    unsigned int offset;/* for highmem, page offset */
-    dma_addr_t dma_address;
-    unsigned int length;
+	unsigned long	page_link;
+	unsigned int	offset;		/* for highmem, page offset */
+	unsigned int	length;
+	dma_addr_t	dma_address;
+	unsigned int	dma_length;
 };
 
 #define ISA_DMA_THRESHOLD	PHYS_ADDR_MASK