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>

4 files changed, 51 insertions, 16 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 5e4babecf934..45f4a322ce4a 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -14,6 +14,7 @@ config SUPERH
         select HAVE_GENERIC_DMA_COHERENT
         select HAVE_IOREMAP_PROT if MMU
         select HAVE_ARCH_TRACEHOOK
+        select HAVE_DMA_API_DEBUG
         help
           The SuperH is a RISC processor targeted for use in embedded systems
           and consumer electronics; it was also used in the Sega Dreamcast
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 627315ecdb52..ea9d4f41c9d2 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 2084d0373693..c693d268a413 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
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index edcd5fbf9651..8c9ee855328a 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -12,6 +12,7 @@
 #include <linux/mm.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/dma-debug.h>
 #include <asm/cacheflush.h>
 #include <asm/addrspace.h>
 #include <asm/io.h>
@@ -45,6 +46,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
         split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order);
 
         *dma_handle = virt_to_phys(ret);
+
+        debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache);
+
         return ret_nocache;
 }
 EXPORT_SYMBOL(dma_alloc_coherent);
@@ -56,12 +60,15 @@ void dma_free_coherent(struct device *dev, size_t size,
         unsigned long pfn = dma_handle >> PAGE_SHIFT;
         int k;
 
-        if (!dma_release_from_coherent(dev, order, vaddr)) {
-                WARN_ON(irqs_disabled());       /* for portability */
-                for (k = 0; k < (1 << order); k++)
-                        __free_pages(pfn_to_page(pfn + k), 0);
-                iounmap(vaddr);
-        }
+        WARN_ON(irqs_disabled());       /* for portability */
+
+        if (dma_release_from_coherent(dev, order, vaddr))
+                return;
+
+        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+        for (k = 0; k < (1 << order); k++)
+                __free_pages(pfn_to_page(pfn + k), 0);
+        iounmap(vaddr);
 }
 EXPORT_SYMBOL(dma_free_coherent);