From: Will Davis <wdavis@xxxxxxxxxx>
Add debug callbacks for the new dma_map_resource and dma_unmap_resource
functions.
Signed-off-by: Will Davis <wdavis@xxxxxxxxxx>
Reviewed-by: Terence Ripperda <tripperda@xxxxxxxxxx>
Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
---
include/linux/dma-debug.h | 20 ++++++++++++++++++++
lib/dma-debug.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index fe8cb61..19f328c 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -44,6 +44,13 @@ extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction, bool map_single);
+extern void debug_dma_map_resource(struct device *dev, struct resource *res,
+ size_t offset, size_t size, int direction,
+ dma_addr_t dma_addr);
+
+extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t addr,
+ size_t size, int direction);
+
extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction);
@@ -120,6 +127,19 @@ static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
{
}
+static inline void debug_dma_map_resource(struct device *dev,
+ struct resource *res, size_t offset,
+ size_t size, int direction,
+ dma_addr_t dma_addr)
+{
+}
+
+static inline void debug_dma_unmap_resource(struct device *dev,
+ dma_addr_t addr, size_t size,
+ int direction)
+{
+}
+
static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction)
{
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index ae4b65e..0ef092f 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -43,6 +43,7 @@ enum {
dma_debug_page,
dma_debug_sg,
dma_debug_coherent,
+ dma_debug_resource,
};
enum map_err_types {
@@ -1348,6 +1349,53 @@ void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
}
EXPORT_SYMBOL(debug_dma_unmap_page);
+void debug_dma_map_resource(struct device *dev, struct resource *resource,
+ size_t offset, size_t size, int direction,
+ dma_addr_t dma_addr)
+{
+ struct dma_debug_entry *entry;
+
+ if (unlikely(dma_debug_disabled()))
+ return;
+
+ if (dma_mapping_error(dev, dma_addr))
+ return;
+
+ entry = dma_entry_alloc();
+ if (!entry)
+ return;
+
+ entry->dev = dev;
+ entry->type = dma_debug_resource;
+ entry->pfn = resource->start >> PAGE_SHIFT;
+ entry->offset = offset,
+ entry->dev_addr = dma_addr;
+ entry->size = size;
+ entry->direction = direction;
+ entry->map_err_type = MAP_ERR_NOT_CHECKED;
+
+ add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_dma_map_resource);
+
+void debug_dma_unmap_resource(struct device *dev, dma_addr_t addr,
+ size_t size, int direction)
+{
+ struct dma_debug_entry ref = {
+ .type = dma_debug_resource,
+ .dev = dev,
+ .dev_addr = addr,
+ .size = size,
+ .direction = direction,
+ };
+
+ if (unlikely(dma_debug_disabled()))
+ return;
+
+ check_unmap(&ref);
+}
+EXPORT_SYMBOL(debug_dma_unmap_resource);
+
void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, int mapped_ents, int direction)
{
--
2.3.7
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