[ARM] dma-mapping: provide sync_range APIs
Convert the existing dma_sync_single_for_* APIs to the new range based
APIs, and make the dma_sync_single_for_* API a superset of it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 6f45959..7b95d20 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -351,11 +351,12 @@
/**
- * dma_sync_single_for_cpu
+ * dma_sync_single_range_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
- * @size: size of buffer to map
- * @dir: DMA transfer direction
+ * @offset: offset of region to start sync
+ * @size: size of region to sync
+ * @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Make physical memory consistent for a single streaming mode DMA
* translation after a transfer.
@@ -369,24 +370,40 @@
*/
#ifndef CONFIG_DMABOUNCE
static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ if (!arch_is_coherent())
+ dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
+}
+
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ if (!arch_is_coherent())
+ dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
+}
+#else
+extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
+extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
+#endif
+
+static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
- if (!arch_is_coherent())
- dma_cache_maint(dma_to_virt(dev, handle), size, dir);
+ dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
- if (!arch_is_coherent())
- dma_cache_maint(dma_to_virt(dev, handle), size, dir);
+ dma_sync_single_range_for_device(dev, handle, 0, size, dir);
}
-#else
-extern void dma_sync_single_for_cpu(struct device*, dma_addr_t, size_t, enum dma_data_direction);
-extern void dma_sync_single_for_device(struct device*, dma_addr_t, size_t, enum dma_data_direction);
-#endif
/**