From 4f29c057aa81c5440f06b716f768ba9f8a041fe9 Mon Sep 17 00:00:00 2001
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Fri, 23 Jan 2009 00:42:11 +0900
Subject: [PATCH] MIPS: Synchronize dma_map_page and dma_map_single
Synchronize dma_map_page/dma_unmap_page and dma_map_single/dma_unmap_single.
This will reduce unnecessary writebacks and invalidates.
[Ralf: make dma_unmap_page an inline function.]
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/include/asm/dma-mapping.h | 9 +++++++--
arch/mips/mm/dma-default.c | 19 +------------------
2 files changed, 8 insertions(+), 20 deletions(-)
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index c64afb40cd069..d16afddb09a9f 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -24,8 +24,13 @@ extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction);
extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction);
-extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
- size_t size, enum dma_data_direction direction);
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+ size_t size, enum dma_data_direction direction)
+{
+ dma_unmap_single(dev, dma_address, size, direction);
+}
+
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nhwentries, enum dma_data_direction direction);
extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index bed56f1ac8370..4fdb7f5216b9d 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -209,7 +209,7 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long addr;
addr = (unsigned long) page_address(page) + offset;
- dma_cache_wback_inv(addr, size);
+ __dma_sync(addr, size, direction);
}
return plat_map_dma_mem_page(dev, page) + offset;
@@ -217,23 +217,6 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
EXPORT_SYMBOL(dma_map_page);
-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(direction == DMA_NONE);
-
- if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {
- unsigned long addr;
-
- addr = dma_addr_to_virt(dma_address);
- dma_cache_wback_inv(addr, size);
- }
-
- plat_unmap_dma_mem(dev, dma_address);
-}
-
-EXPORT_SYMBOL(dma_unmap_page);
-
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
--
2.30.2