This patch removes the need for offset parameter in dma bounce
functions. This is required to let dma-mapping framework on ARM
architecture use common, generic dma-mapping helpers.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
arch/arm/common/dmabounce.c | 13 +++++--
arch/arm/include/asm/dma-mapping.h | 67 +++++++++++++++++------------------
arch/arm/mm/dma-mapping.c | 4 +-
3 files changed, 45 insertions(+), 39 deletions(-)
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index a1abdc9..c9f54b6 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -173,7 +173,8 @@ find_safe_buffer(struct dmabounce_device_info *device_info, dma_addr_t safe_dma_
read_lock_irqsave(&device_info->lock, flags);
list_for_each_entry(b, &device_info->safe_buffers, node)
- if (b->safe_dma_addr == safe_dma_addr) {
+ if (b->safe_dma_addr <= safe_dma_addr &&
+ b->safe_dma_addr + b->size > safe_dma_addr) {
rb = b;
break;
}
@@ -362,9 +363,10 @@ void __dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
EXPORT_SYMBOL(__dma_unmap_page);
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
- unsigned long off, size_t sz, enum dma_data_direction dir)
+ size_t sz, enum dma_data_direction dir)
{
struct safe_buffer *buf;
+ unsigned long off;
dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
__func__, addr, off, sz, dir);
@@ -373,6 +375,8 @@ int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
if (!buf)
return 1;
+ off = addr - buf->safe_dma_addr;
+
BUG_ON(buf->direction != dir);
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
@@ -391,9 +395,10 @@ int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
EXPORT_SYMBOL(dmabounce_sync_for_cpu);
int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
- unsigned long off, size_t sz, enum dma_data_direction dir)
+ size_t sz, enum dma_data_direction dir)
{
struct safe_buffer *buf;
+ unsigned long off;
dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
__func__, addr, off, sz, dir);
@@ -402,6 +407,8 @@ int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
if (!buf)
return 1;
+ off = addr - buf->safe_dma_addr;
+
BUG_ON(buf->direction != dir);
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 3dbec1d..02d651f 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -266,19 +266,17 @@ extern void __dma_unmap_page(struct device *, dma_addr_t, size_t,
/*
* Private functions
*/
-int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long,
- size_t, enum dma_data_direction);
-int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
- size_t, enum dma_data_direction);
+int dmabounce_sync_for_cpu(struct device *, dma_addr_t, size_t, enum dma_data_direction);
+int dmabounce_sync_for_device(struct device *, dma_addr_t, size_t, enum dma_data_direction);
#else
static inline int dmabounce_sync_for_cpu(struct device *d, dma_addr_t addr,
- unsigned long offset, size_t size, enum dma_data_direction dir)
+ size_t size, enum dma_data_direction dir)
{
return 1;
}
static inline int dmabounce_sync_for_device(struct device *d, dma_addr_t addr,
- unsigned long offset, size_t size, enum dma_data_direction dir)
+ size_t size, enum dma_data_direction dir)
{
return 1;
}
@@ -401,6 +399,33 @@ static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
__dma_unmap_page(dev, handle, size, dir);
}
+
+static inline void dma_sync_single_for_cpu(struct device *dev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+ BUG_ON(!valid_dma_direction(dir));
+
+ debug_dma_sync_single_for_cpu(dev, handle, size, dir);
+
+ if (!dmabounce_sync_for_cpu(dev, handle, size, dir))
+ return;
+
+ __dma_single_dev_to_cpu(dma_to_virt(dev, handle), 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)
+{
+ BUG_ON(!valid_dma_direction(dir));
+
+ debug_dma_sync_single_for_device(dev, handle, size, dir);
+
+ if (!dmabounce_sync_for_device(dev, handle, size, dir))
+ return;
+
+ __dma_single_cpu_to_dev(dma_to_virt(dev, handle), size, dir);
+}
+
/**
* dma_sync_single_range_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
@@ -423,40 +448,14 @@ 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)
{
- BUG_ON(!valid_dma_direction(dir));
-
- debug_dma_sync_single_for_cpu(dev, handle + offset, size, dir);
-
- if (!dmabounce_sync_for_cpu(dev, handle, offset, size, dir))
- return;
-
- __dma_single_dev_to_cpu(dma_to_virt(dev, handle) + offset, size, dir);
+ dma_sync_single_for_cpu(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)
{
- BUG_ON(!valid_dma_direction(dir));
-
- debug_dma_sync_single_for_device(dev, handle + offset, size, dir);
-
- if (!dmabounce_sync_for_device(dev, handle, offset, size, dir))
- return;
-
- __dma_single_cpu_to_dev(dma_to_virt(dev, handle) + offset, size, dir);
-}
-
-static inline void dma_sync_single_for_cpu(struct device *dev,
- dma_addr_t handle, size_t size, enum dma_data_direction 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)
-{
- dma_sync_single_range_for_device(dev, handle, 0, size, dir);
+ dma_sync_single_for_device(dev, handle + offset, size, dir);
}
/*
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 8762d5a..ed16a7b 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -657,7 +657,7 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int i;
for_each_sg(sg, s, nents, i) {
- if (!dmabounce_sync_for_cpu(dev, sg_dma_address(s), 0,
+ if (!dmabounce_sync_for_cpu(dev, sg_dma_address(s),
sg_dma_len(s), dir))
continue;
@@ -683,7 +683,7 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int i;
for_each_sg(sg, s, nents, i) {
- if (!dmabounce_sync_for_device(dev, sg_dma_address(s), 0,
+ if (!dmabounce_sync_for_device(dev, sg_dma_address(s),
sg_dma_len(s), dir))
continue;
--
1.7.1.569.g6f426
--
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