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Diffstat (limited to 'arch/arm/common/dmabounce.c')
-rw-r--r--arch/arm/common/dmabounce.c56
1 files changed, 29 insertions, 27 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index 69130f36590..aecc6c3f908 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -246,9 +246,9 @@ map_single(struct device *dev, void *ptr, size_t size,
}
dev_dbg(dev,
- "%s: unsafe buffer %p (phy=%p) mapped to %p (phy=%p)\n",
- __func__, buf->ptr, (void *) virt_to_dma(dev, buf->ptr),
- buf->safe, (void *) buf->safe_dma_addr);
+ "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
+ __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
+ buf->safe, buf->safe_dma_addr);
if ((dir == DMA_TO_DEVICE) ||
(dir == DMA_BIDIRECTIONAL)) {
@@ -292,9 +292,9 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
BUG_ON(buf->size != size);
dev_dbg(dev,
- "%s: unsafe buffer %p (phy=%p) mapped to %p (phy=%p)\n",
- __func__, buf->ptr, (void *) virt_to_dma(dev, buf->ptr),
- buf->safe, (void *) buf->safe_dma_addr);
+ "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
+ __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
+ buf->safe, buf->safe_dma_addr);
DO_STATS ( device_info->bounce_count++ );
@@ -321,9 +321,8 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
}
}
-static inline void
-sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
+static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
struct safe_buffer *buf = NULL;
@@ -355,9 +354,9 @@ sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
*/
dev_dbg(dev,
- "%s: unsafe buffer %p (phy=%p) mapped to %p (phy=%p)\n",
- __func__, buf->ptr, (void *) virt_to_dma(dev, buf->ptr),
- buf->safe, (void *) buf->safe_dma_addr);
+ "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
+ __func__, buf->ptr, virt_to_dma(dev, buf->ptr),
+ buf->safe, buf->safe_dma_addr);
DO_STATS ( device_info->bounce_count++ );
@@ -383,8 +382,9 @@ sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
* No need to sync the safe buffer - it was allocated
* via the coherent allocators.
*/
+ return 0;
} else {
- dma_cache_maint(dma_to_virt(dev, dma_addr), size, dir);
+ return 1;
}
}
@@ -474,25 +474,29 @@ dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
}
}
-void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
+void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_addr,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
{
- dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
- __func__, (void *) dma_addr, size, dir);
+ dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
+ __func__, dma_addr, offset, size, dir);
- sync_single(dev, dma_addr, size, dir);
+ if (sync_single(dev, dma_addr, offset + size, dir))
+ dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
}
+EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
-void
-dma_sync_single_for_device(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction dir)
+void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
{
- dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
- __func__, (void *) dma_addr, size, dir);
+ dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
+ __func__, dma_addr, offset, size, dir);
- sync_single(dev, dma_addr, size, dir);
+ if (sync_single(dev, dma_addr, offset + size, dir))
+ dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
}
+EXPORT_SYMBOL(dma_sync_single_range_for_device);
void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
@@ -644,8 +648,6 @@ EXPORT_SYMBOL(dma_map_single);
EXPORT_SYMBOL(dma_unmap_single);
EXPORT_SYMBOL(dma_map_sg);
EXPORT_SYMBOL(dma_unmap_sg);
-EXPORT_SYMBOL(dma_sync_single_for_cpu);
-EXPORT_SYMBOL(dma_sync_single_for_device);
EXPORT_SYMBOL(dma_sync_sg_for_cpu);
EXPORT_SYMBOL(dma_sync_sg_for_device);
EXPORT_SYMBOL(dmabounce_register_dev);