TononixOS/ubports_kernel_google_msm
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ARM: dma-mapping: move all dma bounce code to separate dma ops structure

Browse Source 
This patch removes dma bounce hooks from the common dma mapping
implementation on ARM architecture and creates a separate set of
dma_map_ops for dma bounce devices.

Change-Id: I42d7869b4f74ffa5f36a4a7526bc0c55aaf6bab7
[lauraa: conflicts due to code cruft]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-By: Subash Patel <subash.ramaswamy@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Marek Szyprowski
2012-02-10 19:55:20 +01:00
committed by Stephen Boyd
parent 3f47a1438c
commit 0e8fe4a111
3 changed files with 120 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
arch/arm/common/dmabounce.c
View File

@@ -308,8 +308,9 @@ static inline void unmap_single(struct device *dev, struct safe_buffer *buf,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
dma_addr_t __dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
struct dma_attrs *attrs)
{
dma_addr_t dma_addr;
int ret;
@@ -324,7 +325,7 @@ dma_addr_t __dma_map_page(struct device *dev, struct page *page,
return DMA_ERROR_CODE;
if (ret == 0) {
__dma_page_cpu_to_dev(page, offset, size, dir);
arm_dma_ops.sync_single_for_device(dev, dma_addr, size, dir);
return dma_addr;
}
@@ -335,7 +336,6 @@ dma_addr_t __dma_map_page(struct device *dev, struct page *page,
return map_single(dev, page_address(page) + offset, size, dir);
}
EXPORT_SYMBOL(__dma_map_page);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
@@ -343,8 +343,8 @@ EXPORT_SYMBOL(__dma_map_page);
* the safe buffer. (basically return things back to the way they
* should be)
*/
void __dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
static void dmabounce_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
struct safe_buffer *buf;
@@ -353,16 +353,14 @@ void __dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
buf = find_safe_buffer_dev(dev, dma_addr, __func__);
if (!buf) {
__dma_page_dev_to_cpu(pfn_to_page(dma_to_pfn(dev, dma_addr)),
dma_addr & ~PAGE_MASK, size, dir);
arm_dma_ops.sync_single_for_cpu(dev, dma_addr, size, dir);
return;
}
unmap_single(dev, buf, size, dir);
}
EXPORT_SYMBOL(__dma_unmap_page);
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
static int __dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
size_t sz, enum dma_data_direction dir)
{
struct safe_buffer *buf;
@@ -392,9 +390,17 @@ int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
}
return 0;
}
EXPORT_SYMBOL(dmabounce_sync_for_cpu);
int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
static void dmabounce_sync_for_cpu(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
if (!__dmabounce_sync_for_cpu(dev, handle, size, dir))
return;
arm_dma_ops.sync_single_for_cpu(dev, handle, size, dir);
}
static int __dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
size_t sz, enum dma_data_direction dir)
{
struct safe_buffer *buf;
@@ -424,7 +430,35 @@ int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
}
return 0;
}
EXPORT_SYMBOL(dmabounce_sync_for_device);
static void dmabounce_sync_for_device(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
if (!__dmabounce_sync_for_device(dev, handle, size, dir))
return;
arm_dma_ops.sync_single_for_device(dev, handle, size, dir);
}
static int dmabounce_set_mask(struct device *dev, u64 dma_mask)
{
if (dev->archdata.dmabounce)
return 0;
return arm_dma_ops.set_dma_mask(dev, dma_mask);
}
static struct dma_map_ops dmabounce_ops = {
.map_page = dmabounce_map_page,
.unmap_page = dmabounce_unmap_page,
.sync_single_for_cpu = dmabounce_sync_for_cpu,
.sync_single_for_device = dmabounce_sync_for_device,
.map_sg = arm_dma_map_sg,
.unmap_sg = arm_dma_unmap_sg,
.sync_sg_for_cpu = arm_dma_sync_sg_for_cpu,
.sync_sg_for_device = arm_dma_sync_sg_for_device,
.set_dma_mask = dmabounce_set_mask,
};
static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,
const char *name, unsigned long size)
@@ -486,6 +520,7 @@ int dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
#endif
dev->archdata.dmabounce = device_info;
set_dma_ops(dev, &dmabounce_ops);
dev_info(dev, "dmabounce: registered device\n");
@@ -504,6 +539,7 @@ void dmabounce_unregister_dev(struct device *dev)
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
dev->archdata.dmabounce = NULL;
set_dma_ops(dev, NULL);
if (!device_info) {
dev_warn(dev,