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powerpc: Add CONFIG_DMA_API_DEBUG support 

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
FUJITA Tomonori 2009-08-04 19:08:28 +00:00 committed by Benjamin Herrenschmidt
parent 4a9a6bfe70
commit 80d3e8abb7
3 changed files with 22 additions and 1 deletions
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1
arch/powerpc/Kconfig
View File

@ -121,6 +121,7 @@ config PPC
select HAVE_ARCH_TRACEHOOK
select HAVE_LMB
select HAVE_DMA_ATTRS
select HAVE_DMA_API_DEBUG
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_OPROFILE
select HAVE_SYSCALL_WRAPPERS if PPC64

11
arch/powerpc/include/asm/dma-mapping.h
View File

@ -127,9 +127,15 @@ static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
struct dma_map_ops *dma_ops = get_dma_ops(dev);
void *cpu_addr;
BUG_ON(!dma_ops);
return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
cpu_addr = dma_ops->alloc_coherent(dev, size, dma_handle, flag);
debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
return cpu_addr;
}
static inline void dma_free_coherent(struct device *dev, size_t size,
@ -138,6 +144,9 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
struct dma_map_ops *dma_ops = get_dma_ops(dev);
BUG_ON(!dma_ops);
debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
}

11
arch/powerpc/kernel/dma.c
View File

@ -7,6 +7,7 @@
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
#include <linux/lmb.h>
#include <asm/bug.h>
#include <asm/abs_addr.h>
@ -156,3 +157,13 @@ struct dma_map_ops dma_direct_ops = {
#endif
};
EXPORT_SYMBOL(dma_direct_ops);
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
static int __init dma_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
return 0;
}
fs_initcall(dma_init);