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sh: Add support for DMA API debugging.

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This wires up support for the generic DMA API debugging.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2009-04-09 10:36:54 -07:00
parent b35346fd25
commit f802d969b6
4 changed files with 51 additions and 16 deletions
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19
arch/sh/mm/consistent.c
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@@ -12,6 +12,7 @@
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
#include <asm/cacheflush.h>
#include <asm/addrspace.h>
#include <asm/io.h>
@@ -45,6 +46,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order);
*dma_handle = virt_to_phys(ret);
debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache);
return ret_nocache;
}
EXPORT_SYMBOL(dma_alloc_coherent);
@@ -56,12 +60,15 @@ void dma_free_coherent(struct device *dev, size_t size,
unsigned long pfn = dma_handle >> PAGE_SHIFT;
int k;
if (!dma_release_from_coherent(dev, order, vaddr)) {
WARN_ON(irqs_disabled()); /* for portability */
for (k = 0; k < (1 << order); k++)
__free_pages(pfn_to_page(pfn + k), 0);
iounmap(vaddr);
}
WARN_ON(irqs_disabled()); /* for portability */
if (dma_release_from_coherent(dev, order, vaddr))
return;
debug_dma_free_coherent(dev, size, vaddr, dma_handle);
for (k = 0; k < (1 << order); k++)
__free_pages(pfn_to_page(pfn + k), 0);
iounmap(vaddr);
}
EXPORT_SYMBOL(dma_free_coherent);