Commit 451d7400 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Ingo Molnar
Browse files

sparc: Add CONFIG_DMA_API_DEBUG support 



All we need to do for CONFIG_DMA_API_DEBUG support is call
dma_debug_init() in DMA code common for SPARC32 and SPARC64.

Now SPARC32 uses two dma_map_ops structures for pci and sbus so
there is not much dma stuff for SPARC32 in kernel/dma.c.
kernel/ioport.c also includes dma stuff for SPARC32. So let's
put all the dma stuff for SPARC32 in kernel/ioport.c and make
kernel/dma.c common for SPARC32 and SPARC64.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: default avatarRobert Reif <reif@earthlink.net>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1249872797-1314-9-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent ee664a92

arch/sparc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ config SPARC 
	select RTC_CLASS

	select RTC_DRV_M48T59

	select HAVE_DMA_ATTRS

	select HAVE_DMA_API_DEBUG



config SPARC32

	def_bool !64BIT

arch/sparc/include/asm/dma-mapping.h

+5 −1
Original line number Diff line number Diff line
@@ -32,8 +32,11 @@ static inline void *dma_alloc_coherent(struct device *dev, size_t size, 
				       dma_addr_t *dma_handle, gfp_t flag)

{

	struct dma_map_ops *ops = get_dma_ops(dev);

	void *cpu_addr;



	return ops->alloc_coherent(dev, size, dma_handle, flag);

	cpu_addr = 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,
@@ -41,6 +44,7 @@ static inline void dma_free_coherent(struct device *dev, size_t size, 
{

	struct dma_map_ops *ops = get_dma_ops(dev);



	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);

	ops->free_coherent(dev, size, cpu_addr, dma_handle);

}

arch/sparc/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ obj-$(CONFIG_SPARC64_SMP) += cpumap.o 
obj-$(CONFIG_SPARC32)     += devres.o

devres-y                  := ../../../kernel/irq/devres.o



obj-$(CONFIG_SPARC32)     += dma.o

obj-y                     += dma.o



obj-$(CONFIG_SPARC32_PCI) += pcic.o

arch/sparc/kernel/dma.c

+5 −32
Original line number Diff line number Diff line 
/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.

 *

 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/dma-mapping.h>

#include <linux/scatterlist.h>

#include <linux/mm.h>

#include <linux/dma-debug.h>



#ifdef CONFIG_PCI

#include <linux/pci.h>

#endif

#define PREALLOC_DMA_DEBUG_ENTRIES       (1 << 15)



/*

 * Return whether the given PCI device DMA address mask can be

 * supported properly.  For example, if your device can only drive the

 * low 24-bits during PCI bus mastering, then you would pass

 * 0x00ffffff as the mask to this function.

 */

int dma_supported(struct device *dev, u64 mask)

static int __init dma_init(void)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return 1;

#endif

	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);

	return 0;

}

EXPORT_SYMBOL(dma_supported);



int dma_set_mask(struct device *dev, u64 dma_mask)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_set_dma_mask(to_pci_dev(dev), dma_mask);

#endif

	return -EOPNOTSUPP;

}

EXPORT_SYMBOL(dma_set_mask);
 
fs_initcall(dma_init);

arch/sparc/kernel/ioport.c

+27 −0
Original line number Diff line number Diff line
@@ -654,6 +654,33 @@ EXPORT_SYMBOL(pci32_dma_ops); 


#endif /* CONFIG_PCI */



/*

 * Return whether the given PCI device DMA address mask can be

 * supported properly.  For example, if your device can only drive the

 * low 24-bits during PCI bus mastering, then you would pass

 * 0x00ffffff as the mask to this function.

 */

int dma_supported(struct device *dev, u64 mask)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return 1;

#endif

	return 0;

}

EXPORT_SYMBOL(dma_supported);



int dma_set_mask(struct device *dev, u64 dma_mask)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_set_dma_mask(to_pci_dev(dev), dma_mask);

#endif

	return -EOPNOTSUPP;

}

EXPORT_SYMBOL(dma_set_mask);





#ifdef CONFIG_PROC_FS



static int

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