Commit 944c67df authored by David S. Miller's avatar David S. Miller
Browse files

sparc32: Implement more generic dma_*() interfaces. 



These dispatch to either PCI or SBUS routines based upon
the device bus type.

This will allow us to let SBUS drivers call these routines.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 260489fa

arch/sparc/include/asm/dma-mapping_32.h

+54 −5
Original line number Diff line number Diff line 
#ifndef _ASM_SPARC_DMA_MAPPING_H

#define _ASM_SPARC_DMA_MAPPING_H



#include <linux/types.h>



#ifdef CONFIG_PCI

#include <asm-generic/dma-mapping.h>

#else

#include <asm-generic/dma-mapping-broken.h>

#endif /* PCI */

struct device;

struct scatterlist;

struct page;



#define DMA_ERROR_CODE	(~(dma_addr_t)0x0)



extern int dma_supported(struct device *dev, u64 mask);

extern int dma_set_mask(struct device *dev, u64 dma_mask);

extern void *dma_alloc_coherent(struct device *dev, size_t size,

				dma_addr_t *dma_handle, gfp_t flag);

extern void dma_free_coherent(struct device *dev, size_t size,

			      void *cpu_addr, dma_addr_t dma_handle);

extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,

				 size_t size,

				 enum dma_data_direction direction);

extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,

			     size_t size,

			     enum dma_data_direction direction);

extern dma_addr_t dma_map_page(struct device *dev, struct page *page,

			       unsigned long offset, size_t size,

			       enum dma_data_direction direction);

extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,

			   size_t size, enum dma_data_direction direction);

extern int dma_map_sg(struct device *dev, struct scatterlist *sg,

		      int nents, enum dma_data_direction direction);

extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,

			 int nents, enum dma_data_direction direction);

extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,

				    size_t size,

				    enum dma_data_direction direction);

extern void dma_sync_single_for_device(struct device *dev,

				       dma_addr_t dma_handle,

				       size_t size,

				       enum dma_data_direction direction);

extern void dma_sync_single_range_for_cpu(struct device *dev,

					  dma_addr_t dma_handle,

					  unsigned long offset,

					  size_t size,

					  enum dma_data_direction direction);

extern void dma_sync_single_range_for_device(struct device *dev,

					     dma_addr_t dma_handle,

					     unsigned long offset, size_t size,

					     enum dma_data_direction direction);

extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,

				int nelems, enum dma_data_direction direction);

extern void dma_sync_sg_for_device(struct device *dev,

				   struct scatterlist *sg, int nelems,

				   enum dma_data_direction direction);

extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);

extern int dma_get_cache_alignment(void);



#define dma_alloc_noncoherent	dma_alloc_coherent

#define dma_free_noncoherent	dma_free_coherent



#endif /* _ASM_SPARC_DMA_MAPPING_H */

arch/sparc/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ obj-y := entry.o wof.o wuf.o etrap.o rtrap.o traps.o $(IRQ_OBJS) \ 
	    time.o windows.o cpu.o devices.o \

	    tadpole.o tick14.o ptrace.o \

	    unaligned.o una_asm.o muldiv.o \

	    prom.o of_device.o devres.o

	    prom.o of_device.o devres.o dma.o



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

arch/sparc/kernel/dma.c

0 → 100644
+227 −0
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>



#ifdef CONFIG_PCI

#include <linux/pci.h>

#endif



#include "dma.h"



int dma_supported(struct device *dev, u64 mask)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_dma_supported(to_pci_dev(dev), mask);

#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);



void *dma_alloc_coherent(struct device *dev, size_t size,

			 dma_addr_t *dma_handle, gfp_t flag)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);

#endif

	return sbus_alloc_consistent(dev, size, dma_handle);

}

EXPORT_SYMBOL(dma_alloc_coherent);



void dma_free_coherent(struct device *dev, size_t size,

		       void *cpu_addr, dma_addr_t dma_handle)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_free_consistent(to_pci_dev(dev), size,

				    cpu_addr, dma_handle);

		return;

	}

#endif

	sbus_free_consistent(dev, size, cpu_addr, dma_handle);

}

EXPORT_SYMBOL(dma_free_coherent);



dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,

			  size_t size, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_map_single(to_pci_dev(dev), cpu_addr,

				      size, (int)direction);

#endif

	return sbus_map_single(dev, cpu_addr, size, (int)direction);

}

EXPORT_SYMBOL(dma_map_single);



void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,

		      size_t size,

		      enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_unmap_single(to_pci_dev(dev), dma_addr,

				 size, (int)direction);

		return;

	}

#endif

	sbus_unmap_single(dev, dma_addr, size, (int)direction);

}

EXPORT_SYMBOL(dma_unmap_single);



dma_addr_t dma_map_page(struct device *dev, struct page *page,

			unsigned long offset, size_t size,

			enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_map_page(to_pci_dev(dev), page, offset,

				    size, (int)direction);

#endif

	return sbus_map_single(dev, page_address(page) + offset,

			       size, (int)direction);

}

EXPORT_SYMBOL(dma_map_page);



void dma_unmap_page(struct device *dev, dma_addr_t dma_address,

		    size_t size, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_unmap_page(to_pci_dev(dev), dma_address,

			       size, (int)direction);

		return;

	}

#endif

	sbus_unmap_single(dev, dma_address, size, (int)direction);

}

EXPORT_SYMBOL(dma_unmap_page);



int dma_map_sg(struct device *dev, struct scatterlist *sg,

			     int nents, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type)

		return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);

#endif

	return sbus_map_sg(dev, sg, nents, direction);

}

EXPORT_SYMBOL(dma_map_sg);



void dma_unmap_sg(struct device *dev, struct scatterlist *sg,

		  int nents, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);

		return;

	}

#endif

	sbus_unmap_sg(dev, sg, nents, (int)direction);

}

EXPORT_SYMBOL(dma_unmap_sg);



void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,

			     size_t size, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,

					    size, (int)direction);

		return;

	}

#endif

	sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);

}

EXPORT_SYMBOL(dma_sync_single_for_cpu);



void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,

				size_t size, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,

					       size, (int)direction);

		return;

	}

#endif

	sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);

}

EXPORT_SYMBOL(dma_sync_single_for_device);



void dma_sync_single_range_for_cpu(struct device *dev,

				   dma_addr_t dma_handle,

				   unsigned long offset,

				   size_t size,

				   enum dma_data_direction direction)

{

	dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);

}

EXPORT_SYMBOL(dma_sync_single_range_for_cpu);



void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,

				      unsigned long offset, size_t size,

				      enum dma_data_direction direction)

{

	dma_sync_single_for_device(dev, dma_handle+offset, size, direction);

}

EXPORT_SYMBOL(dma_sync_single_range_for_device);



void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,

			 int nelems, enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,

					nelems, (int)direction);

		return;

	}

#endif

	BUG();

}

EXPORT_SYMBOL(dma_sync_sg_for_cpu);



void dma_sync_sg_for_device(struct device *dev,

			    struct scatterlist *sg, int nelems,

			    enum dma_data_direction direction)

{

#ifdef CONFIG_PCI

	if (dev->bus == &pci_bus_type) {

		pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,

					   nelems, (int)direction);

		return;

	}

#endif

	BUG();

}

EXPORT_SYMBOL(dma_sync_sg_for_device);



int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)

{

	return (dma_addr == DMA_ERROR_CODE);

}

EXPORT_SYMBOL(dma_mapping_error);



int dma_get_cache_alignment(void)

{

	return 32;

}

EXPORT_SYMBOL(dma_get_cache_alignment);

arch/sparc/kernel/dma.h

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+14 −0
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void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp);

void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba);

dma_addr_t sbus_map_single(struct device *dev, void *va,

			   size_t len, int direction);

void sbus_unmap_single(struct device *dev, dma_addr_t ba,

		       size_t n, int direction);

int sbus_map_sg(struct device *dev, struct scatterlist *sg,

		int n, int direction);

void sbus_unmap_sg(struct device *dev, struct scatterlist *sg,

		   int n, int direction);

void sbus_dma_sync_single_for_cpu(struct device *dev, dma_addr_t ba,

				  size_t size, int direction);

void sbus_dma_sync_single_for_device(struct device *dev, dma_addr_t ba,

				     size_t size, int direction);

arch/sparc/kernel/ioport.c

+2 −0
Original line number Diff line number Diff line
@@ -49,6 +49,8 @@ 
#include <asm/iommu.h>

#include <asm/io-unit.h>



#include "dma.h"



#define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */



static struct resource *_sparc_find_resource(struct resource *r,