Commit 9a88cbb5 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32} 



Platforms will now have to supply a function dma_device_is_coherent which
returns if a particular device participates in the coherence domain.  For
most platforms this function will always return 0 or 1.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent f65e4fa8

arch/mips/Kconfig

+0 −5
Original line number Diff line number Diff line
@@ -598,8 +598,6 @@ config SGI_IP32 
	select ARC

	select ARC32

	select BOOT_ELF32

	select OWN_DMA

	select DMA_IP32

	select DMA_NONCOHERENT

	select HW_HAS_PCI

	select R5000_CPU_SCACHE
@@ -883,9 +881,6 @@ config DMA_NONCOHERENT 
config DMA_NEED_PCI_MAP_STATE

	bool



config OWN_DMA

	bool



config EARLY_PRINTK

	bool

arch/mips/mm/Makefile

+2 −12
Original line number Diff line number Diff line
@@ -2,8 +2,8 @@ 
# Makefile for the Linux/MIPS-specific parts of the memory manager.

#



obj-y				+= cache.o extable.o fault.o init.o pgtable.o \

				   tlbex.o tlbex-fault.o

obj-y				+= cache.o dma-default.o extable.o fault.o \

				   init.o pgtable.o tlbex.o tlbex-fault.o



obj-$(CONFIG_32BIT)		+= ioremap.o pgtable-32.o

obj-$(CONFIG_64BIT)		+= pgtable-64.o
@@ -32,14 +32,4 @@ obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o 
obj-$(CONFIG_RM7000_CPU_SCACHE)	+= sc-rm7k.o

obj-$(CONFIG_MIPS_CPU_SCACHE)	+= sc-mips.o



#

# Choose one DMA coherency model

#

ifndef CONFIG_OWN_DMA

obj-$(CONFIG_DMA_COHERENT)	+= dma-coherent.o

obj-$(CONFIG_DMA_NONCOHERENT)	+= dma-noncoherent.o

endif

obj-$(CONFIG_DMA_IP27)		+= dma-ip27.o

obj-$(CONFIG_DMA_IP32)		+= dma-ip32.o



EXTRA_AFLAGS := $(CFLAGS)

arch/mips/mm/dma-coherent.c

deleted100644 → 0
+0 −254
Original line number Diff line number Diff line 
/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>

 * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>

 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.

 */

#include <linux/types.h>

#include <linux/dma-mapping.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/string.h>



#include <asm/cache.h>

#include <asm/io.h>



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

	dma_addr_t * dma_handle, gfp_t gfp)

{

	void *ret;

	/* ignore region specifiers */

	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);



	if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))

		gfp |= GFP_DMA;

	ret = (void *) __get_free_pages(gfp, get_order(size));



	if (ret != NULL) {

		memset(ret, 0, size);

		*dma_handle = virt_to_phys(ret);

	}



	return ret;

}



EXPORT_SYMBOL(dma_alloc_noncoherent);



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

	dma_addr_t * dma_handle, gfp_t gfp)

	__attribute__((alias("dma_alloc_noncoherent")));



EXPORT_SYMBOL(dma_alloc_coherent);



void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,

	dma_addr_t dma_handle)

{

	unsigned long addr = (unsigned long) vaddr;



	free_pages(addr, get_order(size));

}



EXPORT_SYMBOL(dma_free_noncoherent);



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

	dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));



EXPORT_SYMBOL(dma_free_coherent);



dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,

	enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);



	return __pa(ptr);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_unmap_single);



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

	enum dma_data_direction direction)

{

	int i;



	BUG_ON(direction == DMA_NONE);



	for (i = 0; i < nents; i++, sg++) {

		sg->dma_address = (dma_addr_t)page_to_phys(sg->page) + sg->offset;

	}



	return nents;

}



EXPORT_SYMBOL(dma_map_sg);



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

	unsigned long offset, size_t size, enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);



	return page_to_phys(page) + offset;

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_unmap_page);



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

	     enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_sync_sg_for_device);



int dma_mapping_error(dma_addr_t dma_addr)

{

	return 0;

}



EXPORT_SYMBOL(dma_mapping_error);



int dma_supported(struct device *dev, u64 mask)

{

	/*

	 * we fall back to GFP_DMA when the mask isn't all 1s,

	 * so we can't guarantee allocations that must be

	 * within a tighter range than GFP_DMA..

	 */

	if (mask < 0x00ffffff)

		return 0;



	return 1;

}



EXPORT_SYMBOL(dma_supported);



int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)

{

	return 1;

}



EXPORT_SYMBOL(dma_is_consistent);



void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

	       enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_cache_sync);



/* The DAC routines are a PCIism.. */



#ifdef CONFIG_PCI



#include <linux/pci.h>



dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,

	struct page *page, unsigned long offset, int direction)

{

	return (dma64_addr_t)page_to_phys(page) + offset;

}



EXPORT_SYMBOL(pci_dac_page_to_dma);



struct page *pci_dac_dma_to_page(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	return mem_map + (dma_addr >> PAGE_SHIFT);

}



EXPORT_SYMBOL(pci_dac_dma_to_page);



unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	return dma_addr & ~PAGE_MASK;

}



EXPORT_SYMBOL(pci_dac_dma_to_offset);



void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);



void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);



#endif /* CONFIG_PCI */

arch/mips/mm/dma-noncoherent.c→arch/mips/mm/dma-default.c

+101 −108
Original line number Diff line number Diff line
@@ -4,28 +4,39 @@ 
 * for more details.

 *

 * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>

 * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>

 * Copyright (C) 2000, 2001, 06  Ralf Baechle <ralf@linux-mips.org>

 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.

 */



#include <linux/types.h>

#include <linux/dma-mapping.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/string.h>

#include <linux/dma-mapping.h>



#include <asm/cache.h>

#include <asm/io.h>



#include <dma-coherence.h>



/*

 * Warning on the terminology - Linux calls an uncached area coherent;

 * MIPS terminology calls memory areas with hardware maintained coherency

 * coherent.

 */



static inline int cpu_is_noncoherent_r10000(struct device *dev)

{

	return !plat_device_is_coherent(dev) &&

	       (current_cpu_data.cputype == CPU_R10000 &&

	       current_cpu_data.cputype == CPU_R12000);

}



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

	dma_addr_t * dma_handle, gfp_t gfp)

{

	void *ret;



	/* ignore region specifiers */

	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
@@ -35,7 +46,7 @@ void *dma_alloc_noncoherent(struct device *dev, size_t size, 


	if (ret != NULL) {

		memset(ret, 0, size);

		*dma_handle = virt_to_phys(ret);

		*dma_handle = plat_map_dma_mem(dev, ret, size);

	}



	return ret;
@@ -48,11 +59,22 @@ void *dma_alloc_coherent(struct device *dev, size_t size, 
{

	void *ret;



	ret = dma_alloc_noncoherent(dev, size, dma_handle, gfp);

	/* ignore region specifiers */

	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);



	if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))

		gfp |= GFP_DMA;

	ret = (void *) __get_free_pages(gfp, get_order(size));



	if (ret) {

		memset(ret, 0, size);

		*dma_handle = plat_map_dma_mem(dev, ret, size);



		if (!plat_device_is_coherent(dev)) {

			dma_cache_wback_inv((unsigned long) ret, size);

			ret = UNCAC_ADDR(ret);

		}

	}



	return ret;

}
@@ -72,7 +94,9 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr, 
{

	unsigned long addr = (unsigned long) vaddr;



	if (!plat_device_is_coherent(dev))

		addr = CAC_ADDR(addr);



	free_pages(addr, get_order(size));

}
@@ -104,9 +128,10 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, 
{

	unsigned long addr = (unsigned long) ptr;



	if (!plat_device_is_coherent(dev))

		__dma_sync(addr, size, direction);



	return virt_to_phys(ptr);

	return plat_map_dma_mem(dev, ptr, size);

}



EXPORT_SYMBOL(dma_map_single);
@@ -114,10 +139,11 @@ 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)

{

	unsigned long addr;

	addr = dma_addr + PAGE_OFFSET;

	if (cpu_is_noncoherent_r10000(dev))

		__dma_sync(plat_dma_addr_to_phys(dma_addr) + PAGE_OFFSET, size,

		           direction);



	//__dma_sync(addr, size, direction);

	plat_unmap_dma_mem(dma_addr);

}



EXPORT_SYMBOL(dma_unmap_single);
@@ -133,11 +159,10 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 
		unsigned long addr;



		addr = (unsigned long) page_address(sg->page);

		if (addr) {

		if (!plat_device_is_coherent(dev) && addr)

			__dma_sync(addr + sg->offset, sg->length, direction);

			sg->dma_address = (dma_addr_t)page_to_phys(sg->page)

					  + sg->offset;

		}

		sg->dma_address = plat_map_dma_mem_page(dev, sg->page) +

		                  sg->offset;

	}



	return nents;
@@ -148,14 +173,16 @@ EXPORT_SYMBOL(dma_map_sg); 
dma_addr_t dma_map_page(struct device *dev, struct page *page,

	unsigned long offset, size_t size, enum dma_data_direction direction)

{

	unsigned long addr;



	BUG_ON(direction == DMA_NONE);



	if (!plat_device_is_coherent(dev)) {

		unsigned long addr;



		addr = (unsigned long) page_address(page) + offset;

		dma_cache_wback_inv(addr, size);

	}



	return page_to_phys(page) + offset;

	return plat_map_dma_mem_page(dev, page) + offset;

}



EXPORT_SYMBOL(dma_map_page);
@@ -165,12 +192,14 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, 
{

	BUG_ON(direction == DMA_NONE);



	if (direction != DMA_TO_DEVICE) {

	if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {

		unsigned long addr;



		addr = dma_address + PAGE_OFFSET;

		addr = plat_dma_addr_to_phys(dma_address);

		dma_cache_wback_inv(addr, size);

	}



	plat_unmap_dma_mem(dma_address);

}



EXPORT_SYMBOL(dma_unmap_page);
@@ -183,13 +212,15 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, 


	BUG_ON(direction == DMA_NONE);



	if (direction == DMA_TO_DEVICE)

		return;



	for (i = 0; i < nhwentries; i++, sg++) {

		if (!plat_device_is_coherent(dev) &&

		    direction != DMA_TO_DEVICE) {

			addr = (unsigned long) page_address(sg->page);

			if (addr)

			__dma_sync(addr + sg->offset, sg->length, direction);

				__dma_sync(addr + sg->offset, sg->length,

				           direction);

		}

		plat_unmap_dma_mem(sg->dma_address);

	}

}
@@ -198,38 +229,44 @@ 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)

{

	unsigned long addr;



	BUG_ON(direction == DMA_NONE);



	addr = dma_handle + PAGE_OFFSET;

	if (cpu_is_noncoherent_r10000(dev)) {

		unsigned long addr;



		addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);

		__dma_sync(addr, size, 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)

{

	unsigned long addr;



	BUG_ON(direction == DMA_NONE);



	addr = dma_handle + PAGE_OFFSET;

	if (cpu_is_noncoherent_r10000(dev)) {

		unsigned long addr;



		addr = plat_dma_addr_to_phys(dma_handle);

		__dma_sync(addr, size, 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)

{

	unsigned long addr;



	BUG_ON(direction == DMA_NONE);



	addr = dma_handle + offset + PAGE_OFFSET;

	__dma_sync(addr, size, direction);

	if (cpu_is_noncoherent_r10000(dev)) {

		unsigned long addr;



		addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);

		__dma_sync(addr + offset, size, direction);

	}

}



EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
@@ -237,12 +274,14 @@ 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)

{

	unsigned long addr;



	BUG_ON(direction == DMA_NONE);



	addr = dma_handle + offset + PAGE_OFFSET;

	__dma_sync(addr, size, direction);

	if (cpu_is_noncoherent_r10000(dev)) {

		unsigned long addr;



		addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);

		__dma_sync(addr + offset, size, direction);

	}

}



EXPORT_SYMBOL(dma_sync_single_range_for_device);
@@ -255,9 +294,12 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, 
	BUG_ON(direction == DMA_NONE);



	/* Make sure that gcc doesn't leave the empty loop body.  */

	for (i = 0; i < nelems; i++, sg++)

	for (i = 0; i < nelems; i++, sg++) {

		if (!plat_device_is_coherent(dev))

			__dma_sync((unsigned long)page_address(sg->page),

			           sg->length, direction);

		plat_unmap_dma_mem(sg->dma_address);

	}

}



EXPORT_SYMBOL(dma_sync_sg_for_cpu);
@@ -270,9 +312,12 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nele 
	BUG_ON(direction == DMA_NONE);



	/* Make sure that gcc doesn't leave the empty loop body.  */

	for (i = 0; i < nelems; i++, sg++)

	for (i = 0; i < nelems; i++, sg++) {

		if (!plat_device_is_coherent(dev))

			__dma_sync((unsigned long)page_address(sg->page),

			           sg->length, direction);

		plat_unmap_dma_mem(sg->dma_address);

	}

}



EXPORT_SYMBOL(dma_sync_sg_for_device);
@@ -301,7 +346,7 @@ EXPORT_SYMBOL(dma_supported); 


int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)

{

	return 1;

	return plat_device_is_coherent(dev);

}



EXPORT_SYMBOL(dma_is_consistent);
@@ -309,62 +354,10 @@ EXPORT_SYMBOL(dma_is_consistent); 
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

	       enum dma_data_direction direction)

{

	if (direction == DMA_NONE)

		return;

	BUG_ON(direction == DMA_NONE);



	if (!plat_device_is_coherent(dev))

		dma_cache_wback_inv((unsigned long)vaddr, size);

}



EXPORT_SYMBOL(dma_cache_sync);
 


/* The DAC routines are a PCIism.. */



#ifdef CONFIG_PCI



#include <linux/pci.h>



dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,

	struct page *page, unsigned long offset, int direction)

{

	return (dma64_addr_t)page_to_phys(page) + offset;

}



EXPORT_SYMBOL(pci_dac_page_to_dma);



struct page *pci_dac_dma_to_page(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	return mem_map + (dma_addr >> PAGE_SHIFT);

}



EXPORT_SYMBOL(pci_dac_dma_to_page);



unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	return dma_addr & ~PAGE_MASK;

}



EXPORT_SYMBOL(pci_dac_dma_to_offset);



void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);



	dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);



void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);



	dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);



#endif /* CONFIG_PCI */

arch/mips/mm/dma-ip27.c

deleted100644 → 0
+0 −257
Original line number Diff line number Diff line 
/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>

 * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>

 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.

 */

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/string.h>

#include <linux/pci.h>



#include <asm/cache.h>

#include <asm/pci/bridge.h>



#define pdev_to_baddr(pdev, addr) \

	(BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr))

#define dev_to_baddr(dev, addr) \

	pdev_to_baddr(to_pci_dev(dev), (addr))



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

	dma_addr_t * dma_handle, gfp_t gfp)

{

	void *ret;



	/* ignore region specifiers */

	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);



	if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))

		gfp |= GFP_DMA;

	ret = (void *) __get_free_pages(gfp, get_order(size));



	if (ret != NULL) {

		memset(ret, 0, size);

		*dma_handle = dev_to_baddr(dev, virt_to_phys(ret));

	}



	return ret;

}



EXPORT_SYMBOL(dma_alloc_noncoherent);



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

	dma_addr_t * dma_handle, gfp_t gfp)

	__attribute__((alias("dma_alloc_noncoherent")));



EXPORT_SYMBOL(dma_alloc_coherent);



void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,

	dma_addr_t dma_handle)

{

	unsigned long addr = (unsigned long) vaddr;



	free_pages(addr, get_order(size));

}



EXPORT_SYMBOL(dma_free_noncoherent);



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

	dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));



EXPORT_SYMBOL(dma_free_coherent);



dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,

	enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);



	return dev_to_baddr(dev, __pa(ptr));

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_unmap_single);



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

	enum dma_data_direction direction)

{

	int i;



	BUG_ON(direction == DMA_NONE);



	for (i = 0; i < nents; i++, sg++) {

		sg->dma_address = (dma_addr_t) dev_to_baddr(dev,

			page_to_phys(sg->page) + sg->offset);

	}



	return nents;

}



EXPORT_SYMBOL(dma_map_sg);



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

	unsigned long offset, size_t size, enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);



	return dev_to_baddr(dev, page_to_phys(page) + offset);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_unmap_page);



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

	     enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



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)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_sync_sg_for_device);



int dma_mapping_error(dma_addr_t dma_addr)

{

	return 0;

}



EXPORT_SYMBOL(dma_mapping_error);



int dma_supported(struct device *dev, u64 mask)

{

	/*

	 * we fall back to GFP_DMA when the mask isn't all 1s,

	 * so we can't guarantee allocations that must be

	 * within a tighter range than GFP_DMA..

	 */

	if (mask < 0x00ffffff)

		return 0;



	return 1;

}



EXPORT_SYMBOL(dma_supported);



int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)

{

	return 1;

}



EXPORT_SYMBOL(dma_is_consistent);



void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

	       enum dma_data_direction direction)

{

	BUG_ON(direction == DMA_NONE);

}



EXPORT_SYMBOL(dma_cache_sync);



dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,

	struct page *page, unsigned long offset, int direction)

{

	dma64_addr_t addr = page_to_phys(page) + offset;



	return (dma64_addr_t) pdev_to_baddr(pdev, addr);

}



EXPORT_SYMBOL(pci_dac_page_to_dma);



struct page *pci_dac_dma_to_page(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus);



	return pfn_to_page((dma_addr - bc->baddr) >> PAGE_SHIFT);

}



EXPORT_SYMBOL(pci_dac_dma_to_page);



unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,

	dma64_addr_t dma_addr)

{

	return dma_addr & ~PAGE_MASK;

}



EXPORT_SYMBOL(pci_dac_dma_to_offset);



void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);



void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,

	dma64_addr_t dma_addr, size_t len, int direction)

{

	BUG_ON(direction == PCI_DMA_NONE);

}



EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);

CRA Git | Maintained and supported by SUSTech CRA and CCSE