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MIPS: Convert DMA to use dma-mapping-common.h 

Use asm-generic/dma-mapping-common.h to handle all DMA mapping operations
and establish a default get_dma_ops() that forwards all operations to the
existing code.

Augment dev_archdata to carry a pointer to the struct dma_map_ops, allowing
DMA operations to be overridden on a per device basis.  Currently this is
never filled in, so the default dma_map_ops are used.  A follow-on patch
sets this for Octeon PCI devices.

Also initialize the dma_debug system as it is now used if it is configured.

Includes fixes by Kevin Cernekee <cernekee@gmail.com>.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/1637/
Patchwork: http://patchwork.linux-mips.org/patch/1678/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2010-10-01 13:27:32 -07:00 committed by Ralf Baechle
parent 43e4f7ae4b
commit 48e1fd5a81
8 changed files with 138 additions and 155 deletions
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2
arch/mips/Kconfig
View File

@ -14,6 +14,8 @@ config MIPS
select HAVE_KRETPROBES
select RTC_LIB if !MACH_LOONGSON
select GENERIC_ATOMIC64 if !64BIT
select HAVE_DMA_ATTRS
select HAVE_DMA_API_DEBUG
menu "Machine selection"

15
arch/mips/include/asm/device.h
View File

@ -3,4 +3,17 @@
*
* This file is released under the GPLv2
*/
#include <asm-generic/device.h>
#ifndef _ASM_MIPS_DEVICE_H
#define _ASM_MIPS_DEVICE_H
struct dma_map_ops;
struct dev_archdata {
/* DMA operations on that device */
struct dma_map_ops *dma_ops;
};
struct pdev_archdata {
};
#endif /* _ASM_MIPS_DEVICE_H*/

100
arch/mips/include/asm/dma-mapping.h
View File

@ -5,51 +5,41 @@
#include <asm/cache.h>
#include <asm-generic/dma-coherent.h>
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
#include <dma-coherence.h>
void dma_free_noncoherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
extern struct dma_map_ops *mips_dma_map_ops;
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
extern dma_addr_t dma_map_single(struct device *dev, void *ptr, 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 int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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);
static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction direction)
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
dma_unmap_single(dev, dma_address, size, direction);
if (dev && dev->archdata.dma_ops)
return dev->archdata.dma_ops;
else
return mips_dma_map_ops;
}
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nhwentries, 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_supported(struct device *dev, u64 mask);
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return 0;
return addr + size <= *dev->dma_mask;
}
static inline void dma_mark_clean(void *addr, size_t size) {}
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
return ops->dma_supported(dev, mask);
}
static inline int dma_mapping_error(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
return ops->mapping_error(dev, mask);
}
static inline int
dma_set_mask(struct device *dev, u64 mask)
@ -65,4 +55,34 @@ dma_set_mask(struct device *dev, u64 mask)
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
void *ret;
struct dma_map_ops *ops = get_dma_ops(dev);
ret = ops->alloc_coherent(dev, size, dma_handle, gfp);
debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
return ret;
}
static inline void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
struct dma_map_ops *ops = get_dma_ops(dev);
ops->free_coherent(dev, size, vaddr, dma_handle);
debug_dma_free_coherent(dev, size, vaddr, dma_handle);
}
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
void dma_free_noncoherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
#endif /* _ASM_DMA_MAPPING_H */

2
arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
View File

@ -27,7 +27,7 @@ static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
return octeon_map_dma_mem(dev, page_address(page), PAGE_SIZE);
BUG();
}
static inline unsigned long plat_dma_addr_to_phys(struct device *dev,

3
arch/mips/include/asm/mach-ip27/dma-coherence.h
View File

@ -26,7 +26,8 @@ static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
return pa;
}
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
dma_addr_t pa = dev_to_baddr(dev, page_to_phys(page));

3
arch/mips/include/asm/mach-ip32/dma-coherence.h
View File

@ -37,7 +37,8 @@ static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
return pa;
}
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
dma_addr_t pa;

3
arch/mips/include/asm/mach-jazz/dma-coherence.h
View File

@ -17,7 +17,8 @@ static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t
return vdma_alloc(virt_to_phys(addr), size);
}
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
return vdma_alloc(page_to_phys(page), PAGE_SIZE);
}

163
arch/mips/mm/dma-default.c
View File

@ -95,10 +95,9 @@ void *dma_alloc_noncoherent(struct device *dev, size_t size,
return ret;
}
EXPORT_SYMBOL(dma_alloc_noncoherent);
void *dma_alloc_coherent(struct device *dev, size_t size,
static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
@ -123,7 +122,6 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
return ret;
}
EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
@ -131,10 +129,9 @@ void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
free_pages((unsigned long) vaddr, get_order(size));
}
EXPORT_SYMBOL(dma_free_noncoherent);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
unsigned long addr = (unsigned long) vaddr;
@ -151,8 +148,6 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
free_pages(addr, get_order(size));
}
EXPORT_SYMBOL(dma_free_coherent);
static inline void __dma_sync(unsigned long addr, size_t size,
enum dma_data_direction direction)
{
@ -174,21 +169,8 @@ static inline void __dma_sync(unsigned long addr, size_t size,
}
}
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
unsigned long addr = (unsigned long) ptr;
if (!plat_device_is_coherent(dev))
__dma_sync(addr, size, direction);
return plat_map_dma_mem(dev, ptr, size);
}
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)
static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
{
if (cpu_is_noncoherent_r10000(dev))
__dma_sync(dma_addr_to_virt(dev, dma_addr), size,
@ -197,15 +179,11 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
plat_unmap_dma_mem(dev, dma_addr, size, direction);
}
EXPORT_SYMBOL(dma_unmap_single);
int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
static int mips_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
{
int i;
BUG_ON(direction == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
unsigned long addr;
@ -219,33 +197,27 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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)
static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
BUG_ON(direction == DMA_NONE);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
addr = (unsigned long) page_address(page) + offset;
__dma_sync(addr, size, direction);
}
return plat_map_dma_mem_page(dev, page) + offset;
if (!plat_device_is_coherent(dev))
__dma_sync(addr, size, direction);
return plat_map_dma_mem(dev, (void *)addr, size);
}
EXPORT_SYMBOL(dma_map_page);
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
static void mips_dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nhwentries, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
unsigned long addr;
int i;
BUG_ON(direction == DMA_NONE);
for (i = 0; i < nhwentries; i++, sg++) {
if (!plat_device_is_coherent(dev) &&
direction != DMA_TO_DEVICE) {
@ -257,13 +229,9 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
}
}
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)
static void mips_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);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
@ -272,13 +240,9 @@ void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
}
}
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)
static void mips_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);
plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
@ -288,46 +252,11 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
}
}
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);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
addr = dma_addr_to_virt(dev, dma_handle);
__dma_sync(addr + 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)
{
BUG_ON(direction == DMA_NONE);
plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
addr = dma_addr_to_virt(dev, dma_handle);
__dma_sync(addr + 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)
static void mips_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sg, int nelems, enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
/* Make sure that gcc doesn't leave the empty loop body. */
for (i = 0; i < nelems; i++, sg++) {
if (cpu_is_noncoherent_r10000(dev))
@ -336,15 +265,11 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
}
}
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)
static void mips_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nelems, enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
/* Make sure that gcc doesn't leave the empty loop body. */
for (i = 0; i < nelems; i++, sg++) {
if (!plat_device_is_coherent(dev))
@ -353,23 +278,17 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nele
}
}
EXPORT_SYMBOL(dma_sync_sg_for_device);
int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return plat_dma_mapping_error(dev, dma_addr);
}
EXPORT_SYMBOL(dma_mapping_error);
int dma_supported(struct device *dev, u64 mask)
int mips_dma_supported(struct device *dev, u64 mask)
{
return plat_dma_supported(dev, mask);
}
EXPORT_SYMBOL(dma_supported);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
void mips_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
@ -379,4 +298,30 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
__dma_sync((unsigned long)vaddr, size, direction);
}
EXPORT_SYMBOL(dma_cache_sync);
static struct dma_map_ops mips_default_dma_map_ops = {
.alloc_coherent = mips_dma_alloc_coherent,
.free_coherent = mips_dma_free_coherent,
.map_page = mips_dma_map_page,
.unmap_page = mips_dma_unmap_page,
.map_sg = mips_dma_map_sg,
.unmap_sg = mips_dma_unmap_sg,
.sync_single_for_cpu = mips_dma_sync_single_for_cpu,
.sync_single_for_device = mips_dma_sync_single_for_device,
.sync_sg_for_cpu = mips_dma_sync_sg_for_cpu,
.sync_sg_for_device = mips_dma_sync_sg_for_device,
.mapping_error = mips_dma_mapping_error,
.dma_supported = mips_dma_supported
};
struct dma_map_ops *mips_dma_map_ops = &mips_default_dma_map_ops;
EXPORT_SYMBOL(mips_dma_map_ops);
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
static int __init mips_dma_init(void)
{
dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
return 0;
}
fs_initcall(mips_dma_init);