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yaml
---
r: 112306
b: refs/heads/master
c: 3216a97
h: refs/heads/master
v: v3
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Russell King authored and Russell King committed Sep 29, 2008
1 parent 6694c18 commit ee01f1f
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Showing 3 changed files with 65 additions and 89 deletions.
2 changes: 1 addition & 1 deletion [refs]
View file
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 125ab12acf64ff86b55d20e14db20becd917b7c4
refs/heads/master: 3216a97bb0d5166ec5795aa3db1c3a02415ac060
48 changes: 16 additions & 32 deletions trunk/arch/arm/common/dmabounce.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -154,9 +154,7 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr,
#endif

write_lock_irqsave(&device_info->lock, flags);

list_add(&buf->node, &device_info->safe_buffers);

write_unlock_irqrestore(&device_info->lock, flags);

return buf;
Expand Down Expand Up @@ -220,8 +218,7 @@ static struct safe_buffer *find_safe_buffer_dev(struct device *dev,
return find_safe_buffer(dev->archdata.dmabounce, dma_addr);
}

static inline dma_addr_t
map_single(struct device *dev, void *ptr, size_t size,
static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
Expand Down Expand Up @@ -285,9 +282,8 @@ map_single(struct device *dev, void *ptr, size_t size,
return dma_addr;
}

static inline void
unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
static inline void unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir)
{
struct safe_buffer *buf = find_safe_buffer_dev(dev, dma_addr, "unmap");

Expand Down Expand Up @@ -332,25 +328,20 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
dma_addr_t dma_addr;

dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, ptr, size, dir);

BUG_ON(dir == DMA_NONE);

dma_addr = map_single(dev, ptr, size, dir);

return dma_addr;
return map_single(dev, ptr, size, dir);
}
EXPORT_SYMBOL(dma_map_single);

dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir)
unsigned long offset, size_t size, enum dma_data_direction dir)
{
dev_dbg(dev, "%s(page=%p,off=%#lx,size=%zx,dir=%x)\n",
__func__, page, offset, size, dir);
Expand All @@ -368,9 +359,8 @@ EXPORT_SYMBOL(dma_map_page);
* should be)
*/

void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, (void *) dma_addr, size, dir);
Expand All @@ -379,6 +369,7 @@ dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,

unmap_single(dev, dma_addr, size, dir);
}
EXPORT_SYMBOL(dma_unmap_single);

int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
unsigned long off, size_t sz, enum dma_data_direction dir)
Expand Down Expand Up @@ -434,9 +425,8 @@ int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
}
EXPORT_SYMBOL(dmabounce_sync_for_device);

static int
dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char *name,
unsigned long size)
static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,
const char *name, unsigned long size)
{
pool->size = size;
DO_STATS(pool->allocs = 0);
Expand All @@ -447,9 +437,8 @@ dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char
return pool->pool ? 0 : -ENOMEM;
}

int
dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
unsigned long large_buffer_size)
int dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
unsigned long large_buffer_size)
{
struct dmabounce_device_info *device_info;
int ret;
Expand Down Expand Up @@ -505,9 +494,9 @@ dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
kfree(device_info);
return ret;
}
EXPORT_SYMBOL(dmabounce_register_dev);

void
dmabounce_unregister_dev(struct device *dev)
void dmabounce_unregister_dev(struct device *dev)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;

Expand Down Expand Up @@ -540,11 +529,6 @@ dmabounce_unregister_dev(struct device *dev)

dev_info(dev, "dmabounce: device unregistered\n");
}


EXPORT_SYMBOL(dma_map_single);
EXPORT_SYMBOL(dma_unmap_single);
EXPORT_SYMBOL(dmabounce_register_dev);
EXPORT_SYMBOL(dmabounce_unregister_dev);

MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>, Deepak Saxena <dsaxena@plexity.net>");
Expand Down
104 changes: 48 additions & 56 deletions trunk/arch/arm/include/asm/dma-mapping.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -104,15 +104,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
* Dummy noncoherent implementation. We don't provide a dma_cache_sync
* function so drivers using this API are highlighted with build warnings.
*/
static inline void *
dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp)
{
return NULL;
}

static inline void
dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle)
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t handle)
{
}

Expand All @@ -127,8 +126,7 @@ dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
* return the CPU-viewed address, and sets @handle to be the
* device-viewed address.
*/
extern void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp);
extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);

/**
* dma_free_coherent - free memory allocated by dma_alloc_coherent
Expand All @@ -143,9 +141,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gf
* References to memory and mappings associated with cpu_addr/handle
* during and after this call executing are illegal.
*/
extern void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle);
extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);

/**
* dma_mmap_coherent - map a coherent DMA allocation into user space
Expand All @@ -159,8 +155,8 @@ dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
* into user space. The coherent DMA buffer must not be freed by the
* driver until the user space mapping has been released.
*/
int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t handle, size_t size);
int dma_mmap_coherent(struct device *, struct vm_area_struct *,
void *, dma_addr_t, size_t);


/**
Expand All @@ -174,14 +170,14 @@ int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
* return the CPU-viewed address, and sets @handle to be the
* device-viewed address.
*/
extern void *
dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp);
extern void *dma_alloc_writecombine(struct device *, size_t, dma_addr_t *,
gfp_t);

#define dma_free_writecombine(dev,size,cpu_addr,handle) \
dma_free_coherent(dev,size,cpu_addr,handle)

int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t handle, size_t size);
int dma_mmap_writecombine(struct device *, struct vm_area_struct *,
void *, dma_addr_t, size_t);


#ifdef CONFIG_DMABOUNCE
Expand Down Expand Up @@ -209,7 +205,8 @@ int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
* appropriate DMA pools for the device.
*
*/
extern int dmabounce_register_dev(struct device *, unsigned long, unsigned long);
extern int dmabounce_register_dev(struct device *, unsigned long,
unsigned long);

/**
* dmabounce_unregister_dev
Expand Down Expand Up @@ -244,19 +241,20 @@ extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
/*
* The DMA API, implemented by dmabounce.c. See below for descriptions.
*/
extern dma_addr_t dma_map_single(struct device *,void *, size_t, enum dma_data_direction);
extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir);
extern void dma_unmap_single(struct device *, dma_addr_t, size_t, enum dma_data_direction);
extern dma_addr_t dma_map_single(struct device *, void *, size_t,
enum dma_data_direction);
extern dma_addr_t dma_map_page(struct device *, struct page *,
unsigned long, size_t, enum dma_data_direction);
extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
enum dma_data_direction);

/*
* Private functions
*/
int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long,
size_t, enum dma_data_direction);
size_t, enum dma_data_direction);
int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
size_t, enum dma_data_direction);
size_t, enum dma_data_direction);
#else
#define dmabounce_sync_for_cpu(dev,dma,off,sz,dir) (1)
#define dmabounce_sync_for_device(dev,dma,off,sz,dir) (1)
Expand All @@ -276,17 +274,15 @@ int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
* can regain ownership by calling dma_unmap_single() or
* dma_sync_single_for_cpu().
*/
static inline dma_addr_t
dma_map_single(struct device *dev, void *cpu_addr, size_t size,
enum dma_data_direction dir)
static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size, enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(cpu_addr, size, dir);

return virt_to_dma(dev, cpu_addr);
}


/**
* dma_map_page - map a portion of a page for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
Expand All @@ -302,10 +298,8 @@ dma_map_single(struct device *dev, void *cpu_addr, size_t size,
* can regain ownership by calling dma_unmap_page() or
* dma_sync_single_for_cpu().
*/
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir)
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(page_address(page) + offset, size, dir);
Expand All @@ -327,9 +321,8 @@ dma_map_page(struct device *dev, struct page *page,
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static inline void
dma_unmap_single(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
/* nothing to do */
}
Expand All @@ -349,9 +342,8 @@ dma_unmap_single(struct device *dev, dma_addr_t handle, size_t size,
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static inline void
dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
dma_unmap_single(dev, handle, size, dir);
}
Expand All @@ -374,10 +366,9 @@ dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size,
* must first the perform a dma_sync_for_device, and then the
* device again owns the buffer.
*/
static inline void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
static inline void dma_sync_single_range_for_cpu(struct device *dev,
dma_addr_t handle, unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!dmabounce_sync_for_cpu(dev, handle, offset, size, dir))
return;
Expand All @@ -386,10 +377,9 @@ dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}

static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
static inline void dma_sync_single_range_for_device(struct device *dev,
dma_addr_t handle, unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!dmabounce_sync_for_device(dev, handle, offset, size, dir))
return;
Expand All @@ -398,27 +388,29 @@ dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}

static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
static inline void dma_sync_single_for_cpu(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
}

static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
static inline void dma_sync_single_for_device(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
dma_sync_single_range_for_device(dev, handle, 0, size, dir);
}

/*
* The scatter list versions of the above methods.
*/
extern int dma_map_sg(struct device *, struct scatterlist *, int, enum dma_data_direction);
extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_data_direction);
extern void dma_sync_sg_for_cpu(struct device*, struct scatterlist*, int, enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device*, struct scatterlist*, int, enum dma_data_direction);
extern int dma_map_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_unmap_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_sync_sg_for_cpu(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
enum dma_data_direction);


#endif /* __KERNEL__ */
Expand Down

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