[ARM] dma: use new dmabounce_sync_for_xxx() for dma_sync_single_xxx()
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
parent
2638b4dbe7
commit
8c8a0ec57e
|
@ -444,30 +444,6 @@ dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
|
|||
unmap_single(dev, dma_addr, size, dir);
|
||||
}
|
||||
|
||||
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_addr,
|
||||
unsigned long offset, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
|
||||
__func__, dma_addr, offset, size, dir);
|
||||
|
||||
if (sync_single(dev, dma_addr, offset + size, dir))
|
||||
dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
|
||||
}
|
||||
EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
|
||||
|
||||
void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr,
|
||||
unsigned long offset, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
|
||||
__func__, dma_addr, offset, size, dir);
|
||||
|
||||
if (sync_single(dev, dma_addr, offset + size, dir))
|
||||
dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
|
||||
}
|
||||
EXPORT_SYMBOL(dma_sync_single_range_for_device);
|
||||
|
||||
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
|
||||
unsigned long off, size_t sz, enum dma_data_direction dir)
|
||||
{
|
||||
|
|
|
@ -184,6 +184,76 @@ int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
|
|||
void *cpu_addr, dma_addr_t handle, size_t size);
|
||||
|
||||
|
||||
#ifdef CONFIG_DMABOUNCE
|
||||
/*
|
||||
* For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic"
|
||||
* and utilize bounce buffers as needed to work around limited DMA windows.
|
||||
*
|
||||
* On the SA-1111, a bug limits DMA to only certain regions of RAM.
|
||||
* On the IXP425, the PCI inbound window is 64MB (256MB total RAM)
|
||||
* On some ADI engineering systems, PCI inbound window is 32MB (12MB total RAM)
|
||||
*
|
||||
* The following are helper functions used by the dmabounce subystem
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* dmabounce_register_dev
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
* @small_buf_size: size of buffers to use with small buffer pool
|
||||
* @large_buf_size: size of buffers to use with large buffer pool (can be 0)
|
||||
*
|
||||
* This function should be called by low-level platform code to register
|
||||
* a device as requireing DMA buffer bouncing. The function will allocate
|
||||
* appropriate DMA pools for the device.
|
||||
*
|
||||
*/
|
||||
extern int dmabounce_register_dev(struct device *, unsigned long, unsigned long);
|
||||
|
||||
/**
|
||||
* dmabounce_unregister_dev
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
*
|
||||
* This function should be called by low-level platform code when device
|
||||
* that was previously registered with dmabounce_register_dev is removed
|
||||
* from the system.
|
||||
*
|
||||
*/
|
||||
extern void dmabounce_unregister_dev(struct device *);
|
||||
|
||||
/**
|
||||
* dma_needs_bounce
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
* @dma_handle: dma_handle of unbounced buffer
|
||||
* @size: size of region being mapped
|
||||
*
|
||||
* Platforms that utilize the dmabounce mechanism must implement
|
||||
* this function.
|
||||
*
|
||||
* The dmabounce routines call this function whenever a dma-mapping
|
||||
* is requested to determine whether a given buffer needs to be bounced
|
||||
* or not. The function must return 0 if the buffer is OK for
|
||||
* DMA access and 1 if the buffer needs to be bounced.
|
||||
*
|
||||
*/
|
||||
extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
|
||||
|
||||
/*
|
||||
* Private functions
|
||||
*/
|
||||
int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long,
|
||||
size_t, enum dma_data_direction);
|
||||
int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
|
||||
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)
|
||||
#endif /* CONFIG_DMABOUNCE */
|
||||
|
||||
|
||||
/**
|
||||
* dma_map_single - map a single buffer for streaming DMA
|
||||
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
|
||||
|
@ -308,12 +378,14 @@ 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.
|
||||
*/
|
||||
#ifndef CONFIG_DMABOUNCE
|
||||
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;
|
||||
|
||||
if (!arch_is_coherent())
|
||||
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
|
||||
}
|
||||
|
@ -323,13 +395,12 @@ 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;
|
||||
|
||||
if (!arch_is_coherent())
|
||||
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
|
||||
}
|
||||
#else
|
||||
extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
|
||||
extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
|
||||
#endif
|
||||
|
||||
static inline void
|
||||
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
|
||||
|
@ -354,74 +425,5 @@ extern void dma_sync_sg_for_cpu(struct device*, struct scatterlist*, int, enum d
|
|||
extern void dma_sync_sg_for_device(struct device*, struct scatterlist*, int, enum dma_data_direction);
|
||||
|
||||
|
||||
#ifdef CONFIG_DMABOUNCE
|
||||
/*
|
||||
* For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic"
|
||||
* and utilize bounce buffers as needed to work around limited DMA windows.
|
||||
*
|
||||
* On the SA-1111, a bug limits DMA to only certain regions of RAM.
|
||||
* On the IXP425, the PCI inbound window is 64MB (256MB total RAM)
|
||||
* On some ADI engineering systems, PCI inbound window is 32MB (12MB total RAM)
|
||||
*
|
||||
* The following are helper functions used by the dmabounce subystem
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* dmabounce_register_dev
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
* @small_buf_size: size of buffers to use with small buffer pool
|
||||
* @large_buf_size: size of buffers to use with large buffer pool (can be 0)
|
||||
*
|
||||
* This function should be called by low-level platform code to register
|
||||
* a device as requireing DMA buffer bouncing. The function will allocate
|
||||
* appropriate DMA pools for the device.
|
||||
*
|
||||
*/
|
||||
extern int dmabounce_register_dev(struct device *, unsigned long, unsigned long);
|
||||
|
||||
/**
|
||||
* dmabounce_unregister_dev
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
*
|
||||
* This function should be called by low-level platform code when device
|
||||
* that was previously registered with dmabounce_register_dev is removed
|
||||
* from the system.
|
||||
*
|
||||
*/
|
||||
extern void dmabounce_unregister_dev(struct device *);
|
||||
|
||||
/**
|
||||
* dma_needs_bounce
|
||||
*
|
||||
* @dev: valid struct device pointer
|
||||
* @dma_handle: dma_handle of unbounced buffer
|
||||
* @size: size of region being mapped
|
||||
*
|
||||
* Platforms that utilize the dmabounce mechanism must implement
|
||||
* this function.
|
||||
*
|
||||
* The dmabounce routines call this function whenever a dma-mapping
|
||||
* is requested to determine whether a given buffer needs to be bounced
|
||||
* or not. The function must return 0 if the buffer is OK for
|
||||
* DMA access and 1 if the buffer needs to be bounced.
|
||||
*
|
||||
*/
|
||||
extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
|
||||
|
||||
/*
|
||||
* Private functions
|
||||
*/
|
||||
int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long,
|
||||
size_t, enum dma_data_direction);
|
||||
int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
|
||||
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)
|
||||
#endif /* CONFIG_DMABOUNCE */
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
#endif
|
||||
|
|
Loading…
Reference in a new issue