* 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)
{
}
* 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
* 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
* 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);
/**
* 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
* 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
/*
* 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)
* 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)
{
+ BUG_ON(!valid_dma_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
* 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)
{
+ BUG_ON(!valid_dma_direction(dir));
+
if (!arch_is_coherent())
dma_cache_maint(page_address(page) + offset, size, dir);
* 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 */
}
* 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);
}
* 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;
+ BUG_ON(!valid_dma_direction(dir));
- if (!arch_is_coherent())
- dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
+ dmabounce_sync_for_cpu(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)
{
+ BUG_ON(!valid_dma_direction(dir));
+
if (!dmabounce_sync_for_device(dev, handle, offset, size, dir))
return;
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__ */