Commit 754c7809 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-v3.18' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 

Pull dma-mapping update from Marek Szyprowski:
 "Provide the dma write coherent api (available previously on ARM
  architecture) for all other architectures, which use dma_ops-based dma
  mapping implementation.

  This lets one to use the same code in the device drivers regardless of
  the selected architecture"

* 'for-v3.18' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  dma-mapping: Provide write-combine allocations
  s390: Implement dma_{alloc,free}_attrs()
parents 40c43269 b4bbb107

arch/arm/include/asm/dma-mapping.h

+0 −16
Original line number Diff line number Diff line
@@ -265,22 +265,6 @@ extern int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, 
			void *cpu_addr, dma_addr_t dma_addr, size_t size,

			struct dma_attrs *attrs);



static inline void *dma_alloc_writecombine(struct device *dev, size_t size,

				       dma_addr_t *dma_handle, gfp_t flag)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_alloc_attrs(dev, size, dma_handle, flag, &attrs);

}



static inline void dma_free_writecombine(struct device *dev, size_t size,

				     void *cpu_addr, dma_addr_t dma_handle)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);

}



/*

 * This can be called during early boot to increase the size of the atomic

 * coherent DMA pool above the default value of 256KiB. It must be called

arch/s390/Kconfig

+1 −4
Original line number Diff line number Diff line
@@ -496,8 +496,8 @@ config QDIO 


menuconfig PCI

	bool "PCI support"

	default n

	depends on 64BIT

	select HAVE_DMA_ATTRS

	select PCI_MSI

	help

	  Enable PCI support.
@@ -544,9 +544,6 @@ config HAS_DMA 
config NEED_SG_DMA_LENGTH

	def_bool PCI



config HAVE_DMA_ATTRS

	def_bool PCI



config NEED_DMA_MAP_STATE

	def_bool PCI

arch/s390/include/asm/dma-mapping.h

+21 −10
Original line number Diff line number Diff line
@@ -56,24 +56,35 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 
	return dma_addr == DMA_ERROR_CODE;

}



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

				       dma_addr_t *dma_handle, gfp_t flag)

#define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL)



static inline void *dma_alloc_attrs(struct device *dev, size_t size,

				    dma_addr_t *dma_handle, gfp_t flags,

				    struct dma_attrs *attrs)

{

	struct dma_map_ops *ops = get_dma_ops(dev);

	void *ret;

	void *cpu_addr;



	BUG_ON(!ops);



	ret = ops->alloc(dev, size, dma_handle, flag, NULL);

	debug_dma_alloc_coherent(dev, size, *dma_handle, ret);

	return ret;

	cpu_addr = ops->alloc(dev, size, dma_handle, flags, attrs);

	debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);



	return cpu_addr;

}



static inline void dma_free_coherent(struct device *dev, size_t size,

				     void *cpu_addr, dma_addr_t dma_handle)

#define dma_free_coherent(d, s, c, h) dma_free_attrs(d, s, c, h, NULL)



static inline void dma_free_attrs(struct device *dev, size_t size,

				  void *cpu_addr, dma_addr_t dma_handle,

				  struct dma_attrs *attrs)

{

	struct dma_map_ops *dma_ops = get_dma_ops(dev);

	struct dma_map_ops *ops = get_dma_ops(dev);



	BUG_ON(!ops);



	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);

	dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);

	ops->free(dev, size, cpu_addr, dma_handle, attrs);

}



#endif /* _ASM_S390_DMA_MAPPING_H */

include/asm-generic/dma-mapping-common.h

+0 −8
Original line number Diff line number Diff line
@@ -214,14 +214,6 @@ dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, 


#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)



static inline int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,

		      void *cpu_addr, dma_addr_t dma_addr, size_t size)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs);

}



int

dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,

		       void *cpu_addr, dma_addr_t dma_addr, size_t size);

include/linux/dma-mapping.h

+26 −0
Original line number Diff line number Diff line
@@ -263,6 +263,32 @@ struct dma_attrs; 
#define dma_unmap_sg_attrs(dev, sgl, nents, dir, attrs) \

	dma_unmap_sg(dev, sgl, nents, dir)



#else

static inline void *dma_alloc_writecombine(struct device *dev, size_t size,

					   dma_addr_t *dma_addr, gfp_t gfp)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_alloc_attrs(dev, size, dma_addr, gfp, &attrs);

}



static inline void dma_free_writecombine(struct device *dev, size_t size,

					 void *cpu_addr, dma_addr_t dma_addr)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_free_attrs(dev, size, cpu_addr, dma_addr, &attrs);

}



static inline int dma_mmap_writecombine(struct device *dev,

					struct vm_area_struct *vma,

					void *cpu_addr, dma_addr_t dma_addr,

					size_t size)

{

	DEFINE_DMA_ATTRS(attrs);

	dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);

	return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs);

}

#endif /* CONFIG_HAVE_DMA_ATTRS */



#ifdef CONFIG_NEED_DMA_MAP_STATE

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