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Commit e2b745f4 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'dma-mapping-4.21-1' of git://git.infradead.org/users/hch/dma-mapping 

Pull dma-mapping fixes from Christoph Hellwig:
 "Fix various regressions introduced in this cycles:

   - fix dma-debug tracking for the map_page / map_single
     consolidatation

   - properly stub out DMA mapping symbols for !HAS_DMA builds to avoid
     link failures

   - fix AMD Gart direct mappings

   - setup the dma address for no kernel mappings using the remap
     allocator"

* tag 'dma-mapping-4.21-1' of git://git.infradead.org/users/hch/dma-mapping:
  dma-direct: fix DMA_ATTR_NO_KERNEL_MAPPING for remapped allocations
  x86/amd_gart: fix unmapping of non-GART mappings
  dma-mapping: remove a few unused exports
  dma-mapping: properly stub out the DMA API for !CONFIG_HAS_DMA
  dma-mapping: remove dmam_{declare,release}_coherent_memory
  dma-mapping: implement dmam_alloc_coherent using dmam_alloc_attrs
  dma-mapping: implement dma_map_single_attrs using dma_map_page_attrs
parents 12133258 8270f3a1

Documentation/driver-model/devres.txt

+0 −1
Original line number Diff line number Diff line
@@ -250,7 +250,6 @@ DMA 
  dmaenginem_async_device_register()

  dmam_alloc_coherent()

  dmam_alloc_attrs()

  dmam_declare_coherent_memory()

  dmam_free_coherent()

  dmam_pool_create()

  dmam_pool_destroy()

arch/x86/kernel/amd_gart_64.c

+9 −1
Original line number Diff line number Diff line
@@ -256,7 +256,15 @@ static void gart_unmap_page(struct device *dev, dma_addr_t dma_addr, 
	int npages;

	int i;



	if (dma_addr == DMA_MAPPING_ERROR ||

	if (WARN_ON_ONCE(dma_addr == DMA_MAPPING_ERROR))

		return;



	/*

	 * This driver will not always use a GART mapping, but might have

	 * created a direct mapping instead.  If that is the case there is

	 * nothing to unmap here.

	 */

	if (dma_addr < iommu_bus_base ||

	    dma_addr >= iommu_bus_base + iommu_size)

		return;

include/linux/dma-debug.h

+4 −7
Original line number Diff line number Diff line
@@ -35,13 +35,12 @@ extern void debug_dma_map_single(struct device *dev, const void *addr, 


extern void debug_dma_map_page(struct device *dev, struct page *page,

			       size_t offset, size_t size,

			       int direction, dma_addr_t dma_addr,

			       bool map_single);

			       int direction, dma_addr_t dma_addr);



extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);



extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,

				 size_t size, int direction, bool map_single);

				 size_t size, int direction);



extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,

			     int nents, int mapped_ents, int direction);
@@ -95,8 +94,7 @@ static inline void debug_dma_map_single(struct device *dev, const void *addr, 


static inline void debug_dma_map_page(struct device *dev, struct page *page,

				      size_t offset, size_t size,

				      int direction, dma_addr_t dma_addr,

				      bool map_single)

				      int direction, dma_addr_t dma_addr)

{

}
@@ -106,8 +104,7 @@ static inline void debug_dma_mapping_error(struct device *dev, 
}



static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,

					size_t size, int direction,

					bool map_single)

					size_t size, int direction)

{

}

include/linux/dma-mapping.h

+191 −149
Original line number Diff line number Diff line
@@ -194,33 +194,6 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma, 
}

#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */



#ifdef CONFIG_HAS_DMA

#include <asm/dma-mapping.h>

static inline const struct dma_map_ops *get_dma_ops(struct device *dev)

{

	if (dev && dev->dma_ops)

		return dev->dma_ops;

	return get_arch_dma_ops(dev ? dev->bus : NULL);

}



static inline void set_dma_ops(struct device *dev,

			       const struct dma_map_ops *dma_ops)

{

	dev->dma_ops = dma_ops;

}

#else

/*

 * Define the dma api to allow compilation of dma dependent code.

 * Code that depends on the dma-mapping API needs to set 'depends on HAS_DMA'

 * in its Kconfig, unless it already depends on <something> || COMPILE_TEST,

 * where <something> guarantuees the availability of the dma-mapping API.

 */

static inline const struct dma_map_ops *get_dma_ops(struct device *dev)

{

	return NULL;

}

#endif



static inline bool dma_is_direct(const struct dma_map_ops *ops)

{

	return likely(!ops);
@@ -284,32 +257,41 @@ static inline void dma_direct_sync_sg_for_cpu(struct device *dev, 
}

#endif



static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,

					      size_t size,

					      enum dma_data_direction dir,

					      unsigned long attrs)

#ifdef CONFIG_HAS_DMA

#include <asm/dma-mapping.h>



static inline const struct dma_map_ops *get_dma_ops(struct device *dev)

{

	if (dev && dev->dma_ops)

		return dev->dma_ops;

	return get_arch_dma_ops(dev ? dev->bus : NULL);

}



static inline void set_dma_ops(struct device *dev,

			       const struct dma_map_ops *dma_ops)

{

	dev->dma_ops = dma_ops;

}



static inline dma_addr_t dma_map_page_attrs(struct device *dev,

		struct page *page, size_t offset, size_t size,

		enum dma_data_direction dir, unsigned long attrs)

{

	const struct dma_map_ops *ops = get_dma_ops(dev);

	dma_addr_t addr;



	BUG_ON(!valid_dma_direction(dir));

	debug_dma_map_single(dev, ptr, size);

	if (dma_is_direct(ops))

		addr = dma_direct_map_page(dev, virt_to_page(ptr),

				offset_in_page(ptr), size, dir, attrs);

		addr = dma_direct_map_page(dev, page, offset, size, dir, attrs);

	else

		addr = ops->map_page(dev, virt_to_page(ptr),

				offset_in_page(ptr), size, dir, attrs);

	debug_dma_map_page(dev, virt_to_page(ptr),

			   offset_in_page(ptr), size,

			   dir, addr, true);

		addr = ops->map_page(dev, page, offset, size, dir, attrs);

	debug_dma_map_page(dev, page, offset, size, dir, addr);



	return addr;

}



static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,

					  size_t size,

					  enum dma_data_direction dir,

					  unsigned long attrs)

static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

	const struct dma_map_ops *ops = get_dma_ops(dev);
@@ -318,13 +300,7 @@ static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr, 
		dma_direct_unmap_page(dev, addr, size, dir, attrs);

	else if (ops->unmap_page)

		ops->unmap_page(dev, addr, size, dir, attrs);

	debug_dma_unmap_page(dev, addr, size, dir, true);

}



static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

	return dma_unmap_single_attrs(dev, addr, size, dir, attrs);

	debug_dma_unmap_page(dev, addr, size, dir);

}



/*
@@ -363,25 +339,6 @@ static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg 
		ops->unmap_sg(dev, sg, nents, dir, attrs);

}



static inline dma_addr_t dma_map_page_attrs(struct device *dev,

					    struct page *page,

					    size_t offset, size_t size,

					    enum dma_data_direction dir,

					    unsigned long attrs)

{

	const struct dma_map_ops *ops = get_dma_ops(dev);

	dma_addr_t addr;



	BUG_ON(!valid_dma_direction(dir));

	if (dma_is_direct(ops))

		addr = dma_direct_map_page(dev, page, offset, size, dir, attrs);

	else

		addr = ops->map_page(dev, page, offset, size, dir, attrs);

	debug_dma_map_page(dev, page, offset, size, dir, addr, false);



	return addr;

}



static inline dma_addr_t dma_map_resource(struct device *dev,

					  phys_addr_t phys_addr,

					  size_t size,
@@ -431,13 +388,6 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, 
	debug_dma_sync_single_for_cpu(dev, addr, size, dir);

}



static inline void dma_sync_single_range_for_cpu(struct device *dev,

		dma_addr_t addr, unsigned long offset, size_t size,

		enum dma_data_direction dir)

{

	return dma_sync_single_for_cpu(dev, addr + offset, size, dir);

}



static inline void dma_sync_single_for_device(struct device *dev,

					      dma_addr_t addr, size_t size,

					      enum dma_data_direction dir)
@@ -452,13 +402,6 @@ static inline void dma_sync_single_for_device(struct device *dev, 
	debug_dma_sync_single_for_device(dev, addr, size, dir);

}



static inline void dma_sync_single_range_for_device(struct device *dev,

		dma_addr_t addr, unsigned long offset, size_t size,

		enum dma_data_direction dir)

{

	return dma_sync_single_for_device(dev, addr + offset, size, dir);

}



static inline void

dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,

		    int nelems, enum dma_data_direction dir)
@@ -488,15 +431,174 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 


}



static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)

{

	debug_dma_mapping_error(dev, dma_addr);



	if (dma_addr == DMA_MAPPING_ERROR)

		return -ENOMEM;

	return 0;

}



void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,

		gfp_t flag, unsigned long attrs);

void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,

		dma_addr_t dma_handle, unsigned long attrs);

void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,

		gfp_t gfp, unsigned long attrs);

void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,

		dma_addr_t dma_handle);

void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

		enum dma_data_direction dir);

int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs);

int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs);

int dma_supported(struct device *dev, u64 mask);

int dma_set_mask(struct device *dev, u64 mask);

int dma_set_coherent_mask(struct device *dev, u64 mask);

u64 dma_get_required_mask(struct device *dev);

#else /* CONFIG_HAS_DMA */

static inline dma_addr_t dma_map_page_attrs(struct device *dev,

		struct page *page, size_t offset, size_t size,

		enum dma_data_direction dir, unsigned long attrs)

{

	return DMA_MAPPING_ERROR;

}

static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

}

static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,

		int nents, enum dma_data_direction dir, unsigned long attrs)

{

	return 0;

}

static inline void dma_unmap_sg_attrs(struct device *dev,

		struct scatterlist *sg, int nents, enum dma_data_direction dir,

		unsigned long attrs)

{

}

static inline dma_addr_t dma_map_resource(struct device *dev,

		phys_addr_t phys_addr, size_t size, enum dma_data_direction dir,

		unsigned long attrs)

{

	return DMA_MAPPING_ERROR;

}

static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

}

static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir)

{

}

static inline void dma_sync_single_for_device(struct device *dev,

		dma_addr_t addr, size_t size, enum dma_data_direction dir)

{

}

static inline void dma_sync_sg_for_cpu(struct device *dev,

		struct scatterlist *sg, int nelems, enum dma_data_direction dir)

{

}

static inline void dma_sync_sg_for_device(struct device *dev,

		struct scatterlist *sg, int nelems, enum dma_data_direction dir)

{

}

static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)

{

	return -ENOMEM;

}

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

		dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)

{

	return NULL;

}

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

		dma_addr_t dma_handle, unsigned long attrs)

{

}

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

		dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)

{

	return NULL;

}

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

		void *vaddr, dma_addr_t dma_handle)

{

}

static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

		enum dma_data_direction dir)

{

}

static inline int dma_get_sgtable_attrs(struct device *dev,

		struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr,

		size_t size, unsigned long attrs)

{

	return -ENXIO;

}

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

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs)

{

	return -ENXIO;

}

static inline int dma_supported(struct device *dev, u64 mask)

{

	return 0;

}

static inline int dma_set_mask(struct device *dev, u64 mask)

{

	return -EIO;

}

static inline int dma_set_coherent_mask(struct device *dev, u64 mask)

{

	return -EIO;

}

static inline u64 dma_get_required_mask(struct device *dev)

{

	return 0;

}

#endif /* CONFIG_HAS_DMA */



static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

	debug_dma_map_single(dev, ptr, size);

	return dma_map_page_attrs(dev, virt_to_page(ptr), offset_in_page(ptr),

			size, dir, attrs);

}



static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,

		size_t size, enum dma_data_direction dir, unsigned long attrs)

{

	return dma_unmap_page_attrs(dev, addr, size, dir, attrs);

}



static inline void dma_sync_single_range_for_cpu(struct device *dev,

		dma_addr_t addr, unsigned long offset, size_t size,

		enum dma_data_direction dir)

{

	return dma_sync_single_for_cpu(dev, addr + offset, size, dir);

}



static inline void dma_sync_single_range_for_device(struct device *dev,

		dma_addr_t addr, unsigned long offset, size_t size,

		enum dma_data_direction dir)

{

	return dma_sync_single_for_device(dev, addr + offset, size, dir);

}



#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)

#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)

#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)

#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)

#define dma_map_page(d, p, o, s, r) dma_map_page_attrs(d, p, o, s, r, 0)

#define dma_unmap_page(d, a, s, r) dma_unmap_page_attrs(d, a, s, r, 0)



void dma_cache_sync(struct device *dev, void *vaddr, size_t size,

		enum dma_data_direction dir);

#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)

#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)



extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,
@@ -516,25 +618,10 @@ bool dma_in_atomic_pool(void *start, size_t size); 
void *dma_alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags);

bool dma_free_from_pool(void *start, size_t size);



int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs);

#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)



int

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

		dma_addr_t dma_addr, size_t size, unsigned long attrs);



int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs);

#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)



void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,

		gfp_t flag, unsigned long attrs);

void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,

		dma_addr_t dma_handle, unsigned long attrs);



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

		dma_addr_t *dma_handle, gfp_t gfp)

{
@@ -549,18 +636,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size, 
	return dma_free_attrs(dev, size, cpu_addr, dma_handle, 0);

}



static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)

{

	debug_dma_mapping_error(dev, dma_addr);



	if (dma_addr == DMA_MAPPING_ERROR)

		return -ENOMEM;

	return 0;

}



int dma_supported(struct device *dev, u64 mask);

int dma_set_mask(struct device *dev, u64 mask);

int dma_set_coherent_mask(struct device *dev, u64 mask);



static inline u64 dma_get_mask(struct device *dev)

{
@@ -593,8 +668,6 @@ static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask) 
	return dma_set_mask_and_coherent(dev, mask);

}



extern u64 dma_get_required_mask(struct device *dev);



#ifndef arch_setup_dma_ops

static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,

				      u64 size, const struct iommu_ops *iommu,
@@ -691,43 +764,12 @@ dma_mark_declared_memory_occupied(struct device *dev, 
}

#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */



/*

 * Managed DMA API

 */

#ifdef CONFIG_HAS_DMA

extern void *dmam_alloc_coherent(struct device *dev, size_t size,

				 dma_addr_t *dma_handle, gfp_t gfp);

extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,

			       dma_addr_t dma_handle);

#else /* !CONFIG_HAS_DMA */

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

		dma_addr_t *dma_handle, gfp_t gfp)

{ return NULL; }

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

				      void *vaddr, dma_addr_t dma_handle) { }

#endif /* !CONFIG_HAS_DMA */



extern void *dmam_alloc_attrs(struct device *dev, size_t size,

			      dma_addr_t *dma_handle, gfp_t gfp,

			      unsigned long attrs);

#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT

extern int dmam_declare_coherent_memory(struct device *dev,

					phys_addr_t phys_addr,

					dma_addr_t device_addr, size_t size,

					int flags);

extern void dmam_release_declared_memory(struct device *dev);

#else /* CONFIG_HAVE_GENERIC_DMA_COHERENT */

static inline int dmam_declare_coherent_memory(struct device *dev,

				phys_addr_t phys_addr, dma_addr_t device_addr,

				size_t size, gfp_t gfp)

{

	return 0;

}



static inline void dmam_release_declared_memory(struct device *dev)

{

	return dmam_alloc_attrs(dev, size, dma_handle, gfp,

			(gfp & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0);

}

#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */



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

				 dma_addr_t *dma_addr, gfp_t gfp)

kernel/dma/coherent.c

+0 −2
Original line number Diff line number Diff line
@@ -223,7 +223,6 @@ int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size, 
	 */

	return mem->flags & DMA_MEMORY_EXCLUSIVE;

}

EXPORT_SYMBOL(dma_alloc_from_dev_coherent);



void *dma_alloc_from_global_coherent(ssize_t size, dma_addr_t *dma_handle)

{
@@ -268,7 +267,6 @@ int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr) 


	return __dma_release_from_coherent(mem, order, vaddr);

}

EXPORT_SYMBOL(dma_release_from_dev_coherent);



int dma_release_from_global_coherent(int order, void *vaddr)

{