Commit 2f5388a2 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

dma-direct: remove dma_direct_{alloc,free}_pages 



Just merge these helpers into the main dma_direct_{alloc,free} routines,
as the additional checks are always false for the two callers.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
parent abdaf11a

arch/x86/kernel/amd_gart_64.c

+3 −3
Original line number Diff line number Diff line
@@ -467,7 +467,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, 
{

	void *vaddr;



	vaddr = dma_direct_alloc_pages(dev, size, dma_addr, flag, attrs);

	vaddr = dma_direct_alloc(dev, size, dma_addr, flag, attrs);

	if (!vaddr ||

	    !force_iommu || dev->coherent_dma_mask <= DMA_BIT_MASK(24))

		return vaddr;
@@ -479,7 +479,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, 
		goto out_free;

	return vaddr;

out_free:

	dma_direct_free_pages(dev, size, vaddr, *dma_addr, attrs);

	dma_direct_free(dev, size, vaddr, *dma_addr, attrs);

	return NULL;

}
@@ -489,7 +489,7 @@ gart_free_coherent(struct device *dev, size_t size, void *vaddr, 
		   dma_addr_t dma_addr, unsigned long attrs)

{

	gart_unmap_page(dev, dma_addr, size, DMA_BIDIRECTIONAL, 0);

	dma_direct_free_pages(dev, size, vaddr, dma_addr, attrs);

	dma_direct_free(dev, size, vaddr, dma_addr, attrs);

}



static int no_agp;

include/linux/dma-direct.h

+0 −4
Original line number Diff line number Diff line
@@ -77,10 +77,6 @@ void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, 
		gfp_t gfp, unsigned long attrs);

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

		dma_addr_t dma_addr, unsigned long attrs);

void *dma_direct_alloc_pages(struct device *dev, size_t size,

		dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs);

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

		dma_addr_t dma_addr, unsigned long attrs);

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

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs);

kernel/dma/direct.c

+15 −24
Original line number Diff line number Diff line
@@ -151,13 +151,18 @@ again: 
	return page;

}



void *dma_direct_alloc_pages(struct device *dev, size_t size,

void *dma_direct_alloc(struct device *dev, size_t size,

		dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)

{

	struct page *page;

	void *ret;

	int err;



	if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&

	    !IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&

	    dma_alloc_need_uncached(dev, attrs))

		return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);



	size = PAGE_ALIGN(size);



	if (dma_should_alloc_from_pool(dev, gfp, attrs)) {
@@ -256,11 +261,18 @@ out_free_pages: 
	return NULL;

}



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

		dma_addr_t dma_addr, unsigned long attrs)

void dma_direct_free(struct device *dev, size_t size,

		void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs)

{

	unsigned int page_order = get_order(size);



	if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&

	    !IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&

	    dma_alloc_need_uncached(dev, attrs)) {

		arch_dma_free(dev, size, cpu_addr, dma_addr, attrs);

		return;

	}



	/* If cpu_addr is not from an atomic pool, dma_free_from_pool() fails */

	if (dma_should_free_from_pool(dev, attrs) &&

	    dma_free_from_pool(dev, cpu_addr, PAGE_ALIGN(size)))
@@ -284,27 +296,6 @@ void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr, 
	dma_free_contiguous(dev, dma_direct_to_page(dev, dma_addr), size);

}



void *dma_direct_alloc(struct device *dev, size_t size,

		dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)

{

	if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&

	    !IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&

	    dma_alloc_need_uncached(dev, attrs))

		return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);

	return dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);

}



void dma_direct_free(struct device *dev, size_t size,

		void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs)

{

	if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&

	    !IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&

	    dma_alloc_need_uncached(dev, attrs))

		arch_dma_free(dev, size, cpu_addr, dma_addr, attrs);

	else

		dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);

}



#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \

    defined(CONFIG_SWIOTLB)

void dma_direct_sync_sg_for_device(struct device *dev,

kernel/dma/pool.c

+1 −1
Original line number Diff line number Diff line
@@ -115,7 +115,7 @@ static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size, 
#endif

	/*

	 * Memory in the atomic DMA pools must be unencrypted, the pools do not

	 * shrink so no re-encryption occurs in dma_direct_free_pages().

	 * shrink so no re-encryption occurs in dma_direct_free().

	 */

	ret = set_memory_decrypted((unsigned long)page_to_virt(page),

				   1 << order);

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