Commit 5121872a authored by Stefano Stabellini's avatar Stefano Stabellini Committed by David Vrabel
Browse files

xen/arm/arm64: merge xen/mm32.c into xen/mm.c 



Merge xen/mm32.c into xen/mm.c.
As a consequence the code gets compiled on arm64 too.

Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 3567258d

arch/arm/xen/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-y		:= enlighten.o hypercall.o grant-table.o p2m.o mm.o mm32.o
 
obj-y		:= enlighten.o hypercall.o grant-table.o p2m.o mm.o

arch/arm/xen/mm.c

+84 −0
Original line number Diff line number Diff line 
#include <linux/cpu.h>

#include <linux/dma-mapping.h>

#include <linux/bootmem.h>

#include <linux/gfp.h>

#include <linux/highmem.h>

#include <linux/export.h>

#include <linux/of_address.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <linux/dma-mapping.h>
@@ -16,6 +20,86 @@ 
#include <asm/xen/hypercall.h>

#include <asm/xen/interface.h>



enum dma_cache_op {

       DMA_UNMAP,

       DMA_MAP,

};



/* functions called by SWIOTLB */



static void dma_cache_maint(dma_addr_t handle, unsigned long offset,

	size_t size, enum dma_data_direction dir, enum dma_cache_op op)

{

	unsigned long pfn;

	size_t left = size;



	pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;

	offset %= PAGE_SIZE;



	do {

		size_t len = left;

	

		/* TODO: cache flush */



		offset = 0;

		pfn++;

		left -= len;

	} while (left);

}



static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir)

{

	dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_UNMAP);

}



static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir)

{

	dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_MAP);

}



void __xen_dma_map_page(struct device *hwdev, struct page *page,

	     dma_addr_t dev_addr, unsigned long offset, size_t size,

	     enum dma_data_direction dir, struct dma_attrs *attrs)

{

	if (is_device_dma_coherent(hwdev))

		return;

	if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))

		return;



	__xen_dma_page_cpu_to_dev(hwdev, dev_addr, size, dir);

}



void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir,

		struct dma_attrs *attrs)



{

	if (is_device_dma_coherent(hwdev))

		return;

	if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))

		return;



	__xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);

}



void __xen_dma_sync_single_for_cpu(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

	if (is_device_dma_coherent(hwdev))

		return;

	__xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);

}



void __xen_dma_sync_single_for_device(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

	if (is_device_dma_coherent(hwdev))

		return;

	__xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);

}



int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,

				 unsigned int address_bits,

				 dma_addr_t *dma_handle)

arch/arm/xen/mm32.c

deleted100644 → 0
+0 −94
Original line number Diff line number Diff line 
#include <linux/cpu.h>

#include <linux/dma-mapping.h>

#include <linux/gfp.h>

#include <linux/highmem.h>



#include <xen/features.h>

enum dma_cache_op {

       DMA_UNMAP,

       DMA_MAP,

};



/* functions called by SWIOTLB */



static void dma_cache_maint(dma_addr_t handle, unsigned long offset,

	size_t size, enum dma_data_direction dir, enum dma_cache_op op)

{

	unsigned long pfn;

	size_t left = size;



	pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;

	offset %= PAGE_SIZE;



	do {

		size_t len = left;

	

		/* TODO: cache flush */



		offset = 0;

		pfn++;

		left -= len;

	} while (left);

}



static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir)

{

	dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_UNMAP);

}



static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir)

{

	dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_MAP);

}



void __xen_dma_map_page(struct device *hwdev, struct page *page,

	     dma_addr_t dev_addr, unsigned long offset, size_t size,

	     enum dma_data_direction dir, struct dma_attrs *attrs)

{

	if (is_device_dma_coherent(hwdev))

		return;

	if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))

		return;



	__xen_dma_page_cpu_to_dev(hwdev, dev_addr, size, dir);

}



void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir,

		struct dma_attrs *attrs)



{

	if (is_device_dma_coherent(hwdev))

		return;

	if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))

		return;



	__xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);

}



void __xen_dma_sync_single_for_cpu(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

	if (is_device_dma_coherent(hwdev))

		return;

	__xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);

}



void __xen_dma_sync_single_for_device(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

	if (is_device_dma_coherent(hwdev))

		return;

	__xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);

}



int __init xen_mm32_init(void)

{

	if (!xen_initial_domain())

		return 0;



	return 0;

}

arch_initcall(xen_mm32_init);

arch/arm64/include/asm/xen/page-coherent.h

+1 −43
Original line number Diff line number Diff line 
#ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H

#define _ASM_ARM64_XEN_PAGE_COHERENT_H



#include <asm/page.h>

#include <linux/dma-attrs.h>

#include <linux/dma-mapping.h>



static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,

		dma_addr_t *dma_handle, gfp_t flags,

		struct dma_attrs *attrs)

{

	return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);

}



static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,

		void *cpu_addr, dma_addr_t dma_handle,

		struct dma_attrs *attrs)

{

	__generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);

}



static inline void xen_dma_map_page(struct device *hwdev, struct page *page,

	     dma_addr_t dev_addr, unsigned long offset, size_t size,

	     enum dma_data_direction dir, struct dma_attrs *attrs)

{

}



static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,

		size_t size, enum dma_data_direction dir,

		struct dma_attrs *attrs)

{

}



static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

}



static inline void xen_dma_sync_single_for_device(struct device *hwdev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir)

{

}

#endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */
 
#include <../../arm/include/asm/xen/page-coherent.h>

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