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https://github.com/edk2-porting/linux-next.git
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367b8112fe
Move all header files for xtensa to arch/xtensa/include and platform and variant header files to the appropriate arch/xtensa/platforms/ and arch/xtensa/variants/ directories. Moving the files gets also rid of all uses of symlinks in the Makefile. This has been completed already for the majority of the architectures and xtensa is one out of six missing. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
180 lines
4.3 KiB
C
180 lines
4.3 KiB
C
/*
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* include/asm-xtensa/dma-mapping.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_DMA_MAPPING_H
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#define _XTENSA_DMA_MAPPING_H
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#include <asm/cache.h>
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#include <asm/io.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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/*
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* DMA-consistent mapping functions.
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*/
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extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long);
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extern void consistent_free(void*, size_t, dma_addr_t);
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extern void consistent_sync(void*, size_t, int);
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
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void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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static inline dma_addr_t
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dma_map_single(struct device *dev, void *ptr, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(direction == DMA_NONE);
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consistent_sync(ptr, size, direction);
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return virt_to_phys(ptr);
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}
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static inline void
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dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(direction == DMA_NONE);
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}
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static inline int
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dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction)
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{
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int i;
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BUG_ON(direction == DMA_NONE);
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for (i = 0; i < nents; i++, sg++ ) {
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BUG_ON(!sg_page(sg));
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sg->dma_address = sg_phys(sg);
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consistent_sync(sg_virt(sg), sg->length, direction);
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}
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return nents;
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}
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static inline dma_addr_t
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dma_map_page(struct device *dev, struct page *page, unsigned long offset,
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size_t size, enum dma_data_direction direction)
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{
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BUG_ON(direction == DMA_NONE);
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return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + offset;
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}
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static inline void
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dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(direction == DMA_NONE);
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}
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static inline void
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dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
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enum dma_data_direction direction)
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{
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BUG_ON(direction == DMA_NONE);
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}
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static inline void
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dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
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}
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static inline void
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dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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consistent_sync((void *)bus_to_virt(dma_handle), size, direction);
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}
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static inline void
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dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
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}
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static inline void
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dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction);
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction dir)
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{
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int i;
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for (i = 0; i < nelems; i++, sg++)
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consistent_sync(sg_virt(sg), sg->length, dir);
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}
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static inline void
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dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction dir)
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{
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int i;
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for (i = 0; i < nelems; i++, sg++)
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consistent_sync(sg_virt(sg), sg->length, dir);
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}
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static inline int
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dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return 0;
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}
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static inline int
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dma_supported(struct device *dev, u64 mask)
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{
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return 1;
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}
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static inline int
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dma_set_mask(struct device *dev, u64 mask)
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{
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if(!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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static inline int
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dma_get_cache_alignment(void)
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{
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return L1_CACHE_BYTES;
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}
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#define dma_is_consistent(d, h) (1)
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static inline void
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dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction direction)
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{
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consistent_sync(vaddr, size, direction);
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}
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#endif /* _XTENSA_DMA_MAPPING_H */
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