dd0fc66fb3
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
309 lines
7.1 KiB
C
309 lines
7.1 KiB
C
/* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com
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*
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* Implements the generic device dma API via the existing pci_ one
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* for unconverted architectures
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*/
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#ifndef _ASM_GENERIC_DMA_MAPPING_H
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#define _ASM_GENERIC_DMA_MAPPING_H
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#include <linux/config.h>
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#ifdef CONFIG_PCI
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/* we implement the API below in terms of the existing PCI one,
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* so include it */
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#include <linux/pci.h>
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/* need struct page definitions */
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#include <linux/mm.h>
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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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BUG_ON(dev->bus != &pci_bus_type);
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return pci_dma_supported(to_pci_dev(dev), mask);
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}
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static inline int
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dma_set_mask(struct device *dev, u64 dma_mask)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
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}
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static inline void *
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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
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}
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static inline void
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dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
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}
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static inline dma_addr_t
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dma_map_single(struct device *dev, void *cpu_addr, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
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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(dev->bus != &pci_bus_type);
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pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
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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,
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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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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
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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(dev->bus != &pci_bus_type);
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pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
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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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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
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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(dev->bus != &pci_bus_type);
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pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
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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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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
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size, (int)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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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
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size, (int)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 direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
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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 direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
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}
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static inline int
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dma_mapping_error(dma_addr_t dma_addr)
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{
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return pci_dma_mapping_error(dma_addr);
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}
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#else
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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 0;
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}
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static inline int
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dma_set_mask(struct device *dev, u64 dma_mask)
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{
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BUG();
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return 0;
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}
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static inline void *
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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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BUG();
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return NULL;
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}
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static inline void
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dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle)
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{
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BUG();
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}
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static inline dma_addr_t
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dma_map_single(struct device *dev, void *cpu_addr, size_t size,
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enum dma_data_direction direction)
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{
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BUG();
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return 0;
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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();
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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,
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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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BUG();
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return 0;
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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();
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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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BUG();
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return 0;
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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();
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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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BUG();
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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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BUG();
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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 direction)
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{
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BUG();
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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 direction)
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{
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BUG();
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}
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static inline int
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dma_error(dma_addr_t dma_addr)
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{
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return 0;
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}
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#endif
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/* Now for the API extensions over the pci_ one */
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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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#define dma_is_consistent(d) (1)
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static inline int
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dma_get_cache_alignment(void)
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{
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/* no easy way to get cache size on all processors, so return
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* the maximum possible, to be safe */
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return (1 << L1_CACHE_SHIFT_MAX);
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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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/* just sync everything, that's all the pci API can do */
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dma_sync_single_for_cpu(dev, 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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/* just sync everything, that's all the pci API can do */
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dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
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}
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static inline void
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dma_cache_sync(void *vaddr, size_t size,
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enum dma_data_direction direction)
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{
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/* could define this in terms of the dma_cache ... operations,
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* but if you get this on a platform, you should convert the platform
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* to using the generic device DMA API */
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BUG();
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}
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#endif
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