WebSVN - shark - Blame - Rev 422 - /shark/trunk/drivers/linuxc26/include/asm-generic/dma-mapping.h

Rev	Author	Line No.	Line
422	giacomo	1	/* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com
		2	*
		3	* Implements the generic device dma API via the existing pci_ one
		4	* for unconverted architectures
		5	*/
		6
		7	#ifndef _ASM_GENERIC_DMA_MAPPING_H
		8	#define _ASM_GENERIC_DMA_MAPPING_H
		9
		10	/* we implement the API below in terms of the existing PCI one,
		11	* so include it */
		12	#include <linux/pci.h>
		13	/* need struct page definitions */
		14	#include <linux/mm.h>
		15
		16	static inline int
		17	dma_supported(struct device *dev, u64 mask)
		18	{
		19	BUG_ON(dev->bus != &pci_bus_type);
		20
		21	return pci_dma_supported(to_pci_dev(dev), mask);
		22	}
		23
		24	static inline int
		25	dma_set_mask(struct device *dev, u64 dma_mask)
		26	{
		27	BUG_ON(dev->bus != &pci_bus_type);
		28
		29	return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
		30	}
		31
		32	static inline void *
		33	dma_alloc_coherent(struct device dev, size_t size, dma_addr_t dma_handle,
		34	int flag)
		35	{
		36	BUG_ON(dev->bus != &pci_bus_type);
		37
		38	return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
		39	}
		40
		41	static inline void
		42	dma_free_coherent(struct device dev, size_t size, void cpu_addr,
		43	dma_addr_t dma_handle)
		44	{
		45	BUG_ON(dev->bus != &pci_bus_type);
		46
		47	pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
		48	}
		49
		50	static inline dma_addr_t
		51	dma_map_single(struct device dev, void cpu_addr, size_t size,
		52	enum dma_data_direction direction)
		53	{
		54	BUG_ON(dev->bus != &pci_bus_type);
		55
		56	return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
		57	}
		58
		59	static inline void
		60	dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
		61	enum dma_data_direction direction)
		62	{
		63	BUG_ON(dev->bus != &pci_bus_type);
		64
		65	pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
		66	}
		67
		68	static inline dma_addr_t
		69	dma_map_page(struct device dev, struct page page,
		70	unsigned long offset, size_t size,
		71	enum dma_data_direction direction)
		72	{
		73	BUG_ON(dev->bus != &pci_bus_type);
		74
		75	return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
		76	}
		77
		78	static inline void
		79	dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
		80	enum dma_data_direction direction)
		81	{
		82	BUG_ON(dev->bus != &pci_bus_type);
		83
		84	pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
		85	}
		86
		87	static inline int
		88	dma_map_sg(struct device dev, struct scatterlist sg, int nents,
		89	enum dma_data_direction direction)
		90	{
		91	BUG_ON(dev->bus != &pci_bus_type);
		92
		93	return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
		94	}
		95
		96	static inline void
		97	dma_unmap_sg(struct device dev, struct scatterlist sg, int nhwentries,
		98	enum dma_data_direction direction)
		99	{
		100	BUG_ON(dev->bus != &pci_bus_type);
		101
		102	pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
		103	}
		104
		105	static inline void
		106	dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
		107	enum dma_data_direction direction)
		108	{
		109	BUG_ON(dev->bus != &pci_bus_type);
		110
		111	pci_dma_sync_single(to_pci_dev(dev), dma_handle, size, (int)direction);
		112	}
		113
		114	static inline void
		115	dma_sync_sg(struct device dev, struct scatterlist sg, int nelems,
		116	enum dma_data_direction direction)
		117	{
		118	BUG_ON(dev->bus != &pci_bus_type);
		119
		120	pci_dma_sync_sg(to_pci_dev(dev), sg, nelems, (int)direction);
		121	}
		122
		123	/* Now for the API extensions over the pci_ one */
		124
		125	#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
		126	#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
		127	#define dma_is_consistent(d) (1)
		128
		129	static inline int
		130	dma_get_cache_alignment(void)
		131	{
		132	/* no easy way to get cache size on all processors, so return
		133	* the maximum possible, to be safe */
		134	return (1 << L1_CACHE_SHIFT_MAX);
		135	}
		136
		137	static inline void
		138	dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
		139	unsigned long offset, size_t size,
		140	enum dma_data_direction direction)
		141	{
		142	/* just sync everything, that's all the pci API can do */
		143	dma_sync_single(dev, dma_handle, offset+size, direction);
		144	}
		145
		146	static inline void
		147	dma_cache_sync(void *vaddr, size_t size,
		148	enum dma_data_direction direction)
		149	{
		150	/* could define this in terms of the dma_cache ... operations,
		151	* but if you get this on a platform, you should convert the platform
		152	* to using the generic device DMA API */
		153	BUG();
		154	}
		155
		156	#endif
		157

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(root)/shark/trunk/drivers/linuxc26/include/asm-generic/dma-mapping.h - Rev 422