From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-generic/dma-mapping.h | 309 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 309 insertions(+) create mode 100644 include/asm-generic/dma-mapping.h (limited to 'include/asm-generic/dma-mapping.h') diff --git a/include/asm-generic/dma-mapping.h b/include/asm-generic/dma-mapping.h new file mode 100644 index 00000000000..8cef663c5cd --- /dev/null +++ b/include/asm-generic/dma-mapping.h @@ -0,0 +1,309 @@ +/* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com + * + * Implements the generic device dma API via the existing pci_ one + * for unconverted architectures + */ + +#ifndef _ASM_GENERIC_DMA_MAPPING_H +#define _ASM_GENERIC_DMA_MAPPING_H + +#include + +#ifdef CONFIG_PCI + +/* we implement the API below in terms of the existing PCI one, + * so include it */ +#include +/* need struct page definitions */ +#include + +static inline int +dma_supported(struct device *dev, u64 mask) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_dma_supported(to_pci_dev(dev), mask); +} + +static inline int +dma_set_mask(struct device *dev, u64 dma_mask) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_set_dma_mask(to_pci_dev(dev), dma_mask); +} + +static inline void * +dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, + unsigned int __nocast flag) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle); +} + +static inline void +dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle); +} + +static inline dma_addr_t +dma_map_single(struct device *dev, void *cpu_addr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction); +} + +static inline void +dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction); +} + +static inline dma_addr_t +dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction); +} + +static inline void +dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction); +} + +static inline int +dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction); +} + +static inline void +dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction); +} + +static inline void +dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle, + size, (int)direction); +} + +static inline void +dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle, + size, (int)direction); +} + +static inline void +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction); +} + +static inline void +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG_ON(dev->bus != &pci_bus_type); + + pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction); +} + +static inline int +dma_mapping_error(dma_addr_t dma_addr) +{ + return pci_dma_mapping_error(dma_addr); +} + + +#else + +static inline int +dma_supported(struct device *dev, u64 mask) +{ + return 0; +} + +static inline int +dma_set_mask(struct device *dev, u64 dma_mask) +{ + BUG(); + return 0; +} + +static inline void * +dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, + unsigned int __nocast flag) +{ + BUG(); + return NULL; +} + +static inline void +dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + BUG(); +} + +static inline dma_addr_t +dma_map_single(struct device *dev, void *cpu_addr, size_t size, + enum dma_data_direction direction) +{ + BUG(); + return 0; +} + +static inline void +dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline dma_addr_t +dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + BUG(); + return 0; +} + +static inline void +dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline int +dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction) +{ + BUG(); + return 0; +} + +static inline void +dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline void +dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline void +dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline void +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline void +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG(); +} + +static inline int +dma_error(dma_addr_t dma_addr) +{ + return 0; +} + +#endif + +/* Now for the API extensions over the pci_ one */ + +#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) +#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) +#define dma_is_consistent(d) (1) + +static inline int +dma_get_cache_alignment(void) +{ + /* no easy way to get cache size on all processors, so return + * the maximum possible, to be safe */ + return (1 << L1_CACHE_SHIFT_MAX); +} + +static inline void +dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, + unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + /* just sync everything, that's all the pci API can do */ + dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction); +} + +static inline void +dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, + unsigned long offset, size_t size, + enum dma_data_direction direction) +{ + /* just sync everything, that's all the pci API can do */ + dma_sync_single_for_device(dev, dma_handle, offset+size, direction); +} + +static inline void +dma_cache_sync(void *vaddr, size_t size, + enum dma_data_direction direction) +{ + /* could define this in terms of the dma_cache ... operations, + * but if you get this on a platform, you should convert the platform + * to using the generic device DMA API */ + BUG(); +} + +#endif + -- cgit v1.2.3