diff options
Diffstat (limited to 'arch/microblaze/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/microblaze/include/asm/dma-mapping.h | 185 |
1 files changed, 99 insertions, 86 deletions
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h index 17336252a9b..ab353723076 100644 --- a/arch/microblaze/include/asm/dma-mapping.h +++ b/arch/microblaze/include/asm/dma-mapping.h @@ -1,129 +1,142 @@ /* - * Copyright (C) 2006 Atmark Techno, Inc. + * Implements the generic device dma API for microblaze and the pci * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. + * Copyright (C) 2009-2010 Michal Simek <monstr@monstr.eu> + * Copyright (C) 2009-2010 PetaLogix + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * This file is base on powerpc and x86 dma-mapping.h versions + * Copyright (C) 2004 IBM */ #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H #define _ASM_MICROBLAZE_DMA_MAPPING_H +/* + * See Documentation/DMA-API-HOWTO.txt and + * Documentation/DMA-API.txt for documentation. + */ + +#include <linux/types.h> +#include <linux/cache.h> +#include <linux/mm.h> +#include <linux/scatterlist.h> +#include <linux/dma-debug.h> +#include <linux/dma-attrs.h> +#include <asm/io.h> +#include <asm-generic/dma-coherent.h> #include <asm/cacheflush.h> -#include <linux/io.h> -#include <linux/bug.h> -struct scatterlist; +#define DMA_ERROR_CODE (~(dma_addr_t)0x0) -#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_alloc_coherent(dev, gfp, size, handle) NULL +#define __dma_free_coherent(size, addr) ((void)0) -/* FIXME */ -static inline int -dma_supported(struct device *dev, u64 mask) -{ - return 1; -} +/* + * Available generic sets of operations + */ +extern struct dma_map_ops dma_direct_ops; -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) +static inline struct dma_map_ops *get_dma_ops(struct device *dev) { - BUG(); - return 0; + return &dma_direct_ops; } -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, - enum dma_data_direction direction) +static inline int dma_supported(struct device *dev, u64 mask) { - BUG(); + struct dma_map_ops *ops = get_dma_ops(dev); + + if (unlikely(!ops)) + return 0; + if (!ops->dma_supported) + return 1; + return ops->dma_supported(dev, mask); } -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction) +static inline int dma_set_mask(struct device *dev, u64 dma_mask) { - BUG(); + struct dma_map_ops *ops = get_dma_ops(dev); + + if (unlikely(ops == NULL)) + return -EIO; + if (ops->set_dma_mask) + return ops->set_dma_mask(dev, dma_mask); + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + *dev->dma_mask = dma_mask; return 0; } -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, - enum dma_data_direction direction) -{ - BUG(); -} +#include <asm-generic/dma-mapping-common.h> -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) +static inline void __dma_sync(unsigned long paddr, + size_t size, enum dma_data_direction direction) { - BUG(); + switch (direction) { + case DMA_TO_DEVICE: + case DMA_BIDIRECTIONAL: + flush_dcache_range(paddr, paddr + size); + break; + case DMA_FROM_DEVICE: + invalidate_dcache_range(paddr, paddr + size); + break; + default: + 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) +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { - BUG(); -} + struct dma_map_ops *ops = get_dma_ops(dev); -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG(); -} + debug_dma_mapping_error(dev, dma_addr); + if (ops->mapping_error) + return ops->mapping_error(dev, dma_addr); -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG(); + return (dma_addr == DMA_ERROR_CODE); } -static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return 0; -} +#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) -static inline void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, int flag) -{ - return NULL; /* consistent_alloc(flag, size, dma_handle); */ -} +#define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL) -static inline void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) +static inline void *dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag, + struct dma_attrs *attrs) { - BUG(); + struct dma_map_ops *ops = get_dma_ops(dev); + void *memory; + + BUG_ON(!ops); + + memory = ops->alloc(dev, size, dma_handle, flag, attrs); + + debug_dma_alloc_coherent(dev, size, *dma_handle, memory); + return memory; } -static inline dma_addr_t -dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction) +#define dma_free_coherent(d,s,c,h) dma_free_attrs(d, s, c, h, NULL) + +static inline void dma_free_attrs(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle, + struct dma_attrs *attrs) { - BUG_ON(direction == DMA_NONE); + struct dma_map_ops *ops = get_dma_ops(dev); - return virt_to_bus(ptr); + BUG_ON(!ops); + debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); + ops->free(dev, size, cpu_addr, dma_handle, attrs); } -static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, - size_t size, - enum dma_data_direction direction) +static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction direction) { - switch (direction) { - case DMA_FROM_DEVICE: - flush_dcache_range((unsigned)dma_addr, - (unsigned)dma_addr + size); - /* Fall through */ - case DMA_TO_DEVICE: - break; - default: - BUG(); - } + BUG_ON(direction == DMA_NONE); + __dma_sync(virt_to_phys(vaddr), size, (int)direction); } -#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ +#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */ |