diff options
Diffstat (limited to 'arch/xtensa/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/xtensa/include/asm/dma-mapping.h | 186 |
1 files changed, 39 insertions, 147 deletions
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h index 1f5f6dc09736..f01cb3044e50 100644 --- a/arch/xtensa/include/asm/dma-mapping.h +++ b/arch/xtensa/include/asm/dma-mapping.h @@ -1,11 +1,10 @@ /* - * include/asm-xtensa/dma-mapping.h - * * 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) 2003 - 2005 Tensilica Inc. + * Copyright (C) 2015 Cadence Design Systems Inc. */ #ifndef _XTENSA_DMA_MAPPING_H @@ -13,142 +12,67 @@ #include <asm/cache.h> #include <asm/io.h> + +#include <asm-generic/dma-coherent.h> + #include <linux/mm.h> #include <linux/scatterlist.h> #define DMA_ERROR_CODE (~(dma_addr_t)0x0) -/* - * DMA-consistent mapping functions. - */ - -extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long); -extern void consistent_free(void*, size_t, dma_addr_t); -extern void consistent_sync(void*, size_t, int); - -#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) - -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag); +extern struct dma_map_ops xtensa_dma_map_ops; -void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle); - -static inline dma_addr_t -dma_map_single(struct device *dev, void *ptr, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - consistent_sync(ptr, size, direction); - return virt_to_phys(ptr); -} - -static inline void -dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction direction) +static inline struct dma_map_ops *get_dma_ops(struct device *dev) { - BUG_ON(direction == DMA_NONE); + if (dev && dev->archdata.dma_ops) + return dev->archdata.dma_ops; + else + return &xtensa_dma_map_ops; } -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, - enum dma_data_direction direction) -{ - int i; - struct scatterlist *sg; - - BUG_ON(direction == DMA_NONE); - - for_each_sg(sglist, sg, nents, i) { - BUG_ON(!sg_page(sg)); +#include <asm-generic/dma-mapping-common.h> - sg->dma_address = sg_phys(sg); - consistent_sync(sg_virt(sg), sg->length, direction); - } +#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL) +#define dma_free_noncoherent(d, s, v, h) dma_free_attrs(d, s, v, h, NULL) +#define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL) +#define dma_free_coherent(d, s, c, h) dma_free_attrs(d, s, c, h, NULL) - return nents; -} - -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(direction == DMA_NONE); - return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + offset; -} - -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, - enum dma_data_direction direction) +static inline void *dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) { - BUG_ON(direction == DMA_NONE); -} + void *ret; + struct dma_map_ops *ops = get_dma_ops(dev); + if (dma_alloc_from_coherent(dev, size, dma_handle, &ret)) + return ret; -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); -} - -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - consistent_sync((void *)bus_to_virt(dma_handle), size, direction); -} + ret = ops->alloc(dev, size, dma_handle, gfp, attrs); + debug_dma_alloc_coherent(dev, size, *dma_handle, ret); -static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction) -{ - consistent_sync((void *)bus_to_virt(dma_handle), size, direction); + return ret; } -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) -{ - - consistent_sync((void *)bus_to_virt(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) +static inline void dma_free_attrs(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs) { + struct dma_map_ops *ops = get_dma_ops(dev); - consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); -} -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, - enum dma_data_direction dir) -{ - int i; - struct scatterlist *sg; + if (dma_release_from_coherent(dev, get_order(size), vaddr)) + return; - for_each_sg(sglist, sg, nelems, i) - consistent_sync(sg_virt(sg), sg->length, dir); + ops->free(dev, size, vaddr, dma_handle, attrs); + debug_dma_free_coherent(dev, size, vaddr, dma_handle); } -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction dir) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sglist, sg, nelems, i) - consistent_sync(sg_virt(sg), sg->length, dir); -} static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { - return 0; + struct dma_map_ops *ops = get_dma_ops(dev); + + debug_dma_mapping_error(dev, dma_addr); + return ops->mapping_error(dev, dma_addr); } static inline int @@ -168,39 +92,7 @@ dma_set_mask(struct device *dev, u64 mask) return 0; } -static inline void -dma_cache_sync(struct device *dev, void *vaddr, size_t size, - enum dma_data_direction direction) -{ - consistent_sync(vaddr, size, direction); -} - -/* Not supported for now */ -static inline int dma_mmap_coherent(struct device *dev, - struct vm_area_struct *vma, void *cpu_addr, - dma_addr_t dma_addr, size_t size) -{ - return -EINVAL; -} - -static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt, - void *cpu_addr, dma_addr_t dma_addr, - size_t size) -{ - return -EINVAL; -} - -static inline void *dma_alloc_attrs(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag, - struct dma_attrs *attrs) -{ - return NULL; -} - -static inline void dma_free_attrs(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle, - struct dma_attrs *attrs) -{ -} +void dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction direction); #endif /* _XTENSA_DMA_MAPPING_H */ |