From 5deb3317cb51ac52de922bb55f8492624018906d Mon Sep 17 00:00:00 2001 From: Roman Yeryomin Date: Thu, 13 Sep 2012 00:40:35 +0300 Subject: Add realtek target files Signed-off-by: Roman Yeryomin --- .../linux/realtek/files/arch/rlx/mm/dma-default.c | 334 +++++++++++++++++++++ 1 file changed, 334 insertions(+) create mode 100644 target/linux/realtek/files/arch/rlx/mm/dma-default.c (limited to 'target/linux/realtek/files/arch/rlx/mm/dma-default.c') diff --git a/target/linux/realtek/files/arch/rlx/mm/dma-default.c b/target/linux/realtek/files/arch/rlx/mm/dma-default.c new file mode 100644 index 000000000..9fe69f2fb --- /dev/null +++ b/target/linux/realtek/files/arch/rlx/mm/dma-default.c @@ -0,0 +1,334 @@ +/* + * 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) 2000 Ani Joshi + * Copyright (C) 2000, 2001, 06 Ralf Baechle + * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + +static inline unsigned long dma_addr_to_virt(dma_addr_t dma_addr) +{ + unsigned long addr = plat_dma_addr_to_phys(dma_addr); + + return (unsigned long)phys_to_virt(addr); +} + +/* + * Warning on the terminology - Linux calls an uncached area coherent; + * MIPS terminology calls memory areas with hardware maintained coherency + * coherent. + */ + +static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp) +{ + /* ignore region specifiers */ + gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM); + +#ifdef CONFIG_ZONE_DMA + if (dev == NULL) + gfp |= __GFP_DMA; + else if (dev->coherent_dma_mask < DMA_BIT_MASK(24)) + gfp |= __GFP_DMA; + else + ; +#endif +#ifdef CONFIG_ZONE_DMA32 + if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) + gfp |= __GFP_DMA32; + else + ; +#endif + + /* Don't invoke OOM killer */ + gfp |= __GFP_NORETRY; + + return gfp; +} + +void *dma_alloc_noncoherent(struct device *dev, size_t size, + dma_addr_t * dma_handle, gfp_t gfp) +{ + void *ret; + + gfp = massage_gfp_flags(dev, gfp); + + ret = (void *) __get_free_pages(gfp, get_order(size)); + + if (ret != NULL) { + memset(ret, 0, size); + *dma_handle = plat_map_dma_mem(dev, ret, size); + } + + return ret; +} + +EXPORT_SYMBOL(dma_alloc_noncoherent); + +void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t * dma_handle, gfp_t gfp) +{ + void *ret; + + gfp = massage_gfp_flags(dev, gfp); + + ret = (void *) __get_free_pages(gfp, get_order(size)); + + if (ret) + { + memset(ret, 0, size); + *dma_handle = plat_map_dma_mem(dev, ret, size); + + dma_cache_wback_inv((unsigned long) ret, size); + ret = UNCAC_ADDR(ret); + } + + return ret; +} + +EXPORT_SYMBOL(dma_alloc_coherent); + +void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle) +{ + plat_unmap_dma_mem(dev, dma_handle); + free_pages((unsigned long) vaddr, get_order(size)); +} + +EXPORT_SYMBOL(dma_free_noncoherent); + +void dma_free_coherent(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle) +{ + unsigned long addr = (unsigned long) vaddr; + + plat_unmap_dma_mem(dev, dma_handle); + addr = CAC_ADDR(addr); + + free_pages(addr, get_order(size)); +} + +EXPORT_SYMBOL(dma_free_coherent); + +static inline void __dma_sync(unsigned long addr, size_t size, + enum dma_data_direction direction) +{ + switch (direction) { + case DMA_TO_DEVICE: + dma_cache_wback(addr, size); + break; + + case DMA_FROM_DEVICE: + dma_cache_inv(addr, size); + break; + + case DMA_BIDIRECTIONAL: + dma_cache_wback_inv(addr, size); + break; + + default: + BUG(); + } +} + +dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, + enum dma_data_direction direction) +{ + unsigned long addr = (unsigned long) ptr; + + __dma_sync(addr, size, direction); + + return plat_map_dma_mem(dev, ptr, size); +} + +EXPORT_SYMBOL(dma_map_single); + +void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ + plat_unmap_dma_mem(dev, dma_addr); +} + +EXPORT_SYMBOL(dma_unmap_single); + +int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction) +{ + int i; + + BUG_ON(direction == DMA_NONE); + + for (i = 0; i < nents; i++, sg++) + { + unsigned long addr; + + addr = (unsigned long) sg_virt(sg); + if (addr) + __dma_sync(addr, sg->length, direction); + + sg->dma_address = plat_map_dma_mem(dev, (void *)addr, sg->length); + } + + return nents; +} + +EXPORT_SYMBOL(dma_map_sg); + +dma_addr_t dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, enum dma_data_direction direction) +{ + unsigned long addr; + + BUG_ON(direction == DMA_NONE); + + addr = (unsigned long) page_address(page) + offset; + __dma_sync(addr, size, direction); + + return plat_map_dma_mem_page(dev, page) + offset; +} + +EXPORT_SYMBOL(dma_map_page); + +void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, + enum dma_data_direction direction) +{ + unsigned long addr; + int i; + + BUG_ON(direction == DMA_NONE); + + for (i = 0; i < nhwentries; i++, sg++) + { + if (direction != DMA_TO_DEVICE) + { + addr = (unsigned long) sg_virt(sg); + if (addr) + __dma_sync(addr, sg->length, direction); + } + + plat_unmap_dma_mem(dev, sg->dma_address); + } +} + +EXPORT_SYMBOL(dma_unmap_sg); + +void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); + + #ifdef CONFIG_ARCH_CPU_RLX5281 + __asm__ __volatile__( + ".set\tpush\n" + ".set\tnoreorder\n" + "\tmtc0\t$0, $20\n" + "\tli\t$8, 0x200\n" + "\tmtc0\t$8, $20\n" + ".set\tpop\n"); + #endif +} + +EXPORT_SYMBOL(dma_sync_single_for_cpu); + +void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction direction) +{ + unsigned long addr; + + BUG_ON(direction == DMA_NONE); + + plat_extra_sync_for_device(dev); + addr = dma_addr_to_virt(dma_handle); + __dma_sync(addr, size, direction); +} + +EXPORT_SYMBOL(dma_sync_single_for_device); + +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) +{ + BUG_ON(direction == DMA_NONE); +} + +EXPORT_SYMBOL(dma_sync_single_range_for_cpu); + +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) +{ + unsigned long addr; + BUG_ON(direction == DMA_NONE); + + plat_extra_sync_for_device(dev); + addr = dma_addr_to_virt(dma_handle); + __dma_sync(addr + offset, size, direction); +} + +EXPORT_SYMBOL(dma_sync_single_range_for_device); + +void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); +} + +EXPORT_SYMBOL(dma_sync_sg_for_cpu); + +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, + enum dma_data_direction direction) +{ + int i; + + BUG_ON(direction == DMA_NONE); + + /* Make sure that gcc doesn't leave the empty loop body. */ + for (i = 0; i < nelems; i++, sg++) + __dma_sync((unsigned long)page_address(sg_page(sg)), + sg->length, direction); +} + +EXPORT_SYMBOL(dma_sync_sg_for_device); + +int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return plat_dma_mapping_error(dev, dma_addr); +} + +EXPORT_SYMBOL(dma_mapping_error); + +int dma_supported(struct device *dev, u64 mask) +{ + return plat_dma_supported(dev, mask); +} + +EXPORT_SYMBOL(dma_supported); + +int dma_is_consistent(struct device *dev, dma_addr_t dma_addr) +{ + return 0; +} + +EXPORT_SYMBOL(dma_is_consistent); + +void dma_cache_sync(struct device *dev, void *vaddr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); + + plat_extra_sync_for_device(dev); + __dma_sync((unsigned long)vaddr, size, direction); +} + +EXPORT_SYMBOL(dma_cache_sync); -- cgit v1.2.3