From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/mn10300/include/asm/dma-mapping.h | 186 ++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 kernel/arch/mn10300/include/asm/dma-mapping.h (limited to 'kernel/arch/mn10300/include/asm/dma-mapping.h') diff --git a/kernel/arch/mn10300/include/asm/dma-mapping.h b/kernel/arch/mn10300/include/asm/dma-mapping.h new file mode 100644 index 000000000..a18abfc55 --- /dev/null +++ b/kernel/arch/mn10300/include/asm/dma-mapping.h @@ -0,0 +1,186 @@ +/* DMA mapping routines for the MN10300 arch + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_DMA_MAPPING_H +#define _ASM_DMA_MAPPING_H + +#include +#include + +#include +#include + +/* + * See Documentation/DMA-API.txt for the description of how the + * following DMA API should work. + */ + +extern void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, int flag); + +extern void dma_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle); + +#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 +dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); + mn10300_dcache_flush_inv(); + return virt_to_bus(ptr); +} + +static inline +void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ + BUG_ON(direction == DMA_NONE); +} + +static inline +int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, + enum dma_data_direction direction) +{ + struct scatterlist *sg; + int i; + + BUG_ON(!valid_dma_direction(direction)); + WARN_ON(nents == 0 || sglist[0].length == 0); + + for_each_sg(sglist, sg, nents, i) { + BUG_ON(!sg_page(sg)); + + sg->dma_address = sg_phys(sg); + } + + mn10300_dcache_flush_inv(); + return nents; +} + +static inline +void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, + enum dma_data_direction direction) +{ + BUG_ON(!valid_dma_direction(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(direction == DMA_NONE); + return page_to_bus(page) + offset; +} + +static inline +void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, + 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) +{ +} + +static inline +void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction direction) +{ + mn10300_dcache_flush_inv(); +} + +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) +{ +} + +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) +{ + mn10300_dcache_flush_inv(); +} + + +static inline +void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction direction) +{ +} + +static inline +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction direction) +{ + mn10300_dcache_flush_inv(); +} + +static inline +int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return 0; +} + +static inline +int dma_supported(struct device *dev, u64 mask) +{ + /* + * we fall back to GFP_DMA when the mask isn't all 1s, so we can't + * guarantee allocations that must be within a tighter range than + * GFP_DMA + */ + if (mask < 0x00ffffff) + return 0; + return 1; +} + +static inline +int dma_set_mask(struct device *dev, u64 mask) +{ + if (!dev->dma_mask || !dma_supported(dev, mask)) + return -EIO; + + *dev->dma_mask = mask; + return 0; +} + +static inline +void dma_cache_sync(void *vaddr, size_t size, + enum dma_data_direction direction) +{ + mn10300_dcache_flush_inv(); +} + +/* 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; +} + +#endif -- cgit 1.2.3-korg