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/openrisc/include/asm/dma-mapping.h | 110 +++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 kernel/arch/openrisc/include/asm/dma-mapping.h (limited to 'kernel/arch/openrisc/include/asm/dma-mapping.h') diff --git a/kernel/arch/openrisc/include/asm/dma-mapping.h b/kernel/arch/openrisc/include/asm/dma-mapping.h new file mode 100644 index 000000000..fab8628e1 --- /dev/null +++ b/kernel/arch/openrisc/include/asm/dma-mapping.h @@ -0,0 +1,110 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2010-2011 Jonas Bonn + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_DMA_MAPPING_H +#define __ASM_OPENRISC_DMA_MAPPING_H + +/* + * See Documentation/DMA-API-HOWTO.txt and + * Documentation/DMA-API.txt for documentation. + */ + +#include +#include +#include +#include + +#define DMA_ERROR_CODE (~(dma_addr_t)0x0) + +extern struct dma_map_ops or1k_dma_map_ops; + +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + return &or1k_dma_map_ops; +} + +#include + +#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) + +static inline void *dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + void *memory; + + memory = ops->alloc(dev, size, dma_handle, gfp, attrs); + + debug_dma_alloc_coherent(dev, size, *dma_handle, memory); + + return memory; +} + +#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) +{ + struct dma_map_ops *ops = get_dma_ops(dev); + + debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); + + ops->free(dev, size, cpu_addr, dma_handle, attrs); +} + +static inline void *dma_alloc_noncoherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ + struct dma_attrs attrs; + + dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs); + + return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs); +} + +static inline void dma_free_noncoherent(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle) +{ + struct dma_attrs attrs; + + dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs); + + dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs); +} + +static inline int dma_supported(struct device *dev, u64 dma_mask) +{ + /* Support 32 bit DMA mask exclusively */ + return dma_mask == DMA_BIT_MASK(32); +} + +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return 0; +} + +static inline int dma_set_mask(struct device *dev, u64 dma_mask) +{ + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + + *dev->dma_mask = dma_mask; + + return 0; +} +#endif /* __ASM_OPENRISC_DMA_MAPPING_H */ -- cgit 1.2.3-korg