bb7c4deb82
Add dma-debug interface debug_dma_mapping_error() to debug drivers that fail to check dma mapping errors on addresses returned by dma_map_single() and dma_map_page() interfaces. Signed-off-by: Shuah Khan <shuah.khan@hp.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_DMA_MAPPING_H
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#define __ASM_DMA_MAPPING_H
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#include <asm-generic/dma-coherent.h>
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#define ARCH_HAS_DMA_GET_REQUIRED_MASK
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extern struct dma_map_ops *dma_ops;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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if (unlikely(!dev) || !dev->archdata.dma_ops)
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return dma_ops;
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else
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return dev->archdata.dma_ops;
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}
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#include <asm-generic/dma-mapping-common.h>
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static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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return (dma_addr_t)paddr;
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}
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static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
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{
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return (phys_addr_t)dev_addr;
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dev_addr)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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debug_dma_mapping_error(dev, dev_addr);
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return ops->mapping_error(dev, dev_addr);
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}
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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return ops->dma_supported(dev, mask);
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}
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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if (!dev->dma_mask)
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return 0;
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return addr + size - 1 <= *dev->dma_mask;
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}
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static inline void dma_mark_clean(void *addr, size_t size)
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{
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}
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flags)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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void *vaddr;
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if (dma_alloc_from_coherent(dev, size, dma_handle, &vaddr))
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return vaddr;
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vaddr = ops->alloc(dev, size, dma_handle, flags, NULL);
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debug_dma_alloc_coherent(dev, size, *dma_handle, vaddr);
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return vaddr;
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dev_addr)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (dma_release_from_coherent(dev, get_order(size), vaddr))
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return;
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debug_dma_free_coherent(dev, size, vaddr, dev_addr);
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ops->free(dev, size, vaddr, dev_addr, NULL);
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}
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/*
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* There is no dma_cache_sync() implementation, so just return NULL here.
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*/
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static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *handle, gfp_t flags)
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{
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return NULL;
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}
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static inline void dma_free_noncoherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t handle)
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{
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}
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#endif /* __KERNEL__ */
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#endif /* __ASM_DMA_MAPPING_H */
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