forked from Minki/linux
abd9a0c360
In dma_free_coherent call debug_dma_free_coherent before deallocating the memory to avoid a possible use after free. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
#ifndef _ASM_S390_DMA_MAPPING_H
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#define _ASM_S390_DMA_MAPPING_H
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/dma-attrs.h>
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#include <linux/dma-debug.h>
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#include <linux/io.h>
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#define DMA_ERROR_CODE (~(dma_addr_t) 0x0)
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extern struct dma_map_ops s390_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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return &s390_dma_ops;
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}
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extern int dma_set_mask(struct device *dev, u64 mask);
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static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction direction)
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{
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}
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
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#include <asm-generic/dma-mapping-common.h>
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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 *dma_ops = get_dma_ops(dev);
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if (dma_ops->dma_supported == NULL)
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return 1;
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return dma_ops->dma_supported(dev, mask);
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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 int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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struct dma_map_ops *dma_ops = get_dma_ops(dev);
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if (dma_ops->mapping_error)
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return dma_ops->mapping_error(dev, dma_addr);
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return (dma_addr == 0UL);
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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 flag)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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void *ret;
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ret = ops->alloc(dev, size, dma_handle, flag, NULL);
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debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
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return ret;
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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 *cpu_addr, dma_addr_t dma_handle)
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{
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struct dma_map_ops *dma_ops = get_dma_ops(dev);
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debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
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dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
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}
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#endif /* _ASM_S390_DMA_MAPPING_H */
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