diff options
author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-07-02 16:41:37 +0200 |
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committer | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-07-02 16:41:37 +0200 |
commit | 52409fae3e4b8d16b68b61902fc09075cd97b75d (patch) | |
tree | e67110145c5843b3f199d872ae285e2546c9ebe2 /backport-include/linux/dma-mapping.h |
Backports generated from 4.11 kernel
Initial commit.
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Diffstat (limited to 'backport-include/linux/dma-mapping.h')
-rw-r--r-- | backport-include/linux/dma-mapping.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/backport-include/linux/dma-mapping.h b/backport-include/linux/dma-mapping.h new file mode 100644 index 0000000..16b0e3c --- /dev/null +++ b/backport-include/linux/dma-mapping.h @@ -0,0 +1,35 @@ +#ifndef __BACKPORT_LINUX_DMA_MAPPING_H +#define __BACKPORT_LINUX_DMA_MAPPING_H +#include_next <linux/dma-mapping.h> +#include <linux/version.h> + +#if LINUX_VERSION_IS_LESS(3,2,0) +#define dma_zalloc_coherent LINUX_BACKPORT(dma_zalloc_coherent) +static inline void *dma_zalloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag) +{ + void *ret = dma_alloc_coherent(dev, size, dma_handle, flag); + if (ret) + memset(ret, 0, size); + return ret; +} +#endif + +#if LINUX_VERSION_IS_LESS(3,13,0) +/* + * Set both the DMA mask and the coherent DMA mask to the same thing. + * Note that we don't check the return value from dma_set_coherent_mask() + * as the DMA API guarantees that the coherent DMA mask can be set to + * the same or smaller than the streaming DMA mask. + */ +#define dma_set_mask_and_coherent LINUX_BACKPORT(dma_set_mask_and_coherent) +static inline int dma_set_mask_and_coherent(struct device *dev, u64 mask) +{ + int rc = dma_set_mask(dev, mask); + if (rc == 0) + dma_set_coherent_mask(dev, mask); + return rc; +} +#endif /* LINUX_VERSION_IS_LESS(3,13,0) */ + +#endif /* __BACKPORT_LINUX_DMA_MAPPING_H */ |