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| author | Lucas Stach <dev@lynxeye.de> | 2015-03-05 22:49:58 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-03-06 07:51:51 +0100 |
| commit | a0c4e2203fdde7b2636eab3f1406ea66f0e0da19 (patch) | |
| tree | f7117216c02aa5cc0627d9377b4bdebad66166f6 /include | |
| parent | 682b7d849a56d500067ae93a4fdd29a32135d874 (diff) | |
| download | barebox-a0c4e2203fdde7b2636eab3f1406ea66f0e0da19.tar.gz barebox-a0c4e2203fdde7b2636eab3f1406ea66f0e0da19.tar.xz | |
dma: add streaming DMA ops
This will allow us to implement cache maintenance in a platform
agnostic way.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/dma-dir.h | 6 | ||||
| -rw-r--r-- | include/dma.h | 11 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/dma-dir.h b/include/dma-dir.h new file mode 100644 index 0000000000..ba107f10ce --- /dev/null +++ b/include/dma-dir.h @@ -0,0 +1,6 @@ +enum dma_data_direction { + DMA_BIDIRECTIONAL = 0, + DMA_TO_DEVICE = 1, + DMA_FROM_DEVICE = 2, + DMA_NONE = 3, +}; diff --git a/include/dma.h b/include/dma.h index 899f831faa..fb75eec678 100644 --- a/include/dma.h +++ b/include/dma.h @@ -11,6 +11,7 @@ #include <malloc.h> #include <xfuncs.h> +#include <dma-dir.h> #include <asm/dma.h> #ifndef dma_alloc @@ -27,4 +28,14 @@ static inline void dma_free(void *mem) } #endif +/* streaming DMA - implement the below calls to support HAS_DMA */ +void dma_sync_single_for_cpu(unsigned long address, size_t size, + enum dma_data_direction dir); + +void dma_sync_single_for_device(unsigned long address, size_t size, + enum dma_data_direction dir); + +void *dma_alloc_coherent(size_t size, dma_addr_t *dma_handle); +void dma_free_coherent(void *mem, dma_addr_t dma_handle, size_t size); + #endif /* __DMA_H */ |