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| author | Ramesh Babu K V <ramesh.b.k.v@intel.com> | 2010-10-04 10:37:53 +0000 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-10-07 15:03:43 -0700 |
| commit | 576e3c394a6c427c9a1378ec88ef7eb97e731992 (patch) | |
| tree | 55cfcf13ac594a63d1f8056bca08c6db66edcb3e /include/linux/intel_mid_dma.h | |
| parent | 03b96dca010145f3896abcd443b7fddb9813a0e6 (diff) | |
| download | lwn-576e3c394a6c427c9a1378ec88ef7eb97e731992.tar.gz lwn-576e3c394a6c427c9a1378ec88ef7eb97e731992.zip | |
intel_mid_dma: Add sg list support to DMA driver
For a very high speed DMA various periphral devices need
scatter-gather list support. The DMA hardware support link list items.
This list can be circular also (adding new flag DMA_PREP_CIRCULAR_LIST)
Right now this flag is in driver header and should be moved to
dmaengine header file eventually
Signed-off-by: Ramesh Babu K V <ramesh.b.k.v@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/intel_mid_dma.h')
| -rw-r--r-- | include/linux/intel_mid_dma.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/intel_mid_dma.h b/include/linux/intel_mid_dma.h index d9d08b6269b6..befe3fbd9e28 100644 --- a/include/linux/intel_mid_dma.h +++ b/include/linux/intel_mid_dma.h @@ -27,6 +27,7 @@ #include <linux/dmaengine.h> +#define DMA_PREP_CIRCULAR_LIST (1 << 10) /*DMA transaction width, src and dstn width would be same The DMA length must be width aligned, for 32 bit width the length must be 32 bit (4bytes) aligned only*/ @@ -69,6 +70,7 @@ enum intel_mid_dma_msize { * @cfg_mode: DMA data transfer mode (per-per/mem-per/mem-mem) * @src_msize: Source DMA burst size * @dst_msize: Dst DMA burst size + * @per_addr: Periphral address * @device_instance: DMA peripheral device instance, we can have multiple * peripheral device connected to single DMAC */ @@ -80,6 +82,7 @@ struct intel_mid_dma_slave { enum intel_mid_dma_mode cfg_mode; /*mode configuration*/ enum intel_mid_dma_msize src_msize; /*size if src burst*/ enum intel_mid_dma_msize dst_msize; /*size of dst burst*/ + dma_addr_t per_addr; /*Peripheral address*/ unsigned int device_instance; /*0, 1 for periphral instance*/ }; |