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On 2/1/2012 2:16 PM, Vinod Koul wrote:
On Wed, 2012-02-01 at 14:07 +0530, Ravi Kumar V wrote:Our hardware supports single transfer mode,scatter gather mode& box mode. we are using these dmaengine API's for our HW device_prep_memcpy() for single mode. device_prep_dma_sg() for sg mode. device_prep_interleaved_dma() for box mode. We need to pass command configuration parameter to all of the above three modes and it can be possible if extra context parameter is added into these API'sbut again, is this static fr channel for each transfer. Would you be able to derive these for non box modes?
Command configuration parameter has this information which is used be our HW 1.Device Id for Synchronization & acknowledgment with slow clock devices. 2.Endian type. 3.Blocking/unblocking channel after/before transfer.Command configuration parameter should be passed in all the three modes and per transfer so this parameter is dynamic keep changing for each transfer.
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