Scott Wood [off-list ref] wrote on 11/24/2008 01:28:20 PM:

Bruce_Leonard@selinc.com wrote:

quoted

Maybe (with you clarification) this is starting to make sense.  It 

doesn't 

quoted

matter if the "src" is host memory or PCI space.  What the "src" and 

it's 

quoted

DMA_TO_DEVICE mapping is saying to the kernel is "this data needs to 

be 

quoted

moved into the DMA engine", while the "dest" and it's DMA_FROM_DEIVCE 
mapping is telling the kernel "this data needs to be moved from the 

DMA 

quoted

engine".

Right.

-Scott

Thank you sooooo much.  Now it makes sense.  I guess I was getting bogged 
down in the hardware sense of "src" and "dest"

Thanks again.

Bruce