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async_tx: structify submission arguments, add scribble

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Prepare the api for the arrival of a new parameter, 'scribble'.  This
will allow callers to identify scratchpad memory for dma address or page
address conversions.  As this adds yet another parameter, take this
opportunity to convert the common submission parameters (flags,
dependency, callback, and callback argument) into an object that is
passed by reference.

Also, take this opportunity to fix up the kerneldoc and add notes about
the relevant ASYNC_TX_* flags for each routine.

[ Impact: moves api pass-by-value parameters to a pass-by-reference struct ]

Signed-off-by: Andre Noll <[email protected]>
Acked-by: Maciej Sosnowski <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Dan Williams 2009-06-03 11:43:59 -07:00
commit a08abd8ca8
7 changed files with 200 additions and 174 deletions
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6
Documentation/crypto/async-tx-api.txt
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@ -54,11 +54,7 @@ features surfaced as a result:
3.1 General format of the API:
struct dma_async_tx_descriptor *
async_<operation>(<op specific parameters>,
enum async_tx_flags flags,
struct dma_async_tx_descriptor *dependency,
dma_async_tx_callback callback_routine,
void *callback_parameter);
async_<operation>(<op specific parameters>, struct async_submit ctl *submit)
3.2 Supported operations:
memcpy - memory copy between a source and a destination buffer