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crypto: engine - Introduce the block request crypto engine framework

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Now block cipher engines need to implement and maintain their own queue/thread
for processing requests, moreover currently helpers provided for only the queue
itself (in crypto_enqueue_request() and crypto_dequeue_request()) but they
don't help with the mechanics of driving the hardware (things like running the
request immediately, DMA map it or providing a thread to process the queue in)
even though a lot of that code really shouldn't vary that much from device to
device.

Thus this patch provides a mechanism for pushing requests to the hardware
as it becomes free that drivers could use. And this framework is patterned
on the SPI code and has worked out well there.
(https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
 drivers/spi/spi.c?id=ffbbdd21329f3e15eeca6df2d4bc11c04d9d91c0)

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Baolin Wang
2016-01-26 20:25:39 +08:00
committed by Herbert Xu
parent 9f93a8a0ba
commit 735d37b542
4 changed files with 429 additions and 0 deletions
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3
crypto/Kconfig
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@@ -217,6 +217,9 @@ config CRYPTO_GLUE_HELPER_X86
depends on X86
select CRYPTO_ALGAPI
config CRYPTO_ENGINE
tristate
comment "Authenticated Encryption with Associated Data"
config CRYPTO_CCM