[PATCH 0/6] crypto: engine - Permit to enqueue all async requests

[Corentin Labbe]

Hello

The current crypto_engine support only ahash and ablkcipher request.
My first patch which try to add skcipher was Nacked, it will add too many functions
and adding other algs(aead, asymetric_key) will make the situation worst.

This patchset remove all algs specific stuff and now only process generic crypto_async_request.

The requests handler function pointer are now moved out of struct engine and
are now stored directly in a crypto_engine_reqctx.

The original proposal of Herbert [1] cannot be done completly since the crypto_engine
could only dequeue crypto_async_request and it is impossible to access any request_ctx
without knowing the underlying request type.

So I do something near that was requested: adding crypto_engine_reqctx in TFM context.
Note that the current implementation expect that crypto_engine_reqctx
is the first member of the context.

The first patch is a try to document the crypto engine API.
The second patch convert the crypto engine with the new way,
while the following patchs convert the 4 existing users of crypto_engine.
Note that this split break bisection, so probably the final commit will be all merged.

Appart from virtio, all 4 latest patch were compile tested only.
But the crypto engine is tested with my new sun8i-ce driver.

Regards

[1] https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1474434.html

Changes since RFC:
- Added a documentation patch
- Added patch for stm32-cryp
- Changed parameter of all crypto_engine_op functions from
  crypto_async_request to void*
- Reintroduced crypto_transfer_xxx_request_to_engine functions

Corentin Labbe (6):
  Documentation: crypto: document crypto engine API
  crypto: engine - Permit to enqueue all async requests
  crypto: omap: convert to new crypto engine API
  crypto: virtio: convert to new crypto engine API
  crypto: stm32-hash: convert to the new crypto engine API
  crypto: stm32-cryp: convert to the new crypto engine API

 Documentation/crypto/crypto_engine.rst       |  46 ++++++
 crypto/crypto_engine.c                       | 230 +++++++++++++--------------
 drivers/crypto/omap-aes.c                    |  17 +-
 drivers/crypto/omap-aes.h                    |   3 +
 drivers/crypto/omap-des.c                    |  20 ++-
 drivers/crypto/stm32/stm32-cryp.c            |  21 ++-
 drivers/crypto/stm32/stm32-hash.c            |  18 ++-
 drivers/crypto/virtio/virtio_crypto_algs.c   |  10 +-
 drivers/crypto/virtio/virtio_crypto_common.h |   3 +-
 drivers/crypto/virtio/virtio_crypto_core.c   |   3 -
 include/crypto/engine.h                      |  59 ++++---
 11 files changed, 263 insertions(+), 167 deletions(-)
 create mode 100644 Documentation/crypto/crypto_engine.rst

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2.13.6