linux-toradex.git/drivers/crypto/caam/Kconfig, branch v3.17.2

crypto: caam - Add Platform driver for Job Ring

2013-10-30T04:02:57+00:00

The SEC Job Rings are now available as individual devices.
This would enable sharing of job rings between kernel and
user space. Job Rings can now be dynamically bound/unbound
from kernel.

Changes are made in the following layers of CAAM Driver
1. Controller driver
        - Does basic initialization of CAAM Block.
        - Creates platform devices for Job Rings.
(Earlier the initialization of Job ring  was done
 by the controller driver)

2. JobRing Platform driver
        - Manages the platform Job Ring devices created
          by the controller driver

Signed-off-by: Ruchika Gupta 
Reviewed-by: Garg Vakul-B16394 
Signed-off-by: Herbert Xu

crypto: caam - add option for enabling DEBUG mode

2013-08-21T11:08:37+00:00

This patch adds an option to the Kconfig file for
SEC which enables the user to see the debug messages
that are printed inside the SEC driver.

Signed-off-by: Alex Porosanu 
Signed-off-by: Herbert Xu

crypto: caam - fix typo "CRYPTO_AHASH"

2013-03-10T10:16:36+00:00

The Kconfig entry for CAAM's hash algorithm implementations has always
selected CRYPTO_AHASH. But there's no corresponding Kconfig symbol.

It seems it was intended to select CRYPTO_HASH, like other crypto
drivers do. That would apparently (indirectly) select CRYPTO_HASH2,
which would enable the ahash functionality this driver uses.

Signed-off-by: Paul Bolle 
Reviewed-by: Kim Phillips 
Signed-off-by: Herbert Xu

crypto: caam - disable IRQ coalescing by default

2012-06-27T06:42:06+00:00

It has been observed that in zero-loss benchmarks, when a
slow traffic rate is being tested, the IRQ timer coalescing
parameter was set too high, and the ethernet controller
would start dropping packets because the job ring back half
wouldn't be executed in time before the ethernet controller
would fill its buffers, thereby significantly reducing the
zero-loss performance figures.

Empirical testing has shown that the best zero-loss performance
is achieved when IRQ coalescing is set to minimum values and/or
turned off, since apparently the job ring driver already implements
an adequately-performing general-purpose IRQ mitigation strategy
in software.

Whilst we could go with minimal count (2-8) and timing settings
(192-256), we prefer just turning h/w coalescing altogether off
to minimize setkey latency (due to split key generation), and
for consistent cross-SoC performance (the SEC vs. core clock
ratio changes).

Signed-off-by: Kim Phillips 
Signed-off-by: Herbert Xu

crypto: caam - hwrng support

2012-06-27T06:42:06+00:00

caam_read copies random bytes from two buffers into output.

caam rng can fill empty buffer 0xffff bytes at a time,
but the buffer sizes are rounded down to multiple of cacheline size.

Signed-off-by: Yuan Kang 
Signed-off-by: Kim Phillips 
Signed-off-by: Herbert Xu

crypto: caam - ahash hmac support

2012-06-27T06:42:05+00:00

caam supports ahash hmac with sha algorithms and md5.

Signed-off-by: Yuan Kang 
Signed-off-by: Kim Phillips 
Signed-off-by: Herbert Xu

crypto: caam - Add support for the Freescale SEC4/CAAM

2011-03-27T02:45:16+00:00

The SEC4 supercedes the SEC2.x/3.x as Freescale's
Integrated Security Engine.  Its programming model is
incompatible with all prior versions of the SEC (talitos).

The SEC4 is also known as the Cryptographic Accelerator
and Assurance Module (CAAM); this driver is named caam.

This initial submission does not include support for Data Path
mode operation - AEAD descriptors are submitted via the job
ring interface, while the Queue Interface (QI) is enabled
for use by others.  Only AEAD algorithms are implemented
at this time, for use with IPsec.

Many thanks to the Freescale STC team for their contributions
to this driver.

Signed-off-by: Steve Cornelius 
Signed-off-by: Kim Phillips 
Signed-off-by: Herbert Xu