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: NSteve Cornelius <sec@pobox.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Final step to eliminate of_platform_bus_type.  They're all just
platform drivers now.

v2: fix type in pasemi_nand.c (thanks to Stephen Rothwell)
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Get rid of old users of of_platform_driver in arch/sparc.  Most
of_platform_driver users can be converted to use the platform_bus
directly.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Get rid of old users of of_platform_driver in arch/powerpc.  Most
of_platform_driver users can be converted to use the platform_bus
directly.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Picochip picoXcell devices have two crypto engines, one targeted
at IPSEC offload and the other at WCDMA layer 2 ciphering.
Signed-off-by: NJamie Iles <jamie@jamieiles.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.
Signed-off-by: NJamie Iles <jamie@jamieiles.com>
Reviewed-by: NAaro Koskinen <aaro.koskinen@nokia.com>
Reviewed-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.
Signed-off-by: NJamie Iles <jamie@jamieiles.com>
Reviewed-and-tested-by: NTobias Karnat <tobias.karnat@googlemail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch moves padlock.h from drivers/crypto into include/crypto
so that it may be used by the via-rng driver.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

fixes fedora sparc build failure, thanks to kylem for helping with debugging
Signed-off-by: NDennis Gilmore <dgilmore@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>  
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Fix a PTR_ERR() return of the wrong pointer
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Previous commit "removed redundant locking" introduced
a bug in handling backlog.
In certain cases, when async request complete callback will
call complete() on -EINPROGRESS code, it will cause uncompleted requests.
It does not happen in implementation similar to crypto test manager,
but it will happen in implementation similar to dm-crypt.
Backlog needs to be checked before dequeuing next request.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

AES module was initialized for every DMA transaction.
That is redundant.
Now it is initialized once per request.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Key and IV should always be set before AES operation.
So no need to check if it has changed or not.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Previous version had not error handling.
Request could remain uncompleted.

Also in the case of DMA error, FLAGS_INIT is unset
and accelerator will be initialized again.

Buffer size allignment is checked.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Submitting request involved double locking for enqueuing and
dequeuing. Now it is done under the same lock.

FLAGS_BUSY is now handled under the same lock.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

DMA parameters for constant data were initialized during driver probe().
It seems that those settings sometimes are lost when devices goes to off mode.
This patch makes DMA initialization just before use.
It solves off mode problems.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

If scatterlist have more than one entry, current driver uses
aligned buffer to copy data to to accelerator to tackle possible
issues with DMA and SHA buffer alignment.

This commit adds more intelligence to verify SG alignment and
possibility to use DMA directly on the data without using copy
buffer.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

bufcnt is 0 if it was no update requests before,
which is exact meaning of FLAGS_FIRST.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Hash-in-progress is now stored in hw format.
Only on final call, hash is converted to correct format.
Speedup copy procedure and will allow to use OMAP burst mode.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

According to the Herbert Xu, client may not always call
crypto_ahash_final().

In the case of error in hash calculation resources will be
automatically cleaned up.

But if no hash calculation error happens and client will not call
crypto_ahash_final() at all, then internal buffer will not be freed,
and clocks will not be disabled.

This patch provides support for atomic crypto_ahash_update() call.
Clocks are now enabled and disabled per update request.

Data buffer is now allocated as a part of request context.
Client is obligated to free it with crypto_free_ahash().
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Locking for queuing and dequeuing is combined.
test_and_set_bit() is also replaced with checking under dd->lock.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Introduces DMA error handling.

DMA error is returned as a result code of the hash request.
Clients needs to handle error codes and may repeat hash calculation attempt.

Also in the case of DMA error, SHAM module is set to be re-initialized again.
It significantly improves stability against possible HW failures.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

DMA parameters for constant data were initialized during driver probe().
It seems that those settings sometimes are lost when devices goes to off mode.
This patch makes DMA initialization just before use.
It solves off mode problems.

Fixes: NB#202786 - Aegis & SHA1 block off mode changes
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Currently driver storred digest results in req->results
provided by the client. But some clients do not set it
until final() call. It leads to crash.
Changed to use internal buffer to store temporary digest results.
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

On certain VIA chipsets AES-CBC requires the input/output to be
a multiple of 64 bytes.  We had a workaround for this but it was
buggy as it sent the whole input for processing when it is meant
to only send the initial number of blocks which makes the rest
a multiple of 64 bytes.

As expected this causes memory corruption whenever the workaround
kicks in.
Reported-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Use the new {max,min}3 macros to save some cycles and bytes on the stack.
This patch substitutes trivial nested macros with their counterpart.
Signed-off-by: NHagen Paul Pfeifer <hagen@jauu.net>
Cc: Joe Perches <joe@perches.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Looks like a copy-and-paste problem to me.
Signed-off-by: NNicolas Kaiser <nikai@nikai.net>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Changed <module>-objs to <module>-y in Makefile.
Signed-off-by: NTracey Dent <tdent48227@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Make hifn_795x::hifn_remove() call cancel_delayed_work_sync() instead
of calling cancel_delayed_work() followed by flush_scheduled_work().

This is to prepare for the deprecation and removal of
flush_scheduled_work().
Signed-off-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

WARNING: kfree(NULL) is safe this check is probably not required
+		if (priv->chan[i].fifo)
+			kfree(priv->chan[i].fifo);
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/talitos.c: In function 'talitos_probe':
drivers/crypto/talitos.c:2363: warning: 'alg' may be used uninitialized in this function
drivers/crypto/talitos.c:2363: note: 'alg' was declared here
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Reported-by: NDennis Gilmore <dennis@ausil.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

DMA is set to use burst mode also for source channel. It should
descrease memory bandwidth needs.

DMA synchronization is set to use prefetch mechanism. SHAM block is behind
L4 bus and it doesn't have fifo. SHAM block is stalling as long as the new
data is available. It takes time to fetch data from memory and transfer it
via L4 bus. With prefetch enabled, data is waiting in DMA fifo and SHAM block
receives new data block faster.
This increases SHA processing speed up to 30 percent depending on the
bus / memory load.
Signed-off-by: NSamu Onkalo <samu.p.onkalo@nokia.com>
Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: NDmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

warning: (ZCRYPT && CRYPTO && CRYPTO_HW && S390 && ZCRYPT=y) selects
ZCRYPT_MONOLITHIC which has unmet direct dependencies (ZCRYPT=m)

ZCRYPT_MONOLITHIC should not depend on ZCRYPT="m" when it gets
selected if ZCRYPT="y".
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Commit id 1636f8ac (sparc/of: Move
of_device fields into struct pdev_archdata) missed fixing up the
n2_core.c and greth.c drivers.  This patch makes the required changes.
Reported-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

of_device is just an alias for platform_device, so remove it entirely.  Also
replace to_of_device() with to_platform_device() and update comment blocks.

This patch was initially generated from the following semantic patch, and then
edited by hand to pick up the bits that coccinelle didn't catch.

@@
@@
-struct of_device
+struct platform_device
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Reviewed-by: NDavid S. Miller <davem@davemloft.net>

Both of_bus_type and of_platform_bus_type are just #define aliases
for the platform bus.  This patch removes all references to them and
switches to the of_register_platform_driver()/of_unregister_platform_driver()
API for registering.

Subsequent patches will convert each user of of_register_platform_driver()
into plain platform_drivers without the of_platform_driver shim.  At which
point the of_register_platform_driver()/of_unregister_platform_driver()
functions can be removed.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NDavid S. Miller <davem@davemloft.net>