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path: root/drivers/crypto/omap-sham.c
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* crypto: Add CRYPTO_ALG_KERN_DRIVER_ONLY flagNikos Mavrogiannopoulos2012-01-13
| | | | | | | | | | The added CRYPTO_ALG_KERN_DRIVER_ONLY indicates whether a cipher is only available via a kernel driver. If the cipher implementation might be available by using an instruction set or by porting the kernel code, then it must not be set. Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - do not schedule tasklet if there is no active requestsDmitry Kasatkin2011-06-29
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - clear device flags when finishing requestDmitry Kasatkin2011-06-29
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - irq handler must not clear error codeDmitry Kasatkin2011-06-29
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - irq and dma handling changesDmitry Kasatkin2011-06-29
| | | | | | | | | | | | It could be a situation, that tasklet is executed twice because of certain delay between dma callback and irq handler execution. In that case, second tasklet execution could actually corrupt the data of the new started dma transactions. This patch improves tasklet logic and prevents above described cases. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - remove dedicated queue handling taskletDmitry Kasatkin2011-06-29
| | | | | | | | | | | | Calling omap_sham_handle_queue from "done" tasklet should be done after irq scheduled tasklet completes. Having additional tasklet does not solve that issue because it might be execute before. So queue handling tasklet has been removed and functionality integrated into single tasklet. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - remove unnecessary local variableDmitry Kasatkin2011-06-29
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - move some flags to device contextDmitry Kasatkin2011-06-29
| | | | | | | | | Couple of context flags have been moved to device flags. IRQ and tasklet handlers does not need to access request context anymore. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - replace flags operation with atomic bit operationsDmitry Kasatkin2011-06-29
| | | | | | | | | | Some flags are changed in interrupt handlers and verified in the tasklet. There might be a race condition when tasklet is interrupted or another cpu/core will run IRQ handler and tasklet in parallel. Atomic bitops functions are now used instead of bitmask operations. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - replace flags bit mask with bit numberDmitry Kasatkin2011-06-29
| | | | | | | | | Flags mask cannot be used with atomic bit operations. This patch changes masks to bit numbers. Atomic bit operations will be used by following patches. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - remove unused codeDmitry Kasatkin2011-06-29
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - remove extra referenceDmitry Kasatkin2011-06-29
| | | | | | | Request pointer is already available in the function. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - hmac calculation bug fix for sha1 base hashDmitry Kasatkin2011-04-26
| | | | | | | | | | | | | | | | | | | | | This patch fixes 2 hmac inter-dependent bugs. 1. "omap-sham: hash-in-progress is stored in hw format" commit introduced optimization where temporary hash had been stored in OMAP specific format (big endian). For SHA1 it is different to real hash format, which is little endian. Final HMAC value was calculated using incorrect hash. Because CONFIG_CRYPTO_MANAGER_TESTS was disabled this error remained unnoticed. After enabling this option, bug has been found. 2. HMAC was calculated using temporrary hash value. For a single-request updates, temporary hash was the final one and HMAC result was correct. But in fact only the final hash had to be used. All crypto tests for HMAC produces only single request and could not catch the problem. This problem is fixed here. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - enable driver for EMU chipsDmitry Kasatkin2011-04-26
| | | | | | | EMU chips also have crypto HW as HS chips. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - remove debug printDmitry Kasatkin2011-04-26
| | | | | Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - fix concurrent sha1 calculationsMarkku Kylanpaa2011-04-26
| | | | | | | | SHA1 accelerator can also be busy. Add -EBUSY status return option and return busy status from omap_sham_finup(). Signed-off-by: Markku Kylanpaa <ext-markku.kylanpaa@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - don't treat NULL clk as an errorJamie Iles2011-01-29
| | | | | | | | | | | 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: Jamie Iles <jamie@jamieiles.com> Reviewed-by: Aaro Koskinen <aaro.koskinen@nokia.com> Reviewed-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - backlog handling fixDmitry Kasatkin2010-12-29
| | | | | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - zero-copy scatterlist handlingDmitry Kasatkin2010-11-27
| | | | | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - FLAGS_FIRST is redundant and removedDmitry Kasatkin2010-11-27
| | | | | | | | bufcnt is 0 if it was no update requests before, which is exact meaning of FLAGS_FIRST. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - hash-in-progress is stored in hw formatDmitry Kasatkin2010-11-27
| | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - crypto_ahash_final() now not need to be called.Dmitry Kasatkin2010-11-27
| | | | | | | | | | | | | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - removed redundunt lockingDmitry Kasatkin2010-11-27
| | | | | | | | Locking for queuing and dequeuing is combined. test_and_set_bit() is also replaced with checking under dd->lock. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - error handling improvedDmitry Kasatkin2010-11-27
| | | | | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - DMA initialization fixes for off modeDmitry Kasatkin2010-11-27
| | | | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - uses digest buffer in request contextDmitry Kasatkin2010-11-27
| | | | | | | | | | 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: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap-sham - Adjust DMA parametersSamu Onkalo2010-09-03
| | | | | | | | | | | | | | | | | 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: Samu Onkalo <samu.p.onkalo@nokia.com> Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap - remove unused #include <linux/version.h>Huang Weiyi2010-05-25
| | | | | | | | Remove unused #include <linux/version.h>('s) in drivers/crypto/omap-sham.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: omap - sha1 & md5 driverDmitry Kasatkin2010-05-02
Earlier kernel contained omap sha1 and md5 driver, which was not maintained, was not ported to new crypto APIs and removed from the source tree. - implements async crypto API using dma and cpu. - supports multiple sham instances if available - hmac - concurrent requests Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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