This patch adds crypto_requires_off which is an extension of crypto_requires_sync for similar bits such as NEED_FALLBACK. Cc: stable@vger.kernel.org #4.10 Suggested-by: Marcelo Cerri <marcelo.cerri@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Instead of unconditionally forcing 4 byte alignment for all generic chaining modes that rely on crypto_xor() or crypto_inc() (which may result in unnecessary copying of data when the underlying hardware can perform unaligned accesses efficiently), make those functions deal with unaligned input explicitly, but only if the Kconfig symbol HAVE_EFFICIENT_UNALIGNED_ACCESS is set. This will allow us to drop the alignmasks from the CBC, CMAC, CTR, CTS, PCBC and SEQIV drivers. For crypto_inc(), this simply involves making the 4-byte stride conditional on HAVE_EFFICIENT_UNALIGNED_ACCESS being set, given that it typically operates on 16 byte buffers. For crypto_xor(), an algorithm is implemented that simply runs through the input using the largest strides possible if unaligned accesses are allowed. If they are not, an optimal sequence of memory accesses is emitted that takes the relative alignment of the input buffers into account, e.g., if the relative misalignment of dst and src is 4 bytes, the entire xor operation will be completed using 4 byte loads and stores (modulo unaligned bits at the start and end). Note that all expressions involving misalign are simply eliminated by the compiler when HAVE_EFFICIENT_UNALIGNED_ACCESS is defined. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch move the whole crypto engine API to its own header crypto/engine.h. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
When hard preemption is enabled there is no need to explicitly call crypto_yield. This patch eliminates it if that is the case. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch adds the helper crypto_inst_setname because the current helper crypto_alloc_instance2 is no longer useful given that we now look up the algorithm after we allocate the instance object. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch removes all traces of the crypto_hash interface, now that everyone has switched over to shash or ahash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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 patch introduces crypto_queue_len() helper function to help to get the queue length in the crypto queue list now. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Currently the task of freeing an instance is given to the crypto template. However, it has no type information on the instance so we have to resort to checking type information at runtime. This patch introduces a free function to crypto_type that will be used to free an instance. This can then be used to free an instance in a type-safe manner. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The function __crypto_dequeue_request is completely unused. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>