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path: root/drivers/crypto/omap-aes.c
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2019-11-17crypto: omap - switch to skcipher APIArd Biesheuvel
Commit 7a7ffe65c8c5 ("crypto: skcipher - Add top-level skcipher interface") dated 20 august 2015 introduced the new skcipher API which is supposed to replace both blkcipher and ablkcipher. While all consumers of the API have been converted long ago, some producers of the ablkcipher remain, forcing us to keep the ablkcipher support routines alive, along with the matching code to expose [a]blkciphers via the skcipher API. So switch this driver to the skcipher API, allowing us to finally drop the ablkcipher code in the near future. Cc: Tony Lindgren <tony@atomide.com> Cc: linux-omap@vger.kernel.org Reviewed-by: Tero Kristo <t-kristo@ti.com> Tested-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-08-09crypto: drivers - Remove dev_err() usage after platform_get_irq()Stephen Boyd
We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: <linux-crypto@vger.kernel.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-23crypto: skcipher - remove remnants of internal IV generatorsEric Biggers
Remove dead code related to internal IV generators, which are no longer used since they've been replaced with the "seqiv" and "echainiv" templates. The removed code includes: - The "givcipher" (GIVCIPHER) algorithm type. No algorithms are registered with this type anymore, so it's unneeded. - The "const char *geniv" member of aead_alg, ablkcipher_alg, and blkcipher_alg. A few algorithms still set this, but it isn't used anymore except to show via /proc/crypto and CRYPTO_MSG_GETALG. Just hardcode "<default>" or "<none>" in those cases. - The 'skcipher_givcrypt_request' structure, which is never used. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-11-20crypto: remove useless initializations of cra_listEric Biggers
Some algorithms initialize their .cra_list prior to registration. But this is unnecessary since crypto_register_alg() will overwrite .cra_list when adding the algorithm to the 'crypto_alg_list'. Apparently the useless assignment has just been copy+pasted around. So, remove the useless assignments. Exception: paes_s390.c uses cra_list to check whether the algorithm is registered or not, so I left that as-is for now. This patch shouldn't change any actual behavior. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-09-28crypto: omap-aes - Remove VLA usage of skcipherKees Cook
In the quest to remove all stack VLA usage from the kernel[1], this replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(), which uses a fixed stack size. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-03-09crypto: omap-aes - make queue length configurableTero Kristo
Crypto driver queue size can now be configured from userspace. This allows optimizing the queue usage based on use case. Default queue size is still 10 entries. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-03-09crypto: omap-aes - make fallback size configurableTero Kristo
Crypto driver fallback size can now be configured from userspace. This allows optimizing the DMA usage based on use case. Detault fallback size of 200 is still used. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-02-15crypto: omap - convert to new crypto engine APICorentin LABBE
This patch convert the driver to the new crypto engine API. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-07crypto: omap - use of_device_get_match_dataCorentin LABBE
The usage of of_device_get_match_data reduce the code size a bit. Furthermore, it prevents an improbable dereference when of_match_device() return NULL. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-09-22crypto: omap - Use GCM IV size constantCorentin LABBE
This patch replace GCM IV size value by their constant name. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-07-18crypto: omap-aes - fix error return code in omap_aes_probe()Gustavo A. R. Silva
Propagate the return value of platform_get_irq on failure. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - Add support for GCM modeTero Kristo
OMAP AES hw supports AES-GCM mode. This patch adds support for GCM and RFC4106 GCM mode in omap-aes driver. The GCM implementation is mostly written into its own source file, which gets built into the same driver binary as the existing AES support. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [t-kristo@ti.com: forward port to latest upstream kernel, conversion to use omap-crypto lib and some additional fixes] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - export some AES driver functionality locallyTero Kristo
These are going to be required by the addition of the GCM support. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - move definitions over to a separate header fileTero Kristo
Move over most of the omap-aes driver internal definitions to a separate header file. This is done so that the same definitions can be used in the upcoming AES-GCM support code. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - use base omap crypto support libraryTero Kristo
Use the SG alignment APIs from the OMAP crypto support library instead of using own implementations. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - fix context handling for multiple coresTero Kristo
AES can have multiple HW accelerator cores in the system, in which case each core has its own crypto engine in use. Currently, the used hardware device is stored under the omap_aes_ctx struct, which is global for the algorithm itself, causing conflicts when used with multiple cores. Fix this by moving the used HW device under reqctx, which is stored per-request basis. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-06-10crypto: omap-aes - drop unused flags attribute from omap_aes_ctxTero Kristo
This is not used for anything, so drop it. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-22crypto: omap-aes - fix error return code in omap_aes_probe()Wei Yongjun
Fix to return error code -ENOMEM from the crypto_engine_alloc_init() error handling case instead of 0, as done elsewhere in this function. Fixes: 0529900a01cb ("crypto: omap-aes - Support crypto engine framework") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-13crypto: omap-aes - fix crypto engine initialization orderTero Kristo
The crypto engine must be initialized before registering algorithms, otherwise the test manager will crash as it attempts to execute tests for the algos while they are being registered. Fixes: 0529900a01cb ("crypto: omap-aes - Support crypto engine framework") Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-13crypto: omap-aes - Add fallback supportLokesh Vutla
As setting up the DMA operations is quite costly, add software fallback support for requests smaller than 200 bytes. This change gives some 10% extra performance in ipsec use case. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [t-kristo@ti.com: udpated against latest upstream, to use skcipher mainly] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-13crypto: omap-aes - Add support for multiple coresLokesh Vutla
Some SoCs like omap4/omap5/dra7 contain multiple AES crypto accelerator cores. Adapt the driver to support this. The driver picks the last used device from a list of AES devices. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [t-kristo@ti.com: forward ported to 4.7 kernel] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-13crypto: omap-aes - use runtime_pm autosuspend for clock handlingTero Kristo
Calling runtime PM API at the cra_init/exit is bad for power management purposes, as the lifetime for a CRA can be very long. Instead, use pm_runtime autosuspend approach for handling the device clocks. Clocks are enabled when they are actually required, and autosuspend disables these if they have not been used for a sufficiently long time period. By default, the timeout value is 1 second. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-07crypto: engine - permit to enqueue ashash_requestCorentin LABBE
The current crypto engine allow only ablkcipher_request to be enqueued. Thus denying any use of it for hardware that also handle hash algo. This patch modify the API for allowing to enqueue ciphers and hash. Since omap-aes/omap-des are the only users, this patch also convert them to the new cryptoengine API. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-07crypto: engine - move crypto engine to its own headerCorentin LABBE
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>
2016-07-18crypto: omap - Stop using crypto scatterwalk_bytes_sglenHerbert Xu
We already have a generic function sg_nents_for_len which does the same thing. This patch switches omap over to it and also adds error handling in case the SG list is short. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-06-24crypto: omap - do not call dmaengine_terminate_allLokesh Vutla
The extra call to dmaengine_terminate_all is not needed, as the DMA is not running at this point. This improves performance slightly. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-06-07crypto: omap-aes - Fix registration of algorithmsLokesh Vutla
Algorithms can be registered only once. So skip registration of algorithms if already registered (i.e. in case we have two AES cores in the system.) Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-05-03crypto: omap-aes - Use dma_request_chan() for requesting DMA channelPeter Ujfalusi
With the new dma_request_chan() the client driver does not need to look for the DMA resource and it does not need to pass filter_fn anymore. By switching to the new API the driver can now support deferred probing against DMA. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> CC: Herbert Xu <herbert@gondor.apana.org.au> CC: David S. Miller <davem@davemloft.net> CC: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-02-01crypto: omap-aes - Support crypto engine frameworkBaolin Wang
Integrate with the newly added crypto engine to make the crypto hardware engine underutilized as each block needs to be processed before the crypto hardware can start working on the next block. The requests from dm-crypt will be listed into engine queue and processed by engine automatically, so remove the 'queue' and 'queue_task' things in omap aes driver. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-12-17crypto: omap - Removed unused variable "err"Rahul Pathak
Removed unused variable "err" and directly return "0" Reported by coccicheck - ./drivers/crypto/omap-aes.c:542:5-8: Unneeded variable: "err". Return "0" on line 551 ./drivers/crypto/omap-des.c:530:5-8: Unneeded variable: "err". Return "0" on line 539 Signed-off-by: Rahul Pathak <rpathak@visteon.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-08crypto: omap-aes - Use BIT() macroVutla, Lokesh
Use BIT()/GENMASK() macros for all register definitions instead of hand-writing bit masks. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-08crypto: omap-aes - Fix configuring of AES modeVutla, Lokesh
AES_CTRL_REG is used to configure AES mode. Before configuring any mode we need to make sure all other modes are reset or else driver will misbehave. So mask all modes before configuring any AES mode. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-08crypto: omap-aes - Increase priority of hw acceleratorVutla, Lokesh
Increasing the priority of omap-aes hw algos, in order to take precedence over sw algos. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-07-08crypto: omap-aes - Fix CTR modeVutla, Lokesh
Algo self tests are failing for CTR mode with omap-aes driver, giving the following error: [ 150.053644] omap_aes_crypt: request size is not exact amount of AES blocks [ 150.061262] alg: skcipher: encryption failed on test 5 for ctr-aes-omap: ret=22 This is because the input length is not aligned with AES_BLOCK_SIZE. Adding support for omap-aes driver for inputs with length not aligned with AES_BLOCK_SIZE. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-04-01crypto: omap-aes - Fix support for unequal lengthsVutla, Lokesh
For cases where total length of an input SGs is not same as length of the input data for encryption, omap-aes driver crashes. This happens in the case when IPsec is trying to use omap-aes driver. To avoid this, we copy all the pages from the input SG list into a contiguous buffer and prepare a single element SG list for this buffer with length as the total bytes to crypt, which is similar thing that is done in case of unaligned lengths. Fixes: 6242332ff2f3 ("crypto: omap-aes - Add support for cases of unaligned lengths") Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-01-26crypto: replace scatterwalk_sg_next with sg_nextCristian Stoica
Modify crypto drivers to use the generic SG helper since both of them are equivalent and the one from crypto is redundant. See also: 468577abe37ff7b453a9ac613e0ea155349203ae reverted in b2ab4a57b018aafbba35bff088218f5cc3d2142e Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-10-20crypto: drop owner assignment from platform_driversWolfram Sang
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-03-10crypto: omap-aes - Use SIMPLE_DEV_PM_OPS macroJingoo Han
Use SIMPLE_DEV_PM_OPS macro in order to make the code simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Nishanth Menon <nm@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-12-05crypto: omap-aes - add error check for pm_runtime_get_syncNishanth Menon
The AES driver currently assumes that pm_runtime_get_sync will always succeed, which may not always be true, so add error handling for the same. This scenario was reported in the following bug: place. https://bugzilla.kernel.org/show_bug.cgi?id=66441 Reported-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-10-30crypto: omap-aes - Fix CTR mode counter lengthJoel Fernandes
NIST vectors for CTR mode in testmgr.h assume the entire IV as the counter. To get correct results that match the output of these vectors, we need to set the counter length correctly. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-09-24crypto: omap-aes - Staticize local symbolsSachin Kamat
Local symbols used only in this file are made static. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Cc: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Convert request_irq to devm_request_irqJoel Fernandes
Keeps request_irq exit/error code paths simpler. Suggested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Convert kzalloc to devm_kzallocJoel Fernandes
Use devm_kzalloc instead of kzalloc. With this change, there is no need to call kfree in error/exit paths. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Add support for cases of unaligned lengthsJoel Fernandes
For cases where offset/length of on any page of the input SG is not aligned by AES_BLOCK_SIZE, we copy all the pages from the input SG list into a contiguous buffer and prepare a single element SG list for this buffer with length as the total bytes to crypt. This is requried for cases such as when an SG list of 16 bytes total size contains 16 pages each containing 1 byte. DMA using the direct buffers of such instances is not possible. For this purpose, we first detect if the unaligned case and accordingly allocate enough number of pages to satisfy the request and prepare SG lists. We then copy data into the buffer, and copy data out of it on completion. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Switch to PIO mode during probeJoel Fernandes
In cases where requesting for DMA channels fails for some reason, or channel numbers are not provided in DT or platform data, we switch to PIO-only mode also checking if platform provides IRQ numbers and interrupt register offsets in DT and platform data. All dma-only paths are avoided in this mode. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - PIO mode: platform data for OMAP4/AM437x and triggerJoel Fernandes
We initialize the scatter gather walk lists needed for PIO mode and avoid all DMA paths such as mapping/unmapping buffers by checking for the pio_only flag. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - PIO mode: Add IRQ handler and walk SGsJoel Fernandes
We add an IRQ handler that implements a state-machine for PIO-mode and data structures for walking the scatter-gather list. The IRQ handler is called in succession both when data is available to read or next data can be sent for processing. This process continues till the entire in/out SG lists have been walked. Once the SG-list has been completely walked, the IRQ handler schedules the done_task tasklet. Also add a useful macro that is used through out the IRQ code for a common pattern of calculating how much an SG list has been walked. This improves code readability and avoids checkpatch errors. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Add IRQ info and helper macrosJoel Fernandes
Add IRQ information to pdata and helper macros. These are required for PIO-mode support. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-08-21crypto: omap-aes - Remove previously used intermediate buffersJoel Fernandes
Intermdiate buffers were allocated, mapped and used for DMA. These are no longer required as we use the SGs from crypto layer directly in previous commits in the series. Also along with it, remove the logic for copying SGs etc as they are no longer used, and all the associated variables in omap_aes_device. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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