crypto: sun8i-ss - remove unnecessary alignmask for ahashes

The crypto API's support for alignmasks for ahash algorithms is nearly
useless, as its only effect is to cause the API to align the key and
result buffers. The drivers that happen to be specifying an alignmask
for ahash rarely actually need it. When they do, it's easily fixable,
especially considering that these buffers cannot be used for DMA.

In preparation for removing alignmask support from ahash, this patch
makes the sun8i-ss driver no longer use it. This driver didn't actually
rely on it; it only writes to the result buffer in sun8i_ss_hash_run(),
simply using memcpy(). And sun8i_ss_hmac_setkey() does not assume any
alignment for the key buffer.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: drivers - Explicitly include correct DT includes

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - Use new crypto_engine_op interface

Use the new crypto_engine_op interface where the callback is stored
in the algorithm object.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: update some Arm documentation references

The Arm documentation has moved to Documentation/arch/arm; update a
set of references under crypto/allwinner to match.

Cc: Corentin Labbe <clabbe.montjoie@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Samuel Holland <samuel@sholland.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

crypto: sun8i-ss - Remove GFP_DMA and add DMA alignment padding

GFP_DMA does not guarantee that the returned memory is aligned
for DMA. In fact for sun8i-ss it is superfluous and can be removed.

However, kmalloc may start returning DMA-unaligned memory in future
so fix this by adding the alignment by hand.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - fix error codes in allocate_flows()

These failure paths should return -ENOMEM. Currently they return
success.

Fixes: 359e893e8af4 ("crypto: sun8i-ss - rework handling of IV")
Fixes: 8eec4563f152 ("crypto: sun8i-ss - do not allocate memory when handling hash requests")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - add hmac(sha1)

Even if sun8i-ss does not handle hmac(sha1) directly, we can provide one
which use the already supported acceleration of sha1.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - rework debugging

The "Fallback for xxx" message is annoying, remove it and store the
information in the debugfs.
In the same time, reports more fallback statistics.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - handle requests if last block is not modulo 64

The current sun8i-ss handle only requests with all SG length being
modulo 64.
But the last SG could be always handled by copying it on the pad buffer.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - do not allocate memory when handling hash requests

Instead of allocate memory on each requests, it is easier to
pre-allocate buffers.
This made error path easier.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - rework handling of IV

sun8i-ss fail handling IVs when doing decryption of multiple SGs in-place.
It should backup the last block of each SG source for using it later as
IVs.
In the same time remove allocation on requests path for storing all
IVs.

Fixes: f08fcced6d00 ("crypto: allwinner - Add sun8i-ss cryptographic offloader")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - really disable hash on A80

When adding hashes support to sun8i-ss, I have added them only on A83T.
But I forgot that 0 is a valid algorithm ID, so hashes are enabled on A80 but
with an incorrect ID.
Anyway, even with correct IDs, hashes do not work on A80 and I cannot
find why.
So let's disable all of them on A80.

Fixes: d9b45418a917 ("crypto: sun8i-ss - support hash algorithms")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - Fix PM reference leak when pm_runtime_get_sync() fails

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Signed-off-by: Shixin Liu <liushixin2@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - fix comparison of integer expressions of different signedness

This patch fixes the warning:
warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - better debug printing

This patch reworks the way debug info are printed.
Instead of printing raw numbers, let's add a bit of context.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - support hash algorithms

The SS support multiples hash algorithms, this patch adds support for
MD5, SHA1, SHA224 and SHA256.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - Add support for the PRNG

This patch had support for the PRNG present in the SS.
The output was tested with rngtest without any failure.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - Add SS_START define

Instead of using an hardcoded value, let's use a defined value for
SS_START.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: allwinner - Convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i - Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and the error value gets printed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: drivers - set the flag CRYPTO_ALG_ALLOCATES_MEMORY

Set the flag CRYPTO_ALG_ALLOCATES_MEMORY in the crypto drivers that
allocate memory.

drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c: sun8i_ce_cipher
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c: sun8i_ss_cipher
drivers/crypto/amlogic/amlogic-gxl-core.c: meson_cipher
drivers/crypto/axis/artpec6_crypto.c: artpec6_crypto_common_init
drivers/crypto/bcm/cipher.c: spu_skcipher_rx_sg_create
drivers/crypto/caam/caamalg.c: aead_edesc_alloc
drivers/crypto/caam/caamalg_qi.c: aead_edesc_alloc
drivers/crypto/caam/caamalg_qi2.c: aead_edesc_alloc
drivers/crypto/caam/caamhash.c: hash_digest_key
drivers/crypto/cavium/cpt/cptvf_algs.c: process_request
drivers/crypto/cavium/nitrox/nitrox_aead.c: nitrox_process_se_request
drivers/crypto/cavium/nitrox/nitrox_skcipher.c: nitrox_process_se_request
drivers/crypto/ccp/ccp-crypto-aes-cmac.c: ccp_do_cmac_update
drivers/crypto/ccp/ccp-crypto-aes-galois.c: ccp_crypto_enqueue_request
drivers/crypto/ccp/ccp-crypto-aes-xts.c: ccp_crypto_enqueue_request
drivers/crypto/ccp/ccp-crypto-aes.c: ccp_crypto_enqueue_request
drivers/crypto/ccp/ccp-crypto-des3.c: ccp_crypto_enqueue_request
drivers/crypto/ccp/ccp-crypto-sha.c: ccp_crypto_enqueue_request
drivers/crypto/chelsio/chcr_algo.c: create_cipher_wr
drivers/crypto/hisilicon/sec/sec_algs.c: sec_alloc_and_fill_hw_sgl
drivers/crypto/hisilicon/sec2/sec_crypto.c: sec_alloc_req_id
drivers/crypto/inside-secure/safexcel_cipher.c: safexcel_queue_req
drivers/crypto/inside-secure/safexcel_hash.c: safexcel_ahash_enqueue
drivers/crypto/ixp4xx_crypto.c: ablk_perform
drivers/crypto/marvell/cesa/cipher.c: mv_cesa_skcipher_dma_req_init
drivers/crypto/marvell/cesa/hash.c: mv_cesa_ahash_dma_req_init
drivers/crypto/marvell/octeontx/otx_cptvf_algs.c: create_ctx_hdr
drivers/crypto/n2_core.c: n2_compute_chunks
drivers/crypto/picoxcell_crypto.c: spacc_sg_to_ddt
drivers/crypto/qat/qat_common/qat_algs.c: qat_alg_skcipher_encrypt
drivers/crypto/qce/skcipher.c: qce_skcipher_async_req_handle
drivers/crypto/talitos.c : talitos_edesc_alloc
drivers/crypto/virtio/virtio_crypto_algs.c: __virtio_crypto_skcipher_do_req
drivers/crypto/xilinx/zynqmp-aes-gcm.c: zynqmp_aes_aead_cipher

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
[EB: avoid overly-long lines]
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

docs: fix broken references for ReST files that moved around

Some broken references happened due to shifting files around
and ReST renames. Those can't be auto-fixed by the script,
so let's fix them manually.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Link: https://lore.kernel.org/r/64773a12b4410aaf3e3be89e3ec7e34de2484eea.1586881715.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

crypto: sun8i-ss - Delete an error message in sun8i_ss_probe()

The function “platform_get_irq” can log an error already.
Thus omit a redundant message for the exception handling in the
calling function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - fix removal of module

Removing the driver cause an oops due to the fact we clean an extra
channel.
Let's give the right index to the cleaning function.
Fixes: f08fcced6d00 ("crypto: allwinner - Add sun8i-ss cryptographic offloader")

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: allwinner - fix some spelling mistakes

There are spelling mistakes in dev_warn and dev_err messages. Fix these.
Change "recommandation" to "recommendation" and "tryed" to "tried".

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sun8i-ss - fix semicolon.cocci warnings

Generated by: scripts/coccinelle/misc/semicolon.cocci

Fixes: f08fcced6d00 ("crypto: allwinner - Add sun8i-ss cryptographic offloader")
CC: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: allwinner - Add sun8i-ss cryptographic offloader

The Security System is an hardware cryptographic offloader present
on Allwinner SoCs A80 and A83T.
It is different from the previous sun4i-ss.

This driver supports AES cipher in CBC and ECB mode.

Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>