This adds documentation of device tree bindings for the STM32
HASH controller.
Signed-off-by: NLionel Debieve <lionel.debieve@st.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The complete stm32 module is rename as crypto
in order to use generic naming
Signed-off-by: NLionel Debieve <lionel.debieve@st.com>
Reviewed-by: NFabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Use the correct unregister_shashes function to
to remove the registered algo
Signed-off-by: NLionel Debieve <lionel.debieve@st.com>
Reviewed-by: NFabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

In case of arm soc support, readl and writel will
be optimized using relaxed functions
Signed-off-by: NLionel Debieve <lionel.debieve@st.com>
Reviewed-by: NFabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

kill_fq removes a complete frame queue, it needs to free the qman_fq
in the last. Else kmemleak will report the below warning:

unreferenced object 0xffff800073085c80 (size 128):
  comm "cryptomgr_test", pid 199, jiffies 4294937850 (age 67.840s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 a0 80 7e 00 00 80 ff ff
    00 00 00 00 00 00 00 00 04 00 04 00 5c 01 00 00
  backtrace:
    [<ffff8000001e5760>] create_object+0xf8/0x258
    [<ffff800000994e38>] kmemleak_alloc+0x58/0xa0
    [<ffff8000001d5f18>] kmem_cache_alloc_trace+0x2c8/0x358
    [<ffff8000007e8410>] create_caam_req_fq+0x40/0x170
    [<ffff8000007e870c>] caam_drv_ctx_update+0x54/0x248
    [<ffff8000007fca54>] aead_setkey+0x154/0x300
    [<ffff800000452120>] setkey+0x50/0xf0
    [<ffff80000045b144>] __test_aead+0x5ec/0x1028
    [<ffff80000045c28c>] test_aead+0x44/0xc8
    [<ffff80000045c368>] alg_test_aead+0x58/0xd0
    [<ffff80000045bdb4>] alg_test+0x14c/0x308
    [<ffff8000004588e8>] cryptomgr_test+0x50/0x58
    [<ffff8000000c3b2c>] kthread+0xdc/0xf0
    [<ffff800000083c00>] ret_from_fork+0x10/0x50

And check where the function kill_fq() is called to remove
the additional kfree to qman_fq and avoid re-calling the released qman_fq.
Signed-off-by: NXulin Sun <xulin.sun@windriver.com>
Acked-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The updated memory management is described in the top part of the code.
As one benefit of the changed memory management, the AIO and synchronous
operation is now implemented in one common function. The AF_ALG
operation uses the async kernel crypto API interface for each cipher
operation. Thus, the only difference between the AIO and sync operation
types visible from user space is:

1. the callback function to be invoked when the asynchronous operation
   is completed

2. whether to wait for the completion of the kernel crypto API operation
   or not

The change includes the overhaul of the TX and RX SGL handling. The TX
SGL holding the data sent from user space to the kernel is now dynamic
similar to algif_skcipher. This dynamic nature allows a continuous
operation of a thread sending data and a second thread receiving the
data. These threads do not need to synchronize as the kernel processes
as much data from the TX SGL to fill the RX SGL.

The caller reading the data from the kernel defines the amount of data
to be processed. Considering that the interface covers AEAD
authenticating ciphers, the reader must provide the buffer in the
correct size. Thus the reader defines the encryption size.
Signed-off-by: NStephan Mueller <smueller@chronox.de>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The updated memory management is described in the top part of the code.
As one benefit of the changed memory management, the AIO and synchronous
operation is now implemented in one common function. The AF_ALG
operation uses the async kernel crypto API interface for each cipher
operation. Thus, the only difference between the AIO and sync operation
types visible from user space is:

1. the callback function to be invoked when the asynchronous operation
   is completed

2. whether to wait for the completion of the kernel crypto API operation
   or not

In addition, the code structure is adjusted to match the structure of
algif_aead for easier code assessment.

The user space interface changed slightly as follows: the old AIO
operation returned zero upon success and < 0 in case of an error to user
space. As all other AF_ALG interfaces (including the sync skcipher
interface) returned the number of processed bytes upon success and < 0
in case of an error, the new skcipher interface (regardless of AIO or
sync) returns the number of processed bytes in case of success.
Signed-off-by: NStephan Mueller <smueller@chronox.de>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

When a user chooses a rng source via sysfs attribute
this rng should be sticky, even when other sources
with better quality to register. This patch introduces
a simple way to remember the user's choice. This is
reflected by a new sysfs attribute file 'rng_selected'
which shows if the current rng has been chosen by
userspace. The new attribute file shows '1' for user
selected rng and '0' otherwise.
Signed-off-by: NHarald Freudenberger <freude@linux.vnet.ibm.com>
Reviewed-by: NPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch rewoks the hwrng to always use the
rng source with best entropy quality.

On registation and unregistration the hwrng now
tries to choose the best (= highest quality value)
rng source. The handling of the internal list
of registered rng sources is now always sorted
by quality and the top most rng chosen.
Signed-off-by: NHarald Freudenberger <freude@linux.vnet.ibm.com>
Reviewed-by: NPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

SELF condition has no meaning for the SERIAL sharing since the jobs
are executed in the same DECO.
Signed-off-by: NTudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Clean up the code, as indicated by Coccinelle.

Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: NTudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

sg_to_sec4_sg_len() is no longer used since
commit 479bcc7c ("crypto: caam - Convert authenc to new AEAD interface")

Its functionality has been superseded by the usage of sg_nents_for_len()
returning the number of S/G entries corresponding to the provided length.
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Change log level for some prints from dev_info() to dev_dbg(), low-level
details are needed only when debugging.
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

sg_sw_sec4.h header is not used by caam/qi, thus remove its inclusion.
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Since ARM64 commit 1dccb598 ("arm64: simplify dma_get_ops"),
dma_ops no longer default to swiotlb_dma_ops, but to dummy_dma_ops.

dma_ops have to be explicitly set in the driver - at least for ARM64.

Fixes: 67c2315d ("crypto: caam - add Queue Interface (QI) backend support")
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Associated data (AD) length is read by CAAM from an S/G entry
that is initially filled by the GPP.
Accordingly, AD length has to be stored in CAAM endianness.

Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

For more than 16 S/G entries, driver currently corrupts memory
on ARMv8, see below KASAN log.
Note: this does not reproduce on PowerPC due to different (smaller)
cache line size - 64 bytes on PPC vs. 128 bytes on ARMv8.

One such use case is one of the cbc(aes) test vectors - with 8 S/G
entries and src != dst. Driver needs 1 (IV) + 2 x 8 = 17 entries,
which goes over the 16 S/G entries limit:
(CAAM_QI_MEMCACHE_SIZE - offsetof(struct ablkcipher_edesc, sgt)) /
sizeof(struct qm_sg_entry) = 256 / 16 = 16 S/Gs

Fix this by:
-increasing object size in caamqicache pool from 512 to 768; this means
the maximum number of S/G entries grows from (at least) 16 to 32
(again, for ARMv8 case of 128-byte cache line)
-add checks in the driver to fail gracefully (ENOMEM) in case the 32 S/G
entries limit is exceeded

==================================================================
BUG: KASAN: slab-out-of-bounds in ablkcipher_edesc_alloc+0x4ec/0xf60
Write of size 1 at addr ffff800021cb6003 by task cryptomgr_test/1394

CPU: 3 PID: 1394 Comm: cryptomgr_test Not tainted 4.12.0-rc7-next-20170703-00023-g72badbcc1ea7-dirty #26
Hardware name: LS1046A RDB Board (DT)
Call trace:
[<ffff20000808ac6c>] dump_backtrace+0x0/0x290
[<ffff20000808b014>] show_stack+0x14/0x1c
[<ffff200008d62c00>] dump_stack+0xa4/0xc8
[<ffff200008264e40>] print_address_description+0x110/0x26c
[<ffff200008265224>] kasan_report+0x1d0/0x2fc
[<ffff2000082637b8>] __asan_store1+0x4c/0x54
[<ffff200008b4884c>] ablkcipher_edesc_alloc+0x4ec/0xf60
[<ffff200008b49304>] ablkcipher_encrypt+0x44/0xcc
[<ffff20000848a61c>] skcipher_encrypt_ablkcipher+0x120/0x138
[<ffff200008495014>] __test_skcipher+0xaec/0xe30
[<ffff200008497088>] test_skcipher+0x6c/0xd8
[<ffff200008497154>] alg_test_skcipher+0x60/0xe4
[<ffff2000084974c4>] alg_test.part.13+0x130/0x304
[<ffff2000084976d4>] alg_test+0x3c/0x68
[<ffff2000084938ac>] cryptomgr_test+0x54/0x5c
[<ffff20000810276c>] kthread+0x188/0x1c8
[<ffff2000080836c0>] ret_from_fork+0x10/0x50

Allocated by task 1394:
 save_stack_trace_tsk+0x0/0x1ac
 save_stack_trace+0x18/0x20
 kasan_kmalloc.part.5+0x48/0x110
 kasan_kmalloc+0x84/0xa0
 kasan_slab_alloc+0x14/0x1c
 kmem_cache_alloc+0x124/0x1e8
 qi_cache_alloc+0x28/0x58
 ablkcipher_edesc_alloc+0x244/0xf60
 ablkcipher_encrypt+0x44/0xcc
 skcipher_encrypt_ablkcipher+0x120/0x138
 __test_skcipher+0xaec/0xe30
 test_skcipher+0x6c/0xd8
 alg_test_skcipher+0x60/0xe4
 alg_test.part.13+0x130/0x304
 alg_test+0x3c/0x68
 cryptomgr_test+0x54/0x5c
 kthread+0x188/0x1c8
 ret_from_fork+0x10/0x50

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff800021cb5e00
 which belongs to the cache caamqicache of size 512
The buggy address is located 3 bytes to the right of
 512-byte region [ffff800021cb5e00, ffff800021cb6000)
The buggy address belongs to the page:
page:ffff7e0000872d00 count:1 mapcount:0 mapping:          (null)
index:0x0 compound_mapcount: 0
flags: 0xfffc00000008100(slab|head)
raw: 0fffc00000008100 0000000000000000 0000000000000000 0000000180190019
raw: dead000000000100 dead000000000200 ffff800931268200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff800021cb5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff800021cb5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff800021cb6000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff800021cb6080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff800021cb6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

caam/qi needs a fix similar to what was done for caam/jr in
commit "crypto: caam/qi - properly set IV after {en,de}crypt",
to allow for ablkcipher/skcipher chunking/streaming.

Cc: <stable@vger.kernel.org>
Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Suggested-by: NDavid Gstir <david@sigma-star.at>
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

caam/qi driver fails to compile when CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y.
Fix it by making the offending local per_cpu variable global.

Cc: <stable@vger.kernel.org>
Fixes: 67c2315d ("crypto: caam - add Queue Interface (QI) backend support")
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

caam/qi driver does not compile when DEBUG is enabled
(CRYPTO_DEV_FSL_CAAM_DEBUG=y):

drivers/crypto/caam/caamalg_qi.c: In function 'ablkcipher_done':
drivers/crypto/caam/caamalg_qi.c:794:2: error: implicit declaration of function 'dbg_dump_sg' [-Werror=implicit-function-declaration]
  dbg_dump_sg(KERN_ERR, "dst    @" __stringify(__LINE__)": ",

Since dbg_dump_sg() is shared between caam/jr and caam/qi, move it
in a shared location and export it.

At the same time:
-reduce ifdeferry by providing a no-op implementation for !DEBUG case
-rename it to caam_dump_sg() to be consistent in terms of
exported symbols namespace (caam_*)

Cc: <stable@vger.kernel.org>
Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

s/desi/des for echainiv(authenc(hmac(sha256),cbc(des))) alg.

Cc: <stable@vger.kernel.org>
Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: NHoria Geantă <horia.geanta@nxp.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return -ENODEV
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

fixed WARNING: Block comments should align the * on each line
fixed WARNINGs: Missing a blank line after declarations
fixed ERROR: space prohibited before that ',' (ctx:WxE)
Signed-off-by: NChris Gorman <chrisjohgorman@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Since SP device driver supports multiples devices (e.g CCP, PSP), we
should not fail the driver init just because CCP device is not found.
Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

CCP device initializes is now integerated into higher level SP device,
to avoid the confusion lets rename the ccp driver initialization files
(ccp-platform.c->sp-platform.c, ccp-pci.c->sp-pci.c). The patch does not
make any functional changes other than renaming file and structures
Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The CCP and PSP devices part of AMD Secure Procesor may share the same
interrupt. Hence we expand the SP device to register a common interrupt
handler and provide functions to CCP and PSP devices to register their
interrupt callback which will be invoked upon interrupt.
Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The CCP device is part of the AMD Secure Processor. In order to expand
the usage of the AMD Secure Processor, create a framework that allows
functional components of the AMD Secure Processor to be initialized and
handled appropriately.
Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Update pci and platform files to use devres interface to allocate the PCI
and iomap resources. Also add helper functions to consolicate module init,
exit and power mangagement code duplication.
Signed-off-by: NBrijesh Singh <brijesh.singh@amd.com>
Acked-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

A new cryptographic engine driver was added in
drivers/crypto/atmel-ecc.*.
Add myself as a maintainer for this driver.
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Add ECDH support for ATECC508A (I2C) device.

The device features hardware acceleration for the NIST standard
P256 prime curve and supports the complete key life cycle from
private key generation to ECDH key agreement.

Random private key generation is supported internally within
the device to ensure that the private key can never be known
outside of the device. If the user wants to use its own private
keys, the driver will fallback to the ecdh software implementation.
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

These helpers will be used for fallbacks to kpp software
implementations.
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The Security System has a PRNG, this patch adds support for it via
crypto_rng.
Signed-off-by: NCorentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Print and propagate the return value of platform_get_irq on failure.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Propagate the return value of platform_get_irq on failure.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Print error message on platform_get_irq failure before return.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Print and propagate the return value of platform_get_irq on failure.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Propagate the return value of platform_get_irq on failure.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Print error message on platform_get_irq failure before return.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Changes since v2:
  - On failure remove only the DebugFS heirarchy for this device
Changes since v1:
  - Remove unneeded local variable
Signed-off-by: NGary R Hook <gary.hook@amd.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>