linux/drivers/crypto/caam/Kconfig
Horia Geant? 6c3af95593 crypto: caam - add support for LS1021A
LS1021A is a QorIQ SoC having little endian CAAM.

There are a few differences b/w QorIQ and i.MX from CAAM perspective:

1. i.MX platforms are somewhat special wrt. 64-bit registers:
-big endian format at 64-bit level: MSW at address+0 and LSW at address+4
-little endian format at 32-bit level (within MSW and LSW)
and thus need special handling.

2. No CCM (clock controller module) for QorIQ.
No CAAM clocks to enable / disable.

A new Kconfig option - CRYPTO_DEV_FSL_CAAM_LE - is added to indicate
CAAM is little endian (*). It is hidden from the user (to avoid
misconfiguration); when adding support for a new platform with LE CAAM,
either the Kconfig needs to be updated or the corresponding defconfig
needs to indicate that CAAM is LE.
(*) Using a DT property to provide CAAM endianness would not allow
for the ifdeffery.

In order to keep changes to a minimum, the following changes
are postponed:
-endianness fix of the last word in the S/G (rsvd2, bpid, offset),
fields are always 0 anyway;
-S/G format fix for i.MX7 (yes, i.MX7 support was not added yet,
but still...)

Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-08-18 10:30:39 +08:00

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config CRYPTO_DEV_FSL_CAAM
tristate "Freescale CAAM-Multicore driver backend"
depends on FSL_SOC || ARCH_MXC
help
Enables the driver module for Freescale's Cryptographic Accelerator
and Assurance Module (CAAM), also known as the SEC version 4 (SEC4).
This module creates job ring devices, and configures h/w
to operate as a DPAA component automatically, depending
on h/w feature availability.
To compile this driver as a module, choose M here: the module
will be called caam.
config CRYPTO_DEV_FSL_CAAM_JR
tristate "Freescale CAAM Job Ring driver backend"
depends on CRYPTO_DEV_FSL_CAAM
default y
help
Enables the driver module for Job Rings which are part of
Freescale's Cryptographic Accelerator
and Assurance Module (CAAM). This module adds a job ring operation
interface.
To compile this driver as a module, choose M here: the module
will be called caam_jr.
config CRYPTO_DEV_FSL_CAAM_RINGSIZE
int "Job Ring size"
depends on CRYPTO_DEV_FSL_CAAM_JR
range 2 9
default "9"
help
Select size of Job Rings as a power of 2, within the
range 2-9 (ring size 4-512).
Examples:
2 => 4
3 => 8
4 => 16
5 => 32
6 => 64
7 => 128
8 => 256
9 => 512
config CRYPTO_DEV_FSL_CAAM_INTC
bool "Job Ring interrupt coalescing"
depends on CRYPTO_DEV_FSL_CAAM_JR
help
Enable the Job Ring's interrupt coalescing feature.
Note: the driver already provides adequate
interrupt coalescing in software.
config CRYPTO_DEV_FSL_CAAM_INTC_COUNT_THLD
int "Job Ring interrupt coalescing count threshold"
depends on CRYPTO_DEV_FSL_CAAM_INTC
range 1 255
default 255
help
Select number of descriptor completions to queue before
raising an interrupt, in the range 1-255. Note that a selection
of 1 functionally defeats the coalescing feature, and a selection
equal or greater than the job ring size will force timeouts.
config CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD
int "Job Ring interrupt coalescing timer threshold"
depends on CRYPTO_DEV_FSL_CAAM_INTC
range 1 65535
default 2048
help
Select number of bus clocks/64 to timeout in the case that one or
more descriptor completions are queued without reaching the count
threshold. Range is 1-65535.
config CRYPTO_DEV_FSL_CAAM_CRYPTO_API
tristate "Register algorithm implementations with the Crypto API"
depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR
default y
select CRYPTO_AEAD
select CRYPTO_AUTHENC
select CRYPTO_BLKCIPHER
help
Selecting this will offload crypto for users of the
scatterlist crypto API (such as the linux native IPSec
stack) to the SEC4 via job ring.
To compile this as a module, choose M here: the module
will be called caamalg.
config CRYPTO_DEV_FSL_CAAM_AHASH_API
tristate "Register hash algorithm implementations with Crypto API"
depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR
default y
select CRYPTO_HASH
help
Selecting this will offload ahash for users of the
scatterlist crypto API to the SEC4 via job ring.
To compile this as a module, choose M here: the module
will be called caamhash.
config CRYPTO_DEV_FSL_CAAM_RNG_API
tristate "Register caam device for hwrng API"
depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR
default y
select CRYPTO_RNG
select HW_RANDOM
help
Selecting this will register the SEC4 hardware rng to
the hw_random API for suppying the kernel entropy pool.
To compile this as a module, choose M here: the module
will be called caamrng.
config CRYPTO_DEV_FSL_CAAM_IMX
def_bool SOC_IMX6 || SOC_IMX7D
depends on CRYPTO_DEV_FSL_CAAM
config CRYPTO_DEV_FSL_CAAM_LE
def_bool CRYPTO_DEV_FSL_CAAM_IMX || SOC_LS1021A
depends on CRYPTO_DEV_FSL_CAAM
config CRYPTO_DEV_FSL_CAAM_DEBUG
bool "Enable debug output in CAAM driver"
depends on CRYPTO_DEV_FSL_CAAM
help
Selecting this will enable printing of various debug
information in the CAAM driver.