diff options
| author |   Vakul Garg <vakul@freescale.com> | 2013-03-12 13:55:21 +0530 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2013-03-22 18:13:54 +0800 |
| commit | 575c1bd549ff6bc097b3669b086e54e01169379f (patch) | |
| tree | 79f614dd0c7d6c62140cd199352ac37222ac8ffb /drivers/crypto/caam/ctrl.c | |
| parent | hwrng: exynos - add CONFIG_PM_SLEEP/CONFIG_PM_RUNTIME to suspend/resume (diff) | |
| download | linux-dev-575c1bd549ff6bc097b3669b086e54e01169379f.tar.xz linux-dev-575c1bd549ff6bc097b3669b086e54e01169379f.zip | |
crypto: caam - set RDB bit in security configuration register
This change is required for post SEC-5.0 devices which have RNG4.
Setting RDB in security configuration register allows CAAM to use the
"Random Data Buffer" to be filled by a single request. The Random Data
Buffer is large enough for ten packets to get their IVs from a single
request. If the Random Data Buffer is not enabled, then each IV causes a
separate request, and RNG4 hardware cannot keep up resulting in lower
IPSEC throughput if random IVs are used.
Signed-off-by: Vakul Garg <vakul@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam/ctrl.c')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 1c56f63524f2..19faea2c31d1 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -304,6 +304,9 @@ static int caam_probe(struct platform_device *pdev) caam_remove(pdev); return ret; } + + /* Enable RDB bit so that RNG works faster */ + setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE); } /* NOTE: RTIC detection ought to go here, around Si time */ |