Messages in this thread |  | | Date | Wed, 6 Feb 2013 19:33:15 -0600 | From | Kim Phillips <> | Subject | Re: [PATCH] crypto: caam - set RDB bit in security configuration register |
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On Wed, 6 Feb 2013 17:17:46 +0530 Vakul Garg <vakul@freescale.com> wrote:
> This change is required for post SEC-5.0 devices which have RNG4. Setting RDB
wrap your commit message text to 75 chars
> 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.
Linux kernel IPSec or another IPSEC stack? how much lower?
> + if (of_device_is_compatible(nprop, "fsl,sec-v5.0")) > + setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE); > +
this belongs further down - at the end of the RNG4 initialization section.
Kim
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