linux-kernel - [PATCH] Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE

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Message-ID: <482C953A.4080205@garzik.org>
Date:	Thu, 15 May 2008 15:55:38 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Chris Peterson <cpeterso@...terso.com>,
	tpmdd-devel@...ts.sourceforge.net, tpm@...horst.net,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH] Re: [PATCH] drivers/net: remove network drivers' last few
 uses of IRQF_SAMPLE_RANDOM

Jeff Garzik wrote:
> Someone (hi Jesse?) should implement support for TPM_GetRandom.

Here's an example patch (compile-tested only) to get people started.

This function calls the TPM command, and returns TPM header + RNG data 
in the supplied buffer.

A hw_random driver for TPM still needs to (a) parse the TPM header for 
return code, (b) extract RNG bytes out at offset 14, and (c) figure out 
some way to get a tpm_chip pointer.

Spec at 
https://www.trustedcomputinggroup.org/specs/TPM/TCPA_Main_TCG_Architecture_v1_1b.pdf 
describes TPM_GetRandom on page 215.

	Jeff

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