From owner-freebsd-current Tue Aug 5 20:12:25 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id UAA23856 for current-outgoing; Tue, 5 Aug 1997 20:12:25 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id UAA23849 for ; Tue, 5 Aug 1997 20:12:18 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id MAA02887; Wed, 6 Aug 1997 12:42:02 +0930 (CST) From: Michael Smith Message-Id: <199708060312.MAA02887@genesis.atrad.adelaide.edu.au> Subject: Re: canonical issue wrt DMA & wd/wdc In-Reply-To: <199708060146.LAA18653@broon.off.connect.com.au> from George Michaelson at "Aug 6, 97 11:46:47 am" To: ggm@connect.com.au (George Michaelson) Date: Wed, 6 Aug 1997 12:42:02 +0930 (CST) Cc: current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk George Michaelson stands accused of saying: > > 1) can somebody add the DMA warning issues to an FAQ so we can understand > when it really means "DMA is disabled" as opposed to "your m.b. or BIOS > doesn't support enabling, who knows, lets wing it" If you are running -current you are expected to be able to work this sort of thing out for yourself. Adding diagnostic messages from a developmental driver to the FAQ is stupid. > 2) flags 0x80ff80ff blows up in config on wdc but works on wd instances This is nonsense; you can't put flags on 'wd' instances, and it works fine on 'wdc' (the only place you _can_ put it). > 3) assuming when an ASUS m.b. reports the disks are mode4 compliant its not > lying, does adding the flags buy me anything Which flags? The 80ff flags for each channel are required for 32-bit and multi-block mode to be used, yes. > 4) claims LINT explains how to enable new/untrustworthy DMA are untrue as > far as I can see (but then I'm hyper dumb :-) Read the commit message, or wait for the final version of the code 8) -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[