From owner-freebsd-atm Tue Jan 16 9:19: 3 2001 Delivered-To: freebsd-atm@freebsd.org Received: from mail.matriplex.com (ns1.matriplex.com [208.131.42.8]) by hub.freebsd.org (Postfix) with ESMTP id 2951637B401 for ; Tue, 16 Jan 2001 09:18:46 -0800 (PST) Received: from mail.matriplex.com (mail.matriplex.com [208.131.42.9]) by mail.matriplex.com (8.9.2/8.9.2) with ESMTP id JAA00836; Tue, 16 Jan 2001 09:18:43 -0800 (PST) (envelope-from rh@matriplex.com) Date: Tue, 16 Jan 2001 09:18:43 -0800 (PST) From: Richard Hodges To: Mike Tancsa Cc: freebsd-atm@FreeBSD.ORG Subject: Re: ATM under 4.x STABLE ? In-Reply-To: <5.0.1.4.0.20010116114713.033bd7c0@marble.sentex.ca> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-atm@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Tue, 16 Jan 2001, Mike Tancsa wrote: > > Thanks for the quick response! I have the card installed, but it seems to > be complaining about broken DMA. This is on an Intel 810e motherboard. I > ran the DOS diag util and according to it, all tests including the DMA > tests passed. > > en0: mem 0xfe000000-0xfe3fffff irq 11 at > device 8.0 on pci1 > en0: unexpected timeout in rx DMA test > en0: WARNING: DMA test detects a broken PCI chipset! > trying to work around the problem... but if this doesn't > work for you, you'd better switch to a newer motherboard. Ouch! Looking at /usr/src/sys/dev/en/midway.c I see some very interesting notes about broken DMA in the Efficient card (but not Adaptec). The driver is supposed to work around that, though. Your DMA message above seems to refer to the chipset not being able to handle "misaligned 64 byte DMA", which might not be a major problem, but just might reduce the performance. Of course, the real authority is Chuck Cranor himself... -Richard ------------------------------------------- Richard Hodges | Matriplex, inc. | 769 Basque Way rh@matriplex.com | Carson City, NV 89706 775-886-6477 | www.matriplex.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-atm" in the body of the message