Date: Wed, 17 Mar 1999 17:21:57 -0500 (EST) From: Charles Tudor <sascht@unx.sas.com> To: wes@softweyr.com (Wes Peters) Cc: jwd@unx.sas.com, freebsd-hackers@freebsd.org, sascht@unx.sas.com Subject: Re: fxp driver causing lockup Message-ID: <199903172221.AA00704@loki.unx.sas.com> In-Reply-To: <36EF5749.2B1A8D21@softweyr.com> from "Wes Peters" at Mar 17, 99 00:18:33 am
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> > "John W. DeBoskey" wrote: > > > > Hi, > > > > I beleive you are correct. The following code fragment from > > if_fxp.c is the lockup: > > > > /* > > * Start the config command/DMA. > > */ > > fxp_scb_wait(sc); > > CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(&cbp->cb_status)); > > CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START); > > /* ...and wait for it to complete. */ > > while (!(cbp->cb_status & FXP_CB_STATUS_C)); > > Yup, that's it. I initially tracked this down under 3.0, but moved the > machine back to 2.2.7 because I needed it to get work done. I've now > stuffed two 3c905Bs into it for my main and test network, and can play > with the Pro 100B without losing a network connection. > > > according to doc at Dell's website (they have a machine with this > > problem), the bios is not enabling dma on the adapter board. I beleive > > the person I copied on this mail can provide the precise web page > > that documents this. > > > > According to them, it is possible to discreetly turn on dma on > > the adapter. This is were someone with the appropriate doc needs > > to jump in... > > > > Basically, the driver needs to check that dma is enabled and > > enable it if not. > > Any hints as to how to do that? I've got the machine, the lockups, > and a (little) bit of driver knowlege. Plus a fair bit of tenacity. > The Linux 2.2 driver exhibits the same problem on these machines, so I > can either share the fix with them or just convince them to upgrade > to FreeBSD once I get this nailed. ;^) > > -- > "Where am I, and what am I doing in this handbasket?" > > Wes Peters Softweyr LLC > http://www.softweyr.com/~softweyr wes@softweyr.com > I am trying to contact Intel to see if I can get the information needed to fix the problem. I will let you know if I receive the information. Charles To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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