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Message-ID: <3DF3A240.2000508@pobox.com>
Date: Sun, 08 Dec 2002 14:49:20 -0500
From: Jeff Garzik <jgarzik@pobox.com>
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To: hps@intermeta.de
CC: linux-kernel@vger.kernel.org
Subject: Re: Oops with 3c59x module (3com 3c595 NIC)
References: <20021207164300.2a35f18d.mjr318@psu.edu> <3DF2738A.2447599@digeo.com> <3DF28151.40706@pobox.com> <asve18$2i0$1@forge.intermeta.de>
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Henning P. Schmiedehausen wrote:
> Jeff Garzik <jgarzik@pobox.com> writes:
> 
> 
>>pci-skeleton.c and several of Don's drivers actually do do something 
>>else on TxUnderrun, twiddle DMA burst settings:
> 
> 
>>        if ((intr_status & TxUnderrun)
>>                && (np->tx_config & TxThresholdField) != 
>>TxThresholdField) {
>>                long ioaddr = dev->base_addr;
>>                np->tx_config += TxThresholdInc;
>>                writel(np->tx_config, ioaddr + TxMode);
>>                np->stats.tx_fifo_errors++;
>>        }
> 
> 
>>I wonder how feasible it is to do that on 3c59x hardware?
> 
> 
> I wonder whether this is not a layer violation. Shouldn't there be
> some sort of API call to do this?


that's unlikely because this operation is incredibly hardware-specific.

	Jeff



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