Date: Fri, 5 Jul 2002 11:26:44 +0300 (EEST) From: Taavi Talvik <taavi@uninet.ee> To: Martin Blapp <mb@imp.ch> Cc: hackers@freebsd.org, <mckay@thehub.com.au>, <wpaul@freebsd.org> Subject: Re: dc0: failed to force tx and rx to idle state Message-ID: <20020705112412.G47253-100000@valu.uninet.ee> In-Reply-To: <20020705100135.U41780-100000@levais.imp.ch>
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On Fri, 5 Jul 2002, Martin Blapp wrote:
For me without "options PCI_ENABLE_IO_MODES" same card just
refused to work. Exactly same error message.
best regards,
taavi
>
> Hi all,
>
> This problem still persists. On my Laptop a ACCTON MiniPCI
> 100Mbit card does make this output. Then I loose my network
> connection. Only a ifconfig down/up of the interface helps.
>
> This is very annoyoing. Doing a cvsup, it happens about 5 - 10
> times. I have to stand by and look if it goes down again :P
>
> # pciconf -lv
> dc0@pci0:17:0: class=0x020000 card=0x22421113 chip=0x12161113 rev=0x11
> hdr=0x0$vendor = 'Accton Technology Corporation'
> device = 'EN5251-Based Fast Ethernet Adapter'
> class = network
> subclass = ethernet
>
> It's a Acction MiniPCI 2242 card.
>
> I'm quoting here Stephen's mail <mckay@thehub.com.au> he sent to the lists one
> year ago ...
>
> > This is my fault, sort of. The long explanation follows:
> >
> > A real Intel 21143 requires both the transmitter and the receiver to be idle
> > when changing certain things (selecting full or half duplex, for example).
> >
> > In dc_setcfg() the driver disables both the transmitter and the receiver
> > so it can set a few flags, but, in earlier versions, only checked to see if
> > *either* of them actually went idle. I fixed that bug, and most of the
> > clone chips seem to implement this stuff properly.
> >
> > But the PNIC doesn't do this right. Or perhaps we are giving it grief some
> > other way and it's bellyaching at an unfortunate time. It's hard to tell
> > because the PNIC docs are a bit thin, and I don't have a PNIC to play with.
> >
> > Regardless, the old code works on the PNIC. Maybe the PNIC doesn't
> > need to idle the transmitter to change these modes. Clone makers don't
> > have to implement all the limitations of the original, after all.
> >
> > Now, if any of you are still reading :-) perhaps you'd like to try this
> > patch. This should stop the "failed to force tx and rx to idle" message
> > but will introduce a debugging message that would be helpful for me
> > to see.
> >
> > I'd like anyone who is testing for the 4.3 release, who uses any of the
> > cards supported by the dc driver, and who has a bit of spare time, to
> > try this patch, and send me the results. When you get bored with the
> > diag output, just delete the obvious printf.
>
> --- if_dc.c.orig Tue Mar 6 22:41:17 2001
> +++ if_dc.c Sun Mar 18 20:16:30 2001
> @@ -1204,11 +1204,12 @@
>
> for (i = 0; i < DC_TIMEOUT; i++) {
> isr = CSR_READ_4(sc, DC_ISR);
> - if (isr & DC_ISR_TX_IDLE &&
> + if ((isr & DC_ISR_TX_IDLE || DC_IS_PNIC(sc)) &&
> (isr & DC_ISR_RX_STATE) == DC_RXSTATE_STOPPED)
> break;
> DELAY(10);
> }
> + printf("dc%d: i=%d isr=0x%x\n", sc->dc_unit, i, isr);
>
> if (i == DC_TIMEOUT)
> printf("dc%d: failed to force tx and "
>
> I've done this. All I get is this debug output:
>
> dc0: i=1000 isr=0xfc07c016
> dc0: failed to force tx and rx to idle state
>
> As you see the message still persits.
>
> Maybe Stephen is correct when he tells:
>
> > Maybe the PNIC doesn't need to idle the transmitter to
> > change these modes. Clone makers don't have to implement
> > all the limitations of the original, after all.
>
> Martin
>
> Martin Blapp, <mb@imp.ch> <mbr@FreeBSD.org>
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-----------------------------------------------------------
Taavi Talvik | Internet: taavi@uninet.ee
AS Uninet | phone: +372 6800013
Parnu mnt. 105 | fax: +372 6800001
Tallinn 11312, Estonia | gsm: +372 56569996
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