Date: Tue, 08 Mar 2005 15:33:34 -0700 From: Scott Long <scottl@samsco.org> To: Kevin Oberman <oberman@es.net> Cc: "M. Warner Losh" <imp@bsdimp.com> Subject: Re: cvs commit: src/sys/dev/cardbus cardbus.c Message-ID: <422E283E.3080009@samsco.org> In-Reply-To: <20050308221021.5FA265D08@ptavv.es.net> References: <20050308221021.5FA265D08@ptavv.es.net>
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Kevin Oberman wrote:
>>Date: Tue, 08 Mar 2005 09:35:35 -0700 (MST)
>>From: "M. Warner Losh" <imp@bsdimp.com>
>>Sender: owner-cvs-all@freebsd.org
>>
>>In message: <20050308072731.GI94451@obiwan.tataz.chchile.org>
>> Jeremie Le Hen <jeremie@le-hen.org> writes:
>>: > Both laptops are Dell (Inspiron 4150 and Inspiron 8100).
>>:
>>: I don't know if it cares, but mine is a Dell Latitute CPx.
>>:
>>: dmesg(8) is attached, with cardbus rev 1.48.
>>
>>This looks like it is working to me. Is that correct? I tried it
>>last night on my Sony and got two interesting results. The rl card I
>>have just worked, and the dc card appeared to work, but locked up the
>>system completely. I've noticed some anomalies with the lights on the
>>card (which indicate power issues), which may be the cause of some of
>>these problems. I'll look into those when I get the chance (maybe
>>Thursday night unless work is exceptionally non-busy before then).
>
>
> The if_dc issues is with busdma and Scott is aware of it. (Hopefully a
> fix is coming soon.) In the meantime I have a patch to get dc to work
> again. It's a kludge, but it at least lives.
>
>
> ------------------------------------------------------------------------
>
> --- sys/pci/if_dc.c~ Fri Oct 15 17:53:44 2004
> +++ sys/pci/if_dc.c Mon Dec 20 14:22:48 2004
> @@ -2151,8 +2151,8 @@
> }
>
> /* Allocate a busdma tag for mbufs. */
> error = bus_dma_tag_create(NULL, PAGE_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
> - BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES * DC_TX_LIST_CNT,
> + BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
> DC_TX_LIST_CNT, MCLBYTES, 0, NULL, NULL, &sc->dc_mtag);
> if (error) {
> printf("dc%d: failed to allocate busdma tag\n", unit);
I think that this patch is actually the correct thing to do. I also
believe that the alignment argument should be changed from PAGE_SIZE to
'1'. Considering that busdma never used to do alignment fixups, this
change should effectively be a NOP for the driver, and will avoid the
whole bounce-buffer mess. Care to give this a sanity test?
Scott
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