prospects for DMA support for SiS962(L) Southbridge?

Rich Morin rdm at cfcl.com
Sun Sep 14 23:03:34 PDT 2003


With FreeBSD 4.9 on the horizon, I thought I might bring this up again...

At 10:01 AM -0700 6/17/03, Rich Morin wrote:
>I recently upgraded my motherboard and CPU, as:
>
>   478 pin Celeron; 2.1 GHz
>   512 MB DDR DIMM (2 ea.)
>   SiS962(L) Southbridge
>
>I then found that I couldn't boot the (FreeBSD 4.7) system, getting:
>
>   ad0: READ command timeout tag=0 serv=0 resetting
>   ata0: resetting devices
>
>After a bunch of Googling and some discussions on freebsd-questions,
>I decided to change line 90 of /usr/src/sys/dev/ataata-disk.c to:
>
>     static int ata_dma = 0;
>
>This works, but I suspect that it is slowing down my disk I/O quite a
>bit.  So, I would like to know the prospects for this controller being
>supported in FreeBSD any time soon.
-- 
email: rdm at cfcl.com; phone: +1 650-873-7841
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