Arno J. Klaassen wrote: > > Rather than the marginal HW part, it seems, for me, closely related to > MB/BIOS (as well (Alexander apperently has about the same setup as I > have for this test)): >
[...] > > I vaguely remember from another PR that the Promise card does > something with PCI-bursting which fbsd does not detect and/or > handle correctly (and beyond my simple skills as dumb tester, but > maybe the linux-sources contain a clue about that as well). > Analysis of chip initialization in vendor-supplied, Linux and FreeBSD drivers shows that FreeBSD's one: - does not enable something called 'BMR_BURST', - performs hotplug init in one write (instead of two read-modify-writes ), - does an extra write (offset 0x54) which is not done in other drivers. Analysis text: http://lxnt.info/tx4/chipinit.text Patch with ported chipinit (dangerous to use with anything from Promise other than sata300 tx4 !!): http://lxnt.info/tx4/freebsd/chipinit.patch (cumulative) http://lxnt.info/tx4/freebsd/ata-chipset.c+chipinit (patched source) Note two things: 1. I have not compiled or tested this patch. Please do. 2. I may have missed this bug because I'm frequently rebooting between Linux and FreeBSD, and what Linux driver initialized may have lasted the reboots. -- ./lxnt _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
