amd64/148526: [ahci] ahci driver does not boot on AMD chip

[Alexander Motin]

The following reply was made to PR amd64/148526; it has been noted by GNATS.

From: Alexander Motin <mav at FreeBSD.org>
To: Yury <yury at gorodok.net>
Cc: Andriy Gapon <avg at freebsd.org>, bug-followup at freebsd.org
Subject: Re: amd64/148526: [ahci] ahci driver does not boot on AMD chip
Date: Thu, 16 Dec 2010 19:39:50 +0200

 On 16.12.2010 19:11, Andriy Gapon wrote:
 > on 09/12/2010 19:08 Yury said the following:
 >> Here they are, message files.
 >>
 >> The "bad" file is messages during boot try with the ahci driver, and the "good"
 >> one is the backed up kernel version with ata driver.  In the "bad" boot try
 >> messages last lines could repeat infinitely. And, as I can see there are some
 >> 'time-out' messages in "good" variant, but everything works just fine. BIOS was
 >> updated to 15.06.
 >>
 >> Only differences in kernel config files are:
 >>
 >> <  device        ata
 >> <  device        atadisk
 >>     ---
 >>   >  #device        ata
 >>   >  #device        atadisk
 >>
 >> <  ##device        ahci
 >> <  device        atapicd
 >>     ---
 >>   >  device        ahci
 >>   >  #device        atapicd
 >>
 >
 > Yury,
 > will you be able to test ahci with this hardware using stable/8?
 
 I can see interrupt status bit set here. Timeout in that case may mean 
 that interrupt was not delivered/handled for some reason. Could you 
 check if this controller supports MSI interrupts with `pciconf -lvbc`? 
 If it does and driver uses it - you may try to disable it by setting 
 loader tunable `hint.ahci.0.msi=0'.
 
 It could also be useful to enable verbose kernel messages at boot menu.
 
 -- 
 Alexander Motin