kern/38056: ahcisata fails to attach with a ServerWorks HT-1000 SATA

[Simon Burge <simonb%NetBSD.org@localhost>]

>Number:         38056
>Category:       kern
>Synopsis:       ahcisata fails to attach with a ServerWorks HT-1000 SATA
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 18 16:00:00 +0000 2008
>Originator:     Simon Burge
>Release:        NetBSD 4.99.54
>Organization:
>Environment:
System: NetBSD opteron.thistledown.com.au 4.99.54 NetBSD 4.99.54 (GENERIC) #0: 
Sat Feb 16 08:50:17 PST 2008  
builds@wb28:/home/builds/ab/HEAD/amd64/200802160002Z-obj/home/builds/ab/HEAD/src/sys/arch/amd64/compile/GENERIC
 amd64
Architecture: x86_64
Machine: amd64
>Description:
        Booting a -current kernel on a Tyan S3850 gives:

    ahcisata0 at pci1 dev 14 function 0: ServerWorks HT-1000 SATA
    ahcisata0: interrupting at irq 11
    ahcisata0: AHCI revision 0x0, 1 ports, 1 command slots, features 0x0
    atabus0 at ahcisata0 channel 0 
    ahcisata0: more ports than announced

        and then fails to attach.

        A netbsd-4 kernel doesn't attach ahcisata to this, even though
        the kernel config has achisata in it.  netbsd-4 attaches with:

    svwsata0 at pci1 dev 14 function 0
    svwsata0: ServerWorks HT-1000 SATA Controller (rev. 0x00)
    svwsata0: bus-master DMA support present
    svwsata0: using irq 11 for native-PCI interrupt
    svwsata0: primary channel wired to native-PCI mode
    atabus0 at svwsata0 channel 0
    svwsata0: secondary channel wired to native-PCI mode
    atabus1 at svwsata0 channel 1
    svwsata0: secondary channel wired to compatibility mode
    atabus2 at svwsata0 channel 2
    svwsata0: secondary channel configured to compatibility mode
    atabus3 at svwsata0 channel 3
    ...
    svwsata0 port 0: device present, speed: 1.5Gb/s
    wd0 at atabus0 drive 0: <FUJITSU MHT2080BH>
    wd0: drive supports 16-sector PIO transfers, LBA48 addressing
    wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 
sectors
    wd0: 32-bit data port
    wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
    wd0(svwsata0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using 
DMA)
    svwsata0 port 1: PHY offline
    svwsata0 port 2: PHY offline
    svwsata0 port 3: PHY offline 

>How-To-Repeat:
        Boot a -current kernel on a Tyan Tomcat K8SH (S3850) motherboard
        with a ServerWorks HT1000 SATA controller.

>Fix:
        None given.  A workaround is to just disable achisata(4) and fall
        back to the still working svwsata(4).

>Unformatted:
        From HEAD autobuild 200802160002Z