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Date: Sat, 3 Mar 2012 16:27:20 -0500
From: Jeff Blank <jb000003@mr-happy.com>
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Subject: Re: missing disk device under 9-STABLE
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On Sat, Mar 03, 2012 at 11:18:55PM +0200, Alexander Motin wrote:
> MSI interrupts could give a bit better performance. But with regular 
> HDDs I think it is unlikely that you notice any difference. What's about 
> about old driver, it never used MSI by default, while new one does.

I see, thanks.

> What board and chipset do you use? Have you tried to update BIOS? Please 

I have not investigated a BIOS upgrade.  I'll look into it.

> show `pciconf -lvcb` output about the controller.

the AHCI driver attachment:

ahci0@pci0:0:17:0:      class=0x01018f card=0x43901002 chip=0x43901002 rev=0x00 hdr=0x00
    vendor     = 'ATI Technologies Inc'
    device     = 'SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode]'
    class      = mass storage
    subclass   = ATA
    bar   [10] = type I/O Port, range 32, base 0x9000, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0x8000, size  4, enabled
    bar   [18] = type I/O Port, range 32, base 0x7000, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x6000, size  4, enabled
    bar   [20] = type I/O Port, range 32, base 0x5000, size 16, enabled
    bar   [24] = type Memory, range 32, base 0xfb9ffc00, size 1024, enabled
    cap 05[50] = MSI supports 4 messages, 64 bit 
    cap 12[70] = SATA Index-Data Pair

the ATA driver attachment, included for completeness:

atapci0@pci0:0:20:1:    class=0x01018a card=0x439c1002 chip=0x439c1002 rev=0x00 hdr=0x00
    vendor     = 'ATI Technologies Inc'
    device     = 'SB7x0/SB8x0/SB9x0 IDE Controller'
    class      = mass storage
    subclass   = ATA
    bar   [20] = type I/O Port, range 32, base 0xff00, size 16, enabled
    cap 05[70] = MSI supports 2 messages 

thanks,
Jeff