Pack of CAM improvements

[Alexander Motin]

Yamagi Burmeister wrote:
> On Thu, 28 Jan 2010, Alexander Motin wrote:
> 
>>>> Yamagi Burmeister wrote:
>>>>> ahcich0: is 00000002 cs 00000000 ss 00000000 rs 00000001 tfd 50 serr
>>>>> 00000000
>>>>> ahcich0: Timeout on slot 0
>>>>
>>>> Try to disable MSI interrupts with `hint.ahci.0.msi=0`.
>>>
>>> That fixed the problem. Thank you :)
>>
>> That's quite strange, as in many other cases IXP700 is working fine.
>> Different revisions? What is your `pciconf -lvbc` reports?
> 
> When I helped nox@ debugging a problem with timeouts we noticed, that
> our controlers are of differend revisions. The pciconf output ist:
> 
> ahci0 at pci0:0:17:0:      class=0x010601 card=0x43911002 chip=0x43911002
> rev=0x00 hdr=0x00
>     vendor     = 'ATI Technologies Inc. / Advanced Micro Devices, Inc.'
>     device     = 'SB700 SATA Controller [AHCI mode]'
>     class      = mass storage
>     subclass   = SATA
>     bar   [10] = type I/O Port, range 32, base 0xd000, size  8, enabled
>     bar   [14] = type I/O Port, range 32, base 0xc000, size  4, enabled
>     bar   [18] = type I/O Port, range 32, base 0xb000, size  8, enabled
>     bar   [1c] = type I/O Port, range 32, base 0xa000, size  4, enabled
>     bar   [20] = type I/O Port, range 32, base 0x9000, size 16, enabled
>     bar   [24] = type Memory, range 32, base 0xfe8ff800, size 1024,
> enabled
>     cap 01[60] = powerspec 2  supports D0 D3  current D0
>     cap 05[50] = MSI supports 4 messages, 64 bit
>     cap 12[70] = SATA Index-Data Pair

What's interesting, is that Asus board with the same chipset doesn't
expose MSI support at all:

ahci0 at pci0:0:17:0:      class=0x010601 card=0x43911002 chip=0x43911002
rev=0x00 hdr=0x00
    vendor     = 'ATI Technologies Inc. / Advanced Micro Devices, Inc.'
    device     = 'SB700 SATA Controller [AHCI mode]'
    class      = mass storage
    subclass   = SATA
    bar   [10] = type I/O Port, range 32, base 0xc000, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0xb000, size  4, enabled
    bar   [18] = type I/O Port, range 32, base 0xa000, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x9000, size  4, enabled
    bar   [20] = type I/O Port, range 32, base 0x8000, size 16, enabled
    bar   [24] = type Memory, range 32, base 0xfbcffc00, size 1024, enabled
    cap 01[60] = powerspec 2  supports D0 D3  current D0
    cap 12[70] = SATA Index-Data Pair

-- 
Alexander Motin