Re: Re: SVN rev 206755 breakage

On 18 Apr 2010, at 14:05, Alexander Motin wrote:

> Rui Paulo wrote:
>> On 18 Apr 2010, at 06:57, Alexander Motin wrote:
>>> Rui Paulo wrote:
>>>> On 17 Apr 2010, at 23:12, Michael Butler wrote:
>>>>> On 04/17/10 18:05, Rui Paulo wrote:
>>>>>> On 17 Apr 2010, at 22:34, Michael Butler wrote:
>>>>>>> The revision labeled:
>>>>>>> 
>>>>>>> SVN rev 206755 on 2010-04-17 11:40:39Z by rpaulo
>>>>>>> 
>>>>>>> Add another ICH7M chipset that works.
>>>>>>> 
>>>>>>> .. is incorrect and will cause some laptops to not boot.
>>>>>> So, in AHCI mode it doesn't find the disks?
>>>>> No - the driver fails to attach (ENXIO).
>>>> But since ahci failed to attach, won't atapci attach later?
>>> If probe succeeded - no.
>>> 
>>>> Can you show me the dmesg?
>>> More important probably would be `pciconf -lvcb`.
>>> 
>>> Intel controllers after ICH6 change both ID and set of resources,
>>> depending on AHCI enabled in BIOS. There is separate set of IDs for
>>> controllers with AHCI enabled. As I can see, Linux handles ID 0x27c4 as
>>> non-AHCI SATA. If for some reason this ID could be used for both modes
>>> (I have doubts),
>> 
>> It can be used in both modes. atapci used to attach to it on my MacBook.
> 
> Most of AHCI controllers could also work as usual PCI ATA, but not every
> PCI ATA could work as AHCI. It would be nice to compare `pciconf -lvbc`
> output in both working (Rui) and not working (Michael) cases.

atapci0_at_pci0:0:31:1:	class=0x01018a card=0x72708086 chip=0x27df8086 rev=0x02 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82801G (ICH7 Family) Ultra ATA Storage Controller'
    class      = mass storage
    subclass   = ATA
    bar   [10] = type I/O Port, range 32, base 0x1f0, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0x3f4, size  1, enabled
    bar   [18] = type I/O Port, range 32, base 0x170, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x374, size  1, enabled
    bar   [20] = type I/O Port, range 32, base 0x20c0, size 16, enabled

ahci0_at_pci0:0:31:2:	class=0x01018f card=0x72708086 chip=0x27c48086 rev=0x02 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller'
    class      = mass storage
    subclass   = ATA
    bar   [10] = type I/O Port, range 32, base 0x20d8, size  8, enabled
    bar   [14] = type I/O Port, range 32, base 0x20fc, size  4, enabled
    bar   [18] = type I/O Port, range 32, base 0x20d0, size  8, enabled
    bar   [1c] = type I/O Port, range 32, base 0x20f8, size  4, enabled
    bar   [20] = type I/O Port, range 32, base 0x2020, size 16, enabled
    bar   [24] = type Memory, range 32, base 0x90445000, size 1024, enabled
    cap 01[70] = powerspec 2  supports D0 D3  current D0

BTW, Mac OS X also uses AHCI on this controller.

--
Rui Paulo