Problems with init of Marvell PCI Express SATA Card

Problems with init of Marvell PCI Express SATA Card

[Tom Morrison]

I am running a relatively recent 2.6.20 
Linux kernels running on both an Intel 
x86 (XEON) as well as one a embedded 
powerPC target (MPC8548E).

I believe my PCI Express interface is 
working correctly on both the embedded 
target as well as - of course - on the 
XEON platform (I have other cards that 
I have working correctly).

The problem is that this Marvell PCI Express 
SATA Card is NOT being probed and thus, 
the SATA/ATA host interface is NOT being 
initialized, and thus the drive is NOT being 
detected/added able to be mounted...

I have more (in)sight into the embedded 
platform, and the SATA module is being 
built into /loaded by the kernel (it does 
a pci_device_register()), but nothing happens 
after that - I see before that the card IS 
being seen on the BUS - I can do a "lspci" 
after that - and the device is on the PCI bus...

I should also add that I have the identical
card on the PCI bus (6042 chip) and the
driver works flawlessly...

What am I doing wrong? Do I need to have 
the PCI ids in the kernel match identically 
what is on pci express sata card device?

Heck, if there is a PCI device register - 
why isn't there an associated probe - no 
matter what?

I apologze if my question is a little 
naive, I am not a PCI expert - I was hoping 
that this would go smoothly enough that I 
wouldn't need to become one!

thanks in advance for all your wisdom!

Sincerely,

Tom Morrison
Principal Software Engineer
EMPIRIX
20 Crosby Drive - Bedford, MA  01730
p: 781.266.3567 f: 781.266.3670
email: tmorrison@empirix.com
www.empirix.com

Re: Problems with init of Marvell PCI Express SATA Card

[Alan]

> What am I doing wrong? Do I need to have 
> the PCI ids in the kernel match identically 
> what is on pci express sata card device?

And driver support which may or may not be present depending on the card.

Alan

RE: Problems with init of Marvell PCI Express SATA Card

[Tom Morrison]

Alan,

Where do I look in the kernel to see if there is
'driver support' present based upon the card?

As I mentioned as well, the same driver is used
for the PCI Driver (using 6042 chip). So, at some
level, the support is there.

The key is does Linux *Kernel* support for PCI
Express have support for this card? Which goes
back to the initial question - where/how do I
look to see if it does????

thanks Alan for any more insight!

Tom

-----Original Message-----
>> Alan Wrote:
>>
>> > Tom Wrote:
>> > What am I doing wrong? Do I need to have
>> > the PCI ids in the kernel match identically
>> > what is on pci express sata card device?
>>
>> And driver support which may or may not be present depending on the card.

Re: Problems with init of Marvell PCI Express SATA Card

[Alan]

On Fri, 23 Feb 2007 18:21:26 -0500
"Tom Morrison" <Tom.Morrison@Verizon.net> wrote:

> Alan,
> 
> Where do I look in the kernel to see if there is
> 'driver support' present based upon the card?
> 
> As I mentioned as well, the same driver is used
> for the PCI Driver (using 6042 chip). So, at some
> level, the support is there.
> 
> The key is does Linux *Kernel* support for PCI
> Express have support for this card? Which goes
> back to the initial question - where/how do I
> look to see if it does????

PCI Express looks like PCI so generally there isn't specific support 
needed. The Marvell driver supports the 6101 and 6145 chipsets for PATA
and for SATA the sata_mv driver supports the 5040, 5041, 5080, 5081,
6040, 6041, 6042, 6080, 6081.

Alan

RE: Problems with init of Marvell PCI Express SATA Card

[Tom Morrison]

Alan,

Where are you looking for sata_mv driver support.

if you look in the sata_mv.c it has support for the 
7042 throughout it (exactly the same as PCI in fact - 
its the same core chip - just different bus interface)...

but agreed an unknown device in the pci ids...or is 
there another place where I should be looking for 
7042 support?

or does it look in pci ids & if it doesn't know 
the registered device type (chip) - it doesn't 
probe it - even if it does a pci_register_device()?

????

I am sorry for being so Naive here - but obviously
there is a disconnect here (there is some PEBKAC...:-)

t

-----Original Message-----
From: Alan [mailto:alan@lxorguk.ukuu.org.uk]

>> PCI Express looks like PCI so generally there isn't 
>> specific support needed. The Marvell driver supports 
>> the 6101 and 6145 chipsets for PATA and for SATA 
>> the sata_mv driver supports the 5040, 5041, 5080, 5081,
>> 6040, 6041, 6042, 6080, 6081.

Alan

Re: Problems with init of Marvell PCI Express SATA Card

[Alan]

> if you look in the sata_mv.c it has support for the 
> 7042 throughout it (exactly the same as PCI in fact - 
> its the same core chip - just different bus interface)...

For the 7042 with the TTI PCI identifier but not one with a Marvell ID -
what vendor/device does your device show up ?

The probe code uses the table in each driver to do matches. For the 7042
the only version it knows is

   { PCI_VDEVICE(TTI, 0x2310), chip_7042 },

RE: Problems with init of Marvell PCI Express SATA Card

[Tom Morrison]

got it! thank you for showing the error of my way...
and being so patient with me!  damm, that means
I gotta work this weekend...:-)...

-----Original Message-----
From: Alan [mailto:alan@lxorguk.ukuu.org.uk]
Sent: Friday, February 23, 2007 8:18 PM
To: Tom.Morrison@Verizon.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: Problems with init of Marvell PCI Express SATA Card


> if you look in the sata_mv.c it has support for the 
> 7042 throughout it (exactly the same as PCI in fact - 
> its the same core chip - just different bus interface)...

For the 7042 with the TTI PCI identifier but not one with a Marvell ID -
what vendor/device does your device show up ?

The probe code uses the table in each driver to do matches. For the 7042
the only version it knows is

   { PCI_VDEVICE(TTI, 0x2310), chip_7042 },