On Thu, Apr 19, 2007 at 07:15:31PM +0200, Artur Grabowski wrote:
David Gwynne [EMAIL PROTECTED] writes:
intel provide both pciide and ahci for using sata disks. which one
gets used depends on a set of registers in the pci config space.
if you're serious about getting this to work find the datasheet at
developer.intel.com for this chipset, and look at the MAP and PCS
registers (i think thats them). you'll need to provide a custom
attach routine for your chipset to be called in ahci_attach which
tweaks those registers.
i think thats enough to get ahci working on that controller, but i am
probably wrong.
Erm... Now I'm confused.
On my laptop:
ahci0 at pci0 dev 31 function 2 Intel 82801GBM AHCI SATA rev 0x02 GHC 0x0:
AHCI 1.1: apic 2 int 16 (irq 11)
ahci0: capabilities: 0xc710ff03S64A,NCQ,SALP,SAL,SCLO,PMD,SSC,PSC ports: 4
ncmds: 32 gen: 1 (1.5Gbps)
ahci0: ports implemented: 0x0001
ahci0.0: port reset
ahci0: detected device on port 0
scsibus0 at ahci0: 32 targets
sd0 at scsibus0 targ 0 lun 0: ATA, HTS541080G9SA00, MB4I SCSI2 0/direct
fixed
sd0: 76319MB, 76319 cyl, 64 head, 32 sec, 512 bytes/sec, 156301488 sec total
It just works. Is this because I enabled ahci in the bios?
yes. if the bios doesnt enable it we have to do its job for it.
I had some strange diff earlier from someone, might even have been
you, that did some tweak to enable it even though it wasn't enabled in
the bios (that's when my laptop was crashing on reboot).
that was me, and the panic was something else that was fixed a few
weeks ago.
//art
On 19/04/2007, at 5:20 AM, giovanni wrote:
hello,
sorry for the question but I would like to understand a bit more
I've added PCI_PRODUCT_INTEL_82801GBM_SATA (product code 0x27c4)
to the ahci_devices list because I've (wrongly?) read somewhere that
Intel 82801GBM
was ahci compliant. Indeed at boot I've:
ahci0 at pci0 dev 31 function 2 Intel 82801GBM SATA rev 0x02 GHC
0x0; AHCI 1.1: apic...
ahci0: capabilities: 0xdf12ff03S64A, NCQ, SMPS, SSS, SALP, SAL, SCLO,
SPM, PMD, SSC,PSC
ports:4 ncmds:32 gen: 1 (1.5Gbps)
ahci0: ports implemented: 0x
have I to deduce that ahci is not available because Port Implemented
register is 0?
if so why is it reported a Number of port of 4? What is the sense of
this discrepancy?
thanks,
--
giovanni
