DMA gia DVD

[Φρίξος Κοψαχείλης]

Anakreon wrote:
>> Mipws o kernel sou exei metaglwtismenh thn yposthriksh DMA mono gia 
>> sklhrous? (yparxei tetoio option)
>> Epishs, o kernel blepei ton IDE controller ths mhtrikhs sou me th 
>> marka toy? dld fortwnei ton antistoixo driver, h xrhsimopoiei generic 
>> IDE support?
>>
> Pos mporo na apoktiso tis parapano plirofories? Yparxei kapoia entoli
> pou tis parexei?
> 
> 
Nai. Ola ta options tou pyrhna soy einai sto arxeio config.gz pou 
brisketai sto /proc.
Me thn entolh 'zcat /proc/config.gz |grep keyword' vlepeis ti timh exei 
to 'keyword' option. gia DMA yposthriksh antikatasthse to keyword me 
DMA. Tha sou bgalei kamia dekaria options, ena ek twn opoiwn tha einai 
to "# CONFIG_IDEDMA_ONLYDISK is not set"
An to en logw option einai "CONFIG_IDEDMA_ONLYDISK=y" tote tha prepei na 
  ksanakaneis compile. An oxi, proxwra parakatw:

Gia na deis an o pyrhnas exei fortwsei driver eidiko gia ton IDE 
controller sou, tha xreiasteis tis entoles 'lspci' kai 'dmesg'.

H lspci deixnei poia PCI devices yparxoun sto systhma. (Aytes tis 
plhrofories tis dinei to BIOS).

An dwseis lspci -v ha deis (metaksy pollwn allwn) kati tetoio (ayto 
einai apo to diko mou systhma):


0000:00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2)
(prog-if 8a [Master SecP PriP])
	Subsystem: Giga-byte Technology: Unknown device 5002
	Flags: bus master, 66Mhz, fast devsel, latency 0
	I/O ports at f000 [size=16]
	Capabilities: <available only to root>

Dipla sto 'IDE interface' loipon tha grafei to onoma tou en logw chip 
ths mhtrikhs sou. To shmeiwneis kai synexizeis:

dinontas 'dmesg', blepeis ta mhnymata tou pyrhna genika. an th dwseis 
amesws afou ksekinhsei to systhma blepeis mono ta boot messages. (den 
exei prolabei na katagrapsei kati allo). H eksodos ths dmesg loipon sou 
leei ti fortwnei o kernel. An kapou ekei mesa deis kati tetoio (symfwna 
panta me to parapanw paradeigma tou systhmatos mou)


NFORCE2: IDE controller at PCI slot 0000:00:09.0
NFORCE2: chipset revision 162
NFORCE2: not 100% native mode: will probe irqs later
NFORCE2: BIOS didn't set cable bits correctly. Enabling workaround.
NFORCE2: 0000:00:09.0 (rev a2) UDMA133 controller
     ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
     ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA


shmainei oti o kernel exei driver gia to nForce IDE chip kai ton exei 
fortwsei. Se mena, ean den fortwne ayto ton driver arneito 
kathgorhmatika na energopoihsei to DMA se opoiodhpote IDE device.

Ayta. Elpizw na mh se zalisa.

-- 
Frixos "I/We/Gaia" Kopsachilis