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AlphaPC 164SX, DMA is broken for integrated IDE controller
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Alphaer
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PostPosted: Fri Feb 29, 2008 12:18 pm    Post subject: AlphaPC 164SX, DMA is broken for integrated IDE controller Reply with quote

AlphaPC 164SX, DMA is broken for integrated IDE controller cypress CY82C693 in new kernels (I've tested any from 2.6.22* to 2.6.24* provided by gentoo team)
Of course, appropriate controller and DMA support has been choosen.

Whan I try to enable DMA I get the error:

#hdparm -d 1 /dev/hdc

setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

There is my dmesg:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
CY82C693: IDE controller at PCI slot 0000:00:08.1
CY82C693: chipset revision 0
CY82C693: not 100% native mode: will probe irqs later
CY82C693U driver v0.34 99-13-12 Andreas S. Krebs (akrebs@altavista.net)
ide0: BM-DMA at 0x8480-0x8487, BIOS settings: hda:pio, hdb:pio
PCI: Enabling device: (0000:00:08.2), cmd 7
CY82C693: port 0x01f0 already claimed by ide0
CY82C693: neither IDE port enabled (BIOS)
Probing IDE interface ide0...
Probing IDE interface ide0...
Probing IDE interface ide1...
hdc: ST3802110A, ATA DISK drive
hdd: WDC WD800JB-00JJC0, ATA DISK drive
Probing IDE interface ide2...
Probing IDE interface ide3...
ide1 at 0x170-0x177,0x376 on irq 15
hdc: max request size: 512KiB
hdc: Host Protected Area detected.
current capacity is 156299375 sectors (80025 MB)
native capacity is 156301488 sectors (80026 MB)
hdc: Host Protected Area disabled.
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alex.blackbit
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PostPosted: Sun Mar 02, 2008 1:42 am    Post subject: Reply with quote

i cannot even compile 2.6.23-24 on my 164lx, didn't you have trouble?
the linux kernel is a nice thing, but on the !x86 platforms that are some serious problems in the final kernel releases from time to time.
do you really use the host protected area on that disk or is the driver confused?
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Alphaer
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PostPosted: Sun Mar 02, 2008 6:43 pm    Post subject: Reply with quote

alex.blackbit wrote:
i cannot even compile 2.6.23-24 on my 164lx, didn't you have trouble?
the linux kernel is a nice thing, but on the !x86 platforms that are some serious problems in the final kernel releases from time to time.
do you really use the host protected area on that disk or is the driver confused?


Yes, I've compiled that kernel with success, but after some "dances with drums around" :) how we say in Russia.
I disable all features unsupported by my 164SX. And the kernel succesfully compiled.
May be Gentoo alpha team can help us.
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alex.blackbit
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PostPosted: Sun Mar 02, 2008 10:43 pm    Post subject: Reply with quote

i am sure they are already working on that problem.
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Alphaer
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PostPosted: Mon Mar 03, 2008 10:19 am    Post subject: Reply with quote

You are the optimist :)

I'm not sure Alpha team had looked this thread/forum even
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alex.blackbit
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PostPosted: Mon Mar 03, 2008 2:22 pm    Post subject: Reply with quote

i believe they know about the problem anyway. but you can write them a email or say a word on the irc channel.
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