linux-kernel - Re: IT821x: no DMA since 2.6.21

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Date:	Fri, 18 May 2007 11:47:22 +0200
From:	Thomas Kuther <gimpel@...nenkinder.org>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: Re: IT821x: no DMA since 2.6.21

On Mi, 16.05.07 11:46 Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
wrote:

> > Shall I test it without "noraid=1" too? 
> 
> Please do, the main goal of the patch was to fix "RAID mode"
> ("noraid=1" should work fine also without the patch?).
> 
> Thanks,
> Bart

Hi,

sorry for late response. Now the results in smart mode:
---------------------------------------------------
IT8212: IDE controller at PCI slot 0000:00:09.0
ACPI: PCI Interrupt 0000:00:09.0[A] -> GSI 17 (level, low) -> IRQ 18
IT8212: chipset revision 17
it821x: controller in smart mode.
IT8212: 100% native mode on irq 18
    ide2: BM-DMA at 0xdc00-0xdc07, BIOS settings: hde:pio, hdf:pio
    ide3: BM-DMA at 0xdc08-0xdc0f, BIOS settings: hdg:pio, hdh:pio
Probing IDE interface ide2...
hde: SAMSUNG SP2514N, ATA DISK drive
hdf: Maxtor 6Y120L0, ATA DISK drive
hde: Performing identify fixups.
hdf: Performing identify fixups.
ide2 at 0xec00-0xec07,0xe802 on irq 18
hde: max request size: 128KiB
hde: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63
 hde:hde: recal_intr: status=0x51 { DriveReady SeekComplete Error }
hde: recal_intr: error=0x04 { DriveStatusError }
ide: failed opcode was: unknown
 hde1
hdf: max request size: 128KiB
hdf: 240121728 sectors (122942 MB) w/2048KiB Cache, CHS=65535/16/63
 hdf:hdf: recal_intr: status=0x51 { DriveReady SeekComplete Error }
hdf: recal_intr: error=0x04 { DriveStatusError }
ide: failed opcode was: unknown
 hdf1
------------------------------------------------------

# hdparm -d1 /dev/hde

/dev/hde:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Input/output error
 using_dma     =  0 (off)

-------------------------------------------------------

Buffered reads: 3.06MB/s

Seems I shot too quick, DMA in smart mode still does not work.
"noraid=1" also works without the patch, correct.

Best,
Tom

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