DMA problems with ICH5 in ATA mode

DMA problems with ICH5 in ATA mode

[Roy Sigurd Karlsbakk]

hi

I have a disk connected to one of the below controllers in ATA mode, 
but I can't enable DMA on it. Intel ATA support is in kernel, but when 
hdparm -d1 /dev/hdc I get the following (extracted from strace)

write(4, " HDIO_SET_DMA failed: Operation "..., 46 HDIO_SET_DMA failed: 
Operation not permitted

lspci -vvvvvv gave this

0000:00:1f.2 IDE interface: Intel Corp. 82801EB (ICH5) Serial ATA 150 
Storage Controller (rev 02) (prog-if 8a [Master SecP PriP])
         Subsystem: Micro-Star International Co., Ltd.: Unknown device 
7650
         Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR- FastB2B-
         Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium 
 >TAbort- <TAbort- <MAbort- >SERR- <PERR-
         Latency: 0
         Interrupt: pin A routed to IRQ 0
         Region 0: I/O ports at <unassigned>
         Region 1: I/O ports at <unassigned>
         Region 2: I/O ports at <unassigned>
         Region 3: I/O ports at <unassigned>
         Region 4: I/O ports at fc00 [size=16]


please cc: to me as I'm not on the list

roy

Re: DMA problems with ICH5 in ATA mode

[Jeff Garzik]

Roy Sigurd Karlsbakk wrote:
> hi
> 
> I have a disk connected to one of the below controllers in ATA mode, but 
> I can't enable DMA on it. Intel ATA support is in kernel, but when 
> hdparm -d1 /dev/hdc I get the following (extracted from strace)
> 
> write(4, " HDIO_SET_DMA failed: Operation "..., 46 HDIO_SET_DMA failed: 
> Operation not permitted

You either need to (a) disable legacy (combined) mode, (b) use piix 
rather than generic IDE driver, or (c) enable libata for your SATA.

	Jeff