Re: libata ignores non-dma disks?

[Ed Sweetman <safemode@comcast.net>]

Jeff Garzik wrote:

> Ed Sweetman wrote:
>
> > I'm using 2.6.16-rc6-ide1 (alan's patchset) and using the sata_nv and
> > pata_amd drivers.  I have all UDMA drives except a CF disk -> IDE
> > interface, which should be running in PIO mode4.   Libata detects the
> > device, but spits out a message about "no dma" and then says it's not
> > supported and is ignoring it.   Is this device not supported because
> > it's not using dma or for some other reason?
> > It's the only device on it's channel (secondary pata)
> >
> > ata6: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xF008 irq 15
> > ata6: dev 0 cfg 49:0e00 82:0000 83:0000 84:0000 85:0000 86:0000 87:0000
> > 88:0000
> > ata6: no dma
> > ata6: dev 0 not supported, ignoring
> > scsi5 : pata_amd
>
>
> Delete the "no dma" check, and debug from there...  PIO support is in 
> there, just needs a few final fixes.
>
>     Jeff


Works perfectly now.   Thanks.   What isn't finished about it? 

anyways, here's an hdparm readout, for those that care.

CompactFlash ATA device, with removable media
       Model Number:       TOSHIBA THNCF512MPG
       Serial Number:      TSBC512M05928B66857C
       Firmware Revision:  1.00
Standards:
       Likely used: 4
Configuration:
       Logical         max     current
       cylinders       993     993
       heads           16      16
       sectors/track   63      63
       --
       bytes/track: 33264      bytes/sector: 528
       CHS current addressable sectors:    1000944
       LBA    user addressable sectors:    1000944
       device size with M = 1024*1024:         488 MBytes
       device size with M = 1000*1000:         512 MBytes
Capabilities:
       LBA, IORDY(can be disabled)
       Buffer size: 2.0kB      bytes avail on r/w long: 4      Queue 
depth: 1
       Standby timer values: spec'd by Vendor
       R/W multiple sector transfer: Max = 1   Current = 1
       DMA: not supported
       PIO: pio0 pio1 pio2 pio3 pio4
            Cycle time: no flow control=120ns  IORDY flow control=120ns

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