Re: libata ignores non-dma disks?

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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---

• References:
  • libata ignores non-dma disks?
    • From: Ed Sweetman <[email protected]>
  • Re: libata ignores non-dma disks?
    • From: Jeff Garzik <[email protected]>

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