diff options
| author | Alan Cox <alan@redhat.com> | 2007-10-02 12:38:26 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:45 -0400 |
| commit | b3a706014e56b1356e7b275fd25b833c63175bf0 (patch) | |
| tree | 1595a67c8b09f9222c4d59f466acca681a56a02c /include | |
| parent | 7100819f5f9b99eb7c7dd5597f293388a405bf7b (diff) | |
libata: Add a drivers/ide style DMA disable
This is useful when debugging, handling problem systems, or for
distributions just to get the system installed so it can be sorted
out later.
This is a bit smarter than the old IDE one and lets you do
libata.dma=0 Disable all PATA DMA like old IDE
libata.dma=1 Disk DMA only
libata.dma=2 ATAPI DMA only
libata.dma=4 CF DMA only
(or combinations thereof - 0,1,3 being the useful ones I suspect)
(I've split CF as it seems to be a seperate case of pain and suffering
different to the others and caused by assorted PIO wired adapters etc)
Signed-off-by: Alan Cox <alan@redhat.com>
[edited to work on SATA too, changing name from 'pata_dma' to 'dma']
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/libata.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index ca296a575c4..84dfc23b9d3 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -331,6 +331,12 @@ enum { ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */ ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ + + /* DMA mask for user DMA control: User visible values; DO NOT + renumber */ + ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ + ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ + ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ }; enum hsm_task_states { |