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authorAlan Cox <alan@redhat.com>2007-10-02 12:38:26 -0400
committerJeff Garzik <jeff@garzik.org>2007-10-12 14:55:45 -0400
commitb3a706014e56b1356e7b275fd25b833c63175bf0 (patch)
tree1595a67c8b09f9222c4d59f466acca681a56a02c /include/linux/libata.h
parent7100819f5f9b99eb7c7dd5597f293388a405bf7b (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/linux/libata.h')
-rw-r--r--include/linux/libata.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index ca296a575c4a..84dfc23b9d31 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 {