From b3a706014e56b1356e7b275fd25b833c63175bf0 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 2 Oct 2007 12:38:26 -0400 Subject: 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 [edited to work on SATA too, changing name from 'pata_dma' to 'dma'] Signed-off-by: Jeff Garzik --- include/linux/libata.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/libata.h') 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 { -- cgit v1.2.3