Commit fbbb262d authored Oct 27, 2006 by Robert Hancock Committed by Jeff Garzik Dec 01, 2006

[PATCH] sata_nv ADMA/NCQ support for nForce4



This patch adds support for ADMA mode on NVIDIA nForce4 (CK804/MCP04) SATA
controllers to the sata_nv driver.  Benefits of ADMA mode include:

- NCQ support

- Reduced CPU overhead (controller DMAs command information from memory
  instead of them being pushed in by the CPU)

- Full 64-bit DMA support

ADMA mode is enabled by default in this version.  To disable it, set the
module parameter adma_enabled=0.

Signed-off-by: Robert Hancock <hancockr@shaw.ca>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

parent 6e9d8629

drivers/ata/libata-sff.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -732,7 +732,7 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
	qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {		qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
	u8 host_stat;		u8 host_stat;

	host_stat = ata_bmdma_status(ap);		host_stat = ap->ops->bmdma_status(ap);

	ata_ehi_push_desc(&ehc->i, "BMDMA stat 0x%x", host_stat);		ata_ehi_push_desc(&ehc->i, "BMDMA stat 0x%x", host_stat);

drivers/ata/sata_nv.c

+923 −11

File changed.

Preview size limit exceeded, changes collapsed.