Commit fbbb262d authored by Robert Hancock's avatar Robert Hancock Committed by Jeff Garzik

[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: default avatarRobert Hancock <>
Cc: Jeff Garzik <>
Cc: Tejun Heo <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarJeff Garzik <>
parent 6e9d8629
......@@ -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)) {
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);
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