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| -rw-r--r-- | share/man/man4/ata.4 | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/share/man/man4/ata.4 b/share/man/man4/ata.4 index 34d782b..a4cdfee 100644 --- a/share/man/man4/ata.4 +++ b/share/man/man4/ata.4 @@ -27,7 +27,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 4, 2008 +.Dd June 24, 2009 .Dt ATA 4 .Os .Sh NAME @@ -93,6 +93,24 @@ set to 1 for DMA access, 0 for PIO (default is DMA). set to 1 to enable Write Caching, 0 to disable (default is enabled). .Em WARNING : can cause data loss on power failures and crashes. +.It Va hint.atapci.X.msi +set to 1 to allow Message Signalled Interrupts (MSI) to be used by +specified PCI ATA controller, if supported. +.It Va hint.ata.X.pm_level +controls SATA interface Power Management for specified channel, +allowing to save some power by the cost of additional command latency. +Possible values: +.Bl -tag -compact +.It 0 +interface Power Management is disabled, default value. +.It 1 +device is allowed to initiate PM state change, host is passive. +.It 2 +host initiates PARTIAL PM state transition every time port becomes idle. +.It 3 +host initiates SLUMBER PM state transition every time port becomes idle. +.El +Modes 2 and 3 are implemented only for AHCI driver now. .El .Sh DESCRIPTION The |
