Date: Wed, 24 Jun 2009 19:25:47 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r194890 - head/share/man/man4 Message-ID: <200906241925.n5OJPlFq026015@svn.freebsd.org>
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Author: mav Date: Wed Jun 24 19:25:47 2009 New Revision: 194890 URL: http://svn.freebsd.org/changeset/base/194890 Log: Document new hint.atapci.X.msi and hint.ata.X.pm_level tunables. Modified: head/share/man/man4/ata.4 Modified: head/share/man/man4/ata.4 ============================================================================== --- head/share/man/man4/ata.4 Wed Jun 24 19:16:48 2009 (r194889) +++ head/share/man/man4/ata.4 Wed Jun 24 19:25:47 2009 (r194890) @@ -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 (defa 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
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