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| author | mav <mav@FreeBSD.org> | 2011-12-02 12:52:33 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2011-12-02 12:52:33 +0000 |
| commit | 9be1bfa322fff9a906d73bb1d09940d86d489415 (patch) | |
| tree | 040e683bc3ac608cf9ff74f030ce4a869cacf0a0 /share | |
| parent | 2105513eb4dae9b2f0b771b8d025a33650eba4ab (diff) | |
| download | FreeBSD-src-9be1bfa322fff9a906d73bb1d09940d86d489415.zip FreeBSD-src-9be1bfa322fff9a906d73bb1d09940d86d489415.tar.gz | |
Add hw.ahci.force tunable to control whether AHCI drivers should attach
to known AHCI-capable chips (AMD/NVIDIA), configured for legacy emulation.
Enabled by default to get additional performance and functionality of AHCI
when it can't be enabled by BIOS. Can be disabled to honor BIOS settings if
needed for some reason.
MFC after: 1 month
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/ahci.4 | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/share/man/man4/ahci.4 b/share/man/man4/ahci.4 index 68aea35..08e9013 100644 --- a/share/man/man4/ahci.4 +++ b/share/man/man4/ahci.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 17, 2011 +.Dd December 2, 2011 .Dt AHCI 4 .Os .Sh NAME @@ -96,6 +96,9 @@ A manual bus reset is needed on device hot-plug. .It Va hint.ahcich. Ns Ar X Ns Va .sata_rev setting to nonzero value limits maximum SATA revision (speed). Values 1, 2 and 3 are respectively 1.5, 3 and 6Gbps. +.It Va hw.ahci.force +setting to nonzero value forces driver attach to some known AHCI-capable +chips even if they are configured for legacy IDE emulation. Default is 1. .El .Sh DESCRIPTION This driver provides the |
