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.\" Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
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.\" $FreeBSD: release/9.1.0/share/man/man4/siis.4 220449 2011-04-08 12:46:47Z mav $
.\"
.Dd April 8, 2011
.Dt SIIS 4
.Os
.Sh NAME
.Nm siis
.Nd SiliconImage Serial ATA Host Controller driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device pci"
.Cd "device scbus"
.Cd "device siis"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
siis_load="YES"
.Ed
.Pp
The following tunables are settable from the
.Xr loader 8 :
.Bl -ohang
.It Va hint.siis. Ns Ar X Ns Va .msi
controls Message Signaled Interrupts (MSI) usage by the specified controller.
.It Va hint.siisch. Ns Ar X Ns Va .pm_level
controls SATA interface Power Management for the specified channel,
allowing some power to be saved at the cost of additional command
latency.
Possible values:
.Bl -tag -compact
.It 0
interface Power Management is disabled (default);
.It 1
device is allowed to initiate PM state change, host is passive.
.El
Note that interface Power Management is not compatible with
device presence detection.
A manual bus reset is needed on device hot-plug.
.It Va hint.siisch. 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.
.El
.Sh DESCRIPTION
This driver provides the
.Xr CAM 4
subsystem with native access to the
.Tn SATA
ports of controller.
Each SATA port is represented to CAM as a separate bus with 16 targets.
Most of the bus-management details are handled by the SATA-specific
transport of CAM.
Connected ATA disks are handled by the ATA protocol disk peripheral driver
.Xr ada 4 .
ATAPI devices are handled by the SCSI protocol peripheral drivers
.Xr cd 4 ,
.Xr da 4 ,
.Xr sa 4 ,
etc.
.Pp
Driver features include support for Serial ATA and ATAPI devices,
Port Multipliers (including FIS-based switching), hardware command queues
(31 command per port), Native Command Queuing, SATA interface Power Management,
device hot-plug and Message Signaled Interrupts.
.Pp
The activity LEDs of the adapters supported by the
.Nm
driver can be controlled via the
.Xr led 4
API for localization or status reporting purposes.
.Pp
Same hardware is also supported by the atasiliconimage driver from
.Xr ata 4
subsystem.
If both drivers are loaded at the same time, this one will be
given precedence as the more functional of the two.
.Sh HARDWARE
The
.Nm
driver supports the following controller chips:
.Bl -bullet -compact
.It
SiI3124 (PCI-X 133MHz/64bit, 4 ports)
.It
SiI3131 (PCIe 1.0 x1, 1 port)
.It
SiI3132 (PCIe 1.0 x1, 2 ports)
.It
SiI3531 (PCIe 1.0 x1, 1 port)
.El
.Sh FILES
.Bl -tag -width /dev/led/siisch*
.It Pa /dev/led/siisch*
identification LED device nodes
.El
.Sh SEE ALSO
.Xr ada 4 ,
.Xr ata 4 ,
.Xr cam 4 ,
.Xr cd 4 ,
.Xr da 4 ,
.Xr led 4 ,
.Xr sa 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Alexander Motin Aq mav@FreeBSD.org .