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     siis — SiliconImage Serial ATA Host Controller driver


     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           device pci
           device scbus
           device siis

     Alternatively, to load the driver as a module at boot time, place the following line in


     The following tunables are settable from the loader(8):

     controls Message Signaled Interrupts (MSI) usage by the specified controller.

     controls SATA interface Power Management for the specified channel, allowing some power to
     be saved at the cost of additional command latency.  Possible values:

           0   interface Power Management is disabled (default);

           1   device is allowed to initiate PM state change, host is passive.

     Note that interface Power Management is not compatible with device presence detection.  A
     manual bus reset is needed on device hot-plug.

     setting to nonzero value limits maximum SATA revision (speed).  Values 1, 2 and 3 are
     respectively 1.5, 3 and 6Gbps.


     This driver provides the CAM(4) subsystem with native access to the 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 ada(4).  ATAPI devices are
     handled by the SCSI protocol peripheral drivers cd(4), da(4), sa(4), etc.

     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

     The activity LEDs of the adapters supported by the siis driver can be controlled via the
     led(4) API for localization or status reporting purposes.


     The siis driver supports the following controller chips:

        SiI3124 (PCI-X 133MHz/64bit, 4 ports)
        SiI3131 (PCIe 1.0 x1, 1 port)
        SiI3132 (PCIe 1.0 x1, 2 ports)
        SiI3531 (PCIe 1.0 x1, 1 port)


     /dev/led/siisch*  identification LED device nodes


     ada(4), ata(4), cam(4), cd(4), da(4), led(4), sa(4)


     The siis driver first appeared in FreeBSD 8.0.


     Alexander Motin <>