Note added FIS-based switching support.

share/man/man4/ahci.4

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 24, 2009
+.Dd January 28, 2010
 .Dt AHCI 4
 .Os
 .Sh NAME
@@ -114,14 +114,11 @@ ATAPI devices are handled by the SCSI protocol peripheral drivers
 etc.
 .Pp
 Driver features include support for Serial ATA and ATAPI devices,
-Port Multipliers, hardware command queues (up to 32 commands per port),
+Port Multipliers (including FIS-based switching, when supported),
+hardware command queues (up to 32 commands per port),
 Native Command Queuing, SATA interface Power Management, device hot-plug
 and Message Signaled Interrupts.
 .Pp
-The Port Multiplier FIS Based Switching feature added in the AHCI 1.2
-specification, which is required for effective parallel operation of devices
-behind Port Multipliers, is not yet supported.
-.Pp
 AHCI hardware is also supported by ataahci driver from
 .Xr ata 4
 subsystem. If both drivers are loaded at the same time, this one will be
@@ -131,6 +128,10 @@ The
 .Nm
 driver supports AHCI compatible controllers having PCI class 1 (mass storage),
 subclass 6 (SATA) and programming interface 1 (AHCI).
+.Pp
+Also, in cooperation with atamarvell and atajmicron drivers of ata(4),
+it supports AHCI part of legacy-PATA + AHCI-SATA combined controllers,
+such as JMicron JMB36x and Marvell 88SX61xx.
 .Sh SEE ALSO
 .Xr ada 4 ,
 .Xr cd 4 ,