| XHCI(4D) | Devices | XHCI(4D) |
xhci —
xhci driver supports PCI devices that implement
versions 1.0 and 1.1 of the Extensible Host Controller Interface
Specification. These devices provide support for USB 3.0, USB 2.x, and USB 1.x
devices and is integrated into the broader illumos USB Architecture (USBA).
The xhci driver supports all four USB
transfer types: bulk transfers, control
transfers, interrupt transfers, and
isochronous transfers.
Administrators do not interact with the
xhci driver directly. USB devices are managed with
cfgadm(8). See
cfgadm_usb(8) for more information
on how to specifically manage USB devices and how they are laid out in the
system. cfgadm(8) is only used to
manage devices at a USB level. For example, a USB NIC would still be managed
with dladm(8) at a networking
level.
On some x86 systems USB ports may be routed to either an instance
of the xhci driver or an instance of the
ehci(4D) driver. By default, all such
ports are routed to the xhci driver, allowing those
devices to operate at USB 3.x speed by default. This is most common on Intel
platforms and chipsets. While this is controlled with the
xhci-reroute property discussed below, changing it may not
be sufficient to change the behavior. The BIOS or ACPI data for many x86
systems may toggle this automatically.
xhci driver supports the following properties which
may be tuned in the xhci driver's
driver.conf(5) file.
xhci driver. The
default behavior is to route such ports. To disable this, the property
should be set to 0. Any other value, or the lack of the
property, cause the default behavior to take place.xhci driver is only supported on
x86 systems at this time.
| January 10, 2020 | OmniOS |