| XHCI(7D) | Devices | XHCI(7D) |
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(1M). See cfgadm_usb(1M) for more
information on how to specifically manage USB devices and how they are laid
out in the system. cfgadm(1M) is only used to manage
devices at a USB level. For example, a USB NIC would still be managed with
dladm(1M) 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(7D) 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(4) 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 | illumos |