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man pages section 4: Device and Network Interfaces

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Updated: Wednesday, July 27, 2022



qlcnic - QLogic 10 Gigabit Ethernet Driver




The qlcnic 10 Gigabit Ethernet driver is a multi-threaded, loadable, clonable, GLD-based STREAMS driver that supports the Data Link Provider Interface, dlpi(4P), on QLogic qlcnic 10-Gigabit 82xx, 83xx, and 84xx based Ethernet controllers.

The qlcnic driver supports SR-IOV capability on QLogic 83xx and 84xx based controllers.

The qlcnic driver functions include controller initialization, frame transmit and receive, promiscuous and multicast support, multiple transmit and receive queues, support for TCP Large Send Offload, support for TCP Large Receive Offload, and error recovery and reporting.

Application Programming Interface

The cloning character-special device, /dev/qlcnic, is used to access QLogic qlcnic 82xx, 83xx, and 84xx 10-Gigabit Ethernet devices installed on the system.

The qlcnic driver is managed by the dladm(8) command line utility. dladm allows VLANs to be defined on top of qlcnic instances and for qlcnic instances to be aggregated. See dladm(8) for details.

You must send an explicit DL_ATTACH_REQ message to associate the opened stream with a particular device (PPA). The PPA ID is interpreted as an unsigned integer data type and indicates the corresponding device instance (unit) number. The driver returns an error (DL_ERROR_ACK) if the PPA field value does not correspond to a valid device instance number for the system. The device is initialized on first attach and deinitialized (stopped) at last detach.

The values returned by the driver in the DL_INFO_ACK primitive in response to your DL_INFO_REQ are:

  • Maximum SDU is 9000.

  • Minimum SDU is 0.

  • DLSAP address length is 8.

  • MAC type is DL_ETHER.

  • SAP (Service Access Point) length value is -2, meaning that the physical address component is followed immediately by a 2-byte SAP component within the DLSAP address.

  • Broadcast address value is the Ethernet/IEEE broadcast address (FF:FF:FF:FF:FF:FF).

  • Once in the DL_ATTACHED state, you must send a DL_BIND_REQ to associate a particular SAP with the stream.


Link speed and mode can only be 10000 Mbps full-duplex. See the IEEE 802.3 Standard.



Special character device


64-bit device driver (x86)


64-bit device driver (SPARC)


Configuration file


See attributes(7) for descriptions of the following attributes:

SPARC, x86
Interface Stability

See Also

streamio(4I), dlpi(4P), driver.conf(5), attributes(7), dladm(8), netstat(8)

Writing Device Drivers in Oracle Solaris 11.4

STREAMS Programming Guide

IEEE 802.3 Standard