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qe(7D) Devices SunOS 5.5

NAME qe − QEC/MACE Ethernet device driver

SYNOPSIS #include <mace.h>

#include <qe.h>

#include <qec.h>

#include <dlpi.h>

DESCRIPTION qe is a multi-threaded, loadable, clonable, STREAMS hardware device driver supporting

the connectionless Data Link Provider Interface, dlpi(7P), over Am79C940 (MACE) Eth-

ernet controllers in the SBus QED card. qec(7D) is its parent in the Open Boot Prom dev-

ice tree. There is no ﬁxed limitation on the number of QED cards supported by the

driver. The qe driver provides basic support for the MACE and QEC hardware. Func-

tions include chip initialization,frame transmit and receive, multicast and promiscuous

support, and error recovery and reporting.

The cloning character-special device /dev/qe is used to access all MACE controllers

installed within the system.

qe and DLPI The qe driver is a “style 2” Data Link Service provider. All M_PROTO and M_PCPROTO

type msgs are interpreted as DLPI primitives. An explicitDL_ATTACH_REQ message by

the user is required to associate the opened stream with a particular device (ppa). The

ppa ID is interpreted as an unsigned long and indicates the corresponding device

instance (unit) number. An error (DL_ERROR_ACK) is returned by the driver if the ppa

ﬁeld value does not correspond to a valid device instance number for this system. The

device is initialized on ﬁrst attach and de-initialized (stopped) on last detach.

The values returned by the driver in theDL_INFO_ACK primitive in response to the

DL_INFO_REQ from the user are as follows:

The max SDU is 1500 (ETHERMTU).

The min SDU is 0.

The dlsap address length is 8.

The MAC type isDL_ETHER.

The sap length value is −2 meaning the physical address component is fol-

lowed immediately by a 2 byte sap component within theDLSAP address.

The service mode is DL_CLDLS.

No optional quality of service (QOS) support is included at present so the

QOS ﬁelds are 0.

The provider style isDL_STYLE2.

The version isDL_VERSION_2.

The broadcast address value is Ethernet/IEEE broadcast address (0xFFFFFF).

7D-270 modiﬁed 3 Mar 1994

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Adaptec AHA-1520A Manual de Serviço Página 274