MirBSD manpage: awi(4)

AWI(4)                     BSD Programmer's Manual                      AWI(4)


     awi - BayStack 650 IEEE 802.11FH PCMCIA wireless network driver


     awi* at pcmcia? function ?


     The awi driver provides support for wireless adapters based upon the AMD
     802.11 PCnet Mobile firmware. This includes the following adapters:

           Bay Networks BayStack 650
           Bay Networks BayStack 660
           Bay Network AirSurfer Pro
           AMD Am79C930
           Icom SL-200
           Nokia C020
           Farallon Communications SkyLINE Wireless
           Zoom Air-4000

     The PCnet Mobile design is based on an AMD 79c930 controller, which pro-
     vides access to 32kb of memory shared between the controller and the
     host. All host/device interaction is via this shared memory, which can be
     accessed either via PCMCIA memory space or I/O space. The awi driver en-
     capsulates all IP and ARP traffic as 802.11 frames. Transmit speed is
     fixed at 1Mbps.

     The driver currently only works in infrastructure mode, communicating
     with an Access Point which serves as a link-layer bridge between an Eth-
     ernet and the wireless network.

     This card seems to take between 5 and 20 seconds after it has been
     brought up to synchronize with an AP. When using dhclient(8) to automati-
     cally configure an address on this card, it may be advisable to delay the
     invocation of dhclient for about 10 seconds after the card is brought up
     using ifconfig(8).


     awi0: unable to allocate memory space; using i/o only  Indicates that the
     driver was not able to allocate 32kb of PCMCIA bus address space into
     which to map the device; the driver will use the (slightly slower) i/o-
     space only access methods to read and write to the shared memory. This
     message is in some sense to be expected and should not be a cause for
     alarm. See pcmcia(4) for information on how to increase the memory avail-
     able to the PCMCIA controller.

     awi0: selftest failed (code %x)  The device failed to pass its internal

     awi0: device failed to complete selftest (code %x)  The device failed to
     complete its self test within 5 seconds.

     awi0: device timeout
     awi0: timeout waiting for command completion  The device failed to gen-
     erate an interrupt to acknowledge a command.

     awi0: transmit timeout  The device failed to generate an interrupt to
     acknowledge a transmitted packet.

     awi0: large frame truncated  The system handed the driver a packet which
     was too large to transmit in one piece.

     awi0: device enable failed  The system was unable to power on the card.

     awi0: associated with %s, SSID: %s  The device has successfully synchron-
     ized with the identified Access Point and is ready to relay traffic.

     awi0: no recent beacon from %s; rescanning  The device has not heard a
     beacon from its currently associated Access Point recently, and is look-
     ing for a new Access Point.

     awi0: received deauth  The Access Point the card was most recently asso-
     ciated with has forgotten about us.


     arp(4), ifmedia(4), intro(4), netintro(4), pcmcia(4), hostname.if(5),

     Am79C930 PCnet Mobile Single-Chip Wireless LAN Media Access Controller,


     The awi device driver first appeared in OpenBSD 2.7.


     The awi driver was written by Bill Sommerfeld <sommerfeld@netbsd.org> and
     ported to OpenBSD by
     Angelos D. Keromytis <angelos@dsl.cis.upenn.edu>


     Doesn't support ad-hoc mode or WEP. Round trip times seem higher than
     what one might expect.

MirBSD #10-current              March 20, 2004                               1

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