fatm(4) device driver for Fore PCA200E ATM interfaces


device fatm device utopia device atm

options NATM


The device driver supports the FORE (now Marconi) PCA200E ATM interface cards. The driver interfaces with the natm(4) framework, netgraph(4) and HARP. It provides only PVC services. Signalling, ATMARP, ILMI and other higher layer protocols are implemented using netgraph(4) or HARP.

For configuring the card for IP see natmip(4). The following sysctls are recognized by the driver additionally to those handled by utopia(4):

hw.atm.fatm N .stats
Returns a device specific statistic list of Vt uint32_t statistic counters.
hw.atm.fatm N .istats
Returns a list of Vt uint32_t with internal driver statistics.
hw.atm.fatm N .retry_tx
If this is set packets are stuffed back into the interface's send queue when the cards transmit queue is found to be full. They are transmitted later. If this is not set the packets are dropped. It may be useful to set this if only UBR traffic is sent.
hw.atm.fatm N .debug
Bf Em (Only if debugging enabled.) Ef These are debugging flags. See src/sys/dev/fatm/if_fatmvar.h for the possible flags.

The driver supports the media options sdh , noscramb and unassigned (see utopia(4)).


fatm0: <FORE PCA200E> mem 0xd5800000-0xd59fffff irq 9 at device 9.0 on pci0


An Harti Brandt Aq [email protected]


These cards can CBR shape a single VCC only. It is currently possible to request more than one CBR connection. In this case all the timing will be wrong. See hatm(4) for a better card.