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hatm(4)

NAME

     hatm -- device driver for Fore/Marconi HE155 and HE622 ATM interfaces

SYNOPSIS

     device hatm
     device utopia
     device atm

     options NATM

DESCRIPTION

     The hatm device driver supports the FORE (now Marconi) HE155 and HE622
     ATM interface cards.  The driver interfaces with the natm(4) framework,
     netgraph(4) and the HARP ATM stack.  It provides only PVC services.  Sig-
     nalling, 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.hatm.natm_traffic
	     This is the traffic type to be used for NATM pvc connections.
	     The type of this variable is integer and it must have one of the
	     values 0 (UBR) or 1 (CBR).

     hw.atm.hatm.natm_pcr
	     This is the peak cell rate to be used for NATM CBR connections.

     hw.atm.hatmN.stats
	     Contains an array of uint32_t with device specific statistics.

     hw.atm.hatmN.istats
	     Contains an array of uint32_t with internal driver statistics.

     hw.atm.hatmN.debug
	     (Only if debugging enabled.)  These are the debugging flags.  See
	     src/sys/dev/hatm/if_hatmvar.h for the possible flags.

     hw.atm.hatmN.tsr
	     (Only if debugging enabled.)  This is an array containing all
	     transmission status registers.  For each of the 4096 possible
	     VCCs there are 15 32-bit registers.

     hw.atm.hatmN.tpd
	     (Only if debugging enabled.)  This is an array containing all on
	     card current transmission packet descriptors.  For each of the
	     4096 possible VCCs there are 16 32-bit registers.

     hw.atm.hatmN.mbox
	     (Only if debugging enabled.)  This is an array containing the
	     mbox registers.

     hw.atm.hatmN.cm
	     (Only if debugging enabled.)  This is an array containing all
	     connection memory registers.  The first 32-bit integer of this
	     memory.

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

DIAGNOSTICS

     hatm0: <FORE HE> mem 0xd2600000-0xd26fffff irq 9 at device 15.0 on pci2
     hatm0: ForeRunnerHE 622, Rev. D, S/N 2949834, MAC=00:20:48:2d:02:ca

ENVIRONMENT

     When attaching to a device the driver checks the kernel environment (see
     kenv(1)) to see if the default queues sizes should be overwritten or not.
     The following variables are checked and interpreted as unsigned integer
     values (in either radix):

     hw.hatmN.rbps0_size
	     Size of the small receive buffer pool 0.  This pool is used for
	     all except raw AAL connections.  The pool size must be a power of
	     two between 4 and 8192 inclusive.	When attaching the driver
	     allocates this number of mbufs.

     hw.hatmN.rbps0_thresh
	     Interrupt threshold for small receive buffer pool 0.  When the
	     number of free buffers in the pool falls below this threshold it
	     generates an interrupt so that the driver can refill the pool.

     hw.hatmN.rbpl0_thresh
	     Size of the large receive buffer pool 0.  This pool is used for
	     all except raw AAL connections.  The pool size must be a power of
	     two between 4 and 8192 inclusive.	When attaching the driver
	     allocates this number of mbufs with clusters.

     hw.hatmN.rbpl0_thresh
	     Interrupt threshold for large receive buffer pool 0.  When the
	     number of free buffers in the pool falls below this threshold it
	     generates an interrupt so that the driver can refill the pool.

     hw.hatmN.rbrq0_size
	     Size of receive buffer return queue 0.  This queue is used to
	     return buffers filled with received frames to the driver.	The
	     size must be a power of 2 between 1 and 16384 inclusive.

     hw.hatmN.rbrq0_thresh
	     Interrupt threshold for receive buffer return queue 0.  This
	     threshold should only be triggered in exceptional cases.

     hw.hatmN.rbrq0_tout
	     Interrupt timeout for receive buffer return queue 0.  An inter-
	     rupt is generated after this time if the queue is not empty.  The
	     number is in internal card ticks.

     hw.hatmN.rbrq0_pcnt
	     Packet count threshold for receive buffer return queue 0.	An
	     interrupt is generated if this number of packets is in the queue.

     hw.hatmN.rbps1_size
	     Size of the small receive buffer pool 1.  This pool is used for
	     all raw AAL connections.  The pool size must be a power of two

     hw.hatmN.rbrq1_size
	     Size of receive buffer return queue 1.  This queue is used to
	     return buffers filled with received cells to the driver.  The
	     size must be a power of 2 between 1 and 16384 inclusive.

     hw.hatmN.rbrq1_thresh
	     Interrupt threshold for receive buffer return queue 1.  This
	     threshold should only be triggered in exceptional cases.

     hw.hatmN.rbrq1_tout
	     Interrupt timeout for receive buffer return queue 1.  An inter-
	     rupt is generated after this time if the queue is not empty.  The
	     number is in internal card ticks.

     hw.hatmN.rbrq1_pcnt
	     Packet count threshold for receive buffer return queue 0.	An
	     interrupt is generated if this number of cells is in the queue.

     hw.hatmN.irq0_size
	     Size of interrupt queue 0.  This must be a number between 1 and
	     1023 inclusive.

     hw.hatmN.irq0_thresh
	     Interrupt retrigger threshold of interrupt queue 0.  A new inter-
	     rupt is trigger if the queue fill state reaches this threshold
	     and the interrupt was no served.

     hw.hatmN.tbrq0_size
	     Transmit buffer return queue 0 size.  This queue is used to feed
	     back empty buffers of transmitted frames back to the driver.  It
	     must be a power of 2 between 1 and 4096 inclusive.

     hw.hatmN.tbrq0_thresh
	     Transmit buffer return queue 0 threshold.	An interrupt is gener-
	     ated if the queue fill state reaches this point.

     hw.hatmN.tpdrq_size
	     Transmit descriptor ready queue size.  This queue is used by the
	     driver to feed transmit descriptors into the card.  The size must
	     be a power of 2 between 1 and 16384 inclusive.

     hw.hatmN.tpdmax
	     Maximum number of active TPDs per connection.  This controls the
	     maximum number of outstanding packet chunks per connection and
	     thus the maximum delay packets can have because of queueing on
	     the adapter.  If set to 0, a connection can eat up all available
	     TPDs.

     hw.hatmN.mbuf_max_pages
	     Maximum number of memory pages allocated to small external mbufs.
	     This must not be zero and not larger than 65536.

CAVEATS

     When putting a HE155 into a 64-bit 66MHz PCI slot the machine may hang.
     This occurs very early in the POST so that even the display does not turn
     on.  The HE155 runs only in 33MHz slots (either 32 or 64-bit).  HE622
     cards work just fine in 64-bit slots.


FreeBSD 5.4			 May 15, 2003			   FreeBSD 5.4

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