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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. 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.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 array is the ABR base address.
hw.atm.hatmN.heregs
(Only if debugging enabled.) This is an array containing all card registers
including SUNI and the FLASH ROM.
hw.atm.hatmN.lbmem
(Only if debugging enabled.) Returns the contents of the local memory.
The driver supports the media options sdh, noscramb and unassigned (see utopia(4)).
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 interrupt 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 between 4 and 8192 inclusive.
When attaching the driver allocates this number of mbufs.
hw.hatmN.rbps1_thresh
Interrupt threshold for small receive buffer pool 1. 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.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 interrupt 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 interrupt 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 generated 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.
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
SEE ALSO
natm(4), natmip(4), utopia(4), ifconfig(8), route(8)
AUTHORS
Harti Brandt <harti@FreeBSD.org>
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.
The driver may not work with bounce buffer, because of bus_dmamap_sync(9) missing the offset
and len arguments the NetBSD function has.