hH
TACHYON*
Fibre Channel
Interface Controller
Product Overview
HPFC-5000
Description
TACHYON is a fundamental
building block compatible with
Hewlett-Packard鈥檚 Fibre Chan-
nel solution which includes
interface controllers, physical
link modules, adapters, switches
and disk drives.
The TACHYON architecture
supports both networking and
mass storage connections to
provide a low cost, high perfor-
mance solution with low host
overhead.
DATA STRUCTURES IN THE HOST
SFS
INBOUND MFS
MESSAGE BUFFER BUFFER
QUEUE QUEUE QUEUE
INBOUND
DATA
SCSI
EXCHANGE
STATE
TABLE
HIGH
OUTBOUND PRIORITY
COMMAND COMMAND
QUEUE
QUEUE
OUTBOUND
DATA
INBOUND
BLOCK
MOVER
INBOUND
MESSAGE
CHANNEL
INBOUND
SFS & MFS
BUFFER
CHANNELS
BACKPLANE
INTERFACE
SCSI
READ/WRITE
CHANNEL
OUTBOUND
MESSAGE
CHANNEL
OUTBOUND
BLOCK
MOVER
FCP ASSISTS
SCSI
BUFFER
MANAGER
SCSI
EXCHANGE
MANAGER
Features
鈥?Single chip Fibre Channel
interface (no I/O processor
required)
鈥?Supports 1062.5, 531, and 266
MBaud links
鈥?Supports 3 topologies; direct
connect, fabric, and Fibre
Channel Arbitrated Loop
(FC-AL)
鈥?Supports Fibre Channel Class
1, 2, and 3 Services
鈥?Supports up to 2-Kbyte frame
payload for all classes of ser-
vice
鈥?Sequence segmentation/
reassembly in hardware
INBOUND
DATA
MANAGER
SEQUENCE MANAGEMENT
INBOUND
SEQUENCE
MANAGER
ACKs
OUTBOUND
SEQUENCE
MANAGER
INBOUND
DATA
FIFO
ACKs
ACK
FIFO
OUTBOUND
FRAME
FIFO
RECEIVE
20B/16B
DECODER
10B/20B
DE-MUX
OS PROCESSOR/
CRC CHECKER
OS/CRC
GENERATOR
16B/20B
ENCODER
20B/10B
MUX
TRANSMIT
ELASTIC STORE/
SMOOTHING
BUFFER
*
TACHYON (tak' - e - 盲n)
1. a subatomic particle that only exists at
speeds faster than the speed of light.
2. HP鈥檚 Fibre Channel Interface chip.
LOOP/
N_PORT
STATE
MACHINE
GIGABIT LINK MODULE
Figure 1. TACHYON Internal Block Diagram
1
2
