PM8621-BI PMC-Sierra, Inc., PM8621-BI Datasheet - Page 40

• Manufacturer Part Number: PM8621-BI
• Description: Driver, NSE/SBS Narrowband Chipset Driver
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2021248, Issue 1
Figure 16: Driver External Interfaces – Typical Distributed Configurations (Standalone OPA)
The flexibility of the CSD lends itself to easy adaptation to all of the different system
configurations shown (or any other custom system configurations). The most important concept is
that there should only be one active OPA in the working system of a distributed system. In other
words, only one CSD instance should be configured to run the OPA. The OPA schedules calls in
the fabric and keeps the record of all existing calls. It therefore acts as the central repository for
all the records. Since this CSD/OPA has to be aware of all devices in the fabric, devices that are
not local to this CSD/OPA must be added as “logical” devices (The status of the device is
declared when adding the device via
the existence of the SBS or NSE devices in the fabric, though not directly under its control. (In
the case of a 1+1 redundant fabric system, a second (standby) copy of the OPA is allowed to run
in parallel with the working copy.)
Application Programming Interface
The driver’s Application Programming Interface (API) is a list of high-level functions that can be
invoked by application programmers to configure, control, and monitor Narrowband Chipset
devices. The API includes functions that:
·
·
·
·
·
RTOS
Manage the chipset devices
Perform diagnostic tests
Perform run-time system diagnostics with PRBS generators and monitors
Configure and control system interface/clock
Retrieve status and counts information
System
System
Calls
Calls
System
Calls
devices
Deivce
Callbacks
Driver
API Call
PHY
PHY
Line/Service Card
&
Application
Line/Service
SBS Driver
Function
device(s)
Calls
CSD-
Card
DAL
SBS
nbcsAdd
Application
Callbacks
Communication Link
LVDS
). This allows the CSD/OPA to properly recognize
Function
NSE device(s)
Calls
Switch Card
SwitchCard
NSE Driver
Application
CSD-
Narrowband Chipset Device Driver Manual
DAL
Application
Callbacks
Switch Card Application
NULL
DAL-
Standalone
Software Architecture
CSD-
Function
Open Path
(OPA Lib)
Calls
Library
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