PM8621-BI PMC-Sierra, Inc., PM8621-BI Datasheet - Page 39

• 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 15: Driver External Interfaces – Typical Distributed Configurations
In a typical distributed configuration, multiple instances of the chipset driver can be deployed to
run under multiple microprocessors. Each CSD instance is most likely configured differently to
accommodate different system configurations. For instance, a typical line card may consist of
some PHY layer devices and one or more SBS devices, the CSD will then be configured to run
just the SBS device driver and all the physical SBS devices attached to the line card. On the
contrary, a typical switch card that consists of NSE devices requires the CSD to run with the NSE
device driver. All the NSE devices will be registered (added) as physical devices that are attached
to the card. Figure 16 shows another variation in a distributed system model with the CSD/OPA
physically detached from any physical SBS and NSE devices. An external link (e.g., Ethernet) is
required to act as the communication channel between all boards.
RTOS
System
System
Calls
Calls
System
Calls
API Call &
Callbacks
devices
Line/Service Card Application
Deivce
Driver
PHY
PHY
Application
Callbacks
Function
Calls
Line/Service Card
SBS device(s)
Narrowband
SBS Driver
CSD-
DAL
Layer
Link
LVDS
NSE device(s)
NSE Driver
Switch Card Application
Layer
Link
DAL
Narrowband CSD-
Narrowband Chipset Device Driver Manual
SwitchCard
Function
Open Path
Calls
(OPA Lib)
Library
Application
Callbacks
Software Architecture
System
Calls
RTOS
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