PM3350-SW datasheet(119/224 Pages) PMC

119 / 224 page

ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

117

Attach frame to

transmit queue

Frame receive

begins

DMA fills PBs

& looks up

addresses

Frame receive

done

Queue frame

on work queue

Work queue

interrupt

Process work

queue interrupt

Attach frame to

PCI transfer

queue(s)

Check frame,

decrement

buffer count

Increment request

counter

DMA transmits

frame

Frame transmit

done, interrupt

Read DD &

process frame

Free DD & PBs

Increment SRC

port buffer count

Update SRC

stats

Update stats

Read frame

data from DMA

Source

Receive

Process

Source

Switching

Process

Destination

Transmit

Process

Process req.

ctr. interrupt

Decrement

buffer limit

DMA allocates

local PBs

Set up PCI

DMA transfer

DMA copies

data to PBs

Transfer done;

DMA interrupts

Allocate DD for

DMA to use

Increment

acknowledge

counter

Destination

Transfer

Process

Check frame &

hash bucket

Destination

Switching

Process

Work queue

interrupt

Free SRC PBs

+ DD

Source

Acknowledge

Handler

Attach

frame

to work

queue

Initiate

frame

transmit

Increment expansion

port buffer count

DMA

Firmware

DMA

Firmware

DMA

Firmware

PM3350-SW Datasheet(PDF) 119 Page - PMC-Sierra, Inc

PM3350-SW Datasheet(HTML) 119 Page - PMC-Sierra, Inc

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