sas1r04: Arbitration and resource management in an expander device

Gil Romo gil.romo at qlogic.com
Mon Apr 19 11:38:38 PDT 2004


* From the T10 Reflector (t10 at t10.org), posted by:
* Gil Romo <gil.romo at qlogic.com>
*
The rules for generating Arb Won and Arb Lost, in 7.12.4.1, only specify what 
happens when an expander phy has a request and there is a higher priority 
request for that phy as the destination.  

They don't cover the case where two or more requests contend for the same 
destination phy.

Therefore, part c) of "The ECM shall generate the Arb Won confirmation when 
...", should be:
  "no higher priority connection requests are present with either this expander 
phy as the destination or with the destination expander phy of this request as 
the destination.".

And, part c) of "The ECM shall generate an Arb Lost confirmation when ...", 
should be:
  "there is a higher priority connection request for the destination expander 
phy of this request or the destination expander phy of this connection request 
has received a higher priority OPEN address frame with this expander phy as its 
destination ...".

------------
Gilbert Romo
Circuits & Integration
QLogic Corporation, Aliso Viejo, California
Office: 949-389-6266
E-mail: gil.romo at qlogic.com

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