SP state machine changes

Sheffield, Robert L robert.l.sheffield at intel.com
Tue Sep 21 16:32:15 PDT 2004


* From the T10 Reflector (t10 at t10.org), posted by:
* "Sheffield, Robert L" <robert.l.sheffield at intel.com>
*
Mr. Dutton,

Sorry for not replying sooner.

I believe you have indeed found some errors.

"DWS Lost Timeout" should be "DWS Lost Message received"

You are also correct about the transition defined in 6.7.5.8.2.
The transition should be to SP0:OOB_COMINIT.
(This error has been there since SAS-r05, before SAS-1.1)

And you are also correct about the error in 6.7.6.1
"SP5" above should be "SP25"

Thankyou for your thourough review of the document. I'll work with the
editor to make sure the errors are corrected.

Regards,
Bob Sheffield

-----Original Message-----
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Fred
Dutton
Sent: Tuesday, September 14, 2004 3:48 PM
To: t10 at t10.org
Subject: SP state machine changes

* From the T10 Reflector (t10 at t10.org), posted by:
* Fred Dutton <fred.dutton at qlogic.com>
*

Excerpt from SAS-1.1 Rev 5, 6.7.3.2.1:

"State machine variable MgmtReset shall be set to one if this state is
entered 
due to a Management Reset request or SMP Reset request. MgmtReset shall
be set 
to zero if this state is entered due to a power on, a hard reset, DWS
Lost 
timeout, or COMINIT received."

Could someone clarify what is meant by "DWS Lost timeout"?

I assume it refers to the "DWS Lost" message sent by the DWS state
machine
to the SP state machine, but I've never seen it referred to as a
"timeout".
There is a "DWS Reset Timeout" in the DWS state machine which generates
a "DWS 
Reset message to the SP hence my confusion.

Also, I noticed a couple of errors in the spec:

Page 138:
--------
"6.7.5.8.2 Transition SP22:SATA_PHY_Ready to SP1:OOB_COMINIT"

"SP1" above should be "SP0"


Page 140:
--------
"6.7.6.1 State description

Figure 71 shows the SP5:SATA_PortSelectionSignalPending state. This
state 
controls transmission of the SATA port selection signal when a specified
phy 
processes an SMP Phy Control (Transmit SATA Port Selection Signal)
request."

"SP5" above should be "SP25"



----------------------------------------------------
Fred Dutton * QLogic * 949.389.6340




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