[T10] Query regarding XFER_RDY frame

Tim Symons tim.symons at microsemi.com
Tue Jan 30 16:25:53 PST 2018


Lana,

These two mechanisms are not directly related:

*         The "Target Port Transfer Tag" is an optional method for an SSP target port to enable identification of read and write data context when two or more commands are incomplete.

*         XFER_RDY is used by the phy to indicate that it is ready to receive more data frames and indicates the number of bytes of write data the SSP initiator port may transmit.

If the Target Port Transfer Tag method is being used, then the field contains the unique tag corresponding to the data transaction. 0000h is a valid tag value.
If the Target Port Transfer Tag method NOT is being used, then the field is ignored.

An excerpt from SPL-4r13 is attached.

Regards
Tim.


Tim Symons | Storage Architect
Microsemi Corporation
Tim.Symons at microsemi.com<mailto:Tim.Symons at microsemi.com>

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From: Lana Chan [mailto:lana at cadence.com]
Sent: Monday, January 15, 2018 9:39 AM
To: t10 at t10.org
Subject: Query regarding XFER_RDY frame

Hello,
I would like to have clarification on whether or not a Target device can send XFER_RDY frame when "Target Port Transfer Tag" is set to 0

Kind Regards
Lana

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