Sun Fire v480/v490 and Sun Fire v880/v890 systems with patches 121689-03/121688-03 and Sun Fire 12k/15K/E20K/E25K systems with patch 124460-02 may experience a Solaris panic during a round-trip from Solaris to OpenBoot (OBP) and back when using the "Stop-A - go" sequence. A Solaris/OpenBoot round-trip may result in FORTH stack corruption that will break consistent DMA functionality and cause a Solaris panic.

Patches 121689-03, 121688-03, and 124460-02 are WITHDRAWN and are no longer available from SunSolve.

This issue can occur on the following platforms:

SPARC Platform

• Sun Fire V480/V490 with OpenBoot 4.22.29 (as delivered in patch 121689-03)
• Sun Fire V880/V890 with OpenBoot 4.22.29 (as delivered in patch 121688-03)
• Sun Fire 12K/15K/E20K/E25K with OpenBoot 4.22.29 (as delivered in patch 124460-02)

Notes:

1. This issue only occurs when executing the "Stop-A - go" sequence.
2. On Sun Fire 12k/15K/E20K/E25K systems this issue occurs only when using a Schizo I/O board.

To determine if a Schizo I/O board is in use, run the following command:

    $ cfgadm -s "select=type(HPCI)"
    Ap_Id       Type         Receptacle     Occupant       Condition
    IO2         HPCI         connected      configured     ok
    IO4         HPCI         connected      configured     ok

The current OpenBoot firmware revision level can be obtained by running the "prtdiag -v" command.

After a "Stop-A - go" sequence is issued, the following panic can be seen on Schizo based systems:

    panic[cpu2]/thread=2a100337d40: pcisch2 (pci@9,700000): 
    consistent dma sync timeout

If the FORTH stack corruption occurs, a different panic message may be observed.

To avoid this issue until new patches are released and installed, do not break from Solaris to OpenBoot on Schizo based systems.

This issue is addressed on the following platforms:

SPARC Platform

• Sun Fire V480/V490 with OpenBoot 4.22.34 (as delivered in patch 121689-04 or later)
• Sun Fire V880/V890 with OpenBoot 4.22.34 (as delivered in patch 121688-04 or later)
• Sun Fire 12K/15K/E20K/E25K with OpenBoot 4.22.32 (as delivered in patch 124460-03 or later)

• Updated Contributing Factors and Resolution sections

• Updated Resolution section
• State: Resolved

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