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IB/srp: Support SRP rev. 10 targets

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There has been a change in the format of port identifiers between
revision 10 of the SRP specification and the current revision 16A.

Revision 10 specifies port identifier format as

  lower 8 bytes :  GUID   upper 8 bytes :  Extension

Whereas revision 16A specifies it as 

 lower 8 bytes :  Extension  upper 8 bytes :  GUID

There are older targets (e.g. SilverStorm Virtual Fibre Channel
Bridge) which conform to revision 10 of the SRP specification.

The I/O class of revision 10 is 0xFF00 and the I/O class of revision
16A is 0x0100.

For supporting older targets, this patch:

1) Adds a new optional target creation parameter "io_class". Default
   value of io_class is 0x0100 (i.e. revision 16A)
2) Uses the correct port identifier format for targets with IO class
   of 0xFF00 (i.e. conforming to revision 10)

Signed-off-by: Ramachandra K <rkuchimanchi@silverstorm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ramachandra K
2006-06-17 20:37:38 -07:00
committed by Roland Dreier
parent 73c0996b1c
commit 0c0450db31
2 changed files with 42 additions and 3 deletions
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1
drivers/infiniband/ulp/srp/ib_srp.h
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@@ -122,6 +122,7 @@ struct srp_target_port {
__be64 id_ext;
__be64 ioc_guid;
__be64 service_id;
u16 io_class;
struct srp_host *srp_host;
struct Scsi_Host *scsi_host;
char target_name[32];