Re: [PATCH V4 1/2] IB/core: Add support for enhanced atomic operations

[Vladimir Sokolovsky <vlad-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>]

Håkon Bugge wrote:
> On Apr 14, 2010, at 16:23 , Vladimir Sokolovsky wrote:
> 
>> The additional operands are carried in the Extended Transport Header
> 
> Is this a newly defined ETH which follows the AETH on the wire?
> 
> 
> 
> Thanks, Håkon
> 

Yes,
Atomic masked Fetch and Add uses first 64 bits to provide the date to add,
and the second 64 bits provide the field boundary:

Swap (or Add) data high [63:32]
Swap (or Add) data low  [31:0]
Compare data (or Field boundary) high [63:32]
Compare data (or Field boundary) high [31:0]

Atomic masked Compare and Swap uses:

Swap (or Add) data high [63:32]
Swap (or Add) data low  [31:0]
Compare data high [63:32]
Compare data high [31:0]
Swap mask high [63:32]
Swap mask low  [31:0]
Compare mask high [63:32]
Compare mask low  [31:0]


Regards,
Vladimir
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