[ofa-general] cxgb3: MW Support

[Steve Wise]

Philip Frey1 wrote:
>
> Are memory windows supported by the Chelsio T3 adapter? If so, what is 
> the verb to bind/unbind them?
>

MWs are supported in ofed-1.4, which is about the beta.   The support in 
linux/ofed is only for kernel-mode MWs. 

Are you doing user mode or kernel mode?

For kernel mode, you allocate a mw with ib_alloc_mw().  And you bind it 
with ib_bind_mw().  You can invalidate it by posting a IB_WR_LOCAL_INV 
work request to the send queue.  Then you can do a subsequent bind.  
Deallocate with ib_dealloc_mw().


For user mode, I have a patch series that adds support for MWs, but I 
hasn't been submitted yet for group review.  Its on my (very long) todo 
list. :)

Steve.