Or Gerlitz wrote:
Steve Wise wrote:
Are we sure we need to expose this to the user?
I believe this is the way to go if we want to let smart ULPs generate
new rkey/stag per mapping. Simpler ULPs could then just put the same
value for each map associated with the same mr.
Or.
How should I add this to the API?
Perhaps we just document the format of an rkey in the struct ib_mr.
Thus the app would do this to change the key before posting the
fast_reg_mr wr (coded to be explicit, not efficient):
u8 newkey;
u32 newrkey;
newkey = 0xaa;
newrkey = (mr->rkey & 0xffffff00) | newkey;
mr->rkey = newrkey
wr.wr.fast_reg.mr = mr;
...
Note, this assumes mr->rkey is in host byte order (I think the linux
rdma code assumes this in other places too).
Steve.
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