05 of 10 LNX series - Add Memory Registration cb to fi_ops_srx_peer #10029
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amirshehataornl
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When checking fabric attributes with ofi_check_fabric_attr() make sure to consider provider exclusion. When checking to see if a provider name is given, only consider ones which are not excluded using the '^' character. Signed-off-by: Amir Shehata <shehataa@ornl.gov>
It is not efficient to do a reverse lookup on the AV table when a message is received. Some providers do not store the fi_addr_t associated with the peer in the header passed on the wire. And it is not practical to require providers to add that to wire header, as it would break backwards compatibility. In order to handle this case, an address matching callback is added to the peer_srx.peer_ops structure. This allows the provider receiving the message to register an address matching callback. This callback is called by the owner provider to match an fi_addr_t with provider specific address in the message received. The callback allows the receiving provider to do an O(1) index into the AV table to lookup the address of the peer, and then compare that with the source address in the received message. As part of this change provider specific address information needs to be passed to the owner provider, which the owner will need to give back to the receiving provider, when it attempts to do address matching. Update the SHM and LINKx providers to conform with the API changes Signed-off-by: Amir Shehata <shehataa@ornl.gov>
Add a new structure fi_peer_match to collect the parameters which need to be passed to the get_msg and get_tag functions. Update the util_get_tag() and util_get_msg() function callbacks. Compilation gives a warning but not failing. This causes memory corruption when the callbacks are called. Signed-off-by: Amir Shehata <shehataa@ornl.gov>
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Add a memory registration callback to the fi_ops_srx_peer. This allows core providers to expose a memory registration callback which the parent or peer provider can use to register memory on the receive path. For example the CXI provider registers memory with the NIC on the receive path. When using the peer infrastructure this can not happen because we do not know which provider will perform the receive operation. But if the source NID is specified then we can know and therefore we can perform the receive buffer registration at the top of the receive path. Signed-off-by: Amir Shehata <shehataa@ornl.gov>
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Add FI_PEER as a capability bit
Signed-off-by: Amir Shehata shehataa@ornl.gov